With the mumerical calculation method, the influence and break of the floor aquifuge upon mining are analysed,the regular recognition of the mechanism of the gushing from coal floor is advanced.

• 应用数值计算方法，分析了采动对底板隔水层岩体上都和下部的影响与破坏，对底板突水机理提出了一些规律性的认识。