地下开采诱发的地表岩移演化规律及稳定性分析

Evolution Law and Stability Analysis of Surface Rock Displacement Induced by Underground Mining

地下开采容易引起地表沉降变形,从而对地表工业场地及构筑物造成扰动影响。为分析地下开采过程中地表及工业场地的稳定性,以某地下矿为研究对象,利用Midas-FLAC3D耦合仿真手段,进行空场法开采的地表及工业场地的位移变化分析,并结合岩移指标进行地表及工业场地的稳定性评判。结果表明:在空场法开采过程中,该地下矿的地表及工业场地位移及岩移指标未超过安全许可范围,研究结果可为矿山开采时的地表稳定性分析提供参考。

Underground mining is easy to cause surface subsidence deformation,thus causing disturbance to surface industrial sites and structures.To analyze the stability of the surface and industrial site in the process of underground mining,an underground mine was taken as the research object.Midas FLAC3Dcoupled simulation was used to analyze the displacement changes of the surface and industrial site during open-pit mining,and the stability of the surface and industrial site was evaluated in combination with the rock movement indexes.The results show that in the process of open-pit mining,the displacement of surface and industrial site,as well as rock movement indexes of the underground mine do not exceed the safety permit ranges.The research results can provide a reference for the stability analysis of the surface in underground mining.