煤矿安全2025，Vol.56Issue(4)：1-8,8.DOI:10.13347/j.cnki.mkaq.20240062
基于碳同位素的回采工作面瓦斯溯源及运移规律研究
Study on gas source tracing and migration law of mining face based on carbon isotope
摘要
Abstract
In order to realize the accurate source control of gas in the mining face of a mine in Tangshan,based on the stable carbon isotope analysis technology,the linear mixed gas source calculation model was used to quantitatively analyze the sources and propor-tions of mixed gas at different locations of the mining face,and the gas flow model of the mining face and goaf was constructed to simulate and analyze the spatial volume fraction distribution and change of gas in different coal seams,and to reveal the dynamic mi-gration law of gas in the overlying coal seam and the coal seam.The results show that the carbon isotope values of CH4 in the coal seam and the overlying coal seam are-68.02%and-77.91%,respectively.The gas contribution ratios of the coal seam at the upper corner of the mining face,the return air roadway at 30 m from the working face,and the return air side of the goaf at 10 m and 40 m from the working face were 76%,67%,59%and 81%,respectively.Under the influence of air leakage diffusion and fracture distri-bution,the coal seam gas showed a dynamic migration law of cross-layer flow and accumulation to the return air side,and the gas volume fraction increased with the inflow of overlying coal seam gas.关键词
瓦斯来源/分源计算/碳同位素/定量溯源/瓦斯运移Key words
gas source/split source calculation/carbon isotope/quantitative traceability/gas migration分类
矿业与冶金引用本文复制引用
张嘉勇,王舒雅,崔啸,郭立稳,关联合,付京斌,陈晓永..基于碳同位素的回采工作面瓦斯溯源及运移规律研究[J].煤矿安全,2025,56(4):1-8,8.基金项目
国家自然科学基金资助项目(52174182) （52174182）
河北省省级科技计划资助项目(21376202D) （21376202D）
河北省自然科学基金资助项目(E2020209074) （E2020209074）
河北省属高校基本科研业务费资助项目(JQN2023019) （JQN2023019）
