辽宁工程技术大学学报（自然科学版）2017，Vol.36Issue(12)：1270-1274,5.DOI:10.11956/j.issn.1008-0562.2017.12.007
热力耦合作用下含瓦斯煤层渗透特性试验研究
Experimental study on permeability properties of coal containing gas with thermo-mechanical coupling
摘要
Abstract
In order to further study the relationship between gas permeability and temperature and stress in coal seams,this paper carried out permeability tests under different axial pressure,confining pressure,pore pressure and temperature,and microstructure scanning test of coal seam.The results of the test analysis show that under thermo-mechanical coupling,the permeability of coal containing gas is combined by six main effect factors which are coal matrix expansion,coal matrix compression,pore-cracks expansion,pore-cracks closed,gas adsorption,and gas desorption;while the pore pressure is constant,permeability decreases monotonically with increase of effective stress;while the axial-confining pressure is constant,the variation of permeability just nearly like "U" shape that reduces after increase and then flat with pore pressure increasing;with temperature increasing,coal matrix swelling resulting pore-cracks closed,coal gas expansion resulting pore-cracks expansion,and when the two phases together,permeability varies depending on which phase dominant.关键词
含瓦斯煤/渗透率/微观结构/有效应力/Klinkenberg效应Key words
coal containing gas/permeability/microstructure/effective stress分类
矿业与冶金引用本文复制引用
刘杰,张永利,崔余岩..热力耦合作用下含瓦斯煤层渗透特性试验研究[J].辽宁工程技术大学学报（自然科学版）,2017,36(12):1270-1274,5.基金项目
国家自然科学基金(51574138,51574136,51304103) （51574138,51574136,51304103）
