卧龙湖煤矿10煤层瓦斯解吸特性及突出敏感性指标研究

Methane Desorption Characteristic and Burst Sensitivity Indicator of 10^(th) Coal-seam in Wolonghu Colliery

采用理论分析和实验室实验相结合的方法,以工作面回采期间现场工程实践进行跟踪考察,对卧龙湖煤矿10煤层钻屑瓦斯解吸指标敏感性进行了分析,通过对实验室测定的钻屑瓦斯解吸指标K1和Δh2值与实验室测定初始瓦斯解吸量进行对比,发现K1值比Δh2值更具可靠性。通过对钻屑瓦斯解吸指标K1和Δh2值与吸附平衡瓦斯压力P进行拟合,得到幂指数关系方程。通过对现场测定的钻屑瓦斯解吸指标K1,Δh2值进行对比分析,获得预测敏感指标的变化规律,分析钻屑瓦斯解吸指标K1,Δh2的敏感性,结果证明K1值敏感性高于Δh2。

Applying combined method of theoretical analysis and laboratory experiment, sensitivity of methane desorption index of drillings from 10th coal-seam of Wolonghu Colliery was analyzed. Comparing methane desorption index of drillings K1 , Ah2 and initial methane desorption volume tested by experiment showed that K1 was more reliable than Ah2. A power exponent relationship equation was obtained by matching K1 , Ah2 and methane pressure at the state of adsorption equilibrium P. By comparing in-situ measured K1, Ahz with experimental values, variation rule of sensitivity index for prediction was obtained. Sensitivity analysis result showed that K1 was more sensitive than Ah2.