论文部分内容阅读
针对淮南矿区深部矿井丁集煤矿煤的突然压出区域瓦斯地质特征,分析了综掘面煤的突然压出摩擦滑动失稳力学机制,并研究得出了其预测敏感指标钻屑量S及孔深系数S′、钻孔瓦斯涌出初速度q及衰减系数Cq的临界值:S0=6.0kg/m;S0′=0.9kg/m/m;q0=2.5L/min和当2.5≤q0﹤5L/min,Cq=0.65。创新性地提出了采用S′预测以地应力为主导作用的低指标突出,并可提高预测准确率,在试验区近3000m巷道掘进过程中,预测不突出危险率87%,不突出准确率100%,其研究成果对类似矿井异常瓦斯动力灾害治理具有重要借鉴作用。
In view of the geological characteristics of gas suddenly emerging from Dingji coal mine in the deep mine of Huainan Mining Area, the mechanics mechanism of sudden extrusion frictional sliding instability of fully mechanized face coal is analyzed and the results show that the prediction of the sensitivity index of drill cuttings S and hole S0 = 6.0 kg / m; S0 ’= 0.9 kg / m / m; q0 = 2.5 L / min and when 2.5 ≦ q0 <5 L, the critical value of the deep coefficient S’, the initial gas blowout velocity q of the borehole and the attenuation coefficient Cq /min,Cq=0.65. Innovatively put forward the use of S ’prediction to stress as the leading role of low index prominence, and can improve the accuracy of prediction in the test area nearly 3000m Roadway Tunneling, the prediction does not highlight the risk rate of 87%, does not highlight the accuracy of 100 %. The research results have important reference for the management of abnormal gas dynamic disasters in mines.