近距离煤层采空区下掘进探放水技术应用

Technique applicatiion of being detected and removed water in driving face under goaf in close distance coal seams

在近距离煤层采空区下掘进时,由于层间距较小,导水裂缝带受采动影响将发育到上覆煤层采空区,采空区积水将成为直接充水水源,对掘进安全造成威胁,国能神东煤炭集团有限责任公司石圪台煤矿掘进22上102主运巷道掘进期间,通过运用钻探和物探技术,探明了采空区积水位置和积水范围,估算出了采空区积水量,并采用疏放水方式成功放出上覆采空区积水13.77万m^(3),极大地缓解了掘进压力,保证了安全掘进。

Because of the small interlayer spacing,the water flowing fractured zone will develop to the Goaf of overlying coal seam,when driving under goaf of close distance coal seams.The accumulated water in themined-out area will become a direct water-filled source and pose a threat to the safety of tunneling。During the excavation of the 22 upper 102 transporting crossheading of Shendong Shigetai Colliery,the position and range of water accumulation in the Goaf were found out by using drilling and geophysical techniques,and the water accumulation in the GOAF was estimated,the water accumulated in the overlying Goaf is drained out 137,700m^(3)successfully by draining water,which greatly relieves the driving pressure and ensures the safe driving.