Ground Fissure Control Technology in 8113 Working Face of Wajinwan Coal Mine
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.
coal seam miningoverlaying rockground fissure control
万方数据
维普
