高深矿井冲击矿压综合防治技术

Comprehensive Prevention and Control Technology of Mine Pressure Bumping in Deep Mine

为分析孙村矿深部2号和4号煤层及其顶板岩层的冲击倾向性,采用了冲击倾向试验和岩体浸水力学试验,对煤岩样的各冲击倾向性指数及其浸水后的强度变化进行了试验研究。结果表明:煤岩均具有中等冲击倾向性,且浸水7 d后强度降低明显。为了确保安全开采该煤层,提出了防治、预测预报、解危和防护等综合方法来防治冲击地压,在2423工作面回采过程中,2423回风巷煤岩钻孔0～7 m深内的煤粉量在0.7～7.3 kg/m变化且均小于危险指标,4422运输巷钻孔煤粉量在距孔口3 m范围内变化不大,且都处于危险值以下,实现了安全掘进和回采。

In order to get the outburst proneness of No.2 and No.4 coal seams and their roofs rock seams of Suncun colliery,outburst proneness experiments and soaking mechanical experiments were taken to analyze the every outburst proneness index of coal and rock samples and the strength change after soaking.The results show that they belong to medium bump proneness.And the strength of coal and rock samples could decrease obviously after seven days.In order to ensure safety mining,comprehensive control techniques of basic measures,prediction measures,precaution measures and protection measures were taken and the result of rockburst control in the process of mining in 2423 coal mining face and driving in 4422 headentry make clear that in 2423 tailentry the coal fines quantities of drillholes in the deep of 0~7 m vary in the range 0.7~7.3 kg/m and those all are less than the unsafe value.The coal fines quantities of the drillholes in 4422 headentry in the range of 3 m where is from the entrance vary a little and the values are less than the unsafe value.