孤岛工作面侧向顶板结构及切顶卸压技术  

Lateral Roof Structure of Island Working Face and the Technology of Roof Cutting Pressure Relief

作　　者：李辉 宋宇航 毕健成 李强[2,3] LI Hui;SONG Yu-hang;BI Jian-cheng;LI Qiang(China Coal Energy Group Co.,Ltd.,Beijing 100120,China;College of Energy and Mining,China University of Mining and Technology(Beijing),Beijing 100083,China;Engineering Research Center of Green and Intelligent Mining for Thick Coal Seam,Ministry of Education,Beijing 100083,China;Ansteel Group Mining Corporation Limited,Anshan 114001,China)

机构地区：[1]中国中煤能源集团有限公司,北京100120 [2]中国矿业大学(北京)能源与矿业学院,北京100083 [3]厚煤层绿色智能开采教育部工程研究中心,北京100083 [4]鞍钢集团矿业有限公司,鞍山114001

出　　处：《科学技术与工程》2024年第36期15396-15403,共8页Science Technology and Engineering

摘　　要：针对孤岛工作面开采回采巷道受到强矿压作用控制困难的问题,以山西汇能煤业15102孤岛工作面为工程背景,研究孤岛工作面顶板侧向结构及其对回采巷道稳定性的影响,提出采用切顶卸压技术保护巷道。结果表明:孤岛工作面顶板侧向结构可以分为变形移动区与弹性变形区,移动变形区域是发生应力增高的根源,对侧向顶板岩层移动变形区进行爆破切顶,可以减少顶板失稳对回采巷道的冲击影响。利用FLAC3D数值模拟软件,分析多种切顶方案的效果,给出具体切顶参数,明确切顶保护巷道稳定的方案,并进行现场试验。切顶后巷道围岩变形量显著降低,切顶效果良好,为类似孤岛工作面回采巷道的稳定性控制提供了借鉴。Aiming at the island working face mining back to the mining roadway by the strong mining pressure control difficulties,taking Shanxi Huineng Coal Industry 15102 island working face as the background of the project,the island working face roof lateral structure and its impact on the stability of the back to the mining roadway,was studied and put forward to cut the top cutting of the unpressurised technology was proposed to protect the roadway.The results show that the lateral roof structure of the isolated island working face can be divided into deformation and elasticity deformation zone,and the mobile deformation zone is the source of stress increase,and blasting and cutting the top of the lateral roof rock layer in the mobile deformation zone can reduce the impact of the roof instability on the return roadway.Using FLAC3D numerical simulation software,the effects of various roof-cutting schemes were analysed,specific roof-cutting parameters were given,the scheme of roof-cutting to protect the stability of the roadway was clarified,and field tests were conducted.After cutting the top,the deformation of the roadway peripheral rock is significantly reduced,and the effect of cutting the top is good,which provides a reference for the stability control of the back-mining roadway in similar isolated island working face.

关 键 词：孤岛工作面 回采巷道 稳定性控制 切顶卸压 

分 类 号：TD322[矿业工程—矿井建设]