【摘要】 针对演马庄矿突水原因复杂多变的现状,采用岩层运动和矿山压力理论,运用数值计算的方法,结合在演马庄矿25081和27111工作面的实际模拟,对比了不断顶、断顶条件下顶底板超前应力的模拟状态。研究结果表明,对坚硬顶板进行提前断顶处理,能够有效减少底板的破坏深度,从而减轻突水危险性。证明了断顶后大幅度降低了老顶初次来压期间的出水量,起到了较好的防止突水的效果。更多还原

【Abstract】 In connection with the cause of water bursting of complex and changeful situation in Yanmazhuang coal mine,this paper used the movement of strata and ground pressure theory,combined athe actual simulation of 25081 and 27111 working faces,and compared the simulation state of advanced crustal stress in the condition of keeping and broken tops.Research results show that,the hard roof for early broken roof treatment,can effectively reduce the broken depth of the floor,thereby reducing the risk of water inrush,broken top that greatly reduces the initial pressure of the main roof during periods of water,has good preventing water burst effect.更多还原