近距离煤层群上保护层保护范围的数值模拟  

Numerical simulation for protection scope of upper protective seam in adjacent coal seams

作　　者：杨军伟[1] 艾德春[1] 邱燕[2] 汤铸[1] 

机构地区：[1]六盘水师范学院矿业工程系,贵州省六盘水市553004 [2]贵州理工学院资源与环境工程学院,贵州省贵阳市550003

出　　处：《中国煤炭》2016年第9期36-40,共5页China Coal

基　　金：贵州省高校优秀科技创新人才支持计划(黔教合KY字[2015]510号);贵州省教育厅采矿工程重点学科(黔财教[2013]140号);贵州省教育厅"125"重大专项(黔教合重大专项字[2012]017号)

摘　　要：为了确定近距离煤层群上保护层开采保护范围,运用FLAC3D数值模拟对保护层开挖后的应力进行分析,得出了保护层的保护效果;结合应力卸压保护准则,确定保护层沿走向和倾向的卸压角。结果表明,近距离煤层群上保护层开采后,倾向上卸压角为67.7°,下卸压角为63.5°,走向卸压角为47.7°。通过现场考察,数值模拟分析计算得出的卸压角接近现场考察的卸压角。Aiming at protection scope of upper protective layer in adjacent coal seams, stress in protective layer after excavation was analyzed by using the FLAC3D numerical simulation, the protection effects of protective layer were worked out according to the protection rules of stressrelief, the pressure-relief angles of protective layer in dip and strike directions were determined. The results showed that after upper protection layer extraction of adjacent coal seams, the upper and bottom pressure-relief angles in dip direction were respectively 67.7° and 63.5° and the pressure-relief angle in the strike direction was 47.7°. The pressure-relief angle calculated by the numerical simulation was close to that by the field investigation.

关 键 词：近距离煤层群开采 保护层 被保护层 保护范围 卸压瓦斯 卸压角 数值模拟 

分 类 号：TD713[矿业工程—矿井通风与安全] TD823