The main minable III coal seam in the Shanxi Formation in the Guocun coalmine was threatened by floor karst water during the mining process. After minefield hydrogeological characteristic and coal floor waler bursting factorial analyses have considered that: the minor and hidden faults in the area obviously linked up locally developed karst water and made groundwater enrichment. Alternating coal floor hard and soft rocks are very good to prevent water bursting from lower Taiyuan Formation limestone water and Ordovician limestone water. Along with increasing of mining depth, lower Taiyuan Formation limestone aquifer and Ordovician Majiagou Formation limestone aquifer will be linked up with roadway floor through water conducted zone, thus water bursting accidents are very likely to happening. Coal floor water bursting hazard has been estimated through water bursting coefficient method and critical pressure ratio coefficient method respectively, and carried out water bursting hazard comprehensive partition, then proceed to control measures by the division, and pointed out the way of water control in the coalmine.%郭村煤矿主采山西组二1煤层,在开采过程中遇到底板岩溶水的危胁.通过对井田水文地质特征及煤层底板突水因素的分析认为:区内小断层及隐伏断层对局部地段的岩溶发育和岩溶地下水的富集起着明显的沟通作用;煤层底板软硬交替的岩层组合形式,对阻止太原组下段灰岩和奥陶系灰岩突水非常有利；随着开采深度的增加,太原组下段石灰岩含水层和奥陶系马家沟组石灰岩含水层将通过导水裂隙或断层与巷道底板沟通,极有可能发生突水事故.分别按照突水系数法和临界压力比值系数法对煤层底突水危险性进行了计算,并进行了底板突水危险性综合分区,进而提出了分区防治措施,为该矿的防治水工作指明了方向.
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