高寒矿区湿喷混凝土支护应用研究

金属矿山 ›› 2016, Vol. 45 ›› Issue (10): 21-25.

高寒矿区湿喷混凝土支护应用研究

赵金田¹，朱清云²，石勇³，常晓娜³，常宝孟¹，王鹏^1,3

1.北京科技大学土木与环境工程学院，北京 100083；2.金诚信矿业管理股份有限公司，北京 100089；3.吉林板庙子矿业有限公司，吉林白山 134300

出版日期:2016-10-15 发布日期:2016-11-04
基金资助:
基金项目：“十二五”国家科技支撑计划项目（编号：2012BAB08B02），新世纪优秀人才支持计划项目（编号：NECT-07-0070），国家自然科学基金项目（编号：50774011）。

Application Research of Wet Shotcrete Support in Cold Mining Areas

Zhao Jintian¹，Zhu Qingyun²，Shi Yong³，Chang Xiaona³，Chang Baomeng¹，Wang Peng^1,3

1.School of Civil and Environmental Engineering，University of Science and Technology Beijing，Beijing 100083，China； 2.JCHX Mining Management Co.，Ltd.，Beijing 100089，China；3.Jilin BMZ Mining Limited Co.，Baishan 134300，China

Online:2016-10-15 Published:2016-11-04

摘要/Abstract

摘要： 板庙子金矿地处高寒地区，工程地质条件复杂，围岩破碎，稳定性较差。针对采准、切割巷道以往采用干喷混凝土+管缝锚杆+树脂锚杆的支护方式存在喷浆体开裂、巷道变形及失稳冒落等诸多问题，该矿采用湿喷混凝土代替干喷混凝土，并与树脂锚杆对不良岩体巷道进行联合支护试验研究。通过室内配合比试验研究了3种可选骨料条件下水泥掺量与拌合物坍落度、扩散度和试块强度的关系，确定了最佳配合比；针对高寒矿区湿喷混凝土料浆制备受低温影响，提出了拌合水预加热方案、水泥和外加剂室内保温等温度控制技术措施。现场应用表明：湿喷混凝土工艺的生产效率是干喷混凝土工艺的3~4倍，湿喷混凝土28 d单轴抗压强度达到36.2 MPa，实现了维护巷道稳定性的目的，采用湿喷混凝土代替干喷混凝土支护巷道的综合成本减少了215.65元/m3，技术和经济效益显著。

关键词: 高寒矿区, 湿喷混凝土, 配合比试验, 温度控制

Abstract: The engineering geological conditions of Banmiaozi gold ore in cold mining areas are complicated，and its surrounding rock is fractured and poorly stable.According to application of traditional dry shotcrete + slit wedge tubing blot + resin bolt support method with lots of problems that contains shotcrete cracking，roadway deformation and caving，the wet shotcrete + resin blot support method is used to support weak rock mass roadways at present.The relationships between dosage of cement and slump and flow of fresh shotcrete and strength of hardened shotcrete were studied by mix proportion tests with three kinds of aggregates and the optimal mix proportion was determined.Meanwhile，measures of temperature control that include preheated water，and indoor insulation of cement and reducer are proposed because of the influences of temperature on mixture in cold mining areas.Application in the fields of the mine shows that wet shotcrete is 3~4 times as much as the production of dry shotcrete，the uniaxial compressive strength with curing 28 days is 36.2 MPa，the destination to support steadily underground roadways is achieved and the general costs are reduced by 215.65 yuan per cubic meter by using wet shotcrete in place of dry shotcrete.Overall technique and economic benefits of shotcrete are greatly improved.

Key words: Cold mining areas, Wet shotcrete, Mix proportion test, Temperature control

赵金田, 朱清云, 石勇, 常晓娜, 常宝孟, 王鹏. 高寒矿区湿喷混凝土支护应用研究[J]. 金属矿山, 2016, 45(10): 21-25.

ZHAO Jin-Tian, ZHU Qing-Yun, SHI Yong, CHANG Xiao-Na, CHANG Bao-Meng, WANG Peng. Application Research of Wet Shotcrete Support in Cold Mining Areas[J]. Metal Mine, 2016, 45(10): 21-25.

[1]	韩斌, 姚松, 于少峰, 吴建勋, 李佳梦. 湿喷混凝土可泵性、强度和回弹率的关键影响因素[J]. 金属矿山, 2014, 43(07): 37-41.
[2]	姚高辉, 吴爱祥, 王洪江. 地下矿山大型机械化高效喷锚支护技术应用研究[J]. 金属矿山, 2009, 39(10): 126-130.
[3]	韩斌, 武拴军, 李宏业. 高效机械化湿喷混凝土技术及其在地下矿山的应用[J]. 金属矿山, 2009, 39(05): 23-26.

扫码分享