近巷道下部矿体开采对巷道稳定性影响数值模拟分析

Numerical Simulation on the Influence of Underground Ore Boday Stoping on Roadway Stability

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。

Aimed to study the influences on the main roadway when stoping an ore body under the main roadway and upper the original goal in a mine, relevant models were established and the finite element analysis software FLAC^3D was used for numeri- cal simulation. The results indicated that the stoping would lead to stress concentration on the boarder of goaf, with the maxi- mum primary stress of 32 MPa and the minimum of 7 MPa. At the same time, the excavation would cause the displacement of about 0.99 mm on the upper roadway. Thus, it suggested to keep pillars reasonably or take relevant support measures for ensu- ring safe production.