长壁工作面采动引起的微震活动分布规律研究  

Study on the distribution of microseismic activities caused by longwall mining

作　　者：陈通[1,2] 王双明 王悦[2] 程关文 CHEN Tong;WANG Shuangming;WANG Yue;CHENG Guanwen(College of Geology and Environment,Xi＇an University of Science and Technology,Xi＇an,Shaanxi 710054,China;Shaanxi Coal and Chemical Technology Institute Co Ltd,Xi＇an,Shaanxi 710065,China;State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China)

机构地区：[1]西安科技大学地质与环境学院,陕西西安710054 [2]陕西煤业化工技术研究院有限责任公司,陕西西安710065 [3]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《采矿与安全工程学报》2018年第4期795-800,共6页Journal of Mining & Safety Engineering

基　　金：国家重点基础研究发展计划(973)项目(2014CB047100;2011CB013503);国家自然科学基金委创新研究群体基金项目(51121005)

摘　　要：以澄合矿区董家河煤矿22517工作面为例,研究微震事件的分布规律及其与工作面顶板岩体分带之间的相互关系。研究表明:1)开采引起微震活动的能量和矩震级符合双峰分布模型;2)工作面附近产生微震事件的能量和矩震级主要分布于第二个峰值范围内(能量在300~10 000 J,矩震级在0.1~0.6);3)在走向方向,开采引起的微震活动主要分布于工作面周围岩体水平分带模型中煤壁支撑影响区和支架支撑及离层区;4)在深度方向,开采引起微震活动主要分布于工作面周围岩体垂直分带模型中弯曲下沉带的下部。Taking No.22517 working face in Dongjiahe coal mine as an example, the distribution of microseismic events and the relationship with roof rocks in the working face are studied. The results show that： 1） The energy and moment magnitude of microseismic activities caused by coal mining are consistent with the bimodal model. 2） The energy and moment magnitude of microseismic events generated nearby the working face are mainly distributed in the second peak range（the energy is in the range from 300 J to 10 000 J, the moment magnitude is in the range of 0.1 to 0.6）. 3） In the mining direction, microseismic activities caused by mining are mainly distributed in the area effected by solid coal, the support and separation area in around the working face. 4） In the depth direction, microseismic activities caused by mining are mainly distributed in the lower part of the strata curve zone in the rock mass around the working face.

关 键 词：微震活动 分布规律 双峰模型 矩震级 能量 

分 类 号：TD323[矿业工程—矿井建设]