工作面掘进期间上覆老空水探测与防治

Detection and Prevention of Overlying Goaf Water during Working Face Driving

为探明工作面上方存在老空积水,保证巷道顺利掘进,采用瞬变电磁法对工作面前方100 m范围进行探测。通过数据及结果分析,巷道左前方50~70 m (-50~-30 m)区域内存在明显低阻异常区。通过钻探验证,得出低阻异常区域是13011工作面采空区积水造成的。因此,结合巷道顶底板情况和现场条件,采用定向钻孔技术对13011工作面采空区积水进行疏放,排放老空水10 600 m^(3),各个钻孔涌水量均趋于正常。

In order to prove the existence of goaf water above the working face and ensure the smooth excavation of the roadway,the transient electromagnetic method was adopted to detect the 100 m range in front of the roadway. Through the analysis of data and results, there was an obvious low resistance abnormal area in the 50-70 m(-50--30 m) area in the left front of the roadway.Through drilling verification, it was concluded that the low resistance abnormal area was caused by water in the goaf area of13011 working face. Combined with roadway roof and floor conditions and site conditions, directional drilling technology was adopted to drain the water in the 13011 working face mined area and discharged 10 600 m^(3), and the water inflow of each drilling hole tended to be normal.