International Journal of Mining Science and Technology最新文献

{"title":"Design, test, and verification of in-situ condition preserved coring and analysis system in lunar-based simulation environment","authors":"Haichun Hao,&nbsp;Mingzhong Gao,&nbsp;Yan Wu,&nbsp;Zheng Gao,&nbsp;Yongcheng Li,&nbsp;Xuemin Zhou,&nbsp;Peng Chu,&nbsp;Xuan Wang,&nbsp;Jiahua Li,&nbsp;Lang Zhou,&nbsp;Jie Song,&nbsp;Tianxiang Ao,&nbsp;Yikun Yang","doi":"10.1016/j.ijmst.2024.09.001","DOIUrl":"10.1016/j.ijmst.2024.09.001","url":null,"abstract":"<div><div>The lunar surface and its deep layers contain abundant resources and valuable information resources, the exploration and exploitation of which are important for the sustainable development of the human economy and society. Technological exploration and research in the field of deep space science, especially lunar-based exploration, is a scientific strategy that has been pursued in China and worldwide. Drilling and sampling are key to accurate exploration of the desirable characteristics of deep lunar resources. In this study, an in-situ condition preserved coring (ICP-Coring) and analysis system, which can be used to test drilling tools and develop effective sampling strategies, was designed. The key features of the system include: (1) capability to replicate the extreme temperature fluctuations of the lunar environment (−185 to 200 °C) with intelligent temperature control; (2) ability to maintain a vacuum environment at a scale of 10⁻³ Pa, both under unloaded conditions within a <em>ϕ</em>580 mm × 1000 mm test chamber, and under loaded conditions using a <em>ϕ</em>400 mm × 800 mm lunar rock simulant; (3) application of axial pressures up to 4 MPa and confining pressures up to 3.5 MPa; (4) sample rotation at any angle with a maximum sampling length of 800 mm; and (5) multiple modes of rotary-percussive drilling, controlled by penetration speed and weight on bit (WOB). Experimental studies on the drilling characteristics in the lunar rock simulant-loaded state under different drill bit-percussive-vacuum environment configurations were conducted. The results show that the outgassing rate of the lunar soil simulant is greater than that of the lunar rock simulant and that a low-temperature environment contributes to a reduced vacuum of the lunar-based simulated environment. The rotary-percussive drilling method effectively shortens the sampling time. With increasing sampling depth, the temperature rise of the drilling tools tends to rapidly increase, followed by slow growth or steady fluctuations. The temperature rise energy accumulation of the drill bits under vacuum is more significant than that under atmospheric pressure, approximately 1.47 times higher. The real-time monitored drilling pressure, penetration speed and rotary torque during drilling serve as parameters for discriminating the drilling status. The results of this research can provide a scientific basis for returning samples from lunar rock in extreme lunar-based environments.</div></div>","PeriodicalId":48625,"journal":{"name":"International Journal of Mining Science and Technology","volume":"34 9","pages":"Pages 1259-1272"},"PeriodicalIF":11.7,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655788","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}

{"title":"Micromechanical testing and property upscaling of planetary rocks: A critical review","authors":"Yiwei Liu ,&nbsp;Guoping Zhang ,&nbsp;Jiangmei Qiao ,&nbsp;Xuhai Tang","doi":"10.1016/j.ijmst.2024.08.002","DOIUrl":"10.1016/j.ijmst.2024.08.002","url":null,"abstract":"<div><div>Knowledge of the mechanical behavior of planetary rocks is indispensable for space explorations. The scarcity of pristine samples and the irregular shapes of planetary meteorites make it difficult to obtain representative samples for conventional macroscale rock mechanics experiments (macro-RMEs). This critical review discusses recent advances in microscale RMEs (micro-RMEs) techniques and the upscaling methods for extracting mechanical parameters. Methods of mineralogical and microstructural analyses, along with non-destructive mechanical techniques, have provided new opportunities for studying planetary rocks with unprecedented precision and capabilities. First, we summarize several mainstream methods for obtaining the mineralogy and microstructure of planetary rocks. Then, nondestructive micromechanical testing methods, nanoindentation and atomic force microscopy (AFM), are detailed reviewed, illustrating the principles, advantages, influencing factors, and available testing results from literature. Subsequently, several feasible upscaling methods that bridge the micro-measurements of meteorite pieces to the strength of the intact body are introduced. Finally, the potential applications of planetary rock mechanics research to guiding the design and execution of space missions are environed, ranging from sample return missions and planetary defense to extraterrestrial construction. These discussions are expected to broaden the understanding of the microscale mechanical properties of planetary rocks and their significant role in deep space exploration.</div></div>","PeriodicalId":48625,"journal":{"name":"International Journal of Mining Science and Technology","volume":"34 9","pages":"Pages 1217-1241"},"PeriodicalIF":11.7,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655794","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}

{"title":"A novel molybdenite depressant for efficient selective flotation separation of chalcopyrite and molybdenite","authors":"Mengyao Qi ,&nbsp;Weijun Peng ,&nbsp;Wei Wang ,&nbsp;Yijun Cao ,&nbsp;Longyu Zhang ,&nbsp;Yukun Huang","doi":"10.1016/j.ijmst.2024.08.009","DOIUrl":"10.1016/j.ijmst.2024.08.009","url":null,"abstract":"<div><div>A novel small molecule depressant (M-DEP) was used to separate chalcopyrite and molybdenite via flotation. The results showed that M-DEP had an excellent selective depression on molybdenite, while had little effect on the flotation of chalcopyrite. The adsorption capacity of M-DEP on the surface of molybdenite was greater than that on chalcopyrite surface. The adsorption of M-DEP reduced the floatability of molybdenite and had less effect on the floatability of chalcopyrite, which was due to its different adsorption modes on the surface of the two minerals. Furthermore, the interaction between chalcopyrite and M-DEP was mainly chemical interaction, and almost all of the adsorbed M-DEP molecules were removed and replaced by sodium butyl xanthate (SBX). By contrast, hydrophobic interaction was the main way in which M-DEP was adsorbed on the molybdenite surface with little chemical interaction, which was less interfered by SBX addition. Therefore, M-DEP had a super selective depression on molybdenite. The study provided a novel depressant and approach for the deep separation of chalcopyrite and molybdenite via flotation.</div></div>","PeriodicalId":48625,"journal":{"name":"International Journal of Mining Science and Technology","volume":"34 8","pages":"Pages 1179-1196"},"PeriodicalIF":11.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527720","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}

{"title":"Multistage hydraulic fracturing of a horizontal well for hard roof related coal burst control: Insights from numerical modelling to field application","authors":"Jiaxin Zhuang ,&nbsp;Zonglong Mu ,&nbsp;Wu Cai ,&nbsp;Hu He ,&nbsp;Lee J. Hosking ,&nbsp;Guojun Xi ,&nbsp;Biao Jiao","doi":"10.1016/j.ijmst.2024.08.008","DOIUrl":"10.1016/j.ijmst.2024.08.008","url":null,"abstract":"<div><div>Multistage hydraulic fracturing of horizontal wells (MFHW) is a promising technology for controlling coal burst caused by thick and hard roofs in China. However, challenges remain regarding the MFHW control mechanism of coal burst and assessment of the associated fracturing effects. In this study, these challenges were investigated through numerical modelling and field applications, based on the actual operating parameters of MFHW for hard roofs in a Chinese coal mine. A damage parameter (<em>D</em>) is proposed to assess the degree of hydraulic fracturing in the roof. The mechanisms and effects of MFHW for controlling coal burst are analyzed using microseismic (MS) data and front-abutment stress distribution. Results show that the degree of fracturing can be categorized into lightly-fractured (<em>D</em>≤0.3), moderately fractured (0.3&lt;<em>D</em>≤0.6), well-fractured (0.6&lt;<em>D</em>≤0.9), and over-fractured (0.9&lt;<em>D</em>≤0.95). A response stage in the fracturing process, characterized by a slowdown in crack development, indicates the transition to a well-fractured condition. After MFHW, the zone range and peak value of the front-abutment stress decrease. Additionally, MS events shift from near the coal seam to the fractured roof layers, with the number of MS events increases while the average MS energy decreases. The MFHW control mechanisms of coal bursts involve mitigating mining-induced stress and reducing seismic activity during longwall retreat, ensuring stresses remain below the ultimate stress level. These findings provide a reference for evaluating MFHW fracturing effects and controlling coal burst disasters in engineering.</div></div>","PeriodicalId":48625,"journal":{"name":"International Journal of Mining Science and Technology","volume":"34 8","pages":"Pages 1095-1114"},"PeriodicalIF":11.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527715","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}

{"title":"Electrochemistry and DFT study of galvanic interaction on the surface of monoclinic pyrrhotite (0 0 1) and galena (1 0 0)","authors":"Tingsheng Qiu ,&nbsp;Kaiwei Ding ,&nbsp;Huashan Yan ,&nbsp;Liu Yang ,&nbsp;Hao Wu ,&nbsp;Guanfei Zhao ,&nbsp;Xianhui Qiu","doi":"10.1016/j.ijmst.2024.07.010","DOIUrl":"10.1016/j.ijmst.2024.07.010","url":null,"abstract":"<div><div>The electrochemical interaction between galena and monoclinic pyrrhotite was investigated to examine its impact on the physical and chemical properties of the mineral micro-surface. This investigation employed techniques such as electrochemistry, metal ion stripping, X-ray photoelectron spectroscopy, and quantum chemistry. The electrochemical test results demonstrate that the galena surface in the electro-couple system exhibits a lower electrostatic potential and higher electrochemical activity compared to the monoclinic pyrrhotite surface, rendering it more susceptible to oxidation dissolution. Monoclinic pyrrhotite significantly amplifies the corrosion rate of the galena surface. Mulliken charge population calculations indicate that electrons are consistently transferred from galena to monoclinic pyrrhotite, with the number of electron transfers on the mineral surface increasing as the interaction distance decreases. The analysis of state density revealed a shift in the surface state density of galena towards lower energy levels, resulting in decreased reactivity and increased difficulty for the reagent to adsorb onto the mineral surface. Conversely, monoclinic pyrrhotite exhibited an opposite trend. The X-ray photoelectron spectroscopy (XPS) test results indicate that galvanic interaction leads to the formation of hydrophilic substances, PbS<em>_x</em>O<em>_y</em> and Pb(OH)₂, on the surface of galena. Additionally, the surface of monoclinic pyrrhotite not only adsorbs Pb²⁺ but also undergoes S⁰ formation, thereby augmenting its hydrophobic nature.</div></div>","PeriodicalId":48625,"journal":{"name":"International Journal of Mining Science and Technology","volume":"34 8","pages":"Pages 1151-1162"},"PeriodicalIF":11.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527718","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}

{"title":"IFC: Editorial","authors":"","doi":"10.1016/S2095-2686(24)00117-4","DOIUrl":"10.1016/S2095-2686(24)00117-4","url":null,"abstract":"","PeriodicalId":48625,"journal":{"name":"International Journal of Mining Science and Technology","volume":"34 8","pages":"Page IFC"},"PeriodicalIF":11.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527711","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}

{"title":"Extraction of the key infrared radiation temperature features concerning stress and crack evolution of loaded rocks","authors":"Wei Liu ,&nbsp;Liqiang Ma ,&nbsp;Michel Jaboyedoff ,&nbsp;Marc-Henri Derron ,&nbsp;Qiangqiang Gao ,&nbsp;Fengchang Bu ,&nbsp;Hai Sun","doi":"10.1016/j.ijmst.2024.08.003","DOIUrl":"10.1016/j.ijmst.2024.08.003","url":null,"abstract":"<div><div>The infrared radiation temperature (IRT) variation concerning stress and crack evolution of rocks is a critical focus in rock mechanics domain and engineering disaster warning. In this paper, a methodology to extract the key IRT features related to stress and crack evolution of loaded rocks is proposed. Specifically, the wavelet denoising and reconstruction in thermal image sequence (WDRTIS) method is employed to eliminate temporal noise in thermal image sequences. Subsequently, the adaptive partition temperature drift correction (APTDC) method is introduced to alleviate temperature drift. On this basis, the spatial noise correction method based on threshold segmentation and adaptive median filtering (OTSU-AMF) is proposed to extract the key IRT features associated with microcracks of loaded rocks. Following temperature drift correction, IRT provides an estimation of the thermoelastic factor in rocks, typically around 5.29×10⁻⁵ MPa⁻¹ for sandstones. Results reveal that the high-temperature concentrated region in cumulative thermal images of crack evolution (TICE) can elucidate the spatiotemporal evolution of localized damage. Additionally, heat dissipation of crack evolution (HDCE) acquired from TICE quantifies the progressive failure process of rocks. The proposed methodology enhances the reliability of IRT monitoring results and provides an innovative approach for conducting research in rock mechanics and monitoring engineering disasters.</div></div>","PeriodicalId":48625,"journal":{"name":"International Journal of Mining Science and Technology","volume":"34 8","pages":"Pages 1059-1081"},"PeriodicalIF":11.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527713","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}

{"title":"NMR-based analysis of the effect of moisture migration on sandstone pore structure under alternating wetting and drying conditions","authors":"Huasu Wang,&nbsp;Jing Bi,&nbsp;Yu Zhao,&nbsp;Chaolin Wang,&nbsp;Jiabao Ma","doi":"10.1016/j.ijmst.2024.07.014","DOIUrl":"10.1016/j.ijmst.2024.07.014","url":null,"abstract":"<div><div>The wetting-drying (W-D) cycle is a type of water–rock interaction. The pore structure of rock, such as shape, size, distribution and pore throat, affects fluid storage and transport. Fractal theory and experimental research on the evolution characteristics of pore damage during the wet-dry erosion process are highly important for determining W-D damage. The mass and velocity of liquid migration are related to the pore size, porosity, fluid properties, etc. Experimental data show that the water absorption quality and velocity in rocks decrease with the number of wet-dry cycles. At the same test time, the mass and velocity of the SI water absorption method are smaller than those of the FI method. Under these two conditions, the amount and rate of water absorption represent the degree of water–rock interaction. Considering the pore evolution during the wet-dry cycling, an equation describing the motion of liquid in porous media was derived based on the imbibition-type separation model. The experimental data are in excellent agreement with the calculated values of the model. Permeability characteristics can affect the area and degree of rock deterioration as well as the development rate of pores and microcracks. Based on the interaction between permeability and pores, quantitative analysis of the weakening process (local damage) of rocks under W-D cycles can provide good reference indicators for evaluating the stability of geotechnical engineering.</div></div>","PeriodicalId":48625,"journal":{"name":"International Journal of Mining Science and Technology","volume":"34 8","pages":"Pages 1135-1150"},"PeriodicalIF":11.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527717","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}

{"title":"A cleaner production strategy for acid mine drainage prevention of waste rock: A porphyry copper case","authors":"Yesica L. Botero ,&nbsp;Isabelle Demers ,&nbsp;Luis A. Cisternas ,&nbsp;Arnoldo Ávila ,&nbsp;Mostafa Benzaazoua","doi":"10.1016/j.ijmst.2024.07.012","DOIUrl":"10.1016/j.ijmst.2024.07.012","url":null,"abstract":"<div><div>An in-process technology approach is proposed to identify the source of acid mine drainage (AMD) generation and prevent its formation in a porphyry copper waste rock (WR). Adopting actions before stockpiling the WR enables the establishment of potential contaminants and predicts the more convenient method for AMD prevention. A WR sample was separated into size fractions, and the WR’s net acid-generating potential was quantified using chemical and mineralogical characterization. The diameter of physical locking of sulfides (DPLS) was determined, and the fractions below the DPLS were desulfurized using flotation. Finally, the WR fractions and tailing from the flotation test were submitted to acid-base accounting and weathering tests to evaluate their acid-generating potential. Results show that the WR’s main sulfide mineral is pyrite, and the DPLS was defined as 850 µm. A sulfide recovery of 91% was achieved using a combination of HydroFloat® and Denver cells for a size fraction lower than DPLS. No grinding was conducted. The results show that size fractions greater than DPLS and the desulfurized WR are unlikely to produce AMD. The outcomes show that in-processing technology can be a more proactive approach and an effective tool for avoiding AMD in a porphyry copper WR.</div></div>","PeriodicalId":48625,"journal":{"name":"International Journal of Mining Science and Technology","volume":"34 8","pages":"Pages 1163-1177"},"PeriodicalIF":11.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527719","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}

{"title":"A statistical damage-based constitutive model for shearing of rock joints in brittle drop mode","authors":"Xinrong Liu ,&nbsp;Peiyao Li ,&nbsp;Xueyan Guo ,&nbsp;Xinyang Luo ,&nbsp;Xiaohan Zhou ,&nbsp;Luli Miao ,&nbsp;Fuchuan Zhou ,&nbsp;Hao Wang","doi":"10.1016/j.ijmst.2024.08.007","DOIUrl":"10.1016/j.ijmst.2024.08.007","url":null,"abstract":"<div><div>Some rock joints exhibit significant brittleness, characterized by a sharp decrease in shear stress upon reaching the peak strength. However, existing models often fail to accurately represent this behavior and are encumbered by numerous parameters lacking clear mechanical significance. This study presents a new statistical damage constitutive model rooted in both damage mechanics and statistics, containing only three model parameters. The proposed model encompasses all stages of joint shearing, including the compaction stage, linear stage, plastic yielding stage, drop stage, strain softening stage, and residual strength stage. To derive the analytical expression of the constitutive model, three boundary conditions are introduced. Experimental data from both natural and artificial rock joints is utilized to validate the model, resulting in average absolute relative errors ranging from 3% to 8%. Moreover, a comparative analysis with established models illustrates that the proposed model captures stress drop and post-peak strain softening more effectively, with model parameters possessing clearer mechanical interpretations. Furthermore, parameter analysis is conducted to investigate the impacts of model parameters on the curves and unveil the relationship between these parameters and the mechanical properties of rock joints. Importantly, the proposed model is straightforward in form, and all model parameters can be obtained from direct shear tests, thus facilitating the utilization in numerical simulations.</div></div>","PeriodicalId":48625,"journal":{"name":"International Journal of Mining Science and Technology","volume":"34 8","pages":"Pages 1041-1058"},"PeriodicalIF":11.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527712","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}