崩落法分区交界矿体连续开采技术

金属矿山 ›› 2019, Vol. 48 ›› Issue (09): 41-44.

崩落法分区交界矿体连续开采技术

李海英^1,2，任思潼³，丁航行³，赵云峰⁴

1. 武汉科技大学资源与环境工程学院，湖北武汉 430081；2. 河钢集团有限公司博士后科研工作站，河北石家庄 050023；3. 东北大学资源与土木工程学院，辽宁沈阳 110819；4. 西钢集团灯塔矿业有限公司，辽宁辽阳111300

出版日期:2019-09-15 发布日期:2019-10-10
基金资助:
基金项目：“十二五”国家科技支撑课题 (编号：2013BAB02B08)，国家自然科学基金重点项目（编号：51534003）。

Continuous Mining Technique for the Orebody at Sub-regional Intersection under Caving Method

Li Haiying^1,2，Ren Sitong³，Ding Hangxing³，Zhao Yunfeng⁴

1. College of Resoures and Environmental Engineering ， Wuhan University of Science and Technology， Wuhan 430081， China；2. Post-Doctoral Research Center of HBIS Co.， Ltd.， Shijiazhuang 050023， China； 3. College of Resoures and Civil Engineering， Northeastern University， Shenyang 110819， China； 4. Xigang Dengta Mining Co.， Ltd.， Liaoyang 111300， China

Online:2019-09-15 Published:2019-10-10

摘要/Abstract

摘要： 小汪沟铁矿采用分区崩落法，沿矿体延深方向分为上、中、下3个采区同时开采，分区交界部位的采区矿柱受采动应力的长期作用，在距离空区边界15~25 m的范围内，产生了破损程度不等的采动裂隙，由此导致凿岩夹钎，增大了采准工程的施工与回采难度。总结上、中位采区矿柱回采经验，基于散体柱支撑理论，依据采空区冒落线接近于拱形及陷落角内倾的现场监测结果，对临空高度大、承压时间长的中、下位采区矿柱，研究提出钻孔探测空区边界、调整回采顺序与回采进路方向、增大巷道支护强度等综合技术措施，适应采动裂隙条件，使崩落法分区交界难采矿柱得到了安全连续回采。

关键词: 分区崩落法, 交界矿体, 采动裂隙, 安全连续开采

Abstract: The sub-regional sublevel caving method was adopted in Xiaowanggou Iron Mine， which is divided into upper， middle and lower mining areas for simultaneous extraction along the direction of ore body. Under the long-term mining disturbance on pillars at the intersection of sub-region， the mining-induced fractures with different damaged condition were generated within the limits of 15~25 m from the boundary of mined-out area， resulting in the drilling pinching and increasing the difficulty of mining construction and recovery in the quasi-mining project. Summarizing the experience of pillar mining in upper and middle mining areas， based on the theory of loose pillar support， and according to the field monitoring results of the caving line at goaf approaching the arch shape and the inclination of the caving angle， the comprehensive technical measures of detecting the boundary of goaf by drilling， adjusting the mining sequence and the direction of mining approach， and increasing the support strength of roadway are put forward for the pillars in the middle and lower mining areas with high goaf height and long bearing time. These measures adapts to the mining-induced fissure condition， and makes the pillars at the boundary of caving zone safe and continuous mining.

Key words: Sub-regional caving, Intersection of ore-body, Mining-induced fracture, Safe continuous mining

李海英, 任思潼, 丁航行, 赵云峰. 崩落法分区交界矿体连续开采技术[J]. 金属矿山, 2019, 48(09): 41-44.

LI Hai-Ying, REN Si-Tong, DING Hang-Xing, ZHAO Yun-Feng. Continuous Mining Technique for the Orebody at Sub-regional Intersection under Caving Method[J]. Metal Mine, 2019, 48(09): 41-44.