TY - JOUR
TI - Confining pressure effect on the permeability and mechanical behavior of sandstone under a certain pore water pressure condition
AU - Ling Wei-Qiang
AU - Xie He-Ping
AU - Li Yi-Hang
AU - Zhang Ze-Tian
AU - Ren Li
JN - Thermal Science
PY - 2023
VL - 27
IS - 1
SP - 647
EP - 654
PT - Article
AB - In geotechnical engineering, the mechanical behavior of rocks under various  In-situ conditions (stress state including axial stress, confining pressure,  pore water pressure) have always been an important topic. Therefore, the  confining pressure effect on the permeability and mechanical behavior of  different size sandstone samples under a certain pore water pressure  condition was studied. The permeability of different sizes samples shows  roughly the same exponential de-creasing law with the increase of confining  pressure. In the mechanical behavior test, both the loading Young's modulus  E+ and the unloading Young's modulus E- increased continuously with  increasing confining pressure, while the unloading Poisson's ratio m -  decreased to a certain value and then remained almost constant.