Journal of Rock Mechanics and Geotechnical Engineering最新文献_第6页

Anisotropic characteristics of layered backfill: Mechanical properties and energy dissipation 层状充填体各向异性特征:力学性能与能量耗散

IF 7.3 1区工程技术

Journal of Rock Mechanics and Geotechnical Engineering Pub Date : 2023-12-01 DOI: 10.1016/j.jrmge.2023.02.034

Huisheng Qu , Lang Liu , Yonglu Suo , Mengbo Zhu , Pan Yang , Caixing Zhang , Geng Xie

{"title":"Anisotropic characteristics of layered backfill: Mechanical properties and energy dissipation","authors":"Huisheng Qu , Lang Liu , Yonglu Suo , Mengbo Zhu , Pan Yang , Caixing Zhang , Geng Xie","doi":"10.1016/j.jrmge.2023.02.034","DOIUrl":"10.1016/j.jrmge.2023.02.034","url":null,"abstract":"<div><p>Layered backfill is commonly used in mining operations, and its mechanical behavior is strongly influenced by delamination parameters. In this study, 13 specimens with different numbers of delamination and delamination angle were prepared to investigate the anisotropic mechanical behavior, energy dissipation characteristics and crack development of backfill. P-wave velocity, uniaxial compression, scanning electron microscope (SEM), and acoustic emission (AE) experiments were conducted. The results indicate that: (1) The P-wave velocity has linear and elliptical relationships with the number of delamination surface and delamination angle, respectively; the strength, delamination parameters and P-wave velocity show a high degree of coincidence in terms of their function relationship, which can realize the rapid prediction of strength. (2) The microstructure of the delaminated surface is looser than that of the matrix, leading to a decrease in strength and an increase at the pore-fissure compaction stage. The number and angle of delamination increase linearly with the anisotropy coefficient. (3) The energy evolution in angle-cut backfill can be divided into four stages, with a decrease in the proportion of elastic energy at the initiation stress and peak stress with increasing number of delamination planes and delamination angle. (4) Crack development increases with the number of delamination surface and delamination angle, resulting in a decrease in energy dissipation coefficient and peak AE energy. These findings provide valuable insights for the design of filling materials and processes in mining operations.</p></div>","PeriodicalId":54219,"journal":{"name":"Journal of Rock Mechanics and Geotechnical Engineering","volume":"15 12","pages":"Pages 3188-3208"},"PeriodicalIF":7.3,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674775523002676/pdfft?md5=d7f10f652fb6c88791b8bdb5ddaa8411&pid=1-s2.0-S1674775523002676-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136152700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Performance assessment of borehole arrangements for the design of rectangular shallow foundation systems 矩形浅基础体系设计钻孔布置的性能评价

IF 7.3 1区工程技术

Journal of Rock Mechanics and Geotechnical Engineering Pub Date : 2023-12-01 DOI: 10.1016/j.jrmge.2023.05.009

Marcin Chwała , Danko J. Jerez , Hector A. Jensen , Michael Beer

{"title":"Performance assessment of borehole arrangements for the design of rectangular shallow foundation systems","authors":"Marcin Chwała , Danko J. Jerez , Hector A. Jensen , Michael Beer","doi":"10.1016/j.jrmge.2023.05.009","DOIUrl":"10.1016/j.jrmge.2023.05.009","url":null,"abstract":"<div><p>This study proposes a framework to evaluate the performance of borehole arrangements for the design of rectangular shallow foundation systems under spatially variable soil conditions. Performance measures are introduced to quantify, for a fixed foundation layout and given soil sounding locations, the variability level of the foundation system bearing capacities in terms of their mean values and standard deviations. To estimate these measures, the recently proposed random failure mechanism method (RFMM) has been adopted and extended to consider any arrangement of rectangular foundations and boreholes. Hence, three-dimensional bearing capacity estimation under spatially variable soil can be efficiently performed. Several numerical examples are presented to illustrate the applicability of the proposed framework, including diverse foundation arrangements and different soil correlation structures. Overall, the proposed framework represents a potentially useful tool to support the design of geotechnical site investigation programs, especially in situations where very limited prior knowledge about the soil properties is available.</p></div>","PeriodicalId":54219,"journal":{"name":"Journal of Rock Mechanics and Geotechnical Engineering","volume":"15 12","pages":"Pages 3291-3304"},"PeriodicalIF":7.3,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674775523001695/pdfft?md5=5433314c5c7a92a29cdaf0c5b5a226ab&pid=1-s2.0-S1674775523001695-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45451605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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: 2

Macro-micro behaviors and failure mechanism of frozen weakly cemented mudstone 冷冻弱胶结泥岩的宏观-微观行为和破坏机理

IF 7.3 1区工程技术

Journal of Rock Mechanics and Geotechnical Engineering Pub Date : 2023-12-01 DOI: 10.1016/j.jrmge.2023.06.024

Xianzhou Lyu, Jijie Du, Hao Fu, Dawei Lyu, Weiming Wang

引用次数: 0

Stabilisation of estuarine sediments with an alkali-activated cement for deep soil mixing applications 使用碱活性水泥稳定河口沉积物，用于深层土壤混合应用

IF 7.3 1区工程技术

Journal of Rock Mechanics and Geotechnical Engineering Pub Date : 2023-12-01 DOI: 10.1016/j.jrmge.2023.08.020

C. Pinheiro, S. Rios, A. Viana da Fonseca, N. Cristelo

引用次数: 0

A multifunctional shear apparatus for rocks subjected to true triaxial stress and high temperature in real-time 用于实时承受真实三轴应力和高温的岩石的多功能剪切设备

IF 7.3 1区工程技术

Journal of Rock Mechanics and Geotechnical Engineering Pub Date : 2023-12-01 DOI: 10.1016/j.jrmge.2023.10.006

Jun Zhao, Xia-Ting Feng, Jia-Rong Wang, Liang Hu, Yue Guo

引用次数: 0

Hydromechanical characterization of gas transport amidst uncertainty for underground nuclear explosion detection 用于地下核爆炸探测的不确定性气体输送的水力机械特性分析

IF 7.3 1区工程技术

Journal of Rock Mechanics and Geotechnical Engineering Pub Date : 2023-12-01 DOI: 10.1016/j.jrmge.2023.09.018

Wenfeng Li, Chelsea W. Neil, J. W. Carey, Meng Meng, L. Frash, P. H. Stauffer

引用次数: 0

Evaluation of the coefficient of lateral stress at rest of granular materials under repetitive loading conditions 评估重复加载条件下颗粒材料静止时的横向应力系数

IF 7.3 1区工程技术

Journal of Rock Mechanics and Geotechnical Engineering Pub Date : 2023-12-01 DOI: 10.1016/j.jrmge.2023.07.024

Heerym Han, Hyunwook Choo, Junghee Park

引用次数: 0

Advances in joint roughness coefficient (JRC) and its engineering applications 节理粗糙度系数及其工程应用研究进展

IF 7.3 1区工程技术

Journal of Rock Mechanics and Geotechnical Engineering Pub Date : 2023-12-01 DOI: 10.1016/j.jrmge.2023.02.002

Nick Barton , Changshuo Wang , Rui Yong

{"title":"Advances in joint roughness coefficient (JRC) and its engineering applications","authors":"Nick Barton , Changshuo Wang , Rui Yong","doi":"10.1016/j.jrmge.2023.02.002","DOIUrl":"10.1016/j.jrmge.2023.02.002","url":null,"abstract":"<div><p>The joint roughness coefficient (<em>JRC</em>), introduced in Barton (1973) represented a new method in rock mechanics and rock engineering to deal with problems related to joint roughness and shear strength estimation. It has the advantages of its simple form, easy estimation, and explicit consideration of scale effects, which make it the most widely accepted parameter for roughness quantification since it was proposed. As a result, <em>JRC</em> has attracted the attention of many scholars who have developed <em>JRC</em>-related methods in many areas, such as geological engineering, multidisciplinary geosciences, mining mineral processing, civil engineering, environmental engineering, and water resources. Because of such a developing trend, an overview of <em>JRC</em> is presented here to provide a clear perspective on the concepts, methods, applications, and trends related to its extensions. This review mainly introduces the origin and connotation of <em>JRC</em>, <em>JRC</em>-related roughness measurement, <em>JRC</em> estimation methods, <em>JRC</em>-based roughness characteristics investigation, <em>JRC</em>-based rock joint property description, <em>JRC</em>'s influence on rock mass properties, and <em>JRC</em>-based rock engineering applications. Moreover, the representativeness of the joint samples and the determination of the sampling interval for rock joint roughness measurements are discussed. In the future, the existing <em>JRC</em>-related methods will likely be further improved and extended in rock engineering.</p></div>","PeriodicalId":54219,"journal":{"name":"Journal of Rock Mechanics and Geotechnical Engineering","volume":"15 12","pages":"Pages 3352-3379"},"PeriodicalIF":7.3,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674775523000550/pdfft?md5=81767493837e3b4f3d5c788cfd495095&pid=1-s2.0-S1674775523000550-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47258597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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: 10

A hybrid attention deep learning network for refined segmentation of cracks from shield tunnel lining images 一种用于盾构隧道衬砌图像裂纹精细分割的混合注意力深度学习网络

IF 7.3 1区工程技术

Journal of Rock Mechanics and Geotechnical Engineering Pub Date : 2023-12-01 DOI: 10.1016/j.jrmge.2023.02.025

Shuai Zhao , Guokai Zhang , Dongming Zhang , Daoyuan Tan , Hongwei Huang

{"title":"A hybrid attention deep learning network for refined segmentation of cracks from shield tunnel lining images","authors":"Shuai Zhao , Guokai Zhang , Dongming Zhang , Daoyuan Tan , Hongwei Huang","doi":"10.1016/j.jrmge.2023.02.025","DOIUrl":"10.1016/j.jrmge.2023.02.025","url":null,"abstract":"<div><p>This research developed a hybrid position-channel network (named PCNet) through incorporating newly designed channel and position attention modules into U-Net to alleviate the crack discontinuity problem in channel and spatial dimensions. In PCNet, the U-Net is used as a baseline to extract informative spatial and channel-wise features from shield tunnel lining crack images. A channel and a position attention module are designed and embedded after each convolution layer of U-Net to model the feature interdependencies in channel and spatial dimensions. These attention modules can make the U-Net adaptively integrate local crack features with their global dependencies. Experiments were conducted utilizing the dataset based on the images from Shanghai metro shield tunnels. The results validate the effectiveness of the designed channel and position attention modules, since they can individually increase balanced accuracy (BA) by 11.25% and 12.95%, intersection over union (IoU) by 10.79% and 11.83%, and F<sub>1</sub> score by 9.96% and 10.63%, respectively. In comparison with the state-of-the-art models (i.e. LinkNet, PSPNet, U-Net, PANet, and Mask R–CNN) on the testing dataset, the proposed PCNet outperforms others with an improvement of BA, IoU, and F<sub>1</sub> score owing to the implementation of the channel and position attention modules. These evaluation metrics indicate that the proposed PCNet presents refined crack segmentation with improved performance and is a practicable approach to segment shield tunnel lining cracks in field practice.</p></div>","PeriodicalId":54219,"journal":{"name":"Journal of Rock Mechanics and Geotechnical Engineering","volume":"15 12","pages":"Pages 3105-3117"},"PeriodicalIF":7.3,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674775523001117/pdfft?md5=57f6715326db846457d96e008e93bcb3&pid=1-s2.0-S1674775523001117-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44979779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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: 2

Surrogate modeling for unsaturated infiltration via the physics and equality-constrained artificial neural networks 通过物理和平等约束人工神经网络建立非饱和渗透代用模型

IF 7.3 1区工程技术

Journal of Rock Mechanics and Geotechnical Engineering Pub Date : 2023-12-01 DOI: 10.1016/j.jrmge.2023.09.014

Peng Lan, Jingjing Su, Sheng Zhang

引用次数: 0