Experimental Study on Strain Burst Characteristics of Sandstone Under True Triaxial Loading and Double Faces Unloading in One Direction

• Published in: Rock mechanics and rock engineering Vol. 54; no. 1; pp. 149 - 171
• Main Authors: He, Manchao, Ren, Fuqiang, Liu, Dongqiao, Zhang, Shudong
• Format: Journal Article
• Language: English
• Published: Vienna Springer Vienna 01.01.2021; Springer Nature B.V
• Subjects: Acoustic emission; Burst tests; Civil Engineering; Crack propagation; Direction; Earth and Environmental Science; Earth Sciences; Ejection; Extremum values; Fragments; Geophysics/Geodesy; Microcracks; Original Paper; Peak frequency; Sandstone; Sedimentary rocks; Shear; Strain burst; Stress propagation; Triaxial loads; Tunnels; Unloading; Velocity; Unloading double faces; Peak frequency; Fracture subregions; Ejection velocity field; Strain burst

In this study, a new strain burst test system was used to conduct two types of strain burst experiments by rapidly unloading single and double faces (in one direction), to simulate the strain burst occurring in surrounding rock of tunnel or double tunnel faces during the opposite tunneling. A high-s...