煤矿采空区地表变形评价中的数值模拟分析

Numerical Simulation Analysis in Evaluation of Coal Mine Goaf Surface Deformation

采空区的地表变形评价是煤矿灾害评价中的关键问题之一。目前主要是利用《建筑物、水体、铁路及主要井巷煤柱留设与压煤开采规程》中的概率积分法计算地表变形,但其预测结果往往与实际不符。该文以秀房沟煤矿为例,利用概率积分法和三维数值模拟法分别对其采空区地表变形进行预测,结果表明数值模拟法的预测结果比概率积分法的预测结果更接近于实际。结论证明数值模拟法能更好地克服概率积分法中的一些局限,对采空区地表变形的预测效果更佳,可用于煤矿采空区的地表变形评价。

The evaluation of the surface deformation of goaf is one of the key issues in the evaluation of coal mine disasters. At present, the probability integral method from Building, Water, Railway and Main Shaft and Coal Pillars Left in Coal Mining with Pressure Regulation is mainly used to calculate the ground surface deformation. But the predictions is not tally with the actual results. In this paper, taking the Xiufanggou Mine for example, the goaf ground deformation is respectively predicted by using the probability integral method and three-dimensional numerical simulation method. It indicates that the predictive results of numerical simulation method is more close to the actual than probability integral method. The conclusion shows that the numerical simulation method can better overcome some limitations of the probability integral method, and has better prediction effect on the surface deformation of goaf, which can be used for the surface deformation evaluation of the coal mine goaf.