淮南矿区新集二矿1煤地面排水钻孔的设计施工

Design and Construction of No.1 Coal Seam Surface Drainage Hole in Xinji No.2 Coalmine,Huainan Mining Area

新集二矿的主采煤层位于山西组的底部,受到下伏太原组岩溶裂隙含水层的威胁。为缓解井下的防治水压力,采用了在地面施工排水孔的防治水思路。根据钻孔的位置及地层情况,采用了泥浆循环钻进与空气潜孔锤钻进相结合的方法。由于在钻孔施工过程中,发生了泥浆向巷道渗漏的情况,为保证钻孔施工安全及井下生产安全而对钻孔设计深度进行了调整,从而顺利的完成了该孔的钻探施工任务。此孔的成功,可为类似地区施工矿井防治水钻探工程提供借鉴。

The main mineable coal seams in the Xinji No.2 coalmine are in the bottom part of Shanxi formation and threatened from the underlying Taiyuan Formation karst fissure aquifer. To relieve underground water control pressure, surface drainage hole idea has been adopted. According to hole site and strata conditions, combined mud circulation drilling and air DTH hammer drilling were used. During the drilling process, mud leaking to roadways happened, to ensure the safety both in drilling and underground production, the designed drilling depth modified, thus completed the hole construction smoothly. The success of the hole drilling can be a reference to similar area mine water control drilling engineering.