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为防治卧龙煤矿首采区的底板突水,根据首采区煤层底板地质特征,分析了底板岩浆岩岩性及其组合特征,考查了太原组灰岩水的富水性和水压情况,并采用了应变软化本构关系,建立地质力学模型.运用快速拉格朗日元法对承压水体上底板的采动效应进行了数值模拟,分析了应力、位移场,确定10煤回采底板破坏深度为13 m.结果表明底板导水裂隙带深度未超出突水系数所确定的危险界限16 m,应用数值分析的结果判定太灰水对10煤回采无突水威胁.
In order to prevent the water inrush from the floor of the first mining area in Wolong Mine, the lithology and assemblage characteristics of the floor rock are analyzed according to the geological characteristics of coal seam floor in the first mining area. The water and water pressure of the limestone in Taiyuan Formation are investigated. Strain softening the constitutive relationship and establish the geomechanical model.Using the fast Lagrangian method to simulate the mining effect on the floor of the confined water body, the stress and displacement fields are analyzed, and the destructive depth of 10 floor floor is determined to be 13 m. The results show that the depth of the aqueduct zone does not exceed the dangerous limit of 16 m determined by the water inrush coefficient, and the numerical analysis results show that there is no water inrush threat to the 10 th coal mining.