近距离煤层群协同机理对下位煤层巷道围岩应力研究  

Research on Synergistic Mechanism of Contiguous Coal Seam Group on Surrounding Rock Stress in Lower Position Coal Seam Roadway

作　　者：刘国艳 刘龙 石磊 贾传宝[1] 李雅禄 张天依 巩佳易 孙耀辉 秦桐 Liu Guoyan;Liu Long;Shi Lei;Jia Chuanbao;Li Yalu;Zhang Tianyi;Gong Jiayi;Sun Yaohui;Qin Tong(Mining Engineering Dept.of Lvliang University,Lvliang,Shanxi 033001;China University of Mining&Technology(Beijing),Beijing 100083;Lijiahao Colliery,CNNE Baotou Energy Co.,Ltd.,Ordos,Inner Mongolia 017000)

机构地区：[1]吕梁学院矿业工程系,山西吕梁033001 [2]中国矿业大学(北京),北京100083 [3]国能包头能源有限责任公司李家壕煤矿,内蒙古鄂尔多斯017000

出　　处：《江西煤炭科技》2024年第4期57-62,共6页Jiangxi Coal Science & Technology

基　　金：国家自然科学基金青年基金资助项目(52104113);山西省研究生教育教学改革项目(2022YJJG305);吕梁学院2023年校级教学改革创新项目(XJJGYB202316);山西省高校教学改革创新项目(J20231336,J20231339)。

摘　　要：针对山西西易煤矿近距离4-1煤层、4^(-2)煤层,上位4-1煤层遗留煤柱对底板应力集中问题,讨论下位4^(-2)煤层巷道布置特征。通过塑性理论计算得出遗留煤柱对底板影响深度为25 m,大于上、下煤层夹层厚度,并计算得出遗留煤柱对底板横向影响范围为33.9~39.9 m。基于FLAC3D数值模拟分析下位4^(-2)煤层三种巷道位置布置方案,得出巷道布置在采空区最有利。综合分析遗留煤柱应力影响范围和数值模拟方案,得出下位4^(-2)煤层巷道外错40 m最为合理,且利于相邻工作面巷道布置。同时,提出采用“工字钢棚+锚杆+金属网”联合支护形式,在掘进和回采期间巷道稳定性较好,能保证正常矿井生产。Aiming at the problem of stress concentration on floor caused by retained pillar of upper coal seam near in Xiyi Colliery,the layout characteristics of roadway in lower coal seam are discussed in the paper.According to the plastic theory,it is concluded that the influence depth of the retained coal pillar on the floor is 25 m larger than the thickness of the upper and lower coal seam interlayer,and the transverse influence range of the retained coal pillar on the floor is 33.9~39.9 m.Based on the FLAC3D numerical simulation,three layout schemes of roadway positions in the lower coal seam are analyzed,and it is concluded that the layout of roadway is most favorable in the goaf.According to the comprehensive analysis,considering the stress influence range of the retained coal pillar and the numerical simulation scheme,the 40 m outer dislocation of the roadway in the lower coal seam is the most reasonable and conducive to the roadway layout of the adjacent working face.The combined support of"i-steel beam,bolt and metal mesh"is also proposed in the paper,which can ensure the normal production of the mine due to the good stability of the roadway during excavation and mining.

关 键 词：近距离煤层群 遗留煤柱 应力集中 采空区 巷道布置 

分 类 号：TD322.1[矿业工程—矿井建设]