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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。
The mechanics analysis model of the roof impact breaking mechanism is established by using the mechanics thin plate theory and the maximum elastic bending strain energy expression before the first roof capping is deduced by theoretical analysis. , The maximum elastic bending strain energy before the hard roof caving of the working face can be related to the weight of the overlying rock mass, the mining depth, the area of the suspended roof of the goaf, the thickness of the hard roof, the elastic modulus of the roof rock and the Poisson’s ratio By using MATLAB numerical analysis software combined with the actual roof roof parameters of 8403 working face in Yanzishan Mine, the three-dimensional stress cloud chart of roof stress was drawn and the roof failure characteristics were analyzed, which was in good agreement with the failure theory of roof “XO”.