矿山压力对煤层底板破坏深度的数值分析

随着煤炭资源开采深度加大,带压开采已经成为我国深部矿井普遍应用的一种采煤方法,这样面临的煤层底板突水问题变得更加集中。突水系数理论作为评价带压开采煤层底板突水危险性的主要依据,因矿山压力导致煤层底板破坏深度的确定对得出可靠的突水系数值显得尤为重要。本文根据城郊煤矿的开采实践,利用F-RFPA2D软件对煤层底板破坏深度进行数值模拟分析,动态再现煤层底板破坏过程,并得出在不同矿山压力过程中对煤层底板的破坏深度。

Numerical analysis of breaking depth of coal floor caused by mining pressure

With coal resources are exploited and deepened, mining above aquifer has already became a coal mining method generally employed in deep mine of China. So the problem of coal floor inrush water becomes more serious. Water inrush coefficient theory, as evaluating the fatalness of coal floor inrush water, is a primary basis of mining above aquifer. Making sure that strata pressure causes the destructive deepness of coal floor,it is important to obtain reliable water inrush coefficient value. According to exploiting practice of Chengjiao coal mine,this paper utilized F-RFPA2D software to carry out the analysis of numerical simulation about destructive deepness of coal floor, dynamically reproducing the destructive course of coal floor, and obtaining the destructive depth to coal floor during the different course of strata pressure.