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Insight into the elastoplastic behavior of Beishan granite influenced by temperature and hydraulic pressure Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-04-30 Haiyang Yi, Hongwei Zhou, Olaf Kolditz, Dongjie Xue
Granite is an ideal host rock for high-level radioactive waste (HLW) repositories. In the deep environment of HLW repositories, granite is subjected to variable temperature and hydraulic pressure. In order to investigate the influence of temperature and hydraulic pressure on the elastoplastic behavior of the Beishan granite, the present paper implemented a set of triaxial compression experiments at
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A stacked deep multi-kernel learning framework for blast induced flyrock prediction Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-04-27 Ruixuan Zhang, Yuefeng Li, Yilin Gui, Danial Jahed Armaghani, Mojtaba Yari
Blasting operations are widely and frequently used for rock excavation in Civil and Mining constructions. Flyrock is one of the most important issues induced by blasting operations in open pit mines, and therefore needs to be well predicted in order to identify the safety zone to prevent the potential injuries. For this purpose, 234 sets of blasting data were collected from Sungun Copper Mine site
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Freezing deformation of saturation-dependent porous media considering interface energy and microstructure effects: From thermodynamics-based macroscopic constitutive relation to micromechanical upscaling model Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-04-27 Weiqi Guo, Jinhui Tang, Fengjuan Wang, Jinyang Jiang, Wenxiang Xu
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Deliquescence and salt transport in damaged rock salt under humidity cycling: Experimental and theoretical analysis Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-04-25 Zhen Zeng, Hongling Ma, Kai Zhao, Youqiang Liao, Chunhe Yang
Salt caverns used for compressed air energy storage (CAES) undergo daily humidity cycling. The damaged surrounding rock contains extremely high deliquescent sodium chloride (NaCl) levels. This study used experimental and theoretical approaches to examine the dynamic deliquescence and salt transport behavior of damaged rock salt under humidity cycling. We uniaxially compressed rock salt to different
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Transparent gelatin as a reservoir analogue: Dimensional scaling for hydraulic fracturing laboratory experiments Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-04-25 Andreas Michael
Gelatin is frequently used as a reservoir analogue for modeling hydraulic fracture (HF) growth in brittle, organic-rich rocks; its transparency enabling direct, visual observation of the HF growth. However, not many works have assessed the scalability of laboratory experiments on gelatin blocks with-respect-to “real-world” HF stimulation treatments. In this work, lab-scale parameters are compared against
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Experimental investigation of the hydro-mechanical response of soft rocks in the CO2 injection process - Impacts of fracture roughness and brittleness index on the evolution of permeability behavior Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-04-24 Takashi Fujii, Yasuki Oikawa, Xinglin Lei, Masao Sorai
Understanding the hydro-mechanical response of a reservoir and its surrounding rocks to the CO pressure build-up during CO injection process is a key challenge in the safe implementation of CO capture and storage (CCS) technologies. These responses are expected to depend on the type of formation properties, such as hardness of the reservoir rocks. This study investigates permeability behavior of various
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Strain energy dependent numerical simulation of rock fracture initiation and propagation using soundless cracking demolition agents (SCDA): Effects of SCDA-filled rock joints Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-04-18 V.R.S. De Silva, H. Konietzky, Ranjith P.G., U.I. Manatunga
Soundless Cracking Demolition Agents (SCDA) are gaining traction as an innovative technique for controlled rock fracturing in applications such as underground energy, mineral extraction, and excavation. This paper presents a novel numerical approach to simulate SCDA-charged rock fracture initiation using the strain energy density of SCDA. This approach eliminates the need for prior knowledge of the
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A micromechanics-based model for rocks exhibiting microcrack-induced damage in plastic solid matrix Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-04-18 Y. Shi, W.Q. Shen, J.F. Shao
This work is devoted to modeling plastic deformation and microcrack-induced damage in quasi-brittle rocks under compression-dominating stresses. At the microscopic scale, a set of randomly distributed microcracks are embedded in an isotropic elastic–plastic solid matrix. The plastic deformation, microcrack propagation and frictional sliding are inherently coupled. By combining a rigorous homogenization
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Water weakening and the compressive brittle strength of carbonates: Influence of fracture toughness and static friction Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-04-17 Corentin Noël, Barnaby Fryer, Patrick Baud, Marie Violay
Water is ubiquitous within the pore space of rocks and has been shown to affect their physical and mechanical behaviour. Indeed, water can act on the rock strength via mechanical (i.e., reducing the effective stresses) or chemical effects (e.g., mineral dissolution, mineral alteration, subcritical crack growth, etc.). As rock macroscopic strength is controlled by both fracture toughness and friction
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A phase-field model for blasting-induced failure and breakage analysis in rock masses Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-04-16 Sijia Liu, Miaomiao Kou, Zaiquan Wang, Yongjun Zhang, Fei Liu
In this work, we propose a new phase-field formulation with dynamic JH2 constitutive model in the updated Lagrangian finite element framework for capturing the blasting-induced failure and breakage phenomena in rock masses. We innovatively formulate phase-field evolution by taking mechanical strengths and failure/breakage characteristics of rock materials at intact and residual states under dynamic
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Permeation–strain characteristics and damage constitutive model of coal samples under the coupling effect of seepage and creep Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-04-15 Qiangling Yao, Yong Li, Xuehua Li, Liqiang Yu, Chuangkai Zheng
Developing and utilizing mining water resources in ecologically fragile mining areas in western China require underground reservoir technologies. However, the creep and permeability of coal pillar dams under the coupling of overburden pressure and stock water seepage are not well understood. This hinders the control of their long-term stability. This study aimed to reveal these features by examining
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Pressure monitoring and deformation analysis of a brine-filled salt cavern - A case study of Jianghan, China Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-04-11 Peng Li, Yinping Li, Xilin Shi, Xinxing Wei, Kun Yang, Hongling Ma, Chunhe Yang, Wei Hu, Hao Xu
Deformation stability plays a crucial role in the construction and operation of hydrocarbon storage salt caverns. Monitoring and analyzing wellhead pressure data under closed well conditions provide valuable insights into the evaluation of cavern stability. In this study, an analysis of five factors influencing internal brine pressure was conducted, which revealed that salt creep and brine thermal
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A machine learning-assisted nondestructive testing method based on time-domain wave signals Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-04-11 Zhuoran Tian, Jianchun Li, Xing Li, Zhijie Wang, Xiaozhou Zhou, Yang Sang, Chunjiang Zou
The nondestructive testing (NDT) of defects in structure members or geological bodies is essential in engineering survey and construction. Given the complexity of natural rock or rock masses, the NDT of defects within them is extremely challenging in geotechnical engineering. Previous studies predominantly utilized singular or limited features of waveforms, which neglected much information in the signals
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Prediction of rockfall hazard in open pit mines using a regression based machine learning model Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-04-10 I.P. Senanayake, P. Hartmann, A. Giacomini, J. Huang, K. Thoeni
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Combined acoustical-electrical modeling for tight sandstones verified by laboratory measurements Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-04-09 Mengqiang Pang, Jing Ba, José M. Carcione, Erik H. Saenger
Tight sandstone reservoirs basically have low porosity and permeability, a complex pore structure and a heterogeneous distribution of immiscible fluids. With the development of theoretical models, it is common to characterize rock properties, i.e., pore structure, microfractures, fluid type and saturation, etc., based on acoustic and electrical properties. We have taken four tight sandstone samples
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Development and experimental verification of a new model for predicting laser-induced rock cutting slit depth Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-04-09 Zonglin Li, Zhenliang Zhou, Zhongsheng Tan, Zhen Guo, Lilong Zhang
High-energy laser beams have a powerful ability to induce rock fragmentation, but there is still a lack of suitable calculation methods to quantitatively predict the laser-induced rock cutting slit depth. This work aims to provide a new predictive model for the quantitative determination of the laser rock cutting slit depth. In this paper, based on the energy consumption model of laser-induced rock
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True triaxial energy evolution characteristics and failure mechanism of deep rock subjected to mining-induced stress Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-04-05 Heng Gao, Heping Xie, Zetian Zhang, Jun Lu, Dongming Zhang, Ru Zhang, Mingyang Wu
In deep rock engineering, complex stress conditions are encountered, which leads to difficulties in engineering disaster prevention and control. To investigate the failure behaviors and mechanisms of deep rock mining, a series of tests was designed for mining-induced failure at different simulated depths using a multifunctional true triaxial geophysical (TTG) apparatus. The results showed that both
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Intelligent prediction method for underbreak extent in underground tunnelling Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-04-04 Ming Tao, Zhixian Hong, Huatao Zhao, Mingsheng Zhao, Dong Wang
Underground tunnel excavation using the drill-and-blast method often results in underbreak occurrences due to improper blasting parameters and complex geological environment. This underbreak phenomenon has a profound impact on tunnel safety, stability and construction costs. Traditional approaches for predicting underbreak extent () through field measurements and theoretical models exhibit limitations
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A unified model for frost wedging in an open fissure under unidirectional freezing Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-04-04 Peichao Zheng, Xianjun Tan, Hailiang Jia, Kai Shen, Zhouzhou Su, Yun Zhou, Reziwanguli Shataer, Yi Xie, Dong Wang, Siming Tian, Wei Wang, Weizhong Chen
The propagation of joints and fissures, included by the frost heaving pressure arising from the water-ice phase transition is considered as frost wedging. This process is widely observed and plays a crucial role in weathering of jointed hard rocks in cold regions. Despite some fundamental results achieved in former experimental studies, a unified theoretical model is still absent, hindering a thorough
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Mechanical and fracturing characteristics of defected rock-like materials under biaxial compression Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-04-02 P.X. Ji, G. Viegas, Q.B. Zhang
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Multiphysics phase-field modeling for thermal cracking and permeability evolution in oil shale matrix during in-situ conversion process Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-30 ChengSi Lyu, Hao Yu, Juan Jin, WenLong Xu, HanWei Huang, JiaNing Zhang, Quan Wang, JianDong Liu, WeiDong Jiang, He Liu, HengAn Wu
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Integrating transient pressure and flow data for determination of hydraulic permeability and specific storage of a shale sample: Experimental tests and sensitivity analysis Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-30 Insun Song, Eunjin Seo
This paper describes a comprehensive investigation to accurately determine the hydraulic permeability and the specific storage of a shale sample. One-dimensional pressure transient tests were conducted on a cylindrical sample under various levels of pore and confining pressures. For the boundary conditions, the upstream pressure was kept constant using a syringe pump, and the downstream storage was
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Non-break modeling and numerical simulation for non-intact rock failure process Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-28 Gen Li, Kai Wang, Chun'an Tang, Jiahao Ye
Simulation of the failure process of non-intact rock containing initial cracks, voids, and other discontinuities is a research hotspot in rock mechanics and geotechnical engineering. The damage smear method has attracted wide attention due to its ability to realistically depict the complete failure processes of rock from the microscopic to the macroscopic scale. However, when portraying pre-existed
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Theoretical analysis of the interaction between blasting stress wave and linear interface crack under high in-situ stress in deep rock mass Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-26 Xiao Guo, Chenxi Ding, Peijun Wei, Renshu Yang
This study theoretically investigates the scattering characteristics of blasting stress waves, treaded as elastic waves, at a linear interface crack in a deep rock mass with an even compressive in-situ stress field. First, the basic equations of the deep rock mass theoretically treaded as a homogeneous isotropic medium with an initial stress field are derived based on the linear elastic, finite deformation
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Computational modelling of microwave-induced fractures in igneous rocks using phase field method Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-23 Zicheng Wang, Chunshun Zhang
This study introduced a simplified thermodynamic model based on the regularized phase field method for simulating the thermally induced fractures of rocks pretreated by microwave. A thermo-mechanical model comprises three main parts developed to evaluate the fractures: the heat generation of the rock specimen is determined via the heat balance equation; the calculation of thermally induced stress is
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Experimental investigation on the influence of NaCl concentration on triaxial mechanical behaviors of a low-clay shale Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-23 Sheng-Qi Yang, Wang-Xing Hong, Jian-Guo Wang, P.G. Ranjith, Xiao-Lin Wang
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Brittle rock mass failure in deep tunnels: The role of infilled structural plane with varying dip angles Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-22 Yuzong Li, Liang Yuan, Qinghe Zhang
Filled rock discontinuities are commonly encountered in underground engineering excavations, and their mechanical behavior has a significant impact on the stability of surrounding rocks. However, their performance under three-dimensional stress conditions has rarely been explored in the past. In this study, we summarized the typical failure characteristics of filled structural planes in deep-buried
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Coupled thermodynamic and thermomechanical modelling for compressed air energy storage in underground mine tunnels Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-21 Xiuxiu Miao, Kai Zhang, Jianguo Wang, Yanan Gao, Leiming Wang, Qinghua Guo, Qingliang Chen
Compressed air energy storage (CAES) in underground mine tunnels using the technique of lined rock cavern (LRC) provides a promising solution to large-scale energy storage. A coupled thermodynamic and thermomechanical modelling for CAES in mine tunnels was implemented. Thermodynamic analysis of air during CAES operation was carried out. Difference in temperature and pressure evolution when considering
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Mechanical properties of carbonate fault rocks Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-19 Vasileios Kallimogiannis, Charalampos Saroglou
The purpose of the present study is to investigate the mechanical properties, mainly wave velocity, strength, deformability and degradation characteristics of carbonate fault rocks in the laboratory. The investigated materials present a complex behavior, mainly controlled by their tectonic disturbance, which has not been thoroughly studied due to practical limitations in sampling preparation and execution
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3-D visual analysis and quantitative characterization on coal matrix based on Micro-CT Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-15 Changxin Zhao, Yuanping Cheng, Chenghao Wang, Kaizhong Zhang, Zhenyang Wang, Peng Chu, Tao Yang
Coal matrix, the storage space for adsorbed gas, is highly related to gas recovery and gas outburst disasters. However, existing research predominantly relies on theoretical assumptions, lacking experimental validation. In this study, we employ X-ray computed tomography (CT) to obtain high-resolution (13.45–15.157 μm) internal structure images of various coal samples. The three-dimensional model of
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Failure mechanism of hot dry rock under the coupling effect of thermal cycling and direct shear loading path Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-13 Bowen Liu, Heping Xie, Jianjun Hu, Jie Liu, Biao Li, Cunbao Li
Inducing shear failure in reservoir rocks is a critical strategy for enhancing hot dry rock resource exploitation, as it promotes the development of an extensive fracture network. In this study, granite was subjected to direct shear tests under three distinct temperatures and five thermal cycling treatments. Utilizing acoustic emission (AE) and digital image correlation (DIC) techniques, the shear
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Full-field solution from an oblique shock to estimate ground motion from blasting Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-12 S. Gómez, J.A. Sanchidrián, P. Segarra
The full-field solution (FFS) of the seismic radiation from a blasthole is refined with the use of a source function consistent with the shock physics on the detonation shock/rock interface. This source function accounts for the directionality of the flow in the detonation front, that is curved under the influence of the confining rock, inducing on it an oblique shock mostly on axial direction, contrary
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The critical pressures for crack closure, crack reopening and crack instability in hydraulic fracturing Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-12 J, o, a, c, h, i, m, , H, e, i, e, r, l, i
Micro-hydraulic and packer-sleeve fracturing experiments are widely used in geological exploration. In these, a crack is initially formed, then expanded through the rock formation under study. A chief application of these techniques is the estimation of principal stresses in deep geological formations based on two observations: the critical pressure when the crack 'closes' after fluid injection is
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Two-phase flow visualization experiments in variable-aperture fractures: The correlation between flow structure, displacement efficiency and relative permeability Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-11 Xin Zhou, Jianlong Sheng, Zuyang Ye, Xiaoliang Yang
The correlation of flow structure, displacement efficiency and relative permeability for two-phase flow in variable-aperture fractures is critical for many fractured rock applications. A systematic visualization method for two-phase flow experiments was developed and four transparent variable-aperture fracture samples were duplicated by epoxy casting method. A total of 112 times two-phase flow experiments
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Size effects on strength and deformability of artificially jointed hard rock Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-09 Manuel A. González-Fernández, Xian Estévez-Ventosa, Ignacio Pérez-Rey, Leandro R. Alejano, Hossein Masoumi
An extensive experimental study is presented including around 140 triaxial compressive strength tests on artificially jointed hard rock. The experiments were performed on cylindrical and jointed specimens with either 1 sub-vertical and 2 sub-horizontal (1 + 2) or 2 sub-vertical and 3-sub-horizontal (2 + 3) joint sets. The specimen diameter consisted of 38, 54 and 84 mm and the rock was Blanco Mera
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Experimental study on the effect of heating and liquid nitrogen-cooling cyclic treatment on mechanical properties and fracturing characteristics of granite Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-08 Yi Xue, Linchao Wang, Jia Liu, P.G. Ranjith, Feng Gao, Chengzheng Cai, Heping Xie
As an environmentally friendly anhydrous fracturing technology, liquid nitrogen (LN)-assisted refracturing can effectively improve fracture complexity and build Enhanced geothermal systems by repeatedly cooling the hot dry rock. In this study, multiple heating and LN-cooling cyclic tests were conducted on granite samples to evaluate the impact of LN cooling on the mechanical properties of granite.
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Numerical modeling of hydraulic stimulation of fractured crystalline rock at the bedretto underground laboratory for geosciences and geoenergies Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-08 Iman Vaezi, Andrés Alcolea, Peter Meier, Francesco Parisio, Jesus Carrera, Víctor Vilarrasa
Hydraulic stimulation of Enhanced Geothermal Systems (EGS) aims at boosting permeability to facilitate fluid circulation, while keeping a low induced seismicity. However, some stimulations have led to poor permeability enhancement or too high induced earthquakes, which suggests that further understanding is needed on poromechanical processes during stimulation. Here, we model a highly-monitored test
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A new analytical model for stress distribution in the rock bolt under axial loading Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-07 D, a, n, q, i, , L, i
This study presents a novel analytical model to simulate the axial strain and stress distribution along the full embedment length of the grouted rock bolt under axial loading. The model is derived based on the force equilibrium equation at one infinitesimal section of the rock bolt to grout interface and solved using second order partial differential equation method. Such a model is advanced in a way
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Experimental investigation into influence of surrounding rock on strainburst: Insight from failure process and energy partition Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-04 Binwen Ma, Heping Xie, Changtai Zhou, Hongwei Zhou, Feng Gao, Peiwang Cao, Jianbo Zhu
The strainburst is the most common type of rockbursts, which may cause injury and death to workers, ruin to underground engineering facilities and destruction to mining/civil infrastructures. However, it is still unknown how the energy released from the surrounding rock affects the strainburst. To explore the effect of the surrounding rock on the strainburst, uniaxial compression tests were carried
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Reverse toe sliding criteria of laterally confined low wall slope subjected to counterweight fill Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-02 Thirapong Pipatpongsa, Kun Fang, Cheowchan Leelasukseree, Apipat Chaiwan, Natthawat Chanwiset
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Self-sealing of pre-cracked callovo-oxfordian claystone: Implications for geological disposal of nuclear waste Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-01 C. Wang, M. Briffaut, J. Talandier, F. Skoczylas
Self-sealing is a well-known property of mudrocks (clays, claystones and shales). In the context of geological disposal of nuclear waste, understanding the self-sealing mechanism and its efficiency is crucial for the repository safety assessment. This paper presents an experimental study on the pre-cracked Callovo-Oxfordian (COx) claystone to assess the effects of clay swelling and re-compaction on
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A true triaxial compression-induced microcracking model for evaluating short-term progressive and long-term creep failures of brittle rock Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-01 Xiaozhao Li, Lianjie Li, Chengzhi Qi
Deep underground surrounding rock is often in the true triaxial stress state. Therefore, it is of great practical importance to recognize the short-term stress-strain relationship of progressive failure and the long-term characteristics of creep failure for the design, construction and maintenance of underground engineering in the true triaxial stress state. This paper aims to propose a feasible theoretical
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Influences of water saturation and strain rate on the mechanical and failure behavior of sandstone under direct shear test with constant normal pressure Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-03-01 Tao Zhou, Xuehan Yin, Changtai Zhou, Pengfei Guo, Jian Zhou
Understanding the mechanical and failure behavior of rock subjected to dynamic shear load is essential for the scientific design and safe operation of rock engineering. To understand the coupled effect of water and strain rate on the mechanical and failure behavior of sandstone, direct shear tests with constant normal pressure were conducted on sandstone specimens under different water saturations
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Size effect model with competing mechanism for quasi-brittle materials under uniaxial compression Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-02-29 Xiaoyu Liu, Huimei Zhang, Shenghu Luo
Although researchers have proposed various size effect models, it is still one of the most challenging problems in mechanics and materials science to establish a model that can capture different types of size effect trends. In this work, the size effect models of the maximum flaw and fracture process zone (FPZ) are defined and verified. Then, these models are incorporated into the fracture mechanics
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Field experimental verifications of 3D DDA and its applications to kinematic evolutions of rockfalls Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-02-29 Guoyang Liu, Zhirui Zhong, Ke Ma, Wu Bo, Penghui Zhao, Yexin Li, Zhenping Zhang, Peng Zhang
As a frequent occurring geomorphological process characterized by high energy and mobility, the rockfall movement is the basis of the disaster prediction and mitigation. In this study, the kinematic evolution behaviors of rockfalls are investigated using three-dimensional discontinuous deformation analysis (3D DDA) based on block kinematics. A series of field experiments are designed by orthogonal
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Insights into the ground response characteristics of shallow tunnels with large cross-section using different pre-supports Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-02-29 Zhenyu Sun, Dingli Zhang, Daoping Liu, Qimin Tai, Yanjuan Hou
The construction of shallow tunnels with large cross-sections is associated with safety issues during excavation and the presence of surface structures above the tunnel, particularly when the tunnel is excavated in a soft ground. A pre-support is considered a crucial stabilization technique for tunnels, as it performs the dual functions of face failure prevention and displacement control; however,
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Integrated multiple tracer-based tomographic inversion and heterogeneity characterization of karst limestone mining regions in southwest China Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-02-29 Xintong Wang, Zhenhao Xu, Zhaofeng Li, Dongdong Pan, Haiyan Li
Understanding the distribution of hydraulic parameters is essential for preventing water-related hazards in limestone mines. Tracer testing is a technique to elucidate the spatial heterogeneity of hydraulic parameters and transport properties within an aquifer. In order to estimate fluid flow characteristics and the distribution of hydrogeologic properties of the limestone aquifer, this study performed
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Mechanical characterisation of the stones of Notre-Dame de Paris by in situ acoustic velocity measurement Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-02-28 Nathalie Domede, Thomas Parent, Colin Guenser, Ali Boukham, Pierre Morenon, Aboubacar Sadikou Issa-Ibrahim
The Notre-Dame de Paris cathedral was built in the 12th century with Lutetian limestone from several quarries in the Paris basin, and was renovated several times. The aim of the research presented here was to determine the mechanical parameters of these limestones and their variability over the entire structure. For this purpose, the authors performed non-destructive ultrasonic propagation velocity
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Impact of computer-controlled drill carriage's position deviation on automated hole positioning in underground roadways Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-02-26 Haojun Wu, Min Gong, Qing Zhao, Xiaodong Wu, Xiangyu Liu
When the drill and blast technique is used to excavate a roadway in underground coal mines, the relationship between the carriage and roadway space affects the automated hole positioning of a computer-controlled drill jumbo. This leads to low efficiency in hole positioning and high safety risks. This study analyzes the effects of deviations in carriage positioning, left-stacked stones, and inappropriate
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Effect of short- and long-term nonlinear behaviour on the thermoporomechanical pressurisation in COx claystone Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-02-26 M. Souley, M.-N. Vu, E.D. Coarita-Tintaya, G. Armand, F. Golfier
This study focuses on assessing the effect of short- and long-term nonlinear deformation (plasticity and creep) on the thermo-hydro-mechanical (THM) responses of Callovo-Oxfordian (COx) claystone, considered as the host formation for the geological radioactive waste disposal in France, if it is licensed. The temperature increase due to heat emitted from the waste package induces a pore pressure rise
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Crack system development in a heated rock with kerogen-filled pores Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-02-26 A.N. Galybin, S.E. Yakush
This paper deals with modelling of crack system formation in an initially impermeable rock with pores filled by solid kerogen upon its thermal treatment. Heating of the rock matrix results in the transformation of the kerogen particles into oil and gas, thus the pores become subject to internal pressure, which can initiate the development of cracks and formation of crack systems. Conditions at which
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A multiscale poroelastic damage model for fracturing in permeable rocks Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-02-24 Jianxiong Yang, Jianfeng Liu, Wenfeng Li, Jingjing Dai, Fujun Xue, Xiaoying Zhuang
A new poroelastic damage model is developed in the paper to describe the macroscopic failure of rock materials due to microcrack nucleation and propagation based on a multiscale framework. The model is deduced from locally periodic microstructure with dynamically evolved microcracks in heterogeneous rock body. The homogenization method based on asymptotic expansions gives rise to the damage evolution
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On the role of poroelastic stressing and pore pressure diffusion in discrete fracture and fault system in triggering post-injection seismicity in enhanced geothermal systems Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-02-24 Iman R. Kivi, Victor Vilarrasa, Kwang-Il Kim, Hwajung Yoo, Ki-Bok Min
Injection-induced seismicity has become one of the most critical challenges for the widespread deployment of Enhanced Geothermal Systems (EGS). In particular, some EGS development projects have led to large, damaging earthquakes that unexpectedly occurred far off the stimulated reservoir region and, in particular, after stopping fluid injection. Yet, the causative mechanisms of these seismicity patterns
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In-situ deformation and fracturing characteristics of geomaterials under dynamic loading: Insights from ultra-high-speed X-ray phase contrast imaging and DEM modelling Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-02-23 H.C. Wang, K. Liu, B. Lukic, W.R. Hu, C.H. Braithwaite, J. Zhao, A. Rack, Q.B. Zhang
Dynamic loadings, such as earthquakes, blasts, and impacts, are commonly encountered in mining and underground infrastructures, and therefore predicting the failure of geomaterials, including cement, concrete and rock at high strain rates holds significant importance. The exploration of fracturing and deformation properties in materials under dynamic loadings is essential for comprehending the failure
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Prediction of strainburst risks based on the stiffness theory: Development and verification of a new rockburst indicator Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-02-23 Jun Wang, Derek B. Apel, Chong Wei, Huawei Xu
Strainburst is an unstable rock failure phenomenon that occurs at deep excavations' boundaries due to the excavation-induced stress concentration and a “soft” loading environment. A critical task for researchers is to predict the possibility or risk of strainburst occurrence. In this paper, the local mine stiffness (LMS) of a tunnel determined by a novel calculation method is compared to the post-peak
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Study of cutting forces acting on a disc cutter and impact of variable penetration measured by full scale linear cutting tests Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-02-22 Muthu Vinayak Thyagarajan, Jamal Rostami
Designing the cutterhead of mechanized rock excavation systems and prediction of machine performance for these units often requires reliable estimation of cutting forces. The magnitude and variability of cutting forces depend on the rock and cutter type, as well as geometrical parameters in cutting such as spacing between the cuts, and depth of penetration. In most application, various components of
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The discrete fracture process zone of shale on micrometer scale Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-02-22 Min Zhang, Guangqing Zhang, Lei Chen, Wei Sun
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Determination of the stress tensor of a triaxial strain cell in a three-layer model using the genetic algorithm and support vector machine Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-02-22 Minzong Zheng, Shaojun Li, Zejie Feng, Liu Liu, Wei Jia
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The influence of backfilling of a caved zone and magma intrusion-type faults on surface deformation in a metal mine caused by sublevel caving mining Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-02-22 Kai Ma, Yong Zhao, Tianhong Yang, Rongxing He, Junxu Hou, Yilong Liu, Honglei Liu, Qingshan Ma, Wei Zhang
Based on monitoring data and engineering geological conditions, the surface deformation patterns caused by sublevel caving mining in the Dahongshan iron mine were analyzed. By interpreting the four stages of development of the surface fractured zone, namely, the formation, full unilateral development, asymmetric expansion and backfilling of the caved zone, it was found that the magma intrusion-type
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Effective wave velocity in rock masses with double-scale discontinuities under in-situ stresses Int. J. Rock Mech. Min. Sci. (IF 7.2) Pub Date : 2024-02-19 M. Wang, J.L. Shang, L.F. Fan
The effective velocity of stress wave in rock masses with double-scale discontinuities subjected to in-situ stresses was investigated in the present study. An improved model that comprehensively considers the deformation of macrojoint and wave velocity of microdefected rock mass under in-situ stress was proposed to study the effective velocity of stress wave. The effect of in-situ stress on effective