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Effect of Confining Pressure on the Compression-shear Fracture Properties of Sandstone by Jiuzhou Huang; Wen Hua; Dengsong Li; Xiang Chen; Xutao You; Shiming Dong; Jianxiong Li is a Engineering article available to read on EtoBox.
What is Effect of Confining Pressure on the Compression-shear Fracture Properties of Sandstone about?
The fracture characteristics of the deep rocks are susceptible to the influence of the confining pressure. Quantities of fracture tests were carried out on cracked Brazilian disc specimens to investigate the compression-shear fracture properties of sandstone materials exposed to confining pressure using the self-developed triaxial experimental system. Furthermore, the sensitivities of failure load, fracture toughness and crack propagation to the confining pressure and geometric parameters of the specimen were evaluated. The results indicate that the confining pressure environment contributes to the increase in the strength of the sandstone. The fracture toughness components ( K If and K IIf ) of sandstone specimens satisfy linear correlation with the confining pressure at confining pressures from 0 to 6 MPa. Similarly, the effective fracture toughness ( K eff ), adequately reflecting the strengthening effect of confining pressure, satisfies a linear growth relationship with the confining pressure if the confining pressure is large enough (i.e., the confining pressure coefficient t > 1). Moreover, the crack propagation characteristics may still exhibit a tensile-shear mode under the
Who reads Effect of Confining Pressure on the Compression-shear Fracture Properties of Sandstone?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Jiuzhou Huang; Wen Hua; Dengsong Li; Xiang Chen; Xutao You; Shiming Dong; Jianxiong Li
- Publisher
- Elsevier BV
- Published
- 2023
- Language
- EN
- Field
- Engineering (Physical Sciences)