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Roles of heat and stress transfer in triggering fault instability in conjugate faulted reservoirs Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-06-24 Yueqiang Ma, Kaiwen Xia, Qinghua Lei, Chongyuan Zhang, Derek Elsworth, Quan Gan, Liang Yuan
The presence of multiple conjugate but non-intersecting faults in geothermal reservoirs presents issues related to fault interaction in the presence of complex coupled thermo-hydro-mechanical (THM) processes in influencing the triggering of seismicity. We examine alternate strategies in stimulating such a conjugate-faulted geothermal reservoir analogous to that hosting the 5.5 Pohang earthquake (2017)
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Estimation of rock core indices for development of underground infrastructure using non-invasive geophysical methods Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-06-24 Muhammad Hasan, Yanjun Shang, Shengwen Qi, Qingsen Meng
Rock mass characterization offers the basis of the stability criterion for the planning and advancement of civil engineering projects. Rock core index (RCI) is one of the key geotechnical parameters adopted in rock mechanics and rock engineering. RCI provides risk assessment regarding the success criteria of engineering design. Consequently, an accurate estimate of such parameters is a challenging
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Thermal-mechanical modelling on cumulative freeze-thaw deformation of porous rock in elastoplastic state based on Drucker-Prager criterion considering dilatancy Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-06-24 Zhitao Lv, Mingchao Wu, Zhaohu Wang, Xiangtai Zeng
The comprehensive understanding of freeze-thaw (F-T) deterioration and deformation properties of rock is a critical basis for frost damage prevention on cold regional rock engineering. In freezing process, plastic strain generates in rock when the stress induced by pore ice pressure (PIP) becomes higher than yield strength, and unrecoverable deformation accumulates in rock under multiple F-T cycles
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LithoSegNet: Regional attention-based deep fusion of multi-scale and cross-stage features for real-time lithology segmentation Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-06-24 ZhenHao Xu, Heng Shi, Peng Lin, Shan Li
Lithology identification plays an important role in engineering construction, disaster prediction, reservoir evaluation, and other fields. However, with the development of mechanization and automation, traditional lithology recognition methods are gradually unable to meet existing demands in terms of recognition speed and efficiency. In order to achieve real-time, fast, and accurate identification
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Dynamic mechanical behaviours of frozen rock under sub-zero temperatures and dynamic loads Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-06-22 Kai Liu, Tingting Wang
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Experimental study on dynamic deformation and breaking mechanism of high-temperature hard rock cutting by abrasive water jet Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-06-20 Jianming Shangguan, Zhaolong Ge, Zhe Zhou, Xu Zhang, Lei Liu, Zhongtan Li
The development of deep geothermal resources encounters challenges related to high temperatures and hard reservoir rocks. Abrasive water jets (AWJ) offer a potential solution to enhance the efficiency of breaking high-temperature hard rocks in deep ground. This mainly originated from their combined characteristics of jet cooling impact and high-speed abrasive grinding. In order to investigate the dynamic
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Rock cutting using disc tool assisted by the vertical pre-slotting on free-face Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-06-16 Xiaodi Zhang, Hongxiang Jiang, Kuidong Gao, Congcong Gu, Hongsheng Li
Pre-slotting rock is an effective method for improving the rock cutting performance of mechanical cutting tools. A method of rock cutting using a disc tool assisted by vertical pre-slotting on free-face has been proposed, and in this paper, the effect of the number and configuration of pre-slots on the improvement of rock cutting performance is evaluated. The progress of crack propagation is analyzed
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Mode-I fracture toughness and damage mechanism of dry and saturated sandstone subject to cryogenic condition Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-06-13 Yuliang Zhang, Guowei Ma, Xudong Li
The storage of liquefied natural gas (LNG) in underground coal mine tunnels offers numerous advantages, with the fracturing characteristics of surrounding rock under cryogenic conditions (−162 °C at the lowest) closely tied to the safety of the storage. However, a substantial knowledge gap persists within the entire temperature range, presenting a significant challenge in our understanding. The innovation
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Thermal fracturing of anthracite under low-energy microwave irradiation: An experimental study Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-06-07 Yirui Gao, Yixin Zhao, Sen Gao, Zhuang Sun, Xiaoliang Wang, Hao Wang
Microwave-assisted coalbed methane (CBM) development is a very promising technology for engineering applications. The mechanism of the macro and micro thermal fracture of coal must be further discussed because of the thermal inhomogeneity of microwave caused by the heterogeneity and structural complexity of coal. In this study, the temperature, weight and P-wave velocity of anthracite were tested under
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Intelligent detection of dynamic cracking along an interface of brittle material using high-speed photography assisted by data augmentation and machine learning Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-06-03 Jiahao Tie, Wei Wu
Dynamic cracking along an interface of brittle material is a fundamental knowledge of rock faulting but remain largely enigmatic. Laboratory investigation of the extremely fast process requires the use of advanced high-speed photography, which limits wide participation in this research. This study applies image data augmentation and Convolutional Neural Network (CNN) to assist high-speed photography
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A new stage control device for open TBM tunnel lining support in water-rich weakly cemented soft rock Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-06-03 Xin Kang, Xiongyao Xie, Jia Zou, Shengxiang Lei, Biao Zhou, Qijun Dong
Based on the convergence confinement method, yielding support has become an important means to control large deformations of soft rock. However, it is not sufficient to adopt a single yield for different failure processes of the surrounding rock. This study investigated the zonal deformation and failure mechanism of surrounding rock during open tunnel boring machine (TBM) excavation of inclined shafts
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A phase transition model for acid dissolution along a rough-walled carbonate fracture Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-31 Yun Chen, Haiyang Mao, Guowei Ma
Carbonate reservoirs commonly feature rough-walled fractures with complex geometries and hydraulic properties, posing significant challenges in accurately evaluating the dissolution patterns and conductivities along these fractures during acid stimulation processes in oil, gas, and geothermal production. This study conducts an experimental investigation of acid treatment in carbonate fractures with
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A study on influential rock properties for predicting the longitudinal wave velocity in a rock bolt: Numerical and machine learning approaches Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-30 Jung-Doung Yu, Hyung-Koo Yoon
The longitudinal wave velocity () in a rock bolt is a useful parameter for evaluating the conditions of the rock bolt and the surrounding rock mass. This study investigated the influence of rock properties on the prediction of in a rock bolt using numerical and machine learning approaches. Through numerical simulations, we obtained a dataset of the variations in according to rock properties, compressional
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A micromechanical analysis of marble pulverization under quasi-static progressive cyclic loading Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-29 Bin Fu, Yingchun Li, Chun'an Tang, Yinlin Ji, Arno Zang
Highly fragmented rocks (i.e., pulverized rocks) in the fault damage zone presumably develop during co-seismic deformation processes. These pulverized rocks close to the fault core are generally thought to originate from high strain rates, whereas the genesis of pulverized rocks that can be found several hundred meters away from the fault core – where quasi-static conditions prevail – remains unclear
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Influence of coupling and properties of encapsulating mortars on the anchoring capacity of rock bolts Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-29 Emiliano M. Giraldo Paredez, Arístides Sotomayor, Teófilo Allende, Mariano Pacheco
Rock bolts are the most widely used support elements in rock excavations. Some bolts anchor themselves and others require encapsulants to attach to the wall of the holes. The coupling of the rock bolts in the walls of the drill holes and the properties of the mortars with which the rigid bars are installed are aspects that have been little studied; basically, due to the difficulty of obtaining specimens
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A novel micro-mechanical anisotropic elastic–plastic damage model for understanding time-dependent behaviors on rock-like materials Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-28 Qiaojuan Yu, Shigui Du, Qi-Zhi Zhu, Jian-Fu Shao, Rui Yong
Rock-like materials demonstrate significant induced anisotropy due to intricate micro-structural evolution under external loading, where their effective mechanical behaviors over short and long durations are heavily contingent upon the growth and subcritical expansion of microcracks. In this study, we introduce a novel unified constitutive model aimed at describing the anisotropic damage and time-dependent
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A fast permeability measurement method based on congenetic bilateral pulse decay Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-28 Mingbao Zhang, Yue Wang, Zhiguo Tian, Moran Wang
The pulse-decay method is a transient approach widely employed for permeability measurements, holding significant relevance for modeling and utilizing flow in low permeable porous media. Most of the existing pulse-decay methods predominantly rely on pressurization or depressurization in one chamber, requiring gas penetration through the entire sample and complete attenuation, which may take a long
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Mechanical behavior evolution and failure characteristics of saturated and dry rocks under different water pressure environments Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-28 Shun Ding, Shibin Tang
A complex and changeable water environment is a key factor for safe rock engineering. Variations in water distribution and pressure pose serious challenges in evaluating rock properties and failure modes. To investigate the effect of real water‒rock interactions on rock mechanical behavior, the self-developed hydraulic loading test equipment was designed. A series of mechanical experiments (unjacketed)
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Automatic identification and interpretation of discontinuities of rock slope from a 3D point cloud based on UAV nap-of-the-object photogrammetry Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-28 Shuonan Wang, Wen Zhang, Xiaohan Zhao, Qi Sun, Wenchuan Dong
Research on rock slopes has attracted considerable attention in the fields of infrastructure construction and disaster prevention. The search for an efficient and reliable method for discontinuity collection is an important task for various studies of jointed rock slope. Capturing high-precision and complete rock exposure images based on unmanned aerial vehicle (UAV) multi-angle and nap-of-the-object
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Acoustic emission noise reduction: A case of a uniaxial compression test of gypsum-like rock Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-27 Chongyang Wang, Dongming Zhang, Ziyang Xiong, Beichen Yu, Xiaolei Wang, Fake Ren, Yu Chen
In acoustic emission tests, the effective signal generated by crack initiation and propagation inside a sample is easily affected by the testing machine, earth vibration and other external noise, which increases the difficulty of data processing and analysis. To solve this problem, a gypsum sample under uniaxial compression is taken as an example to analyze and process the acoustic emission signal
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Optimising stope design through economic and geotechnic assessments of predictions made at a meter scale resolution using the sites' reconciled data Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-27 Benoît McFadyen, Martin Grenon, Kyle Woodward, Yves Potvin
The final geometry of open stopes often diverges from the design, creating unintentional volumes of overbreak and underbreak. Tools, such as the Stability Chart, are used for predicting overbreak, but its limitations regarding the precision of the predictions and the exclusion of underbreak have constrained the benefits of a predictive tool at the design stage. Furthermore, the economic aspects are
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Geomechanical modeling to assess the injection-induced fracture slip-potential and subsurface stability of the Cambro-Ordovician reservoirs of Hassi Terfa field, Algeria Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-24 Soumya Benayad, Souvik Sen, Rafik Baouche, Sourav Mitra, Rabah Chaouchi
The in-situ stress state and the distribution of the critically stressed fractures have significant implications on optimum wellbore placement, production enhancement, fluid injection, and induced seismicity which largely influence the reservoir management strategies. This study presents a comprehensive geomechanical modeling to infer the likelihood of shear slippage of the optimally oriented weak
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Uncovering the progressive failure process of primary coal-rock mass specimens: Insights from energy evolution, acoustic emission crack patterns, and visual characterization Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-23 Xiang Yu, Jianping Zuo, Lingtao Mao, Xiaowei Xu, Bo Lei, Shankun Zhao
The failure and instability of deep coal-rock mass structures, which are influenced by mining disturbances, are major contributors to disasters like rock bursts. This study involved conducting indoor experiments using uniaxial loading test and acoustic emission (AE) experiments on indigenous primary coal-rock mass (PCRM). We utilize chaotic bifurcation based on strain energy to characterize the progressive
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Extension of reliability information of Z-numbers and fuzzy cognitive map: Development of causality-weighted rock engineering system to predict and risk assessment of blast-induced rock size distribution Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-22 Zhiyu Zhang, Shahab Hosseini, Masoud Monjezi, Mojtaba Yari
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Estimation of stress state using measured tunnel convergence in loop galleries excavated in mudstone Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-22 Kazuhei Aoyagi, Kentaro Sugawara, Katsumi Kamemura, Makito Nago
A method for estimating the stress state during the construction of underground facilities such as deep geological disposal repositories is necessary to enhance the reliability of their design, construction, and long-term performance. For this purpose, numerous in situ measurements of variables such as hydraulic fracturing or the stress relief method have been typically performed to estimate the stress
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Application of three-component acoustic emission sensor in rock mechanics experiments Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-20 Shan Wu, Ke Gao, Yunyi Qian, Hongkui Ge, Xiaoqiong Wang, Tiantai Li
In laboratory rock mechanics experiments, it is common practice to employ single-component acoustic emission (AE) sensors to monitor the rock fracturing process, where the fracture location and fracturing mechanism can be inverted from the single-component AE waveforms. However, since such applications are often based on simplified isotropic hypotheses, accurately capturing the influence of strong
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A practical constitutive model of saturated fractured porous rock mass considering the fully coupling between the pore and fracture domains Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-20 Ya-yuan Hu, Fei Ye
Many different practical constitutive models have been proposed for saturated fractured porous media, where the number of model parameters equals the number of constitutive state variables. However, none has considered the fully coupled deformation and hydromechanical behavior between pore and fracture domains. To address this issue, first, composite effective stresses are proposed as stress state
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Benchmark experiment on shear behavior of ice-filled planar rock joints using a novel direct shear testing apparatus Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-18 Bo Li, Xin Gong, Gang Wang, Jiaxing Qiao
Geo-hazards associated with rock slope failures in alpine regions have become increasingly prominent subject to the climate change. Shear behavior of ice-filled rock joints plays an important role in the stability of jointed rock slopes. To explore the shear behavior and failure mechanism of frozen rock joints, granite and sandstone specimens containing a planar joint were prepared. Direct shear tests
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Hydraulic conductivity tensor of cracked rock masses at depths reaching 1,000 m Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-17 Kenichiro Suzuki, Takato Takemura, Masanobu Oda, Hiroyuki Tada, Hiroya Matsui, Teijiro Saito, Yoshihiro Hatsuyama, Takuro Maeshibu, Shogo Kawakita
A cracked rock mass can be idealized using a three-set model of orthogonal cracks. By varying the number of cracks per set, the structural anisotropy caused by the cracks is represented, and by rotating the principal axes of the structural anisotropy a more realistic model is constructed following field observations. A constitutive law for closing a crack aperture is formulated based on the results
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Quantitative estimation of potential rockburst pit depths during blasting excavation in deep tunnels Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-17 Jinhao Dai, Fengqiang Gong, Zhichao He, Lei Xu
Accurate estimation of potential rockburst pit (PRP) depth contributes to assessing rockburst risks and developing prevention programs, while the existing empirical methods lack of reasonable consideration for the different damage distributions within surrounding rocks during blasting excavation. This study provides the PRP depth estimation formula matching two damage distributions, and subsequently
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A geometric variation method to extract rock strength parameters via uniaxial compression testing Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-14 Zhe Li, Zhen-Qi Yang, Meng Fu, Gao-Feng Zhao
Numerical modelling in rock engineering and mechanics often requires inputting multiple sets of strength parameters, such as the commonly encountered tensile strength, cohesion, and friction angle. Usually, obtaining these parameters requires performing different types of rock mechanics experiments on certain rock specimens, such as tension tests and triaxial tests, which are time-consuming and labor-intensive
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On quantification of equivalent permeability tensor in sparsely fractured rock masses Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-14 P. Pakdel, S. Pietruszczak
The work presented in this paper is focused on the assessment of hydraulic conductivity in sparsely fractured rocks. Different simplified methodologies are used, including Oda's notion of permeability tensor as well as pipe network models, and the results are compared with those generated by a more accurate approach, which incorporates a constitutive law with embedded discontinuity (CLED). Several
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Constraining the stress field and its variability at the BedrettoLab: Elaborated hydraulic fracture trace analysis Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-10 Kai Bröker, Xiaodong Ma, Shihuai Zhang, Nima Gholizadeh Doonechaly, Marian Hertrich, Gerd Klee, Andrew Greenwood, Eva Caspari, Domenico Giardini
The measurement of the stress field and its natural heterogeneity is a common challenge in the field of geophysics and underground engineering. This study presents findings from an extensive mini-frac campaign conducted at the Bedretto Underground Laboratory (BedrettoLab) in the Swiss Alps. Six dedicated stress measurement boreholes, spanning 500m along the Bedretto Tunnel, were utilized to prepare
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Cross-scale analysis on the mechanical behavior of the conglomerate of Yulin Grottoes in China Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-09 Huihui Zhang, Qinglin Guo, Yanwu Wang, Shibin Tang, Tianjiao Li, Qi Zhang, Chun'an Tang
Investigating the mechanical properties of the surrounding rock of the caves is crucial for the preservation of grotto heritage sites. To comprehend the mechanical characteristics of conglomerates in the Dunhuang region of China, various experiments were utilized, including Scanning Electron Microscope, X-ray Diffraction, CT scanning, nanoindentation, and mechanical tests. These methods enabled the
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Influence of pre-existing crack on rockburst characteristics in coal-rock combination: A laboratory investigation Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-08 Xiaoling Zhao, Zhiyi Liao, Xiufeng Zhang, Peiwang Cao, Rui Li, Jianbo Zhu
The existing cracks in the roof rock are critical to stability of the coal-rock combination structure during mining activities, which is vital for safe exploitation in coal mines. However, the physical mechanisms by which pre-existing crack in the roof rock induces rockburst in coal mines are still poorly understood. In this study, to investigate the rockburst characteristics in an underground mine
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Energy evolution and strain localization in fractured sandstone under freeze-thaw cycling and uniaxial loading-unloading Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-06 Hao Tan, Yongjun Song, Huimin Yang, Yongxin Che
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Evolutionary patterns of shear behavior and crack distribution during fault slip Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-04 Hongxu Shi, Jianpo Liu, Shuzeng Liu, Jiahui Chang, Fengtian Li
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Deterioration of dynamic fracture properties of granite under the coupled effects of hydrochemical solutions and freeze-thaw cycles Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-02 Caoyuan Niu, Xiaohan Li, Lei Zhou, Zheming Zhu, Feng Dai, Jianxing Chen
Fractured rock mass is a kind of complex rock mass widely existing in engineering projects, which is often subjected to erosion by different pH hydrochemical solutions such as surface water, acid rain, acidic and alkaline wastewater discharge, and deicing salts. When the rock project in a cold region suffers from the coupled effects of hydrochemical solutions and freeze-thaw (FT) cycles, the frost
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Dynamic shear behaviours of granite under coupled static and high-rate loadings Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-05-02 Kai Liu, Jian Zhao
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Experimental study on response and precursor of pressure stimulated currents of combined coal-rock under cycling stress Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-04-30 Zhonghui Li, Tiancheng Shan, Enyuan Wang, Yue Niu, Xiaoran Wang, Xin Zhang, Haishan Jia, Dong Chen, Shan Yin, Weichen Sun
The coal-rock combination body is prone to rock burst and surface subsidence under loading, and adopting effective monitoring methods are valuable. In this paper, cyclic loading and unloading (CLU) tests were conducted to investigate the response and precursor of pressure stimulated currents (PSCs) in coal-rock combination samples. The results indicate that the PSCs of the coal-rock combination samples
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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 7.0) 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 7.0) 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 7.0) 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 7.0) 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 7.0) 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 7.0) 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 7.0) 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 7.0) 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 7.0) 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 7.0) 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 7.0) 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 7.0) 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 7.0) 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 7.0) 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 7.0) 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 7.0) 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 7.0) 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 7.0) 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 7.0) 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 7.0) Pub Date : 2024-04-02 P.X. Ji, G. Viegas, Q.B. Zhang