变形场、煤化度和外加电场对甲烷在煤层中渗流的影响

Effects of deformation field,coallification degree and the electronic field on the seepage law of methane gas in coal

研究了变形场、煤化度和外加电场对煤物质中甲烷气体渗流的影响.结果表明,外加应力(应变)越大,渗透系数越大;当外加应力相同时,煤化程度越高,渗透系数越小;外加电场越强,渗透系数越大.得到地应力和电效应下的一维达西定律修正式.

The effects of strain field,coalification degree and externally applied electronic field on the seepage performance of methane gas in coal are studied.It is shown that,the greater the stress (strain) in coal,the less the permeability coefficient of methane gas in the coal;when the stress (strain) is the same,the higher the coallificaton degree,the less the permeability coefficient;the stronger the externally applied electric field,the greater the permeability coefficient.The modified Darcy's law under the effects of stress field and electronic field are presented.