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煤矿废弃后地下水位重新回升,并对矿井边界的隔离煤柱产生破坏作用,对邻近生产矿井造成极大的突水威胁。根据矿井间隔离煤柱组成及其所受侧向支撑压力的分析,获得隔离煤柱遭到破坏的最大水压计算公式。通过建立典型废弃矿井理论模型,并进行地下水位回升模拟计算,获得水位变化资料,利用公式获得了此模型中隔离煤柱破坏的临界水位和可能破坏的时间,分析了邻近矿井突水威胁程度。
After the coal mine was abandoned, the groundwater level will rebound again, which will have a damaging effect on the pillars of the coal mines at the boundary of the coal mines, posing a great threat of water inrush to the adjacent production mines. Based on the analysis of the coal pillar composition and the lateral support pressure of the interval between mines, the formula of the maximum hydraulic pressure for the failure of the pillars is obtained. By establishing a typical theoretical model of abandoned mine and carrying out simulation calculation of groundwater level rise, the data of water level changes were obtained. The critical water level and the possible destruction time of the isolated coal pillar in this model were obtained by the formula, and the threat degree of water inrush in the adjacent mine was analyzed.