A force-indentation model for brittle rocksRock Mechanics and Rock Engineering - Tập 22 - Trang 127-148 - 1989
S. S. Pang, W. Goldsmith, M. Hood
A force-deformation model is developed for localized loading of brittle rocks that depicts the action of a percussive drill bit. This model consists of a series of successive cycles each of which is composed of a crushing and a chipping phase. Crushing involves the fragmentation or comminution of individual grains or grain clusters and is manifested by an increase in the applied force, while chipp...... hiện toàn bộ
Focal Mechanism of Strong Ground Seismicity Induced by Deep Coal MiningRock Mechanics and Rock Engineering - Tập 56 - Trang 779-795 - 2022
Kunbo Wu, Junpeng Zou, Yu-Yong Jiao, Xiufeng Zhang, Chao Wang
In recent years, strong seisms are triggered frequently during deep coal mining process, which seriously threatens the safety of underground miners and ground residents, as well as restricts the productivity and effectiveness of mining activities. It is essential to investigate focal mechanisms and source parameters of seisms for understanding the rock fracturing, the rupture scale and the failure...... hiện toàn bộ
Rate Effects on Shear Deformation of Rough Limestone DiscontinuitiesRock Mechanics and Rock Engineering - Tập 52 Số 6 - Trang 1613-1622 - 2019
Morad, Doron, Hatzor, Yossef H., Sagy, Amir
The relationship between slip velocity, resistance to shear, and geometrical evolution of initially rough limestone surfaces is investigated in servo-controlled direct shear experiments. We focus on shear stress evolution throughout the deformation process, as function of the shear rates applied. Direct shear tests are performed on tensional fractures positioned in a perfectly mating configuration...... hiện toàn bộ
An Analytical Model for Assessing Dynamic Stability of Bedding Rock Slope with Soil Interlayer Under Different Rain PatternsRock Mechanics and Rock Engineering - - Trang 1-20 - 2023
Haibing Yu, Huiming Tang, Jia-Qing Zhou, Changdong Li, Huawei Zhang, Wen-Yu Zhu
This study investigated a dynamic stability analytical model for bedding rock slope with soil interlayer, considering various rain patterns. The critical rain intensities for anhydrous and water-filled fissure were derived, respectively. Rain coefficients (i.e., concentration and peak position coefficients) were subsequently introduced to investigate rain patterns. The evolving water head under di...... hiện toàn bộ
An Elasto-Plastic Damage Model for Rocks Based on a New Nonlinear Strength CriterionRock Mechanics and Rock Engineering - Tập 51 - Trang 1413-1429 - 2018
Jingqi Huang, Mi Zhao, Xiuli Du, Feng Dai, Chao Ma, Jingbo Liu
The strength and deformation characteristics of rocks are the most important mechanical properties for rock engineering constructions. A new nonlinear strength criterion is developed for rocks by combining the Hoek–Brown (HB) criterion and the nonlinear unified strength criterion (NUSC). The proposed criterion takes account of the intermediate principal stress effect against HB criterion, as well ...... hiện toàn bộ
Ground stress determinations in CanadaRock Mechanics and Rock Engineering - Tập 6 - Trang 53-64 - 1974
G. Herget
Stress determinations with the biaxial (Doorstopper) and the triaxial strain cell of the C. S. I. R., South Africa, are discussed and show that the triaxial cell is the more desirable instrument if good rock conditions exist. Vertical and average horizontal stresses in Canada are similar in magnitude to those from other parts of the earth's crust and show that vertical stresses are related to weig...... hiện toàn bộ
Study on the Mechanism of Rock Damage Under Microwave and Laser Irradiation Through Multiscale and Multiphysics Numerical ModellingRock Mechanics and Rock Engineering - - Trang 1-24 - 2023
Fuxin Rui, Gao-Feng Zhao, Yuliang Zhang, Lifeng Fan, Xiaobao Zhao
High-energy microwaves and lasers are applied to assist mechanical rock breaking due to their advantages in rapid thermal damage to hard rocks. However, the quantitative evaluation of rock damage under microwave and laser irradiation has always been a difficult problem. In this study, a multiscale and multiphysics numerical modelling approach is developed to quantitatively describe rock thermal da...... hiện toàn bộ