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选取受动压影响的祁南煤矿82采区五中车场巷道为试验巷道,构建了不等压条件下巷道破坏的力学模型,得出了巷道内表面的位移解;其次根据数值模拟结果,选取锚网索+锚注联合支护方式对82采区五中车场巷道进行支护,并进行了现场观测.结果表明,动压使巷道围岩深部应力向更深处转移,扩大了巷道围岩的塑性屈服范围,加大了巷道围岩变形,严重影响了巷道稳定;锚喷索+锚注联合支护方案能明显提高破碎围岩的整体强度,改善岩体的性质,更好地控制了巷道的变形.
The influence of dynamic pressure on the laneway of No.5 Middle Road in the 82 mining area of Qinan Coal Mine is taken as the experimental roadway. The mechanical model of the roadway under unequal pressure is established and the displacement solution of the inner surface of the roadway is obtained. Secondly, according to the numerical simulation results, Anchor net + anchor and grouting joint support is used to support the laneway of No.5 Middle Road in Area 82 and the on-site observation is carried out.The results show that the dynamic stress causes the deep stress of the surrounding rock of the laneway to shift deeper and enlarge the surrounding rock of the roadway Plastic yielding range, increasing the deformation of surrounding rock roadway, seriously affecting the stability of the roadway; anchor bolt + anchor injection joint support program can significantly improve the overall strength of broken rock, rock mass to improve the nature of the better control of the roadway The deformation.