CAJ | 학술논문

煤层气渗透率的高低直接决定了煤层气井单井产量。为了研究真实地应力状态下煤样渗透率与地应力的关系，利用实验室自主研制的国内首台真三轴三维渗流物模装置，对沁水盆地南部晋城寺河矿区煤样进行三轴应力独立阶梯递增和递减加载下的渗流实验，发现垂直应力对煤样渗透率的影响程度最大，得出在增压和减压过程中三维渗透率与地应力的耦合关系式，符合经典的岩石流固耦合模型中的幂律模型。
매층기삼투솔적고저직접결정료매층기정단정산량。위료연구진실지응력상태하매양삼투솔여지응력적관계，이용실험실자주연제적국내수태진삼축삼유삼류물모장치，대심수분지남부진성사하광구매양진행삼축응력독립계제체증화체감가재하적삼류실험，발현수직응력대매양삼투솔적영향정도최대，득출재증압화감압과정중삼유삼투솔여지응력적우합관계식，부합경전적암석류고우합모형중적멱률모형。
The permeability of coal seam directly determines the well yield of coalbed gas well.In order to study the relationship between permeability of coal samples and ground stress under real ground stress state,using the domestic first true triaxial 3D seepage model device in-dependently designed in the laboratory,seepage experiments of coal samples were conducted un-der progressively increasing or decreasing triaxial stress, and the coal samples were from Jincheng Sihe mining area in southern Qinshui Basin.The results showed that vertical stress had greatest incidence to permeability of coal samples,the coupling relation between 3D permeability and ground stress was made,which conformed with the power law model of classical rock fluid-structure interaction model.