Testing Study on Mechanical Property of Carbonaceous Slate Under Dry and Saturated States
SONG Yong-jun
LEI Sheng-you
MAO Zheng-jun
ZOU Chong
ZHANG Wen-xin
Abstract：According to the engineering characteristics that carbonaceous slate of Muzhailing tunnel Lanzhou-Chongqing railway contained in fracture water and softened into water,the authors carried out basic mechanical property tests of carbonaceous slate what included triaxi-al compression,Brazil and wedge shear tests under the dry and saturated states.The results showed that the peak strength,failure strain and the elastic modulus of carbonaceous slate was accrescent with confining pressure increased before and after water filling,but Poissons ratio was decreased with confining pressure increased.Meanwhile,the dry samples strength and elastic modulus sensitivity towards the confining pressure exceed the saturated sample.The peak strength of saturated specimen was reduced compare with the dry rock,however the peak strain was improved.At the same time,the shear strength envelope was obtained based on the wedge shear tests before and after water fill-ing.Water has a significant impact on strength and deformation characteristics of carbonaceous slate.
Keywords：carbonaceous slaterock mechanicsdry and saturated statesmechanics property
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 48-52 )