通过对白牛厂矿区的工程地质调查、矿岩力学性质试验,选取了表征矿山岩体工程质量的各种指标,获得了岩体工程分类结果--RMR值和Q值,并根据评分结果分别对井下采场安全跨度和采空区稳定时间进行了评价和预测.应用Mathews稳定图法中稳定数的计算方法,计算出各类岩石的稳定数,然后根据拟合的稳定数与形状因子间的函数关系,得到各类围岩采空区破坏时形状因子,以此计算出了采空区围岩发生破坏时的采场暴露面积.最后,针对矿山井下无支护或支护失效的现状,提出了相关解决方案.
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