Theoretical and Applied Fracture Mechanics最新文献

{"title":"Research on the mechanical anisotropy and crack propagation in composite rock masses containing weak interlayers and double fissures","authors":"Mingchao Wan ,&nbsp;Nan Yao ,&nbsp;Binyu Luo ,&nbsp;Zheng Wan ,&nbsp;Yicheng Ye","doi":"10.1016/j.tafmec.2026.105471","DOIUrl":"10.1016/j.tafmec.2026.105471","url":null,"abstract":"<div><div>Layered rock masses, as complex geological media, exhibit mechanical behaviors predominantly controlled by internal weak interlayers and inherent fissures. This study aims to reveal the anisotropic characteristics of the mechanical behavior of layered rock masses under the interaction between weak interlayers and fissures. Uniaxial compression tests were conducted on rock-like specimens containing weak interlayers and prefabricated double fissures, combined with Digital Image Correlation (DIC) and Acoustic Emission (AE) monitoring techniques, to analyze the damage evolution process and the mechanical mechanisms of crack propagation. The results indicate that: (1) The initiation and propagation of tensile wing cracks at the fracture tips exhibit a strong competitive advantage, which weakens as the bedding dip angle increases. (2) The rock bridge serves as a key area for stress concentration and is influenced by the bridging angle <em>β</em>, governing the type of dominant cracks and the pattern of coalescence. (3) The weak interlayer significantly alters the interlayer stress field, inducing cracks to initiate vertically to the interlayer interface or to deflect, while demonstrating typical “barrier” and “guiding” dip effects on tip cracks. (4) The failure mode of the rock mass is primarily characterized by composite failure involving tensile cracking at the tips and penetration through the weak interlayer and hard rock layers. The propagation path is jointly influenced by the fracture dip angle, bridging angle, and the activation state of interlayer shear slip. This study reveals that when the double fissure layout (rock bridge dip angle) is oriented opposite to the dip direction of the weak interlayer, the pillar system is most susceptible to penetrating shear instability failure. Meanwhile, an increase in the bedding dip angle promotes slip along the weak interlayer, which reduces mechanical anisotropy and results in lower overall strength. These findings provide a theoretical reference for optimizing the layout and targeted support design of pillars in multi-layered stratified ore bodies, such as phosphate mines.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"143 ","pages":"Article 105471"},"PeriodicalIF":5.6,"publicationDate":"2026-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design net cross-section resistances for numerical design analyses of weakened tensile plates with real material properties","authors":"Kirill Golubiatnikov ,&nbsp;Martin Vild ,&nbsp;Frantisek Wald","doi":"10.1016/j.tafmec.2026.105466","DOIUrl":"10.1016/j.tafmec.2026.105466","url":null,"abstract":"<div><div>Design net cross-section resistances for numerical design analyses of weakened tensile plates with real material properties have been established. Datasets of possible resistances for each considered geometry type were generated using a Monte Carlo-based procedure, combining a numerical-analytical approach with statistical functions of real material properties and real thicknesses reported in the literature. The generated datasets and the applied numerical - analytical approach were validated against experimental results. Subsequently, the datasets were statistically evaluated in accordance with EN 1990, and design net cross-section resistances with partial safety factors for tensile resistance were determined. The maximum obtained partial safety factor is 1.22, closely matching the recommended value of 1.23 reported in the literature. The most critical geometry types were smooth double notches, round double notches, and either sharp double notches or a narrow slotted hole. Plates with single holes or slotted holes exhibit lower design resistance than comparable double-notch plates. Additionally, staggered holes reduce resistance, whereas multiple holes in line have little effect. The results provide statistically guaranteed criteria suitable for numerical design analyses with real material properties and support harmonization with Eurocode-based practice.</div><div>The findings of this study, particularly the derived design resistances, form a foundation for establishing design failure criteria for numerical design calculations performed with nominal material properties and nominal geometry in a future study.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"143 ","pages":"Article 105466"},"PeriodicalIF":5.6,"publicationDate":"2026-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Crack propagation mechanisms in rock-like samples with a serrated joint and double fissures under compression-shear loading","authors":"Yuanhao Di ,&nbsp;Yifei Li ,&nbsp;Qiang Liu ,&nbsp;Xianzheng Zhu ,&nbsp;Zhengyang Su ,&nbsp;Shuyang Yu","doi":"10.1016/j.tafmec.2026.105479","DOIUrl":"10.1016/j.tafmec.2026.105479","url":null,"abstract":"<div><div>In natural rock masses, joints and fissures do not exist independently. They are widely distributed in rock structures at multiple scales and in various forms. In practical engineering, the coupled effect of joints and fissures often induces shear sliding of surrounding rock, block instability, or sudden failure. Serious threats are posed to tunnel lining safety, slope stability, and the long-term service performance of underground engineering. To reveal the failure mechanisms of rock masses under the coupling effects of a serrated joint and double fissures, compression-shear tests were conducted on samples containing a serrated joint and double fissures. Crack initiation, propagation, and coalescence processes of sample under different fissure inclination angles and joint inclination angles were systematically investigated. The corresponding energy evolution characteristics and strength responses were also analyzed. During the experiments, digital image correlation (DIC) technology was introduced. Full-field deformation and strain localization characteristics on the surface of sample were monitored in real time. The stress-controlled mechanism of crack evolution was analyzed in combination with distribution characteristics of the maximum principal stress. Results show that the failure process of samples containing a serrated joint and double fissures exhibits distinct staged characteristics. The failure process of the sample is divided into distinct stages based on combined mechanical indicators, including characteristic stress–strain responses, dominant crack evolution modes, and corresponding energy variation trends. Each stage represents a specific damage state governed by different controlling mechanisms, and transitions between stages are associated with identifiable changes in mechanical response and crack activity. The fissure tips are always the preferred locations for crack initiation. The serrated joint significantly affects crack propagation paths by altering local stress concentration patterns. The formation and development of shear cracks are promoted. The increase in crack number mainly provides channels for energy dissipation. The formation and coalescence of shear cracks determine the concentration degree of energy release and the sudden instability of sample. Samples with different geometric configurations show significant differences in stress distribution, crack evolution modes, and failure patterns. The maximum principal stress contours are in good agreement with DIC strain fields in terms of crack initiation locations and coalescence paths. The findings can provide experimental evidence for understanding failure mechanisms of complex fissured rock masses and for stability analysis of underground engineering.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"143 ","pages":"Article 105479"},"PeriodicalIF":5.6,"publicationDate":"2026-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Designing for toughness: How substrate stiffness controls crack path and effective engagement of toughening layers in adhesively bonded CFRP joints","authors":"R. A.A. Lima ,&nbsp;S. Teixeira de Freitas","doi":"10.1016/j.tafmec.2026.105473","DOIUrl":"10.1016/j.tafmec.2026.105473","url":null,"abstract":"<div><div>Tailoring the stacking sequence of composites bonded joints improves fracture toughness and damage tolerance of the joint by encouraging extrinsic toughening mechanisms, such as crack deflection and crack branching. Previous works show that in composite substrates with tailored laminates, each crack deflection into a new ply can increase the joint's toughness. Still, once a 0° layer is reached, toughness drops abruptly due to sudden delamination. To overcome this limitation, this work explores embedding a co-cured film-adhesive layer to prevent delamination in 0° plies. It examines how the substrate's bending stiffness influences the effectiveness of this toughening strategy. Quasi-static double cantilever beam tests on four different carbon fibre reinforced laminates, with and without the co-cured layer, revealed two regimes: (i) compliant substrates lead to high peel stresses, triggered crack deflection into ±45° plies, enabling bridging and rising R-curves—up to 200% toughness increase; (ii) stiffer substrates suppressed near-tip rotation, and promoted cleavage-like crack growth with minimal toughening.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"143 ","pages":"Article 105473"},"PeriodicalIF":5.6,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Failure morphologies in grouted and ungrouted double fissured specimens: experiments and SPH simulations","authors":"Ting Jiang ,&nbsp;Jilin Wang ,&nbsp;Mengyao Shen ,&nbsp;Wenbing Zhang ,&nbsp;Shuyang Yu","doi":"10.1016/j.tafmec.2026.105472","DOIUrl":"10.1016/j.tafmec.2026.105472","url":null,"abstract":"<div><div>To reveal the mechanisms associated with the fracture of grouted and ungrouted double-fissured rock masses, crack propagation of double-fissured rock masses with different dip angles <em>α</em> is studied by combining experiments and numerical simulations. Rock-like samples are produced through sand-based three-dimensional printing technique, and grouted/ungrouted double-fissured models were constructed through cement grouting. Uniaxial compression experimentation and DIC technology are adopted to evaluate the damage modes and stress-strain properties. A modified particle-based model was established by embedding a particle failure treatment method into SPH method, which reproduces the crack evolution process and is validated against experimental results. The research indicates that mechanical responses of specimens are highly consistent with that of natural sandstone, enabling effective simulation of rock mass properties. Modified SPH method is able to precisely capture interface debonding between grout and rock mass as well as the dynamic crack evolution. For ungrouted specimens, with the rise in fracture dipping angle, the crack initiation position shifts from the middle of the fissures to the outer tips, forming “wing cracks”, and the inner tips tend to directly coalesce. After grouting, peak strength significantly enhanced (with the maximum improvement of 126.9% at <em>α</em> = 0°), the concentrated stress effect is diminished, the crack path transitions to passing the grout, the localized tensile stress zone moves from fissure tips to the interior of the grout. The present research offers experimental and numerical fundamentals for elucidating the mechanical response of grouting-reinforced double-fissured rock masses, meanwhile provides important reference value for stability control in rock engineering.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"143 ","pages":"Article 105472"},"PeriodicalIF":5.6,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the mixed mode I/III fracture behavior of autoclaved aerated concrete","authors":"M. Ghadim-Ghobadi ,&nbsp;S. Pirmohammad ,&nbsp;M. Bakhshizadeh","doi":"10.1016/j.tafmec.2026.105476","DOIUrl":"10.1016/j.tafmec.2026.105476","url":null,"abstract":"<div><div>This study examined fracture behavior of Autoclaved Aerated Concrete (AAC) using a newly developed Modified Edge Notched Disc Bend (MENDB) specimen under five distinct loading conditions, including pure mode I, pure mode III, and three mixed-mode I/III states. The traditional ENDB geometry was prone to premature failure in porous materials due to excessive stress concentration at the supports. To overcome this limitation, the MENDB configuration incorporated truncated supports that prevented crushing near contact regions and allowed accurate fracture testing across a wide range of crack orientations. A finite element (FE) parametric study was conducted to quantify the influence of support span ratio (<em>S/R</em> = 0.7–0.9), crack length ratio (<em>a/B</em> = 0.4–0.6), and crack angle (<em>α</em> = 0°–75.5°) on the geometry factors (<em>Y</em>_I, <em>Y</em>_III) and normalized T-stress. The FE results indicated that increasing <em>α</em> progressively shifted the loading condition from pure mode I to pure mode III; meanwhile, larger <em>S/R</em> values enhanced <em>Y</em>_I at low <em>α</em> but reduced it at higher angles, while <em>Y</em>_III consistently increased with <em>S/R</em>. In contrast, increasing <em>a/B</em> raised <em>Y</em>_I at small <em>α</em> but decreased it for dominant mode III conditions. Furthermore, experiments showed that the fracture resitance (<em>K</em>_f) decreased with increasing mode III contribution, with pure mode III <em>K</em>_f being approximately 61% lower than pure mode I one.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"143 ","pages":"Article 105476"},"PeriodicalIF":5.6,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of stress dwell location on the creep–fatigue behavior of notched nickel-based single-crystal superalloy specimens at 900 °C","authors":"Jundong Wang ,&nbsp;Xiaolei Gu ,&nbsp;Xiangqian Xu ,&nbsp;Zhixun Wen ,&nbsp;Zhufeng Yue","doi":"10.1016/j.tafmec.2026.105469","DOIUrl":"10.1016/j.tafmec.2026.105469","url":null,"abstract":"<div><div>Nickel-based single-crystal superalloys are widely employed in critical hot-section components of aero-engines and industrial gas turbines. In this study, high-temperature creep-fatigue interaction tests were conducted on notched specimens of a nickel-based single-crystal superalloy under different stress dwell locations, including baseline cycling without dwell (baseline), dwell at maximum stress (“max dwell”), and dwell at minimum stress (“min dwell”). The results demonstrate that the stress dwell location exerts a pronounced influence on the fatigue life and failure modes of notched specimens. Specifically, under baseline cycling and min dwell conditions, failure is dominated by the initiation and propagation of surface-initiated fatigue cracks. In contrast, under max dwell conditions, the fracture surfaces exhibit a mixed morphology characterized by the coexistence of quasi-cleavage facets and dimpled microvoid coalescence. A damage-coupled viscoplastic constitutive model was employed to simulate the cyclic response of notched specimens under different dwell conditions by finite element analysis, and the predictions indicate that the model can reasonably reproduce the crack initiation and evolution behavior over a range of stress dwell locations. On this basis, the classical Basquin fatigue life model was modified by incorporating stress triaxiality and damage evolution metrics, thereby establishing a life prediction methodology applicable to high-temperature notched creep-fatigue interaction, which captures the observed trends in life degradation with satisfactory accuracy.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"143 ","pages":"Article 105469"},"PeriodicalIF":5.6,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Progressive damage in non-persistent fissured rock masses: Stress-strain analysis of inclination angle effects","authors":"Rui Yue ,&nbsp;Kegang Li ,&nbsp;Qingci Qin ,&nbsp;Mingliang Li ,&nbsp;Dong Tian ,&nbsp;Jianghu Ji ,&nbsp;Shiqian Yan","doi":"10.1016/j.tafmec.2026.105463","DOIUrl":"10.1016/j.tafmec.2026.105463","url":null,"abstract":"<div><div>Split Hopkinson Pressure Bar (SHPB) impact tests are performed to investigate the effect of fissure inclination on the dynamic mechanical properties of rocks. High-speed cameras recorded the complete rock fracture process. Combined with digital image correlation (DIC) and dynamic photoelastic experimentation, this study systematically investigated the dynamic fracture behavior and failure mechanisms of rocks containing non-persistent fissures at varying inclination angles, analyzing from the perspectives of strain fields and stress fields respectively. Experimental results revealed that the dynamic peak strength and energy utilization rate of sandstone with non-persistent fissure show a significant V-shaped change with the increase of fracture dip angle, and the effect of strength weakening and energy utilization efficiency reduction is the most prominent at 45° dip angle. The digital image correlation reveals that the failure mode evolves from shear failure → tensile-shear mixing failure → tensile failure with the increase of inclination angle. Following wing crack initiation, shear mechanisms are activated (with the exception of the 0° inclination case). The primary failure surface developed through the penetration of wing-shaped crack and far-field crack. Dynamic photoelasticity confirms that stress wave transmission-reflection effects at fissure interfaces are the root cause of the observed failure variations. Specifically, the tensile component of incident waves triggers the emergence of wing cracks and far-field cracks, while the shear component of reflected waves drives accelerated crack propagation and deflection. Isochromatic fringes can serve as an effective indicator of stress concentration characteristics, while crack propagation to follow the direction of maximum principal stress and the path of optimal energy release rate. This study establishes a coupled mechanism of fissure geometry characteristics – stress-strain field evolution – energy dissipation - crack propagation - macroscopic failure, providing a crucial theoretical foundation for stability assessment and dynamic hazard prevention in fissured rock masses within geotechnical engineering.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"143 ","pages":"Article 105463"},"PeriodicalIF":5.6,"publicationDate":"2026-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phase-field modelling of mixed-mode fracture and coalescence in fissured rocks","authors":"Sheng Shi ,&nbsp;Yu Zhang ,&nbsp;Fengjin Zhu ,&nbsp;Anxin Meng","doi":"10.1016/j.tafmec.2026.105468","DOIUrl":"10.1016/j.tafmec.2026.105468","url":null,"abstract":"<div><div>The fracture behaviour of quasi-brittle rocks plays a decisive role in the safety and stability of rock mass engineering. The phase-field method offers significant advantages in modelling complex crack propagation. In this study, by introducing a parametric energy degradation function and a geometric crack function, a phase-field damage model is developed to accurately describe the processes of crack initiation, propagation, and coalescence in rocks. In terms of numerical implementation, a staggered iterative algorithm is employed to solve the coupled governing equations of the displacement and phase fields. The model systematically simulates the fracture process of rock specimens containing pre-existing cracks at various inclinations under uniaxial compression, successfully reproducing full-mode fracture behaviours ranging from pure Mode I to pure Mode II, as well as various typical coalescence patterns such as wing cracks and bridge cracks. Furthermore, by analysing the dynamic evolution of the maximum principal stress and the maximum shear stress, the mechanical mechanisms driving crack initiation, propagation, and coalescence under tensile–shear coupled stress fields are elucidated.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"143 ","pages":"Article 105468"},"PeriodicalIF":5.6,"publicationDate":"2026-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on crack propagation law and plastic failure mechanism around extraction borehole","authors":"Yongzan Wen ,&nbsp;Wei Yang ,&nbsp;Mengfei Song ,&nbsp;Tianfu Wang ,&nbsp;Yihan Wang ,&nbsp;Minghua Lin","doi":"10.1016/j.tafmec.2026.105462","DOIUrl":"10.1016/j.tafmec.2026.105462","url":null,"abstract":"<div><div>The evolution of cracks and the formation of plastic failure zones around boreholes constitute crucial seepage channels for efficient gas extraction. To investigate the crack propagation behavior and plastic failure mechanisms surrounding boreholes, cubic coal specimens with various spatial configurations were tested. The surface strain field evolution during uniaxial compression tests was monitored using the Digital Image Correlation (DIC) technique. Combined with elastoplastic mechanics theory, a computational model for the plastic zone boundary around boreholes was established to explore the influencing factors of the plastic region. The results show that circular boreholes, as initial defects, significantly deteriorate the mechanical properties of coal specimens. Both uniaxial compressive strength and elastic modulus decrease markedly with an increasing number of boreholes. The evolution of “butterfly-shaped” strain concentration zones around boreholes dominates crack initiation and propagation, while the superposition of strain fields among multiple boreholes is the primary cause of accelerated degradation of the specimens. Furthermore, the cooperative interaction among multiple boreholes expands the influence range of the plastic zones. Theoretical analysis indicates that under deviatoric stress conditions, a “butterfly-shaped” plastic zone forms around the borehole, with the butterfly lobes oriented at approximately <em>θ</em> ≈ 45°, representing preferential zones for shear crack development. The extent of the plastic zone is positively correlated with the borehole radius and lateral pressure coefficient, but negatively correlated with coal cohesion and internal friction angle. The butterfly-shaped plastic zone around the borehole defines the “effective permeability enhancement zone” for gas extraction. Utilizing the superposition effect of plastic zones induced by multi-borehole disturbance can extend the permeability enhancement range and enlarge the fracture connectivity region, thereby providing a theoretical basis for optimizing the borehole layout in gas drainage operations.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"143 ","pages":"Article 105462"},"PeriodicalIF":5.6,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}