随钻测量定向钻进技术在矿井顶板水患治理中的应用研究

Application Research on Directional Drilling with MWD in Roof Water Control

摘要:

西北侏罗系顶板裂隙水害是我国煤矿水害主要类型之一，严重影响了矿井的正常生产，并构成了安全隐患。提出采用随钻测量定向钻进技术施工定向长钻孔进行顶板水探放的治理方案，并对钻进成孔工艺和钻探装备进行了选配。选择红柳煤层3121工作面进行了现场应用，施工的定向长钻孔终孔平均出水量是相邻工作面常规钻孔的269倍，相同疏放周期时放水量是常规钻孔的415倍，成功对2个顶板含水层进行探放并达到安全开采要求，起到超前长距离区域探放顶板水的效果，同时可节约78%工期。现场应用情况表明，随钻测量定向钻进技术在顶板水害防治中具有广阔的应用前景，可为类似矿井提供参考。

Abstract:

Northwest Jurassic roof cracks water is the main type of water disaster of coal mine in China, the roof water seriously influences the normal production and causes hidden dangers for safety. The control scheme of roof water drainage by long directional borehole was put forward by directional drilling technology with MWD to solve this problem, and the drilling technology and drilling equipments have been matched. The test has implemented smoothly in 3121 working face of Hongliu mine, which shows the average water discharging amount of the long directional borehole is 269 times of that of the conventional borehole in adjacent working face, the discharging amount is 415 times of that of the conventional borehole in the same discharging cycle. Drainage was simultaneously carried out in 2 roof aquifers, the safe mining requirements are achieved with drainage effect in the advance long distance regions and 78% construction period being saved. The practice proves that directional drilling with MWD has broad application prospect in the roof water control.