【摘要】 基于采场覆岩的弹性模量、泊松比、抗压强度等参数服从Weibul分布的假设 ,运用岩体破裂过程分析 (RFPA2D)系统 ,模拟浅埋厚硬顶板冒落与支承压力的动态变化规律 ,分析了浅埋煤层厚硬顶板的破断机理。研究表明 :浅埋煤层厚硬顶板的破断与冒落规律与普通埋深煤层中覆岩的破断与冒落规律有显著差异 ,其初次破断与冒落形态为拱形 ,周期破断与冒落呈全厚切落和拱形交替发生。这些研究对西部大量浅埋煤层矿区矿压控制具有重要的参考价值更多还原

【Abstract】 Based on the hypothesis that the elastic Modulus, possion’s ratio, compressive strength, which obey the Weibul distribution, the software of rock failure process analysis (RFPA) is applied to simulate the dynamic variation laws of the strata falling and support pressure, and the breakage mechanism of thick and hard roof rock in shallow seam. The study results indicate that there is a remarkable difference in breakage and falling law of thick and hard roof between the shallow seam and common buried seam, and its first breakage and falling appears arch, periodic breakage and falling present alternately full thick cut-off with arc. All these studies above have an important reference value on the ground pressure control of the plenty of shallow seam in west coal area.更多还原