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针对某矿山主要运输巷道下方、老采空区上方矿体回采对主要巷道的影响,通过建立相关模型并利用有限元分析软件FLAC~(3D)进行了数值模拟分析。结果表明,该矿体的回采会使采空区边界部位发生应力集中现象,其中最大主应力值为32 MPa,最小主应力值为7 MPa,同时矿体开挖会使上部巷道产生最大约9.9mm的位移,建议在生产作业时合理留设矿柱或采取相应支护措施以保证安全。
Aiming at the influence of the mining of the orebody above the main transportation roadway and the old goaf on the main roadway in a certain mine, numerical simulation analysis was done by using the finite element analysis software FLAC ~ (3D). The results show that the mining of the ore body will cause the stress concentration in the boundary of the goaf, in which the maximum principal stress is 32 MPa and the minimum principal stress is 7 MPa. At the same time, the ore body excavation will make the upper part of the roadway up to about 9.9 mm displacement, it is recommended that a reasonable stay in the production of pillars or take appropriate support measures to ensure safety.