黑龙江科技大学学报2024，Vol.34Issue(2)：180-187,8.DOI:10.3969/j.issn.2095-7262.2024.02.003
不同含水率及围压条件下含瓦斯煤能量变化规律
Energy variation law behind coal containing gas under different water contents and confining pressures
摘要
Abstract
This paper aims to explore the law of energy dissipation in the process of coal containing gas deformation and failure.The study consists of performing conventional triaxial tests on coal containing gas under different water contents and different confining pressures by using a self-developed testing de-vice for the coal mechanical property;and analyzing the energy variation laws of deviatoric-strain curves at specified points and different stages based on the first law of thermodynamics.The results show that under different water contents,with the increase of the confining pressure from 12 MPa to 20 MPa,the corresponding elastic energy ratio increases by 60.33%,20.11% and 13.86%,respectively.The in-crease in elastic energy ratio,failure strength and elastic modulus indicates that confining pressure has an inhibition effect on the deformation and failure of coal containing gas.Under different confining pres-sures,with the increase of water contents from 1%to 5%,the corresponding total energy decreases by 25.38%,8.78% and 6.23%,respectively.The coal containing gas is easily broken caused by the de-cline of the total energy,elastic energy and failure strength.The friction between coal particles containing gas decreases with the increase of water content,which hastens the relative movement of coal particles.关键词
煤与瓦斯突出/含瓦斯煤/常规三轴试验/含水率/围压/能量变化规律Key words
coal and gas outburst/coal containing gas/conventional triaxial test/moisture content/confining pressure/law of energy change分类
矿山工程引用本文复制引用
高霞,刘飞,杨书朋,张保勇,吴强..不同含水率及围压条件下含瓦斯煤能量变化规律[J].黑龙江科技大学学报,2024,34(2):180-187,8.基金项目
国家自然科学基金联合基金项目(U21A20111) （U21A20111）
国家自然科学基金项目(51974112) （51974112）
