摘要
为了得到岩体破裂滑移对巷道围岩(煤柱、煤体及顶板)的影响,以山西潞宁煤矿22117风巷为研究背景,利用微震监测系统对潞宁煤矿22117风巷进行微震监测,得到围岩破裂的微震响应特征并对其进行分析.结合现场实际情况,利用FLAC 3D模拟软件建立三维模型,并进行数值模拟计算,对巷道掘进时顶板稳定性规律进行分析.结果表明:掘进对顶板影响表现为由巷道顶板-煤柱及其上方顶板-煤体及其上方顶板逐渐发展的一个过渡过程;巷道顶板受掘进直接影响的范围为距迎头32.6 m范围内;掘进动力扰动对后方煤柱顶板破裂的微震具有滞后效应,滞后范围约为93.3 m.
In order to get the influence of rock mass fracture slip on roadway surrounding rock(coal pillar,coal body and roof),taking 22117 coal mine in Shanxi Province as the research background,the microseismic monitoring system is used to monitor 22117 air roadway in Luning coal mine,and the microseismic response characteristics of surrounding rock fracture are obtained and analyzed.Combined with the actual situation on site,the 3D model is established by using FLAC 3D simulation software,and the numerical simulation calculation is carried out to analyze the roof rule during roadway tunneling.The results show that the influence of tunneling on the roof is a transitional process in which the roof-coal pillar and its upper roof-coal body and its upper roof gradually develop.The range of roadway roof directly affected by tunneling is within 32.6 m from the heading face.The driving dynamic disturbance has a hysteresis effect on the microseismic of the rear coal pillar roof rupture,with a hysteresis range of about 93.3 m.
作者
吴昊
李青锋
朱川曲
唐佩
WU Hao;LI Qingfeng;ZHU Chuanqu;TANG Pei(College of Resources,environment&Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Institute of Mining Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Hunan University of Science and Technology,Key Laboratory of Gas and Roof Disaster Prevention and Control Safety Production,Xiangtan 411201,China)
出处
《矿业工程研究》
2021年第1期21-29,共9页
Mineral Engineering Research
基金
国家自然科学基金资助项目(51474104)
湖南省自然科学基金资助项目(2018JJ2130)。
关键词
围岩稳定性
微震监测
数值模拟
过渡过程
滞后效应
surrounding rock stability
microseismic monitoring
numerical simulation
transition process
hysteresis effect
