Case study of seismic hazard assessment in underground coal mining using passive tomography
Case study of seismic hazard assessment in underground coal mining using passive tomography
复制标题
使用被动层析成像技术进行地下煤矿开采地震危险性评估的案例研究
DOI：
10.1016/j.ijrmms.2015.05.001
复制
发表时间：
2015-09-01
影响因子：
7.2
通讯作者：
Jing, Guangcheng
中科院分区：
文献类型：
--
作者：
Cao, Anye;Dou, Linming;Jing, Guangcheng
利用超声波技术，首次在实验室规模上研究了外加应力与波速之间的关系。随后，选择了一个位于硬厚岩层下的孤岛长壁工作面，在遭受冲击地压、强震等地震灾害威胁的情况下，进行了被动速度层析成像的实例研究。基于采矿作业期间的连续地震监测，被动层析成像已被用于定位高地震活动区和评估工作面周围的地震危险性。结果表明，高速区和速度梯度区与未来开采期的地震活动有较好的对应关系。此外，随着工作面的后退和关键层的大规模移动，高速区或速度梯度区重新分布。被动速度层析成像技术是一种很有前途的工具，可以连续监测相对高应力区或评估地震危险性的地下煤矿。(C)2015爱思唯尔有限公司版权所有。
The relation between applied stress and wave velocity is examined firstly at the laboratory-scale by using ultrasonic technique. Subsequently, an island longwall face under hard-thick strata, suffering from the threat of seismic hazards, e.g. rock burst, strong tremor, was chosen for a case study of passive velocity tomography. Based on continuous seismic monitoring during mining operation, passive tomographic imaging has been used to locate high seismic activity zones and assess seismic hazard around the face. The results show that the high velocity and velocity gradient regions correlated well with the high seismic activities occurred in future mining period. In addition, the high velocity or velocity gradient regions redistributed with the retreat of coalface and large-scale movement of key strata. Passive velocity tomography can be a promising tool to continuously monitor the relatively high stress zone or evaluate seismic hazard in underground coal mining. (C) 2015 Elsevier Ltd. All rights reserved.