煤矿顶板岩体微震分布规律研究及其在顶板分带中的应用——以董家河煤矿微震监测为例  

Research on the partitioning method of the overburden in coal mine based on microseismic monitoring

作　　者：程关文 王悦 马天辉[2] 唐春安[2] 陈通 马克 

机构地区：[1]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 [2]东北大学资源与土木工程学院,辽宁沈阳110819 [3]陕西煤业化工技术研究院有限责任公司,陕西西安710065 [4]力软科技(大连)股份有限公司,辽宁大连116600

出　　处：《岩石力学与工程学报》2017年第A02期4036-4046,共11页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点基础研究发展计划(973)项目(2014CB047100);国家自然科学基金资助项目(41572249)~~

摘　　要：近年来,微震监测在煤矿中得到大量应用。通过对煤矿采动影响微震区微震事件的空间和能量的空间分布规律分析,研究微震事件数沿垂直方向的突变性,进而确定煤矿顶板对变形和破坏其控制作用的关键层。基于关键层是顶板2个分带的分界线的学术思想,以董家河煤矿22517工作面为例,对煤矿顶板沿垂直方向的分带模型进行研究,并和钻孔观测法所得的结果进行对比,得到以下结论:将22517工作面顶板岩体分带分为6带—垮落带,岩块区域,垂直裂缝贯通区域,垂直裂缝带,离层带和弯曲下沉带,其中岩块区域和直裂缝贯通区域组成了传统分带模型中的裂隙带,垂直裂缝带,离层带和弯曲下沉带组成了传统分带模型中的弯曲下沉带。从而加深人们对煤矿顶板岩体变形、破坏的认识,为煤矿顶板分带高度的确定提供新的方法和思路。In recent years,microseismic monitoring has been widely used in coal mine.Based on the analysis of the distribution of microseismic events space-time and energy,the mutation of microseismic events were studied in order to determine the key layer of coal mine roof deformation and failure of the control action along the vertical direction.Based on the academic of the key layer of roof was divided two boundaries,taking Dongjiahe coal mine 517 working face as an example,the model of coal mine roof was studied along the vertical direction,And the borehole observation method was compared with the results,the conclusion as followed：The 517 working face roof rock mass is divided into six zones,including caving zone,rock zone,vertical cracks,vertical cracks,bending zone and separation zone.The fractured zone was composed with block zone and vertical cracks zone,bending subsidence zone was composed with vertical fracture zone,bending zone and separation zone.The new methods and ideas were provided for the height of divided coal mine roof.

关 键 词：采矿工程 微震监测 煤矿开采 顶板分带 裂隙带 

分 类 号：TD32[矿业工程—矿井建设]