煤矿安全2019，Vol.50Issue(10)：9-13,5.DOI:10.13347/j.cnki.mkaq.2019.10.003
煤矿区煤层气抽采的多物理场耦合模型及应用
Multi-physics Coupling Model of Coal and Coal-bed Methane Extraction in Mining Area and Its Application
摘要
Abstract
Based on the principle of effective stress considering the expansion stress of coal rock, the porosity and permeability of coal reservoir dynamic change model is established considering the effect combination of coal matrix deformation and the effective stress caused by the gas pressure. Combined with stress field equation of coal rock deformation and gas seepage field equation, the multi-physical field coupling model in coal mining area is established. No.3 coal seam of Shanxi group in southern Qinshui Basin is taken as a geological model and Comsol-Multiphysics is used for numerical simulation, the change of pore pressure field is analyzed under the different parameters and different working conditions in the coal seam. The research results show that CBM extraction is mainly influenced by the buried depth of coal seam, porosity and permeability, which is less affected by the negative extraction pressure.关键词
煤层气抽采/孔隙度/渗透率/多物理场耦合/数值模拟Key words
coal-bed methane extraction/porosity/permeability/multi-physics coupling/numerical simulation分类
矿业与冶金引用本文复制引用
张娟,张媛,吴迪..煤矿区煤层气抽采的多物理场耦合模型及应用[J].煤矿安全,2019,50(10):9-13,5.基金项目
国家自然科学基金资助项目(51708310) （51708310）
山东省自然科学基金资助项目(ZR2017BEE066) （ZR2017BEE066）
青岛滨海学院校级科技计划研究资助项目(2018KZ03) （2018KZ03）
