不规则孤岛工作面回采期间应力分布特征分析  

Analysis of Stress Distribution Characteristics During Mining of Irregular Island Working Face

作　　者：周亚菲 王轩 胡建 王鹏 徐昆昆 黄令金 ZHOU Yafei;WANG Xuan;HU Jian;WANG Peng;XU Kunkun;HUANG Lingjin(Korla Jinchuan Mining Co.Ltd.;School of Geology and Mining Engineering,Xinjiang University)

机构地区：[1]库尔勒金川矿业有限公司 [2]新疆大学地质与矿业工程学院

出　　处：《现代矿业》2024年第5期45-48,共4页Modern Mining

摘　　要：为防治不规则孤岛工作面采掘期间因应力集中引起的冲击地压,以二井田煤矿E8104工作面为研究背景,采用GDEM数值模拟软件对E8104工作面回采期间应力分布进行探究,分析受回采影响的工作面应力分布规律及特征。研究结果表明:不规则孤岛工作面开切眼工作后两侧煤柱应力较为集中,受动载影响易诱发冲击地压;回采至首次见方阶段时,两侧煤柱的应力集中程度明显增大,应力值为44.5 MPa,应力集中系数达4.45;回采至二次见方阶段时,E8104右侧的煤柱由于宽度加大,应力水平相对较低,但与E8102采空区之间有明显的应力集中现象,且直角煤柱拐点处的应力值高于邻近位置,应力集中系数高达5.1,开采时应注意采取防冲措施。In order to prevent and control the impact ground pressure caused by stress concentration during the mining of irregular island working face,taking the E8104 working face of Erjingtian Coal Mine as the research background,GDEM numerical simulation software is used to investigate the stress distribu⁃ tion during the mining of the E8104 working face,and to analyze the stress distribution law and character⁃ istics of the working face affected by the mining back. The research results show that the coal columns on both sides of the irregular island face are more concentrated in stress after drilling the cutting roadway,and the rock burst is easily induced by the influence of dynamic loading;when mining back to the first square stage,the stress concentration of the coal columns on both sides increases significantly,with the stress val⁃ ue of 44.5 MPa and the stress concentration coefficient of 4.45. When mining to the second square stage, the right side of E8104 has relatively low stress level due to the increase of width,but there is obvious stress concentration phenomenon between it and E8102 mining area,and the stress value at the inflection point of right-angled coal pillar is higher than that at the neighboring position,and the stress concentration coefficient is as high as 5.1,so more attention should be paid to take anti-shock measures when mining the coal.

关 键 词：地下开采 不规则孤岛工作面 数值模拟 冲击地压 

分 类 号：TD324[矿业工程—矿井建设]