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利用快速拉格朗日分析方法，单因素分析了工作面斜长和构造应力对煤层底板应力应变的影响。提出水平构造应力是煤层底板变形破坏不可忽略的重要因素之一。综合分析了煤层倾角、煤层埋藏深度、工作面斜长和构造应力影响下煤层底板的变形破坏规律，得到了煤层底板最大破坏深度计算公式。
Using the fast Lagrangian analysis method, the effect of slope length and tectonic stress on the stress and strain of coal floor is analyzed by single factor. It is proposed that horizontal tectonic stress is one of the important factors that can not be ignored in the deformation and destruction of coal floor. Comprehensively analyzed the law of deformation and failure of the coal floor under the influence of coal seam inclination, depth of coal seam burial, slope length and tectonic stress, and obtained the formula of the maximum failure depth of coal floor.