小屯煤矿近距离突出煤层群联合抽采瓦斯溯源研究  

Research on source gas of combined drainage of close outburst coal seams in Xiaotun Coal Mine

作　　者：董小明 张帅 张涛 刘乐 Dong Xiaoming;Zhang Shuai;Zhang Tao;Liu Le(Guizhou Ansheng Energy Co.,Ltd.,Guiyang 550000,China;CCTEG Chongqing Research Institute,Chongqing 400037,China;Guizhou Dafang Coal Industry Co.,Ltd.,Bijie 551700,China;CCTEG Xi′an Research Institute,Xi′an 710054,China)

机构地区：[1]贵州安晟能源有限公司,贵州贵阳550000 [2]中煤科工集团重庆研究院有限公司,重庆400037 [3]贵州大方煤业有限公司,贵州毕节551700 [4]中煤科工集团西安研究院有限公司,陕西西安710054

出　　处：《能源与环保》2021年第9期57-63,共7页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：中煤科工集团西安研究院有限公司科技创新基金资助项目(2019XAYMS18)。

摘　　要：为了识别煤层群联合抽采混合气体瓦斯来源、确定各煤层瓦斯抽采占比,以小屯煤矿6上、6中及6下煤层联合抽采瓦斯为研究背景,以碳同位素法和分层计量法为研究手段,分析各煤层瓦斯组分及碳同位素特征,识别混合气体瓦斯来源,确定各煤层瓦斯抽采占比。结果表明:小屯煤矿各个煤层瓦斯组分含量和碳同位素值存在差异性;建立了煤层群联合抽采瓦斯混源比例计算模型,碳同位素法确定混合气体中6上煤层占10.82%~24.54%,6中煤层占57.81%~69.58%,6下煤层占5.88%~31.37%;分层计量法确定混合气体中6上煤层占12.98%~19.55%,6中煤层占55.28%~60.55%,6下煤层占25.17%~26.47%。2种计算方法均证实了6中煤层的混合比例最大,占据主导地位。研究结果表明,基于同位素进行煤层群联合抽采瓦斯混源比例的计算是科学准确的,为煤层群瓦斯联合抽采达标评判提供新的研究思路。In order to identify the source of mixed gas combined with coal seam extraction and determine the proportion of gas extraction in each coal seam.Taking the combined gas extraction ofⅥupper,Ⅵmiddle andⅥbelow coal seams in Xiaotun Coal Mine as the research background,the carbon isotope method and the stratification measurement method were used as research methods to analyze the gas composition and carbon isotope characteristics of each coal seam,and to identify the mixed gas source,determined the proportion of gas drainage in each coal seam.The results showed that there were differences in the gas composition content and carbon isotope value of each coal seam in Xiaotun Coal Mine;a calculation model for the proportion of gas mixed source combined with coal seam extraction was established,and the carbon isotope method determines that theⅥupper coal seams accounts for 10.82%~24.54%,Ⅵmiddle coal seams accounted for 57.81%~69.58%,Ⅵbelow coal seams accounted for 5.88%~31.37%;stratification measurement method determined thatⅥupper coal seams accounted for 12.98%~19.55%,Ⅵmiddle coal seams accounted for 55.28%~60.55%,andⅥbelow coal seams accounted for 25.17%~26.47%.Both calculation methods had confirmed that the coal seam inⅥmiddle had the largest mixing ratio,occupying a dominant position.The study confirmed that the calculation of the mixed source ratio of coal seam group combined gas drainage based on isotope was scientific and accurate,and it provided new research ideas for the evaluation of coal seam group combined gas drainage standard.

关 键 词：近煤层群 联合抽采 碳同位素法 分层计量法 瓦斯溯源 

分 类 号：TD712.6[矿业工程—矿井通风与安全]