Rock Mechanics Bulletin最新文献

Control of rock burst during deep tunnel blasting excavation based on energy release process optimizing 基于能量释放过程优化的深埋巷道爆破开挖地压控制

IF 7

Rock Mechanics Bulletin Pub Date : 2025-08-23 DOI: 10.1016/j.rockmb.2025.100239

Sheng Luo , Qian Yuan , Dong Zhihong , Zhou Liming , Zhou Chunhua , Yang Zhaowei , Yan Peng

{"title":"Control of rock burst during deep tunnel blasting excavation based on energy release process optimizing","authors":"Sheng Luo , Qian Yuan , Dong Zhihong , Zhou Liming , Zhou Chunhua , Yang Zhaowei , Yan Peng","doi":"10.1016/j.rockmb.2025.100239","DOIUrl":"10.1016/j.rockmb.2025.100239","url":null,"abstract":"<div><div>Blasting is widely used in hard rock tunnel excavation but often deteriorates the mechanical properties of the rock mass, forming a disturbance zone associated with energy evolution in the surrounding rock. In high-stress environments, this disturbance zone poses risks of engineering disasters like rock bursts. Previous studies confirm that optimizing the energy release process is an effective strategy for rock burst control. This research focuses on enhancing energy path optimization by analyzing parameters affecting the formation of the disturbance zone. Specifically, we conducted a sensitivity analysis of key blasting parameters, including caving hole spacing, caving blasting load, smooth blasting burden, hole spacing, and smooth blasting load. By exploring the impact of caving and smooth blasting under varied design conditions, we developed a method to control rock bursts through staged energy release, gradually disturbing the surrounding rock. Results indicate that aligning the disturbance zones induced by caving and smooth blasting can regulate the energy release process effectively, a staged and controlled energy release process is proposed to modulate the distribution and timing of strain energy dissipation, thereby reducing the risk of dynamic failure. This approach presents a novel method for managing rock burst tendencies in high-stress rock tunnel excavations.</div></div>","PeriodicalId":101137,"journal":{"name":"Rock Mechanics Bulletin","volume":"5 1","pages":"Article 100239"},"PeriodicalIF":7.0,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144989683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent advancements for cement grout diffusion mechanisms within rock fractures 岩石裂隙内水泥浆扩散机制研究进展

IF 7

Rock Mechanics Bulletin Pub Date : 2025-08-22 DOI: 10.1016/j.rockmb.2025.100237

Haizhi Zang, Shanyong Wang

{"title":"Recent advancements for cement grout diffusion mechanisms within rock fractures","authors":"Haizhi Zang, Shanyong Wang","doi":"10.1016/j.rockmb.2025.100237","DOIUrl":"10.1016/j.rockmb.2025.100237","url":null,"abstract":"<div><div>Understanding cement grout diffusion in rock fractures is crucial for rock engineering, yet grouting faces significant challenges due to fracture network heterogeneity and grout's complex non-Newtonian rheology. This study critically reviews recent theoretical, experimental, and numerical advancements to comprehensively understand cement grout diffusion mechanisms within rock fractures. It begins by discussing theoretical foundations, encompassing both continuum and particulate views in single fractures, while also highlighting limitations in extending these simplified concepts to fracture networks and defining robust stop criteria. Subsequently, the article details developments in experiments, including novel apparatus and advanced monitoring techniques. These enable controlled observation of grout diffusion in artificial or simulated fractures, providing crucial insights into the impact of fracture complexities (e.g., fracture roughness, two-phase flow) on grout patterns and sealing efficiency. These laboratory tests also inform the development of practical stop criteria by revealing actual grout behaviour under various conditions. Complementary numerical methods offer a distinct advantage by providing dynamic, continuous solutions for complex fracture networks that are otherwise intractable. Collectively, these diverse approaches bridge critical knowledge gaps, from fundamental principles to real-world complexities, and facilitate cross-scale validation. The review concludes by identifying persistent challenges, such as integrating multi-scale descriptions and simulating true field complexities, and outlines future research directions to understand grout diffusion mechanisms.</div></div>","PeriodicalId":101137,"journal":{"name":"Rock Mechanics Bulletin","volume":"5 2","pages":"Article 100237"},"PeriodicalIF":7.0,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrative solution of stress evolution in overburden roof strata during the coal seam mining by application of complex variable functions methodology 应用复变函数法综合求解煤层开采覆岩顶板应力演化

IF 7

Rock Mechanics Bulletin Pub Date : 2025-08-22 DOI: 10.1016/j.rockmb.2025.100236

Yinkai Li , Hongwei Wang , Zhanbin Zhu , Daixin Deng , Naisheng Jiang

{"title":"Integrative solution of stress evolution in overburden roof strata during the coal seam mining by application of complex variable functions methodology","authors":"Yinkai Li , Hongwei Wang , Zhanbin Zhu , Daixin Deng , Naisheng Jiang","doi":"10.1016/j.rockmb.2025.100236","DOIUrl":"10.1016/j.rockmb.2025.100236","url":null,"abstract":"<div><div>Large-scale roof collapse is a major dynamic hazard threatening the safe coal mine operations. Understanding the deformation and failure characteristics of overburden rock strata, as well as deciphering the stress evolution mechanism of overburden rock structure in mining stopes, is of great theoretical advancement and engineering applications in roof disasters prevention. This study employs a theoretical derivation to systematically analyze the characteristics of overburden roof deformation and caving behavior during the coal seam mining. By modeling the trapezoidal caving zone in the overburden roof strata as a complex functional system, the stress distribution within the caving zone and adjacent intact strata was mathematically characterized. Stress evolution patterns of overburden strata at different caving stages were derived under both elastic and elastoplastic deformation conditions, accompanied by the demarcation of elastic-plastic zones. In addition, the critical length for the first caving and periodic caving of overburden are theoretically determined. To validate the proposed analytical framework, comprehensive numerical simulation and physical model tests are conducted to investigate the overburden roof caving characteristics during coal seam mining. Quantitative comparisons between experimental, numerical results and theoretical analyses were performed in terms of the caving range of roof strata, the critical length for the roof strata caving and stress distribution. The consistencies among different approaches confirms the reliability of the theoretical model, providing a robust foundation for optimizing mining designs and implementing effective roof control strategies.</div></div>","PeriodicalId":101137,"journal":{"name":"Rock Mechanics Bulletin","volume":"5 2","pages":"Article 100236"},"PeriodicalIF":7.0,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145269218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrative solution of stress evolution in overburden roof strata during the coal seam mining by application of complex variable functions methodology 应用复变函数法综合求解煤层开采覆岩顶板应力演化

IF 7

Rock Mechanics Bulletin Pub Date : 2025-08-22 DOI: 10.1016/j.rockmb.2025.100236

Yinkai Li , Hongwei Wang , Zhanbin Zhu , Daixin Deng , Naisheng Jiang

{"title":"Integrative solution of stress evolution in overburden roof strata during the coal seam mining by application of complex variable functions methodology","authors":"Yinkai Li , Hongwei Wang , Zhanbin Zhu , Daixin Deng , Naisheng Jiang","doi":"10.1016/j.rockmb.2025.100236","DOIUrl":"10.1016/j.rockmb.2025.100236","url":null,"abstract":"<div><div>Large-scale roof collapse is a major dynamic hazard threatening the safe coal mine operations. Understanding the deformation and failure characteristics of overburden rock strata, as well as deciphering the stress evolution mechanism of overburden rock structure in mining stopes, is of great theoretical advancement and engineering applications in roof disasters prevention. This study employs a theoretical derivation to systematically analyze the characteristics of overburden roof deformation and caving behavior during the coal seam mining. By modeling the trapezoidal caving zone in the overburden roof strata as a complex functional system, the stress distribution within the caving zone and adjacent intact strata was mathematically characterized. Stress evolution patterns of overburden strata at different caving stages were derived under both elastic and elastoplastic deformation conditions, accompanied by the demarcation of elastic-plastic zones. In addition, the critical length for the first caving and periodic caving of overburden are theoretically determined. To validate the proposed analytical framework, comprehensive numerical simulation and physical model tests are conducted to investigate the overburden roof caving characteristics during coal seam mining. Quantitative comparisons between experimental, numerical results and theoretical analyses were performed in terms of the caving range of roof strata, the critical length for the roof strata caving and stress distribution. The consistencies among different approaches confirms the reliability of the theoretical model, providing a robust foundation for optimizing mining designs and implementing effective roof control strategies.</div></div>","PeriodicalId":101137,"journal":{"name":"Rock Mechanics Bulletin","volume":"5 2","pages":"Article 100236"},"PeriodicalIF":7.0,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145269796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A multi-frequency ultrasonic amplitude attenuation method for identifying damage of rock 一种用于岩石损伤识别的多频超声振幅衰减方法

IF 7

Rock Mechanics Bulletin Pub Date : 2025-08-22 DOI: 10.1016/j.rockmb.2025.100238

Yiming Gu , Zhe Li , Yun Chen , Yuliang Zhang

{"title":"A multi-frequency ultrasonic amplitude attenuation method for identifying damage of rock","authors":"Yiming Gu , Zhe Li , Yun Chen , Yuliang Zhang","doi":"10.1016/j.rockmb.2025.100238","DOIUrl":"10.1016/j.rockmb.2025.100238","url":null,"abstract":"<div><div>High-temperature damage in rocks significantly affects ultrasonic amplitude attenuation. Inverting rock damage through amplitude attenuation offers a rapid, non-destructive, and convenient detection method. However, the single-frequency ultrasonic testing method, due to its single amplitude attenuation parameter and relatively large experimental error, is difficult to fully reflect the material's characteristics, ultrasonic flaw detection methods based on multi-frequency amplitude attenuation are relatively scarce. To address this, the study proposes a multi-frequency ultrasonic amplitude attenuation detection method, eliminating single-frequency measurement errors and accurately characterizing the attenuation behavior of thermally damaged rocks. Experimental results show that after high-temperature treatment, P-wave amplitude attenuation increases progressively with frequency (by 50%), whereas S-wave attenuation first decreases and then rises. A correlation model between amplitude attenuation and damage variables was established, confirming that P-wave attenuation effectively quantifies rock damage. The study initially explored the interaction mechanism between multi-frequency ultrasonic and fractures: low-frequency waves exhibit increased attenuation due to boundary reflections, while high-frequency waves show enhanced attenuation as diffraction effects weaken. These findings bridge a critical gap in multi-frequency amplitude attenuation research and provide a scientific basis for identifying high-temperature damage in rocks.</div></div>","PeriodicalId":101137,"journal":{"name":"Rock Mechanics Bulletin","volume":"5 1","pages":"Article 100238"},"PeriodicalIF":7.0,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144989680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent advancements for cement grout diffusion mechanisms within rock fractures 岩石裂隙内水泥浆扩散机制研究进展

IF 7

Rock Mechanics Bulletin Pub Date : 2025-08-22 DOI: 10.1016/j.rockmb.2025.100237

Haizhi Zang, Shanyong Wang

{"title":"Recent advancements for cement grout diffusion mechanisms within rock fractures","authors":"Haizhi Zang, Shanyong Wang","doi":"10.1016/j.rockmb.2025.100237","DOIUrl":"10.1016/j.rockmb.2025.100237","url":null,"abstract":"<div><div>Understanding cement grout diffusion in rock fractures is crucial for rock engineering, yet grouting faces significant challenges due to fracture network heterogeneity and grout's complex non-Newtonian rheology. This study critically reviews recent theoretical, experimental, and numerical advancements to comprehensively understand cement grout diffusion mechanisms within rock fractures. It begins by discussing theoretical foundations, encompassing both continuum and particulate views in single fractures, while also highlighting limitations in extending these simplified concepts to fracture networks and defining robust stop criteria. Subsequently, the article details developments in experiments, including novel apparatus and advanced monitoring techniques. These enable controlled observation of grout diffusion in artificial or simulated fractures, providing crucial insights into the impact of fracture complexities (e.g., fracture roughness, two-phase flow) on grout patterns and sealing efficiency. These laboratory tests also inform the development of practical stop criteria by revealing actual grout behaviour under various conditions. Complementary numerical methods offer a distinct advantage by providing dynamic, continuous solutions for complex fracture networks that are otherwise intractable. Collectively, these diverse approaches bridge critical knowledge gaps, from fundamental principles to real-world complexities, and facilitate cross-scale validation. The review concludes by identifying persistent challenges, such as integrating multi-scale descriptions and simulating true field complexities, and outlines future research directions to understand grout diffusion mechanisms.</div></div>","PeriodicalId":101137,"journal":{"name":"Rock Mechanics Bulletin","volume":"5 2","pages":"Article 100237"},"PeriodicalIF":7.0,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development characteristics and prediction methods of the “three zones” in overlying strata under the 110 mining method 110采矿法下覆岩“三带”发育特征及预测方法

IF 7

Rock Mechanics Bulletin Pub Date : 2025-08-21 DOI: 10.1016/j.rockmb.2025.100234

Xiaojie Yang , Xuhui Kang , Manchao He , Yajun Wang , Jun Zhang , Zhen Shi , Yuwen Chen

{"title":"Development characteristics and prediction methods of the “three zones” in overlying strata under the 110 mining method","authors":"Xiaojie Yang , Xuhui Kang , Manchao He , Yajun Wang , Jun Zhang , Zhen Shi , Yuwen Chen","doi":"10.1016/j.rockmb.2025.100234","DOIUrl":"10.1016/j.rockmb.2025.100234","url":null,"abstract":"<div><div>The 110 mining method is a novel coal mining approach that is environmentally friendly. To investigate the movement laws of the overburden strata under the mining conditions of this method, this study systematically analyzed the development characteristics and formation mechanisms of the “three zones” of the overburden strata (caving zone, fractured zone, and flexural subsidence zone). A predictive model for the development height of the “three zones” was established based on the mining damage invariant equation and the pressure arch theory, and a quantitative criterion for the boundary between the caving zone and fractured zone was proposed.To verify the reliability of the model, the 8302 working face of Jinjiazhuang Coal Mine was selected as the research object. A combination of theoretical analysis and on-site monitoring was employed to conduct prediction and in-situ monitoring experiments on the height of the “three zones” and the surface conditions of the goaf. The results show that the relative error between the predicted height of the caving zone by the model and the measured value is +0.38 m, and the relative error for the fractured zone height is −1.55 m, indicating a high prediction accuracy.The predictive model established in this study provides a theoretical basis for the safe and efficient mining as well as the overburden control in the 110 mining method. The research findings have significant engineering application value for promoting the development of green coal mining technologies.</div></div>","PeriodicalId":101137,"journal":{"name":"Rock Mechanics Bulletin","volume":"5 1","pages":"Article 100234"},"PeriodicalIF":7.0,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144989682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integration of image and dipole sonic logs for identification of natural fractures and stress-induced anisotropy in Asmari reservoir (A case study, SW Iran) 结合图像和偶极子声波测井识别Asmari储层天然裂缝和应力诱导的各向异性（以伊朗西南部为例）

IF 7

Rock Mechanics Bulletin Pub Date : 2025-08-21 DOI: 10.1016/j.rockmb.2025.100235

Maziar Torkaman , Soheila Bagheri , Mahdi Rastegarnia

{"title":"Integration of image and dipole sonic logs for identification of natural fractures and stress-induced anisotropy in Asmari reservoir (A case study, SW Iran)","authors":"Maziar Torkaman , Soheila Bagheri , Mahdi Rastegarnia","doi":"10.1016/j.rockmb.2025.100235","DOIUrl":"10.1016/j.rockmb.2025.100235","url":null,"abstract":"<div><div>Borehole sonic dispersion analysis is a technique that provides valuable insights into the realm of borehole sonic interpretation. This research involves an analysis of shear-wave anisotropy and ultrasonic image logs to differentiate between types of fractures and their orientations. Evaluating fractures relies on core samples and image logs are limited. This highlights the need for a more affordable and efficient way to analyse fractures. A challenge in the wellbore is distinguishing natural fractures from those caused by drilling. Using oil-based mud often makes it hard to find signs indicating the direction of in-situ stress. A new method has been created to reliably identify natural fractures when image logs are insufficient for mapping fracture networks. The cross-dipole data reveals five main zones exhibiting shear-wave splitting. Higher anisotropy is observed at shallower depths, while the deeper interval shows low porosity accompanied by considerable inhomogeneity, highlighting potential areas of concern. The dominant directions of anisotropy are aligned with NW-SE, WNW-ESE, and N-S orientations. Slowness frequency analysis of rotated flexural waves identifies fracture types. Dispersion profiles show natural and induced fractures, with cross-over patterns indicating stress-induced anisotropy. Significant inhomogeneity is observed in the bottom interval, where the differences between maximum and minimum energy level are pronounced. Wider dispersion curves suggest breakouts are slowing high-frequency flexural waves, indicating mechanical damage. The maximum stress direction is determined by the fast-shear azimuth. In conclusion, this study demonstrates that by integrating acoustic shear dispersion, shear anisotropy, Stoneley analysis, and image log data, fractures within the borehole wall can be effectively investigated.</div></div>","PeriodicalId":101137,"journal":{"name":"Rock Mechanics Bulletin","volume":"5 2","pages":"Article 100235"},"PeriodicalIF":7.0,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145120969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integration of image and dipole sonic logs for identification of natural fractures and stress-induced anisotropy in Asmari reservoir (A case study, SW Iran) 结合图像和偶极子声波测井识别Asmari储层天然裂缝和应力诱导的各向异性（以伊朗西南部为例）

IF 7

Rock Mechanics Bulletin Pub Date : 2025-08-21 DOI: 10.1016/j.rockmb.2025.100235

Maziar Torkaman , Soheila Bagheri , Mahdi Rastegarnia

{"title":"Integration of image and dipole sonic logs for identification of natural fractures and stress-induced anisotropy in Asmari reservoir (A case study, SW Iran)","authors":"Maziar Torkaman , Soheila Bagheri , Mahdi Rastegarnia","doi":"10.1016/j.rockmb.2025.100235","DOIUrl":"10.1016/j.rockmb.2025.100235","url":null,"abstract":"<div><div>Borehole sonic dispersion analysis is a technique that provides valuable insights into the realm of borehole sonic interpretation. This research involves an analysis of shear-wave anisotropy and ultrasonic image logs to differentiate between types of fractures and their orientations. Evaluating fractures relies on core samples and image logs are limited. This highlights the need for a more affordable and efficient way to analyse fractures. A challenge in the wellbore is distinguishing natural fractures from those caused by drilling. Using oil-based mud often makes it hard to find signs indicating the direction of in-situ stress. A new method has been created to reliably identify natural fractures when image logs are insufficient for mapping fracture networks. The cross-dipole data reveals five main zones exhibiting shear-wave splitting. Higher anisotropy is observed at shallower depths, while the deeper interval shows low porosity accompanied by considerable inhomogeneity, highlighting potential areas of concern. The dominant directions of anisotropy are aligned with NW-SE, WNW-ESE, and N-S orientations. Slowness frequency analysis of rotated flexural waves identifies fracture types. Dispersion profiles show natural and induced fractures, with cross-over patterns indicating stress-induced anisotropy. Significant inhomogeneity is observed in the bottom interval, where the differences between maximum and minimum energy level are pronounced. Wider dispersion curves suggest breakouts are slowing high-frequency flexural waves, indicating mechanical damage. The maximum stress direction is determined by the fast-shear azimuth. In conclusion, this study demonstrates that by integrating acoustic shear dispersion, shear anisotropy, Stoneley analysis, and image log data, fractures within the borehole wall can be effectively investigated.</div></div>","PeriodicalId":101137,"journal":{"name":"Rock Mechanics Bulletin","volume":"5 2","pages":"Article 100235"},"PeriodicalIF":7.0,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of bedding orientation on shale damage evolution: A combined in-situ micro-CT and digital volume correlation investigation 层理取向对页岩损伤演化的影响：原位微ct与数字体积相关研究

IF 7

Rock Mechanics Bulletin Pub Date : 2025-08-15 DOI: 10.1016/j.rockmb.2025.100225

Liang Zhang , Yingjie Li , Liu Yang , Shengxin Liu , Dejun Liu , Bingqian Wang

{"title":"Influence of bedding orientation on shale damage evolution: A combined in-situ micro-CT and digital volume correlation investigation","authors":"Liang Zhang , Yingjie Li , Liu Yang , Shengxin Liu , Dejun Liu , Bingqian Wang","doi":"10.1016/j.rockmb.2025.100225","DOIUrl":"10.1016/j.rockmb.2025.100225","url":null,"abstract":"<div><div>The bedding structure of shale significantly influences its mechanical anisotropy. However, the meso-scale anisotropic control mechanism of bedding on shale damage evolution remains insufficiently understood. This study employs in-situ uniaxial compression CT scanning experiments, combined with grayscale thresholding and deep learning-based image segmentation, to achieve high-precision 3D reconstructions of shale pore-fracture networks. Additionally, by integrating Digital Volume Correlation (DVC) with image analysis, a cross-scale quantitative characterization and synergistic evaluation are conducted, bridging the evolution of microstructural damage with macroscopic full-field deformation in bedded shale. The results reveal that: (1) The dominant geometric factors influencing the complexity of the shale pore-fracture network during loading vary with bedding orientation: number and spatial distribution dominate for 0° shale, volume and area for 30°/60° shale, and coupled geometric parameters for 90° shale. (2) Displacement and strain fields exhibit distinct characteristics related to the bedding angle: 0° shale shows quasi-uniform deformation dominated by axial compaction; 30° and 60° shales form significant strain concentration bands along bedding planes due to shear slip effects; 90° shale is driven by radial tension, leading to tensile strain localization parallel to the bedding direction. (3) The strain accommodation mechanism in shale transitions with the bedding angle: it shifts from being dominated by matrix compaction and diffuse micro-damage at low angles to being primarily controlled by fracture propagation along bedding planes at high angles. In high-angle bedded shale, pre-existing pores and fractures tend to preferentially act as nucleation sites for damage initiation and strain localization.</div></div>","PeriodicalId":101137,"journal":{"name":"Rock Mechanics Bulletin","volume":"5 1","pages":"Article 100225"},"PeriodicalIF":7.0,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144989681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0