International Journal of Rock Mechanics and Mining Sciences最新文献

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Evolution of fracture network, permeability and induced seismicity during fatigue hydraulic fracturing 疲劳水力压裂裂缝网络演化、渗透率及诱发地震活动性
IF 7.5 1区 工程技术
International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-10-06 DOI: 10.1016/j.ijrmms.2025.106297
Chang Xia , Huanyu Wu , Ki-Bok Min , Derek Elsworth , Qi Zhao
{"title":"Evolution of fracture network, permeability and induced seismicity during fatigue hydraulic fracturing","authors":"Chang Xia ,&nbsp;Huanyu Wu ,&nbsp;Ki-Bok Min ,&nbsp;Derek Elsworth ,&nbsp;Qi Zhao","doi":"10.1016/j.ijrmms.2025.106297","DOIUrl":"10.1016/j.ijrmms.2025.106297","url":null,"abstract":"<div><div>Cyclic hydraulic fracturing (CHF) shows potential in reducing induced seismicity compared to conventional hydraulic fracturing (HF). However, controlling mechanisms that potentially limit induced seismicity but still enhance permeability during CHF remain unclear. We develop a novel time- and stress-dependent damage representative of fatigue crack growth through a coupled hydromechanical model using the block-based discrete element method (DEM). This new framework addresses the challenges in modeling CHF by simultaneously considering discrete fracture network, hydromechanical coupling, fatigue and in-situ stresses. Matching pressurization cycles-to-failure data in laboratory experiments confirms the contribution of sub-critical crack growth in the reduced breakdown pressures in CHF. Modeling fluid injections into a fractured reservoir with contrasting far-field stress ratios of 1.17 and 1.40 shows that CHF mainshocks are smaller than those by conventional HF. While HF induces seismicity primarily through the creation of new fractures, CHF generates seismicity predominantly from multiple small shear reactivations – these dissipate energy progressively and thereby reduce mainshock magnitude. CHF enhances permeability by creating a more connected fracture network than HF. Far-field stress ratio influences permeability by directing fracture growth orientations, and larger stress ratio leads to a higher proportion of shear fractures. This study provides new quantitative insights into the mechanisms of CHF in reducing induced seismicity while increasing effectiveness in elevating permeability.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"195 ","pages":"Article 106297"},"PeriodicalIF":7.5,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145261946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Integrating numerical modeling and deep learning with electrical resistance tomography for rock mechanics 集成数值模拟和深度学习与电阻层析成像岩石力学
IF 7.5 1区 工程技术
International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-10-03 DOI: 10.1016/j.ijrmms.2025.106294
Gao-Feng Zhao , Yusheng Deng , Xin-Dong Wei , Ze Xu , Xifei Deng , Hongbo Li
{"title":"Integrating numerical modeling and deep learning with electrical resistance tomography for rock mechanics","authors":"Gao-Feng Zhao ,&nbsp;Yusheng Deng ,&nbsp;Xin-Dong Wei ,&nbsp;Ze Xu ,&nbsp;Xifei Deng ,&nbsp;Hongbo Li","doi":"10.1016/j.ijrmms.2025.106294","DOIUrl":"10.1016/j.ijrmms.2025.106294","url":null,"abstract":"<div><div>The integration of physical testing and numerical modeling is becoming increasingly important in rock mechanics. This study leverages deep learning techniques to combine numerical modeling with an electrical resistance tomography (ERT) device. A dataset of complex conductivity distributions is first generated using numerical modeling with multi-point spline curves. A normalized data preprocessing method is then employed to transform measured physical signals into simulated signals while preserving their intrinsic characteristics. This approach enables transfer learning, allowing the trained network derived from numerical modeling to be effectively applied to the physical device. Building on this foundation, a one-dimensional convolutional neural network (1D-CNN) model is developed, demonstrating significant advantages in terms of image reconstruction accuracy, computational efficiency, and robustness. The effectiveness of the 1D-CNN model is validated through its application in monitoring changes in electrical conductivity distributions during rock seepage, crack propagation, and failure processes in red sandstone specimens. This methodology offers a robust framework for integrating numerical modeling with physical experiments, providing a promising solution to address complex challenges in rock mechanics.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"195 ","pages":"Article 106294"},"PeriodicalIF":7.5,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Revealing the impacts of fracture morphology and grouting parameter on the slurry diffusion behavior in rough rock fracture with flowing water: Insights from numerical modeling 揭示裂隙形态和注浆参数对水流作用下粗岩裂隙中浆体扩散行为的影响:数值模拟的启示
IF 7.5 1区 工程技术
International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-10-02 DOI: 10.1016/j.ijrmms.2025.106293
Yang Liu , Zhijun Wu , Lei Weng , Peng Hou , Zhaofei Chu , Xiuliang Yin , Yuxin Liang , Quansheng Liu
{"title":"Revealing the impacts of fracture morphology and grouting parameter on the slurry diffusion behavior in rough rock fracture with flowing water: Insights from numerical modeling","authors":"Yang Liu ,&nbsp;Zhijun Wu ,&nbsp;Lei Weng ,&nbsp;Peng Hou ,&nbsp;Zhaofei Chu ,&nbsp;Xiuliang Yin ,&nbsp;Yuxin Liang ,&nbsp;Quansheng Liu","doi":"10.1016/j.ijrmms.2025.106293","DOIUrl":"10.1016/j.ijrmms.2025.106293","url":null,"abstract":"<div><div>Investigating the slurry diffusion behaviors in rough fracture with flowing water is essential for predicting the sealing efficiency and optimizing the grouting design. To study the slurry diffusion behaviors in rough fracture with flowing water, a slurry-water two-phase flow model in rough rock fractures with flowing water was proposed utilizing the CLSVOF method, the rhombus-square algorithm, and the Bingham rheological model. The numerical model was validated against theoretical solutions and experimental results. Subsequently, the influences of fracture roughness, fracture aperture, grouting hole diameter, water flow rate, and grouting pressure on slurry diffusion behavior were systematically studied. The results reveal that slurry diffusion undergoes distinct morphological transitions: initial circular diffusion, followed by an asymmetric elliptical shape, and ultimately U-shaped distribution. Water scouring is mainly observed at the upper region, sides, and outlet of the fracture. Fluid pressure decreases with increasing distance from grouting hole and increases over time during grouting. Greater fracture roughness reduces the scouring effect of flowing water and increases fluid pressure. Larger fracture apertures reduce sealing efficiency and promote slurry deposition. Increasing the grouting hole diameter significantly improve the slurry diffusion speed and sealing efficiency. In contrast, higher water flow rates accelerate slurry diffusion speed but intensify scouring along the fracture sides, thereby reducing sealing efficiency. Once the grouting pressure exceeds a certain threshold, its effect on final sealing efficiency becomes marginal. Higher water flow rate and grouting pressure leads to increased fluid pressure near the grouting hole. These findings provide valuable insights for predicting slurry diffusion behavior and optimizing dynamic water grouting strategies in fractured rock masses.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"195 ","pages":"Article 106293"},"PeriodicalIF":7.5,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hydro-mechanical-chemical effects on flow properties of Opalinus Clay in CO2LPIE project CO2LPIE工程中流体-机械-化学对蛋白石粘土流动特性的影响
IF 7.5 1区 工程技术
International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-09-27 DOI: 10.1016/j.ijrmms.2025.106295
Hyunbin Kim , Victor Vilarrasa , Roman Y. Makhnenko
{"title":"Hydro-mechanical-chemical effects on flow properties of Opalinus Clay in CO2LPIE project","authors":"Hyunbin Kim ,&nbsp;Victor Vilarrasa ,&nbsp;Roman Y. Makhnenko","doi":"10.1016/j.ijrmms.2025.106295","DOIUrl":"10.1016/j.ijrmms.2025.106295","url":null,"abstract":"<div><div>This study investigates the coupled hydro-mechanical-chemcial behavior and multiphase flow properties of Opalinus Clay – a potential caprock candidate for geologic carbon storage. A comprehensive series of laboratory tests is conducted to support the CO<sub>2</sub> Long-term Periodic Injection Experiment (CO<sub>2</sub>LPIE) project at the Mont Terri Underground Rock Laboratory, providing essential parameters for caprock characterization. Facies-dependent poroviscoelastic and transport properties are quantified: the sandy facies exhibit higher drained and unjacketed bulk moduli and permeability than the shaly facies, yet both facies display favorable long-term sealing potential with intrinsic permeability on the order of ∼10<sup>−20</sup> m<sup>2</sup> and breakthrough pressure of 2–4 MPa. Particular attention is given to the flow properties of the sandy facies under different testing scenarios including the experimental duration, pore pressure difference, fluid types, and saturation history. Long-term injection experiments highlight exponential permeability reduction driven by time-dependent compaction, which is effectively described by a poroviscoelastic model coupled with a power-law porosity-permeability relationship. In contrast, CO<sub>2</sub>-rich water injection yields relatively stable permeability with only minor irreversible changes likely controlled by fluid-rock interactions, fluid affinity, and electrokinetic effects. Two-phase flow tests further reveal that CO<sub>2</sub> displaces water more effectively in the sandy facies, while CO<sub>2</sub> relative permeability is insensitive to lithological differences. These findings demonstrate that heterogeneous Opalinus Clay retains strong sealing integrity under coupled hydro-mechanical-chemical conditions and provide critical laboratory insights that complement ongoing in-situ monitoring within CO<sub>2</sub>LPIE.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"195 ","pages":"Article 106295"},"PeriodicalIF":7.5,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamic analysis of soil-rock mixtures based on improved 3-D DDA-SPH method 基于改进三维DDA-SPH方法的土石混合体动力分析
IF 7.5 1区 工程技术
International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-09-26 DOI: 10.1016/j.ijrmms.2025.106286
Changze Li , Gonghui Wang , Guangqi Chen , Jingyao Gao , Pengcheng Yu , Xinyan Peng
{"title":"Dynamic analysis of soil-rock mixtures based on improved 3-D DDA-SPH method","authors":"Changze Li ,&nbsp;Gonghui Wang ,&nbsp;Guangqi Chen ,&nbsp;Jingyao Gao ,&nbsp;Pengcheng Yu ,&nbsp;Xinyan Peng","doi":"10.1016/j.ijrmms.2025.106286","DOIUrl":"10.1016/j.ijrmms.2025.106286","url":null,"abstract":"<div><div>Soil-rock mixtures (SRMs) are common in nature and are characterized by strong heterogeneity due to the coexistence of soil and irregular rock blocks. Understanding their complex deformation and failure mechanisms under dynamic conditions remains a major challenge. In this study, a powerful numerical approach is proposed based on the improved three-dimensional coupled Discontinuous Deformation Analysis and Smoothed Particle Hydrodynamics (3-D DDA-SPH) method for analyzing the behavior of SRM slopes in three-dimensional conditions. Key improvements include a face-based multi-shell contact detection algorithm for fast neighbor boundary searching, an advanced contact force model that distinguishes particle-to-face, particle-to-edge, and particle-to-vertex interactions between DDA blocks and SPH particles, and the implementation of a nonlinear softening constitutive model within the SPH module to better capture soil behavior under large deformation. The improved 3-D DDA-SPH method is well validated through theoretical and experimental tests and is applied to the investigation of the effect of block sphericity on the SRM slope failure mechanism and dynamic behavior. The results demonstrate that irregular blocks with low sphericity significantly restrict deformation, localize failure zones, and reduce sliding volumes, whereas spherical blocks have a limited resistance. Moreover, high-sphericity blocks within the SRM exhibit increased rotational motion during landslide events, contributing to a more dispersed deposition pattern compared to blocks with lower sphericity. These findings provide valuable insights into SRM slope behavior and offer practical implications for slope stability assessment and the design of landslide mitigation strategies. The proposed method offers a robust tool for analyzing mixture geomaterials in geotechnical engineering.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"195 ","pages":"Article 106286"},"PeriodicalIF":7.5,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determination of in-situ stress regime in the Koyna seismic zone, India from hydrofrac tests in a 3 km deep scientific borehole: implications for reservoir triggered seismicity 印度Koyna地震带3公里深科学钻孔水力压裂试验的地应力状态测定:对储层触发地震活动的影响
IF 7.5 1区 工程技术
International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-09-26 DOI: 10.1016/j.ijrmms.2025.106273
Vyasulu V. Akkiraju , Deepjyoti Goswami , Jochem Kueck , Gerd Klee , Brijesh K. Bansal , Sukanta Roy
{"title":"Determination of in-situ stress regime in the Koyna seismic zone, India from hydrofrac tests in a 3 km deep scientific borehole: implications for reservoir triggered seismicity","authors":"Vyasulu V. Akkiraju ,&nbsp;Deepjyoti Goswami ,&nbsp;Jochem Kueck ,&nbsp;Gerd Klee ,&nbsp;Brijesh K. Bansal ,&nbsp;Sukanta Roy","doi":"10.1016/j.ijrmms.2025.106273","DOIUrl":"10.1016/j.ijrmms.2025.106273","url":null,"abstract":"<div><div>Knowledge of in-situ stress field is crucial to assess the hazards associated with the impoundment of large water reservoirs. Scientific deep drilling to 3 km depth in the Koyna seismic zone, a classical site of recurrent reservoir triggered seismicity (RTS) over the past six decades, provided a rare opportunity to study the in-situ stress regime and its implications for RTS. Hydraulic fracturing (HF) tests were conducted at 9 levels in the crystalline basement between 1600 m and 2400 m. Breakdown pressures, re-frac pressures and shut-in pressures extracted from the pressure-time curves constrain the stress magnitudes S<sub>hmin</sub> and S<sub>Hmax</sub> while the orientations of the induced fractures are determined from post-frac acoustic images. The results are as follows. (1) Stress-depth profiles for the depth range 1607–2374 m are given by: S<sub>hmin</sub> [MPa] = (22.4 ± 1.7) + (0.019 ± 0.003) × (TVD [m] - 1607); S<sub>Hmax</sub> [MPa] = (44.3 ± 2.8) + (0.036 ± 0.006) × (TVD [m] - 1607), TVD being true vertical depth. (2) The mean orientation of S<sub>Hmax</sub> is N2°E±19°, consistent with stress-induced wellbore failures and earthquake focal mechanisms. (3) The stress magnitudes confirm strike-slip to normal transitional faulting environment and a critically stressed crust. (4) Low shear stress along the Donichawadi fault and lack of evidence for supra-hydrostatic pressure imply that fault slip could be induced by weak minerals such as phyllosilicate-rich fault gouge. (5) Bulk permeability of the order of 10<sup>−14</sup> to 10<sup>−16</sup> m<sup>2</sup> is required to induce slip at the hypocentral depths during monsoon and post monsoon seasons.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"195 ","pages":"Article 106273"},"PeriodicalIF":7.5,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pore-fracture evolution and seepage behavior in sandstone under triaxial stress: Insights from real-time CT imaging 三轴应力下砂岩孔隙-破裂演化与渗流行为:实时CT成像的启示
IF 7.5 1区 工程技术
International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-09-25 DOI: 10.1016/j.ijrmms.2025.106292
Chao Qiu , Yugui Yang , Yong Chen , Bingxiang Huang , Runpeng Shang , Chengzheng Cai , Wang Liu
{"title":"Pore-fracture evolution and seepage behavior in sandstone under triaxial stress: Insights from real-time CT imaging","authors":"Chao Qiu ,&nbsp;Yugui Yang ,&nbsp;Yong Chen ,&nbsp;Bingxiang Huang ,&nbsp;Runpeng Shang ,&nbsp;Chengzheng Cai ,&nbsp;Wang Liu","doi":"10.1016/j.ijrmms.2025.106292","DOIUrl":"10.1016/j.ijrmms.2025.106292","url":null,"abstract":"<div><div>Understanding the mechanisms of pore-fracture evolution and their effects on permeability is critical for predicting seepage behavior in fractured porous media. However, the real-time capture of these dynamic processes under realistic stress conditions remains technically challenging and has not been thoroughly explored. This study presents a methodology that integrates real-time CT scanning with 3D digital reconstruction and numerical simulation techniques, enabling the dynamic monitoring of structural evolution and fluid flow characteristics. Quantitative and morphological analyses were conducted on reconstructed models at different loading stages, and seepage simulations based on reconstructed pore-fracture structures were carried out to investigate fluid migration. Furthermore, a semi-logarithmic model linking permeability to fractal dimension was proposed and validated, providing a predictive tool based on microstructural characteristics. The analysis shows that shear-induced dilation causes isolated small pores to expand and form larger pores that eventually integrate into the connected network before cracking. After cracking, newly formed fractures promote the incorporation of isolated pores, whereas subsequent fracture closure leads to a reduction in the connected pore volume and an increase in the isolated voids. The fracture network forms a funnel-shaped pattern, extending from the specimen ends toward the center. Numerical simulations show that the evolution of the pore-fracture network significantly alters the seepage pathways and flow efficiency. Permeability exhibits a strong positive correlation with coordination number and throat size. These findings provide a new perspective on characterizing and predicting seepage behavior under realistic stress conditions, offering significant scientific and engineering implications for underground fluid control and hazard mitigation.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"195 ","pages":"Article 106292"},"PeriodicalIF":7.5,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of an integrated hydro-mechanical coupling test system for meter-scale fractured rock masses in laboratory 米级裂隙岩体室内一体化水-力耦合试验系统的研制
IF 7.5 1区 工程技术
International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-09-25 DOI: 10.1016/j.ijrmms.2025.106285
Aiqing Wu , Lei Fan , Jiming Gao , Yuankun Liu , Guoqing Guo , Xiaoyu Han , Wei Hu , Meiwang Yu
{"title":"Development of an integrated hydro-mechanical coupling test system for meter-scale fractured rock masses in laboratory","authors":"Aiqing Wu ,&nbsp;Lei Fan ,&nbsp;Jiming Gao ,&nbsp;Yuankun Liu ,&nbsp;Guoqing Guo ,&nbsp;Xiaoyu Han ,&nbsp;Wei Hu ,&nbsp;Meiwang Yu","doi":"10.1016/j.ijrmms.2025.106285","DOIUrl":"10.1016/j.ijrmms.2025.106285","url":null,"abstract":"<div><div>To address the issues of bank slope deformation, landslides, and associated geological disasters caused by the impoundment of high dam reservoirs, the author, based on the proposed idea of constructing an external high-pressure hydraulic test chamber, has developed for the first time the CJ3000 rock mass hydraulic coupling test system (CJ3000 RTS). This system enables hydraulic coupling tests on meter-scale rock mass specimens to be conducted under controlled laboratory conditions. This paper systematically presents the design and development of the above system, which includes the equipment functions and the main technical specifications, seven major innovations, the performance testing results, the experimental operation and control procedures, etc. The total weight of this test system is 200 tons, and it is built on a soft soil foundation. The test system can provide a maximum vertical reaction load of 30,000 kN and a maximum horizontal reaction loads of 20,000 kN in two directions. The water pressure in the sealed cabin and the seepage pressure of the rock mass specimen are independently controlled, with a designed water pressure of 3 MPa. A new type of high-precision magnetostrictive displacement sensor resistant to high water pressure has been developed, and an experimental operation procedure for conducting multiple spatial target positions with large-scale equipment have been proposed. Finally, a mechanical test under triaxial hydro-mechanical coupling conditions was carried out on a basalt specimen with a size of 50 cm × 50 cm × 100 cm, and preliminary application results were obtained. The study demonstrates that the test method proposed is feasible, and that the developed CJ3000 rock mass hydraulic coupling test system is effective. This work is of significant importance for advancing research on the mechanical properties of rock mass under complex structural and stress conditions, particularly regarding their hydraulic coupling characteristics.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"195 ","pages":"Article 106285"},"PeriodicalIF":7.5,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Anisotropic damage model for strength prediction and constitutive behavior of layered quasi-brittle rocks 层状准脆性岩石强度预测及本构行为的各向异性损伤模型
IF 7.5 1区 工程技术
International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-09-24 DOI: 10.1016/j.ijrmms.2025.106280
Qiaojuan Yu , Shigui Du , Jin Zhang , Jianfu Shao , Qizhi Zhu , Yuanjun Lv
{"title":"Anisotropic damage model for strength prediction and constitutive behavior of layered quasi-brittle rocks","authors":"Qiaojuan Yu ,&nbsp;Shigui Du ,&nbsp;Jin Zhang ,&nbsp;Jianfu Shao ,&nbsp;Qizhi Zhu ,&nbsp;Yuanjun Lv","doi":"10.1016/j.ijrmms.2025.106280","DOIUrl":"10.1016/j.ijrmms.2025.106280","url":null,"abstract":"<div><div>Weakness planes in cohesive quasi-brittle rocks have a significant impact on their mechanical behavior, with the inclination angle of these planes leading to pronounced anisotropy. To address this, we present an orientation-dependent damage model that quantitatively incorporates the effects of varying inclination angles within the solid matrix. The model is developed within the frameworks of irreversible thermodynamics and Mori–Tanaka homogenization theory. Analytical solutions and their applicability ranges are derived, and macroscopic strength criteria are established to describe anisotropic failure under different triaxial compression conditions. Model predictions are validated against experimental results for Longmaxi Formation shale and layered sandstone. This work enhances our understanding of the anisotropic constitutive behavior of layered quasi-brittle rocks and provides a solid theoretical foundation for predicting their strength and deformation.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"195 ","pages":"Article 106280"},"PeriodicalIF":7.5,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Monitoring fluid flows without seismicity associated with continuous water injection into geothermal reservoirs 监测与地热储层连续注水相关的无地震活动的流体流动
IF 7.5 1区 工程技术
International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-09-23 DOI: 10.1016/j.ijrmms.2025.106290
Kyosuke Okamoto , Naoki Aoyagi , Yusuke Mukuhira , Hiroshi Asanuma
{"title":"Monitoring fluid flows without seismicity associated with continuous water injection into geothermal reservoirs","authors":"Kyosuke Okamoto ,&nbsp;Naoki Aoyagi ,&nbsp;Yusuke Mukuhira ,&nbsp;Hiroshi Asanuma","doi":"10.1016/j.ijrmms.2025.106290","DOIUrl":"10.1016/j.ijrmms.2025.106290","url":null,"abstract":"<div><div>Accurate monitoring of subsurface fluid behavior, particularly temporal variations in fluid migration, is critical for resource development activities, including geothermal energy, shale oil and gas, and carbon dioxide capture and storage (CCS). In Enhanced Geothermal Systems (EGS), comprehending fluid behavior is essential for optimizing injection strategies, improving production efficiency, and ensuring safety during fluid injection operations. This study employs time-lapse seismic travel-time and attenuation tomography, along with hypocenter migration monitoring, to delineate fluid pathways, including aseismic zones. We conducted a case study at the Okuaizu geothermal field, Japan, where artificial recharge tests were conducted from 2015 to 2024 using a dedicated local microseismic monitoring network. By estimating both seismic wave velocity and attenuation structures, we identified macroscopic fluid behavior not associated with seismicity, as well as detailed fluid pathways inferred from hypocenter distributions. The recharged water induced seismicity near the recharge well, and also migrated to broader areas without significant seismic activity. An integrated understanding of fluid flows, both with and without seismicity, could contribute to improvement in resource developments and storage strategies by providing deeper insights into subsurface fluid dynamics.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"195 ","pages":"Article 106290"},"PeriodicalIF":7.5,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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