摘要
针对平煤十矿采区底板回风下山巷道工程地质条件,通过数值计算研究了深部回风下山底板巷道变形破坏严重的主要原因、跨采前后底板巷道围岩应力场和位移场以及跨采期间巷道围岩变形规律。研究结果表明,原岩应力高、围岩岩性差以及工作面采动影响,是采区回风下山巷道围岩变形失稳破坏严重的主要原因。跨采前巷道底板应力场呈"泡形"分布规律,巷道围岩最大应力集中系数为2~3;跨采后底板巷道围岩应力恢复到原岩应力。跨采期间底板巷道围岩移近量为底板巷道与跨采工作面水平距离L的单调递增函数。研究结论对于实现采煤工作面安全跨采提供了技术支撑。
Aiming at the engineering geological conditions of the floor-roadway in return-air down-dip district in No.10 mine area of Pingdingshan Coal Mine,the main causes of serious deformation and destruction of the floor-roadway in return-air down-dip district,the stress and displacement fields of the surrounding rock before and after mining across the roadway,as well as the deformation law of the roadway during mining were studied by numerical calculation.The results showed that the high stress of original rock,the poor lithology of surrounding rock and the mining influence of working face were the main reasons for the serious deformation and instability of surrounding rock of the floor-roadway in return-air down-dip district.The distribution law of stress field in floor-roadway before mining across the roadway was a bubble shape,the maximum stress concentration factor of surrounding rock was 2~3,and the stress of surrounding rock in roadway would be restored to the original rock stress after mining across the roadway.During the period of mining across the roadway,the amount of surrounding rock movement of floor roadway presented a monotone increasing function of the horizontal distance L between floor-roadway and Mining across the roadway working face.The research conclusion could provide a technical support for realizing safe cross mining in coal working face.
作者
李如波
涂兴子
翟新献
黄广帅
李明远
LI Rubo;TU Xingzi;ZHAI Xinxian;HUANG Guan gshuai;LI Ming yuan(Development Department,Pingdingshan Tianan Coal Co.,Ltd,Pingdingshan,Henan 467000,China;School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo,Henan 454003,China;Huaibei Pingyuan Soft Rock Supporting Engineering Technology Co.,Ltd,Huaibei,Anhui 235000,China)
出处
《矿业研究与开发》
CAS
北大核心
2019年第7期56-60,共5页
Mining Research and Development
基金
国家自然科学基金资助项目(51574110,51674102)
关键词
深部矿井
回风下山
跨采
底板巷道
围岩应力场
Deep mine
Return-air down-dip
Mining across the roadway
Floor-roadway
Stress field of surrounding rock
