深部矿井复合构造区冲击地压预警方法

以孟村煤矿中央大巷复合构造区周期性冲击地压为背景,在矿井现有的冲击地压监测系统的基础上,根据动静载叠加诱冲原理和冲击启动理论,提出以静载荷的积聚位置、积聚周期和动载荷的来源、供给时间为深部矿井复合构造区冲击地压"四要素"的周期性预警方法。分析认为,深部矿井冲击地压主要因素为静载荷,发生冲击地压的前提条件是静载荷必须重新积聚至原水平附近,只有静载荷满足条件后才能根据动载荷来源、供给时间再结合地质条件、开采因素以及冲击地压监测系统做辅助确认再进行预警。该周期性预警方法已成功实现3次冲击地压的精准预警,可为国内类似地质条件的煤矿防冲工作提供一定借鉴。

The early warning method of rock burst in the compound structure area of deep mine

Taking the periodic rock burst in the composite structure area of central main roadway in Mengcun coal mine as the research object,based on the existing rock burst monitoring system in the mine,according to the principle of dynamic and static load superposition and the theory of rock burst start-up,the periodic early warning method is proposed,which takes the accumulation position and accumulation period of static load,and the source and supply time of dynamic load as the“four elements”of rock burst in deep mine composite structure area.The analysis shows that the main influencing factor of rock burst in deep mine is static load,and the precondition of rock burst occurrence is that the static load must be re-accumulated near the original level.Only when the static load meets the conditions,can early warning be made according to the dynamic load source and supply time,geological conditions,mining factors and rock burst monitoring system.The periodic early warning method has successfully achieved three accurate early warning of rock burst,which can provide certain reference for similar geological conditions of coal mine to prevent rock burst in China.