孤岛工作面沿空掘巷煤柱合理宽度探讨

Discussion on The Reasonable Width of Coal Pillar in Gob Side Entry in Isolated Island Working Face

针对孤岛工作面的回采巷道因留设了大煤柱而导致煤炭资源损失,以王坪煤矿8306孤岛工作面回采巷道沿空掘巷为工程背景,采用理论计算判断合理的小煤柱宽度为2.21 m~2.59 m,并通过FLAC3D数值模拟软件确定8306孤岛工作面的侧向支承压力应力降低区为0 m~7 m,结合2306巷设计宽度及矿上的实际情况,最终确定煤柱宽度为3 m。

In view of the loss of coal resources caused by the large coal pillars left in the mining roadway of island working face,taking the goaf side entry driving of 8306 island working face of Wangping Coal Mine as the engineering background,the reasonable width of small coal pillars is determined to be 2.21 m~2.59 m by using the theoretical calculation method,and the range of lateral abutment pressure stress reduction of 8306 island working face is determined to be 0 m~7 m by using FLAC3Dnumerical simulation software,Combined with the design width of 2306 roadway and the actual situation of the mine,the final width of German coal pillar is determined to be 3 m.