地下开采影响下的地表建筑稳定性分析

Stability Analysis of Ground Buildings Influenced by Underground Mining

地下开采必然引起上覆岩体及地表的破坏,进而影响到地表建筑物的稳定性状态。采用经验公式对某矿留存矿柱的安全系数及地表不稳定边界进行了计算,并采用数值方法获取了采空区及地表岩体的应力、应变值,计算了地下开采影响下的地面建筑的倾斜和曲率值。计算结果表明:该矿采空区及地表建筑物目前处于稳定状态。最后根据分析结果,推荐了该矿地下开采的采场结构参数,供矿山生产参考。

The underground mining would cause the damage of overlying rock mass and ground surface, and then affect the stability of ground buildings. The safety factors of retained pillars and the surface instability boundary in a mine were calculated by empirical formula. Besides, the numerical method was used to calculate the stress and strain of goaf and ground rock mass, as well as the incline and curvature of ground buildings influenced by underground mining. The results showed that the goaf and ground buildings were in a stable state. According to the analysis results, the structure parameters of stope in underground mining were recommended, which could be a reference for mine production.