文献类型：期刊文献

中文题名：煤层等温吸附渗透率演化数值研究

英文题名：Numerical Study on Permeability Revolution of Coal Seams Under Isothermal Adsorption Condition

作者：崔波 肖利平 张开智

第一作者：崔波

机构：[1]贵州理工学院采矿工程学院

第一机构：贵州理工学院矿业工程学院

年份：2016

卷号：47

期号：3

起止页码：13-16

中文期刊名：煤矿安全

外文期刊名：Safety in Coal Mines

收录：CSTPCD;;北大核心:【北大核心2014】；

基金：贵州省科技厅科技合作计划资助项目(黔科合LH字[2015]7107);贵州省教育厅招标资助项目(黔教合KY字[2015]353)

语种：中文

中文关键词：渗透率;煤基质;孔隙压力;吸附应变;体积应变;Biot系数

外文关键词：permeability; coal matrix; pore pressure; adsorption strain; volumetric strain; Biot coefficient

摘要：通过建立双孔隙度煤层变形控制方程,确定了基于煤层吸附理论的Biot孔隙压力系数。分别建立了存在吸附作用的条件下,煤层基质和裂隙渗透率的数值模型。研究发现,通过增加基质孔隙压力,基质将发生与孔隙压力相关的体积应变,基质体积模量将会减小;基质增大的体积占据了部分孔隙,导致煤层基质渗透率减小;随着吸附的进行,经过一定时间,煤层裂隙渗透率会出现陡降。
The control equation of deformation in dual porosity coal seam is established and Biot pore pressure coefficient based on the theory of adsorption in coal seams is identified. The numerical models of coal matrix and fracture permeability were established respectively under the condition of adsorption. By increasing pore pressure of the matrix,matrix volumetric strain will occur and matrix volume bulk modulus will decrease. The increased volume of matrix occupies part room of pore,which results in the decrease of the coal seam permeability. With the adsorption of matrix,after a certain time,coal bed fracture permeability appears steep fall.