综放工作面采后覆岩移动规律及离层空间发展形态分析  

Movement law of overburden rock and development pattern of bed-separation space after mining of fully mechanized caving face

作　　者：王飞飞 WANG Feifei(Jinshengpodi Coal Industry Co.,Ltd.,Jinneng Holdings Group,Jincheng 048000,China)

机构地区：[1]晋能控股集团晋圣坡底煤业有限公司,山西晋城048000

出　　处：《陕西煤炭》2024年第12期90-94,131,共6页Shaanxi Coal

摘　　要：综放工作面大规模开采后容易造成显著的地表沉陷等相关问题,为进一步探究综放工作面采后覆岩运动规律及离层空间发育形态,结合山西晋煤集团晋圣坡底煤业有限公司矿区工程实际情况,以3106工作面为工程背景,采用数值模拟和现场实测两种方法进行综合研究。结果表明,在工作面回采的第一阶段,离层一般可以达到煤层开采厚度的0.31倍,最大可以达到0.58倍的开采厚度;第二阶段分离缝宽度较窄,分离量较小,离层从起裂到达到最大值一般需要20~30 d,相当于工作面推进70~100 m,对应层位高度为200 m。The large-scale mining of comprehensively mechanized working face is easy to cause significant surface subsidence and other related problems.In order to further explore the post-mining overburden rock movement law of comprehensively mechanized working face and the spatial development pattern of the bed-separation,combined with the actual situation of the mining area of the Jingshengpodi Coal Industry Co.,Ltd.,the 3106 working face is taken as a research background,the two methods of numerical simulation and on-site measurement are used to carry out a comprehensive study.The results show that:in the first stage of working face mining,the bed-separation can reach 0.31 times of the mining thickness of the coal seam,and the maximum can reach 0.58 times of the mining thickness;and in the second stage,the separation width is narrower,the separation amount is smaller,and it generally takes 20~30 days for the bed-separation to reach the maximum from cracking,which is equivalent to the advancement of the working face by 70~100 m,and the height of corresponding seam is 200 m.

关 键 词：煤层开采 综放工作面 覆岩 离层 

分 类 号：TD325[矿业工程—矿井建设]