School of Resources and Safety Engineering, China University of Mining and Technology (Bejjing) School of Safety
Science and Engineering, Henan Polytechnic University Lugou Mine, Zhengzhou Coal and Electric Power
Corporation Limited

为了确定瓦斯含量临界值,以预测煤与瓦斯突出区域,提出了基于瓦斯吸附-解吸试验的瓦斯含量临界值确定方法。通过瓦斯吸附-解吸试验建立了瓦斯压力、瓦斯含量与钻屑瓦斯解吸指标Δh2的关系式,得出平煤一矿丁6煤层Δh2的临界值为160 Pa,进而计算出Δh2取临界值时对应的最小瓦斯含量为5.04 m3/t,这与通过朗格缪尔公式法初步确定的瓦斯含量临界值5 m3/t具有较好的一致性。工程应用验证了基于瓦斯吸附-解吸试验的瓦斯含量临界值确定方法的合理性。

In order to determine the critical value of gas content and predict the coal and gas outburst region, a method to determine the critical value of gas conten t was provided based on the gas adsorption and desorption experiment. With the gas adsorption and desorption experiment, a relation formula between the gas pressur e, gas content and the drilling cuttings desorption index Ah2was established, the critical value of the drilling cuttings desorption index Oh2obtained in No. D6 seam of Pi ngmei No.1 Mine was 160 Pa and the relevant minimum gas content calculated was 5. 04 m3/t when Oh2was in the critical value, which had good agreement with the g as content critical value of 5 m3/t preliminarily determined with Langmuir formula method. The engineering application showed that the method to determine the critical value of gas content based on the gas adsorption and desorption experiment was rational.

“十一五”国家科技支撑计划资助项目(2006BAK03B01)；