超深矿井软岩巷道锚网索耦合支护技术  

Bolt/steel mesh/anchor coupling support technology of soft rock roadway in ultra deep mine

作　　者：王炯[1,2] 王浩[1,2] 郭志飚[1,2] 张逸龙[3] 崔家森 

机构地区：[1]中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室,北京100083 [2]中国矿业大学(北京)力学与建筑工程学院,北京100083 [3]黑龙江科技大学矿业工程学院,黑龙江哈尔滨150022

出　　处：《煤炭科学技术》2015年第9期12-17,共6页Coal Science and Technology

基　　金：国家自然科学基金资助项目(51404278;51479195)

摘　　要：针对星村煤矿埋深超过1 200 m的巷道围岩出现的大变形破坏问题,综合运用现场调研、室内测试和数值分析等方法对其破坏机理及稳定性控制技术进行了研究。分析得出巷道埋深大、地应力水平高以及铝质泥岩遇水膨胀等是巷道产生大变形破坏的原因,特别是底鼓严重的主要原因;同时指出,对称布置下开放式底板的原支护形式是造成高水平构造应力作用下巷道出现非对称大变形破坏的另一关键因素。根据现场工程地质条件分析,结合耦合支护理念,提出了复合托盘+锚网喷+关键部位锚索+底角锚管的非对称耦合支护技术,数值模拟结果显示新支护能够和巷道围岩实现耦合作用,大幅提高了巷道承载能力,并进行了现场工程应用,监测结果表明新技术对深井巷道围岩大变形控制效果良好。According to large deformation failure problems occurred in surrounding rock of mine roadway with a depth over 1 200 in in Xingcun Mine,site survey,indoor test,numerical analysis and other method were comprehensively applied to study on failure mechanism and stability control technology. The analysis showed that the deep depth of mine roadway, high geostress level, aluminous mudstone swell- ing with water and others would be major causes to have large deformation failure occurred in the mine roadway and to have the floor heave. Meanwhile, the previous support method of open floor under the symmetrical layout would be anther key factor to cause unsymmetrical large deformation failures occurred in the mine roadway under the high level structure stress. According to the analysis on the site engineering geological conditions, in combination with the coupling support conception, an unsymmetrical coupling support technology with the compos- ite pallet ＋ bolt/steel mesh/shotcrete ＋ anchor in key location ＋ anchor pipe in floor corner was provided. The numerical simulation results showed that new support technology could realize the coupling role with the surrounding rock of the mine roadway and could highly improve the loading capacity of the mine roadway. The site engineering application of the new support technology was conducted and the monitoring and measured results showed that the new support technology could have an excellent control effect of large deformation occurred in deep mine roadway.

关 键 词：超深矿井 软岩巷道 破坏机理 耦合支护 

分 类 号：TD353[矿业工程—矿井建设]