钻屑解吸指标临界值的确定

Determination of the Critical Value of Desorption Index for Drill Cuttings

通过测定北票、焦作和抚顺矿区突出预测参数，建立了钻屑解吸指标同瓦斯压力、瓦斯放散初速度指标、煤的坚固性系数和煤的挥发份之间的关系，提出了确定钻屑解吸指标临界值的方法，得出煤钻屑解吸指标临界值无烟煤为３９２Ｐａ，烟煤为１６０Ｐａ．

Based on the measurement of relevant parameters for drill cuttings in Beipiao, Jiaozuo and Fushun coal mining areas, a study on the relation between desorption index and methane pressure, initial methane releasing rate, coal sturdiness factor and coal volatility is made, and a method to determine the critical value of desorption index for drill cuttings is put forward. The critical value is given, being 392Pa for hard coal and 160Pa for soft coal.