屯兰矿采动L形井层位优选技术与方法

Mining Subsidence L-shape Well Target Formation Optimization Techniques and Methods of Tunlan Mine

根据屯兰矿12408工作面上覆岩层位移变形及卸压区裂隙发育演化规律,分析了卸压区的瓦斯运移储集规律,为采动L形井的层位优选提供了理论依据。利用"三带"理论和高抽巷的设计方法对采动L形井水平段层位进行了精确的定位。L形水平井的工程实践取得了良好的抽采效果,解决了上隅角瓦斯超限问题,在屯兰矿起到了工程示范作用。

According to the overlying strata displacement and deformation and the fracture evolution law in the pressure relief zone in the 12408 working face of Tunlan mine,the gas migration and accumulation law in the pressure relief zone is analyzed.It provided a theoretical basis for optimizing the position of L shape well.Based on the theory of ＂three zones＂ and the design method of high drainage roadway,the horizontal section of L shape well is precisely positioned.The engineering practice of L shape horizontal well has achieved good drainage effect,solved the problem of gas overrun in the upper corner,and played an exemplary role in Tunlan mine.