ESTIMATION OF THE PERMEABILITY ON DISCONTINUOUS ROCK MASS BASED ON TWO-DIMENSIONAL NUMERICAL ANALYSES

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  • 二次元割れ目系モデルによる岩盤の透水性評価に関する研究
  • 2次元割れ目系モデルによる岩盤の透水性評価に関する研究
  • 2ジゲン ワレメケイ モデル ニ ヨル ガンバン ノ トウスイセイ ヒョウカ

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Abstract

The objective of the present paper is to study estimations of the permeability on discontinuous rock mass.<br>Firstly, two-dimensional numerical analyses on seepage flow through geological discontinuities (called joints) are carried out to examine the theory proposed by Oda. Especially, the effect of the aperture distribution of joints on the permeability tensor is examined in detail. Secondly, the field method, known as the Lugeon test, is investigated on the scale effect of the packed-off interval (stage length). This effect on the estimation is discussed with the results from the numerical analyses.<br>Finally, the effects of the aperture distribution of joints and the packed-off interval on estimations of the permeability are demonstrated.

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