Rock Mechanics Bulletin最新文献_第3页

Fast marching method-based bent-ray tracing for three-dimensional velocity imaging in mines 基于快速行军法的弯曲射线追踪矿井三维速度成像

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Rock Mechanics Bulletin Pub Date : 2026-04-01 Epub Date: 2025-10-25 DOI: 10.1016/j.rockmb.2025.100262

Jie Yang , Xueyi Shang , Linghao Liu , Yi Wang , Xibing Li

{"title":"Fast marching method-based bent-ray tracing for three-dimensional velocity imaging in mines","authors":"Jie Yang , Xueyi Shang , Linghao Liu , Yi Wang , Xibing Li","doi":"10.1016/j.rockmb.2025.100262","DOIUrl":"10.1016/j.rockmb.2025.100262","url":null,"abstract":"<div><div>Three-dimensional (3D) seismic velocity imaging is crucial for understanding rock mass stress and structures in mining. Conventional straight-ray tomography suffers from ray-path mismatches with true wavefield propagation in complex media, leading to reduced velocity model accuracy. To address this, we propose a 3D velocity imaging method that integrates the Fast Marching Method (FMM) for bent-ray tracing with the Algebraic Reconstruction Technique (ART) for velocity inversion. The proposed approach was validated through checkerboard tests, recovery tests, and laboratory Lead-Break experiments. Results show that FMM-based ray tracing significantly improves inversion accuracy, achieving root-mean-square (RMS) travel-time residuals of 1.39 ms and 28.66 ms in recovery and field tests, corresponding to reductions of 76.6% and 18.6% compared with straight ray tracing-based methods. Application in the Yongshaba mine, Guizhou Province, China, revealed a distinct low-velocity zone surrounded by high-velocity regions, which is consistent with mining activities and excavation plans. This study demonstrates that the FMM-ART framework provides a robust and accurate tool for mine-scale velocity imaging, with implications for monitoring stress evolution, improving safety, and potential integration with real-time monitoring.</div></div>","PeriodicalId":101137,"journal":{"name":"Rock Mechanics Bulletin","volume":"5 2","pages":"Article 100262"},"PeriodicalIF":7.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145520510","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）

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Rock Mechanics Bulletin Pub Date : 2026-04-01 Epub 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":"2026-04-01","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

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

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Rock Mechanics Bulletin Pub Date : 2026-04-01 Epub 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":"2026-04-01","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

Computational large deformation geomechanics with a focus on the periporomechanics paradigm 计算大变形地质力学，聚焦于孔隙力学范式

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Rock Mechanics Bulletin Pub Date : 2026-01-01 Epub Date: 2025-08-05 DOI: 10.1016/j.rockmb.2025.100224

Xiaoyu Song , Andrew J. Whittle , Shashank Menon

{"title":"Computational large deformation geomechanics with a focus on the periporomechanics paradigm","authors":"Xiaoyu Song , Andrew J. Whittle , Shashank Menon","doi":"10.1016/j.rockmb.2025.100224","DOIUrl":"10.1016/j.rockmb.2025.100224","url":null,"abstract":"<div><div>This article presents a state-of-the-art review of computational large deformation geomechanics, focusing on the recently developed periporomechanics (PPM) paradigm. PPM is a nonlocal reformulation of classical continuum poromechanics for geomaterials through peridynamic states and the effective force concept. The governing equations are integral-differential equations in which a length scale is present. In PPM, the porous media, such as geomaterials, are assumed to consist of a finite number of mixed material points which have two types of degrees of freedom, i.e., solid displacement and pore fluid pressure. Consistent with its mathematical formulation, the field equations of PPM are spatially discretized by a hybrid Lagrangian-Eulerian meshless method. Thus, PPM is robust for modeling large deformation and discontinuities in geomaterials. First, we review the recent development of the coupled PPM for modeling coupled solid deformation and fluid flow processes in deformable porous materials. Second, we review the advancement of PPM for modeling large deformation in geomaterials. Third, we present numerical examples to showcase the efficacy of the PPM paradigm for modeling large deformation in variably saturated geomaterials. Finally, we summarize the research needs and present work in PPM for modeling large deformation in geomaterials with applications in geo-hazards such as landslides.</div></div>","PeriodicalId":101137,"journal":{"name":"Rock Mechanics Bulletin","volume":"5 1","pages":"Article 100224"},"PeriodicalIF":7.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220953","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

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Rock Mechanics Bulletin Pub Date : 2026-01-01 Epub 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":"2026-01-01","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

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

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Rock Mechanics Bulletin Pub Date : 2026-01-01 Epub 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":"2026-01-01","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

Variable elastic anisotropy controls stress in shallow crown pillars 变弹性各向异性控制浅顶柱应力

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Rock Mechanics Bulletin Pub Date : 2026-01-01 Epub Date: 2025-05-09 DOI: 10.1016/j.rockmb.2025.100212

Jorge Cortez , John Browning , Carlos Marquardt , Matías Clunes , Nicolás Carmona , Philip Benson , Nick Koor

{"title":"Variable elastic anisotropy controls stress in shallow crown pillars","authors":"Jorge Cortez , John Browning , Carlos Marquardt , Matías Clunes , Nicolás Carmona , Philip Benson , Nick Koor","doi":"10.1016/j.rockmb.2025.100212","DOIUrl":"10.1016/j.rockmb.2025.100212","url":null,"abstract":"<div><div>As easily accessible natural resources become depleted, it is necessary to extract material from deeper levels and so mines may opt to develop a process of transition from open-pit to underground mining methods. In some cases, however, the process develops in the opposite direction where shallower resources from historic underground districts are mined by surface extraction methods. In both cases, it is necessary to maintain a crown pillar to ensure the stability of the pit and underground infrastructure. The dimensions of these crown pillars are typically designed using a combination of empirical methods and numerical modelling. In both methodologies, rocks are often treated as elastic and isotropic materials, even when they exhibit a clear direction of anisotropy caused by bedding planes, foliation, or closely spaced joints. To explore the role of this anisotropy in the stress state surrounding and within crown pillars, a series of two-dimensional finite element models were built using the code FEniCS. The results of this study show that tectonic loading leads to significantly higher compressive stresses, 2 to 4 times greater than gravitational loads alone. Tensile stress also increases notably, with values reaching almost −11 MPa compared to −1 MPa under gravitational loads. Therefore, the degrees of anisotropy and its orientation is likely to play a significant role in stress distribution. Our findings highlight the importance of constraining the in-situ stress, the geology of the host rock and the degree of anisotropy at laboratory scale for adequately addressing the risk of crown pillar failure and mining subsidence.</div></div>","PeriodicalId":101137,"journal":{"name":"Rock Mechanics Bulletin","volume":"5 1","pages":"Article 100212"},"PeriodicalIF":7.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158411","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

Tensile failure and ductile-to-brittle transition of sandstone under three-dimensional seepage pressure 三维渗流压力下砂岩的拉伸破坏与韧脆转变

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Rock Mechanics Bulletin Pub Date : 2026-01-01 Epub Date: 2025-07-17 DOI: 10.1016/j.rockmb.2025.100222

Xiang Fu , Kecheng Ji , Aiqing Wu , Qiang Xie , Yuxin Ban

{"title":"Tensile failure and ductile-to-brittle transition of sandstone under three-dimensional seepage pressure","authors":"Xiang Fu , Kecheng Ji , Aiqing Wu , Qiang Xie , Yuxin Ban","doi":"10.1016/j.rockmb.2025.100222","DOIUrl":"10.1016/j.rockmb.2025.100222","url":null,"abstract":"<div><div>After reservoir impoundment, fractures and pores in the rock mass serve as important pathways for seepage, and the resulting fluid pressure can easily trigger engineering issues such as slope instability and dam deformation. To investigate the mechanical properties and failure characteristics of sandstone under hydro-mechanical coupling, triaxial compression tests were conducted under various confining pressures. Combined with acoustic emission monitoring and numerical simulations, this study revealed the internal failure mechanisms and mechanical responses of sandstone in its natural state, after soaking, and under seepage pressure. The experimental results indicate that: (1) with increasing confining pressure, the failure mode of natural and soaked sandstone samples transitions from brittle to ductile, whereas under seepage pressure the failure mode shifts from ductile to brittle; (2) natural sandstone predominantly fails by shear, while soaked sandstone exhibits a mixed failure mode dominated by shear, and under seepage pressure, the samples display a mixed failure mode dominated by splitting; (3) as confining pressure increases, crack propagation is suppressed, leading to a transition from tension-dominated to shear-dominated failure; soaking facilitates stable crack propagation, thereby delaying ultimate failure and exhibiting significant ductile characteristics, whereas seepage pressure accelerates crack development, significantly reducing rock strength and markedly enhancing brittle failure characteristics.</div></div>","PeriodicalId":101137,"journal":{"name":"Rock Mechanics Bulletin","volume":"5 1","pages":"Article 100222"},"PeriodicalIF":7.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158410","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

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

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Rock Mechanics Bulletin Pub Date : 2026-01-01 Epub 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":"2026-01-01","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

A novel damage model on the acoustic emission characteristics of weakly cemented soft rock under alkaline water-enriched environment 碱性富水环境下弱胶结软岩声发射特征损伤新模型

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Rock Mechanics Bulletin Pub Date : 2026-01-01 Epub Date: 2025-07-18 DOI: 10.1016/j.rockmb.2025.100221

Jiashun Liu , Ni Zhou , Hui Zhou , Zhiyong Zheng , Xuefeng Zhang , Zhiqiang Lv , Jin Yu

{"title":"A novel damage model on the acoustic emission characteristics of weakly cemented soft rock under alkaline water-enriched environment","authors":"Jiashun Liu , Ni Zhou , Hui Zhou , Zhiyong Zheng , Xuefeng Zhang , Zhiqiang Lv , Jin Yu","doi":"10.1016/j.rockmb.2025.100221","DOIUrl":"10.1016/j.rockmb.2025.100221","url":null,"abstract":"<div><div>Mechanical properties of weakly cemented soft rock (WCSR) under alkaline water-enriched environment are vital to the stability of surrounding rock. The specimens were soaked in various chemical solutions, and a series of experiments including X-ray diffraction (XRD), scanning electron microscopy (SEM) and uniaxial compression tests with acoustic emission (AE) were performed to study AE characteristics, damage evolution characteristics, and corrosion mechanisms of WCSR. The experimental results demonstrated that with the increase of pH values, the upward trend of the accumulative count curves became flatter, the crack propagation rate was more stable, and the energy release was more moderate. Cracks were classified based on AE characteristic parameters RA and AF. The difference between the tension cracks and shear cracks at deionized water and pH = 7 solutions was smaller than 10%, while the difference between the pH = 10 and pH = 12 solutions was 19.6% and 26.54%, respectively. The increase in pH value significantly enhanced the propagation of tensile cracks and the complexity of failure model. Based on Mazars damage model, a novel damage model describing strain softening of WCSR was established by introducing accumulative count, which can better characterize the post-peak strain softening characteristics and damage evolution. In addition, the corrosion mechanism of soft rock under alkaline water-enriched is revealed from a microscopic perspective. The research results will provide significance guiding for deformation control of soft rock roadway and its disaster prevention under alkaline water-enriched environment.</div></div>","PeriodicalId":101137,"journal":{"name":"Rock Mechanics Bulletin","volume":"5 1","pages":"Article 100221"},"PeriodicalIF":7.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145266979","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