Tunnelling and Underground Space Technology最新文献_第6页

Analysis and layout parameter optimization study for high-level radioactive waste disposal units in granite host rock 花岗岩主岩高放废物处置单元分析及布置参数优化研究

IF 7.4 1区工程技术

Tunnelling and Underground Space Technology Pub Date : 2026-05-01 Epub Date: 2026-01-22 DOI: 10.1016/j.tust.2026.107474

Biao Wang , Zaobao Liu , Liang Chen , Hongsu Ma , Bo Lu , Sun Jian , Xi Du

{"title":"Analysis and layout parameter optimization study for high-level radioactive waste disposal units in granite host rock","authors":"Biao Wang , Zaobao Liu , Liang Chen , Hongsu Ma , Bo Lu , Sun Jian , Xi Du","doi":"10.1016/j.tust.2026.107474","DOIUrl":"10.1016/j.tust.2026.107474","url":null,"abstract":"<div><div>The long-term strength of rocks under high-temperature and high-pressure conditions is crucial for assessing the stability of high-level radioactive waste disposal facilities. This study investigates the thermomechanical behavior of Beishan granite, a candidate host rock for Chinese high-level radioactive waste repository, under coupled thermal–mechanical loading. A series of triaxial direct shear creep tests integrated with acoustic emission monitoring were conducted to analyze the damage evolution and failure mechanisms of the rock. Results reveal that as temperature increases from 30 °C to 150 °C, the proportion of tensile failure in the granite increases from 29.03 % to 51.36 %. A thermo-mechanically coupled viscoelastic damage constitutive model is developed to accurately capture the time-dependent mechanical response of granite under triaxial direct shear. After validation against experimental data, the model is implemented into a finite element framework via a user subroutine to predict the long-term stability of an high-level radioactive waste disposal unit. Furthermore, fuzzy set theory was applied to optimize the layout parameters of the disposal unit, leading to an enhanced safety and efficiency profile; the optimal layout is determined with a canister number (<em>N<sub>C</sub></em>) to canister spacing (<em>S<sub>C</sub></em>) to unit spacing (<em>S<sub>I</sub></em>) ratio of 1:3:10. These results provide valuable insights into the thermo-mechanical behavior of granite and offer a practical tool supporting the design and safety evaluation of deep geological repositories, thereby facilitating the sustainable development of nuclear energy.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"171 ","pages":"Article 107474"},"PeriodicalIF":7.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146033342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Intelligent and autonomous pipeline deposit tracking based on a multi-object tracking framework 基于多目标跟踪框架的管道沉积物智能自主跟踪

IF 7.4 1区工程技术

Tunnelling and Underground Space Technology Pub Date : 2026-05-01 Epub Date: 2026-01-21 DOI: 10.1016/j.tust.2026.107463

Louis Ngai Yuen Wong , Sihao Yu , Kazaf Yuen Pan Wong

{"title":"Intelligent and autonomous pipeline deposit tracking based on a multi-object tracking framework","authors":"Louis Ngai Yuen Wong , Sihao Yu , Kazaf Yuen Pan Wong","doi":"10.1016/j.tust.2026.107463","DOIUrl":"10.1016/j.tust.2026.107463","url":null,"abstract":"<div><div>Pipelines play a significant role in transferring energies, materials and fulfilling public needs. However, conventional pipeline maintenance approaches predominantly depend on human inspection of captured closed circuit television (CCTV) records, a process that is particularly labor-intensive and time-consuming for lengthy pipelines. To address these limitations, this study proposes an autonomous framework based on the multi-object tracking (MOT) algorithm for efficient and accurate deposit detection and tracking within pipelines, significantly reducing the need for manual intervention. The proposed MOT model has been trained and validated on a customized pipe CCTV dataset, consisting of more than 12,000 video frames. The experimental results indicate that the combination of YOLOX (for detection) and BYTE (for tracking) achieves the highest MOTA, IDF1 and HOTA among all the tested models, with values of 87.4 %, 90.1 % and 78.7 %, respectively. Further testing conducted on a real-world sewer pipeline project demonstrates the robustness of our model. The estimation error of the deposit location predicted by the MOT model is less than ± 0.1 m, with a mean absolute error of only 0.06 m. These findings highlight the substantial advantages of the autonomous MOT system over manual methods, including improved efficiency, consistent accuracy and reduced labor demands, thus demonstrating its reliability and significant application potential for practical engineering practice.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"171 ","pages":"Article 107463"},"PeriodicalIF":7.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146014887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Mechanical transmission analysis of thrust systems of shield tunneling machines 盾构掘进机推力系统的机械传动分析

IF 7.4 1区工程技术

Tunnelling and Underground Space Technology Pub Date : 2026-05-01 Epub Date: 2026-01-20 DOI: 10.1016/j.tust.2026.107465

Xuyang Wang , Dajun Yuan , Yong Fang , Dalong Jin , Yubo Wang

引用次数: 0

Field data-based safety assessment and probabilistic deformation prediction of existing metro tunnels under adjacent excavation 基于现场数据的临近开挖地铁既有隧道安全评价与概率变形预测

IF 7.4 1区工程技术

Tunnelling and Underground Space Technology Pub Date : 2026-05-01 Epub Date: 2026-01-15 DOI: 10.1016/j.tust.2026.107443

Wei-Bin Chen , Hai-Tong Liu , Yue Chen , Xiang-Sheng Chen , Tao Xu , Jing-Song Bai , Lin-Shuang Zhao

{"title":"Field data-based safety assessment and probabilistic deformation prediction of existing metro tunnels under adjacent excavation","authors":"Wei-Bin Chen , Hai-Tong Liu , Yue Chen , Xiang-Sheng Chen , Tao Xu , Jing-Song Bai , Lin-Shuang Zhao","doi":"10.1016/j.tust.2026.107443","DOIUrl":"10.1016/j.tust.2026.107443","url":null,"abstract":"<div><div>The stratum disturbance caused by excavation will threaten the structural integrity and operational safety of the existing metro tunnels. The data-driven approach proposed in this study mainly focuses on the safety assessment and probabilistic deformation prediction of existing metro tunnels under adjacent excavation operations. In deformation prediction, comparison of the Elman neural network, extreme gradient boosting, support vector machine, and random forest model shows the extreme gradient boosting achieves excellent accuracy and captures convergence variation patterns robustly. For safety assessment, principal component analysis fuses three key deformation indices to generate a comprehensive parameter <span><math><mrow><mi>Q</mi></mrow></math></span>. After normality tests confirm <span><math><mrow><mi>Q</mi></mrow></math></span> approximates a normal distribution, the “68-95 rule” classifies tunnel safety into 4 levels. For the left tunnel line, the 180-day forecast shows that the deployment of monitoring points under slightly enhanced Level 3 frequency can be moderately expanded. For the right tunnel line, the proportion of high/enhanced-frequency monitoring points can be proportionally reduced. In probabilistic deformation prediction, K-means clustering identifies two optimal clusters for both tunnel lines. Larger Bootstrap sampling enhances the statistical stability of the expendance percentage distribution. Left-line Cluster 2 shows persistently high expendance percentages while right-line Cluster 1 carries higher risk, likely owing to greater burial depth and in-situ stress. Level 1 high-frequency monitoring supplemented by multi-source data is recommended for both high-risk clusters. The proposed risk assessment framework is expected to promote the transformation from empirical thresholds to statistical thresholds and from static risk mapping to dynamic risk mapping.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"171 ","pages":"Article 107443"},"PeriodicalIF":7.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Coupled ventilation-slope effects on flame dynamics and temperature distribution in high-speed train compartment fires 高速列车车厢火灾中通风-坡度耦合对火焰动力学和温度分布的影响

IF 7.4 1区工程技术

Tunnelling and Underground Space Technology Pub Date : 2026-05-01 Epub Date: 2026-01-12 DOI: 10.1016/j.tust.2026.107459

Zhihan Zhou , Yanhong Xi , Jun Mao , Guilan Yu , Wanki Chow

{"title":"Coupled ventilation-slope effects on flame dynamics and temperature distribution in high-speed train compartment fires","authors":"Zhihan Zhou , Yanhong Xi , Jun Mao , Guilan Yu , Wanki Chow","doi":"10.1016/j.tust.2026.107459","DOIUrl":"10.1016/j.tust.2026.107459","url":null,"abstract":"<div><div>This study systematically investigates the fluctuating characteristics and temperature field distribution of carriage fires through a series of scaled-down (1:8) modeling experiments. The fire development process was observed to exhibit two distinct stages: a fuel-controlled stage characterized by monotonically increasing maximum temperatures with heat release rate, and a ventilation-controlled phase showing a decreasing trend in maximum temperature. Parametric studies revealed that the maximum temperature during the fuel-controlled phase is primarily governed by heat release rate and ventilation factor, while demonstrating a weak correlation with gradient. A power law relationship was established between dimensionless maximum temperature, dimensionless heat release rate, and wall heat loss. Furthermore, a temperature decay prediction model incorporating slope-opening coupling effects was developed, featuring two key coefficients: Coefficient <span><math><mrow><mi>α</mi></mrow></math></span>, dependent on gradient (θ), exhibited a 12.8 % variation rate as θ increased from 0 to 0.0764, reflecting the enhancement of buoyancy-driven flow. Coefficient <span><math><mrow><mi>β</mi></mrow></math></span>, determined by opening geometry (proportional to the 0.15th power of the opening height-to-width ratio), was attributed to strong turbulent mixing effects. By integrating the maximum temperature and decay models, a comprehensive temperature field prediction model was developed for inclined railway carriage fires with lateral openings (W/H: 0.45–4.55) and gradients (θ: 0–0.0764). The model demonstrated high accuracy, with prediction errors consistently below 10 %. This work provides an improved predictive framework for temperature fields in inclined railway carriage fires and offers a valuable theoretical foundation for train fire safety design.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"171 ","pages":"Article 107459"},"PeriodicalIF":7.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145957104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Mode-Dependent optimal positioning of evacuation Guides: An Experimental–Modeling study on static and dynamic guidance effect 基于模式的疏散导流器最优定位：静态和动态导流效果的实验建模研究

IF 7.4 1区工程技术

Tunnelling and Underground Space Technology Pub Date : 2026-05-01 Epub Date: 2026-01-12 DOI: 10.1016/j.tust.2026.107458

Weisong Liu , Jun Zhang , Rui Ba , Weiguo Song

{"title":"Mode-Dependent optimal positioning of evacuation Guides: An Experimental–Modeling study on static and dynamic guidance effect","authors":"Weisong Liu , Jun Zhang , Rui Ba , Weiguo Song","doi":"10.1016/j.tust.2026.107458","DOIUrl":"10.1016/j.tust.2026.107458","url":null,"abstract":"<div><div>The guides can help pedestrians find exits, thereby improving evacuation efficiency and reducing casualties in emergency. This study investigates how guides affect crowd evacuations via controlled experiments and modeling. To investigate the influence of guide on crowd evacuation, a Social Force Model with Guidance (SFMG) has been established by embedding the guidance term into the social force framework. The interaction mechanism between a guide and pedestrians was studied by performing crowd movement experiments under different guidance modes (dynamic/static), movement speeds and crowd densities. The guidance attraction force formula involving the above variables has been proposed. It is revealed that the guidance attraction field is influenced by the guidance mode and speed. Subsequently, the simulations in a subway platform under varying visibility conditions were conducted and the influence of the initial layout of guides on crowd evacuation efficiency was studied. The results revealed that arranging guides in the areas far from the exit can facilitate the crowd evacuation. The distance between the guide’s initial position and exit was denoted as <em>D.</em> in the simulation analyses. A variable <em>DR</em> (distance ratio) calculated by the ratio of <em>D</em> to the length of the platform subzone was adopted to quantity guide’s initial position. Dynamic guide: The higher <em>DR</em> results in the shorter evacuation time under low visibility. But the optimal initial position of guide shifts slightly closer to the exit with increasing visibility. Static guide: The U-shaped relationship between evacuation time and <em>DR</em> is observed. The optimal position falls within the 40 %∼60 % <em>DR</em>. These findings are helpful to design indoor emergency guidance plan, and the optimal positioning rules are transferable to common building layouts.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"171 ","pages":"Article 107458"},"PeriodicalIF":7.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145957105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Safety performance evaluation of tunnel with void behind lining using an artificial neural network 基于人工神经网络的衬砌后空隧道安全性能评价

IF 7.4 1区工程技术

Tunnelling and Underground Space Technology Pub Date : 2026-05-01 Epub Date: 2026-01-19 DOI: 10.1016/j.tust.2026.107467

Guoshuai Wei , Xuepeng Zhang , Yujing Jiang , Ningbo Li , Bo Li , Zhenyu Xu

{"title":"Safety performance evaluation of tunnel with void behind lining using an artificial neural network","authors":"Guoshuai Wei , Xuepeng Zhang , Yujing Jiang , Ningbo Li , Bo Li , Zhenyu Xu","doi":"10.1016/j.tust.2026.107467","DOIUrl":"10.1016/j.tust.2026.107467","url":null,"abstract":"<div><div>The presence of voids behind tunnel linings can have a substantial impact on the safety performance of the tunnel. An accurate and quick evaluation for the tunnel safety performance is of significant importance for the maintenance of the infrastructure. In the current study, the minimum relative safety coefficient is proposed to evaluate the safety performance of the lining, and an artificial neural network is applied to predict the safety performance of tunnel with void behind lining. Firstly, the numerical simulations verified by physical model tests were employed to examine how the void defects affect the safety performance of the lining. Key findings indicate that void defects instigate substantial alterations in the distribution of inner force. The dangerous points are primarily concentrated in the void and its vicinity or the arch foot. Furthermore, the numerical simulation test scheme is generated using an orthogonal test design, thereby avoiding the omission of extreme working conditions that pose a danger. Finally, an artificial neural network model is proposed to predict the safety performance based on the results of numerical simulation. Nine factors are considered as input variables including the location of void, the circumferential length of void, the radial length of void, the longitudinal length of void, the buried depth of tunnel, the lateral pressure coefficient, the surrounding rock class, the lining concrete class, and the deterioration degree of lining, while the minimum relative safety coefficient is considered as the output variable. The accuracy of the prediction model could reach up to 97.53%, illustrating its effectiveness of evaluating the safety performance of defected tunnels.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"171 ","pages":"Article 107467"},"PeriodicalIF":7.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146001001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

3D response analysis of tunnels in layered media subjected to asynchronous ground motions using MLM-DRM 基于MLM-DRM的层状介质隧道在异步地震动作用下的三维响应分析

IF 7.4 1区工程技术

Tunnelling and Underground Space Technology Pub Date : 2026-05-01 Epub Date: 2026-01-19 DOI: 10.1016/j.tust.2026.107470

Bhavesh Banjare, Goudappa Ramanagouda Dodagoudar

{"title":"3D response analysis of tunnels in layered media subjected to asynchronous ground motions using MLM-DRM","authors":"Bhavesh Banjare, Goudappa Ramanagouda Dodagoudar","doi":"10.1016/j.tust.2026.107470","DOIUrl":"10.1016/j.tust.2026.107470","url":null,"abstract":"<div><div>Underground tunnels are crucial parts of modern urban infrastructure and are used for a wide range of applications worldwide. Tunnels situated in layered soil media respond differently to seismic loads compared to surface structures. Historically, earthquakes have caused major damage to tunnels, including cracks in the lining, joint separation, leaks, and even collapse. Most previous studies have focused on the plane strain response of tunnels. However, these 2D analyses cannot explain the 3D deformation patterns seen in tunnels near earthquake faults or scenarios where the properties of the tunnel/soil, or the seismic wavefield, vary along the tunnel axis. Factors such as wave passage effects, layered geology, and fault inclinations greatly impact the dynamic response of tunnels during earthquakes. To address these issues, a more accurate and robust approach involving asynchronous excitation is necessary to account for the spatial variability of seismic forces. A Multi-Layer Modified Domain Reduced Method (MLM-DRM) is extended in this study, which reduces computational time and cost while maintaining high modeling accuracy. Three tunnel cross-sections at different locations in layered media are analyzed to show how variations in geometric and geotechnical parameters affect seismic performance. The von Mises stress distribution around the tunnel circumference is examined at various time steps to observe transient stress evolution. Response spectra are evaluated at different locations of tunnel circumference. The results highlight the significance of geological stratification, spatial wave propagation, and fault inclination in determining tunnel behavior under seismic loads, providing essential insights for advancing seismic design practices that enhance tunnel resilience, operational safety, and serviceability during and after earthquakes.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"171 ","pages":"Article 107470"},"PeriodicalIF":7.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146001003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Mechanical performance and damage characteristics of segmental joints in semi-rigid element immersed tunnel under bending deformation: A combined experimental and numerical study 弯曲变形下半刚性单元沉管隧道分段节理力学性能及损伤特征：试验与数值结合研究

IF 7.4 1区工程技术

Tunnelling and Underground Space Technology Pub Date : 2026-05-01 Epub Date: 2026-01-03 DOI: 10.1016/j.tust.2025.107427

Zhinan Hu , Yuejian Wang , Shaobo Qin , Shunde Yin , Haiyang Pan , Kaimeng Ma

{"title":"Mechanical performance and damage characteristics of segmental joints in semi-rigid element immersed tunnel under bending deformation: A combined experimental and numerical study","authors":"Zhinan Hu , Yuejian Wang , Shaobo Qin , Shunde Yin , Haiyang Pan , Kaimeng Ma","doi":"10.1016/j.tust.2025.107427","DOIUrl":"10.1016/j.tust.2025.107427","url":null,"abstract":"<div><div>The mechanical performance of segmental joints in semi-rigid element immersed tunnels is influenced significantly by differential settlement. The mechanical behaviors and failure mechanisms of segmental joints under longitudinal differential settlement were investigated in this study. The validity of the numerical simulation methods was verified through 1:10 scale physical model tests. Subsequently, a full-scale segmental joint model of the Hong Kong-Zhuhai-Macao Bridge (HZMB) immersed tunnel was established. Systematic analyses of the mechanical responses, damage evolution, and sensitive damage zones were conducted. Based on the observations, an optimized design scheme was proposed. It provides theoretical and technical support for structural health monitoring and optimization. The results indicate that the bending resistance of semi-rigid element segment joints is provided primarily by the prestressed cables on the open side. As the rotation angle increases, the rotation center moves upward, and the contact stress concentrates on the top plate. The shear force of the shear keys first decreases and then increases. This is related to their mechanical performance. Shear keys function mainly in shear rather than bending. Tensile and compressive damage concentration zones oriented at 45° form near the shear keys in both middle-wall and side-walls of the segments. The tensile damage at the side-wall shear keys occurs earlier. At 0.004 rad, tensile damage is observed at the middle-wall shear keys (also oriented at 45°). Based on the damage characteristics of the segmental joint, an optimized design scheme using high ductility concrete (HDC) for vertical shear keys was proposed. After optimization, the toughness of the shear keys was enhanced significantly, and the plastic damage was delayed effectively.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"171 ","pages":"Article 107427"},"PeriodicalIF":7.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145895543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Principle analysis and device development of a novel technology for preventing lockset failure and cable bolt ejection 一种防止锁套失效和电缆螺栓弹射新技术的原理分析和装置研制

IF 7.4 1区工程技术

Tunnelling and Underground Space Technology Pub Date : 2026-05-01 Epub Date: 2026-01-29 DOI: 10.1016/j.tust.2025.107384

Housheng Jia , Zhiming Zhang , Yanxi Gao , Mengxiong Fu , Guoying Wang , Chao Li , Bo Peng , Wenyuan Jiang

{"title":"Principle analysis and device development of a novel technology for preventing lockset failure and cable bolt ejection","authors":"Housheng Jia , Zhiming Zhang , Yanxi Gao , Mengxiong Fu , Guoying Wang , Chao Li , Bo Peng , Wenyuan Jiang","doi":"10.1016/j.tust.2025.107384","DOIUrl":"10.1016/j.tust.2025.107384","url":null,"abstract":"<div><div>To address the failure of cable bolt locksets under frequent surrounding rock vibrations, this study focuses on the mining roadway with rock burst hazards in the B2 coal seam of the Kuangou Coal Mine. A surrounding rock vibration simulation device (SRVS) was developed through theoretical analysis, numerical simulation, laboratory testing, and field experiments. The SRVS was used to investigate mechanisms of cable bolt lockset failure. A novel technology for preventing lockset failure and cable bolt ejection was proposed, and the operational principle of this technology was analyzed. The study identifies frequent low-energy vibrations as the root cause of the progressive loosening and eventual failure of locksets, with there being a positive linear correlation between the vibration frequency and lockset failure rate. Introducing a small anti-retreat force below the lockset improves its locking performance. For instance, applying a 100 N anti-retreat force increases the lockset’s failure thrust by 152 kN—a 48 % improvement. Based on these findings, an integrated device for preventing lockset failure and cable bolt ejection (DPFE), primarily comprising an anti-retreat device and anti-eject structure, was developed. The device applies an anti-retreat force to the lockset while increasing the outer diameter of the cable bolt below the lockset, further preventing the lockset from loosening, greatly improving the locking force of the lockset, preventing the lockset from failing, and preventing the broken cable bolt from ejecting. Engineering comparative tests conducted on the mining roadway of the I010206 working face in the B2 coal seam of the Kuangou Coal Mine showed that 17 % of cable bolts without the DPFE experienced lockset slippage or drop. In contrast, bolts equipped with the DPFE showed no signs of lockset failure throughout the mining process.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"171 ","pages":"Article 107384"},"PeriodicalIF":7.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146071625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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