摘要
采用物质描述增量有限元方法,对露天与地下联合开采工程岩体进行了数值模拟分析。通过计算不同顶板厚度、不同采空区跨度下岩体内所出现的最大拉应力,以岩体抗拉强度为准则,确定了露天坑底与地采空区的合理隔层厚度,并得出了采空区顶板安全厚度与采空区跨度的回归方程。
With the finite element method of material description, the rock mass in underground and opencast united mining engineering was simulated and analyzed. Calculating the maximum tensions in rock mass in different top thickness and different span of cavities, the reasonable thickness between opencast bottom and underground cavity was ascertained according to the critical tension strength of rock mass, and a regressive equation was obtained between the safe thickness of mining roof and cave span.
出处
《地下空间与工程学报》
CSCD
2006年第3期449-452,共4页
Chinese Journal of Underground Space and Engineering
关键词
地下空区
安全隔层厚度
数值模拟
underground cavity
safe cover thickness
numerical simulation
