煤矿安全2026，Vol.57Issue(5)：10-18,9.DOI:10.13347/j.cnki.mkaq.20251015
超临界CO2作用下无烟煤渗透性及力学特性演化规律研究
Study on evolution laws of permeability and mechanical properties of anthracite under supercritical CO2 action
摘要
Abstract
To investigate the evolution of the physical and mechanical properties of anthracite under the action of supercritical CO2,permeability tests and uniaxial compression experiments were conducted on dry and water-saturated anthracite specimens immersed in supercritical CO2 for different durations.The results show that supercritical CO2 significantly affects the physical and mechanical properties of anthracite.With increasing immersion time,the permeability of anthracite gradually increases,while its compressive strength and elastic modulus gradually decrease.The degradation degree of coal specimens approximately follows a logarithmic function with immersion time and a linear relationship with permeability.Water content is an important factor influencing the physic-al and mechanical properties of anthracite.Compared with dry specimens,water-saturated specimens exhibit lower compressive strength and elastic modulus but higher permeability under the same immersion time.The difference in physical and mechanical parameters caused by water content reaches its maximum at an immersion time of 5 days.With a further increase in immersion time,the overall difference in physical and mechanical parameters induced by water content shows a decreasing trend.关键词
无烟煤/CO2地质封存/超临界CO2/渗透性/力学特性Key words
anthracite/CO2 geological storage/supercritical CO2/permeability/mechanical properties分类
矿业与冶金引用本文复制引用
张凌云,胡跃飞,刘礼..超临界CO2作用下无烟煤渗透性及力学特性演化规律研究[J].煤矿安全,2026,57(5):10-18,9.基金项目
山西省基础研究计划资助项目(202303021211196) （202303021211196）
山西省基础研究计划青年科学研究资助项目(202403021212324) （202403021212324）
