Research and Application of Surrounding Rock Support Technology for Roadway Crossing Fault in Sihe Coal Mine
Aiming at the problems of high difficulty in supporting the surrounding rock,and high possibility of roof fall and flaking of the roadway over the fault broken zone,the optimized support scheme of"pre-injection grouting+anchor ropes and nets+U-beam+sprayed concrete"is proposed on the basis of the original support scheme,which is verified by numerical simulation with the optimization scheme of"pre-injection grouting+anchor rods and rope nets+U-beam+sprayed concrete".Based on the original support scheme,the optimized support scheme of"pre-injection grouting+anchor cable network+U-beam+shotcrete"is proposed,and the effectiveness of the support scheme is verified through numerical simulation.The results of field industrial test show that the optimized support scheme can effectively control the deformation and damage of the peripheral rock of the tunnel across the fault.
fault zoneroadwaysurrounding rock deformationpre-grouting
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