地面定向钻进技术在导水断层治理中的技术研究与应用

随着煤矿开采,上组煤资源逐渐枯竭,矿井向下组煤延伸。开采下组煤主要的水害威胁为奥陶系灰岩承压水,在煤层带压开采过程中,预防奥灰突水成为下组煤开采过程中水害防治的重中之重,其中导水断层为诱发奥灰突水最主要的导水通道之一。为了有效的封堵由断层产生的导水通道,冀中能源股份有限公司邯郸郭二庄矿采用地面定向钻进结合地面注浆技术,对已探查出的采煤工作面附近的张性断层(F292断层)进行注浆加固改造,最终达到封堵断层导突水裂隙、降低奥灰突水风险的目的。实践结果表明,该项工程的实施有效的对F292断层导水性进行改造治理,实现安全生产。

Technical research and application of surfacedirectional drilling technology in water conductingfault management

With coal mining,the upper group coal resources are gradually depleted and the mine extends to the lower group coal.The main threat of water damage in mining lower group coal is the pressurized water of Ordovician tuff.In the process of coal seam mining with pressure,the prevention of ash water burst becomes the top priority of water damage prevention and control in mining lower group coal,in which the water-conducting fault is one of the most important water-conducting channels to induce ash water burst.In order to effectively seal the water-conducting channel generated by the fault,Handan Guo’erzhuang Mine of Jizhong Energy Group adopted ground directional drilling combined with ground grouting technology to grout and reinforce the tension fault(F292 fault)near the explored coal mining face,finally achieving the purpose of sealing the water-conducting fissure of the fault and reducing the risk of water outburst.The practical results showed that the implementation of the project has effectively transformed the water conductivity of the F292 fault and achieved safe production.