钻屑瓦斯解吸指标与煤层瓦斯含量对应关系研究

Study on the relationship between the gas desorption index of drill cuttings and coal seam gas content corresponding

在实验室研究了钻屑瓦斯解吸指标与瓦斯压力之间的对应关系,两者之间符合乘幂关系,在此基础上利用煤层瓦斯含量与瓦斯压力的对应关系,建立了煤层瓦斯含量与钻屑瓦斯解吸指标之间的对应关系;在现场利用直接法对煤层瓦斯含量进行了测定,并同时测定了钻屑瓦斯解吸指标,通过煤层瓦斯含量与钻屑瓦斯解吸指标之间的对应关系算出了间接法计算出来的煤层瓦斯含量值,采用绝对误差以及相对误差对二者进行了对比;结果表明,采用钻屑解吸法来计算煤层瓦斯含量是可靠的。

Through studying the relationship between the gas desorption index of coal drills K1 in the laboratory, There existed the power correlation. And based on the relationship between the gas content and gas pressure ,the corresponding relationship between gas content and the gas desorption index was established. The gas content was determined by using the direct method, and the gas desorption index was measured at the same time. Then the gas content was calculated by the corresponding relationship between gas content and the gas desorption index, and the absolute error and relative error was compared. The result showed the method is reliable.