Experimental Study on the Mechanical Characteristics of Single-Fissure Sandstone Under Triaxial Extension

Numerical study on cracking behavior and fracture failure mechanism of flawed rock materials under uniaxial compression

“…[1][2][3][4][5][6] These discontinuous structural planes heavily affect the bearing capacity and failure process of flawed rocks under the action of external compressive stress. [7][8][9][10] Namely, these flaws can weaken the stiffness and strength of flawed rock mass. 7,10 Moreover, the tips in the pre-existing flaws can easily become the sources that new cracks initiate, propagate and link, which further results in the weakening of the mechanical properties of flawed rocks.…”

“…7,10 Moreover, the tips in the pre-existing flaws can easily become the sources that new cracks initiate, propagate and link, which further results in the weakening of the mechanical properties of flawed rocks. 8,9 Consequently, investigating the cracking process and fracture failure mechanism of flawed rocks is rather essential for evaluating the security and stability of engineering rock mass, such as rocky slopes, deep mining, and underground hydropower station.…”

“…Up to now, numerous experimental studies have been performed to primarily investigate the mechanical properties and fracture characteristics of different types of flawed rocks like granite, marble, sandstone, and rocklike materials. [1][2][3][4][5][8][9][10][11][12][13][14][15][16][17][18] For example, Yin et al 12 investigated the coalescence behaviors of double parallel surface flaw-contained granite specimens subjected to uniaxial compression through the digital speckle correlation technology. Li et al 17 carried out uniaxial compression tests on marble specimens with two elliptic holes to study the effects of dip angle on the mechanical properties and cracking behaviors of flawed rocks.…”

“…Li et al 17 carried out uniaxial compression tests on marble specimens with two elliptic holes to study the effects of dip angle on the mechanical properties and cracking behaviors of flawed rocks. Liu et al 9 studied the mechanical characteristics and failure modes of single flaw-contained sandstone with different dip angles under triaxial extension. Zhao et al 13 conducted uniaxial compression tests on rock-like specimens to analyze their real-time cracking behaviors and to focus on the stressstrain behaviors around the tips of pre-existing flaws.…”

Study on failure mechanism of tight sandstone based on moment tensor inversion

“…The results show that the Fracture toughness of sandstone is linearly related to the confining pressure. Liu et al [9] studied the mechanical properties of rocks containing defects under triaxial tension. The results indicate that confining pressure significantly impacts the failure strength of rock-containing defects.…”