Guo Yu

TL;DR: In this article, the anisotropic characteristics of the effective stress coefficient for sandstone under different true triaxial stress and pore pressure conditions were investigated, and the results showed that effective stress coefficients exhibited anisotropy due to the different principal strains in three directions and the annessotropy of pore structure, and it is closely linked with the pore fluid flowing through highly compressible clay aggregates.

TL;DR: In this paper, the authors investigated the influence of temperature on sandstone failure process, and the cyclic loading and unloading tests under the action of seepage and stress were carried out on sandstones after different temperature (25-800°C) treatments.

TL;DR: In this article, the authors used the YSSZ-500A rheological tester to investigate the acoustic emission characteristics of coal seam roof rock under uniaxial compression, and analyzed the fracture mode and energy damage mechanism in the progressive failure process, and study the damage characteristics of rock samples from the perspective of damage mechanics.

TL;DR: In this article, the pore size distribution and micromorphology of sandstone were observed by nuclear magnetic resonance and scanning electron microscopy, and a thermal elastic mechanical model of randomheterogeneous rock was established for the rock unit.

TL;DR: In this paper, the authors analyzed the evolution characteristics of rock permeability in each cyclic loading and unloading process, and the permeability of different samples were compared, showing that the initial permeability values of rock treated at different temperatures clearly varies.