乌东煤矿坚硬岩层注水软化与效果评价研究  

Research on water injection softening of hard rock and its effect evaluation in Wudong Coal Mine

作　　者：杨长德[1,2] 李金波 张伟光[1] 李春阁[1] 王鹏[1] YANG Chang-de;LI Jin-bo;ZHANG Wei-guang;LI Chun-ge;WANG Peng(Xinjiang Institute of Engineering,Urumqi 830023,China;School of Resources and Geosciences,China University of Mining and Technology,Xuzhou 221008,China)

机构地区：[1]新疆工程学院,新疆乌鲁木齐830023 [2]中国矿业大学资源与地球科学学院,江苏徐州221008

出　　处：《煤炭工程》2018年第11期51-53,共3页Coal Engineering

基　　金：自治区高校科研计划项目(XJEDU2016S089);新疆工程学院科研基金项目(2017xgy071910)

摘　　要：为解决急倾斜煤层开采过程近直立顶底板岩层破坏导致冲击地压现象,针对急倾斜岩层的危险性,在其内部开凿工艺巷,采用高压注水方法对岩层进行弱化处理,并采用微震监测和PASAT-M探测手段进行弱化效果的观测和统计。结果表明:高压注水改变了岩体的内部结构,使岩体初始强度降低;微震监测发现注水后岩柱高能事件减少,低能事件增加,能量积累程度降低,减小冲击危险性; PASAT-M探测显示在高压注水的作用下岩体内部高应力区峰值降低,低应力区峰值上升,但总体应力集中系数减小。注水软化对降低直立岩层应力集中具有明显效果,能够有效地缓解或防治直立岩层冲击地压的发生。In order to solve and reduce the impact pressure phenomenon caused by the failure of near-vertical roof rock in the mining process of the coal seam, in view of the danger of the slope rock, the craft lane has been constructed inside the rock, and the high pressure water injection method was used to weaken the rock layer. In the engineering, the microseismic monitoring and the PASAT-M detection method were used to observe and statistics the weakening effect. The results show that high-pressure water injection changes the internal structure of rock mass and reduces the initial strength of rock mass. Microseismic monitoring revealed that the number of high-energy events decreased, the low energy events increased, the energy accumulation decreased and the impact risk decreased. The PASAT-M detections show that the peak of high stress zone in rock mass decreases and the peak of low stress zone increases, but the overall stress concentration coefficient decreases. Water injection softening engineering has obvious effect on reducing stress concentration of vertical rock layers, and can effectively mitigate or prevent the impact of vertical rock formations.

关 键 词：坚硬岩层 注水软化 急倾斜特厚煤层 应力集中 岩层弱化 微震 

分 类 号：TD324.2[矿业工程—矿井建设]