02号煤层蹬空区域可采性研究

Study on the Mineability of the Goaf Area of the No.02 Coal Seam

为了判别屯兰煤矿02号煤层蹬空区域的开采可行性,利用比值判别法、围岩平衡法和数理统计分析法分别计算了02号煤层采动影响倍数、围岩平衡高度、蹬空开采必要层间距,理论判别了02号煤层蹬空区域的可采性;采用FLAC3D数值模拟软件,模拟2号煤层回采后上覆岩层的破坏规律,结果表明:2号煤回采后,02号煤位于2号煤回采后形成的破坏区域内,如果在02号煤被蹬空区域内布置工作面,其危险性大,不具备开采可行性。

In order to determine the mining feasibility of the goaf area of the 02#coal seam in Tunlan Coal Mine,the ratio discrimination method,the surrounding rock balance method and the mathematical statistical analysis method were used to calculate the mining influence multiple,the surrounding rock balance height,and the necessary interval for goaf mining of the 02#coal seam,and the mineability of the goaf area of the 02#coal seam was theoretically determined.The FLAC3D numerical simulation software is used to simulate the failure law of the overlying strata after the mining of coal seam 2.The results show that after the mining of coal seam 2,coal seam 02 is located in the failure area formed after the mining of coal seam 2.If the working face is arranged in the goaf area of coal seam 02,it is dangerous and not feasible to prepare for mining.