International Journal of Rock Mechanics and Mining Sciences最新文献

{"title":"Fully coupled hydro-mechanical–chemical continuum modeling of fluid percolation through rock salt","authors":"Ishmael Dominic Yevugah ,&nbsp;Xiang-Zhao Kong ,&nbsp;Antoine B. Jacquey ,&nbsp;Christopher P. Green ,&nbsp;Hartmut M. Holländer ,&nbsp;Pooneh Maghoul","doi":"10.1016/j.ijrmms.2024.105985","DOIUrl":"10.1016/j.ijrmms.2024.105985","url":null,"abstract":"<div><div>In domal and bedded rock salt geothermal reservoirs, geochemical dissolution of the in-situ rock salt formation can alter fluid transport properties, thus impacting fluid flow. Coupled Hydro-mechanical–chemical (HMC) modeling is a useful tool to evaluate fluid transport through rock salt geothermal systems and to assess their economic potential. Existing continuum-based numerical simulation of fluid transport through rock salt relies on the polyhedral orientation of rock salt crystal boundaries as potential fluid pathways, employing a deformation-dependent permeability model to depict pressure-driven fluid flow through rock salt. However, this numerical approach is exclusively HM-coupled and overlooks the influence of halite dissolution/precipitation on the permeability model. This study extends the deformation-dependent permeability model to account for halite dissolution by adopting a reverse mineral growth approach. Using this extended (HMC-coupled) model, we capture the relevance of geochemical reactions on the response of rock salt formations undergoing pressure-driven fluid percolation. The resulting simulations predict a lower fluid pressure than the HM-coupled scenario, highlighting the impact of halite dissolution on fluid flow through rock salt.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"186 ","pages":"Article 105985"},"PeriodicalIF":7.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Feature extraction and classification for induced microseismic signals during hydraulic fracturing: Implication for coalbed methane reservoir stimulation","authors":"Quangui Li ,&nbsp;Wenxi Li ,&nbsp;Qianting Hu ,&nbsp;Yunpei Liang ,&nbsp;Yanan Qian ,&nbsp;Zhizhong Jiang ,&nbsp;Zhen Wang ,&nbsp;Huiming Yang ,&nbsp;Wanjie Sun","doi":"10.1016/j.ijrmms.2024.106010","DOIUrl":"10.1016/j.ijrmms.2024.106010","url":null,"abstract":"<div><div>Before effectively analyzing the stimulation of coalbed methane (CBM) reservoirs using microseismic (MS) monitoring, it is necessary to accurately distinguish signals caused by hydraulic fracturing (HF) from interference signals. In this study, the Mel-frequency cepstral coefficient-fuzzy decision tree (MFCC-FDT) signal classification method was used. To minimize the loss of crucial details during preprocessing, feature extraction is accomplished by computing the MFCC values. This is followed by a decrease in the dimensionality and fuzzification of the dataset. Finally, the preprocessed data are entered into the FDT classifier that has been trained, thereby completing the automated identification of the induced signals. The proposed technique was applied to examine MS signals during the staged HF stimulation of a CBM reservoir. These findings suggest that the MFCC-FDT method outperforms the other combinations in terms of Accuracy, Precision, Recall, and F1-Score. Thirty-five interference MS events, including signals from tunneling blasts and machine operation during reservoir stimulation, were eliminated. The total stimulated reservoir volume under the MFCC-FDT technique validation was 22 966.29 m³, 1954.34 m³ less than the volume prior to the interference signals being removed. The proposed method reveals the nonlinear frequency characteristics of the induced MS signals and can be utilized to render more accurate MS signals for quantifying CBM reservoir stimulation by subsequent source inversion.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"186 ","pages":"Article 106010"},"PeriodicalIF":7.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929221","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}

{"title":"Single objective optimization for modeling elastoplastic damage of rock","authors":"Bozo Vazic,&nbsp;Eric C. Bryant,&nbsp;Kane C. Bennett","doi":"10.1016/j.ijrmms.2025.106034","DOIUrl":"10.1016/j.ijrmms.2025.106034","url":null,"abstract":"<div><div>A unified objective optimization framework is developed for damage-coupled multisurface plasticity in the context of normal-dissipative media. The framework is shown to be advantageous in rock and soil mechanics applications to overcome difficulty associated with non-smoothness of the elastic domain due to the use of multiple intersecting yield-surfaces. The basic approach is one of mathematical programming, where the evolution of internal variables over a finite time step incrementally minimizes a suitable convex functional of the internal-energy and dissipative terms. A variant of the Broyden–Fletcher–Goldfarb–Shanno algorithm (BFGS) is employed to obviate the need for matrix inversion while constricting order of operations to <span><math><mrow><mi>O</mi><mrow><mo>(</mo><msup><mrow><mi>n</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>)</mo></mrow></mrow></math></span>. To demonstrate the effectiveness of the novel multi-surface model in modeling strength and damage behavior over a range of confining pressures, we provide validation against existing triaxial compression data for Tavel limestone. Model robustness and utility in damage-based element deletion is further demonstrated in finite element simulation of a projectile penetrating into limestone.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"186 ","pages":"Article 106034"},"PeriodicalIF":7.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143103578","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}

{"title":"Hydro-mechanical insights for radioactive waste disposal from gas injection experiments in shale","authors":"Qazim Llabjani ,&nbsp;Alessio Ferrari ,&nbsp;Paul Marschall ,&nbsp;Lyesse Laloui","doi":"10.1016/j.ijrmms.2025.106039","DOIUrl":"10.1016/j.ijrmms.2025.106039","url":null,"abstract":"<div><div>Disposal of radioactive waste in deep geological repositories relies on the integrity of geological barriers, where gas migration can compromise long-term safety. This study examines the hydro-mechanical response of a shale under varying gas pressure build-up rates, using gas injection tests conducted in a high-pressure oedometer cell to simulate in-situ stress conditions. The research highlights that gas-induced porewater redistribution plays a key role during gas invasion processes. Results indicate that rapid gas pressure build-up leads to undrained conditions associated with significant porewater pressure development and expansive strains, while slower gas injection results in a drained response with less deformation. Additionally, a delayed gas breakthrough during rapid pressure build-up suggests the impedance of gas movement by porewater. However, once steady-state is achieved, both tests converge to similar gas flow rates and equilibrium states, indicating that the long-term gas transport properties of Opalinus Clay, selected as the host geomaterial for the Swiss repository, are not significantly influenced by initial gas pressure rates. Furthermore, neither the water intrinsic permeability nor the pore size distribution of the material is altered by gas invasion, highlighting the robustness of Opalinus Clay as a geological barrier for radioactive waste disposal. These findings emphasize the importance of understanding both short-term and long-term hydro-mechanical responses of shales subjected to gas transport to ensure the long-term containment and isolation of radioactive waste.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"186 ","pages":"Article 106039"},"PeriodicalIF":7.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143077710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"BIM for mining - Automated generation of information models using a parametric modelling concept","authors":"Jyrki Salmi ,&nbsp;Zehao Ye ,&nbsp;Jelena Ninic ,&nbsp;Rauno Heikkilä","doi":"10.1016/j.ijrmms.2025.106032","DOIUrl":"10.1016/j.ijrmms.2025.106032","url":null,"abstract":"<div><div>The adoption of Building Information Modelling (BIM) in construction has greatly improved project delivery, collaboration, and automation. However, its application in mining remains underdeveloped due to the unique challenges of mining projects, such as their vast scale, complexity, and heterogeneity. The present study aims to explore the characteristics and potential for adoption of BIM technology in the mining sector and focuses on the generation of a Mine Information Model (MIM) from raw mine data, addressing a critical gap in the current state of digital transformation in the mining industry. We designed a fully automated workflow employing parametric modelling to generate models of as-excavated underground tunnels and geological block models for mining, utilising analytical data from surrounding rock formations. Two case studies utilising real mine tunnel data from Finland were conducted to validate the proposed automated MIM generation workflow. The input raw data includes reality-captured raw data, such as point clouds or mesh models of tunnels, borehole information, and associated design files. Through the application of topology-based parametric objects and script-driven rules, MIMs can be effectively created for mining operations. This research offers significant potential for advancing the Mine Building Information Modelling (MineBIM) concept, supporting machine control, automation, and digital twin applications. As BIM adoption grows, innovative solutions are expected to improve efficiency, safety, and sustainability in mining. Our code for automating MineBIM modelling is available at: <span><span>https://github.com/zxy239/MineBIM</span><svg><path></path></svg></span>.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"186 ","pages":"Article 106032"},"PeriodicalIF":7.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142990426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strength changes associated with water transport in unsaturated tuff during drying","authors":"Yota Togashi ,&nbsp;Haruhiko Kotabe ,&nbsp;Masahiko Osada ,&nbsp;Shingo Asamoto ,&nbsp;Ken Hatakeyama","doi":"10.1016/j.ijrmms.2024.105984","DOIUrl":"10.1016/j.ijrmms.2024.105984","url":null,"abstract":"<div><div>The impact of water content on the strength of sedimentary rocks is a critical area of research, particularly in the contexts of disaster prevention and the construction of underground structures. Despite numerous factors being identified as contributors to the strength variations in sedimentary rocks caused by water content, a comprehensive understanding remains elusive. Moreover, only a limited number of cases have been discussed on strength changes in these rocks during water transport processes. In this study, one-dimensional water transport experiments were conducted during the drying process on Neogene tuff samples from Japan. The experiments focused on the unsaturated permeation of the porous media and analyzed the variations in advection and diffusion terms relative to saturation changes at multiple points. During the drying process, water transfer occurred primarily through diffusion, although advection was significant in the early stages to equilibrate the hydraulic head at the center of the specimen. Furthermore, the same tuff samples, with adjusted water content during the drying process, were tested using Brazilian and uniaxial compression methods to examine the variations in strength properties owing to the variations in water content. By comparing these results with the water transport data, we observed that significant alterations in strength occurred after the convergence of the advection term. It was shown for the first time that the decrease in strength of tuff occurs only during the water diffusion phase. These results are expected to be applied to more accurate evaluation of rock mass stability and advanced numerical analysis.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"186 ","pages":"Article 105984"},"PeriodicalIF":7.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142793450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A shear strength criterion of rock joints under dynamic normal load","authors":"Qiang Zhang ,&nbsp;Qiuxin Gu ,&nbsp;Shuchen Li ,&nbsp;Hongying Wang ,&nbsp;Guilei Han","doi":"10.1016/j.ijrmms.2024.106002","DOIUrl":"10.1016/j.ijrmms.2024.106002","url":null,"abstract":"<div><div>The shear strength of rock joints under dynamic normal load (DNL) conditions is quite different from that under constant normal loading (CNL) conditions. However, existing studies seldom involve the shear strength prediction of rock joints under DNL conditions. Therefore, a series of shear tests for rock joints under DNL conditions were carried out. The evolutions of the shear strength parameters, including both cohesion and internal friction angle, with dynamic loading amplitude and frequency were investigated according to the experimental results. A shear strength criterion for rock joints under DNL conditions was developed. The proposed model was verified by comparing the theoretically predicted values with experimental results, both of which showed excellent agreement. Additionally, the strength criterion is utilized to predict the peak shear strength under CNL and new DNL conditions. These prediction results were further validated by experimental methods, which extend the applicability of the proposed strength criterion. This study can provide valuable references for the stability evaluation of rock formation engineering and geological hazard warning under dynamic load disturbance.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"186 ","pages":"Article 106002"},"PeriodicalIF":7.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825391","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}

{"title":"Thermodynamic framework of non-local continuum damage–plasticity model","authors":"Yijun Chen ,&nbsp;Mostafa E. Mobasher ,&nbsp;Dongjian Zheng ,&nbsp;Haim Waisman","doi":"10.1016/j.ijrmms.2024.106007","DOIUrl":"10.1016/j.ijrmms.2024.106007","url":null,"abstract":"<div><div>We present a novel non-local continuum damage–plasticity model for predicting numerically the progressive failure behavior of cohesive-frictional materials within the framework of irreversible thermodynamics. The damage driving force is a function of the tensile part of elastic strain energy and a portion of the plastic stored energy, in which the introduction of coefficient <span><math><msub><mrow><mi>χ</mi></mrow><mrow><mi>p</mi></mrow></msub></math></span> provides the opportunity to quantify how the plastic deformation propels the damage growth. The non-local integral-type damage formulation is adopted to quantitatively describe the degradation of Young’s modulus and cohesive strength. The thermodynamically consistent model arrives at a damage–plasticity relationship that simultaneously provides an interplay description between regularized damage evolution and plastic deformation. A Newton–Raphson method is utilized to solve the nonlinear system of equations, in which an analytical non-local damage–plasticity consistent tangent operator is derived with an implicit return mapping algorithm. A detailed material parameter calibration procedure is performed based on standard laboratory tests considering uniaxial-, biaxial- and conventional triaxial-compressive experiments. Furthermore, simulations of proportional low-cyclic tension and compression loads, and triaxial compressive loads for hexahedron plain concrete specimens, a compacted clay specimen under tension loading, and a slope shear-failure problem are conducted to validate the applicability of the proposed model. Numerical simulations highlight the predictive ability of the model in describing the complex behaviors, including material hardening and softening, frictional shear fracture propagation, significant plastic deformation, brittle–ductile failure transition, confining pressure sensitivity, and material properties degradation. The proposed non-local model effectively addresses mesh sensitivity and non-physical spurious oscillations for all field variables.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"186 ","pages":"Article 106007"},"PeriodicalIF":7.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929222","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}

{"title":"Energy evolution and deformation features of re-loading creep failure in yellow sandstone after cyclic water intrusion","authors":"Yongde Liu ,&nbsp;Huijian Zhang ,&nbsp;Zhe Qin ,&nbsp;Xuxin Chen ,&nbsp;wenlong Liu","doi":"10.1016/j.ijrmms.2024.106019","DOIUrl":"10.1016/j.ijrmms.2024.106019","url":null,"abstract":"<div><div>To assess the long-term stability of rock bodies after excavation or slope excavation under external forces, uniaxial compression, and graded loading and unloading creep tests were performed on variable-saturation yellow sandstone after cyclic water intrusion. The energy evolution and deformation mechanisms of rocks during loading, creep, unloading, and holding were analyzed. Furthermore, the reloading creep behavior of variable-saturation rocks under cyclic water intrusion was investigated. Finally, a novel model is developed to describe this deformation using principles from damage mechanics and the viscoelastic-plastic theory. The following results were obtained: (1) Instantaneous deformation demonstrated a positive correlation with creep stress levels. The phenomenon of creep deformation exhibited nonlinear growth as the stress increased. (2) The nonlinear change rule of the plastic strain energy and dissipated energy of the rock under the action of a creep load could be characterized by a quadratic polynomial and power function, respectively, in accordance with an increase in the strain difference. (3) By analyzing the evolution of all levels of loading and unloading section energy and introducing an energy attenuation coefficient (<em>K</em>_<em>i</em>) based on the law of change in the graded loading and unloading creep test, an accurate destructive stress prediction was obtained. (4) A nonlinear creep damage constitutive model was constructed by combining the method of unsteady linear element and damage treatment. The accuracy of this model was assessed through model identification, validation, and evaluation of the prediction deviations from the test curves using experimental data. The findings of this study are of great significance for the prevention and control of creeping landslides initiated by water-related steep rocky slopes undergoing cyclic water intrusion.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"186 ","pages":"Article 106019"},"PeriodicalIF":7.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143049651","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}

{"title":"Effect of stress waves on fault slip using photoelastic analysis and numerical simulation","authors":"N.B. Zhang ,&nbsp;Z.X. Zhang ,&nbsp;R.L. Shan ,&nbsp;Q.X. Qi ,&nbsp;S.K. Zhao ,&nbsp;Y.S. Guo ,&nbsp;Y.Z. Li","doi":"10.1016/j.ijrmms.2025.106026","DOIUrl":"10.1016/j.ijrmms.2025.106026","url":null,"abstract":"<div><div>In coal mines, fault slips are often affected by stress waves originated from rock fracture during mining, but the effect of stress waves on a fault slip is still unclear. To understand such an effect, photoelasticity experiments and numerical simulation were carried out in this study, based on the thrust fault F16 in the Yima coal field, China. Three factors including stress wave sources, stress wave energy, and static friction coefficients of the fault were considered. The results show that: (1) Sources of stress waves located in the lower strata can more likely trigger the fault slip. (2) The curves of sliding displacement, strain ratio <span><math><mrow><msub><mi>r</mi><mi>ε</mi></msub></mrow></math></span> (shear strain to normal strain), and stress ratio <span><math><mrow><msub><mi>r</mi><mi>σ</mi></msub></mrow></math></span> (shear stress to normal stress) of the upper fault are similar to “U” shape with increasing stress wave energy. The rock failure in the upper fault could be the reason of the rising curves when the stress wave energy is high. (3) Normal and shear stresses have different responses to the perturbation of stress waves. (4) More friction energy but less sliding displacement is induced by stress waves if the static friction coefficient of the fault is large. (5) The Mohr's circle of the fault can reach the Coulomb failure threshold if the energy of stress waves is high enough, resulting in fault slip.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"186 ","pages":"Article 106026"},"PeriodicalIF":7.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143049845","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}