摘要
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。
Several kinds of indexes representing the engineering quality of rock mass in Bainiuchang ore lield were selected by the engineering geology survey and the mechanical tests of ore and rock. The values of RMR and Q are acquired by analysis. On the basis, the stope safety span and stability time of mined-out area are evaluated and predicted. Mathews stability graph is applied to calculated the stability numbers of various wall rock. Based on the functional relationship between stability number and shape factor, the shape factors of different rock failure are obtained. Furthermore, the stope exposure area of mined-out area at rock failure is also calculated. Finally, some solutions are proposed according to the present situation of no support or support failure in underground mines.
出处
《黄金》
CAS
北大核心
2009年第12期25-28,共4页
Gold
基金
云南省科技强省计划项目(2008AD001)
