煤中残余气含量及其影响因素

Residual Gas In Coals And Control Factors

煤中残余气是煤层气的一个组成部分，其含量直接影响到煤层气含量和煤的含气饱和度。本文对不同地区、各种煤级的近１００ 个煤心煤样的残余气含量测试结果进行了综合分析研究，找出了煤中残余气含量的分布变化规律，探讨了其影响因素。结果表明：不同煤的残余气含量不相同，变化范围为０～３ ｍ ３／ｔ；残余气在煤层气中占的比例变化很大，为１．５％ ～３０．０％ ；残余气含量的高低受煤级、灰分和煤样粒度等因素影响，煤级和灰分越高。

Residual gas is one part of coalbed gas and has an impact on gas saturation in coal.This paper has analyzed and researched residual gas,proximate analysis and coal petrology measurements of approximat 100 coal core samples with different rank and from, different places.It has been concluded that residual gas contents in coals are different with wide range from 0 to 3 m 3/t.The ratios of residual gas content to coalbed gas content are greatly variable from 1 5% to 30 0% .Residual gas content is controlled by coal rank,ash content,coal core size and so on.It is directly proportional to coal rank and ash content.