带压开采底板突水有效阻水系数法评价在西峪煤矿的应用研究

煤矿开采存在底板带压条件下，能否安全开采，最常用的评价方法是突水系数法。但由于煤层底板突水影响的因素多，在水文地质复杂的情况下，突水系数法还存在一定的局限性。综合考虑水压、隔水层底板厚度、岩性组合及特征、导升高度、煤岩层产状、构造等自然条件，以及工作面的采长、开采后的底板破坏深度等人为因素对煤层底板隔水能力的影响，采用有效阻水系数法评价了太原西峪煤矿9号煤开采的间接底板奥陶系峰峰组岩溶水突水危险性，其评价结果与实际情况对比分析表明，有效阻水系数法评价更加合理，是复杂水文地质条件煤层底板突水安全性评价的有效方法。

Application study on evaluation of effective water resistance coefficient of mining with pressure in Xiyu Coal Mine

When coal mining with water pressure，water inrush coefficient is a commonly used method to evaluate the safety of exploiting.But because of the various factors of water inrushing from coal seam floor，in many complicated hydrogeological conditions，water inrush coefficient method has some limitations.In this paper，the water resistance coefficient method is used，considering the water pressure，water resisting floor thickness，floor lithology combination and characteristics，guide height，coal seam occurrence，tectonic conditions，besides，the influence on the coal seam floor water resisting ability from mining face long after mining，failure depth of floor and other man-made factors are also took into consideration.This article took Xiyu Mine′s No.9 coal seam floor as an example by using effective water resistance coefficient method，and estimated the risk of karst water inrush from Ordovician Feng feng coal mining group in the indirect floor of No.9 coal.By comparing the evaluation results with the actual situation，it is found that the effective water resistance coefficient method is more reasonable，and it is an effective method for the safety assessment of water inrush from coal seam floor.