大直径救援井动载荷作用下安全透巷距离数值模拟

为了防止透巷作业时地层水和钻井液沿钻孔突然涌入巷道，造成井下被困人员二次伤害，采用ABAQUS岩土数值模拟方法，以山西坪上煤矿3 号煤层巷道地面救援井为例建立模型，研究钻井动力扰动条件下巷道顶板围岩塑变特性规律，优化安全透巷距离。结果表明:动力扰动造成顶板围岩位移变形和塑性破坏，且以钻孔中心呈对称的锯齿形分布；轴向作用力对透巷顶板围岩的影响较大，安全透巷距离取值为16.53 m。模拟结果为优化安全的透巷距离提供了参考，实现了安全高效透巷的目的，为救生舱在救援井中安全下放、提升作业提供了保障。 

Numerical simulation of safe distance through roadway drilling under dynamic load of large diameter rescue well

Aiming at the sudden inburst of formation water and drilling fluid into a roadway along the borehole during through roadway drilling operation, which results in the secondary injury of the trapped personnel, ABAQUS geotechnical numerical simulation method was adopted, the model was established with the surface rescue well of the roadway of No.3 coal seam in Pingshang Coal Mine as an example, the plastic deformation characteristics of the surrounding rock of the roadway roof and the optimization of safe through roadway distance under drilling dynamic disturbance were studied. The results show that the dynamic disturbance caused displacement deformation and plastic failure of the roof surrounding rock, and the distribution of the borehole center was symmetrical zigzag. The axial force had great influence on the surrounding rock of the roadway roof, the safe through roadway distance was 16.53 m. The simulation results provide reference for optimizing the safe driving distance, realizing the purpose of safe and efficient driving, providing the guarantee for the safe lowering and lifting of the rescue cabin in the rescue well.