数值模拟在回坡底煤矿底板突水防治中的应用

Numerical simulation in the floor inrush water control of Huipodi coal mine

随着煤矿开采深度的不断增加,将面临高承压水的严重威胁,带压开采已成为深部煤炭资源开采的主要方式。应用RFPA2D-Flow系统对煤层底板破坏深度进行了数值模拟,得出了回坡底煤矿采煤工作面煤层底板岩层的破坏深度约为12 m;同时,当回采到110 m处时,自切眼向掘进方向50～80 m处出现漏斗状底板破坏区,该破坏区将可能导通底部奥灰水,使煤层底板发生突水。

As the coal mining depth is increasing gradually, the mine will face the serious threat of the high pressure water, mining above aquifer has already become main way in which the deep coal resources are mined. The paper employs RFPA2D-Flow analytical system to simulate the coal seam floor destructive depth, and educes the 12 m destructive depth of the coal seam floor of mining working face, meanwhile, when coal extraction to 110 m, there is a tundish form to appear in 50 -80 m range from cutting to driving direction, the destructive area will switch into conduction Ordovician period calcareousness water, and make inrush water from coal seam floor take place.