挖金湾煤矿8113工作面地裂缝治理技术研究

Ground Fissure Control Technology in 8113 Working Face of Wajinwan Coal Mine

煤层开采后形成的地裂缝存在导水、漏风的风险,给矿井的安全生产带来了不利影响。通过对挖金湾煤矿8113工作面地质条件和煤层开采后围岩的受力情况进行分析,明确了地裂缝主要分为发育于工作面内部的压应力状态地裂缝和发育于工作面边缘附近的拉应力状态地裂缝。其中,工作面边缘附近的拉应力状态地裂缝的通透性较强,是治理的重点,通过采用“三步”治理法,实现了对该地裂缝的有效封闭,明显提高了工作面的通风效果,为地裂缝的治理指明了方向。

The ground fissures formed after coal seam mining have the risk of water conduction and air leakage,which has a negative impact on the safe production of the mine.Through the analysis of the geological conditions of 8113 working face in Wajinwan Coal Mine and the stress of surrounding rock after coal seam mining,it was determined that the ground fissures were mainly divided into the ground fissures in the compressive stress state developed inside the working face and the ground fissures in the tensile stress state developed near the edge of the working face.Among them,the permeability of the tensile stress state ground cracks near the edge of the working face was strong,which was the focus of treatment.By adopting the"three-step"treatment method,the effective sealing of the ground fissures was achieved,significantly improving the ventilation effect of the working face,and pointing out the direction for the treatment of ground cracks.