采矿与安全工程学报Issue(1)：168-174,7.DOI:10.13545/j.cnki.jmse.2015.01.027
温度和轴向变形耦合作用下受载含瓦斯煤渗流规律研究
Seepage rules of loaded coal containing gas under the coupling effect of temperature and axial deformation
摘要
Abstract
Using the self-made triaxial seepage experimental device, an experiment was carried out under the condition of constant confining pressure, gas pressure and different temperatures, to simulate the gas seepage process of raw coal containing gas during the coal body deformation, and build the qualitative and quantitative relations between the permeability of loaded coal containing gas and tem-perature or axial strain. The results show that:1) Axial strain has a great impact on loaded coal contain-ing gas. Before the yield step of loaded coal containing gas, the permeability has decreased with the in-crement of axial strain, and the decreasing extent decreased gradually. After the unstable failure, loaded <br> coal containing gas was broken suddenly, resulting in the permeability increasing severely to 769%. 2) Effect of temperature variation on permeability is closely associated with the stress-strain stage of coal containing gas. The experiment demonstrates that the influence of mining process on permeability of coal containing-gas can be divided into three main phases, that is, matrix expanding outward,matrix expanding inward, and slippage effect. 3) Calculation formula about the permeability of loaded coal containing gas was built suitable for the common effect of deformation and temperature, that is, k=(aT+b)εcT+d. This formula can well describe the relationship between the permeability of loaded coal containing gas and the deformation and temperature. The results can provide theoretical basis for the reveal of gas seepage law and mine gas prevention and control.关键词
轴向应变/温度/受载含瓦斯煤/渗透率Key words
axial permeability/temperature/loaded coal containing gas/permeability分类
矿业与冶金引用本文复制引用
魏建平,吴松刚,王登科,李富仁..温度和轴向变形耦合作用下受载含瓦斯煤渗流规律研究[J].采矿与安全工程学报,2015,(1):168-174,7.基金项目
国家重点基础研究发展计划(973)项目(2012CB723103)；教育部“创新团队发展计划”项目(IRT1235)；国家自然科学基金项目(51104059)；中国博士后科学基金项目(2013M531674)；河南省瓦斯地质与瓦斯治理省部共建国家重点实验室培育基地开放课题项目(WS2012B07) （973）
