Bulletin of Engineering Geology and the Environment最新文献_第8页

A solution for evaluating stability and sliding direction of 3D earthquake landslides 评估三维地震滑坡稳定性和滑动方向的解决方案

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2024-10-04 DOI: 10.1007/s10064-024-03926-0

Jiaping Sun, Chao Liang

{"title":"A solution for evaluating stability and sliding direction of 3D earthquake landslides","authors":"Jiaping Sun, Chao Liang","doi":"10.1007/s10064-024-03926-0","DOIUrl":"10.1007/s10064-024-03926-0","url":null,"abstract":"<div><p>Assessing the stability and the determining the critical slip surfaces (CSS) represent two significant endeavors concerning 3D seismic landslides. The minimum potential energy method is applied to evaluate the stability, with specific improvements proposed. Specially, the mobilized shear stress on slip surface is derived through the static equilibrium condition on <i>x</i>-axis direction of the sliding mass. The movement trajectory of a landslide (moving direction) is jointly determined by the forces acting on the sliding mass and is equivalent to the vector sum of these forces. Seismic acceleration is characterized using the pseudo-dynamic method, capturing the temporal and spatial variations in seismic forces. By considering the total potential energy of landslide as the objective function, a novel insight for identifying CSS of seismic-induced landslides is developed. A comparison and analysis show that the relative errors between the safety factor(SF) obtained using the proposed method and limit equilibrium method are less than 3%. Results also indicate that the proposed model can effectively determine the location and shape of CSS against 3D seismic landslides. A real case study shows that the proposed method not only accurately evaluates the stability and location of the slip surface of an actual slope but also yields spatial characteristic parameters of the sliding mass that are close to the measured values. Finally, a sensitivity analysis is conducted on several parameters affecting the stability of seismic-induced landslide.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"83 11","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142409871","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}

引用次数: 0

Development and kinematics of the river-damming Cuoduoqin rockslide in the high Three River Region, southeastern Tibetan Plateau 青藏高原东南部高三江地区筑坝拦河的措多钦岩崩的发展和运动学特征

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2024-10-04 DOI: 10.1007/s10064-024-03925-1

Zunhong Ke, Fuchu Dai, Siyuan Zhao

{"title":"Development and kinematics of the river-damming Cuoduoqin rockslide in the high Three River Region, southeastern Tibetan Plateau","authors":"Zunhong Ke, Fuchu Dai, Siyuan Zhao","doi":"10.1007/s10064-024-03925-1","DOIUrl":"10.1007/s10064-024-03925-1","url":null,"abstract":"<div><p>Landslides resulting in complete river blockage have frequently occurred in the Three River Region (TRR) during the geomorphological evolution of the Tibetan Plateau. River-damming landslides occurring in low-relief regions of the TRR have received less attention compared to those in deeply-incised valleys. The 2.5 Mm<sup>3</sup> Cuoduoqin rockslide originated from the south-facing hillslope of a southeast-east-trending ridge, leading to complete blockage of the Quzhaqu River. The original failure mainly involves blocky metamorphic limestone and phyllite. The Quzha Lake Fault providing rear rupture and two other groups of joints facilitating sidewise and toe releases are considered predisposing factors contributing to slope instability. Ongoing tectonic uplift and cyclic glaciations are considered preparatory factors, shifting the slope from stable to marginally unstable. A prehistoric earthquake, likely corresponding to an ancient rupture event on the active Nujiang Fault Zone (NJFZ), is deemed as the most probable trigger for this large rock slope failure. The 2D discrete element method (DEM) software UDEC is utilized to analyze the static slope stability and to reproduce the kinematic process of the rockslide. The static analysis indicates that the original rock slope was in equilibrium under natural conditions. The kinematic process can be divided into three phases: initial detachment within seconds after applying seismic load, downslope acceleration after crossing the slope knickpoint, and accumulation after traveling into the valley bottom. This case study, focusing on the development and kinematics of the Cuoduoqin rockslide, can help enhance the understanding of effective risk assessments of landslides in high-altitude and low-relief regions.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"83 11","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142409831","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}

引用次数: 0

Debris flow in indian himalaya: A threat to emerging infrastructure 印度喜马拉雅山的泥石流：对新兴基础设施的威胁

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2024-10-04 DOI: 10.1007/s10064-024-03923-3

Neha Chauhan, Vipin Kumar, Yaspal Sundriyal, Sameeksha Kaushik, Srikrishnan Siva Subramanian, Raquel Melo, Naresh Rana

{"title":"Debris flow in indian himalaya: A threat to emerging infrastructure","authors":"Neha Chauhan, Vipin Kumar, Yaspal Sundriyal, Sameeksha Kaushik, Srikrishnan Siva Subramanian, Raquel Melo, Naresh Rana","doi":"10.1007/s10064-024-03923-3","DOIUrl":"10.1007/s10064-024-03923-3","url":null,"abstract":"<div><p>The present study aimed to understand the debris flow characteristics in view of frequent extreme rainfall events, expansion of road networks, tourist influx, and population pressure in the NW & Central Himalaya. Notably, majority of the human settlements, roads, bridges, buildings, and even protection measures in the NW & Central Himalaya do not take into consideration such debris flow impact scenario despite a history of debris flow disasters. The Voellmy-Salm rheology dependent dynamic runout simulation method was used to determine the debris flow pressure and velocity regime in 9 debris flow locations belonging to different litho-tectonic conditions. Results revealed that the debris flow pressure and velocity in these 9 studied debris flows might reach up to 3000 kPa and 20 m/s, respectively. The debris flow pressure and velocity of these orders have the potential to damage the protection measures and infrastructures, which have also been observed in other hilly terrains. The sensitivity analysis was carried out at a range of input parameters by considering 729 possible simulations and debris flow pressure and velocity are found to follow relatively better corelation until ~ 250 kPa flow pressure and ~ 15 m/s velocity thresholds. The influence of slope topography on the debris flow characteristics is also observed in the form of amplification of flow pressure and velocity at concave portions. The rapid development of road network in the NW & Central Himalayan region and its subjectivity to potential debris flow risk is also discussed.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"83 11","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142409828","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}

引用次数: 0

Rate and negative Poisson’s ratio effects on Compressive Mechanical behaviors of Thermal-Damaged Crystalline Rocks using a grain-based model 利用基于晶粒的模型研究热损伤结晶岩的压缩力学行为的速率和负泊松比效应

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2024-10-03 DOI: 10.1007/s10064-024-03905-5

Ling Xu, Bibo Wang, Xiaolin Huang, Jiahu Du

{"title":"Rate and negative Poisson’s ratio effects on Compressive Mechanical behaviors of Thermal-Damaged Crystalline Rocks using a grain-based model","authors":"Ling Xu, Bibo Wang, Xiaolin Huang, Jiahu Du","doi":"10.1007/s10064-024-03905-5","DOIUrl":"10.1007/s10064-024-03905-5","url":null,"abstract":"<div><p>Rocks often have a rate effect on mechanical behaviors and exhibit a negative Poisson’s ratio (NPR) effect after being thermally damaged. However, to date, their combined role in mechanical behaviors has not been clarified. This study micromechanically explores the rate and NPR effects on the compressive behaviors of thermal-damaged rocks using the compression-hardening grain-based model (CHGBM) implemented by the Universal Discrete Element Code (UDEC). The original, moderately, and highly thermal-damaged Suizhou granite samples were subjected to unconfined compression tests for calibrating UDEC-CHGBM. With developing thermal damage from the original state, the rock sample decreases in the peak stress and modulus, exhibiting a transition of pre-peak stress-stain relation from the approximately linear to nonlinear, and a transition of Poisson’s ratio from the positive (lateral extension) to negative (lateral contraction). Our UDEC-CHGBM reproduced these experimental phenomena with reasonable accuracy. With increasing strain rates, the peak stress and modulus increase in a power law manner. The dynamic increase factors of the peak stress and modulus also increase with enhancing thermal-damaged degrees. Due to the thermal damage, the grain contact increased in the maximum allowable closure, thus enhancing compression-hardening capacity and nonlinear characteristics, resulting in a promotion of the rate effect. Lateral contraction deformation can reduce the proportion and magnitude of the tensile stress within the sample, and inhibit intergranular microcracking. The NPR effect depends on both the degree of thermal damage and strain rate. We shed light on the synergistic effects of the rate and NPR on macro- to micromechanical behaviors of thermal-damaged rocks.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"83 11","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142409658","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}

引用次数: 0

Numerical analysis of borehole parameters effects on strength weakening of red sandstone 钻孔参数对红砂岩强度削弱影响的数值分析

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2024-10-02 DOI: 10.1007/s10064-024-03919-z

Longxiang Li, Wenbing Guo, Gaobo Zhao, Changdi He, Weiqiang Yang

{"title":"Numerical analysis of borehole parameters effects on strength weakening of red sandstone","authors":"Longxiang Li, Wenbing Guo, Gaobo Zhao, Changdi He, Weiqiang Yang","doi":"10.1007/s10064-024-03919-z","DOIUrl":"10.1007/s10064-024-03919-z","url":null,"abstract":"<div><p>In addition to the high stress, hard rocks around deep mine entries are also subject to the disturbed stress by mining activities nearby, which increases the risk of rockburst incidents. One preventative measure is the employment of drilling pressure relief (DPR) on hard rocks. This paper analyzes the borehole parameters effects on strength weakening of red sandstone through numerical simulation based on the finite difference method. Input parameters for the numerical simulation were determined by the calibration with laboratory test results. A series of uniaxial compression tests were conducted on red sandstone specimens (100 mm × 50 mm × 50 mm). The mechanical properties and strain energy characteristics of red sandstone were analyzed under different drilling schemes (borehole number, borehole diameter, borehole depth, borehole position, and borehole arrangement angle). The results show that the uniaxial compressive strength (UCS) and strain energy storage capacity of red sandstone decrease by 1.60-39.20% and 35.84-92.77%, respectively after DPR. Moreover, there is a positive correlation between the UCS and elastic strain energy. Further sensitivity analysis of borehole parameters has concluded that the UCS of the specimens is significantly affected by the number of boreholes. In contrast, the borehole diameter prominently affects the strain energy storage capacity. This study verified that DPR has a substantial strength-weakening effect on hard rock, providing a theoretical foundation for further improving the mechanism of DPR in rockburst prevention.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"83 10","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142409515","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}

引用次数: 0

Integrating soil-nailed walls with RC building for seismic stability in space-constrained sites 将土钉墙与钢筋混凝土建筑结合起来，在空间有限的场地实现抗震稳定性

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2024-10-02 DOI: 10.1007/s10064-024-03922-4

Amrita, B. R. Jayalekshmi, R. Shivashankar

{"title":"Integrating soil-nailed walls with RC building for seismic stability in space-constrained sites","authors":"Amrita, B. R. Jayalekshmi, R. Shivashankar","doi":"10.1007/s10064-024-03922-4","DOIUrl":"10.1007/s10064-024-03922-4","url":null,"abstract":"<div><p>In urban environments, space constraints necessitate innovative construction methods. Due to rising demand for infrastructures and scarcity of plane ground, structures are built on sloping or irregular ground. To make use of available land, vertical cuts or excavations are made in the natural soil stratum which can be effectively retained using the soil nailing technique. However, if the area adjacent to the nailed vertical cut is utilised for constructing a multi-storeyed building, the behaviour of the nailed structure may vary. This study examines the impact of the presence of multi-storeyed RC buildings on the response of soil-nailed structures in their proximity during earthquake ground motion. The seismic response of a soil-nailed structure is evaluated in the presence of various heights of medium-rise multi-storeyed buildings. Three-dimensional multi-storeyed buildings and soil-nailed structures are analysed with various arrangements and connectivities between them, taking into account different soil profiles at the site. Dynamic finite element analyses of integrated soil-nailed wall-building systems have been performed using time history data of ground motion. The findings suggest that the integration between the two structures enhances the seismic stability of both the structures under dynamic load as evident in the reduced deformation and acceleration of the structures. It restricts the lateral movement of the nailed wall and reduces its displacement by about 40%. This integration can be implemented in space-constrained sites for optimum utilisation of available space.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"83 10","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142409494","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}

引用次数: 0

Slake durability and mineralogical characteristic of carbonaceous rocks 石渣的耐久性和碳质岩石的矿物学特征

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2024-10-02 DOI: 10.1007/s10064-024-03921-5

Tao Zhang, Yu-Ling Yang

{"title":"Slake durability and mineralogical characteristic of carbonaceous rocks","authors":"Tao Zhang, Yu-Ling Yang","doi":"10.1007/s10064-024-03921-5","DOIUrl":"10.1007/s10064-024-03921-5","url":null,"abstract":"<div><p>The slake durability and the related deterioration mechanism of carbonaceous rocks exposed to adverse external environment are of a great importance to the stability of infrastructure. A series of laboratory tests were conducted to determine their slake durability index <i>I</i><sub>d<i>i</i></sub>, fractal dimension <i>D</i>, total organic carbon (TOC) content, and mineralogical characteristic. The results demonstrated that <i>I</i><sub>d<i>i</i></sub> value decreased rapidly within the first 4 cycles, and then reached a relatively stable state as the test cycle further increased, indicating that effective protective measures should be conducted at the earlier stage of wetting-drying process to minimize the durability deterioration of carbonaceous rock. The discrepancy of carbonaceous rocks in terms of mineralogical characteristic accounted for different slake durability responses at a given cycle. Carbonaceous rock with lower clay minerals content <i>w</i><sub>c</sub> possessed superior slake durability performance, and a power correlation between <i>I</i><sub>d6</sub> and <i>w</i><sub>c</sub> was obtained. Fractal dimension <i>D</i> was found to be an indicator to indirectly describe the durability characteristic of carbonaceous rock. The organic matter imposed negative impact on the slake durability, which was manifested by the carbonaceous rock with higher TOC content exhibited inferior disintegration resistance. The microstructure changes, including an increase in pore volume, pore size, layer spacing, and the presence of new crystalline-like substances, demonstrated the minerals/salts dissolution and chemical reactions within the rock matrix occurred during the slake durability test. These changes were mainly attributed to the hybrid influence of mineralogy and microstructure of carbonaceous rock.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"83 10","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142409499","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}

引用次数: 0

Investigating the impact of urban development on the activation of a paleolandslide. A case study from Pissouri, Cyprus 调查城市发展对古滑坡活化的影响。塞浦路斯皮苏里案例研究

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2024-10-01 DOI: 10.1007/s10064-024-03903-7

Ploutarchos Tzampoglou, Dimitrios Loukidis, Epameinondas Karlas, Cristiano Tolomei, Nikos Svigkas, Giuseppe Pezzo, Niki Koulermou, Aristodemos Anastasiades, Constantinos Loupasakis

{"title":"Investigating the impact of urban development on the activation of a paleolandslide. A case study from Pissouri, Cyprus","authors":"Ploutarchos Tzampoglou, Dimitrios Loukidis, Epameinondas Karlas, Cristiano Tolomei, Nikos Svigkas, Giuseppe Pezzo, Niki Koulermou, Aristodemos Anastasiades, Constantinos Loupasakis","doi":"10.1007/s10064-024-03903-7","DOIUrl":"10.1007/s10064-024-03903-7","url":null,"abstract":"<div><p>The present study investigates the reactivation of a paleolandslide due to the expansion of a community in an area covered by plastic Pliocene marls in the southwestern part of Cyprus. The landslide, which takes place in an area with gently sloping ground and relatively shallow water table, affects more than 100 residential buildings. In the context of the study, building damages and ground surface ruptures were mapped through field work campaigns. Remote sensing data from InSAR (Interferometric Synthetic Aperture Radar) analysis were evaluated in conjunction with available geological, geotechnical and hydrogeological data. Subsequently, the landslide was backanalyzed using the finite element method to examine possible failure mechanism scenarios and shed light on the influence of potential triggering factors. The results indicate that the paleolandslide has been almost fully reactivated, with the main cause of the reactivation being the rising of the phreatic water table due to long-term discharges of wastewater through the absorption pits of the residential developments. The water table rise was further amplified by rainwater infiltration during rainy years. According to the backanalysis results, the slip surface follows the bedding planes of weak marl horizons with residual friction angle of the order of 10°.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"83 10","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10064-024-03903-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142409299","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}

引用次数: 0

Progressive failure characteristics of coal under uniaxial compression: A comprehensive application of micro-ct and digital volume correlation 煤在单轴压缩下的渐进破坏特征：微观ct和数字体积相关性的综合应用

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2024-10-01 DOI: 10.1007/s10064-024-03915-3

Yanbin Yu, Chuanwen Ni, Wenting Cui, Weimin Cheng, Yongtao Chen

{"title":"Progressive failure characteristics of coal under uniaxial compression: A comprehensive application of micro-ct and digital volume correlation","authors":"Yanbin Yu, Chuanwen Ni, Wenting Cui, Weimin Cheng, Yongtao Chen","doi":"10.1007/s10064-024-03915-3","DOIUrl":"10.1007/s10064-024-03915-3","url":null,"abstract":"<div><p>This study examines the failure process of coal under uniaxial compression using in-situ CT scanning with X-ray computed tomography. By integrating digital core technology and digital volume correlation (DVC), the research analyzes the development and evolution of fractures and calculates displacement and strain fields, offering reliable data for understanding failure mechanisms. Additionally, the study simulates fluid seepage within coal under varying loads, revealing the relationship between structural changes and permeability. The findings show that coal under uniaxial loading experiences both fracture development and compression, influenced by axial forces and the development of adjacent fractures. Minerals within coal play a guiding role in fracture development, shaped by their form and distribution. DVC results demonstrate that coal destruction is a dynamic, evolving process driven by deformation differences across regions and directions. Displacement vectors show coal matrix migration in multiple directions, while strain fields reveal lateral fracture expansion under axial compression. As loading progresses, fracture tortuosity decreases, and throat numbers rise to 6353, leading to increased permeability, notably a 149.35 μm<sup>2</sup> increase at the 1.1kN stage. This study deepens the understanding of coal's destructive characteristics and contributes to mining disaster prevention and control, with significant implications for coal engineering and resource development.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"83 10","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142409300","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}

引用次数: 0

Behaviors of anthracite under differential cyclic loading (DCL) after wet and dry cycling: Deformability and hysteresis characteristics 无烟煤在干湿循环后的差异循环加载 (DCL) 下的行为：变形性和滞后特性

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2024-10-01 DOI: 10.1007/s10064-024-03927-z

Yunfeng Wu, Zhengyang Song, Yu Wang, Peng Li, Baokun Zhou, Zhen Yang, Changhong Li

{"title":"Behaviors of anthracite under differential cyclic loading (DCL) after wet and dry cycling: Deformability and hysteresis characteristics","authors":"Yunfeng Wu, Zhengyang Song, Yu Wang, Peng Li, Baokun Zhou, Zhen Yang, Changhong Li","doi":"10.1007/s10064-024-03927-z","DOIUrl":"10.1007/s10064-024-03927-z","url":null,"abstract":"<div><p>Coal, as a key material in underground reservoirs of coal mines, poses safety challenges to the stability of coal-formed dams due to periodic excavation and fluctuations in groundwater levels. This work focuses on the behaviours of anthracite under differential cyclic loading (DCL), also examining the impact of wet and dry cycles on behaviour of coal in coal mine based underground water reservoirs (CMUWR). Seven sets of coal samples and processed coal flakes were subjected to wet and dry treatments. Mechanical tests were conducted using two DCL paths (rapid loading and slow unloading and vice versa). The parameters of poisson's ratio, damping ratio, strain growth rate and phase shift are analyzed. Compared with fast loading, slow loading demonstrated higher damping ratio, strain growth rate, hysteresis ratio, and hysteresis time probability distributions. Moreover, the number of cracks and crack widths observed after wet and dry cycling of the flakes were directly proportional to the number of wet and dry cycles undergone. By understanding the mechanical properties of coal under wet and dry cyclic loading, engineers and researchers can make informed decisions to enhance the stability and safety of underground water reservoirs. </p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"83 10","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142409352","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}

引用次数: 0