废弃煤矿水位回升诱致邻矿突水威胁分析

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。

Risk Analysis on Adjacent Mine Water Inrush Caused by Groundwater Rebound of Abandoned Coal Mine

Groundwater level rebounded after coal mines abandoned,and the changes of groundwater level probably damaged the waterproof pillars between coal mines,which brought a great water inrush threat for the adjacent production mine.Based on the analysis of components of waterproof pillars and lateral pressure forced on pillars,it obtained the maximum water pressure calculation formula of waterproof pillar destruction.Through establishing the theory model of typical abandoned mines,it carried out simulation calculation for groundwater level rebound to get the data of water level change.With the formula,it obtained the critical water level and possible damage time of waterproof pillars in this model,and analyzed the degree of water inrush threat for adjacent mine.