井下定向钻进技术在矿井老窑水治理中的应用

Directional Drilling Technology Applied to Goaf Water Control in Underground Mine

针对神华宁夏煤业集团公司石炭井焦煤分公司一号井老窑水对二号井安全开采造成的安全隐患问题,通过分析一号井与二号井的边界关系、水力联系,以及现场地质、施工条件,应用具有先进定向功能的井下定向钻进技术,自二号井向一号井上组煤回风上山实施了7个长距离定向钻孔,4个钻孔施工至巷道内且成孔后单孔初始涌水量达到80~130 m3/h,水头压力达到1.8 MPa,疏放水190d后一号井老窑水水头高度下降了6 m。最后针对钻孔与巷道贯通时采空区内淤泥瞬间涌出,造成卡钻、水头压力高导致钻孔施工安全隐患等问题,提出具体的技术解决方案。

According to a safety hidden danger problem from a safety mining in No.2 Mine caused by a goaf water in No.1 Mine of Shitan-jing Coking Coal Mine,Shenhua Ningxia Coal Industry Group,with an analysis on the boundary relation,hydraulic connection between No. 1 well and No. 2 well,site geological and construction conditions,an underground mine directional drilling technology with an advance directional function was applied to the drilling of seven long distance directional boreholes conducted in air return rise of top group seam from No.2 Mine to No.1 Mine and four boreholes was constructed to the mine roadway.After those borehole construction completed,initial water inflow of each borehole was 80~130 m3/h,water head pressure was 1.8 MPa and water head height in the goaf of No.1 Mine was re-duced with 6 m after 190 days of water drainage.Finally,when a borehole was drilling through mine gateway,mud inrush occurred from goaf would cause drilling tools jammed and high water head pressure,which could cause safety hidden danger and other problems in borehole drilling operation,the paper provided certain technical solution plan.