International Journal of Rock Mechanics and Mining Sciences最新文献_第7页

Failure and post-failure kinematic disaster processes of columnar rock masses based on 3D discontinuous deformation analysis 基于三维非连续变形分析的柱状岩体破坏及破坏后的运动灾害过程

IF 7 1区工程技术

International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-02-01 DOI: 10.1016/j.ijrmms.2024.106003

Ke Ma , Shengze Zhao , Guoyang Liu , Jianbin Miao , Jiashuo Kang , Linlin Wang , Qun Yu

{"title":"Failure and post-failure kinematic disaster processes of columnar rock masses based on 3D discontinuous deformation analysis","authors":"Ke Ma , Shengze Zhao , Guoyang Liu , Jianbin Miao , Jiashuo Kang , Linlin Wang , Qun Yu","doi":"10.1016/j.ijrmms.2024.106003","DOIUrl":"10.1016/j.ijrmms.2024.106003","url":null,"abstract":"<div><div>Columnar dangerous rock masses are considered important hazardous rock formations because of their ubiquity, abrupt failure, and high collapse frequency. The kinematic processes following their failure directly trigger geological disasters. This study investigates the failure and post-failure kinematic disaster processes of columnar rock masses using three-dimensional discontinuous deformation analysis (3D DDA). A comprehensive experimental system was established, and three sets of columnar laboratory models were employed to validate the 3D DDA simulations. Focusing on the Wangxia columnar rock mass, the failure and movement modes of single and multiple blocks were analyzed, considering the cutting of the structural planes within the rock column. Results demonstrated the high accuracy of 3D DDA in analyzing the kinematic disaster processes associated with the failure of columnar rock masses. With increasing number of cutting-surface combinations, the failure and movement modes of the blocks diversified and the durations of their oblique projectile motions after each collision with the slope decreased. Kinetic energy transfer between colliding blocks altered their initial trajectories and increased their movement durations compared with the observations for the single block. As the overall failure length of the columnar rock mass increased, the failure and movement modes of the blocks as well as the associated energy conversions changed, providing insights into the ensuing disaster mechanisms. Further, this study evaluated the impact of rock mass failure on highway traffic and predicted the disaster scope, providing a theoretical foundation for the development of disaster prevention strategies.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"186 ","pages":"Article 106003"},"PeriodicalIF":7.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142874849","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

Identification and thermal characteristics of linear discontinuities on a high-steep slope using UAV with thermal infrared imager 基于热红外成像仪的高陡边坡线性结构面识别与热特性研究

IF 7 1区工程技术

International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-02-01 DOI: 10.1016/j.ijrmms.2025.106025

Wen Zhang , Han Yin , Jianping Chen , Changwei Lu , Tengyue Li , Bo Han , Zihan Zhao , Jia Wang , Junqi Chen

{"title":"Identification and thermal characteristics of linear discontinuities on a high-steep slope using UAV with thermal infrared imager","authors":"Wen Zhang , Han Yin , Jianping Chen , Changwei Lu , Tengyue Li , Bo Han , Zihan Zhao , Jia Wang , Junqi Chen","doi":"10.1016/j.ijrmms.2025.106025","DOIUrl":"10.1016/j.ijrmms.2025.106025","url":null,"abstract":"<div><div>The discontinuity system exerts significant control over slope deformation and failure. Nevertheless, the automatic identification of these discontinuities remains a challenging task, particularly concerning linear discontinuities. Current methodologies are insufficient in detecting linear discontinuities, let alone conducting an analysis of their internal parameters. Consequently, this leads to imprecise guidance for rock mass engineering endeavors. This paper proposes a method for identifying linear discontinuities and researching their thermal characteristics, leveraging thermal infrared technology in conjunction with unmanned aerial vehicles. A comprehensive 24-h thermal infrared survey was conducted on the rock mass situated at the dam site of the Xulong Power Station in Yunnan Province, China, and the thermal radiation law of rock mass at the dam site was preliminarily summarized. The feasibility of identifying the linear discontinuities through the thermal radiation characteristics has been demonstrated. Furthermore, the correlation between discontinuity parameters and their thermal characteristics is established. The results indicated that the thermal characteristics of linear discontinuities (faults and joints) are closely related to their physical and geometric parameters. These findings enable the study of rock mass weathering and inference of the internal characteristics of discontinuities, thereby facilitating the analysis of slope deformation and failure.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"186 ","pages":"Article 106025"},"PeriodicalIF":7.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142990427","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

Enhancing fracture conductivity in carbonate formations through mineral alteration

IF 7 1区工程技术

International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-02-01 DOI: 10.1016/j.ijrmms.2025.106027

Xiang Chen , Haitai Hu , Pingli Liu , Juan Du , Maoxing Wang , Hongming Tang , Zhaoxu Deng , Guan Wang , Fei Liu

{"title":"Enhancing fracture conductivity in carbonate formations through mineral alteration","authors":"Xiang Chen , Haitai Hu , Pingli Liu , Juan Du , Maoxing Wang , Hongming Tang , Zhaoxu Deng , Guan Wang , Fei Liu","doi":"10.1016/j.ijrmms.2025.106027","DOIUrl":"10.1016/j.ijrmms.2025.106027","url":null,"abstract":"<div><div>In geothermal, oil, and gas reservoirs, the conductivity of hydraulic or acid-etched fracture determines efficient and economical resource exploitation. Proppant embedding or acid-rock reaction weakening rock leads to a sharp decline in fracture conductivity. Mineral alteration is a technique of in-situ transformation of existing minerals into harder minerals to improve rock strength, and diammonium hydrogen phosphate (DAP) has been shown to be an effective mineral alteration agent for high-porosity and high-permeability carbonate rocks at low temperatures. This work studied the effect of 10 wt% HCl and 0.8 M DAP solution on the hardness of rock samples (0.36%–1.31 % porosity and 2.72–17 × 10<sup>−6</sup> μm<sup>2</sup> permeability) at 25, 80, 140 and 200 °C. The experimental results proved the weakening effect of acid and the strengthening effect of DAP on rock. The mechanism of hardening caused by DAP treatment and the positive effects of high temperature were revealed. As the temperature increased, the chemical reaction between DAP and rock accelerated, resulting in an increase in the amount of reaction products (calcium phosphate) and higher crystallinity, which made the rock harder. Even at ultra-high temperatures (200 °C), DAP treatment remained remarkably effective for very dense rock samples. In addition, the relationship between rock hardness and rock embedding strength was established. The fracture conductivities under different rock hardness were calculated by Nierode-Kruk correlation and numerical method. The results indicated that it was feasible to improve the fracture conductivity through DAP treatment at high temperatures. This study provides a theoretical basis for creating high-conductivity fractures through mineral alteration in deep carbonate reservoirs.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"186 ","pages":"Article 106027"},"PeriodicalIF":7.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143077713","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

Evaluation of Forchheimer equation coefficients for nonlinear flow through rough-walled fractures during shearing 评估剪切过程中通过粗糙壁裂缝的非线性流动的福克海默方程系数

IF 7 1区工程技术

International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-02-01 DOI: 10.1016/j.ijrmms.2024.105992

Xu Zhu , Guangyao Si , Chengguo Zhang , Yingchun Li , Joung Oh

{"title":"Evaluation of Forchheimer equation coefficients for nonlinear flow through rough-walled fractures during shearing","authors":"Xu Zhu , Guangyao Si , Chengguo Zhang , Yingchun Li , Joung Oh","doi":"10.1016/j.ijrmms.2024.105992","DOIUrl":"10.1016/j.ijrmms.2024.105992","url":null,"abstract":"<div><div>The presence of complex geometric morphology of single rough-walled rock fractures and the occurrence of nonlinear flow complicate the fracture flow process. Even though the nonlinear flow behaviour in single rock fractures has been studied for decades, existing models are still limited in adequately evaluating nonlinear flow behaviour during shearing. In this study, a series of coupled shear-flow tests are conducted on single rock fractures with different surface characteristics under constant normal loads. Regression analyses of the experimental data demonstrate that the Forchheimer equation provides a robust description of nonlinear flow through rough fractures, and its nonlinear coefficients can be determined by quantifying the fracture geometries. The surface and interior geometric characteristics of the fracture are quantitatively represented. The evolutions of these geometric parameters, specifically the peak asperity height and hydraulic aperture, induced by shearing and their effects on nonlinear flow behaviours in rock fractures are also considered and incorporated. An empirical equation is then proposed for the parametric expression of the Forchheimer nonlinear coefficient, which is further used for the prediction of the flow rate during the shear-flow process and the representation of the critical Reynolds number with the fracture geometric characteristics. The proposed equations are validated against experimental results and proven to be effective in predicting and characterising the nonlinear flow behaviour in rock fractures during shearing. The experimental results and the proposed models are expected to advance the understanding and numerical modelling of the nonlinear flow behaviours in fractured rock masses for more practical applications.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"186 ","pages":"Article 105992"},"PeriodicalIF":7.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825396","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}

引用次数: 0

Water-rock interaction-induced degradation of Jinping marble in in-situ environments: A multi-scale analysis of mechanical behavior

IF 7 1区工程技术

International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-02-01 DOI: 10.1016/j.ijrmms.2024.106011

Chendi Lou , Ru Zhang , Zetian Zhang , Li Ren , Jing Xie , Kun Xiao , Mingchuan Li , Jifang Zhou , Anlin Zhang

{"title":"Water-rock interaction-induced degradation of Jinping marble in in-situ environments: A multi-scale analysis of mechanical behavior","authors":"Chendi Lou , Ru Zhang , Zetian Zhang , Li Ren , Jing Xie , Kun Xiao , Mingchuan Li , Jifang Zhou , Anlin Zhang","doi":"10.1016/j.ijrmms.2024.106011","DOIUrl":"10.1016/j.ijrmms.2024.106011","url":null,"abstract":"<div><div>In deep engineering practices, surrounding rocks are often subjected to long-term interactions between high pore pressure and high geostress environments, necessitating a thorough understanding of water-rock coupling effect under in-situ conditions. This study investigates these interactions by replicating the deep, high-pressure environment of China Jinping Underground Laboratory (CJPL) through a specially designed high-pressure water-rock coupling apparatus. The research focuses on Jinping marble, conducting in-situ stress saturation treatments under varying solvent pH conditions (7, 8, and 9) and exposure durations (1 d, 23 d, 60 d, and 100 d) at a simulated depth of 2400 m. Extensive macroscopic and microscopic mechanical tests on the treated samples reveal significant time-dependent degradation in key mechanical parameters, including fracture toughness, hardness, and deformation modulus, with the initial decline being more rapid. The fracture surfaces of rock samples treated with pressurized saturation predominantly exhibit transgranular fractures, with intergranular fractures as secondary features. The observed water-rock coupling effects arise from both physical and chemical mechanisms. Notably, within the pH range of 7–9, rock samples treated with a neutral solvent show a more pronounced deterioration trend compared to those treated with an alkaline solvent. Complementary in-situ water analysis from Jinping Mountain further indicates that high confining pressure substantially restricts water infiltration in deep environments. These insights advance the theoretical foundation for safe and effective deep engineering practices.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"186 ","pages":"Article 106011"},"PeriodicalIF":7.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142974918","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

Meso-mechanical mechanism of ordered mica alignment on the progressive failure process of granite under different lateral stress directions

IF 7 1区工程技术

International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-02-01 DOI: 10.1016/j.ijrmms.2025.106037

Chen Fan , Xia-Ting Feng , Jun Zhao , Cheng-Xiang Yang , Meng-Fei Jiang

{"title":"Meso-mechanical mechanism of ordered mica alignment on the progressive failure process of granite under different lateral stress directions","authors":"Chen Fan , Xia-Ting Feng , Jun Zhao , Cheng-Xiang Yang , Meng-Fei Jiang","doi":"10.1016/j.ijrmms.2025.106037","DOIUrl":"10.1016/j.ijrmms.2025.106037","url":null,"abstract":"<div><div>Accurately understanding the mechanical properties of surrounding rock is crucial for minimizing the risk of surrounding rock instability. In a deep TBM tunnel, mica minerals in the surrounding rock exhibit an intermittently oriented alignment, which is considered one potential cause of time-delayed failures. Under the same true triaxial stress, creep tests were conducted on granite with different strike angles <em>ω</em> when dip angle <em>β</em> = 50°, to investigate the impact of ordered mica alignment under different lateral stress directions (<em>σ</em><sub>2</sub> ≠ <em>σ</em><sub>3</sub>). Results show that the strike angle <em>ω</em> also have a significant impact on the progressive failure process of granite under true triaxial stress. In the multi-stage creep tests, the final failure strength of granite at <em>ω</em> = 0° was approximately 73 % higher than that at <em>ω</em> = 90°. Brazilian splitting tests also confirm the crack development at mica tips under different mica orientations, with the maximum difference in tensile strength reaching 37 %. The essence of the impact of mica orientation on rock failure process lies in the promotion of crack initiation and coalescence under high stress. Under a moderate dip angle <em>β</em>, relative sliding between mica cleavage planes is easier when <em>ω</em> = 60° or 90°, leading to crack initiation at mica tips and significantly compromising the load-bearing structure of granite. Based on fracture mechanics, this paper also provides theoretical explanations for the differences in mesoscopic fracturing process of granite with different mica orientations. In surrounding rock stability analyses, it is crucial to consider the complex combinations of rock microstructure and local stress state in the field, which would cause significant variations in surrounding rock stability.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"186 ","pages":"Article 106037"},"PeriodicalIF":7.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143049844","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

Enhanced discontinuity characterization in hard rock pillars using point cloud completion and DBSCAN clustering 利用点云补全和DBSCAN聚类增强硬岩柱的不连续特征

IF 7 1区工程技术

International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-02-01 DOI: 10.1016/j.ijrmms.2024.106005

Chuanqi Li , Jian Zhou , Kun Du , Ming Tao

{"title":"Enhanced discontinuity characterization in hard rock pillars using point cloud completion and DBSCAN clustering","authors":"Chuanqi Li , Jian Zhou , Kun Du , Ming Tao","doi":"10.1016/j.ijrmms.2024.106005","DOIUrl":"10.1016/j.ijrmms.2024.106005","url":null,"abstract":"<div><div>This paper proposes a novel strategy to characterize the discontinuities of hard rock pillars in underground mines. In this strategy, the point cloud completion technology is proposed to fill in the missing point clouds caused by defective digital photogrammetry. An improved density-based spatial clustering of applications with noise (DBSCAN) algorithm is developed for accurate discontinuity extraction. A case study is carried out to evaluate and verify the proposed strategy in characterizing discontinuities of hard rock pillars. Furthermore, the performance of the proposed method is compared with other conventional methods in extracting the pillar discontinuities, and the influence of point cloud completion on the characterization performance is discussed. The results indicate that the proposed strategy can accurately extract discontinuities, and that the proposed point cloud completion significantly improves characterization accuracy. Although the proposed strategy has not yet been applied or verified in the discontinuity extraction of other rock masses, it provides a new opinion and a reliable exploration for the discontinuity characterization of hard rock pillars.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"186 ","pages":"Article 106005"},"PeriodicalIF":7.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142874839","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

Elastic wave propagation and attenuation across cemented rock fractures under tension 受拉作用下胶结岩体裂隙弹性波的传播与衰减

IF 7 1区工程技术

International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-02-01 DOI: 10.1016/j.ijrmms.2025.106024

Hui Yang , Qi Zhao , Dongya Han , Qinghua Lei , Huanyu Wu , Xiaolin Huang , Zhiyi Chen , Yu Huang

{"title":"Elastic wave propagation and attenuation across cemented rock fractures under tension","authors":"Hui Yang , Qi Zhao , Dongya Han , Qinghua Lei , Huanyu Wu , Xiaolin Huang , Zhiyi Chen , Yu Huang","doi":"10.1016/j.ijrmms.2025.106024","DOIUrl":"10.1016/j.ijrmms.2025.106024","url":null,"abstract":"<div><div>Tensile loading plays a critical role in geological processes like landslides and earthquakes, as well as engineering applications such as hydraulic fracturing and tunnel excavation. We investigate elastic wave behavior across cemented rock fractures under tensile stress conditions. Ultrasonic measurements and uniaxial direct tension tests were performed concurrently on quartz diorite and diabase specimens with and without individual cemented fractures to determine the influence of tensile stress on the characteristics of elastic waves. Results show that increasing tensile stress leads to enhanced wave attenuation and reduced velocity, amplitudes, and dominant frequency of transmitted waves. These changes are primarily driven by the formation and growth of microcracks near cemented rock fractures under tensile stress. The jointed quartz diorite samples experienced progressive reductions in static and dynamic fracture stiffness. In contrast, jointed diabase samples maintained nearly constant static fracture stiffness and only saw decreases in dynamic fracture stiffness. The reduction in dynamic fracture stiffness is attributed to microscopic damage that modifies elastic wave velocity and dissipation but is not captured by static stress-strain measurements. The gradual decrease in dynamic fracture stiffness reflects stable crack growth, while sudden reductions indicate crack coalescence at the interface. We propose that dynamic fracture stiffness, assessable with seismic wave measurement, is a more reliable indicator of tensile damage than static fracture stiffness due to its sensitivity to low strains and ability to capture microstructural changes. These findings provide valuable insights into seismic methods applied to assess stress conditions on rock discontinuities in the field.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"186 ","pages":"Article 106024"},"PeriodicalIF":7.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142974945","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}

引用次数: 0

Meso-damage characterization of chemically corroded rocks under unloading confinement conditions 卸载约束条件下化学腐蚀岩石的细观损伤表征

IF 7 1区工程技术

International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-02-01 DOI: 10.1016/j.ijrmms.2024.106012

Hao Li , Leo Pel , Zhenjiang You , David Smeulders

{"title":"Meso-damage characterization of chemically corroded rocks under unloading confinement conditions","authors":"Hao Li , Leo Pel , Zhenjiang You , David Smeulders","doi":"10.1016/j.ijrmms.2024.106012","DOIUrl":"10.1016/j.ijrmms.2024.106012","url":null,"abstract":"<div><div>Characterizing meso-damage and understanding its correlation with macroscopic mechanical responses of rocks under coupled chemical-mechanical (C-M) conditions are crucial for the stability analysis and safety design of underground constructions in chemically corrosive environments. This research proposes a model to quantify coupled C-M meso-damage of rocks, utilizing geochemical surface reaction theory, statistical mechanics, thermodynamic principles, and novel principals proposed in this study, termed Random Energy Release Rate (RERR) and Effective Chemical Damage (ECD). To achieve this goal, a multiscale experimental investigation, including Nuclear Magnetic Resonance (NMR), X-ray diffraction (XRD), Scanning electron microscopy (SEM), pH and ion chromatography analysis, triaxial compression and unloading confinement tests, is employed to examine meso-damage evolution and its linkage with the macro-mechanical responses of limestone under coupled C-M conditions. Based on the experimental investigations, the ECD model is introduced to differentiate chemical damage into effective and apparent categories. Then RERR is proposed to characterize the heterogeneity of damage. Utilizing ECD, along with RERR, the coupled C-M meso-damage model is finally proposed and validated with experimental data. Results show that the evolution of coupled C-M damage follows an S-shaped curve with four stages; Confining pressure limits ECD and C-M damage development, while ECD accelerates C-M damage; As dual-pore geo-media, RERR predominantly originate from the crack-like pores, and ECD is closely tied to crack-like pore closure and rock skeleton flexibility.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"186 ","pages":"Article 106012"},"PeriodicalIF":7.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142974946","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}

引用次数: 0

A micromechanical model for induced anisotropic damage-friction in rock materials under cyclic loading 循环加载下岩石材料诱导各向异性损伤-摩擦细观力学模型

IF 7 1区工程技术

International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-02-01 DOI: 10.1016/j.ijrmms.2024.106014

Jin Zhang , Wenyong Liu , Qiaojuan Yu , Qi-Zhi Zhu , Jian-Fu Shao

{"title":"A micromechanical model for induced anisotropic damage-friction in rock materials under cyclic loading","authors":"Jin Zhang , Wenyong Liu , Qiaojuan Yu , Qi-Zhi Zhu , Jian-Fu Shao","doi":"10.1016/j.ijrmms.2024.106014","DOIUrl":"10.1016/j.ijrmms.2024.106014","url":null,"abstract":"<div><div>This study develops a unified micromechanical induced anisotropic model to predict the instantaneous and longterm behaviors of rock materials under cyclic loading. By integrating a thermodynamic framework with the Mori–Tanaka homogenization method, the model captures the anisotropic damage evolution considering nonuniform microcrack growth. The model incorporates the interaction between microcrack-induced damage and frictional effects, enabling a more accurate prediction of nonlinear behaviors. A fatigue damage variable is introduced to represent the progressive degradation. The plastic deformation is attributed to frictional sliding along oriented microcracks, while instantaneous and fatigue damage evolution are driven by crack growth and subcritical cracking, respectively. The model is validated against experimental data for varying rock types, demonstrating its ability to reproduce key mechanical behaviors, including nonlinear mechanical response, fatigue life, and nonuniform damage evolution. The proposed model provides a robust and comprehensive framework for analyzing the longterm behavior under cyclic loadings.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"186 ","pages":"Article 106014"},"PeriodicalIF":7.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929219","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}

引用次数: 0