International Journal of Mining Science and Technology最新文献

{"title":"Combining first principles and machine learning for rapid assessment response of WO3 based gas sensors","authors":"Ran Zhang ,&nbsp;Guo Chen ,&nbsp;Shasha Gao ,&nbsp;Lu Chen ,&nbsp;Yongchao Cheng ,&nbsp;Xiuquan Gu ,&nbsp;Yue Wang","doi":"10.1016/j.ijmst.2024.12.001","DOIUrl":"10.1016/j.ijmst.2024.12.001","url":null,"abstract":"<div><div>The rapid advancement of gas sensitive properties in metal oxides is crucial for detecting hazardous gases in industrial and coal mining environments. However, the conventional experimental trial and error approach poses significant challenges and resource consumption for the high throughput screening of gas sensitive materials. Consequently, this paper introduced a novel screening approach that integrates first principles with machine learning (ML) to rapidly predict the gas sensitivity of materials. Initially, a comprehensive database of multi-physical parameters was established by modeling various adsorption sites on the surface of WO₃, which serves as a representative material. Since density functional theory (DFT) is one of the first principles, DFT calculations were conducted to derive essential multi-physical parameters, including bandgap, density of states (DOS), Fermi level, adsorption energy, and structural modifications resulting from adsorption. The collected data was subsequently utilized to develop a correlation model linking the multi-physical parameters to gas sensitive performance using intelligent algorithms. The model’s performance was assessed through receiver operating characteristic (ROC) curves, confusion matrices, and other evaluation metrics, ultimately achieving a prediction accuracy of 90% for identifying key features influencing gas adsorption performance. This proposed strategy for predicting the gas sensitive characteristics of materials holds significant potential for application in identifying additional gas sensitive properties across various materials.</div></div>","PeriodicalId":48625,"journal":{"name":"International Journal of Mining Science and Technology","volume":"34 12","pages":"Pages 1765-1772"},"PeriodicalIF":11.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929248","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)00179-4","DOIUrl":"10.1016/S2095-2686(24)00179-4","url":null,"abstract":"","PeriodicalId":48625,"journal":{"name":"International Journal of Mining Science and Technology","volume":"34 12","pages":"Page IFC"},"PeriodicalIF":11.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143239678","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":"Improving recovery in sublevel top coal caving mining by using partially reverse drawing technique","authors":"Jinwang Zhang ,&nbsp;Dongliang Cheng ,&nbsp;Jiachen Wang ,&nbsp;Shengli Yang ,&nbsp;Xiaohang Wan ,&nbsp;Xinyang Li","doi":"10.1016/j.ijmst.2024.11.010","DOIUrl":"10.1016/j.ijmst.2024.11.010","url":null,"abstract":"<div><div>The sublevel top coal caving (SLTCC) mining technology is extensively employed in steeply inclined thick coal seams. Because of the typical characteristics of the short coal face in this mining method, a significant portion of the top coal is lost at the face end. For reducing the coal loss, the partially reverse drawing technique (PRDT) is proposed as a novel top coal drawing technique. Meanwhile, based on the Bergmark-Roos model (B-R model), a theoretical method for calculating the recovery ratio of top coal based on the top coal boundary equation and residual top coal amount is proposed. The mechanism of PRDT to reduce top coal loss at the face end is revealed by comparing with single-round sequential drawing technique (SSDT). Physical experiments and in-site observation data were used to verify the theoretical model. The results show that PRDT can effectively reduce the amount of residual coal near the roof by optimizing the shape characteristics of top coal boundary. Suggestions for improve recovery ratio in Wudong Coal Mine were given based on its face parameters.</div></div>","PeriodicalId":48625,"journal":{"name":"International Journal of Mining Science and Technology","volume":"34 12","pages":"Pages 1655-1676"},"PeriodicalIF":11.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929242","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":"Flexible coal-derived carbon fibers via electrospinning for self-standing lithium-ion battery anodes","authors":"Baolin Xing ,&nbsp;Weibo Meng ,&nbsp;Hao Liang ,&nbsp;Weiwei Kang ,&nbsp;Huihui Zeng ,&nbsp;Chuanxiang Zhang ,&nbsp;Ishioma Laurene Egun ,&nbsp;Peng Li ,&nbsp;Yijun Cao ,&nbsp;Zhengfei Chen","doi":"10.1016/j.ijmst.2024.11.013","DOIUrl":"10.1016/j.ijmst.2024.11.013","url":null,"abstract":"<div><div>A series of flexible and self-standing coal-derived carbon fibers (CCFs) were fabricated through electrospinning coupled with carbonization using bituminous coal and polyacrylonitrile (PAN) as the carbon precursors. These CCFs were utilized as free-standing lithium-ion battery (LIB) anodes. Optimizing carbonization temperature reveals that the CCFs exhibit a one-dimensional solid linear structure with a uniform distribution of graphite-like microcrystals. These fibers possess a dense structure and smooth surface, with averaging diameter from approximately 125.0 to 210.0 nm at carbonization temperatures ranging from 600 to 900 °C. During electrospinning and carbonization, the aromatic rings enriched in bituminous coal crosslink with PAN chains, forming a robust three-dimensional (3D) framework. This 3D microstructure significantly enhances the flexibility and tensile strength of CCFs, while increasing the graphite-like sp² microcrystalline carbon content, thus improving electrical conductivity. The CCFs carbonized at 700 °C demonstrate an optimal balance of sp³ amorphous and sp² graphite-like carbons. The average diameter of CCFs-700 is 177 nm and the specific surface area (SSA) is 7.2 m²·g⁻¹. Additionally, the fibers contain oxygen-containing functional groups, as well as nitrogen-containing functional groups, including pyridinic nitrogen and pyrrolic nitrogen. Owing to its characteristics, the CCFs-700 showcases remarkable electrochemical performance, delivering a high reversible capacity of 631.4 mAh·g⁻¹. CCFs-700 also exhibit outstanding cycle stability, which retains approximately all of their first capacity (400.1 mAh·g⁻¹) after 120 cycles. This research offers an economical yet scalable approach for producing flexible and self-supporting anodes for LIBs that do not require current collectors, binders and conductive additives, thereby simplifying the electrode fabrication process.</div></div>","PeriodicalId":48625,"journal":{"name":"International Journal of Mining Science and Technology","volume":"34 12","pages":"Pages 1753-1763"},"PeriodicalIF":11.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929244","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":"Accumulated damage failure mechanism of anchoring structures under cyclic impact disturbance","authors":"Peng Wang ,&nbsp;Nong Zhang ,&nbsp;Jiaguang Kan ,&nbsp;Qun Wei ,&nbsp;Zhengzheng Xie ,&nbsp;Aoran Li ,&nbsp;Zhe He ,&nbsp;Jinghua Qi ,&nbsp;Xingliang Xu ,&nbsp;Changrui Duan","doi":"10.1016/j.ijmst.2024.11.006","DOIUrl":"10.1016/j.ijmst.2024.11.006","url":null,"abstract":"<div><div>Cyclic impact induces ongoing fatigue damage and performance degradation in anchoring structures, serving as a critical factor leading to the instability of deep roadways. This paper takes the intrinsic spatiotemporal relationship of macro-microscopic cumulative damage in anchoring structures as the main thread, revealing the mechanism of bearing capacity degradation and progressive instability of anchoring structure under cyclic impact. Firstly, a set of impact test devices and methods for the prestressed solid anchor bolt anchoring structure were developed, effectively replicating the cyclic impact stress paths in situ. Secondly, cyclic impact anchoring structure tests and simulations were conducted, which clarifies the damage evolution mechanism of the anchoring structure. Prestress loss follows a cubic decay function as the number of impacts increases. Under the same impact energy and pretension force, the impact resistance cycles of extended anchoring and full-length anchoring were increased by 186.7% and 280%, respectively, compared to end anchoring. The rate of internal damage accumulation is positively correlated with impact energy and negatively correlated with anchorage length. Internal tensile cracks account for approximately 85%. Stress transmission follows a fluctuating pattern. Compared to the extended anchoring, the maximum vibration velocity of the exposed end particles in the full-length anchoring was reduced by 59.31%. Damage evolution exhibits a pronounced cumulative mutation effect. Then, a three-media, two-interface mechanical model of the anchoring structure was constructed. It has been clarified that the compressive stress, tensile stress, and oscillation effect arising from rapid transitions between compression and tension are the primary internal factors responsible for the degradation of the anchoring structure’s bearing capacity. Finally, the progressive instability mechanism of the anchoring structure under cyclic impact was elucidated. The mutual feedback and superposition of media rupture, interface debonding, and bearing capacity degradation result in overall failure. The failure process involves stages dominated by oscillation-compression, tensile stress, and compression failure. A targeted control strategy was further proposed. This provides a reference for maintaining the long-term stability of deep roadways under dynamic impact loads.</div></div>","PeriodicalId":48625,"journal":{"name":"International Journal of Mining Science and Technology","volume":"34 12","pages":"Pages 1693-1709"},"PeriodicalIF":11.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929245","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":"Enhancement of 2-hydroxy-3-naphthyl hydroxamic acid adsorption on bastnaesite and monazite surfaces using H2O2 pre-oxidation for improved flotation process","authors":"Weiwei Wang ,&nbsp;Zhengyao Li ,&nbsp;Anhua Zou ,&nbsp;Kai Gao ,&nbsp;Weiyao Zhu ,&nbsp;Shaochun Hou ,&nbsp;Chunlei Guo ,&nbsp;Yuanyuan Wang","doi":"10.1016/j.ijmst.2024.10.007","DOIUrl":"10.1016/j.ijmst.2024.10.007","url":null,"abstract":"<div><div>Rare earth elements have been widely applied in various sectors. Bastnaesite and monazite are crucial rare earth minerals, and flotation is a vital technique for recovering fine-grained rare earth minerals and separating them from associated gangue minerals such as fluorite and apatite. Flotation collectors play a key role in selectively adsorbing valuable minerals, enhancing their surface hydrophobicity, which has prompted considerable research interest. However, the interaction between minerals and reagents relies on the reactivity and selectivity of the reagent groups, as well as the reactive properties of the surface atoms of the minerals. This study proposes the use of H₂O₂ oxidation to enhance the flotation process of rare earth minerals. The flotation experiments demonstrated that pre-adding H₂O₂ before introducing the flotation collector significantly improved the grade and recovery of rare earth concentrates. The adsorption mechanisms of 2-hydroxy-3-naphthyl hydroxamic acid collector on rare earth mineral surfaces before and after H₂O₂ pre-oxidation were studied. The 2-hydroxy-3-naphthyl hydroxamic acid interacts with Ce³⁺ on the surface of unoxidized rare earth minerals, forming chelate compounds with five-membered ring structures. The H₂O₂ exhibited potent oxidizing properties and oxidized the Ce³⁺ on the bastnaesite and monazite surfaces to more stable Ce⁴⁺, which demonstrated stronger binding capability with hydroxamic acid.</div></div>","PeriodicalId":48625,"journal":{"name":"International Journal of Mining Science and Technology","volume":"34 11","pages":"Pages 1613-1623"},"PeriodicalIF":11.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143198109","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)00164-2","DOIUrl":"10.1016/S2095-2686(24)00164-2","url":null,"abstract":"","PeriodicalId":48625,"journal":{"name":"International Journal of Mining Science and Technology","volume":"34 11","pages":"Page IFC"},"PeriodicalIF":11.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143198113","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":"Selective flocculation-flotation of ultrafine hematite from clay minerals under asynchronous flocculation regulation","authors":"Fusheng Niu ,&nbsp;Yuying Chen ,&nbsp;Jinxia Zhang ,&nbsp;Fei Liu ,&nbsp;Ziye Wang","doi":"10.1016/j.ijmst.2024.11.004","DOIUrl":"10.1016/j.ijmst.2024.11.004","url":null,"abstract":"<div><div>The clay mineral flocculation encapsulation poses a major technical challenge in the field of fine mineral separation. Enhancing the ability to separate clay minerals from target mineral surfaces is key to addressing this issue. In the flotation process of ultrafine hematite, sodium polyacrylate (PAAS) was used as a selective flocculant for hematite, polyaluminum chloride (PAC) as a flocculant for kaolinite and chlorite, and sodium oleate (NaOL) as the collector to achieve asynchronous flocculation flotation. This study examines the flotation separation performance and validates it through experiments on actual mineral samples. The results indicate that with PAAS and PAC dosages of 1.25 and 50 mg·L⁻¹, respectively, the iron grade and recovery of the actual mineral samples increased by 9.39% and 7.97%. Through Zeta potential, XPS analysis, infrared spectroscopy, and total organic carbon (TOC) testing, the study reveals the microscopic interaction mechanisms of different flocculants with minerals, providing insights for the clean and efficient utilization of ultrafine mineral resources.</div></div>","PeriodicalId":48625,"journal":{"name":"International Journal of Mining Science and Technology","volume":"34 11","pages":"Pages 1563-1574"},"PeriodicalIF":11.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929247","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":"Influence mechanism of Fe3+ doping on the hydrophobic regulation of kaolinite/water interface: Experiments and MD simulations","authors":"Jun Chen ,&nbsp;Huanhuan Shang ,&nbsp;Yunjia Ling ,&nbsp;Feifei Jia ,&nbsp;Yali Cheng ,&nbsp;Fanfei Min","doi":"10.1016/j.ijmst.2024.10.005","DOIUrl":"10.1016/j.ijmst.2024.10.005","url":null,"abstract":"<div><div>The surface/interfacial reactivity of clay is a critical factor influencing the sedimentation of coal slurry water. To achieve efficient sedimentation of coal slurry water, this paper introduces a novel approach that regulates the hydrophobicity of defective active sites in clay minerals. Fe³⁺-doped kaolinite (Fe³⁺-Kao) was synthesized by hydrothermal methods. Subsequently, tests were conducted on the adsorption capacity, surface wettability, and agglomeration sedimentation of alkyl amine/ammonium salts (AAS) on Fe³⁺-Kao surfaces. Fe³⁺ doping significantly enhances AAS adsorption and alters surface properties from hydrophilic to hydrophobic, promoting kaolinite particle aggregation and sedimentation, thereby improving coal slurry water treatment efficiency. Molecular dynamics (MD) simulations were performed to analyze the statistical adsorption behavior of AAS on Fe³⁺-Kao surfaces. The simulation results indicate that the mechanism by which Fe³⁺ doping influences the hydrophobic regulation of kaolinite surfaces is due to the enhanced interfacial interactions between the kaolinite surface and AAS, where the interfacial effects are more pronounced on surfaces closer to the dopant sites. The findings of this research offer valuable insights for future studies on other types of lattice defects in clay minerals, as well as for the development of more efficient treatment chemicals for coal slurry water.</div></div>","PeriodicalId":48625,"journal":{"name":"International Journal of Mining Science and Technology","volume":"34 11","pages":"Pages 1575-1586"},"PeriodicalIF":11.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929250","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":"Advancing green flotation: Separation of Cu-Pb minerals through the application of eco-friendly organic double reaction group depressant","authors":"Siqi Yang ,&nbsp;Xianping Luo ,&nbsp;Rufeng Chen ,&nbsp;Louyan Shen ,&nbsp;Xun Fan ,&nbsp;Jiancheng Miao ,&nbsp;Xuekun Tang","doi":"10.1016/j.ijmst.2024.11.005","DOIUrl":"10.1016/j.ijmst.2024.11.005","url":null,"abstract":"<div><div>Achieving efficient flotation separation of chalcopyrite and galena while maintaining environmental friendliness poses a challenge. This study utilized the environmentally friendly copolymer acrylic acid-2-acrylamide-2-methylpropanesulfonic acid (AA/AMPS) as a depressant to separate chalcopyrite and galena. Flotation tests revealed a significant reduction in galena recovery when AA/AMPS was employed, with minimal impact observed on chalcopyrite. In artificial mixed ore flotation, AA/AMPS was found to enhance the efficiency of copper and lead separation, surpassing K₂Cr₂O₇. Furthermore, the effectiveness of AA/AMPS in facilitating copper-lead separation has been validated in practical ore flotation. The presence of AA/AMPS inhibited the adsorption of SBX onto galena, as confirmed by zeta potential and contact angle measurements. However, the adsorption on chalcopyrite remained unaffected. Through analyses using Atomic Force Microscope, X-ray photoelectron spectroscopy, and Density Functional Theory, a robust chemical interaction between the reactive groups in AA/AMPS and Pb sites on galena was uncovered, resulting in the formation of a hydrophilic polymer layer. This layer impedes SBX adsorption and reduces galena’s floatability. In contrast, no significant chemical adsorption was observed between AA/AMPS and Cu and Fe sites on chalcopyrite, preserving its SBX affinity. Overall, AA/AMPS shows promise in replacing traditional depressants for Cu-Pb sulfide ore separation, enhancing environmental sustainability.</div></div>","PeriodicalId":48625,"journal":{"name":"International Journal of Mining Science and Technology","volume":"34 11","pages":"Pages 1599-1611"},"PeriodicalIF":11.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143198110","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}