地下开采引起地表沉陷的数值模拟

Numerical Simulation of Ground Surface Subsidence Caused by Underground Mining

地下开采引起的岩层移动和地表沉陷是一个非常严重的地下工程问题。为实现矿山的安全开采,必须对地下开采引起的上覆岩层的移动规律及其对地表移动的影响进行研究。文中以石人沟铁矿为研究对象,运用FLAC软件,采用数值模拟的方法,对石人沟铁矿地表沉陷数学模型的开采过程进行分步开挖模拟,并总结出了地下开采引起的上覆岩层和地表的移动规律,给出了不同开采阶段的地表动态移动曲线。

The strata movement and the ground surface subsidence caused by underground mining are serious underground engineering problems. In order to realize safety mining of mine, it is necessary to research on the overlying formation＇s movement rule caused by underground mining and its effect on the ground surface movement. Taking Shirengou Iron Mine for example, the step digging stimulation of mining procedures of the ground surface subsidence＇s mathematic model is researched by the FLAC software and the numerical simulation method in this paper. The overlying formation and the ground surface＇s movement rule caused by the underground mining is summarized, and the moving curves of ground surface dynamic state in different mining stages are given.