综采工作面过空巷群围岩变形及破坏规律研究  

Study on deformation and failure law of surrounding rock of fully mechanized mining face passing through empty roadway group

作　　者：陈勇 赵瑞 武振 苏丽君 杨峰 孙强[2] CHEN Yong;ZHAO Rui;WU Zhen;SU Lijun;YANG Feng;SUN Qiang(Yankuang Energy Group Company Limited,Jining 273500,China;School of Mines,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]兖矿能源集团股份有限公司,山东济宁273500 [2]中国矿业大学矿业工程学院,江苏徐州221116

出　　处：《中国矿业》2025年第1期154-163,共10页China Mining Magazine

基　　金：教育部与科技部高等学校学科创新引智计划项目“矿山固废处置与利用学科创新引智基地”资助(编号:B21016)。

摘　　要：复杂地质条件矿井煤层无序开采导致大量空巷群遗留,综采工作面过邻近空巷群过程中面临矿压显现规律复杂、围岩控制难的问题。为研究综采工作面过空巷群围岩变形及破坏规律,采用数值模拟方法,研究了南屯煤矿93下21工作面同层空巷、穿层空巷、下伏空巷开采前后围岩位移、应力及塑性区变化规律。结果表明:空巷破坏主要影响因素为空巷与煤层的层位关系、空巷距煤层距离、空巷角度变化。当空巷距煤层小于5 m时,空巷破坏严重,当空巷距煤层大于5 m时,空巷变形逐渐减小,当空巷距煤层大于10 m时,空巷受采动影响较小。空巷拐角处易产生应力集中现象。针对不同类型空巷提出工作面调斜、局部充填、加强支护过空巷措施;实测结果表明,液压支架工作阻力及煤岩体应力较为稳定,空巷围岩控制效果较好。该研究成果可以为类似综采工作面安全通过空巷群提供借鉴。The disordered mining of coal seam in complex geological conditions leads to a large number of empty roadway groups left over,and the problems of complex rock pressure development and difficult surrounding rock control are faced in the process of fully mechanized mining face passing through nearby empty roadway groups.In order to study the deformation and failure law of surrounding rock of fully mechanized mining face passing through empty roadway group,the numerical simulation method is used to study the displacement,stress and plastic zone changes of surrounding rock before and after the mining of the same layer empty roadway,through layer empty roadway and underlying empty roadway in Nantun Coal Mine.The results show that the main factors affecting the failure of empty roadway are the relationship between empty roadway and coal seam,the distance between empty roadway and coal seam,and the change of empty roadway angle.When the distance between the empty roadway and the coal seam is less than 5 m,the damage of the empty roadway is serious.When the distance between the empty roadway and the coal seam is greater than 5 m,the deformation of the empty roadway gradually decreases;when the distance between the empty roadway and the coal seam is greater than 10 m,the empty roadway is less affected by mining.The phenomenon of stress concentration is easy to occur at the corner of empty roadway.In view of different types of empty roadway,the measures of slope adjustment,local filling and strengthening support of empty roadway are put forward.The measured results indicate that the working resistance of the hydraulic support and the stress of the coal and rock mass are relatively stable,and the control effect on the surrounding rock in the empty roadway is satisfactory.The research results can provide reference for similar fully mechanized mining face to safely pass through empty roadway group.

关 键 词：空巷群 围岩变形 数值模拟 过空巷措施 FLAC3D软件 

分 类 号：TD263[矿业工程—矿井建设]