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基于岩体极限平衡理论,研究了完整近水平煤层底板突水力学机制。综合考虑底板隔水层厚度、工作面斜长及隔水层岩性组合特征,推导出了底板突水极限水压值计算公式。以保德煤矿为例,将突水极限水压值法运用到保德煤矿13#煤底板突水危险性预测中。通过与传统突水系数法对比分析,阐明了突水极限水压值法的优越性:突水极限水压值法改进了传统突水系数法,可更有效地进行工作面斜长较大时的底板突水危险性预测。
Based on the limit equilibrium theory of rock mass, the mechanism of water inrush from floor of complete and near horizontal coal seam is studied. Considering the thickness of the floor aquifer, the slope of the working face and the lithologic combination characteristics of the aquitard, the calculation formula of water inrush limit of the floor is deduced. Taking Baode Coal Mine as an example, the water inrush limit water pressure method is applied to predict the water inrush hazard of floor 13 # in Baode Coal Mine. By comparing with the traditional water inrush coefficient method, the superiority of water inrush limit water pressure method is clarified: water inrush limit water pressure method improves the traditional water inrush coefficient method, The risk of water inrush from the floor is predicted.