杨柳煤矿小陈家断层活化及煤柱留设研究  

Study on Xiaochenjia Fault Activation and Coal Pillar Retention in Yangliu Coal Mine

作　　者：刘梦琪 王来斌[1] 林征 LIU Mengqi;WANG Laibin;LIN Zheng(School of Earth and Environment,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学地球与环境学院,安徽淮南232001

出　　处：《煤炭技术》2024年第5期76-80,共5页Coal Technology

摘　　要：含有断层的工作面开采极易引发断层活化,已经成为煤矿突水防治研究的热点问题之一。根据矿井及采区地质与水文地质条件,借助FLAC^(3D)数值模拟软件,建立三维地质模型。模拟分析了断层带内塑性区、应力以及滑移量随煤柱宽度的变化特征,留设了合理防水煤柱。结果表明:随着煤柱宽度的减小,断层带滑移量不断增加,采空区顶底板破坏区不断扩大,当工作面推进距离断层带30 m时,顶板破坏带与断层带导通,断层带发生活化,易引起突水事故。综合数值模拟和理论公式结果得出断层煤柱合理留设宽度不小于30 m。该研究成果为矿井安全生产及合理留设煤柱提供了参考依据。The mining of working face with faults is easy to cause fault activation,which has become one of the hot issues in the research of coal mine water inrush prevention and control.According to the geological and hydrogeological conditions of the mine and the mining area,a three-dimensional geological model was established by means of FLAC^(3D) numerical simulation software.The variation characteristics of plastic zone,stress and slip in the fault zone with the width of coal pillar are simulated and analyzed,and a reasonable waterproof coal and rock pillar is set.The results show that with the decrease of coal pillar width,the slip amount of fault zone increases continuously,and the failure zone of roof and floor in goaf expands continuously.When the working face advances 30 m from the fault zone,the roof failure zone is connected with the fault zone,and the fault zone is activated,which is easy to cause water inrush accident.Comprehensive numerical simulation and theoretical formula results show that the reasonable width of fault coal pillar is not less than 30 m.The research results provide a reference for mine safety production and reasonable retention of coal pillars.

关 键 词：断层活化 煤柱留设 煤矿突水 数值模拟 理论公式 

分 类 号：TD822[矿业工程—煤矿开采] TD745[矿业工程—矿山开采]