International Journal of Mining Science and Technology最新文献_第8页

A PCM-based active temperature-preserved coring method for deep sea natural gas hydrate 基于pcm的深海天然气水合物主动保温取心方法

IF 13.7 1区工程技术 Q1 MINING & MINERAL PROCESSING

International Journal of Mining Science and Technology

Pub Date : 2025-11-01 Epub Date: 2025-10-07 DOI: 10.1016/j.ijmst.2025.08.012

Han Wu , Yunqi Hu , Chenghang Fu , Ling Chen , Zhiqiang He , Meng Xu , Heping Xie

Natural gas hydrate (NGH) has a bright future as a clean energy source with huge reserves. Coring is one of the most direct methods for NGH exploration and research. Preserving the in-situ properties of the core as much as possible during the coring process is crucial for the assessment of NGH resources. However, most existing NGH coring techniques cannot preserve the in-situ temperature of NGH, leading to distortion of the physical properties of the obtained core, which makes it difficult to effectively guide NGH exploration and development. To overcome this limitation, this study introduces an innovative active temperature-preserved coring method for NGH utilizing phase change materials (PCM). An active temperature-preserved corer (ATPC) is designed and developed, and an indoor experimental system is established to investigate the heat transfer during the coring process. Based on the experimental results under different environment temperatures, a heat transfer model for the entire ATPC coring process has been established. The indoor experimental results are consistent with the theoretical predictions of the heat transfer model, confirming its validity. This model has reconstructed the temperature changes of the NGH core during the coring process, demonstrating that compared to the traditional coring method with only passive temperature-preserved measures, ATPC can effectively reduce the core temperature by more than 5.25 °C. With ATPC, at environment temperatures of 15, 20, 25, and 30 °C, the duration of low-temperature state for the NGH core is 53.85, 32.87, 20.32, and 11.83 min, respectively. These findings provide new perspectives on temperature-preserving core sampling in NGH and provide technical support for exploration and development in NGH.

天然气水合物作为一种储量巨大的清洁能源，有着广阔的发展前景。取心是天然气水合物勘探和研究最直接的方法之一。在取心过程中尽可能地保留岩心的原位性质对天然气水合物资源的评价至关重要。然而，现有的天然气水合物取心技术大多不能保持天然气水合物的原位温度，导致获得的岩心物性发生畸变，难以有效指导天然气水合物勘探开发。为了克服这一限制，本研究引入了一种利用相变材料（PCM）的天然气水合物有效保温取心方法。设计并研制了主动保温罩（ATPC），建立了室内实验系统，对取心过程中的传热进行了研究。根据不同环境温度下的实验结果，建立了ATPC取心全过程的传热模型。室内实验结果与传热模型的理论预测一致，证实了模型的有效性。该模型重构了天然气水合物取心过程中岩心温度的变化，结果表明，与传统的被动保温取心方法相比，ATPC可有效降低岩心温度5.25℃以上。采用ATPC，在环境温度为15、20、25和30℃时，天然气水合物岩心低温状态持续时间分别为53.85、32.87、20.32和11.83 min。这些发现为天然气水合物保温岩心取样提供了新的思路，为天然气水合物勘探开发提供了技术支持。

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引用次数: 0

Coupling effect of size and strain rate on uniaxial compressive properties of coral reef limestone 尺寸和应变速率对珊瑚礁灰岩单轴压缩特性的耦合效应

IF 13.7 1区工程技术 Q1 MINING & MINERAL PROCESSING

International Journal of Mining Science and Technology

Pub Date : 2025-11-01 Epub Date: 2025-09-01 DOI: 10.1016/j.ijmst.2025.07.009

Hongya Li, Linjian Ma, Mingyang Wang, Jiawen Wu, Jiajun Deng, Zeng Li

As the main geomaterials for coral reefs oil or gas extraction and underground infrastructure construction, coral reef limestone demonstrates significantly distinct mechanical responses compared to terrigenous rocks. To investigate the mechanical behaviour of coral reef limestone under the coupling impact of size and strain rate, the uniaxial compression tests were conducted on reef limestone samples with length-to-diameter (L/D) ratio ranging from 0.5 to 2.0 at strain rate ranging from 10⁻⁵·s⁻¹ to 10⁻²·s⁻¹. It is revealed that the uniaxial compressive strength (UCS) and residual compressive strength (RCS) of coral reef limestone exhibits a decreasing trend with L/D ratio increasing. The dynamic increase factor (DIF) of UCS is linearly correlated with the logarithm of strain rate, while increasing the L/D ratio further enhances the DIF. The elastic modulus increases with strain rate or L/D ratio increasing, whereas the Poisson’s ratio approximates to a constant value of 0.24. The failure strain increases with strain rate increasing or L/D ratio decreasing, while the increase in L/D ratio will inhibit the enhancing effect of the strain rate. The high porosity and low mineral strength are the primary factors contributing to a high RCS of 16.7%–64.9% of UCS, a lower brittleness index and multiple irregular fracture planes. The failure pattern of coral reef limestone transits from the shear-dominated to the splitting-dominated failure with strain rate increasing or L/D ratio decreasing, which is mainly governed by the constrained zones induced by end friction and the strain rate-dependent crack propagation. Moreover, a predictive formula incorporating coupling effect of size and strain rate for the UCS of reef limestone was established and verified to effectively capture the trend of UCS.

珊瑚礁灰岩作为珊瑚礁油气开采和地下基础设施建设的主要岩土材料，其力学响应与陆源岩石有着明显的差异。为了研究尺寸和应变速率耦合影响下珊瑚礁灰岩的力学行为，对长径比（L/D）为0.5 ~ 2.0、应变速率为10−5·s−1 ~ 10−2·s−1的珊瑚礁灰岩试样进行了单轴压缩试验。结果表明：随着L/D比的增大，珊瑚礁灰岩的单轴抗压强度（UCS）和残余抗压强度（RCS）呈减小趋势；UCS的动态增加因子（DIF）与应变速率的对数呈线性相关，而L/D比的增加进一步提高了DIF。弹性模量随应变率或L/D比的增大而增大，泊松比接近于恒定值0.24。破坏应变随应变速率的增大或L/D比的减小而增大，而L/D比的增大会抑制应变速率的增强作用。孔隙率高、矿物强度低是导致岩石破碎强度RCS值高（16.7% ~ 64.9%）、脆性指数低、破碎面多且不规则的主要原因。珊瑚礁灰岩的破坏模式随着应变率的增大或L/D比的减小，由剪切为主向劈裂为主过渡，主要受端部摩擦形成的约束区和应变率相关的裂纹扩展控制。建立并验证了考虑尺寸和应变速率耦合效应的礁灰岩单轴蠕变预测公式，可有效捕捉单轴蠕变趋势。

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引用次数: 0

Comparative modelling of retrogressive landslide runout: 2D and 3D random large-deformation analyses using coupled Eulerian-Lagrangian method 退行性滑坡跳变的比较建模：基于耦合欧拉-拉格朗日方法的二维和三维随机大变形分析

IF 13.7 1区工程技术 Q1 MINING & MINERAL PROCESSING

International Journal of Mining Science and Technology

Pub Date : 2025-11-01 Epub Date: 2025-11-04 DOI: 10.1016/j.ijmst.2025.10.002

Xuejian Chen , Shunping Ren , Xingsen Guo , Yueying Wang , Fei Liu , Hoang Nguyen , Rita Leal Sousa

Retrogressive landslides in sensitive clays pose significant risks to nearby infrastructure, as natural toe erosion or localized disturbances can trigger progressive block failures. While prior studies have largely relied on two-dimensional (2D) large-deformation analyses, such models overlook key three-dimensional (3D) failure mechanisms and variability effects. This study develops a 3D probabilistic framework by integrating the Coupled Eulerian–Lagrangian (CEL) method with random field theory to simulate retrogressive landslides in spatially variable clay. Using Monte Carlo simulations, we compare 2D and 3D random large-deformation models to evaluate failure modes, runout distances, sliding velocities, and influence zones. The 3D analyses captured more complex failure modes—such as lateral retrogression and asynchronous block mobilization across slope width. Additionally, the 3D analyses predict longer mean runout distances (13.76 vs. 11.92 m), wider mean influence distance (11.35 vs. 8.73 m), and higher mean sliding velocities (4.66 vs. 3.94 m/s) than their 2D counterparts. Moreover, 3D models exhibit lower coefficients of variation (e.g., 0.10 for runout distance) due to spatial averaging across slope width. Probabilistic hazard assessment shows that 2D models significantly underpredict near-field failure probabilities (e.g., 48.8% vs. 89.9% at 12 m from the slope toe). These findings highlight the limitations of 2D analyses and the importance of multi-directional spatial variability for robust geohazard assessments. The proposed 3D framework enables more realistic prediction of landslide mobility and supports the design of safer, risk-informed infrastructure.

在敏感粘土中，退行性滑坡对附近的基础设施构成重大风险，因为自然的趾部侵蚀或局部扰动可能引发渐进式块体破坏。虽然之前的研究主要依赖于二维（2D）大变形分析，但这些模型忽略了关键的三维（3D）破坏机制和变异性效应。本文将耦合欧拉-拉格朗日（CEL）方法与随机场理论相结合，建立了一个三维概率框架，用于模拟空间可变粘土中的退行性滑坡。使用蒙特卡罗模拟，我们比较了2D和3D随机大变形模型，以评估失效模式、跳动距离、滑动速度和影响区域。三维分析捕获了更复杂的破坏模式，如横向倒退和沿坡宽的异步块体移动。此外，与2D分析相比，3D分析预测的平均跳动距离更长（13.76米对11.92米），平均影响距离更宽（11.35米对8.73米），平均滑动速度更高（4.66米对3.94米/秒）。此外，由于坡宽的空间平均，3D模型表现出较低的变异系数（例如，跳动距离为0.10）。概率危害评估显示，2D模型明显低估了近场破坏概率（例如，距离坡脚12 m处48.8% vs 89.9%）。这些发现突出了二维分析的局限性，以及多向空间变异性对稳健的地质灾害评估的重要性。提出的3D框架能够更真实地预测滑坡的流动性，并支持设计更安全、风险知情的基础设施。

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引用次数: 0

Guest editorial to the special issue deep-sea mining and environmental protection 特刊《深海采矿与环境保护》特刊客座社论

IF 13.7 1区工程技术 Q1 MINING & MINERAL PROCESSING

International Journal of Mining Science and Technology

Pub Date : 2025-11-01 Epub Date: 2025-11-21 DOI: 10.1016/j.ijmst.2025.11.005

Xingsen Guo , Xiaolei Liu , Yonggang Jia , Rita Leal Sousa , Dongfang Liang , Thorsten Stoesser , Eckart Meiburg

引用次数: 0

Synergistic exploitation of gas hydrates through surface seawater injection coupled with depressurization: Application and optimization in the South China Sea 海面注海水联合降压协同开采天然气水合物：在南海的应用与优化

IF 13.7 1区工程技术 Q1 MINING & MINERAL PROCESSING

International Journal of Mining Science and Technology

Pub Date : 2025-11-01 Epub Date: 2025-09-18 DOI: 10.1016/j.ijmst.2025.08.003

Yuxuan Li , Zhaobin Zhang , Rick Chalaturnyk , Shouding Li , Jianming He , Hang Bian , Xiao Li , Cheng Lu , Xuwen Qin

This study proposes and systematically evaluates an optimized integration of warm surface seawater injection with depressurization for the long-term exploitation of marine natural gas hydrates. By employing comprehensive multiphysics simulations guided by field data from hydrate production tests in the South China Sea, we pinpoint key operational parameters—such as injection rates, depths, and timings—that notably enhance production efficiency. The results indicate that a 3-phase hydrate reservoir transitions from a free-gas-dominated production stage to a hydrate-decomposition-dominated stage. Moderate warm seawater injection supplies additional heat during the hydrate decomposition phase, thereby enhancing stable production; however, excessively high injection rates can impede the depressurization process. Only injection at an appropriate depth simultaneously balances thermal supplementation and the pressure gradient, leading to higher overall productivity. A “depressurization-driven sensible-heat supply window” is introduced, highlighting that timely seawater injection following initial depressurization prolongs reservoir dissociation dynamics. In this study area, commencing seawater injection at 170 d of depressurization proved optimal. This optimized integration leverages clean and renewable thermal energy, providing essential insights into thermal supplementation strategies with significant implications for sustainable, economically feasible, and efficient commercial-scale hydrate production.

本研究提出并系统评价了面向海洋天然气水合物长期开发的暖面海水注入与降压一体化优化方案。通过在南海水合物生产测试现场数据的指导下，采用全面的多物理场模拟，我们确定了关键的操作参数，如注入速度、深度和时间，这些参数显著提高了生产效率。结果表明，三相水合物储层由游离气为主的生产阶段过渡到水合物分解为主的阶段。注入中温海水可在水合物分解阶段提供额外热量，从而提高稳定产量；然而，过高的注入速度会阻碍降压过程。只有在适当的深度注入，才能同时平衡热补充和压力梯度，从而提高整体产能。介绍了“降压驱动的显热供应窗口”，强调在初始降压后及时注入海水延长了储层分离动力学。在本研究区，在降压170 d时开始注入海水是最优的。这种优化的集成利用了清洁和可再生的热能，为热补充策略提供了重要的见解，对可持续、经济可行和高效的商业规模的水合物生产具有重要意义。

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引用次数: 0

Potential failure mechanism of low–angle submarine landslides in shelf–slope break of Pearl River Mouth Basin, South China Sea 南海珠江口盆地陆架坡口低角度海底滑坡潜在破坏机制

IF 13.7 1区工程技术 Q1 MINING & MINERAL PROCESSING

International Journal of Mining Science and Technology

Pub Date : 2025-11-01 Epub Date: 2025-11-04 DOI: 10.1016/j.ijmst.2025.09.009

Zhenghui Li , Cong Hu , Geetanjali Kishan Lohar , Xiujuan Wang , Duanxin Chen , Hanlu Liu , Devendra Narain Singh , Chaoqi Zhu , Yonggang Jia

Low–angle submarine landslides pose a greater threat to offshore infrastructure compared to those with steep sliding angles. Understanding the preparation and triggering mechanism of these low–angle submarine landslides remains a significant challenge. This study focuses on a deformed low–angle submarine landslide in the shelf–slope break of the Pearl River Mouth Basin, South China Sea, integrating sedimentology, geophysics, and geotechnology to investigate potential failure mechanisms. The architecture and deformation characteristics of the submarine landslide were elucidated by analyzing multibeam and seismic data. Within the context of the regional geological history and tectonic framework, this study focuses on the factors (e.g., rapid sedimentation, fluid activity, and earthquakes) that potentially contributed to the submarine slope failure. Furthermore, a series of stability evaluations considering the effects of rapid sedimentation and earthquakes was conducted. Our findings indicate that the most probable triggering mechanism involves the combined effects of sedimentation controlled by sea–level fluctuations, high–pressure gas activity, and seismic events. The high–pressure gas, which acts as a long–term preconditioning factor by elevating pore pressures and reducing shear resistance within the sediment, accumulated beneath the upper and middle sections of the low–permeability stratum that was formed during sea–level rise and ultimately evolved into the sliding mass. The overpressure generated by gas accumulation predisposed the submarine slope to instability, and a frequent or moderate earthquake ultimately initiated local failure. This study enhances the mechanistic understanding of low–angle slope failures in the shelf–slope break zone and provides critical insights for assessing marine hazard risks.

低角度海底滑坡比大角度海底滑坡对海上基础设施的威胁更大。了解这些低角度海底滑坡的准备和触发机制仍然是一个重大挑战。本文以南海珠江口盆地陆架坡折处的一个变形低角度海底滑坡为研究对象，综合运用沉积学、地球物理和岩土技术等方法，探讨其潜在的破坏机制。通过对多波束和地震资料的分析，阐明了海底滑坡的结构和变形特征。在区域地质历史和构造框架的背景下，本研究侧重于可能导致海底斜坡破坏的因素（例如，快速沉积，流体活动和地震）。此外，还进行了一系列考虑快速沉积和地震影响的稳定性评价。我们的研究结果表明，最可能的触发机制包括海平面波动控制的沉积、高压气体活动和地震事件的综合作用。在海平面上升过程中形成的低渗透地层中，高压气体通过提高孔隙压力和降低沉积物内部的剪切阻力，起到了长期的预处理作用，积聚在中上段地层下方，最终演变成滑动体。天然气聚集产生的超压使海底斜坡易失稳，频繁或中度地震最终引发局部破坏。该研究增强了对陆架坡折带低角度边坡破坏的机理理解，并为评估海洋灾害风险提供了重要见解。

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引用次数: 0

Sparse pipeline wall information-based data-driven reconstruction for solid–liquid two-phase flow in flexible vibrating pipelines 基于稀疏管壁信息的柔性振动管道固液两相流数据驱动重构

IF 13.7 1区工程技术 Q1 MINING & MINERAL PROCESSING

International Journal of Mining Science and Technology

Pub Date : 2025-11-01 Epub Date: 2025-09-30 DOI: 10.1016/j.ijmst.2025.07.011

Shengpeng Xiao , Chuyi Wan , Hongbo Zhu , Dai Zhou , Juxi Hu , Mengmeng Zhang , Yuankun Sun , Yan Bao , Ke Zhao

Deep-sea mineral resource transportation predominantly utilizes hydraulic pipeline methodology. Environmental factors induce vibrations in flexible pipelines, thereby affecting the internal flow characteristics. Therefore, real-time monitoring of solid–liquid two-phase flow in pipelines is crucial for system maintenance. This study develops an autoencoder-based deep learning framework to reconstruct three-dimensional solid–liquid two-phase flow within flexible vibrating pipelines utilizing sparse wall information from sensors. Within this framework, separate X-model and F-model with distinct hidden-layer structures are established to reconstruct the coordinates and flow field information on the computational domain grid of the pipeline under traveling wave vibration. Following hyperparameter optimization, the models achieved high reconstruction accuracy, demonstrating R² values of 0.990 and 0.945, respectively. The models’ robustness is evaluated across three aspects: vibration parameters, physical fields, and vibration modes, demonstrating good reconstruction performance. Results concerning sensors show that 20 sensors (0.06% of total grids) achieve a balance between accuracy and cost, with superior accuracy obtained when arranged along the full length of the pipe compared to a dense arrangement at the front end. The models exhibited a signal-to-noise ratio tolerance of approximately 27 dB, with reconstruction accuracy being more affected by sensor failures at both ends of the pipeline.

深海矿产资源运输主要采用液压管道方法。环境因素引起柔性管道振动，从而影响管道内部流动特性。因此，实时监测管道中固液两相流动对系统维护至关重要。本研究开发了一种基于自编码器的深度学习框架，利用传感器的稀疏壁信息重建柔性振动管道内的三维固液两相流。在此框架下，分别建立具有不同隐层结构的x模型和f模型，在行波振动计算域网格上重建管道的坐标和流场信息。模型经过超参数优化后，重建精度较高，R2值分别为0.990和0.945。从振动参数、物理场和振动模式三个方面对模型的鲁棒性进行了评价，显示出良好的重建性能。关于传感器的结果表明，20个传感器（占总网格的0.06%）在精度和成本之间取得了平衡，沿管道全长排列比在前端密集排列获得了更高的精度。该模型的信噪比容忍度约为27 dB，重建精度受管道两端传感器故障的影响更大。

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引用次数: 0

Prediction of lost circulation risk in fractured formations based on 3D geomechanical modeling 基于三维地质力学模型的裂缝性地层漏失风险预测

IF 13.7 1区工程技术 Q1 MINING & MINERAL PROCESSING

International Journal of Mining Science and Technology

Pub Date : 2025-11-01 Epub Date: 2025-10-04 DOI: 10.1016/j.ijmst.2025.08.008

Jinfa Zhang , Yongcun Feng , Sijia Ma , Zhijuan Hao , Bing He , Jingyi Wei , Jingen Deng

Due to complex geological structures and a narrow safe mud density window, offshore fractured formations frequently encounter severe lost circulation (LC) during drilling, significantly hindering oil and gas exploration and development. Predicting LC risks enables the targeted implementation of mitigation strategies, thereby reducing the frequency of such incidents. To address the limitations of existing 3D geomechanical modeling in predicting LC, such as arbitrary factor selection, subjective weight assignment, and the inability to achieve pre-drilling prediction along the entire well section, an improved prediction method is proposed. This method integrates multi-source data and incorporates three LC-related sensitivity factors: fracture characteristics, rock brittleness, and in-situ stress conditions. A quantitative risk assessment model for LC is developed by combining the subjective analytic hierarchy process with the objective entropy weight method (EWM) to assign weights. Subsequently, 3D geomechanical modeling is applied to identify regional risk zones, enabling digital visualization for pre-drilling risk prediction. The developed 3D LC risk prediction model was validated using actual LC incidents from drilled wells. Results were generally consistent with field-identified LC zones, with an average relative error of 19.08%, confirming its reliability. This method provides practical guidance for mitigating potential LC risks and optimizing drilling program designs in fractured formations.

由于复杂的地质构造和狭窄的安全泥浆密度窗口，海上裂缝地层在钻井过程中经常遇到严重的漏失（LC），严重阻碍了油气勘探开发。预测LC风险能够有针对性地实施缓解战略，从而减少此类事件的发生频率。针对现有三维地质力学模型在LC预测中的局限性，如任意因素选择、主观权重分配以及无法实现整个井段的钻前预测等，提出了一种改进的预测方法。该方法集成了多源数据，并结合了三个与lc相关的敏感因素：裂缝特征、岩石脆性和地应力条件。将主观层次分析法与客观熵权法（EWM）相结合，建立了LC风险定量评估模型。随后，应用三维地质力学建模来识别区域风险区域，实现钻井前风险预测的数字化可视化。开发的3D LC风险预测模型通过实际钻井的LC事件进行了验证。结果与现场LC区基本一致，平均相对误差为19.08%，验证了方法的可靠性。该方法为降低潜在的LC风险和优化压裂地层的钻井方案设计提供了实用指导。

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引用次数: 0

Slurry infiltration characteristics of coral reef limestone based on infiltration column tests and CT scanning 基于入渗柱试验和CT扫描的珊瑚礁灰岩浆体入渗特征

IF 13.7 1区工程技术 Q1 MINING & MINERAL PROCESSING

International Journal of Mining Science and Technology

Pub Date : 2025-11-01 Epub Date: 2025-11-04 DOI: 10.1016/j.ijmst.2025.09.010

Jiahe Bai , Xin Huang

Reef limestone is buried in the continental shelf and marine environment. Understanding the mechanisms governing filter cake formation in coral reef limestone strata is essential for various engineering activities in coastal areas, including slurry pressure balanced (SPB) shield tunneling, which are currently not well understood. This study systematically investigates the slurry infiltration characteristics of different coral reef limestone types with inherent anisotropy, identified by growth line orientations, through a series of micro-infiltration column tests. Multiple slurry concentrations and pressures were used to analyze their effects on slurry infiltration dynamics and filter cake formation. Pre- and post-infiltration CT scanning was conducted to examine skeletal morphology and reconstruct the pore network structure of coral reef limestone samples. The results show that while increased slurry concentrations and pressures generally improve filter cake formation, excessive pressure can compromise filter cake integrity. By employing Dijkstra’s algorithm in a pore network model, the study identified primary seepage pathways, highlighting the significant role of near-vertical throat clusters in the infiltration process. A comprehensive analysis of pore structure and connectivity indices before and after infiltration revealed that the orientation of growth lines in coral reef limestone is the primary factor influencing macroscopic slurry infiltration behavior. These findings offer valuable insights for the design and execution of tunneling projects through coral reef limestone formations, especially in coastal regions.

礁灰岩是埋藏在大陆架和海洋环境中的。了解珊瑚礁灰岩地层中滤饼形成的机制对于沿海地区的各种工程活动至关重要，包括目前尚未完全了解的泥浆压力平衡（SPB）盾构隧道。本研究通过一系列微入渗柱试验，系统研究了不同类型珊瑚礁灰岩的浆体入渗特性，它们具有固有的各向异性，由生长线取向识别。采用不同的料浆浓度和压力，分析了不同浓度和压力对料浆入渗动力学和滤饼形成的影响。通过浸润前和浸润后CT扫描检测珊瑚礁灰岩样品的骨骼形态，重建其孔隙网络结构。结果表明，虽然泥浆浓度和压力的增加通常会改善滤饼的形成，但过高的压力会损害滤饼的完整性。通过在孔隙网络模型中使用Dijkstra算法，研究确定了主要的渗流路径，突出了近垂直喉道簇在入渗过程中的重要作用。综合分析入渗前后孔隙结构和连通性指标，发现珊瑚礁灰岩生长线的取向是影响宏观浆液入渗行为的主要因素。这些发现为设计和实施穿越珊瑚礁石灰岩地层的隧道工程提供了宝贵的见解，特别是在沿海地区。

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引用次数: 0

Multiscale track-seabed dynamic interaction during deep-sea seabed mining across operational modes 跨作业模式深海海底采矿多尺度轨道-海底动力相互作用

IF 13.7 1区工程技术 Q1 MINING & MINERAL PROCESSING

International Journal of Mining Science and Technology

Pub Date : 2025-11-01 Epub Date: 2025-11-11 DOI: 10.1016/j.ijmst.2025.10.007

Bin Zhu , Xianhao Xiu , Ying Lai , Yunmin Chen , Viroon Kamchoom , Anthony Gunawan , Ruishi Zhang , Shusen Xiong

Deep-sea mining has emerged as a critical solution to address global resource shortages; however, the mechanical interaction between tracked mining vehicles (TMVs) and soft seabed sediments presents fundamental engineering challenges. This study establishes a multiscale modelling framework coupling the discrete element method (DEM) with multi-body dynamics (MBD) to investigate track-seabed dynamic interactions across three operational modes: flat terrain, slope climbing, and ditch surmounting. The simulation framework, validated against laboratory experiments, systematically evaluates the influence of grouser geometry (involute, triangular, and pin-type) and traveling speed (0.2–1.0 m/s) on traction performance, slip rate, and ground pressure distribution. Results reveal rate-dependent traction mechanisms governed by soil microstructural responses: higher speeds enhance peak traction but exacerbate slip instability on complex terrain. Critical operational thresholds are established—0.7 m/s for flat terrain, ≤0.5 m/s for slopes and ditches—with distinct grouser optimization strategies: involute grousers achieve 35%–40% slip reduction on slopes through progressive soil engagement, while triangular grousers provide optimal impact resistance during ditch crossing with 30%–35% performance improvement. These findings provide quantitative design criteria and operational guidelines for optimizing TMV structural parameters and control strategies, offering a robust theoretical foundation for enhancing the performance, safety, and reliability of deep-sea mining equipment in complex submarine environments.

深海采矿已成为解决全球资源短缺的关键解决方案；然而，履带式采矿车（tmv）与海底软沉积物之间的力学相互作用提出了根本性的工程挑战。本研究建立了一个将离散元法（DEM）与多体动力学（MBD）相结合的多尺度建模框架，研究了平坦地形、爬坡和翻沟三种运行模式下的轨道-海底动力相互作用。仿真框架通过实验室实验验证，系统地评估了滑车几何形状（渐开线、三角形和销型）和行驶速度（0.2-1.0 m/s）对牵引性能、滑移率和地压分布的影响。结果揭示了由土壤微观结构响应控制的速率依赖的牵引机制：较高的速度增强了峰值牵引力，但加剧了复杂地形上的滑移不稳定性。制定了关键的运行阈值-平坦地形为0.7 m/s，斜坡和沟渠为≤0.5 m/s -并采用不同的grogroer优化策略：渐开线grogroer通过逐步接触土壤可减少35%-40%的斜坡滑动，而三角形grogroer在沟渠穿越过程中提供最佳的抗冲击性，性能提高30%-35%。这些研究结果为优化TMV结构参数和控制策略提供了定量设计准则和操作指南，为提高复杂海底环境下深海采矿设备的性能、安全性和可靠性提供了坚实的理论基础。

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引用次数: 0