介绍一种简易快捷的煤层瓦斯含量的计算方法

CBM Content Measuring Made Easy

大量煤层瓦斯解吸资料表明,解吸瓦斯量(Q)与煤样气体解吸时间的开方(θ),呈Q=abθ(b<0)曲线的相关关系。依据这种关系,由现场瓦斯煤样的解吸资料,建立起θ与Q的回归方程,再按《煤层气测定方法(解吸)MT/T77-1994》中的有关规定计算出损失瓦斯及在化验室测试的常温下煤层瓦斯的自然组分、可燃物质量等数据,进而便可求得煤层瓦斯含量值。该方法在江西省丰城矿区石上井田勘探工作中取得了较好的效果。

Plentiful gas desorption data demonstrated that the desorpted gas quantity （Q） has a Q=ab correlativity with radication of coal sample gas desorption time,. Based on the relationship, to use the field gas sample desorption data set up a regression equation between D and desorpted gas quantity. Then according to related stipulations calculate lost gas quantity and gas composition and combustible matter quantity tested in laboratory under normnl temperature, then proceed to arquire coal seam gas content. The, method has applied in Shishung mine, field, Fengcbeng mining area exploration practice and obtained rather good results.