Rock Mechanics and Rock Engineering

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A force-indentation model for brittle rocks
Rock 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
An Elasto-Plastic Damage Model for Rocks Based on a New Nonlinear Strength Criterion
Rock 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
PKN Solution Revisit: 3-D Hydraulic Fracture Size and Stress Anisotropy Effects
Rock Mechanics and Rock Engineering - Tập 51 - Trang 653-660 - 2017
Jincai Zhang, Yushuai Zhang, Shangxian Yin
Numerical Investigation on Anisotropy and Shape Effect of Mechanical Properties of Columnar Jointed Basalts Containing Transverse Joints
Rock Mechanics and Rock Engineering - Tập 55 - Trang 7191-7222 - 2022
Yongyi Wang, Bin Gong, Chun’an Tang
We studied the non-linear mechanical response and failure mechanism of columnar jointed basalts (CJBs) with transverse joints by modeling meso-mechanics, statistical damage theory and continuum mechanics. The anisotropy and shape effect of CJBs with transverse joints were captured under different lateral pressures. The digital images were transformed into heterogeneous element meshes, and the grad...... hiện toàn bộ
Elastoplastic Damage Behavior of Rocks: A Case Study of Sandstone and Salt Rock
Rock Mechanics and Rock Engineering - Tập 56 - Trang 5621-5634 - 2023
Xiangsheng Chen, Yinping Li, Lihong Tong, Daxin Geng, Zhikai Dong, Peiliang Yang
Experimental results provide strong evidence that the deformation and strength of rocks are closely related to the damage suffered during loading. The classic constitutive models such as Mohr–Coulomb criterion and the Drucker–Prager criterion are usually unable to describe the non-linear deformation behavior of rocks, including strain hardening and softening. Their applications in numerical analys...... hiện toàn bộ
The Applicability of the Ground Response Curve to Tunnelling Problems that Violate Rotational Symmetry
Rock Mechanics and Rock Engineering - Tập 45 - Trang 1-10 - 2011
R. Schürch, G. Anagnostou
The applicability limits of the closed-form solution to the problem of ground response to tunnelling are sounded out by systematically investigating the effect of deviations from some of the important assumptions underlying the closed-form solution. The ground response curve (GRC) expresses the relationship between tunnel support pressure and the radial displacement of the tunnel boundary on the b...... hiện toàn bộ
In-situ Measurements of Cutter Forces on Boring Machine at Äspö Hard Rock Laboratory Part II. Characteristics of Cutter Forces and Examination of Cracks Generated
Rock Mechanics and Rock Engineering - Tập 36 - Trang 63-83 - 2003
Z. X. Zhang, S. Q. Kou, P.-A. Lindqvist
By means of spectral analysis, the measured normal forces, tangential forces, and side forces acting on two button cutters on the boring machine in Äspö Hard Rock Laboratory were analysed and the basic characteristics of the cutter forces were determined. After the measurements of the cutter forces, some rock core samples were taken from the bottom and the wall of the test borehole. These samples...... hiện toàn bộ
Multi-Modal Monitoring of Slip Along Frictional Discontinuities
Rock Mechanics and Rock Engineering - Tập 47 - Trang 1575-1587 - 2014
Ahmadreza Hedayat, Laura J. Pyrak-Nolte, Antonio Bobet
Seismic wave transmission and digital image correlation (DIC) are employed to study slip processes along frictional discontinuities. A series of biaxial compression experiments are performed on gypsum specimens with non-homogeneous contact surfaces. The specimens are composed of two blocks with perfectly mated contact surfaces with a smooth surface with low frictional strength on the upper half an...... hiện toàn bộ
Estimation of the Strength of Stratified Rock Mass
Rock Mechanics and Rock Engineering - Tập 47 - Trang 535-547 - 2013
Theodoros Triantafyllidis, Eleni Gerolymatou
Stratified rock formations are often encountered in engineering structures with large dimensions, such as tunnels, caverns, etc. In the present work, the question of how and when such materials fail is addressed. It is argued that average values cannot provide appropriate measures for the strength of layered rock, as local stresses and strains differ greatly in the various constituents and one may...... hiện toàn bộ
Study of the Anisotropic Properties of Argillite Under Moisture and Mechanical Loads
Rock Mechanics and Rock Engineering - Tập 46 - Trang 247-257 - 2012
Diansen Yang, Serge Chanchole, Pierre Valli, Liufeng Chen
Due to various factors, such as sedimentation, layered morphology of clay minerals, in situ stress, etc., argillite rocks often exhibit anisotropic behavior. In order to study the anisotropic properties of the Callovo-Oxfordian (COx) argillite of the Meuse–Haute-Marne site in France considered as a possible host rock for high-level radioactive nuclear waste repository, a series of tests including ...... hiện toàn bộ
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