摘要
随着国民经济的迅猛发展,矿产资源的逐渐枯竭,矿山露天与地下联合开采的实例越来越多,采空区上下方同时作业的矿山不在少数。针对这个问题,总结了评价矿山采空区顶板和矿柱稳定性常采用的理论分析方法,并针对大岭铁矿的实际工程实例,采用K.B鲁别涅依他公式和平板梁理论公式计算了顶板的最小安全留设厚度,利用岩石力学的极限平衡法分析了矿柱和顶板的稳定性,结合有限元数值模拟进行了对比分析,结果表明大岭铁矿采空区是稳定的。由此得出了上述理论分析和数值模拟是进行铁矿采空区稳定性分析的可靠手段和常用方法,可为以后类似开采提供参考。
With the swift development of the national economy in China, the mineral resource dries up gradually. More and more mines use the opencut and underground combined mining method, so there are often works above and under the goaf at the same time. Concerning this problem, this article summarized the common theoretical analysis methods of appraising the stability of roof and pillar in the goaf. Combining the actual project examples of Da - ling iron ore, this article used K. B and the flat beam theory formula to calculate the minimum safety thickness of roof, and used the limit equilibrium method of rock mechanics to analysis the stability of the pillar and roof. Compared with numerical simulation of the finite element method, the results showed that the underground goaf of Da - ling iron ore is stable. So the above - mentioned theory and numerical simulation method are reliably common method of appraising the stability of the goaf of iron mine. This article provides reference for similar mine exploitation.
出处
《地下空间与工程学报》
CSCD
北大核心
2009年第4期808-813,819,共7页
Chinese Journal of Underground Space and Engineering
关键词
采空区
铁矿
矿柱
顶板
有限元
goaf
iron ore
pillar
roof
finite element method
