Bulletin of Engineering Geology and the Environment最新文献

{"title":"Slurry leakage mechanism in bed separation grouting and dynamic evolution of bed separation: Insights from field monitoring, physical simulation, and theoretical modeling","authors":"Wang Liu,&nbsp;Fanfei Meng,&nbsp;Yanchao Sun,&nbsp;Yongheng Chen","doi":"10.1007/s10064-026-05319-x","DOIUrl":"10.1007/s10064-026-05319-x","url":null,"abstract":"<div><p>Overburden bed separation grouting is an effective technology for mitigating mining-induced subsidence while promoting the utilization of coal-based solid waste. However, its engineering application is often influenced by slurry leakage resulting from improper determination of the development timing of the target separation. Taking the 8006 working face of a coal mine in Shanxi, China, as a case study, this study investigated the dynamic evolution of overburden separation and the mechanism of slurry leakage through field investigation, distributed optical fiber monitoring, grouting pressure analysis, physical simulation, and theoretical modeling. The results indicate that the target separation did not develop during the early stage of mining, but became significant only after the working face had advanced more than 310 m. The early slurry leakage accident was mainly caused by the absence of effective separation space for slurry storage at the borehole bottom, while excessive grouting pressure drove the slurry to migrate along pre-existing fractures and weak pathways. A prediction method for the dynamic evolution of overburden separation was established based on key stratum theory and the elastic foundation beam method. The predicted separation position and aperture agree well with physical simulation and field monitoring results. After optimizing the grouting timing, no further slurry leakage occurred, and the maximum surface subsidence was reduced from 3485 to 547 mm, corresponding to a subsidence reduction rate of 84.3%. These results provide guidance for optimizing grouting timing and improving subsidence control in bed separation grouting engineering.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 10","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149035111","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":"Mitigation of mud cake adhesion by a humate-based dispersant and its compatibility with slurry performance in slurry shield tunnelling","authors":"Guoping P. Ren,&nbsp;Jian Zhang,&nbsp;Tugen G. Feng,&nbsp;Haibo B. Wang","doi":"10.1007/s10064-026-05315-1","DOIUrl":"10.1007/s10064-026-05315-1","url":null,"abstract":"<div><p>Mud cake adhesion in high-plasticity clay strata can increase cutterhead torque, impair slurry circulation, and cause stoppage-related risks during slurry shield tunnelling. Dispersants can weaken adhesive mud cake, but excessive addition may disturb slurry viscosity, filtration–mud-film formation, and spoil-carrying capacity. Therefore, mud cake treatment should be evaluated together with slurry-performance compatibility. This study investigates a humate-based dispersant (HH) and three commercial dispersants, namely PCE, PAA, and SPP, using high-plasticity clay from the Haitai Yangtze River Tunnel. Slurry viscosity, 30-min filtrate volume, spoil-carrying rate, mud cake turbidity, mass loss, and mud cake–steel adhesion were measured, while SEM, pore structure, ζ-potential, and EDLVO analyses were used to clarify the mechanism. The results show that 0.8%–1.5% HH maintained a reasonable balance among slurry viscosity, filtration–mud-film formation, and spoil-carrying capacity, whereas dosages above 2.0% caused excessive viscosity reduction, increased filtrate volume, and reduced spoil-carrying performance. A dosage of 0.8% HH produced the strongest mud cake disintegration, while 1.5% HH reduced the adhesion force from 254 kPa to 32 kPa, corresponding to an 87.4% reduction. Mechanistic results indicate that HH loosened particle packing, enhanced pore connectivity, shifted the ζ potential from − 13.2 mV to − 52.3 mV, and increased interparticle repulsion. These findings provide a dosage-window basis for mitigating mud cake adhesion in high-plasticity clay strata.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 10","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149034520","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":"Signal reconstruction of microseismic water inrush based on composite multi-scale permutation entropy and complementary ensemble empirical mode decomposition","authors":"Hao Jin,&nbsp;Liping Li,&nbsp;Shuai Cheng,&nbsp;Weihao Song","doi":"10.1007/s10064-026-05318-y","DOIUrl":"10.1007/s10064-026-05318-y","url":null,"abstract":"<div><p>Microseismic signals associated with tunnel water inrush are frequently obscured by construction disturbances and equipment noise, hindering waveform recognition and time–frequency analysis. This study proposes a denoising and reconstruction method combining composite multiscale permutation entropy and complementary ensemble empirical mode decomposition (CMPE–CEEMD). Construction noise generated by blasting, rock bolting and shotcreting, and rock drilling was recorded through field monitoring, while water-inrush-related microseismic signals were obtained from a physical model test. The noisy signals were adaptively decomposed into intrinsic mode functions using CEEMD, after which CMPE was employed to identify noise-dominated components and reconstruct the effective signals. The dominant frequencies of typical construction noise were mainly distributed between 50 and 225 Hz, whereas the effective high-frequency components of the water-inrush-related microseismic signals were concentrated within 700–1,750 Hz. For the representative signal analyzed, a CMPE threshold of 0.7 effectively suppressed hydraulic-pump noise at approximately 100 Hz while preserving the principal high-frequency microseismic responses. Compared with CMPE–EMD, CMPE–CEEMD increased the signal-to-noise ratio from 10.19 to 12.58 dB and reduced the root mean square error from 0.0132 to 0.0121, corresponding to an improvement of 2.39 dB and a reduction of 8.33%, respectively. These results demonstrate that the proposed method alleviates mode mixing, suppresses low-frequency noise, and preserves diagnostically relevant microseismic features, thereby providing higher-quality data for first-arrival picking and microseismic source localization.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 10","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149034762","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":"Asymmetric creep behavior and a mechanism of longitudinal crack development in cold-region subgrades under the sunny-shady slope effect","authors":"Yang Du,&nbsp;Tangdai Xia,&nbsp;Giuseppe Lacidogna","doi":"10.1007/s10064-026-05307-1","DOIUrl":"10.1007/s10064-026-05307-1","url":null,"abstract":"<div><p>Longitudinal cracking is a common form of distress that compromises the performance of frozen ground subgrades. Persistent thermal asymmetry between the sunny and shady sides of a subgrade contributes to differential deformation, but the coupling among temperature evolution, ice-water phase change, and creep remains unclear. This study investigates the mechanism using paired unconfined creep tests on silty clay specimens subjected to contrasting initial temperatures and thawing conditions. Constant axial stresses of 30, 60, and 90 kPa are applied. Nuclear magnetic resonance (NMR) quantifies unfrozen water and estimates ice content, while digital image correlation (DIC) records strain localization on the monitored specimen surfaces. The results show that asymmetric thawing produces creep lag between the two specimens. The thawing response of initially frozen specimens comprises instantaneous deformation, initial decelerating creep, accelerated creep induced by phase change, second decelerating creep, and final steady-state creep. The phase change softening point (PCSP) and peak creep rate point (PCRP) mark the onset of accelerated creep and its transition to second decelerating creep, respectively. A lower initial temperature on the shady side prolongs ice-water phase change, delays both characteristic points, and increases the accumulated strain difference. This increase results from delayed pore ice melting on the shady side, which preserves ice cementation and restrains deformation for longer. At 30 and 60 kPa, the response retains five stages, whereas at 90 kPa progressive localization leads to instability. These findings provide a mechanistic basis at the specimen scale for interpreting differential deformation and longitudinal cracking under thermal asymmetry.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 10","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149034826","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":"Bayesian multi-task Gaussian process regression for cross-type landslide runout prediction under data imbalance","authors":"Chao Song,&nbsp;Yuxin Yang,&nbsp;Ling Xu,&nbsp;Rendi Wu","doi":"10.1007/s10064-026-05316-0","DOIUrl":"10.1007/s10064-026-05316-0","url":null,"abstract":"<div><p>Irrigation-induced landslides are widespread across the Loess Plateau and pose serious threats to infrastructure and public safety, making accurate prediction of runout distance essential for hazard assessment. However, empirical formulae and physically based numerical models often rely on oversimplified mechanics, strong parameter assumptions, limited transferability, or high computational cost. In addition, conventional machine learning models generally ignore correlations among landslide types and provide limited uncertainty quantification under small-sample conditions. To address these limitations, this study proposes a Bayesian multi-task Gaussian process regression framework (B-MTGPR) coupled with the No-U-Turn Sampler (NUTS) for predicting loess landslide runout distance. By constructing a joint covariance function that couples input and task kernels, the model transfers information from data-rich shallow loess landslides to data-scarce loess-bedrock landslides within the same study area. NUTS is used to sample the posterior distribution of model hyperparameters, thereby propagating hyperparameter uncertainty into the posterior predictive distribution. The framework is evaluated using 53 shallow loess landslides and 22 loess-bedrock landslides from Heifangtai. Results show that B-MTGPR markedly improves prediction for loess-bedrock landslides, increasing the test <i>R</i>² from 0.66 to 0.98 and substantially reducing MAE, while maintaining 95% interval coverage close to the nominal level. Overall, the proposed framework provides a practical approach for runout estimation under data scarcity within the current dataset, although broader multi-site validation is still needed.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 10","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149034763","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":"Fracture network construction and damage dependent strength of coal samples based on CT scanning","authors":"Xin Chen,&nbsp;Yang Wang,&nbsp;Jing Cui,&nbsp;Yu Fu","doi":"10.1007/s10064-026-05314-2","DOIUrl":"10.1007/s10064-026-05314-2","url":null,"abstract":"<div><p>The fracture network may significantly influence the stability and fluid flow of a coal rock mass. This study presents a novel approach for constructing fracture network and investigating damage-dependent strength for coal samples based on CT scanning techniques. To study the original fracture networks and their evolution, X-ray micro-CT scanning tests were conducted for the coal samples before and after triaxial compression tests. Fracture traces were identified from grayscale CT images through use of various image analysis software and self-written programs in combination, and a method was developed to construct polygonal and circular fractures from these traces. With the constructed fractures, distribution of the fracture network, damage evolution and damage dependent strength were investigated. It was observed that both the radius and aspect ratio of fractures in the coal samples follow log-normal distributions. Furthermore, it was found that both the increment of fracture volumetric fraction ratio and that of the two invariants of Oda’s fabric tensor decrease first and then increase with confining pressure. The linear relationship between the two invariants of effective stress suggests that the dependence of coal mass strength on Oda’s fabric tensor can be predicted very well by Yang’s anisotropic yield criterion for damaged materials.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 10","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149034761","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":"Assessment of the stability of the Bonifacio cliff using 3D geomechanical modelling","authors":"Alain Thoraval,&nbsp;Stella Coccia,&nbsp;Christian Franck,&nbsp;Baptiste Vignerot","doi":"10.1007/s10064-026-05313-3","DOIUrl":"10.1007/s10064-026-05313-3","url":null,"abstract":"<div><p>The vertical rock cliff bordering the Upper Town of Bonifacio (Southern Corsica, France) is susceptible to large-scale instability, primarily due to the fracturing of the rock mass and the presence of a geological layer susceptible to erosion at the base of the cliff. Since 2018, this cliff has been the focus of several studies to improve understanding of rock hazards in the Bonifacio Citadel area and developing risk management scenarios to be implemented. This article presents the contribution of 3D geomechanical modeling to the assessment of cliff stability. These models enabled the characterization of large-scale instabilities based on different scenarios, considering uncertainties relating to the location and the extent of existing fractures. The impact of the cliff undercutting extension (due to maritime erosion) was also assessed. The movement evolution was analysed at the sensor locations installed in the modelled area. The analysis of these sensors positioning (constrained by urbanization at the time of installation) aims to ultimately optimize the site monitoring.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 10","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986597","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":"An efficient approach for rapid simulation of landslide dam breach flood processes considering wide gradation characteristics","authors":"Chenguang Song","doi":"10.1007/s10064-026-05297-0","DOIUrl":"10.1007/s10064-026-05297-0","url":null,"abstract":"<div><p>Accurately simulating landslide dam breach flood processes is a critical strategic need for global disaster prevention and mitigation. However, many existing models neglect the wide gradation characteristics inherent in natural landslide dam materials, compromising calculation accuracy. This study derives the critical incipient flow velocity accounting for material gradation, calculates the critical water depth over the dam crest particles at initiation, and determines the wide-gradation critical shear stress. These components are integrated into the DB-IWHR dam breach flood model, resulting in a novel landslide dam breach model that incorporates wide gradation effects. Validation using the two-stage Baige landslide dam failure demonstrates good agreement between calculated and measured breach discharge hydrographs and dammed lake water level variations. The relative error of primary variables does not exceed 15%, indicating robust overall model performance. The coefficient of uniformity of the dam material emerges as the key input parameter governing landslide dam breach simulation accuracy.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 10","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986182","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 landslide probability changes under climate change scenarios as a basis for adaptation strategies","authors":"Fang-Yi Chu,&nbsp;Chi-Wen Chen,&nbsp;Hsin-Chi Li","doi":"10.1007/s10064-026-05309-z","DOIUrl":"10.1007/s10064-026-05309-z","url":null,"abstract":"<div><p>Landslides are among the deadliest global disasters, with Taiwan facing frequent slope hazards due to its fragile geology and steep terrain. As climate change intensifies, stronger typhoons are expected to increase the risk of slope disasters. This study aims to simulate the landslide susceptibility of the Dahan River watershed in Taiwan under future climate scenarios and to develop impact maps to support stakeholder communication and climate adaptation planning. A total of 335 typhoon events, 166 from the base period and 169 projected for the end of the 21st century, were simulated using climate change projection rainfall data and the Transient Rainfall Infiltration and Grid-Based Regional Slope-Stability Model (TRIGRS). Results show that the maximum landslide probability increases from 14.0% to 22.4%, with higher risks concentrated in upstream areas. Based on interviews with disaster management agencies, the Xiuluan settlement was selected as a pilot site for applying the impact maps. These maps helped stakeholders understand future landslide impacts, enabling discussion and planning of adaptation strategies. The study demonstrates the value of multi-event simulation and impact mapping in climate change adaptation for slope hazards.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 10","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986423","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":"Land subsidence and infrastructure failure risk assessment in karst and collapsible soils for climate-resilient infrastructure","authors":"Kelechi Nnaji Eze,&nbsp;Olaide Temilade Bada,&nbsp;Benjamin Ogemidi Anyaehie,&nbsp;Adamu Abdulmumini,&nbsp;Ewemade Enabulele,&nbsp;Yasir Ahmed","doi":"10.1007/s10064-026-05311-5","DOIUrl":"10.1007/s10064-026-05311-5","url":null,"abstract":"<div><p>Land subsidence in karst, evaporite, subrosion and collapsible-soil terrains poses a persistent threat to foundations, transport corridors, utilities, dams, tunnels and other public infrastructure. This review examines how subsidence mechanisms are translated into infrastructure performance evidence and risk-informed engineering decisions. A PRISMA-ScR-aligned search of Scopus, Web of Science, Engineering Village/Compendex and GeoRef, supported by backward and forward citation checking, identified 459 records. After duplicate removal, title and abstract screening, and full-text eligibility assessment, 25 peer-reviewed empirical studies published between 2015 and 2025 were included. Eligible studies had to link ground deformation to geotechnical, hydrogeological or geophysical evidence and to at least one asset-relevant outcome, including foundation distress, serviceability loss, corridor disruption, susceptibility zoning, mitigation performance or monitoring indicators. The evidence shows two dominant mechanism groups. In carbonate and evaporite karst, dissolution, suffosion, cover subsidence, cover collapse, leakage, groundwater fluctuation and construction disturbance are associated with sinkhole development, differential settlement and localised infrastructure disruption. In collapsible loess and high-fill systems, wetting, suction loss, creep and fill compressibility are associated with progressive settlement and serviceability deterioration. The most reliable interpretations are obtained where geophysical anomalies are checked against boreholes, trenching, groundwater records, laboratory testing or deformation monitoring. However, the evidence remains uneven across regions, ground types and asset classes. Quantitative performance thresholds, lifecycle cost evidence, climate-stressor testing and post-treatment verification are still limited. The review provides an engineering-geology synthesis of mechanism-to-asset evidence rather than a comprehensive global risk assessment.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 10","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148927713","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}