National Engineering and Research Center for Coal Gas Control, China University of Mining & Technology School
of Safety Engineering, China University of Mining & Technology

为准确界定预测突出危险性的钻屑瓦斯解吸指标临界值,基于钻屑瓦斯解吸指标物理意义的解释和实验室条件下对屯兰煤矿2号煤层煤样解吸规律的分析,阐述了钻屑瓦斯解吸指标、瓦斯解吸量与平衡压力之间的关系;综合理论计算与现场实际情况,确定了屯兰煤矿2号煤层"高压力、低含量"的突出特征及其临界突出压力,并计算获得突出危险性预测钻屑瓦斯解吸指标K1的临界值为0.18 mL/(g·min0.5),Δh2的临界值为95 Pa,现场应用表明,所确定的临界值对突出危险性的预测更为准确,能够更好地保证矿井生产安全。

In order to define the critical value of driling cuttings gas desorption indices which predicted gas outburst risk, based on the physical meaning explanatio n of drilling cuttings gas desorption indices and the desorption regulation of the No.2 coal seam in Tunlan Coal Mine, the relationship of the indices, the gas desorption quantity and the gas pressure were obtained.Through the theoretical calculation and actual mining situation, the outburst of the No.2 coal seam was characterised by hi gh gas pressure and low gas content.The critical value of gas pressure which could indicate the outburst was given.The critical value of drilling cuttings gas desorption i ndices were calculated, 0.18 mL/ (g-min0.5)for K1 and 95 Pa for Oh2.The field application showed that the identified critical value was more accurate for the outburst P erdiction, which could better guarantee the safety mining.

中央高校基本科研业务费专项资金资助项目(2014ZDP08)；