山西省下煤组瓦斯含量和成分变化规律研究  

Study on the Change Law of Gas Content and Composition of Lower Coal Formation in Shanxi Province

作　　者：贾钰 JIA Yu(Shanxi Institute of Geology and Mineral Resources;Shanxi Key Laboratory of Coal and Coal-Measure Gas Geology,Taiyuan 030001,China)

机构地区：[1]山西省地质矿产研究院 [2]煤与煤系气地质山西省重点实验室,太原030001

出　　处：《中国资源综合利用》2022年第7期50-52,共3页China Resources Comprehensive Utilization

摘　　要：随着煤层瓦斯开采规模的逐渐扩大,抽采的瓦斯气量和CH_(4)浓度逐渐降低。为了更好地利用煤层气和防治瓦斯,本文收集并整理了山西省下煤组的瓦斯成分数据5381个。经分析,大同煤田、宁武煤田中北部和霍西煤田的瓦斯含量及CH_(4)浓度较低,河东煤田南部和沁水煤田中东部瓦斯含量及CH_(4)浓度较高。随着深度逐渐增加,挥发分含量降低,瓦斯含量和CH_(4)浓度逐渐升高,N_(2)和CO_(2)的浓度逐渐降低,重烃的浓度也在降低,但趋势不太明显。With the gradual expansion of coal seam gas mining scale,the amount of gas extracted and the concentration of CH_(4) gradually decrease.In order to make better use of coalbed methane and control gas,this paper collects and organizes5381 gas composition data of lower coal formation in Shanxi Province.After analysis,the gas content and CH_(4) concentration in the Datong coalfield,the central-northern Ningwu coalfield and the Huoxi coalfield are relatively low,and the gas content and CH_(4) concentration are higher in the southern part of Hedong coalfield and the middle and eastern part of Qinshui coalfield.As the depth gradually increases,the volatile matter content decreases,the gas content and CH_(4) concentration gradually increase,the concentration of N_(2) and CO_(2) gradually decreases,and the concentration of heavy hydrocarbons also decreases,but the trend is not obvious.

关 键 词：下煤组 瓦斯 含量 成分 变化规律 

分 类 号：TD713[矿业工程—矿井通风与安全]