山西省上煤组瓦斯含量和气成分规律研究
贾钰^1，2
（1. 山西省地质矿产研究院，山西 太原 030001；2. 煤与煤系气地质山西省重点实验室，山西 太原 030001）
摘要： 随着煤层瓦斯开采规模的逐渐扩大，抽采出来的瓦斯含量和CH4的体积分数在逐渐降低。为了能更好地利用
和防治瓦斯，收集整理了山西省66 个县市上煤组的瓦斯气成分数据5 830 个，分析得出大同煤田、宁武煤田和霍西煤田
的瓦斯含量及CH4的体积分数较低；河东煤田南部和沁水煤田北部和南部瓦斯含量及CH4的体积分数较高。随着煤层深
度逐渐增加，挥发分含量降低，对应的瓦斯含量逐渐升高，气成分中CH4的体积分数逐渐升高，N2和CO2的体积分数逐
渐降低，重烃的体积分数几乎不变。
关键词： 上煤组；瓦斯；气含量；气成分；分布规律
中图分类号： P618.13     文献标志码： A     文章编号： 2095-0802-(2022)08-0036-04
Gas Content and Gas Composition Law of Upper Coal Formation in Shanxi Province
JIA Yu^1,2
(1. Shanxi Institute of Geology and Mineral Resources, Taiyuan 030001, Shanxi, China; 2. Shanxi Key Laboratory of Coal and
Coal Measure Gas Geology, Taiyuan 030001, Shanxi, China)
Abstract: With the gradual expansion of coal seam gas mining scale, the gas volume and CH4 volume fraction are gradually
decreasing. In order to make better use of and prevent gas, this paper collected 5 830 gas composition data of upper coal
formation in 66 counties and cities of Shanxi Province. The analysis has showed that the gas content and CH4 volume fraction in
Datong Coalfield, Ningwu Coalfield and Huoxi Coalfield are low; the gas content and CH4 volume fraction are higher in the south
of Hedong Coalfield and the north and south of Qinshui Coalfield. As the depth of coal seam gradually increases, the volatile
content decreases, the corresponding gas content gradually increases, the CH4 volume fraction in gas component gradually
increases, the N2 and CO2 volume fraction gradually decrease, and the volume fraction of heavy hydrocarbons is almost unchanged.

Key words: upper coal formation; gas; gas content; gas composition; distribution law