含不同落差断层深部煤层开采围岩稳定性研究  

Study on Stability of Surrounding Rock in Deep Coal Seam Mining with Different Drop Faults

作　　者：詹召伟 王彦敏 高超 王传晨 彭瑞[2] 姜士源 杨学红 ZHAN Zhaowei;WANG Yanmin;GAO Chao;WANG Chuanchen;PENG Rui;JIANG Shiyuan;YANG Xuehong(Xiaoyun Coal Mine,Jining Mining Group Co.,Ltd.,Jining 272000,China;School of Safety Engineering,North China University of Science and Technology,Langfang 065201,China;School of Mine Safety,North China University of Science and Technology,Langfang 065201,China)

机构地区：[1]济宁矿业集团有限公司霄云煤矿,山东济宁272000 [2]华北科技学院安全工程学院,河北廊坊065201 [3]华北科技学院矿山安全学院,河北廊坊065201

出　　处：《煤炭技术》2024年第9期88-96,共9页Coal Technology

摘　　要：随煤炭开采深度不断加大,煤矿隐含断层及其分叉点多等问题愈发严重。以山东某矿井为背景,采用数值模拟和理论分析相结合的研究方法,建立了存在不同落差断层情况下的煤层开采模型,研究了工作面开采超前影响范围与不同落差断层之间的关系。结果表明:随着断层落差的减小,断层对围岩应力分布及变形的影响范围逐渐减小;当回采工作面未穿过断层时,运输巷支承压力呈“V”形分布,回采工作面穿过断层以后,上下顺槽支承压力随着切眼距离的增大逐渐减小,应力集中系数明显降低,上下顺槽应力集中系数均小于2,上下顺槽的应力主要受采动压力的影响。研究结论可为地质状况相似矿井超前支护范围设计提供指导。With the increasing depth of coal mining,the problems of hidden faults and many bifurcation points in coal mines are becoming more and more serious.Taking a mine in Shandong province as the background,a coal seam mining model with different drop faults was established by combining numerical simulation and theoretical analysis.The relationship between the advance influence range of working face mining and different drop faults was studied.The results show that with the decrease of fault drop,the influence range of fault on stress distribution and deformation of surrounding rock decreases gradually.When the mining face does not pass through the fault,the bearing pressure of the transportation roadway is distributed in a"V"shape.After the mining face passes through the fault,the bearing pressure of the upper and lower crossheadings gradually decreases with the increase of the cutting distance,and the stress concentration coefficient is obviously reduced.The stress concentration coefficient of the upper and lower crossheadings is less than 2,and the stress of the upper and lower crossheadings is mainly affected by the mining pressure.The research conclusions can provide guidance for the design of advance support range in mines with similar geological conditions.

关 键 词：高应力 不同落差 断层 数值模拟 超前支护 

分 类 号：TD324[矿业工程—矿井建设]