International Journal of Mining Science and Technology最新文献_第4页

Characteristics and genomic mechanism of Absidia spinosa in inhibiting coal spontaneous combustion 苦参抑制煤自燃的特性及基因组机制

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

International Journal of Mining Science and Technology

Pub Date : 2026-01-01 DOI: 10.1016/j.ijmst.2025.10.004

Xuanmeng Dong , Botao Qin , Fusheng Wang , Xiangming Hu , Liwen Guo , Tiesheng Han

Early prevention and control of coal spontaneous combustion have emerged as a critical research area in coal mine safety. Due to their sustainability and environmental friendliness, microorganisms have gained attention. A filamentous fungus was collected in the coal mine and identified as Absidia spinosa. Results indicated that the mycelium effectively covered and repaired many coal pores. The oxygen consumption ratio of A. spinosa was higher in coal-containing environments than in coal-free conditions. The fungus significantly impacted aliphatic functional groups, disrupting bridging bonds and side chains connected to aromatic structures and reducing the relative content of CO bonds. Additionally, A. spinosa increases the ignition temperature by 25.34 °C. The total heat release was decreased by approximately 32.58 %, and the activation energies were increased. The genome of Absidia spinosa revealed genes related to oxygen consumption, small molecule degradation, and secretion of metabolic products, such as those annotated under GO ID: 0140657, etc. The pathways involved in the degradation of small organic molecules (e.g., ko00626, etc.), carbon fixation, and nitrogen cycling, all linked to coal decomposition. Through oxygen consumption and the alteration of coal-active structures, A. spinosa effectively inhibits CSC, providing an experimental basis for exploring eco-friendly biological control methods in the goaf.

煤矿自燃的早期防治已成为煤矿安全的一个重要研究领域。微生物因其可持续性和环境友好性而受到人们的关注。在某煤矿中采集到一种丝状真菌，经鉴定为棘Absidia。结果表明，该菌丝体有效地覆盖和修复了许多煤孔隙。含煤条件下刺棘草的耗氧量比无煤条件下高。真菌显著影响了脂肪族官能团，破坏了连接芳香结构的桥键和侧链，降低了CO键的相对含量。此外，刺麻还能提高25.34℃的点火温度。总放热量减少约32.58%，活化能提高。刺叶苦艾草的基因组揭示了与氧气消耗、小分子降解和代谢产物分泌相关的基因，如GO ID: 0140657注释的基因等。有机小分子（如ko00626等）的降解、固碳和氮循环的途径都与煤的分解有关。刺棘草通过耗氧和煤活性结构的改变，有效地抑制了CSC，为探索采空区生态友好型生物防治方法提供了实验依据。

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引用次数: 0

Long-term creep of Beishan granite under uniaxial compression 北山花岗岩单轴压缩长期蠕变研究

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

International Journal of Mining Science and Technology

Pub Date : 2026-01-01 DOI: 10.1016/j.ijmst.2025.10.009

Chunping Wang , Xingguang Zhao , Jianfeng Liu , Haiyang Zhang , Liang Chen , Hongsu Ma , Ju Wang

Investigations into the long-term creep behavior of Beishan granite in uniaxial compression were conducted. Four levels of axial stress (60, 70, 87, and 95 MPa) were applied to rock specimens. Contrasting with earlier research, the long-term creep data in this work present a substantial advancement in the time dimension. Except for the sample subjected to 60 MPa axial loading, which did not fail after a loading duration of 1650 d, the specimens under the other three stresses all failed after sustained constant loading durations of 1204, 1023, and 839 d, respectively. A lower envelope of driving stress-ratio for crystalline rocks was obtained, tending towards approximately 0.45 over an infinite time scale. According to the experimental results, as axial stress increases, both the axial strain accumulated in the transient creep process and the strain rate associated with steady-state creep deformation increase exponentially; however, the share of steady-state creep strain remains nearly constant at about 82.53 %. A novel damage-based creep model was put forward. It provides an enhanced depiction of the comprehensive creep process in rocks, notably improving the accuracy in forecasting the accelerated creep phase, which significantly impacts the long-term stability of engineering structures.

对北山花岗岩在单轴压缩下的长期蠕变行为进行了研究。对岩石试样施加了4个水平的轴向应力（60、70、87和95 MPa）。与早期的研究相比，本工作的长期蠕变数据在时间维度上有了实质性的进步。除60 MPa轴向加载试样在1650 d后未发生破坏外，其余三种应力作用下的试样均在1204、1023和839 d后发生破坏。结晶岩的驱动应力比包络较低，在无限时间尺度上趋向于约0.45。实验结果表明，随着轴向应力的增大，瞬态蠕变过程中累积的轴向应变和与稳态蠕变变形相关的应变率均呈指数增长；然而，稳态蠕变应变的份额几乎保持不变，约为82.53%。提出了一种新的基于损伤的蠕变模型。它增强了对岩石蠕变过程的全面描述，显著提高了预测加速蠕变阶段的准确性，这对工程结构的长期稳定性有重要影响。

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引用次数: 0

Theoretical investigation on the initiation and propagation behavior of dominant cracks in valley slopes 谷地边坡优势裂缝起裂与扩展特性的理论研究

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

International Journal of Mining Science and Technology

Pub Date : 2026-01-01 DOI: 10.1016/j.ijmst.2025.11.002

Xianlun Leng , Chuan Wang , Chengtang Wang , Zhanrong Zhang , Haibin Wang , Lan Cui , Kun Fang

The stability of rock slopes is frequently controlled by the initiation and propagation of inherent dominant cracks. This study systematically investigated these processes in valley slopes by combining fracture-mechanics analysis with transparent soil model tests. An analytical expression for the stress field at the dominant crack tip was derived from the slope stress distribution by superposing the corresponding stress intensity factors (SIFs). The theoretical predictions were then validated against observations from transparent soil model tests. The influences of slope angle (β), crack inclination angle (α), crack position parameter (b), and crack length parameter (h) on crack initiation and propagation were quantified. The results indicated that: (1) cracks at the slope crest tended to propagate in shear mode, and the shear crack initiation angle (θ_s) was approximately 8°. Cracks at the slope toe might propagate in either tensile or shear mode. (2) θ_s at the slope crest increased with β, b, and l, and decreased with α. The maximum change in θ_s induced by the considered parameters was approximately 30°. (3) The tensile crack initiation angle (θ_t) at the slop toe decreased with β, α, and l, while the influence of b was comparatively minor. The maximum change in θ_t caused by individual parameters ranged approximately from 25° to 60°. Predicted crack propagation modes and directions showed good agreement with experimental results. These findings provide theoretical guidance for stability assessments of valley slopes controlled by dominant crack propagation.

岩质边坡的稳定性往往受固有优势裂缝的起裂和扩展控制。本研究采用断裂力学分析和透明土模型试验相结合的方法，系统地研究了河谷边坡的这些过程。通过叠加相应的应力强度因子，导出了主裂纹尖端应力场的解析表达式。然后根据透明土壤模型试验的观察结果验证了理论预测。量化了坡角（β）、裂纹倾角（α）、裂纹位置参数(b)和裂纹长度参数(h)对裂纹萌生和扩展的影响。结果表明：(1)边坡顶部裂纹以剪切方式扩展，剪切裂纹起裂角（θs）约为8°；坡趾裂缝可能以拉伸或剪切两种方式扩展。(2)坡顶θs随β、b、l的增大而增大，随α的增大而减小。所考虑的参数引起的θs的最大变化约为30°。(3)坡趾处拉伸裂纹起裂角θt随β、α、l的增大而减小，b的影响较小。单个参数引起的θt的最大变化范围约为25°至60°。预测的裂纹扩展模式和方向与实验结果吻合较好。研究结果为优势裂纹扩展控制下的山谷边坡稳定性评价提供了理论指导。

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引用次数: 0

In-situ stress solution theory for borehole overcoring technique incorporating time-dependent effect of stress relief and its applications 考虑应力释放时变效应的钻孔覆盖技术地应力求解理论及其应用

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

International Journal of Mining Science and Technology

Pub Date : 2026-01-01 DOI: 10.1016/j.ijmst.2025.11.010

Daohong Xia , Shengjun Miao , Lianjun Chen , Yuan Li , Zejing Liu , Rongmin Zhang , Pengjin Yang , Pengcheng Li

In-situ stress is a key parameter for underground mine design and rock stability analysis. The borehole overcoring technique is widely used for in-situ stress measurement, but the rheological recovery deformation of rocks after stress relief introduces errors. To improve accuracy, this study proposes an in-situ stress solution theory that incorporates time-dependent stress relief effects. Triaxial stepwise loading-unloading rheological tests on granite and siltstone established quantitative relationships between instantaneous elastic recovery and viscoelastic recovery under different stress levels, confirming their impact on measurement accuracy. By integrating a dual-class elastic deformation recovery model, an improved in-situ stress solution theory was derived. Additionally, accounting for the nonlinear characteristics of rock masses, a determination method for time-dependent nonlinear mechanical parameters was proposed. Based on the CSIRO hollow inclusion strain cell, time-dependent strain correction equations and long-term confining pressure calibration equations were formulated. Finally, the proposed theory was successfully applied at one iron mine (736 m depth) in Xinjiang, China, and one coal mine (510 m depth) in Ningxia, China. Compared to classical theory, the calculated mean stress values showed accuracy improvements of 6.0% and 9.4%, respectively, validating the applicability and reliability of the proposed theory.

地应力是地下矿山设计和岩石稳定性分析的关键参数。钻孔复盖技术广泛应用于地应力测量，但应力解除后岩石的流变恢复变形存在误差。为了提高精度，本研究提出了一种考虑时变应力释放效应的地应力求解理论。花岗岩和粉砂岩三轴分步加卸载流变试验建立了不同应力水平下瞬时弹性恢复和粘弹性恢复的定量关系，证实了它们对测量精度的影响。结合双级弹性变形恢复模型，推导了改进的地应力求解理论。此外，考虑到岩体的非线性特性，提出了一种时变非线性力学参数的确定方法。基于CSIRO中空夹杂应变单元，建立了随时间变化的应变修正方程和长期围压标定方程。最后，该理论在中国新疆的一个铁矿（深度736 m）和宁夏的一个煤矿（深度510 m）成功应用。与经典理论相比，计算得到的平均应力值精度分别提高了6.0%和9.4%，验证了所提理论的适用性和可靠性。

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引用次数: 0

Damage evolution and constitutive model of limestone with horizontal fissure under the coupled effects of dry-wet cycling and precompression stress 干湿循环和预压应力耦合作用下水平裂隙灰岩损伤演化及本构模型

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

International Journal of Mining Science and Technology

Pub Date : 2026-01-01 DOI: 10.1016/j.ijmst.2025.11.011

Shunbo Zhang , Zhongping Yang , Yang Gao , Miao Liu , Shanmeng Hou

To reveal the influence of coupled effects of dry-wet cycling and precompression stress (CEDWCPS) on the damage evolution of limestone with horizontal fissure (LHF), a series of degradation and uniaxial compression tests were conducted, and a corresponding piecewise damage constitutive model (PDCM) was established. We found that both dry-wet cycling and precompression stress deteriorate the physical properties, alter the microscopic characteristics, and reduce the mechanical properties of the LHF. These degradations are particularly pronounced under the CEDWCPS, although the magnitude of these changes gradually diminishes with the progression of dry-wet cycling. Meanwhile, they also reduce the deformation degree, prolong the micropore compaction stage, shorten the unstable crack propagation stage, lower the frequency and intensity of AE events, decrease the high-amplitude and high-frequency AE signals, enlarge crack scales, and shorten the crack initiation time. Among the changes of these indicators, the dry-wet cycling plays a dominant role. The crack types of LHF under the CEDWCPS (LHFCEDWCPS) are predominantly tensile cracks, supplemented by shear cracks. The failure mode can be defined as tensile-shear composite failure. Finally, the established PDCM effectively captures the nonlinear deformation of micropore and the linear deformation of the matrix in LHFCEDWCPS, with all corresponding R² consistently exceeding 0.97.

为了揭示干湿循环和预压应力耦合效应对水平裂缝石灰岩（LHF）损伤演化的影响，进行了一系列退化和单轴压缩试验，建立了相应的分段损伤本构模型（PDCM）。研究发现，干湿循环和预压应力均会使LHF的物理性能恶化，改变微观特征，降低力学性能。这些退化在CEDWCPS下尤为明显，尽管这些变化的幅度随着干湿循环的进展而逐渐减弱。同时，它们还降低了变形程度，延长了微孔压实阶段，缩短了不稳定裂纹扩展阶段，降低了声发射事件的频率和强度，减小了高振幅和高频声发射信号，扩大了裂纹尺度，缩短了裂纹起裂时间。在这些指标的变化中，干湿循环起主导作用。在CEDWCPS （LHFCEDWCPS）下，LHF的裂纹类型以拉伸裂纹为主，剪切裂纹为辅。破坏模式可定义为拉剪复合破坏。最后，所建立的PDCM有效地捕捉了LHFCEDWCPS中微孔的非线性变形和基质的线性变形，其对应的R2均大于0.97。

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引用次数: 0

Pull-out capacity and energy absorption of cable bolts under impact loading 冲击载荷下锚索螺栓的拉拔能力与能量吸收

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

International Journal of Mining Science and Technology

Pub Date : 2026-01-01 DOI: 10.1016/j.ijmst.2025.10.013

Adel Mottahedi , Naj Aziz , Alex Remennikov , Ali Mirzaghorbanali

This study investigates the performance of high-strength cable bolts under impact loading conditions representative of rock bursts in underground environments. Although widely used, the dynamic behaviour of these cable bolts has received limited experimental attention, and their effectiveness in seismically active zones remains a subject of ongoing debate. To address this gap, a reverse pull-out test machine integrated with a drop hammer rig was employed. Tests were conducted on 70-t SUMO bulbed and non-bulbed cable bolts with encapsulation lengths of 300 and 450 mm, subjected to an impact energy of 14.52 kJ. Results indicate that non-bulbed cables, despite showing lower initial peak loads (average 218 vs. 328 kN for bulbed cables at 300 mm encapsulation), demonstrated superior energy absorption (average 11.26 vs. 8.75 kJ) and displacement capacity (average 48.40 vs. 36.25 mm). Increasing the encapsulation length for bulbed cables led to a reduction in initial peak load but improved displacement and energy absorption. The dominant failure mechanism was debonding at the cable-grout interface, characterised by frictional sliding and cable rotation. These findings provide new insights into the energy dissipation mechanisms of cables and support the development of more resilient ground support systems for dynamically active conditions.

本文研究了以地下地压为代表的冲击载荷条件下高强锚杆的受力性能。尽管这些锚索锚杆得到了广泛的应用，但它们的动力特性却受到了有限的实验关注，而且它们在地震活跃区的有效性仍然是一个持续争论的主题。为了解决这一差距，采用了与落锤钻机集成的反向拉出试验机。在冲击能量为14.52 kJ的情况下，对封装长度为300和450 mm的70 t SUMO球泡和非球泡电缆螺栓进行了试验。结果表明，尽管非球泡电缆的初始峰值载荷较低（在300毫米封装下，球泡电缆的平均峰值载荷为218比328千牛），但其能量吸收（平均为11.26比8.75千牛）和驱油能力（平均为48.40比36.25千牛）更优越。增加球泡电缆的封装长度可以降低初始峰值载荷，但可以改善位移和能量吸收。锚索-浆液界面的主要破坏机制为脱粘，主要表现为锚索的摩擦滑动和旋转。这些发现为缆索的能量耗散机制提供了新的见解，并为动态活动条件下更具弹性的地面支撑系统的开发提供了支持。

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引用次数: 0

Spatial response and prediction model for blasting-induced vibration in a deep double-line tunnel 深埋双线隧道爆破诱发振动空间响应及预测模型

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

International Journal of Mining Science and Technology

Pub Date : 2026-01-01 DOI: 10.1016/j.ijmst.2025.11.009

Chong Yu , Yongan Ma , Haibo Li , Changjian Wang , Haibin Wang , Linghao Meng

Excessive blasting-induced vibration during drilling-and-blasting excavation of deep tunnels can trigger geological hazards and compromise the stability of both the rock mass and support structures. This study focused on the deep double-line Sejila Mountain tunnel to systematically analyze the spatial response of blasting-induced vibration and to develop a prediction model through field tests and numerical simulations. The results revealed that the presence of a cross passage significantly altered propagation paths and the spatial distribution of blasting-induced vibration velocity. The peak particle velocity (PPV) at the cross-passage corner was amplified by approximately 1.92 times due to wave reflection and geometric focusing. Blasting-induced vibration waves attenuated non-uniformly across the tunnel cross-section, where PPV on the blast-face side was 1.54–6.56 times higher than that on the opposite side. We propose an improved PPV attenuation model that accounts for the propagation path effect. This model significantly improved fitting accuracy and resolved anomalous parameter (k and α) estimates in traditional equations, thereby improving prediction reliability. Furthermore, based on the observed spatial distribution of blasting-induced vibration, optimal monitoring point placement and targeted vibration control measures for tunnel blasting were discussed. These findings provide a scientific basis for designing blasting schemes and vibration mitigation strategies in deep tunnels.

深埋隧道钻爆开挖过程中过大的爆破诱发振动会引发地质灾害，危及岩体和支护结构的稳定性。本研究以深埋双线世济拉山隧道为研究对象，通过现场试验和数值模拟，系统分析了爆破诱发振动的空间响应，建立了预测模型。结果表明，交叉通道的存在显著改变了爆破振动速度的传播路径和空间分布。由于波反射和几何聚焦的作用，通道转角的峰值粒子速度（PPV）放大了约1.92倍。爆破诱发振动波在巷道断面上呈不均匀衰减，其中爆面侧的PPV是对侧的1.54 ~ 6.56倍。我们提出了一个改进的PPV衰减模型，该模型考虑了传播路径效应。该模型显著提高了拟合精度，解决了传统方程中异常参数（k和α）的估计，从而提高了预测的可靠性。根据观测到的爆破诱发振动的空间分布，探讨了隧道爆破最佳监测点的布设和有针对性的振动控制措施。研究结果为深部隧道爆破方案设计和减振策略设计提供了科学依据。

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引用次数: 0

Quantifying and mapping the heterogeneity of rock joint roughness and shear strength for rapid field assessment 量化和绘制岩石节理粗糙度和抗剪强度的非均质性，用于快速现场评估

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

International Journal of Mining Science and Technology

Pub Date : 2026-01-01 DOI: 10.1016/j.ijmst.2025.11.008

Changshuo Wang, Chen Huang, Rui Yong, Guangjian Liu, Pengju An, Zhongjun Ma, Jibo Qin

Rock mass stability is significantly influenced by the heterogeneity of rock joint roughness and shear strength. While modern technology facilitates assessing roughness heterogeneity, evaluating shear strength heterogeneity remains challenging. To address this, this study first captures the morphology of large-scale (1000 mm × 1000 mm) slate and granite joints via 3D laser scanning. Analysis of these surfaces and corresponding push/pull tests on carved specimens revealed a potential correlation between the heterogeneity of roughness and shear strength. A comparative evaluation of five statistical metrics identified information entropy (H_s) as the most robust indicator for quantifying rock joint heterogeneity. Further analysis using H_s reveals that the heterogeneity is anisotropic and, critically, that shear strength heterogeneity is governed not only by roughness heterogeneity but is also significantly influenced by the mean roughness value, normal stress, and intact rock tensile strength. Consequently, a simple comparison of roughness H_s values is insufficient for reliably comparing shear strength heterogeneity. To overcome this limitation, a theoretical framework is developed to explicitly map fundamental roughness statistics (mean and heterogeneity) to shear strength heterogeneity. This framework culminates in a practical workflow that allows for the rapid, field-based assessment of shear strength heterogeneity using readily obtainable rock joint roughness data.

岩体节理粗糙度和抗剪强度的非均质性对岩体稳定性有显著影响。虽然现代技术有助于评估粗糙度非均质性，但评估抗剪强度非均质性仍然具有挑战性。为了解决这个问题，本研究首先通过3D激光扫描捕获了大型（1000 mm × 1000 mm）板岩和花岗岩接缝的形态。对这些表面进行分析，并对雕刻标本进行相应的推/拉试验，揭示了粗糙度的非均质性与抗剪强度之间的潜在相关性。通过对五种统计指标的比较评估，发现信息熵（Hs）是量化岩石节理非均质性的最可靠指标。利用Hs进一步分析表明，非均质性是各向异性的，重要的是，抗剪强度非均质性不仅受粗糙度非均质性的控制，还受到平均粗糙度值、正应力和完整岩石抗拉强度的显著影响。因此，简单比较粗糙度Hs值不足以可靠地比较抗剪强度非均质性。为了克服这一限制，开发了一个理论框架来明确地将基本粗糙度统计（平均值和非均质）映射到抗剪强度非均质。该框架最终形成了一个实用的工作流程，允许使用易于获得的岩石节理粗糙度数据快速、基于现场的抗剪强度非均质性评估。

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引用次数: 0

Experimental study on damage evolution and failure precursor characteristics of granite under thermal shock cycles 热冲击循环作用下花岗岩损伤演化及破坏前兆特征试验研究

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

International Journal of Mining Science and Technology

Pub Date : 2026-01-01 DOI: 10.1016/j.ijmst.2025.11.006

Zhenjiang Huang, Mingxuan Shen, Yu Zhao, Chaolin Wang, Jing Bi, Yongfa Zhang, Shuang Dang, Yuhang Zhao

Investigating the damage evolution of surrounding rock under thermal shock cycles is crucial for ensuring the stability of engineering rock masses. This study performed Brazilian splitting tests on granite specimens under varying temperature and cycle conditions, employing acoustic emission monitoring, digital image correlation, and three-dimensional scanning technology. A systematic analysis was conducted on the patterns of damage evolution, failure precursor, and response mechanisms under combined thermal and cyclic loading. Experimental results show that both P-wave velocity and tensile strength degrade significantly with increasing temperature and cycle count, with temperature having a more pronounced effect than cycle count. Notably, damage evolution exhibits a dual-threshold behavior in which degradation accelerates markedly above 400 °C and stabilizes after 5 thermal cycles. Fracture surfaces evolve from initially planar to rugged morphologies, with peak-valley height differences at 600 °C being approximately three times greater than those at 200 °C. Furthermore, based on acoustic emission energy entropy analysis, we introduce a novel failure precursor indicator where the sustained increase and critical surge in average entropy serve as reliable early-warning signals for impending rock failure. These findings establish a solid theoretical basis and practical methodology for damage assessment and instability early-warning systems in high-temperature rock engineering.

研究热冲击循环作用下围岩的损伤演化对保证工程岩体的稳定性具有重要意义。本研究采用声发射监测、数字图像相关和三维扫描技术，在不同温度和循环条件下对花岗岩试样进行了巴西劈裂试验。系统分析了热循环复合载荷作用下的损伤演化模式、破坏前兆及响应机制。实验结果表明，随着温度和循环次数的增加，纵波速度和拉伸强度均显著降低，且温度的影响比循环次数的影响更明显。值得注意的是，损伤演化表现出双阈值行为，在400℃以上降解明显加速，在5个热循环后趋于稳定。裂缝表面从最初的平面形态演变为崎岖形态，600°C时的峰谷高度差大约是200°C时的3倍。此外，在声发射能量熵分析的基础上，引入了一种新的破坏前兆指标，其中平均熵的持续增加和临界激增可作为岩石即将发生破坏的可靠预警信号。研究结果为高温岩石工程损伤评估和失稳预警系统的建立奠定了坚实的理论基础和实践方法。

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引用次数: 0

Towards sustainable lunar habitats with ISRU in Chang’E mission: Mechanical–energy evolution and damage mechanisms of LPBF-printed lunar regolith simulate 基于ISRU的可持续月球生境：lpbf打印的月球风化层模拟的机械能演化与破坏机制

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

International Journal of Mining Science and Technology

Pub Date : 2026-01-01 DOI: 10.1016/j.ijmst.2025.11.003

Sheng Li , Xinyi Li , Yuyue Gao , Bo Zhou , Yan Zhou , Jian Song , Cheng Zhou , Wei Yao , Lieyun Ding

Targeting Chang’E-8 mission’ in-situ resource utilization (ISRU) for sustainable lunar habitats, laser powder bed fusion (LPBF) provides a viable pathway for in-situ additive manufacturing of lunar regolith. To elucidate mission‑relevant mechanical behavior and failure mechanisms of LPBF‑fabricated lunar regolith simulants, mare‑type and highland‑type simulant specimens were produced. Microstructural characterization, mechanical test coupled with three-dimensional digital image correlation (3D-DIC), and an energy-dissipation framework were employed for comprehensive analysis. The pristine highland specimens achieved 5.79 MPa and a peak strain of 0.13 (50 mm × 50 mm × 30 mm), significantly outperforming their mare counterparts. Wire-cutting to 20 mm × 20 mm × 20 mm lowered strength by ∼ 20% and peak strain to 0.04, indicating cutting-induced defects reduce ductility. All specimens displayed multi-peaked stress–strain curves. 3D-DIC revealed band-type strain localization in pristine highland samples, diffuse strain patterns in cut highland samples, and highly tortuous, network-type bands in mare samples; the anisotropy index was also quantified. Fragmented particles exhibited fractal dimensions ranging from 1.6 to 2.0 (size 1.25–9 mm). Energy evolution progressed through three distinct stages: elastic energy storage, progressive energy dissipation delaying crack propagation, and final unstable collapse. An energy-based damage model was established and validated. The data and methods developed support Chang’E-8 missions’ ISRU demonstrations and establish a transferable framework toward sustainable lunar habitats.

针对嫦娥8号任务的原位资源利用（ISRU），激光粉末床融合（LPBF）为原位增材制造月球风化层提供了一条可行的途径。为了阐明LPBF制造的月球风化模拟物与任务相关的力学行为和破坏机制，制作了海型和高原型模拟样品。采用微观结构表征、力学试验耦合三维数字图像相关（3D-DIC）和耗能框架进行综合分析。原始高原标本的峰值应变为5.79 MPa，峰值应变为0.13 (50 mm × 50 mm × 30 mm)，显著优于母马标本。线切割至20mm × 20mm × 20mm时，强度降低约20%，峰值应变降至0.04，表明切割缺陷降低了延性。所有试样均呈现多峰应力-应变曲线。3D-DIC显示原始高原样品中的带状应变局部化，切割高原样品中的漫射应变模式，以及粗糙样品中高度曲折的网络型条带；各向异性指数也被量化。破碎颗粒的分形维数为1.6 ~ 2.0，粒径为1.25 ~ 9 mm。能量演化经历了三个不同的阶段：弹性能量储存阶段、能量逐步耗散延迟裂纹扩展阶段和最终不稳定破坏阶段。建立了基于能量的损伤模型并进行了验证。开发的数据和方法支持嫦娥8号任务的ISRU演示，并建立了一个可转移的框架，以实现可持续的月球栖息地。

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引用次数: 0