基于长观孔水位变化的压架突水灾害预警

Early Warning of Water Inrush and Sudden Roof Stress Disaster Based on Change of Water Level in Long Term View Station

基于长观孔水位的变化,以某矿松散含水层采煤工作面回采为研究背景,研究松散含水层采煤工作面压架突水灾害预警。研究结果表明:水位与采动之间存在联动关系,即工作面回采便会引起长观孔水位的升降变化。通过计算近2~3天的平均降速,并与预警值对比,若发现水位呈连续下降现象,水位降深累计超过1 m,再结合工作面压力情况,如果工作面普遍剧烈来压并发生活柱大量下缩的情况,那么需要发布压架突水灾害预警,同时依据地质条件建立了基于长观孔水位降速的压架突水灾害预警系统。

Taking the working face in a loose aquifer of a coal mine as background,based on the change of water level in long term view hole,the law of early warning for water-inrush and sudden roof stress is studied.The research results show that there is an interrelationship between the water level and mining,that is,the mining activities in the working face will cause the rise or fall of the water level.By calculating the average water decrease rate in the latest 2 to 3 days and comparing it with the setting warning lin e,if the water level is found to be continuously decreasing,and accumulated to be more than 1 meter,then go to watch the pressure in the working face,if the shaft of hydraulic support being greatly shrunk,it is high time to announce an early warning for water inrush or sudden stress of the roof.