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本文在现场矿压观测和相似模拟实验基础上,提出适合厚煤层倾斜分层开采的有限元力学计算模型,得出采场围岩力学参数与工作面顶板下沉量之间的函数关系式及分层回采工作面的 P-S 关系式。同时,分析对比了南屯煤矿3_上煤层分层开采条件下采场围岩应力分布、岩层移动特点和顶板稳定性评价,确定了回采工作面支架合理的支护阻力。
On the basis of on-site rock pressure observation and similar simulation experiments, this paper presents a finite element mechanical calculation model suitable for inclined seam mining of thick coal seams, and obtains the functional relationship between mechanical parameters of rock mass and roof subsidence in working face Stratified mining face of the PS relationship. At the same time, the stress distribution, rock movement characteristics and roof stability evaluation of surrounding rock under 3 ~ upper seam mining in Nantun Coal Mine are analyzed and compared, and reasonable support resistance of mining face support is determined.