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Table of Content

    15 November 2013, Volume 42 Issue 11
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    Research of Detection and Comprehensive Treatment of Underground Mine Goaf and its Application
    ZHANG Lin, SUN Guo-Quan, LI Tong-Peng, LIU Hai-Lin, WANG Liang, LU Yu-Gen
    2013, 42(11):  1-4+138. 
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    In view of the characteristics of goaf，an integrated treatment technique of stability evaluation of goaf and surrounding rock including goaf detection，modeling，stability analysis and governance was proposed，realizing the coupling linker between the complicated detecting (CMS goaf detection)-goaf three-dimensional modeling (with related mine software) -numerical calculation(with FLAC3D) Then，its successful applications in a number of mines as cases are introduced.
    Research on the Law of Golf Ground Movement under the Riverbed and the Treatment Scheme
    ZHANG Yu-Fu
    2013, 42(11):  5-9. 
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    The FEM is applied in research of surface subsidence rule at goaf under the riverbed in Xishimen iron ore In comparison with the drilling data，it is considered that this method can effectively predict the scope and trends of surface subsidence caused by mining Based on the forecast analysis，the riverbed and the goaf under riverbed are treated from three aspects of goaf's filling，shallow fissure grouting and surface sealing，and the scheme above is verified to be effective through numerical calculation.
    Study on the Upward High Layer Continuous Cut and Fill Mining Method for Steeply Inclined Large-thick Ore-body
    MA Yi-Min, ZHOU Wen-Lue
    2013, 42(11):  10-13. 
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    In view of the characteristics of the steeply inclined large-thick iron ore body such as large changing morphology，many rock interlayer，and through the innovation on traditional upward high layer continuous cut and fill mining method，the upward high layer continuous cut and fill mining method with a main transport roadway and 225 m sublevel and 75 m slice in height without any auxiliary section is proposedMeanwhile，the techniques like pillars setting in stope，roof horizontal smooth blasting，and full-tailings backfill，are utilized to effectively reduce the dilution rate，decrease the safety issues in drilling at the empty field and ore drawing，and lower the backfilling costsThe practice has proved that this method above can effectively reduce the amount of mining preparation，improve mining efficiency，and reduce production costs.
    FLAC3D Numerical Analysis of Pressure Movement Laws of Underground Phosphate Mining
    LI Xiao-Shuang, LI Yao-Ji, WANG Meng-Lai
    2013, 42(11):  14-16+20. 
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    Taking deep ore-body of north mining area in Jinning phosphate No 2 pithead of Yunnan phosphate group corporation as engineering background，the stability of stope roof and surrounding rock and mining pressure movement's laws for different thickness of phosphate ore during underground mining process of deep phosphate were studied with FLAC3D numerical simulation software The numerical calculation results show that:①The weight of rock above the goaf，transferred to the new supporting points around the goaf Then the distressed zone was formed which is located in the roof，and bearing pressure zone was located ahead of the goaf and both sides ore wall beside the goaf With the advancing of the mining stope，the leading bearing pressure zone moved forward，and the affected areas by mining of the overlying strata is also expanded;②Under the inclination orebody，the stress state of the upper and lower part of the overlying strata above the goaf after excavating，were uneven and asymmetric，and the ground pressure in the upper part was more obviously then that in the lower part;③With the increasing of the thickness of the seam，the areas affected by mining of the overlying strata became bigger after the mined-out area was formed，but the ground pressure appears weakening stress concentration factor of the bearing pressure zone in front of the goaf and ground pressure became smaller The maximum stress concentration of the bearing pressure zone in front of the goaf is decreased，and its plastic zone expanded.
    Stability Analysis of the Goaf Surrounding Rock and the Treatment Scheme for Stage Room Mining Method
    LI Yuan-Hui, DONG Long-Bin, JIE Shi-Jun, Zhao-Xing-Dong
    2013, 42(11):  17-20. 
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    After years of exploitation in Zhangjiagou Pyrite，groups of underground goaf were formed，which have brought great security risk to the lower ore miningOn the basis of comprehensively analyzing the current goaf situation and geological overview of Zhangjiagou Pyrite，three stoping plans were proposed，and the stability of goaf on +120 m level was calculated by using FLAC3D .The variation of stress field of pillar and surrounding rock under different stoping schemes was studiedThrough contrasting and analyzing，stope sequence was determinedAnd on this basis，the goaf treatment scheme was proposed，which could form a sufficient thickness loose cushion in 113 stope bottom pillar by caving roofThe results can provide scientific basis for the construction and design.
    Optimization Research of Ore Recovery with Pillarless Sublevel Caving Method in an Iron Mine
    TAN Bao-Hui, ZHANG Zhi-Gui
    2013, 42(11):  21-24+28. 
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    An iron mine in Sichuan which adopted the pillarless sublevel caving method for gently inclined medium-thick ore-body has greatly increased the scale of production after capacity expansion and renovation Due to various reasons，it did not reach the production capacity，resulting in large pressure in mine production，and seriously restricting the development of enterprises and economic benefits Therefore，according to the occurrence characteristics of the ore，the pillarless sublevel caving method for the gently inclined medium-thick ore-body was improved，forming a suitable process for the ore-body above Then new process can maximize the ore recovery rate and reduce the loss and dilution rate，thus providing a valuable reference for similar mines.
    Study on the Influence of Complex Mined-out Area Group on Stability of Mine Slope with Numerical Simulation
    HU Jian-Jun, HUANG Yu-Zhu, WU Peng, JIE Lian-Ku, WAN Chuan-Chuan
    2013, 42(11):  25-28. 
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    Based on the complex mined-out area group of gold deposit in Hebei，the three dimensional calculation model is built with FLAC3D，and used to study the stability of mine open-pit slope under the influence of complex mined-out area group，and the safety factors of slope stability in typical sections have been calculated The results show that the mined-out area group has little impact on the overall stability of slope However，the mined-out area near the slope may cause local instability The slope safety factor is advanced significantly when it has been filled with waste，and the stability is improved obviously This research method can be as a reference for similar mines.
    Stability Analysis and Treatment of Polylaminate Goaf
    HU Cong-Qian, WANG De-Sheng, CUI Shuai-Li, NA Mi-Ri
    2013, 42(11):  29-33+37. 
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    Based on geological survey at the scene and studies on rock mechanical properties of experimental samples，a analytical study is conducted using FLAC3D numerical simulation for the multilayer，multi-block and cross-stack complex goaf system of Weike Mine The calculating results show that the goaf system is in a stable state Then the numerical simulation study on the goaf processing plan proposed by the mine is carried out This analysis indicates that the treated goaf system is comparatively stable as a whole with partly cut through in structure，which does not achieve the desired effect of avalanche and penetrating the surface Based on stability analysis of goaf system，the improvement program to treat the goaf system is proposed Above all，considering various factors，the safe thickness of the goaf roof is comprehensively determined and the rocks at the top of security layer are stripped by blasting Then the reserved security layer of the roof at the top of the goaf is disposed with open deep hole compression blasting，thus an overlying rock protection layer of sublevel caving was formed by filling empty areas of breakout rock Finally the remaining rock system pillars are collapsed to achieve the treatment of the goaf.
    Numerical Simulation on Key Technology for Replacement and Recycling of Horizontal-boundary Isolating Pillars
    XU Zhen-Hua, QIAO Lan, LI Zhen-Lin
    2013, 42(11):  34-37. 
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    In view of the engineering practice in replacement and recycling of horizontal-boundary isolating pillar during the transition from open pit to underground，the finite element analysis software GeoFBA is used to establish the numerical calculation model to evaluate the feasibility and risk of the key techniques for replacement and recycling of horizontal boundary isolating pillars with the artificial filling bodyThe stress distribution laws and displacement trends on the underground environment before or after the replacement of horizontal boundary isolating pillars are revealed，and the optimal artificial replacement and recycling sequences are determinedThe simulation results provide an important guiding for the safety replacement and recycling of the horizontal-boundary isolating pillars in the mine.
    Study on Fuzzy Cluster Classification and Comprehensive Control Countermeasures of the Goaf Group in Fozichong Mine
    MA Xiong-Zhong, WANG Wen-Jie
    2013, 42(11):  38-42+142. 
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    In order to study the stability classification and the comprehensive processing of goaf group in the 104# orebody of Fozichong mine，and on the basis of earlier exploration of the goaf，simulation analysis on the stability of goaf group was made based on ANSYS and FLAC3D coupling By selecting four factors including the exposed area of the goaf roof，the maximum principal stress，the minimum principal stress and the maximum displacement from numerical calculation，the goaf group are classified with the fuzzy clustering theory to realize four level classification of goaf stability Aimed at these four kinds of goaf，such treatment measures as strengthening monitoring and management，strengthening support，partial backfill and whole backfill were respectively proposed to ensure the production safety of Fozichong mine and save the handling cost of goaf.
    Investigation on Characteristics of High Pressure Grinding Roller Product of Tungsten ore from Yanglin'ao
    SUN Ye-Chang
    2013, 42(11):  43-45. 
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    The size characteristics of the product after grinding of tungsten ore by high-pressure grinding roller from Yanglin'ao Dressing Plant of Hunan Yuanjing Tungsten Mine Industry and its relative grindability were studied. The results showed that: ① High pressure grinding roller can greatly increase the contents of intermediate and fine particle product; ②Pressure increasing at roller surface can improve the content of fine fraction and the crushing ratio; ③ Narrowing the closed-circuit sieve mesh size can increase the content of intermediate and fine products of high pressure grinding roller，and improve the relative grindability of closed-circuit roller grinding product. ④High pressure grinding roller can significantly improve the relative grindability of products. For coarse ores，its relative grindability was significantly increased; In case of the roll surface pressure of 4.5 MPa，mesh size of 3 mm，grinding fineness of -0.075 mm 50%，the relative grindability coefficient of the sample can reach 1.55，which increasing the first step grinding significantly.
    Titanium and Ferrum Separation of a Seaside Titanomagnetite based on Reduction Roasting
    GAO 恩Xia, SUN Ti-Chang, XU Cheng-Yan, LIU Zhi-Guo, LIU Zhen-Zhen, YU Chun-Xiao
    2013, 42(11):  46-48+52. 
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    A seaside titanomagnetite in Indonesia belongs to bench ores with high Titanium-Ferrum and low sulfur-phosphorus. In order to realize high efficient separation of titanomagnetite and achieve full utilization of resources，conditioning tests of reduction roasting process is made by adopting the process of direct reduction roasting - grinding - low intensity magnetic separation. The results showed that under the condition of bituminous coal A usage of 30%，the amount of additive NCS 11%，reduction roasting temperature at 1 250 ℃ for 60 min，grinding fineness of -43 μm 6902%，and low intensity magnetic field strength of 151 kA/m，the reduced iron powder with TFe grade of 93.74%，recovery of 95.91% and TiO2 grade of 0.45% was obtained with high efficient separation of Titanium-Ferrum,the enrichment of titanium in tailings providing prerequisites for its recycling.
    Discussion on Selection of Inhibitor and its Inhibition Mechanism for Reverse Flotation of a Limonite Ore in Xinjiang
    LIU Bao, LIU Miao, SUN Qian-Yu, BI Di
    2013, 42(11):  49-52. 
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    In order to determine a certain kind of effective inhibitor adopted in reverse flotation process of a limonite mine in Xinjiang，the optimum test on the inhibitor of reverse flotation were carried out. The inhibition mechanism of the inhibitor was studied through surveying the surface ζ potentials of limonite under the condition of three different types of amyloid inhibitor. The results indicated that:①Under acidic conditions，the inhibit effect of iron is weakened orderly from sodium carboxymethyl starch，soluble starch to tertiary ammonium cationic starch. Under alkaline conditions，the inhibit effect of iron will be declined from tertiary ammonium cationic starch，soluble starch to sodium carboxymethyl starch. ②Taking sodium carboxymethyl starch with best inhibiting effect as inhibitor，iron ore concentrate with grade of 60.79% and recovery of 79.96% was obtained by adopting the process of one-roughing，two-cleaning，one scavenging and middles back to the flow-sheet in turn. ③The limonite ore with positive surface charges absorbs much sodium carboxymethyl starch(anionic starch) under acidic condition，which is the reason for the excellent inhibit effect on iron in acidic environment; The limonite ore with negative surface charges absorbs much tertiary ammonium cationic starch under alkaline condition，which is the reason for excellent inhibit effect on iron in alkaline environment.
    Experiments of Reverse Flotation of Low Intensity Magnetic Concentrate with Anionic Collector CY-12#
    TANG Xue-Feng, CHEN Wen, LI Wen-Feng
    2013, 42(11):  53-55+59. 
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    The anionic reverse flotation for iron increase and silicon reduction widely adopted by the domestic always needs heating In order to improve the adaptability of reverse flotation collectors to the temperature changes，a new low temperature resisting anionic collector CY-12# was developed by CRIMM，which was used to carry out the temperature adaptability tests of flotation for low intensity magnetic concentrate with iron content of 65.77%,SiO2 content of 861% The results showed that in order to get the similar separation index，the only thing is adjusting the reverse flotation reagent dosage appropriately By adopting the process of one-roughing，one-cleaning and three-scavenging and middles back to the flow-sheet in order，reverse flotation concentrate with Fe grade of 6986%，Fe recovery of 9862% and SiO2 content of 287% was obtained at the temperature of 15 ℃ Compared with that at 30 ℃，Fe grade decreased by 027 percentage point，but its recovery rate increased by 044 percentage point.
    Study on A New-type Lead Depressant for Copper and Lead Separation
    CHI Xiao-Peng, WANG Ji-Zhen, DENG Hai-Bo, YIN Wan-Zhong
    2013, 42(11):  56-59. 
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    Based on floatability characteristic of chalcopyrite and galena in CMC，aluminum sulfate or these two combined suppression system，effect of lead inhibition and copper flotation by aluminum sulfate+CMC in flotation process of a Cu-Pb mixed concentrate from Binzhou was studied. And then，the influence of aluminum sulfate to the absorption of Z-200 on the surface of chalcopyrite and galena was analyzed. The results showed that CMC，aluminum sulfate and these two combined reagents all increased the floatable difference of chalcopyrite and galena. The separation of copper-lead mixed concentrate can be realized with lower cost，less pollution and higher efficiency by firstly adding aluminum sulfate and then CMC. Hence，aluminum sulfate+CMC is recommended as new-type Pb depressant in copper-lead separation.
    Beneficiation Test of a Low grade Copper-Lead-Zinc Sulfide Ore in Shaanxi
    LI Fu-Lan, HU Bao-Shuan, SUN Yun-Li, LIU Bao-Shan
    2013, 42(11):  60-63. 
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    According to the ore properties of a low grade copper-lead-zinc ore from Shaanxi, the paper adopted the principle flowsheet of copper-lead part-bulk flotation，with the Zn inhibitors T80 and collector ester-12 for copper-lead flotation and Pb depressant T81 developed by Northwest Research Institute of mining and metallurgy as key reagents. Through study on ore mineral processing experiment，the results show that the process of one roughing three cleaning one scavenging for copper-lead mix-flotation, one roughing one cleaning one scavenging for copper-lead separation, one roughing two cleaning one scavenging for zinc flotation and middlings returned in order to the flowsheet is adopted to treat the ore. The copper concentrate with Cu grade and recovery of 28.96% and 63.71%, associated Ag grade and recovery of 980.84 g/t and 17.95%,Lead concentrate with Pb grade and recovery of 45.37% and 81.87%, and associated Ag grade and recovery of 689.96 g/t and 36.05%, and Zinc concentrate with Zn grade and recovery of 50.44% and 89.36% were separately achieved.
    Research on Improving Beneficiation Index of a Low-grade Copper-nickel Ore in Hunan Province
    SHI Wei-Hong, WU Bin, ZHOU Tao
    2013, 42(11):  64-68. 
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    The recovery rate of copper-nickel mixed concentrate in a low-grade copper and nickel ore on-site of Hunan is low On the basis of process mineralogical study and field test results，the paper focuses on researches the ore grinding fineness， reagent system and optimization of the flow-sheet processUnder less changing of on-site process and reagent regime， copper-nickel mixed concentrate with Cu grade and recovery of 465% and 8648%， Ni grade and recovery of 364% and 7506% were obtained In comparison with the field production index， copper recovery rate is increased by 311 percentage point，nickel recovery rate is increased by 461 percentage point with the concentrate quality improved slightly.
    Optimization of Beneficiation Process for a Silver-Copper Polymetallic Ore in Fujian
    GAN Yong-Gang
    2013, 42(11):  69-73. 
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    Due to low copper grade in a silver-copper polymetallic ore in Fujian，a single silver floatation process was used to produce silver concentrate while obtaining gold and copper as associated elementsHowever，the pricing rate of copper is only 01，since copper has great detrimental effects on cyanide leaching process of gold and silver，which also influence the pricing rate for gold and silver Hence，the process consisting of partial copper priority speed flotation in combination with gold-silver bulk flotation process was conducted in order to improve the economic benefits for mine and metallurgy plants and provide basis for the further technology improvement and process transformation The results showed that the economic values of gold，silver and copper were significantly increased by adopting the process flow-sheet of the copper speed flotation of one roughing and two cleaning and the silver flotation of one roughing，one scavenging，and two cleaning,under the mesh grinding of on-site Copper concentrate with Cu，Au and Ag grade of 2203%，3221 g/t，and 2 36000 g/t and recovery of 4651%，3221%，and 1254%，were obtained respectively Meanwhile，silver concentrate with Cu，Au and Ag grade of 149%，412 g/t，and 1 23600 g/t，and the recovery of 4023%，5269%，and 8401% respectively were achieved respectively.
    Optimization of Floatation Reagents for Rare Earth Ore in Dressing Plant of Bayan Obo Rare Earth Ore
    WANG Jie-Liang, CAO Zhao, LI Jie, LI Bao-Wei, CHENG Jian-Zhong, LIU Zhan-Quan
    2013, 42(11):  74-76+80. 
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    Due to effect of the activation of metal ions on gangue minerals in Bayan Obo rare earth dressing plant，the flotation process of one-roughing and two-cleaning can not form a closed-circuit flow-sheet，leading to an unfavorable flotation index (middles return makes the flotation system difficult to keep stable). In order to solve the problems of poor stability in production process and undesirable production index，optimization tests of reagents for the on-site rare earth floatation were made. The results showed that the combining inhibitors of citric acid and sodium silicate of gangue minerals can effectively eliminate the activation of metal ions on gangue minerals; With the usage of citric acid and sodium silicate at 200 +1 500 g/t，rare earth concentrate with ReO grade of 51.32% and recovery of 70.94% was obtained by adopting the process of one-roughing，two-cleaning and middles back to the flow-sheet in turn. Compared with on-site index，ReO grade and recovery rate were increased by 1.32 percentage point and 15.91 percentage point respectively.
    Research on Flotation of a Low Grade Copper-molybdenum Ore with a New Collector Instead of Kerosene
    LI Cai-Qin, SUN Chun-Bao, LI Shao-Ying, ZHEN Chun-Hong, WANG Pei-Long, LIU Xing-Gang
    2013, 42(11):  77-80. 
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    The dressing plant of a low-grade porphyry copper molybdenum in Inner Mongolia adopts kerosene as collector of molybdenum minerals to make the copper molybdenum mixed flotation But the flotation indexes are not ideal，and the kerosene procurement is extremely difficult and the price is high，which seriously affected the production and the improvement of economic benefits To solve these problems in production，a new American collector is adopted to replace the original flotation reagents for mineral processing conditions research The results show that with MO+CO-47 as collector of Cu-Mo mixed flotation，Cu-Mo concentrate with Cu and Mo grade of 1970% and 0339%，and Cu and Mo recovery of 8602% and 7690% were obtained separately by the same process above Compared with the on-site result，Cu and Mo grade is increased by 145 percentage point and 0009 percentage point and the Cu and Mo recovery is increased by 706 percentage point and 1005 percentage point respectively Hence，the desired effect of cost reduction and high efficiency can be realized by adopting MO+CO-47 instead of the original collector 105+ kerosene.
    Experiments of Flotation of A Low-grade Porphyry Copper-molybdenum Ore in Inner Mongolia
    ZHEN Chun-Hong, SUN Chun-Bao, LI Shao-Ying, LIU Xing-Gang, LI Cai-Qin, WANG Pei-Long
    2013, 42(11):  81-83+87. 
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    The composition of a low-grade porphyry copper-molybdenum ore mineral in Inner Mongolia is complex，and the valuable minerals are mutually embedded in raw and unevenly grain size In order to utilize the minerals，beneficiation tests on the ore are made by adopting the process of stage grinding and stage bulk flotation The results showed that copper-molybdenum mixed concentrate with Cu，Mo and Au grade of 2020%，0797% and 2030 g/t and Cu，Mo and Au recovery of 8842%，8039% and 7475% were achieved respectively by the process of one-stage grinding，bulk flotation of one roughing and three scavenging，regrinding of mixed coarse concentrates，one roughing-three cleaning-three scavenging，and middles back to the flow-sheet in turn.
    Study on the Leaching Behaviror of Sulphuric Acid of Indium from Synthesis Indium-bearing Zinc Ferrite
    ZHANG Lin-Ye, MO Jia-Mei, LI Xuan-Hai, LIU Xiao-Bin, YANG Jing-Fang, PAN Liu-Ping, LIANG Xin-Yuan, WEI Guang-Tao
    2013, 42(11):  84-87. 
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    In order to provide reference for efficiently recovery of indium from Indium-bearing zinc ferrite，the processing conditions for leaching of synthesis indium-bearing zinc ferrite in sulphuric acid and its leaching kinetics model were studied with the indium leaching rate as index. The results showed that IBZF within range of 0.150 ~ 0.045 mm in particle size had little effect on indium，but leaching temperature，leaching time and stirring speed greatly impacted on leaching rate of indium. The ideal leaching temperature is 85 ℃，leaching time is 60 min，and stirring speed is 300 r/min. The indium leaching reaction of IBZF in sulfuric acid fits the un-reacted shrinking core model with the apparent activation energy Ea of 53.555 kJ/mol.
    Evaluation Methods on Corrected Hydration Activity in Preparation of Active MgO with Calcined Magnesite
    ZHU Jing, YE Nan, YANG Jia-Kuan
    2013, 42(11):  88-91. 
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    Hydration rate is a key index for evaluating the active level of MgO in preparation of active MgO with calcined Magnesite. But it is only suitable for the calcined product with impurity content of less than 2%. With depletion increasing of high-quality magnesite resources，and in order to adjust to the exploration of the high impurity of magnesite，the concept of the corrected hydration rate is proposed. Taking a magnesite ore from Liaoning Haicheng as raw material，the technical conditioning tests for the preparation of active MgO by calcination were studied. The results showed the corrected hydration rate can more objectively and accurately reflect the activity of MgO in calcine process than the hydration rate. This conclusion is coincide with the XRD，SEM analysis of the calcined product and its hydrates.
    Study on the Performance Evaluation Method of Geological Survey Project and its Application
    吕Xiao-Lan , WANG Wen, CHEN Yuan-Xu, MA Shu-Yu
    2013, 42(11):  92-94+99. 
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    Based on summarizing the three-stage practice and exploration of performance evaluation of geological survey project in China，various types of performance evaluation for different purposes are proposed: for reflecting the role and contribution of the geological survey project; for increasing the internal management of the geological survey project; for monitoring and decision-making of the geological survey projectAnd the characteristics of the various types of performance evaluation are briefly describedFrom the aspect of three changing ideas，two evaluation systems，and four evaluation steps，the methods and procedures of performance evaluation for the purpose of internal management are highlightedAt last，the conclusions are pointed out: the performance evaluation should be taken as a key measure for the management of geological survey project; the methods and index system of geological survey project performance evaluation should be further improved; and the performance evaluation，technical review，and budget review of geological survey project should be integrated.
    The Geogas and Soil Geochemical Characteristics of Pb-Zn Deposit in
    DING Xi-Tong, ZHOU Si-Chun, ZHAO Chun-Jiang, ZHAO Feng, LIU Guo-An, LIU Jun
    2013, 42(11):  95-99. 
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    College of Nuclear Technology and Automation Engineering，Chendu University of Technology Based on geogas and soil characteristics of No56，0，39 exploration line，there generally exists the anomaly of Pb，Zn，Cu，Au in the area，among which Pb，Zn anomaly are the most obviousThe geogas and soil anomaly of Pb，Zn overlapped well in the area which the ore has founded，anomaly of Cu，Au is also obvious but with some differences，and accompanied by anomaly of As，La，Sr，etalThe distribution area of the No18 fault which the ore has not found，shows that the geogas anomaly of Pb，Zn is obviousAlthough the soil anomaly is weak，but there is obvious difference with the abnormal area，it may be due to the thicker degree of surface coverage，and accompanied by varying degree of Cu，Au anomaly and also a certain As，Sb，Bi anomalyThe analysis shows that geogas and soil anomaly are in well overlapThere has great potential to seek for copper or copper-lead-zinc ores in the distribution area found，and also has great potential to seek for lead-zinc-copper gold deposit in the North West of the No.18 fault zone.
    Application of Ultra-High Density Resistivity Method in Detection of Water Level of Tailings Reservoir
    ZHAO Kui, WU Yue-Sheng, GAO Zhong, WANG Ming
    2013, 42(11):  100-102. 
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    The ultra-high density resistivity method was applied to detect the water level of tailing reservoirBased on this，it is proposed that the water lever of tailing reservoir is determined according to the actual changing rate of electronic resistivityThen the water level obtained is compared with the actual result by the field drillingThe result shows that the detected result is basically in line with the actual water level measured through the field drilling，which provides a new method for the water level measurement of tailing reservoirs.
    Variance Analysis on The REE Features of Different Gold Deposits in North and South Areas of China
    WU 二, CHEN Yuan-Rong, 蓝Ni-La , LU Yue-Ling, ZHOU Feng, ZHANG Guan-Qing, LIAO De-Hao, LIN Li-Bao
    2013, 42(11):  103-105+109. 
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    In order to investigate the differences of gold deposits metallogenic characteristics in north and south areas of China，using the tracer ability of rare earth elements，the paper analyzes statistically the REE features of different gold deposits in north and south ChinaThe results show that there is a significant difference for total amount of rare earth elements in different parts of the gold oreThe highest is in Jinshan gold mine of Jiangxi province，with the total amount of REE 16639×10-6，while the lowest is in Wulaga gold mine of Heilongjiang province，with ∑ REE of 347×10-6，which concluded that the depth of ore-forming materials of gold deposits in different regions is not the same; Most of the gold deposits exhibit significant enrichment of light rare earth elements(LREE)，the fractionation between HREE and LREE is higher，and the curves of REE distribution tilted to the rightBut the REE patterns is more gentle in the gold mine of Yangzhaiyu in Henan province and Wulaga in Heilongjiang province，and the fractionation between HREE and LREE being not pronouncedHeilongjiang Wulaga and Liaoning Baiyun gold deposits have Eu positive anomaly while the remaining gold deposit gold deposits have Eu negative anomalyThe reasons for these may be that different deposits have different metallogenic environment .
    The Comparative Research of Traditional Method and Geo-statistics Method in Mineral Resource/Reserve Classification
    TANG Pan, TANG Ju-Xing, TANG Xiao-Qian, LIN Bin, FANG Xiang
    2013, 42(11):  106-109. 
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    Based on Micromine software，the paper summarizes the specific process of the traditional method and the geostatistical methodThrough comparative analysis on two typical deposits and reserves estimation results with two kinds of methods，it is considered that the geostatistical method is significantly superior to the traditional method with representative of the geological ore block method，the parallel section method，since it takes into account the level of engineering control，involves the kriging estimation variance，and also can realize the automationSo，tt can be directly applied in mining scheme.
    Design of Information Collection and Processing System on Surface Refined Mining
    REN Gao-Feng, ZHANG Sa-Sa, ZHAO Li-Kun, ZHANG Shi-Xiong
    2013, 42(11):  110-113+127. 
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    The system of surface refined mining was proposed，based on principles of refined productionWith the use of virtual instrument and database，a collection and processing system of the surface refined mining with integration of safe production process information，hazard signal monitoring data and pre-warning decision and command module was builtThe system consists of sensors，signal conditioners，date acquisition cards and PC，and the software design adopts LabVIEWThe extensible acquisition module was used for data collection and transmission; so that real-time monitoring on production process，data sharing and safety monitoring can be realized in surface mineAccording to the research results，it is expected that the traditional extensive open pit mine mining model be improved and the open-pit refined mining system be further enriched.
    Study on Protective Airtight Door in Underground Emergency Refuge System
    PENG Ran
    2013, 42(11):  114-118+122. 
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    The protective airtight door，one of the underground emergency facilities，is mainly introduced and its structure，working principle and materials selection are described in detail and analyzed with the finite element methodAfter testing and demonstration，the finding is that the protective airtight door is safe and reliable.
    Discussion on 20~1 000 kHz Ultrasonic Guided Wave in the Anchoring Quality Inspection
    LIAO Lin, ZHANG Chang-Suo, LIU Ming, ZHANG Sheng-Li, WANG Yin-Tao
    2013, 42(11):  119-122. 
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    In order to apply the technology of Ultrasonic NDT in the Anchoring quality testing，this paper did a research in the propagation of the Guided wave in the bolt，using the method of theoretical analysis and laboratory testingIn 20~ 1 000 kHz guided wave frequency range，the quality of different anchoring bolt were swept，and the group velocity vsfrequency was obtained according to the experimental resultsThe research shows that，at lower frequency，the group velocity of the same frequency guided wave is not the same in the different quality anchor bolt propagation，and it can be used for the anchoring quality testing; while at higher frequencies，their group velocity is almost the same，and it can be used to detect the length of the anchor boltBut there exists some guided wave that can test anchoring quality.
    Effect of the Geometric Features of Assembled Magnetic Media on Performance of High Gradient High-intensity Magnetic Separation
    LI Wen-Bo, TANG Yu-He, HAN Yue-Xin, YUAN Zhi-Tao
    2013, 42(11):  123-125. 
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    Rod media which is widely used in high gradient high intensity magnetic separator owns features of high gradient magnetic field and large surface adsorption in separation. The teetch plate has characteristics of high intensity magnetic induction and high gradient magnetic cusps field. A new kind of profiled assembled magnetic media is designed. Contrastive experimental researches between the rod media and the profiled media with equal gap same wire diameter and equal gap different wire diameter are carried out. The results show that compared with the rod media，the profiled media is more benefit to recovery of fine iron minerals. Also，it can decline the lower limit of particle size suitable for target minerals.
    Lightning Protection Design of Online Monitoring System of Tailing Pond
    SU Jun, ZHANG Da, HAN Zhi-Lei, LI Chun-Feng, LI Peng-Wei
    2013, 42(11):  126-129+134. 
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    The paper expounds the main contents of lightning protection design of tailing pond's online monitoring system，of which general plan design，classification method and earthing grid design are discussed in detailSeveral common problems in lightning protection design are proposed.
    Regional Landslide Risk Assessment of Muchuan County as s Case Based on
    ZHOU Guang-Hong, PEI Yong-Jun, WU Cai-Yan
    2013, 42(11):  130-134. 
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    Taking the landslide disaster risk assessment in Muchuan county as an example，six factors of formation lithology，elevation，topographic relief，exposure factor，profile curvature，plane curvature were selected as the landslide disaster hazard assessment factors，and four factors of population density，forest density，cultivated density，landslide disaster density were selected as the landslide disaster vulnerability assessment factors The contributing weight model was used to obtain the self-weight and inter-weight of assessment factors after dealing with the transformation of contribution rate and weight，and then multiplied with the two weights and index value to get the vulnerability and risk of regional geological disasters The geological disaster risk zoning can be obtained by multiplying the results of vulnerability and risk The conclusion is that it is feasible to build the disaster risk assessment model with the contributing weight model The extremely highest geological disaster risks zone is less，which is mainly distributed in the territory of Haiyun town The higher disaster zone is mainly distributed in the territory of Wusheng town The high disaster zone is mainly distributed in the territory of Huangdan town，Jianban town，Jianhe town and Yongfu town.
    Mine Geo-environment Assessment on Metal-mining Concentration District in Panxi Area
    XIAN Wei, WU Jin-Hui, SUN Xiao-Fei, XIANG Zhi-Ying, SHAO Huai-Yong
    2013, 42(11):  135-138. 
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    Nowadays，“3S” technology has become one of the most favorable means to study the surface resources Based on “3S” technology，with the use of the remote sensing date extracted from high-resolution IKONOS images and other data，the remote sensing，geological，geographic and meteorological data were obtained By adopting the With the information provided by the data in Panxi rift valley metallegenic belt，the mine geo-environment assessment model is built with the analytic hierarchy process to evaluate the mine geo-environment of the studied area The evaluation results indicate that the overall mine geo-environmental quality in study area is unsatisfactory:①Mining activities damage the landscape seriously，and occupy a large amount of land and having no ecological restoration after the exploitation of mineral resources②Mining activities lead to many large-scale geologic hazards and a number of hidden dangers③There are many copper tailing，iron tailing，lead-zinc tailing and other mine tailings in study area，which easily results in surface water pollution once washed by rain.
    煤矿|安全投入|灰色关联度|Matlab|优化
    XU Qiang, WANG Ru-Kun, WANG Xing-Fa, LU Yu-Shi
    2013, 42(11):  139-142. 
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    China Electric Power Design Institute of China Power Engineering Consulting Group On the basis of gray correlation degree analysis of safety investment and security benefits in sub-division of coal mine，the bi-objective optimization model of minimum security costs and maximum safety degree is established With a case，the model maximizes the effectiveness of limited investment within security level It provides a reference for decision-making of safety investment in coal mine.
    Study on Wasteland Remediation Planning for Parts of Yeshan Iron Area
    WANG Jing
    2013, 42(11):  143-145+149. 
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    Based on the problem of mining wasteland reuse highlighted day by day，and taking parts of Yeshan iron area as the research object，the wasteland remediation design scheme is proposed from the situation of mining environment and some technologies，such as slope cutting，ditch intercepting and retaining wall on slope are adopted Eventually，geological disaster risks existing in mine will be eliminated，mine heritage be effectively protected，and the damaged or abandoned land resources can be made full use All these promote the landscape reconstruction of mine wasteland.
    Study on Activity Rules of Mining Shock in Deep Downhill Pillar Region
    LIU Zhen-Jiang, MOU Zong-Long, DOU Lin-Ming, WANG Hao, WEN Ying-Yuan
    2013, 42(11):  146-149. 
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    Based on several rock-burst behaviors during tunneling of 9th return-air roadway in -1025 west downhill mining area，the activity rules of mining shock in the downhill pillar region are analyzed with SOS micro-seismic monitoring systemThe results indicate that the energy level continuously rises while the number of tremors level also increases or maintaines at a higher level before the rock-burst happens; Mine shock obviously concentrates along the downhill direction，and mainly distributed in two overlying key stratums and the high static stress and strong mining shock disturbance is the main reason for rock-burst; The rock-burst strong mining shock omen signal shows a low frequency and high amplitude characteristicsControlled weakening treatments of mining shock including large diameter borehole，floor pre-split blasting and optimized support methods are applied on the basis of monitoring results with good effects achieved in-site.
    Evolution Characteristics of “Organic Carbon” in Coal Mining Subsidence Wetland with High Groundwater Level
    QU Jun-Feng, ZHANG Shao-Liang, LI Gang, XU Zhan-Jun
    2013, 42(11):  150-153. 
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    According to contrast analysis of organic carbon density samples of soil from different areas in Jiuli coal mining of Xuzhou，the organic carbon pool in subsidence slope area appeared a significant loss，however carbon sinks function is significant in the mining subsidence water area It provides a basis for protecting the carbon sinks function in ecological reclamation of coal mining subsidence area .
    Tailings Dam Stability Affected by Saturation Line under the Blasting
    吕Shu-Ran , WANG Ji-Fei, DONG Hua-Xing
    2013, 42(11):  154-157. 
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    Based on the measured blasting vibration data of the mine stope and the actual tailings' operation，the finite element model to study the saturation line's effect on tailings dam's stability is built，and the influences of the stope blasting vibration to tailings dam's anti-sliding safety factor are researched under different elevation of saturation line and different stope blasting vibration intensity The research shows that the anti-sliding stability factor of the tailing dam is significantly influenced by the elevation of saturation line The higher the elevation of saturation line is，the lower the anti-sliding stability factor is For a tailings dam with normal elevation of saturation line，the anti-sliding stability factor increases with the increasing of vibration intensity when the blasting vibration intensity is between 0~0333g，and the anti-sliding stability factor almost decreases linearly when the blasting vibration intensity is greater than 0033g The anti-sliding stability factor' function of blasting vibration intensity is fitted by Matlab to gain their relationship For the ill-tailings dam and danger tailings dam caused by high elevation of saturation line，the anti-sliding stability factor is more significantly affected by the elevation of saturation line，and even linearly decreased.
    Research of Vanadium Extraction from Vanadium-bearing Intermediate Slag Mixed into Tailings with Sodium Roasting
    LI Xiu-Min, ZHANG Yi-Min, HUANG Jing, LIU Tao, BAO Shen-Xu
    2013, 42(11):  158-160+163. 
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    To solve problems in vanadium recovery with high efficiency and low consumption from vanadium-extracted tailings，taking vanadium slags from a steel company as raw material，vanadium-bearing intermediate slag was concentrated by adopting the process of the acid leaching of vanadium-extracted tailings and vanadium deposition with acid leaching solution，and then the influence of the amount of intermediate slags mixed into tailings to the sodium roasting with vanadium-bearing slag and water leaching rate of vanadium was studied. The mechanism of generating this law was discussed. The results showed that the vanadium-bearing intermediate slag replacing the vanadium-extracted tailings back to the process of vanadium extraction with sodium roasting could decrease the decomposition temperature of vanadium-bearing spinel，and reduce the degree of sintering on roasting slag. It also makes the oxidation of vanadium and promote the reaction of vanadium in vanadium-bearing spinel with Sodium carbonate to generate soluble sodium vanadate more easily,and finally realize vanadium recycling with high efficiency and low consumption.
    Beneficiation of Phosphorus Ore from an Iron Tailing in Hebei
    LI Jun-Wang, GUO Ru-Min
    2013, 42(11):  161-163. 
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    The main phosphorus-bearing mineral in low intensity magnetic separation tailings of an Iron Dressing Plant of Hebei is apatite. Since apatite minerals are enriched obviously in fine or micro-fine particles, and its degree of liberation are well, it has a comprehensive recovery value. In order to improve the comprehensive utilization of resources, and reduce the potential threats of phosphate ore efflux to the environment, flotation tests of phosphorus concentration for on-site iron tailings samples are carried out. The results show that under grinding fineness of -0.074 mm 48%, phosphorus concentrate with P2O5 grade of 34.65%, and recovery of 88.83% is achieved by adopting the process of one-roughing, two-scavenging, four-cleaning and middles back to the flow-sheet in turn.
    Experiments on Concentration of Zn from a Pb-Zn Tailing in Fujian
    XU Fei, 吕Hui-Feng , GUO Wei
    2013, 42(11):  164-166. 
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    There are plenty of sphalerite，pyrite and pyrrhotite in early stage of a Pb-Zn tailing in Fujian. These minerals belong to high-quality secondary resources,and has recovery value.Study on the Zn concentration from representative samples of early tailings were carried out. The results showed that under regrinding fineness of -200 mesh 90% for the sample，Zn concentrate with Zn grade of 45.50% and zinc recovery of 67.05% was obtained by adopting the process of one roughing，three-cleaning，two-scavenging and middles back to the flow-sheet in turn. The reason for difficulty in improving Zn recovery is that there are only 55.92% of Zn existing in floatable Zinc Sulfide，and the remains are in difficult-to-float Zinc salt.