Bulletin of Engineering Geology and the Environment最新文献

{"title":"Correction to: Influence of anchorage angle on rock mass mechanical response and slip damage under cyclic dynamic loading","authors":"Chi Zhang, Zhiqiang Yin, Chao Qi, Ruxiang Qin, Xinsheng Zhang, Kun Cao","doi":"10.1007/s10064-026-05243-0","DOIUrl":"10.1007/s10064-026-05243-0","url":null,"abstract":"","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783323","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":"Cracking and healing behavior of earthen plaster under wetting-drying cycles","authors":"Quanquan Jia,&nbsp;Yue Wang,&nbsp;Wenwu Chen,&nbsp;Eng-Choon Leong,&nbsp;Zongren Yu","doi":"10.1007/s10064-026-05278-3","DOIUrl":"10.1007/s10064-026-05278-3","url":null,"abstract":"<div><p>Due to arid climate and short-duration intense rainfall in summer, vast number of earthen cultural heritage structures in northwestern China are often subjected to wetting-drying (W-D) cycles. Earthen plaster, primarily made of clay mixed with additives (sands, fibers), are often used as the external skin of many historical buildings. These earthen plasters frequently develop numerous cracks under W-D cycles, which is detrimental to cultural heritage conservation. To clarify the influence of W-D cycles on crack development in earthen plaster, this study investigated the effects of plaster material composition (coarse particles, two types of fibers, and three types of binders) and three W-D cycles on the formation and development of cracks through W-D cycles test and crack image analysis. The results show that crack development in earthen plasters is influenced by both material composition and the number of W-D cycles. The addition of fibers (wheat straw and hemp fiber) effectively inhibits crack formation and promotes crack healing during wetting. Although the initial crack width is larger after adding natural hydraulic lime to earthen plaster, it still reduces the crack ratio of the plaster and gives it better resistance to W-D cycles. These findings hold significant implications for material selection in earthen plaster and conservation strategies in the restoration of earthen plasters in cultural heritage structures, particularly in regions subjected to extreme conditions and intense W-D cycling.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783362","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":"Assessing and utilizing hydrothermal geothermal resources in a deep mine: a case study of Pingdingshan coalfield, China","authors":"Zheng Zhen,&nbsp;Kun Yu,&nbsp;Zhijun Wan,&nbsp;Yiwen Ju,&nbsp;Zhenzi Yu,&nbsp;Liangliang Jiang,&nbsp;Zhuting Wang,&nbsp;Bo Zhang,&nbsp;Zhehan Sun,&nbsp;Peng Shi","doi":"10.1007/s10064-026-05260-z","DOIUrl":"10.1007/s10064-026-05260-z","url":null,"abstract":"<div><p>Efficient utilization of mine geothermal energy is an important pathway for the green development of coal mines and the clean energy transition of mining areas. In this study, the heat-accumulation mechanism and development potential of hydrothermal geothermal resources in the Pingdingshan No. 8 mine were investigated using hydrogeochemical, isotopic, borehole-temperature, and numerical-simulation data. A geothermal well-cluster development model was proposed. The results show that the Cambrian limestone geothermal water is mainly characterized by Na-Ca-HCO₃-SO₄ and Na-HCO₃-SO₄ hydrochemical types, with an average reservoir temperature of 70.43 ℃. Isotopic data indicate that meteoric water, especially rainfall during wet periods, is the primary recharge source. The average geothermal heat flow is 70.99 mW/m², and the average borehole-derived geothermal gradient is 33.6 ℃/km. Geothermal accumulation is mainly controlled by high thermal conductivity in uplifted structural zones, compound fold structures, and convective heat transfer along deep-seated faults. The base-case recoverable geothermal resource is estimated to be 5.47 × 10¹⁷J, which can support heating for approximately 100,000 m² of building area for 62.5 years under the simulated 200 m³/h pumping–recharge scenario. Compared with the single-well case, the well-cluster system delayed thermal breakthrough by 23 years under the specific simulated conditions. Replacing coal-fired heating with geothermal utilization can reduce CO₂ emissions by approximately 9,970 t annually. This study provides a scalable mine geothermal utilization framework for supporting low-carbon energy transition in mining areas.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783364","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":"Comparative analysis of grout take distributions before and during reservoir impoundment with emphasis on engineering geological parameters (An experience of Seymareh Dam; Iran)","authors":"Ali M. Rajabi,&nbsp;Kh. Solgi,&nbsp;A. Cheshomi","doi":"10.1007/s10064-026-05262-x","DOIUrl":"10.1007/s10064-026-05262-x","url":null,"abstract":"<div><p>The typical practice in dam construction is to complete the grout curtain before reservoir impoundment; however, in some cases, grouting may continue during or after impoundment. This study compares the statistical distribution of grout takes before and during reservoir impoundment at the Seymareh Dam using two geologically comparable grout curtain galleries (GL3 and GL4). These galleries were selected because they intersect similar lithological units of the middle and lower Asmari Formation and exhibit comparable structural characteristics, while differing primarily in the hydraulic conditions prevailing during grouting. Approximately 175,000 m of grout curtain records from the 180-m-high Seymareh Dam were analyzed using Ewert's (2008) unpublished methodology. Unlike previous studies that focused exclusively on pre-impoundment conditions, this research provides a systematic field-scale comparison between grouting performed before and during reservoir impoundment, enabling the identification of grout washout mechanisms in large dam foundations. Our analysis reveals significant differences in grout-take distributions between the two hydraulic conditions. Grout take increased by up to five times in boreholes affected by reservoir impoundment, indicating a strong hydraulic control on grout consumption under rising reservoir head conditions. Under normal hydraulic conditions, the observed grout-take distributions agree well with Ewert's conceptual patterns for wide and extended joints (Type b), fissure-karst conditions (Type c), and small joints with incidental cavities (Type e), reflecting the engineering geological conditions encountered at the Seymareh Dam site. In contrast, grout-take distributions obtained during reservoir impoundment deviate systematically from these expected patterns because of the additional influence of transient hydraulic loading. These results indicate that hydraulic loading acts as an additional controlling factor superimposed on geological conditions, a factor that is not explicitly incorporated into existing classification frameworks. These findings introduce a practical criterion for detecting grout washout based on deviations from Ewert's statistical distribution patterns. Rather than replacing Ewert's conceptual framework, the present study extends its practical applicability by demonstrating its limitations under transient hydraulic loading during reservoir impoundment. The results further indicate that, in addition to geological conditions, reservoir impoundment and grouting sequence significantly influence grout-take distributions.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783322","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":"Internal erosion and post-erosion stress-strain behavior of internally unstable soil under fluctuating hydraulic loading","authors":"Gang Wang,&nbsp;Mingke Liao,&nbsp;Weibo Wang,&nbsp;Zezhi Deng,&nbsp;Liangjun Deng,&nbsp;Wei Jin","doi":"10.1007/s10064-026-05257-8","DOIUrl":"10.1007/s10064-026-05257-8","url":null,"abstract":"<div><p>Internally unstable soils, consisting of coarse and fine particles where the coarse skeleton fails to retain fines, are highly prone to internal erosion under seepage. Such erosion degrades both hydraulic and mechanical properties, threatening the long-term stability of natural and engineered soil structures. In practical situations, soils are frequently subjected to fluctuating hydraulic conditions. To investigate the effects of hydraulic fluctuations on internal erosion and post-erosion stress-strain behavior, an improved triaxial erosion apparatus was employed to conduct internal erosion and post-erosion triaxial compression tests under different controlled hydraulic loading patterns. Test results demonstrated that hydraulic gradient fluctuations significantly exacerbate internal erosion, with increased fine particle loss under higher fluctuation amplitudes and frequencies. It was found that the variations in hydraulic conductivity and volume deformation induced by fine particle loss can be correlated with the fines eroded ratio and confining pressure, independent of the specific hydraulic loading paths and patterns. Substantial alterations in post-erosion stress-strain behavior were observed, with the shear dilatancy and peak friction angle decreasing with increasing fines eroded ratio. The reduction in the peak friction angle can also be well related to the fines eroded ratio. These findings improved the understanding of erosion-induced deformation in internally unstable soils under fluctuating hydraulic gradients.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783119","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":"Correction to: Landslide susceptibility mapping based on InSAR coherence rainfall components and deep learning: a case study of Lanping county in Southwest China","authors":"Yongfa Li,&nbsp;Zhuopei Ruan,&nbsp;Xiaoqing Zuo,&nbsp;Xiaona Gu,&nbsp;Yujuan Dong,&nbsp;Yongning Li,&nbsp;Chao Shi,&nbsp;Cheng Huang,&nbsp;Wenbin Xie,&nbsp;Qinheng Zou,&nbsp;Jingsong Xiao","doi":"10.1007/s10064-026-05238-x","DOIUrl":"10.1007/s10064-026-05238-x","url":null,"abstract":"","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783046","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 bedding plane strength on mechanical behaviors of synthetic layered rock and implications for longwall gas well protection","authors":"Qingwen Shi,&nbsp;Brijes Mishra,&nbsp;Yun Zhao,&nbsp;Guoli Ding,&nbsp;Changdi He,&nbsp;Zhenhua Ouyang,&nbsp;Shuaifeng Yin,&nbsp;Xin Yu,&nbsp;Xiang Ma,&nbsp;Debing Zhang,&nbsp;Zhengjun Guo,&nbsp;Jiayang Wang","doi":"10.1007/s10064-026-05241-2","DOIUrl":"10.1007/s10064-026-05241-2","url":null,"abstract":"<div><p>To assess the damage to gas wells penetrating longwall mining seams, understanding the shear behavior of layered strata in relation to bedding plane parameters is essential. This study examines the effect of bedding-plane cohesive strength (<span>(C_p)</span>) on the mechanical behavior of synthetic layered rocks (SLR). The <span>(C_p)</span> values were determined through direct shear tests, while the mechanical representativeness of the SLR specimens was previously verified against natural shale using Brazilian splitting tests. A series of biaxial and triaxial tests show that biaxial compressive strength and modulus increase with <span>(C_p)</span>, and confining stress (<span>(sigma _3)</span>) reduces this effect. At low <span>(C_p)</span>, separation and spalling are the primary failure modes, while shear failure dominates at higher <span>(C_p)</span>. The failure plane deviates from being parallel to bedding planes as <span>(C_p)</span> increases. A modified Jaeger’s Plane of Weakness model, incorporating the effects of asperity ratio (<span>(g_lambda)</span>), <span>(C_p)</span>, and <span>(sigma _3)</span>, is proposed. Field observations suggest that shallow gas wells with low <span>(C_p)</span> are prone to shear failure, while deeper wells tend to fail by compression. Near longwall panels, lower <span>(C_p)</span>, reduced vertical load, increased horizontal stress relief, and stiffness ratio between adjacent strata negatively impact well stability. By integrating <span>(C_p)</span> into the stability evaluation framework, the present research provides a more comprehensive method for assessing gas well integrity under complex geological and operational conditions.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783047","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":"Real-time prediction of the natural decline rate of groundwater inflow from a fault zone or fractures during tunnel excavation and application to deciding on whether to implement grouting","authors":"Hiroaki Murakami,&nbsp;Eiichi Ishii,&nbsp;Keisuke Yagi","doi":"10.1007/s10064-026-05253-y","DOIUrl":"10.1007/s10064-026-05253-y","url":null,"abstract":"<div><p>Real-time prediction of the natural decline rate of groundwater inflow during tunnel excavation in faulted or fractured rock is crucial for deciding on whether to implement grouting. In this study, two pilot boreholes were drilled at the Horonobe Underground Research Laboratory, Japan, prior to the excavation of tunnels at depths of 350 and 500 m in faulted siliceous mudstone, and inflow from a fault zone (or fractures) in each borehole was analyzed using log–log plots of inflow rate versus elapsed time based on the hydraulic diffusion equation. The plots for both boreholes are characterized by a power law relationship. The plot for the tunnel at 500 m depth shows a steep slope indicating a rapid reduction in inflow. Accordingly, this tunnel was successfully excavated without pre-grouting. The results show that a log–log plot of inflow rate versus elapsed time, as obtained from a fault zone or fractures in a pilot borehole, can be used to rapidly predict the natural decline rate of inflow and determine whether grouting is needed for tunnel excavation.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10064-026-05253-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-objective borehole layout optimization method for seabed sites considering formation dip angle bayesian updating","authors":"Yan Zhang,&nbsp;Zhengyang Zhang,&nbsp;Yuxuan Tang,&nbsp;Guanlan Xu,&nbsp;Fengqian Pan,&nbsp;Kai Zhao","doi":"10.1007/s10064-026-05259-6","DOIUrl":"10.1007/s10064-026-05259-6","url":null,"abstract":"<div><p>To address the difficult problem of insufficient borehole data in submarine site investigations leading to challenges in formation dip estimation, as well as the issue that traditional borehole layout optimization struggles to balance multi-parameter considerations and computational efficiency, this study proposes a multi-objective optimization method for submarine site borehole layout integrated with Bayesian dynamic updating of formation dip angles, providing a novel solution framework for such problems. Based on the embedded Markov chain for stochastic formation modeling, the research resamples formation dip angles via the bootstrap method and constructs a weighted prior probability density function; combined with Bayesian inference, dynamic updating of formation dip angles is realized within the borehole layout design process. Meanwhile, a multi-objective optimization function is formulated to organically integrate core factors including formation structure uncertainty, borehole positions, spacing, depth, and quantity, thereby achieving balanced coordination and synchronous optimization of multiple parameters. The effectiveness of the proposed method is verified through a case study of submarine borehole layout optimization, by comparing the variation in formation uncertainty before and after optimization.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783121","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":"Systematic evaluation of soil relative density effects on buried pipeline response to reverse-faulting: Evidence from physical model tests","authors":"Rohan Deb,&nbsp;Bithin Ghorai,&nbsp;Subhadeep Banerjee","doi":"10.1007/s10064-026-05250-1","DOIUrl":"10.1007/s10064-026-05250-1","url":null,"abstract":"<div><p>Buried continuous pipelines traversing through seismically active regions are highly vulnerable to Permanent Ground Deformations (PGD), particularly the compressive and uplift forces induced by reverse-faulting. While previous research has extensively characterised the effects of fault geometry and pipeline orientation, the influence of the backfill soil’s physical state on pipeline mechanical response remains under-investigated. This study presents an experimental investigation into the soil-structure interaction of buried pipelines subjected to reverse fault rupture with a 60° dip angle. A series of 1 g split-box tests was conducted to evaluate the effects of soil relative density (<i>D</i>_<i>r</i>), pipeline burial depth and the pipeline flexural rigidity. Model pipelines fabricated from aluminium and brass alloys were utilised in the current study to simulate a range of stiffness characteristics under varying backfill conditions (loose and dense sand). The experimental results demonstrate that the soil relative density is a governing factor in the development of pipeline strain. It is observed that pipelines buried in dense sand exhibit higher bending strains compared to those placed in loose sand backfill. Furthermore, increased pipeline burial depth was found to amplify pipeline strain development by transferring more load to the pipelines. These findings underscore the need to account for backfill compaction states in seismic design and suggest that the use of loose granular backfill may be a potential mitigation strategy to help minimise the risk of pipeline failure in active fault-crossing zones.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783123","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}