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本文介绍了彭家冲井用钻屑瓦斯解吸指标 K_1预测急倾斜不稳定煤层掘进工作面煤与瓦斯突出危险倾向的实践结论。文章认为:①同一煤层同一巷道的不同地点的 K_1值不同,这给不同地区采取有针对性的措施提供了依据;②在地质构造变化带 K 增大;③当 K 值大于或等于0.4970时,或打钻时发生异常瓦斯动力现象即有突出危险性,应采取相应的防突措施;④利用 K_1值检验深孔松动爆破防突的作用,效果明显、方法简单、直观、易于推广。
This paper introduces the practical conclusion of predicting the dangerous tendency of coal and gas outburst in coal mining face with steeply inclined and unstable coal seam by using drill gas methane desorption index K_1 in Pengjiazui well. The article states: ① The K_1 values of different sites in the same roadway of the same coal seam are different, which provides the basis for taking targeted measures in different regions; ②The increase of K in the geological structure change zone; ③ When the K value is greater than or equal to 0.4970, Or drilling abnormal gas dynamic phenomenon that there is a prominent risk, should take the corresponding anti-sudden measures; ④ use K_1 value of loose-hole blasting test of deep-hole effect, the effect is obvious, the method is simple, intuitive and easy to promote.