An experimental study of deformation and fracture characteristics of shale with pore-water pressure and under triaxial cyclic loading.

ABSTRACT: The deformation and fracture characteristics of shale in the Changning-Xingwen region were experimentally studied under triaxial cyclic loading with a controlled pore-water pressure. An RLW-2000M microcomputer-controlled coal-rock rheometer was used in the State key Laboratory of coal mine disaster dynamics and control in Chongqing University. These experimental results have indicated the following. (i) The shale softened after being saturated with water, while its failure strength decreased with the increase of axial strain. (ii) A complete cyclic loading-unloading process can be divided into four stages under the coupling action of axial cyclic loading and pore-water pressure; namely the slow or accelerated increasing of strain in the loading stage, and the slow or accelerated decreasing

SUBMITTER: Jiang C 

PROVIDER: S-EPMC6124076 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature