人民长江2024，Vol.55Issue(7)：198-203,6.DOI:10.16232/j.cnki.1001-4179.2024.07.026
干湿循环作用下裂隙岩体渗流特性演化规律研究
Seepage characteristics of fractured rock mass under dry-wet cycling action
摘要
Abstract
In order to study the seepage characteristics of fractured rock mass in the water-level fluctuation zone of reservoirs,the dry-wet cycling water-rock interaction test was carried out on dolomite in Wudongde Reservoir area.Based on the single fis-sure seepage test,the evolution law of seepage characteristics of fractured rock mass under the action of dry-wet cycling was studied,and the anisotropic seepage characteristics of fractured rock mass were studied by theoretical analysis method.The results showed that when the confining pressure was constant,the seepage flow of single crack increased linearly with the increase of seepage water pressure.When the seepage water pressure was constant,the seepage flow decreased exponentially with the increase of confining pressure.With the increasing of water-rock interaction period,the fracture seepage flow decreased suddenly and then slowly increased.The permeability characteristics of fractured rock mass had obvious anisotropy,the principal permeability coeffi-cient and permeability tensor decreased,the radius of permeability ellipse increased,and the principal permeability direction re-mains unchanged after water-rock interaction.关键词
裂隙岩体/渗流特性/渗流量/各向异性/渗透椭圆/干湿循环/乌东德库区Key words
fractured rock/seepage characteristics/seepage flow/anisotropy/permeability ellipse/dry-wet cycling/wud-ongde Reservoir area分类
建筑与水利引用本文复制引用
施炎,王团乐,宛良朋,孙旭曙,左小鹏,郭晓萍..干湿循环作用下裂隙岩体渗流特性演化规律研究[J].人民长江,2024,55(7):198-203,6.基金项目
中国三峡建工(集团)有限公司科研项目(WDD/0569) （集团）
国家自然科学基金联合基金项目(U2034203) （U2034203）
国家自然科学基金青年基金项目(52009067) （52009067）
