Seepage Flow Properties of a Columnar Jointed Rock Mass in a True Triaxial Experiment
نویسندگان
چکیده
A columnar jointed rock mass is a type of with strong geometric anisotropy and high interface permeability. Its seepage characteristics pose new challenges to the construction maintenance Baihetan Hydropower Station on Jinsha River. The research object in this study (basalt) dam area Station. Similar-material model samples different column dip angles ( α = 0 ° ~90°) were prepared following similar principle. true triaxial seepage–stress coupling test was conducted evaluate similar-material under intermediate principal stress minimum stress. experimental results showed that exhibited apparent anisotropy. relationship curve between volume flow rate id="M2"> Q pressure gradient id="M3"> − d P / L evident nonlinear stress, which could be well expressed using Forchheimer equation. It shows typical linear Darcy law variations permeability can one-dimensional quadratic function equation id="M4"> k a + b σ 2 c , logarithmic id="M5"> ln 3 . permeabilities 0°, 15°, 30°, 60° most sensitive changes increased complexity after
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ژورنال
عنوان ژورنال: Geofluids
سال: 2021
ISSN: ['1468-8115', '1468-8123']
DOI: https://doi.org/10.1155/2021/9924230