燕子山矿坚硬顶板冲击地压机理分析

Analysis of Rock-burst Mechanism with Hard Roof in Yanzishan Mine

采用理论分析研究了燕子山矿综采面坚硬顶板冲击地压机理,运用弹性力学薄板理论,建立顶板冲击破断机理力学分析模型,推导出了顶板初次垮落前的最大弹性弯曲应变能表达式,得到工作面坚硬顶板垮落前的最大弹性弯曲应变能与顶板上覆岩体容重、开采深度、采空区悬顶面积、坚硬顶板的厚度、顶板岩层的弹性模量和泊松比等因素有关;运用MATLAB数值分析软件结合燕子山矿8403工作面顶板实际参数,绘制出顶板应力三维立体应力云图,分析得到顶板的破断特征,与顶板的"X-O"破坏理论相符。

Using theoretical analysis to study the rock-burst mechanism for fully-mechanized coal mining face with hard roof in Yanzishan mine, applying the theory of mechanics of elasticity sheet roof mechanism of rock-burst mechanics analysis model is established and derived the first caving roof before the maximum elastic bending strain energy expression, get hard roof caving working face in front of the maximum elastic bending strain energy and the overlying roof rock mass density, mining depth, the goaf roof hanging area, the thickness of the hard roof, roof strata of the elastic modulus and poisson＇s ratio and other factors; Using the actual parameters in the 8403 working face stress cloud of roof analysis obtained roof b sabotage theory. MATLAB numerical analysis software combined with the roof of Yanzishan mine, to map out a three-dimensional reaking features, and correspond with the roof of ＂X-O