... penny-shaped microcracks in rock blocks separated by multiple sets of critically orientated fractures of large scales. This is an anisotropic coupled thermal-hydro-mechanical model for deformed saturated rock masses, which is capable of considering the alteration of macro-meso discontinuities...

... Abstract A rock mass has a large number of macroscopic and microscopic defects, such as joint cracks and microcracks, which greatly affect its physical and mechanical properties. In this study, a multiscale elastoplastic damage model was proposed to describe the influence of the existence...

... degree of rock, and the size of the damage variable is closely related to the initiation, propagation, and transfixion of microcracks inside the rock. When the loading rate is low, the damage degree of red sandstone at the damage stress is usually more prominent because the rock's microcrack develops...

... Abstract The excavation damaged zone (EDZ) of a high-level radioactive waste (HLW) disposal repository is a key factor related to long-term safety. The essence of the damage evolution of rocks is the development of microcracks, which change the ultrasonic velocity, suction curve, and gas...

... characteristic journal microcrack shale propagation 0 11th Conference of Asian Rock Mechanics Society IOP Publishing IOP Conf. Series: Earth and Environmental Science 861 (2021) 022018 doi:10.1088/1755-1315/861/2/022018 Study on Acoustic Emission Characteristics and Damage Evolution of Shale under...

... hydraulic fracturing geology geological subdiscipline fracture toughness geologist wellbore design reservoir geomechanics reservoir characterization plane mode microcrack society iop publishing iop conf propagation university environmental science 861 granite engineering...

... granite reservoir geomechanics specimen stepwise loading beishan granite mech sci hydraulic fracturing geological subdiscipline environmental science 861 microcrack tertiary creep 11th Conference of Asian Rock Mechanics Society IOP Publishing IOP Conf. Series: Earth and Environmental Science...

... elucidate the mechanisms responsible for temperature-dependent mechanical properties of granites, from a perspective of microcracking. Both SEM observations and DEM simulations give consistent results and show that there exists a temperature threshold beyond which the thermally-induced microcracks increase...

... microcracks in the rock. Thermal conductivities of the treated specimens under dry and water-saturated conditions were determined using the Transient Plane Source (TPS) method, and the effect of water saturation on the thermal conductivity was investigated. The influences of temperature and axial compression...

... Abstract It is possible to obtain the information of the preferred orientation of microcracks in granite by the measurement of the P-wave velocity, because the value of P-wave velocity is directly related to the density of microcracks. Therefore, we can obtain the information of three...

... changes. To obtain further insights into the deterioration of granite by repeated stress changes, changes in elastic properties of specimens during the test were analyzed and microcrack growth patterns within specimens stressed to the different stages were observed. Cylindrical Westerly granite specimens...

... to study fracturing around a gold-mine stope in quartzite. hydraulic fracturing strength porous rock reservoir geomechanics Upstream Oil & Gas microcrack Potyondy Artificial Intelligence compact rock microstructural feature sandstone loading interface specimen base material Rock...

... observation. The fluorescent method was applied to identify microcracks within the specimens. At the initial degradation stage, distinguishing crack growth was identified in quartz grains. It is estimated that the candidate portions of crack growth were damaged at the first or early loading. At the second...

... that the material can withstand, the energy release will occur to reestablish the internal energy level within a tolerable limit. Griffith [4] suggested that a potential relief mechanism is the micro-cracking. According to his theory the excess of energy is dissipated with the growth of microcracks during rock...

... to the CT machine. Through the CT scanning, the clear CT images were obtained includingthe microcracks compressed. growth, bifurcation. development .crack fracture, the rock sample failure and the unloading stage in thedifferent stress slates. The CT values, CT images and the other data have been analyzed...