Exploring Sandstone-Hosted Uranium Deposits In Coal-Bearing Basins Using Geophysical Methods: A Case Study Of The East-Central Erlian Basin,
2025
Hohhot General Survey of Natural Resources Center, China Geological Survey, Hohhot 010090, China; Innovation Base for Gold Exploration Technology in the Northern Margin of North China Craton, Hohhot 010013, China
Exploring Sandstone-Hosted Uranium Deposits In Coal-Bearing Basins Using Geophysical Methods: A Case Study Of The East-Central Erlian Basin, Liang Jiangang, Kuang Haiyang, Cao Zhanning, Yang Weimin
Coal Geology & Exploration
Background Sandstone-hosted uranium deposits, critical to the uranium resources growth in China, are extensively distributed in continental and marine-continental transitional sedimentary rocks. Currently, the exploration and research on these deposits in China focus primarily on the Meso-Cenozoic sedimentary basins in the northern regions. Objective and Methods The Erlian Basin exhibits the coexistence of uranium, coals, and oil. This study investigated the east-central part of this basin using multiple geophysical data, including regional gravity survey, aeromagnetic survey, and airborne radioactivity survey (ARS). Furthermore, six 2D seismic profiles totaling 130 km in length were deployed, and instantaneous soil radon measurement as employed. …
Impacts Of Diamond Particle Sizes On Performance Of Ni-Cu Superhydrophobic Coatings On Drilling Tool Surfaces,
2025
Faculty of Engineering, China University of Geosciences, Wuhan 430074, China
Impacts Of Diamond Particle Sizes On Performance Of Ni-Cu Superhydrophobic Coatings On Drilling Tool Surfaces, Wen Qi, Li Tao, Duan Longchen, Pan Bingsuo
Coal Geology & Exploration
Objective Applying superhydrophobic coatings on drilling tool surfaces can effectively alleviate the challenges posed by drill bit balling and core barrel blockage. However, the limited mechanical stability of superhydrophobic coatings has somewhat hindered their widespread application in practical operations. Methods To improve the durability of superhydrophobic coatings, this study co-deposited diamond micropowder into Ni-Cu composite coating using composite electrodeposition, followed by surface modification using 1H,1H,2H,2H-perfluorodecyltrimethoxysilane (PFDTES). Employing a variety of testing methods, this study investigated the impacts of the mass fractions of diamonds with particle sizes of 1 μm and 20 μm (also referred to as diamonds W1 and W20, …
Primary Geological Characteristics, Advances In Exploration And Production, And Strategies Of Coalbed Methane In South China,
2025
Key Laboratory of Deep Coalbed Methane Exploration and Development, SINOPEC, Nanjing 210011, China; East China Oil and Gas Company, SINOPEC, Nanjing 210011, China
Primary Geological Characteristics, Advances In Exploration And Production, And Strategies Of Coalbed Methane In South China, Guo Tao, Zhou Yatong, Jin Xiaobo, Gao Xiaokang, Peng Xingping
Coal Geology & Exploration
Objective and Methods South China contains abundant coalbed methane (CBM) resources from numerous, superimposed, thin coal seams, serving as a significant replacement for China’s CBM exploration and production in the future. Despite significant progress in recent years, the CBM industry still faces several challenges in comprehensive and effective production. To accelerate its development, this study summarizes the primary geological characteristics of CBM resources in South China, organizes the current status and advances in CBM exploration and production in this region, and proposes corresponding technical strategies. Results The results indicate that the abundant CBM resources in South China exhibit coal seams …
Stratigraphic Characteristics And Shale Gas Enrichment Interval Distribution Of The Lower Cambrian Qiongzhusi Formation, Upper Yangtze Region, China,
2025
PetroChina National Institute of Excellence Engineers, Beijing 100096, China; National Energy Shale Gas Research and Development (Experimental) Center, Beijing 100083, China
Stratigraphic Characteristics And Shale Gas Enrichment Interval Distribution Of The Lower Cambrian Qiongzhusi Formation, Upper Yangtze Region, China, Wang Hongyan, Shi Zhensheng, Zhao Qun, Zhou Tianqi, Wang Pengfei
Coal Geology & Exploration
Objective Shales in the Lower Cambrian Qiongzhusi Formation within the Upper Yangtze region preserve critical information about primitive oceans. Furthermore, these shales serve as vital source rocks and reservoirs, having demonstrated considerable potential for shale gas exploration. Methods Using seismic, borehole, and outcrop data, this study investigated the shale strata and their distribution in the Qiongzhusi Formation through comparative analysis. Accordingly, the sweet-spot interval was determined. Results and conclusions The results indicate that the Lower Cambrian Qiongzhusi Formation in the Upper Yangtze region can be divided into the first and second members (also referred to as the Qiong 1 and …
Advances In Research On Technologies For Large-Scale Coal Gangue Utilization For Green Mine Construction,
2025
Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology, Xuzhou 221116, China; State Key Laboratory of Coal Mine Disaster Prevention and Control, China University of Mining and Technology, Xuzhou 221116, China
Advances In Research On Technologies For Large-Scale Coal Gangue Utilization For Green Mine Construction, Shi Quanlin, Long Lihua, Yang Qian, Wang Shaohui, Xie Dawei
Coal Geology & Exploration
Background The coal gangue, a solid waste, features high production and a continuous increase in the amount piled in China. The long-term piling up of coal gangue will cause the waste of land resources and environmental pollution in mining areas. Various methods for utilizing coal gangue, such as preparing high-value-added chemical products and extracting useful elements, suffer a limited consumption capacity, failing to meet the requirements of large-scale disposal and utilization of solid wastes and green mine construction. Advances The comprehensive utilization of coal gangue for mining area reclamation and underground backfilling represents a critical direction for its large-scale disposal …
Advances In Research On The Mechanical Responses Of Hot Dry Granites Under Varying Cooling Conditions In China,
2025
School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China; No. 112 Geological Team, Bureau of Geology and Mineral Exploration and Development of Guizhou Province, Anshun 561000, China
Advances In Research On The Mechanical Responses Of Hot Dry Granites Under Varying Cooling Conditions In China, Xie Jingyu, Song Jiwei, Sui Jiancai, Zhao Meng, Wang Ren, Zeng Chong, Wang Jianlong
Coal Geology & Exploration
Significance Enhanced geothermal systems (EGSs) serve as a key technique for exploiting hot dry rocks (HDRs) presently. During the construction and operation of EGSs, rocks of the HDR reservoirs will experience various cooling conditions, such as natural cooling, cyclic cooling, and water cooling, rendering it greatly significant to investigate the mechanical response characteristics of granites—typical HDRs—under varying cooling conditions. Advances This study offers a summary and analysis of experimental data about the mechanical responses, i.e., uniaxial compressive strength (σc), elastic modulus (E), tensile strength (σt), and Poisson's ratio (ν), of …
Engineering Practice Of Advance Gas Control For Crushed Soft Coal Seams Through Directional Fracturing Using A Long Borehole In The Coal Seam Roof,
2025
CCTEG Xi'an Research Institute (Group) Co., Ltd., Xi'an 710077, China; College of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
Engineering Practice Of Advance Gas Control For Crushed Soft Coal Seams Through Directional Fracturing Using A Long Borehole In The Coal Seam Roof, Jia Bingyi, Li Shugang, Chen Dongdong, Zhang Qun
Coal Geology & Exploration
Objective and Methods The crushed soft coal seams susceptible to intense coal and gas outbursts exhibit high gas content and pressure. Consequently, during borehole drilling for regional gas pre-drainage in such coal seams, high blowout intensity is prone to cause gas overrun and low drilling efficiency. To accelerate its development, this study analyzed the status and adaptability of existing technologies for regional advance gas drainage and pressure relief, as well as the fracture propagation characteristics of coal seam roofs during indirect fracturing using boreholes near the roofs. Accordingly, this study proposed an advance gas drainage and pressure relief technology for …
Dynamic Evolutionary Pattern Of Fractures In Tectonically Deformed Coal-Bearing Assemblages During Loading,
2025
College of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China; Key Laboratory of Xinjiang Coal Resources Green Mining, Ministry of Education, Xinjiang Institute of Engineering, Urumqi 830023, China; Xinjiang Key Laboratory of Coal Mine Disaster Intelligent Prevention and Emergency Response, Xinjiang Institute of Engineering, Urumqi 830023, China
Dynamic Evolutionary Pattern Of Fractures In Tectonically Deformed Coal-Bearing Assemblages During Loading, Zhao Pengxiang, Liu Yingying, Li Shugang, Liu Yanqun, Liu Yunchuan, Wang Laolao, Lu Weidong
Coal Geology & Exploration
Objective The formation and evolution of fractures in tectonically deformed coals (TDCs) exert a significant influence on the occurrence of dynamic hazards to TDC-bearding combinations under mining disturbance. However, the influence patterns remain unclear. Methods Using a NanoVoxel-3000 high-resolution inspection system for multiscale integrated geotechnical scanning and analysis, this study performed uniaxial compression and CT scanning experiments on TDC-bearing combination specimens. Moreover, this study reconstructed the mesoscopic geometric structures of the specimens using the Avizo software, obtaining three-dimensional visualization models of fractures inside the specimens. Results and Conclusions During loading of a specimen studied, fractures were generated in the TDC …
A New Quantitative Assessment Model For The Joint Roughness Of Rock Masses,
2025
School of Mining and Mechanical Engineering, Liupanshui Normal University, Liupanshui 553004, China; College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China
A New Quantitative Assessment Model For The Joint Roughness Of Rock Masses, Chen Shijiang, Liu Hongwei, Li Tao, Yue Hu, Liu Jiangang, Yu Jiang
Coal Geology & Exploration
Objective The joint roughness of rock masses significantly affects their mechanical properties such as shear strength and permeability. Therefore, its quantitative characterization is significant for the engineering practices of jointed rock masses. Current research achievements indicate that among statistical parameters, the root mean square (RMS) of first derivatives (Z2) exhibits the strongest correlation with the joint roughness of rock masses, serving as a vital method for characterizing joint roughness. However, the characterization using this parameter is severely affected by the sampling interval (SI). Methods Based on a systematic analysis of the drawbacks of Z2 in characterizing …
Zonal Prediction Of The Heights Of Water-Conducting Fracture Zones Under Varying Overburden Types In North China-Type Coalfields,
2025
School of Earth Sciences and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Zonal Prediction Of The Heights Of Water-Conducting Fracture Zones Under Varying Overburden Types In North China-Type Coalfields, Xu Dongjing, Zhang Ruiqing, Gao Weifu, Jiang Haonan, Zhu Haifeng, Li Ye, Xia Zhicun
Coal Geology & Exploration
Background The gradual increase in the exploitation depth and intensity of coal resources in the North China-type coalfields has caused problems such as overburden movement and damage, as well as fracture evolution. These hot topics have attracted considerable attention. Methods A total of 117 sets of measured data on the heights of water-conducting fracture zones in the North China-type coalfields were collected, consisting of 17 sets from hard overburden, 42 sets from moderately hard overburden, and 58 sets from soft overburden. Using these data, this study explored the effects of varying mining heights, mining depths, and lengths of the mining …
A Method For Time Difference Correction For Real-Time Seismic-While-Mining Data,
2025
CCTEG Xi’an Research Institute (Group) Co., Ltd., Xi’an 710077, China
A Method For Time Difference Correction For Real-Time Seismic-While-Mining Data, Jin Dan
Coal Geology & Exploration
Objective Seismic-while-mining (SWM) data are usually acquired using multiple stations, each of which is equipped with multiple data acquisition traces. However, the SWM data received by these stations exhibit time differences due to the lack of GPS signals underground and the fact that current network synchronization technologies are confined by network delays underground. Given that the time synchronization accuracy directly affects the quality of data processing and imaging, the time difference correction of real-time SWM data is essential for accurate SWM detection. Methods Since current high-precision timing systems on the surface suffer from signal loss underground, this study proposed an …
Influencing Mechanisms Of Microwave Radiation Duration On The Efficiency Of Methane Adsorption In Coals,
2025
College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China
Influencing Mechanisms Of Microwave Radiation Duration On The Efficiency Of Methane Adsorption In Coals, Hu Yiliang, Bao Yuan, Meng Jiahao, Chen Xueru, Shan Tuo
Coal Geology & Exploration
Objective Microwave radiation duration represents a critical factor in enhancing coalbed methane (CBM) recovery using microwave-aided methods. However, the influencing mechanism of microwave radiation duration on the efficiency of methane adsorption in coal seams remains unclear. This necessitates delving into the specific effects of microwave radiation duration on the adsorption efficiency and unveiling their intrinsic constraints. Methods This study investigated the No.2 coal seam in the Huangling mining area. The coal samples were irradiated for 0‒18 min using 700 W microwaves. Using experiments and analyses including isothermal adsorption, low-temperature liquid N2 adsorption, and Fourier transform infrared spectroscopy (FTIR), this study …
Assessment Indicator System For Siting Of Geologic Co2 Sequestration In Low-Porosity And Low-Permeability Saline Aquifers: A Case Study Of The Ordos Basin,
2025
China National Logging Corporation, Xi’an 710077, China
Assessment Indicator System For Siting Of Geologic Co2 Sequestration In Low-Porosity And Low-Permeability Saline Aquifers: A Case Study Of The Ordos Basin, Mou Yu, Wang Haofan, Shaanxi Key Laboratory For Carbon Neutral Technology, Carbon Neutrality College (Yulin), Northwest University, Xi’An 710069, China Xuejun, Ma Jinfeng, Luo Shaocheng, Li Lin, Ding Zhao
Coal Geology & Exploration
Objective CO2 injection and geologic sequestration in deep saline aquifers as underground spatial resources represents an important means of achieving the targets of greenhouse gas emission reduction and carbon neutrality. Current assessments of the siting and potential for geologic CO2 sequestration in saline aquifers focus primarily on the macroscopic basin and regional scales, with the assessment indicator system scarcely accounting for the suitability of low-porosity and low-permeability strata. Methods Using data from 192 wells in the Yusheng area, Ordos Basin, this study conducted the division and correlation of intervals bearing no hydrocarbon, carried out lithologic and physical interpretations …
Optimization And Application Of Sand Bailing Technology For Coalbed Methane Horizontal Wells,
2025
China United Coalbed Methane Co., Ltd., Beijing 100015, China; Provincial Center of Technology Innovation for Coal Measure Gas Co-Production, Taiyuan 030032, China
Optimization And Application Of Sand Bailing Technology For Coalbed Methane Horizontal Wells, Zhang Fei, Wang Yibing, Cheng Lu, Mei Wenbo, Yang Qi, Shen Wenjie, Cao Chao, Lai Peng, Liao Zhengkai, Xian Bao'an, Bi Yansen
Coal Geology & Exploration
Objective and Methods Coalbed methane (CBM) horizontal wells face challenges such as sand accumulation in completion strings, pipe wall scaling, and pump sticking, leading to declined CBM production or shutdown of these wells. This severely restricts continuous, stable CBM production. Removing pulverized coals and sands from wellbores through mechanical sand bailing is recognized as an effective technique to restore and improve the CBM production of horizontal wells. To address challenges such as poor string sealing performance, low efficiency, and sand consolidation in mechanical sand bailing, this study created optimized tools including claw-shaped scraper tips, sand-breaking drill bits, eccentric flaps, and …
Application Of A Generative Adversarial Network Algorithm To Filling Blank Strips Of Fractures In Formation Microresistivity Imaging Images,
2025
School of Electronic Engineering, Xi’an Shiyou University, Xi’an 710065, China
Application Of A Generative Adversarial Network Algorithm To Filling Blank Strips Of Fractures In Formation Microresistivity Imaging Images, Kang Zhengming, Wu Chensheng, Yang Guodong, Wu Disheng, Wang Ruifei, Yang Xiangyu, Gan Wei
Coal Geology & Exploration
Objective Gaps between the electrodes of formation microresistivity imaging (FMI) imagers lead to blank strips in the resistivity images of borehole walls, significantly influencing the parameter assessment for fractures near borehole walls. The absence of full-borehole images renders it challenging to assess the blank strip filling quality for fractures in FMI images. Using a dataset constructed utilizing both simulated and actual data, this study proposed a generative adversarial network (GAN)-based method for filling the blank strips of fractures in FMI images. Methods First, the resistivity logging responses of a fractured formation were simulated using the 3D finite element method. Actual …
An Edge Awareness-Enhanced Visual Slam Method For Underground Coal Mines,
2025
College of Artificial Intelligence and Computer Science, Xi’an University of Science and Technology, Xi’an 710054, China; College of Mechanical Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
An Edge Awareness-Enhanced Visual Slam Method For Underground Coal Mines, Mu Qi, Liang Xin, Guo Yuanjie, Wang Yuhao, Li Zhanli
Coal Geology & Exploration
Objective Underground coal mines commonly exhibit low illuminance, weak textures, and structuralization-induced feature degradation. These scenes lead to challenges of insufficient effective features and high mismatch rates to the visual simultaneous localization and mapping (SLAM) system, severely compromising its localization accuracy and robustness. Methods This study proposed an edge awareness-enhanced visual SLAM method. First, an edge-awareness constrained low-illuminance image enhancement module was developed. Specifically, images with clear textures and uniform illumination were obtained using the Retinex algorithm optimized using an adaptive gradient-domain guided filter. This significantly improved feature extraction performance under low and uneven lighting conditions. Second, an edge awareness-enhanced …
Solving A Multi-Stage Mine Sequencing Model Encompassing Excavator Allocation Through Constraint Programming In A Bauxite Strip Mining Operation,
2025
Federal University of Rio Grande do Sul, Mining Engineering Department, Brazil
Solving A Multi-Stage Mine Sequencing Model Encompassing Excavator Allocation Through Constraint Programming In A Bauxite Strip Mining Operation, Jorge Luiz Valença Mariz, Marcel Antonio Arcari Bassani, Rodrigo De Lemos Peroni, Octávio R. A. Guimarães, Flávio H. Tavares
Journal of Sustainable Mining
Sedimentary mineral deposits are generally tabular and sub-horizontal, composed of one or multiple well-defined seams, arranged over large extensions, and when close to the surface, they are mined by surface mining methods. These geometric characteristics make it suitable for the application of the strip mining method as an alternative to the traditional open-pit mining method, which allows the reduction of the truck haulage fleet and the costs associated with waste disposal. Consequently, it reduces the greenhouse gas emissions and carbon footprint associated with excavation and transportation processes. This article presents a two-stage mathematical model based on Integer Linear Programming to …
System Change, Not Climate Change: Collaborative Development Of A Few Nexus Experiential Learning Course For A Justice-Centered Comparative Study Abroad Program,
2025
School for International Training Graduate Institute and SIT Study Abroad
System Change, Not Climate Change: Collaborative Development Of A Few Nexus Experiential Learning Course For A Justice-Centered Comparative Study Abroad Program, Sonya Ahamed
National Collaborative for Research on Food, Energy, and Water Education (NC-FEW)
The International Honors Program (IHP) on Climate Change: The Politics of Land, Water and Energy Justice has been offered by the School for International Training (SIT) since 2013. This thematic multidisciplinary program currently travels to Morocco, Nepal, and Ecuador for one month each, introducing students to local food, water, and energy challenges in the context of a changing climate. In updating the program following its relaunch in 2023, renewed attention was given to the food, energy, and water nexus from a comparative perspective across and within these countries. This presentation will focus on the development of experiential learning cycles for …
Challenges In Artisanal Small-Scale Gold Mining: Perspectives And Transformations To Sustainability Along Br-163 In Brazil,
2025
University of São Paulo, Department of Mining and Petroleum Engineering, Brazil
Challenges In Artisanal Small-Scale Gold Mining: Perspectives And Transformations To Sustainability Along Br-163 In Brazil, Carlos Henrique Xavier Araujo, Irfan Ullah, Giorgio De Tomi
Journal of Sustainable Mining
Artisanal Small-scale Gold Mining (ASGM) is a sector beset with unique and complex challenges. Recent literature highlights the growing acknowledgment of the critical need for reforms in how the ASGM industry interacts with communities and the environment. Discussions about sustainable transformations go beyond theoretical and conceptual borders, attempting to understand how local transformative events might reflect global developments. Thus, the goal of this article is to give an analysis from the perspective of the actors participating in artisanal gold mining activities. A survey was carried out along BR-163, which runs from Sinop (Mato Grosso) to Santarém (Pará). Fifty-five (55) interviews …
Magnetic And Optical Properties Of Airborne Dust Particles Nearby Coal-Fired Power Plants In Upper Silesia, Poland: A Mineralogical, Petrographical And Chemical Approach,
2025
Aristotle University of Thessaloniki, School of Geology, Greece
Magnetic And Optical Properties Of Airborne Dust Particles Nearby Coal-Fired Power Plants In Upper Silesia, Poland: A Mineralogical, Petrographical And Chemical Approach, Chrysoula Chrysakopoulou, Konstantinos Perleros, Małgorzata Wojtaszek-Kalaitzidi, Lambrini Papadopoulou, Nikolaos Kantiranis, Stavros Kalaitzidis
Journal of Sustainable Mining
Coal mining and exploitation pose certain challenges in terms of environmental management. The objective of this research is the study of airborne dust from Knurow region, Southern Poland, aiming to identify the level and the features of anthropogenic particles, mostly in the form of fly ash. Two samples collected from a domestic gutter system were analysed regarding their mineralogical, chemical and petrographical features, emphasizing the magnetic fraction and the carbonized organic particles. The airborne dust contains 22 wt.% of fossil and fresh organic matter, whereas the major mineralogical phase is magnetite. The magnetic fraction (up to 3 wt.%) appears in …
