平煤十二矿预埋管疏放老空水技术研究

Study on the technology of draining water accumulated in old goaf by pre-buried pipe in No.12 Mine of Pingdingshan Coal

老空区积水是威胁煤矿安全生产的主要因素之一。平煤十二矿的己_(15)煤和己_(16-17)煤为近距离煤层群,己_(16-17)煤层的工作面开采时受上覆己15煤和本煤层采空区积水影响严重,为了实现对采空区积水的有效疏放,在己_(16-17)-31050工作面开采时,在底板瓦斯抽采巷向己_(16-17)-31050工作面施工了钻孔,预埋了钢套管,直至相邻的己_(16-17)-31030工作面开采时,共计疏放出老空区积水56853 m^(3),保障煤矿的安全高效开采。

Water accumulation in old goaf is one of the main factors threatening coal mine safety production.The Ji_(15) coal and Ji_(16-17) coal in the No.12 Mine of Pingdingshan Coal are close distance coal seams.The working face of Ji_(16-17) coal seam was seriously affected when mining by the overlying Ji15 coal and the water accumulation in the goaf of the coal seam.In order to realize the effective drainage of the water accumulation in the goaf,during the mining of No.31050 Face in Ji_(16-17) coal seam,the drilling was carried out in the floor gas drainage roadway to No.31050 Face in Ji_(16-17) coal seam,and the steel casing was pre-buried.Until the adjacent No.31030 Face in Ji_(16-17) coal seam was mined,a total of 56853 m3 of water accumulated in old goaf was drained,which ensured the safe and efficient mining of the coal mine.