三交河煤矿上组煤层地应力分布特征实测分析

Geo-stress Distribution Characteristic of Upper Coal-seam in Sanjiaohe Colliery

介绍了采用钻孔应力解除法进行地应力测量的原理和方法,并成功应用此种方法在三交河煤矿进行了地应力测试。结果表明:三交河煤矿2号煤层985m水平最大主应力平均6.21MPa,方位角平均为147.13°,最大主应力方向在西北-东南方向;最小主应力平均为3.50MPa,方位角为238.55°;原岩应力以水平应力为主,最大主应力是最小主应力1.71～2.22倍,水平应力具有较强的方向性;中间主应力与垂直应力较为接近,随埋深的增加垂直应力随之增大。测试结果为该矿的生产和巷道支护设计提供了可靠依据。

Principle and method of geo-stress test by bore-hole stress relief was introduced and the method was applied in Sanjiaohe Colliery Results were showed as follows Even value of maximum principal stress of 2nd coal-seam at 985m was 6.21MPa,direction angle was 147.13°,which was northwest-southeast Minimum principal stress was 3.5MPa,its direction angle was 238.55° Horizontal stress was larger than vertical stress;maximum principal stress was 1.71-2.22 times of that of minimum principal stress Medium principal stress was near to vertical stress Vertical stress increased with buried depth adding Test results provided reference for mining and roadway supporting in this mine