辽宁工程技术大学学报（自然科学版）2023，Vol.42Issue(6)：641-648,8.DOI:10.11956/j.issn.1008-0562.2023.06.001
热力-动力复合变质煤的瓦斯放散特征及表征指标研究
Study on gas dispersion characteristics and characterization indexes of thermodynamic composite metamorphic coal
摘要
Abstract
In order to study the gas dispersion law of thermal-power composite metamorphic coal,the pore change characteristics of metamorphic coal were analyzed through electron microscope scanning,specific surface area measurement,mercury injection and initial velocity experiment of gas emission.The pore development law and gas emission characteristics of metamorphic coal were revealed,and a new index of gas emission characteristics,velocity-solid ratio,was proposed.The results show that compared with normal coal,the thermo-power composite metamorphic coal has large and medium porosity,the microporous pore volume and specific surface area decrease,the adsorption capacity of gas is enhanced,and the risk of gas outburst is greater.The velocity-solid ratio can better characterize the gas emission characteristics of composite metamorphic coal.The research conclusion provides a reference for predicting the risk of coal gas outburst due to igneous rock intrusion and faults.关键词
孔隙系统/瓦斯放散初速度/突出指标/热力变质煤/动力变质煤Key words
porosity systems/initial velocity of gas dispersion/highlight indicators/thermally metamorphic coal/power metamorphic coal分类
矿业与冶金引用本文复制引用
富向,沙慧慧,陈志平,刘洪达,刘烜,范超军..热力-动力复合变质煤的瓦斯放散特征及表征指标研究[J].辽宁工程技术大学学报（自然科学版）,2023,42(6):641-648,8.基金项目
国家自然科学基金项目(52174117 （）
52004117) （）
辽宁工程技术大学学科创新团队项目(LNTU20TD-30) （LNTU20TD-30）
