A Method For Detecting Weathered And Oxidized Zones In Shallowly Buried Coal Seams Integrating Logging And Dense Microtremor Array Technology,
2025
National Energy Group Ningxia Coal Industry Co., Ltd., Yinchuan 750011, China
A Method For Detecting Weathered And Oxidized Zones In Shallowly Buried Coal Seams Integrating Logging And Dense Microtremor Array Technology, Ma Zhi, He Weisheng, Hu Qiuping, Guo Zhengxue, Zhou Jinju, Chen Tongjun, Yang Le, Yuan Zhichao
Coal Geology & Exploration
Objective The central and western regions of China hold abundant shallowly buried coal resources. However, the accurate exploration and safe, efficient development of coal seams in these regions are confronted with serious challenges due to weathering and oxidation. To achieve the cost-effective delineation of weathered and oxidized zones in shallowly buried coal seams, this study proposed a novel exploration method that integrated logging and dense microtremor array technology based on differences in physical properties and geophysical responses between weathered and oxidized zones and normal strata. Methods Initially, based on the analysis of the laws of variations in the physical properties …
Global Representative Metallogenic Models And Geophysical Exploration Methods Of Sylvite: Current Research Status And Prospects,
2025
Center for Geophysical Survey, China Geological Survey, Langfang 065000, China; Technology Innovation Center for Earth Near Surface Detection, China Geological Survey, Langfang 065000, China
Global Representative Metallogenic Models And Geophysical Exploration Methods Of Sylvite: Current Research Status And Prospects, Qu Ping, Yue Hangyu, Huang Xiaobing, Song Jiong
Coal Geology & Exploration
Background Sylvite serves as a strategic mineral resource that plays a significant role in ensuring food safety and sustainable agricultural development, with approximately 90% of global potash resources used for potassium fertilizer production. However, developing countries such as China have long faced the challenges of heavy dependence on potash imports and insufficient potash resource continuity. Such a supply and demand framework causes China to speed up research on potash metallogenic patterns and technical innovations in potash exploration. This will help overcome resource bottlenecks. Objective This study presented a systematic summary of global potash metallogenic models and investigated the approaches of …
Numerical Simulations Of The Overburden Stability In Underfilling Zones During Continuous Mining And Continuous Backfilling Of Coal Mines,
2025
College of Energy and Mining Engineering, Xi’an University of Science and Technology, Xi’an 710054, China; Key Laboratory of Western Mine Exploitation and Hazard Prevention, Ministry of Education, Xi’an 710054, China
Numerical Simulations Of The Overburden Stability In Underfilling Zones During Continuous Mining And Continuous Backfilling Of Coal Mines, Liu Lang, Luo Yixiao, Zhu Mengbo, He Jun, Qu Huisheng, Duan Huaijun, Wei Baoning, Liu Zhizhen
Coal Geology & Exploration
Objective and Method Coals serve as a predominant energy source in China. However, coal mining has resulted in increasingly pronounced ecological issues such as ground subsidence and solid waste accumulation. Although the continuous mining and continuous backfilling (CMCB) technology allows for efficient resource recovery and ecological protection through backfilling with coal-based solid waste, the issue of insufficient roof-contact backfilling (termed underfilling) poses a serious threat to the overburden stability during mining. Given the unclear mechanisms behind the influence of coupled multiple factors of underfilling zones in current research, this study constructed three-dimensional numerical models using the 3DEC discrete element software …
Response Characteristics Of Vegetation Ecology And Land Use Changes Tocoal Mining In Semi-Arid Regions,
2025
School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Response Characteristics Of Vegetation Ecology And Land Use Changes Tocoal Mining In Semi-Arid Regions, Du Zhen, Zhang Maosheng, Yun Shaoqi, Sun Pingping, Feng Li
Coal Geology & Exploration
Objective In semi-arid regions, intensive coal mining is prone to induce vegetation degradation and reshape the land use pattern. To identify the ecological impacts of coal mining and provide support for differential restoration, this study presents a quantitative comparison of changes in vegetation, soil moisture content, and land use types between mining-affected and non-mining areas.Methods Yulin City, Shaanxi Province was investigated in this study. Two parallel baseline frameworks were constructed: mining-affected and non-mining areas, which were compared under the sandy-fluvial terrace and loess hilly-gully landforms. The annual maximum normalized difference vegetation index (NDVI) derived from Landsat imagery was used …
Water Immersion-Induced Damage Mechanisms And Enhancement Via Nano-Modification For Artificial Dam Specimens With Vertical Interfaces,
2025
State Key Laboratory of Water Resource Protection and Utilization in Coal Mining, Beijing 102209, China; Inner Mongolia Research Institute, China University of Mining and Technology (Beijing), Beijing 100083, China; Beijing Key Laboratory of Precision Mining of Associated Energy, China University of Mining and Technology (Beijing), Beijing 100083, China
Water Immersion-Induced Damage Mechanisms And Enhancement Via Nano-Modification For Artificial Dam Specimens With Vertical Interfaces, Li Yijia, Hao Xianjie, Chen Yuguang, Pang Tian, Yang Huaixiang, Li Hang, Ji Jinyi, Li Xinyu
Coal Geology & Exploration
Objective To accelerate ecological protection and high-quality development in the Yellow River basin, the concept of “conductivity, storage, and utilization” has been proposed to achieve the mine water storage and protection by transforming goafs into underground reservoirs and utilizing waterproof concrete dams. However, under the action of long-term water immersion and mining activity, the interfaces of composite concrete dam structures might undergo strength degradation, leading to hidden hazards. Methods By incorporating 0.5% and 1.0% nano-SiO2, -Al2O3, and -TiO2, this study prepared specimens with one vertical interface each that comprised double semi-cylinders through …
Building And Geological Interpretation Of A 3d Resistivity Model For The Reclamation Area Of The Jiaozhou Bay,
2025
Key Laboratory of Geological Safety for Underground Space in Coastal Cities, Ministry of Natural Resources, Qingdao 266101, China；Qingdao Geological Engineering Investigation Institute (Qingdao Geological Exploration and Development Bureau), Qingdao 266101, China
Building And Geological Interpretation Of A 3d Resistivity Model For The Reclamation Area Of The Jiaozhou Bay, Yu Peng, Zhao Mingyue, Yang Haiyan, Li Wenyu, Tian Jian, Yan Houzhen, Zhang Chao
Coal Geology & Exploration
Background With the advancement in smart city construction in China, the development and utilization of urban underground space have become a focal point. Geophysical methods, as a crucial technical means for underground geological structure exploration, face new challenges when applied to complex exploration environments in urban areas. Objectives and Methods To address issues in underground space exploration in the coastal area of Qingdao, this study investigated the reclamation area along the eastern coast of the Jiaozhou Bay. Using a detection technique that combined the transient electromagnetic method (TEM) using a conical source and high-density resistivity method, this study constructed a …
A Rock Engineering System Model For Predicting Fragment Size Of Muck-Pile Using Geometric Parameters And Rock Mass Properties,
2025
Federal University of Technology Akure, Department of Mining Engineering, Nigeria
A Rock Engineering System Model For Predicting Fragment Size Of Muck-Pile Using Geometric Parameters And Rock Mass Properties, Patrick Adeniyi Adesida, Victor Abioye Akinbinu, Babatunde Adebayo
Journal of Sustainable Mining
This study aimed to evaluate rock fragmentation risk indexes and develop a predictive model for the median size of fragment (X50) using the Rock Engineering System (RES). The methodology includes the analysis of 15 significant parameters of rock properties and blast design, which are considered to be important to rock fragmentation from 30 selected blast sites. These parameters include rock type, hardness, blast-hole diameter, charge weight, blast pattern, and others that control fragmentation results. Statistical analysis was performed to validate the RES-based model developed from these parameters. The model exhibited a strong predictive capacity, evidenced by a …
Empirical Methods For Support System Design In Deep Serpentinite Excavations: A Critical Evaluation,
2025
Laboratory of Applied Geophysics, Geotechnics, Engineering Geology and Environment, Mohammadia School of Engineers, Mohammed V University in Rabat, 10090, Morocco
Empirical Methods For Support System Design In Deep Serpentinite Excavations: A Critical Evaluation, Anas Driouch, Redouane Oubah, Abdelaziz Lahmili, Latifa Ouadif
Journal of Sustainable Mining
Underground mining excavations in fragile serpentinite rock masses represent a significant challenge today. The complicated features of these rock formations, especially at great depths, make it difficult to classify them using commonly employed methods. This paper focuses on the application of empirical methods for the classification of serpentinite rock masses and the design of support systems in underground mining excavations. Specifically, it concerns an access tunnel excavated entirely in serpentinite at a depth of 460 m. Geomechanical classification systems indicate that the Tunnelling Quality Index (Q-system) and Rock Mass Rating (RMR) evaluate serpentinites as rock masses of exceptionally poor to …
Feasibility Study Of Flywheel Mitigation Controls Using Hamiltonian-Based Design For E3 High-Altitude Electromagnetic Pulse Events,
2025
Sandia National Labs
Feasibility Study Of Flywheel Mitigation Controls Using Hamiltonian-Based Design For E3 High-Altitude Electromagnetic Pulse Events, Connor A. Lehman, Rush Robinett, David Wilson, Wayne Weaver
Michigan Tech Publications
This paper explores the feasibility of implementing a flywheel energy storage system designed to generate voltage for the purpose of mitigating current flow through the transformer neutral path to ground, which is induced by a high-altitude electromagnetic pulse (HEMP) event. The active flywheel system presents the advantage of employing custom optimal control laws, in contrast to the conventional approach of utilizing passive blocking capacitors. A Hamiltonian-based optimal control law for energy storage is derived and integrated into models of both the transformer and the flywheel energy storage system. This Hamiltonian-based feedback control law is subsequently compared against an energy-optimal feedforward …
Stochastic Modeling Of Electromagnetic Wave Propagation Through Extreme Dust Conditions In Underground Mines Using Vector Parabolic Approach,
2025
Missouri University of Science and Technology
Stochastic Modeling Of Electromagnetic Wave Propagation Through Extreme Dust Conditions In Underground Mines Using Vector Parabolic Approach, Emmanuel Atta Antwi, Samuel Frimpong, Muhammad Azeem Raza, Sanjay Madria
Mining Engineering Faculty Research & Creative Works
Post-disaster underground (UG) mine environments are characterized by complex and rapidly changing conditions, adding extra attenuation to propagating electromagnetic (EM) waves. One such complex condition is the extreme generation of dust and sudden rise in humidity contributing to extra attenuation effects to propagating waves, especially under varying airborne humidity and dust levels. The existing wave propagation prediction models, especially those that factor in the effect of dust particles, are deterministic in nature, limiting their ability to account for uncertainties, especially during emergency conditions. In this work, the vector parabolic equation (VPE) model is modified to include dust attenuation effects. Using …
Feasibility Study On Large-Scale Geologic Carbon Sequestration In Southern Colorado,
2025
Michigan Technological University
Feasibility Study On Large-Scale Geologic Carbon Sequestration In Southern Colorado, Yanrui Ning, Ali Tura, David Herman, Jay Bridgeman, Dana Clark
Michigan Tech Publications
This study evaluates the feasibility of storing over 50 million metric tons of CO2 within a 30-year period in southern Colorado. The target for injection is the 7000 ft (2134 m)-deep Lyons saline aquifer formation, with the overlying alternating layers of anhydrite and shale serving as seals. Geological static models were constructed using seismic, well log and core data, followed by fluid flow modeling to understand the CO2 injection strategy, saturation distribution and plume size. The results indicate that approximately 60 million metric tons of CO2 can be injected with 2 wells into the formation over 30 years, with 85 …
Detection And Prevention Of Water Inrush From Seam Floor During Coal Mining Above Confined Aquifer,
2025
Department of Intelligent Mining, China University of Mining and Technology in Beijing, Beijing, China
Detection And Prevention Of Water Inrush From Seam Floor During Coal Mining Above Confined Aquifer, Weidong Pan, Yupei Deng, Houlin Du, Shiqi Liu, Mingtao Xu, Xingjie Liu
Journal of Sustainable Mining
With the increasing intensity of coal resource exploitation in China, the geological conditions of the working face are becoming more and more complex, and the bottom plate breakage (bottom bulge) and water inrush disasters caused by pressurized water mining are becoming more prominent. This article is based on the 21605 working face of Xin’an Coal Mine in Zaozhuang Mining Group. Through theoretical analysis and numerical calculations, the characteristics and scope of coal seam floor failure in the working face are obtained. Especially, the electrode cable direct current detection system designed through self-optimization was used for actual testing. Research shows that …
The Suitability Of Advanced Geospatial Technologies In Monitoring Mine Surface Displacement,
2025
Faculty of Geomatics and Land Administration, Hanoi University of Mining and Geology, 18 Vien Street, Hanoi, Vietnam
The Suitability Of Advanced Geospatial Technologies In Monitoring Mine Surface Displacement, Long Quoc Nguyen, Tuyet Minh Dang, Lipecki Tomasz
Journal of Sustainable Mining
This study conducts a thorough review of the current scientific literature on the application of geospatial methods in the assessment of mining-induced displacement. The scope of research included technologies for determining deformation, subsidence, and landslide in mining areas. Global Navigation Satellite Systems, Unmanned Aerial Vehicles, Terrestrial Laser Scanners, Remote Sensing, and fusion methods are approaches used to solve the research objectives. Additionally, the paper also mentions some advantages, disadvantages, and scope of application of these methods. The investigation revealed that the displacement detection method most commonly used at the moment is satellite radar interferometry.
Towards Sustainable Mining: Ghg Considerate Open Pit Long-Term Planning Using Adaptive Large Neighborhood Search Algorithm,
2025
Department of Mining, Metallurgy, and Materials Engineering, Faculty of Science and Engineering, Laval University, Quebec City, QC, Canada
Towards Sustainable Mining: Ghg Considerate Open Pit Long-Term Planning Using Adaptive Large Neighborhood Search Algorithm, Bahar Amirmoeini, Martin Grenon, Ali Moradi Afrapoli
Journal of Sustainable Mining
Mine planning involves the systematic design and coordination of mineral extraction from the earth’s crust, integrating exploration, production, and various engineering considerations. With increasing emphasis on environmental responsibility, the mining industry is under pressure to incorporate environmental considerations into mine planning. This paper addresses the precedence-constrained production scheduling problem (PCPSP) within the context of green long-term mining planning, aiming to optimize extraction processes while restricting carbon emission. Given the NP-hard nature of the PCPSP, this study introduces an adaptive large neighborhood search (ALNS) algorithm tailored specifically for long-term mine planning. A range of computational experiments have been carried out, including …
Economic Viability And Environmental Sustainability: A Cost-Benefit Analysis Of Green Technologies In Mineral Extraction,
2025
Anhui University of Science and Technology, Department of Mining Management, China,
Economic Viability And Environmental Sustainability: A Cost-Benefit Analysis Of Green Technologies In Mineral Extraction, Tshinkobo Bukasa Orphea, Agyingi Babaca Agyingib, Xiangrui Meng
Journal of Sustainable Mining
This research offers a novel approach to comparing green technologies’ economic profitability and environmental sustainability of their mineral extraction based upon econometric and life cycle assessment methodologies. Quantitative results show attractive results with an NPV of $2,014,001 and an IRR of 17%. In the third year, the project nets at $300,000, or 63%, at a 7% discount rate. However, soil protection remains challenging, but pollution coefficients are improved, as evidenced by environmental impact assessments (EIAs). The findings in the study further underscore how regulatory frameworks and market drivers dictate the use of green technology. The economic, environmental and regulatory costs …
A Case Study Comparing The Results Of A Copper Open-Pit Mine Scheduling Considering Two Different Approaches For Spatial Interpolation Of Comminution Geometallurgical Variables,
2025
Federal University of Minas Gerais, Graduate Program in Metallurgical, Materials and Mining Engineering (PPGEM), Brazil
A Case Study Comparing The Results Of A Copper Open-Pit Mine Scheduling Considering Two Different Approaches For Spatial Interpolation Of Comminution Geometallurgical Variables, Sílvia Martins, Pedro Campos, Douglas Mazzinghy
Journal of Sustainable Mining
The use of geometallurgical variables to improve the accuracy obtained in mine planning is an increasingly present reality in mining. However, the way these variables are interpolated to construct the block model is still a major challenge since they are non-additive variables. In this case study, a database from a copper mine located in Brazil was used to compare mining planning by Direct Block Scheduling using two spatial interpolation approaches. In the first approach, the geometallurgy block model was produced interpolating the comminution indexes Axb and BWI from the drill holes, and the specific energy was calculated at each block. …
Impact Of Multiple Mining Subsidence On Large Diameter Steel Pipelines: The Upper Silesian Coal Basin Case Study,
2025
Central Mining Institute – National Research Institute, Department of Geology and Geophysics and Surface Protection, Poland,
Impact Of Multiple Mining Subsidence On Large Diameter Steel Pipelines: The Upper Silesian Coal Basin Case Study, Piotr Kalisz, Magdalena Zięba, Marcin Grygierek
Journal of Sustainable Mining
The article concerns the impact of multiple mining subsidence on pipeline expansion capacity based on the analysis of the field research results. The article presents a case study related to a water mains system that supplies drinking water to approximately 3.5 million consumers. These pipelines are made of steel with diameters of 1600 mm and 1400 mm. The water mains partly run through mining and post-mining areas in the Upper Silesian Coal Basin in Poland. These pipelines are equipped with expansion joints to protect them against the impact of ground deformations. The field research concerned the assessment of the position …
Recovery Of Magnesium Sulfate And Calcium Sulfate From Zinc Flotation Tailing,
2025
University of São Paulo, Polytechnic School, Chemical Engineering Department, Rua do Lago, 250, Cidade Universitária, Butantã, 05508-030, São Paulo, Brazil.
Recovery Of Magnesium Sulfate And Calcium Sulfate From Zinc Flotation Tailing, Raquel Húngaro Costa, Jonathan Tenório Vinhal, Tatiana Scarazzato, Denise Crocce Romano Espinosa
Journal of Sustainable Mining
Resource recovery is a process that has been used to obtain products from industrial waste. Mining tailings can be used as an alternative through ore beneficiation to create by-products for this type of waste. The work herein investigated the recovery of two products from a real tailing generated in the Zn beneficiation route in the flotation step. A non-magnetic fraction was submitted to a hydrometallurgical route to produce MgSO4 and CaSO4. Thermodynamic simulations using FactSage software were performed to evaluate the optimal leaching conditions varying the S:L ratio, the sulfuric acid concentration, and temperature. The best modeled conditions …
Quantifying The Decay Timescale Of Volcanic Sulfur Dioxide In The Stratosphere,
2025
Massachusetts Institute of Technology
Quantifying The Decay Timescale Of Volcanic Sulfur Dioxide In The Stratosphere, Paul A. Nicknish, Kane Stone, Susan Solomon, Simon Carn
Michigan Tech Publications
The injection of sulfur dioxide (SO2) into the stratosphere and its subsequent oxidation to form sulfate aerosols after large volcanic eruptions can have profound effects on Earth's climate. The removal of volcanic SO2 in the stratosphere is thought to be driven by its gas-phase oxidation by the hydroxyl radical (OH); once oxidized, it goes on to form sulfate aerosols. However, it has also been suggested that heterogeneous oxidation on ash could also be important or even dominant, which would imply the faster removal of SO2 and thus the faster formation of aerosols, at least in ash-rich plumes. Additionally, recent work …
Enrichment Factors And Play Fairway Mapping Of Helium In Typical Zones Of The Ordos Basin,
2025
Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China
Enrichment Factors And Play Fairway Mapping Of Helium In Typical Zones Of The Ordos Basin, Gao Jianrong, Tao Shizhen, Liu Xiangbai, Yang Wei, Zhao Zhenyu, Chen Xiuyan, Xu Wanglin, Zhang Chunlin, Song Wei, Chen Yue, Huang Junping, Ma Zhanrong
Coal Geology & Exploration
Background The Ordos Basin enjoys abundant natural gas resources, which generally bear helium, making this basin hold great helium resource potential. In this case, detailed exploration is essential for the future transition from natural gas-helium joint exploration to special helium exploration in the basin.Objective and Method To systematically investigate the distribution and potential of helium resources in the Ordos Basin, natural gas samples were taken from different areas of the basin for analysis and tests. To examine the primary factors controlling helium accumulation and enrichment, this study conducted a systematic analysis of the basement, sedimentary rock layers, fault systems, …
