A Tin-Gtp Algorithm-Based Technique For 3d Geological Modeling Of Coal Mines,
2024
China Coal Research Institute, Beijing 100013, China; CCTEG Xi’an Research Institute (Group) Co., Ltd., Xi’an 710077, China; Xi’an CCTEG Transparent Geology Technology Co., Ltd., Xi’an 712000, China; State Key Laboratory of Intelligent Coal Mining and Strata Control, Beijing 100013, China
A Tin-Gtp Algorithm-Based Technique For 3d Geological Modeling Of Coal Mines, Wang Xiaohui, Liu Zaibin, Zhang Dongliang, Ma Liang, Chen Baohui, Lei Xiaorong, Bai Baojun, Yan Junsheng
Coal Geology & Exploration
Background A 3D geological model of a coal mine serves as an essential prerequisite to guiding the safe and efficient production of coal mines, holding great significance for precise coal mining and geological guarantee. Especially in complex geologic conditions, the failure of geological models to accurately describe the relationship between structures and strata will affect the mining area planning, mining processes, and production efficiency during the production of coal mines. Methods With the Qipanjing Coal Mine in the Zhuozishan Coalfield, Inner Mongolia, as an example, this study investigated the technology for high-accuracy 3D geological modeling of coal mines based on …
Accumulation Mechanisms And Resource Potential Of Helium In Coal Measures: A Case Study Of The Eastern Margin Of The Ordos Basin,
2024
Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China
Accumulation Mechanisms And Resource Potential Of Helium In Coal Measures: A Case Study Of The Eastern Margin Of The Ordos Basin, Liu Xiangbai, Tao Shizhen, Yang Xiuchun, Zhao Qun, Chen Yanyan, Liu Ziyang, Pei Xiangbing, Wang Longfei, Yi Wei, Feng Jianqiu, Zhang Tan, Gao Jianrong, Tao Xiaowan, Liu Zhuangxiaoxue, Li Chaozheng, Yang Yiqing, Chen Yue
Coal Geology & Exploration
Background Helium, with advantages such as stable chemical properties and high thermal conductivity, has been extensively applied in high-tech sectors like national defense, military, aviation, and aerospace, playing an irreplaceable role. Presently, helium in China is primarily imported from other countries, manifesting a high degree of dependence on foreign trade, suggesting a prominent issue concerning helium resource security. Previous studies on helium principally focus on conventional natural gas, rendering helium in coal measures relatively under-studied. Objective and Methods To determine the distribution and potential of helium resources in coal measures, this study analyzed the coal-measure gas sampled from the eastern …
Coal Permeability Enhancement Via Cyclic Percussion Using Low-Temperature Liquid Co2 And High-Temperature Water Vapor And Simulations Of Resultant Gas Drainage Performance,
2024
College of Safety Science and 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 University of Science and Technology, Xi’an 710054, China
Coal Permeability Enhancement Via Cyclic Percussion Using Low-Temperature Liquid Co2 And High-Temperature Water Vapor And Simulations Of Resultant Gas Drainage Performance, Qin Lei, Wang Ping, School Of Civil And Resource Engineering, University Of Science And Technology Beijing, Beijing 100083, China Shugang, Wang Hui, Liu Pengfei, Li Jiawei, Lin Haifei
Coal Geology & Exploration
Objective In the application of the coal seam permeability enhancement technique based on liquid CO2, pore water in coal seams freezes due to low temperatures, blocking pathways for gas migration. Hence, this study developed a technique for coal permeability enhancement through cyclic percussion using low-temperature liquid CO2 and high-temperature water vapor (also referred to as the cyclic cold and hot percussion). Methods This study delved into the permeability evolutionary patterns of coals under cyclic cold and hot percussion using a low-field nuclear magnetic resonance (NMR) spectrometer, an automatic coal permeability tester, a contact angle tester, and 3D …
Deep Beam Theory-Based Mechanical Analysis Of Water-Resisting Key Strata Of Coal Seam Floors In A Deep Mining Environment,
2024
School of Civil & Architecture Engineering, East China University of Technology, Nanchang 330013, China
Deep Beam Theory-Based Mechanical Analysis Of Water-Resisting Key Strata Of Coal Seam Floors In A Deep Mining Environment, Wang Bingwen, Zha Wenhua, Lu Haifeng
Coal Geology & Exploration
Objective An increase in the mining depth of mines poses a more serious threat from highly confined karst water, resulting in water hazards like water inflow and inrushes on the mining faces of coal seams. The key content used to address this issue is to analyze the water pressure resistance of the water-resisting key stratum of the coal seam floor in a deep mining environment. Methods This study simplified a water-resisting key stratum into a rock beam model and then dealt with this model using the deep beam theory in the prediction of water inrushes in deep mining. Specifically, by …
Fracture Mechanical Criteria And Simulation Of Floors With Y-Shaped Branches Of Major Faults In Coal Mines,
2024
School of Civil Engineering and Architecture, Xi’an University of Science and Technology, Xi’an 710054, China; Shaanxi Key Laboratory of Coal Mine Water Hazard Prevention and Control Technology, Xi’an 710077, China
Fracture Mechanical Criteria And Simulation Of Floors With Y-Shaped Branches Of Major Faults In Coal Mines, Li Ang, Sun Jingxin, Zhang Wenzhong, Zhang Zhuang, Yang Yuxuan, Wang Weidong, Lyu Wei, Fan Liuyi
Coal Geology & Exploration
Objective Despite wide distribution, the branches of major faults (also referred to as the fault branches) tend to be overlooked. However, they represent one of the primary causes of water inrush. Methods Under the engineering geological background of the Liuzhuang coal mine in Anhui Province, this study established a fracture mechanical disaster model for fault branches under the impacts of both seepage and stress based on the criteria for compression-shear fracture of rock masses considering the Mohr-Coulomb criterion. Using this model, this study obtained the critical water pressure and the minimum safe distance between the fault branch and the floor's …
Elastoplastic Stress Analysis Of Multi-Refrigerant Combined Heterogeneous Artificial Frozen Wall,
2024
School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China; Postdoctoral Research Station , China Coal Mine Construction Group Co., Ltd., Hefei 230091, China; Henan Key Laboratory of Underground Engineering and Disaster Control, Henan Polytechnic University, Jiaozuo 454000, China
Elastoplastic Stress Analysis Of Multi-Refrigerant Combined Heterogeneous Artificial Frozen Wall, Wang Bin, Liang Xiuling, Zhang Zihao, Cai Haibing, Rong Chuanxin
Coal Geology & Exploration
Objective Affected by the temperature difference of the refrigerant and the distance difference between the frozen formation and the freezing pipes, the heterogeneity of the multi-refrigerant combined double-row-pipe frozen wall is more significant. In order to evaluate the safety of such frozen wall reasonably, the elastic plastic stress analysis should be carried out for the artificial frozen wall with multi-refrigerant considering the heterogeneity. Methods The frozen wall at 1/4 pipe distance was selected as the characteristic section. Then, the temperature distribution curve on this section was equivalently converted to three linear functions, and the frozen wall was regarded as a …
Analytical Model For Reactive Solute Transport In A Channel-Matrix System,
2024
School of Earth and Environment, Anhui University of Science & Technology, Huainan 232001, China
Analytical Model For Reactive Solute Transport In A Channel-Matrix System, Wei Nana, Li Xu, Xu Guangquan, Zhang Haitao, Shao Zefan
Coal Geology & Exploration
Objective The accurate quantitative characterization of fractured media and the theoretical research on solute transport in fractured media have become the key to the prevention and control of groundwater contamination in fractured aquifers. Currently, fractured aquifers are generalized to horizontal fractures, ignoring the geometric characteristics of the open parts of fractures, called channels, and the impacts of matrix diffusion on solute transport. Methods A model for solute transport in a single channel-matrix system was established, obtaining the semi-analytical solutions using Laplace and numerical inverse transforms. The COMSOL Multiphysics software was employed to construct a numerical model for verification. Furthermore, the …
Landslide Sensitivity Assessment Of Coal Mining Subsidence Areas Based On Information Value - Machine Learning Coupling Models,
2024
Beijing Institute of Geological Disaster Prevention and Control, Beijing 100120, China; School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100083, China
Landslide Sensitivity Assessment Of Coal Mining Subsidence Areas Based On Information Value - Machine Learning Coupling Models, Niu Chenhao, Jiao Runcheng, Han Jianfeng, Wang Shengyu, Guo Xuefei, Liu Chang, Han Yucheng, Song Guofeng
Coal Geology & Exploration
Objective Due to their special geological conditions and coal mining background, coal mining subsidence areas are prone to suffer from ground cracks and subsidence, which tend to further induce geological disasters such as landslides. This makes it extremely necessary to conduct landslide sensitivity assessment of these areas using appropriate influencing factors and training models. Methods This study investigated the Xishan coal mine area in Beijing as an example to conduct landslide sensitivity assessment of coal mining subsidence areas by coupling slope units with mathematical statistical and machine learning models. With 10 influencing factors, including topographic and geomorphic factors such as …
Research And Application Of The Seismic Exploration Technique Using Reflected In-Seam Waves In Identifying Folds And Faults In Coal Seams,
2024
Xi’an Research Institute Co., Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China
Research And Application Of The Seismic Exploration Technique Using Reflected In-Seam Waves In Identifying Folds And Faults In Coal Seams, Wu Guoqing
Coal Geology & Exploration
Background Accurately identifying subsurface anomalies is crucial to building a geological transparency system in the transformation to intelligent coal mines. The precise exploration of fold anomalies is a challenge of underground geophysical exploration technology, holding great significance for reducing excavation costs, mining difficulties, and safety risks. Objective and Methods Previous in-seam seismic explorations reveal that folds pose significant impacts on the propagation characteristics of in-seam waves. However, conventional inversion techniques of in-seam waves are difficult to distinguish folds from faults. This study constructed numerical models for faults and folds with similar geometric shapes and equal exploration distances. Specifically, the differences …
A Method For Reconstructing Consecutively Missing Seismic Data Based On Recurrent Feature Reasoning,
2024
School of Artificial Intelligence, Hebei University of Technology, Tianjin 300401, China
A Method For Reconstructing Consecutively Missing Seismic Data Based On Recurrent Feature Reasoning, Li Zijuan, Chang Guangyao, Jia Yongna
Coal Geology & Exploration
Objective Due to the constraints of natural environments like rapids, rifts, and high mountains, the acquired seismic data are often challenged by consecutive missing, affecting subsequent seismic data processing and geologic analysis. Hence, it is necessary to reconstruct the missing data through interpolation. Methods This study proposed a method for reconstructing consecutively missing seismic data based on recurrent feature reasoning. First, the missing seismic data undergo partial convolution operations, in which the weight of the convolution results is adaptively adjusted based on the proportion of valid feature map data in the receptive field, avoiding invalid convolution operations on consecutively missing …
A Neural Network-Based Method For Analyzing Diffracted Wave Velocity,
2024
College of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
A Neural Network-Based Method For Analyzing Diffracted Wave Velocity, Tao Junhong, Zhao Jingtao, Sheng Tongjie
Coal Geology & Exploration
Background In seismic imaging, accurate velocity models are crucial for characterizing subsurface structures in a fine-scale manner. Notably, in coal mining, small-scale geological structures like faults and collapse columns are closely associated with mining accidents. These structures typically occur as diffracted waves in seismograms.Objective and Methods To effectively image these small-scale geological bodies, fine-scale velocity modeling using diffracted wave information is particularly important. Hence, this study proposed a neural network-based method for analyzing diffracted-wave velocity. First, diffracted-wave velocity spectra were generated using the gathers of diffracted waves that were separated in the common virtual source domain. Second, a gamma-ray …
Key Technology And Practice Of Deep Borehole Pneumatic Directional Drilling In Broken-Soft Coal Seam In Yangquan Mining Area,
2024
CCTEG Xi’an Research Institute (Group) Co., Ltd., Xi’an 710077, China
Key Technology And Practice Of Deep Borehole Pneumatic Directional Drilling In Broken-Soft Coal Seam In Yangquan Mining Area, Liu Fei, Li Quanxin, Fang Jun, Liu Jianlin, Yang Weifeng, Chu Zhiwei, Zhao Jianguo, Wang Siyi
Coal Geology & Exploration
Objective In response to the need for precise, proactive, and regional management of gas in the broken-soft coal seam of the Yangquan Mining Area, a technical scheme utilizing pneumatic directional drilling for pre-drainage boreholes was proposed. Methods Based on the analysis of the technical challenges in pneumatic directional drilling, a series of technologies suitable for the broken-soft coal seam in the Yangquan Mining Area were developed. These include stable operation technology for pneumatic downhole motors, precise control technology for drilling boreholes, efficient deep-hole slag discharge technology, and pneumatic milling and salvage technology. The pneumatic directional drilling equipment was optimized, and …
Emergency Response And Critical Technologies For Large-Diameter Boreholes In Mine Rescue Through Surface Drilling,
2024
National Mine Emergency Rescue Shandong Special Survey Team, Jining 272100, China; College of Petroleum Engineering, China University of Petroleum (Beijing), Beijing 102249, China; Key Laboratory of Mine Drilling and Rescue, Department of Emergency Management of Shandong Province, Jining 272100, China; The Second Exploration Team of Shandong Bureau of Coal Geology, Jining 272100, China
Emergency Response And Critical Technologies For Large-Diameter Boreholes In Mine Rescue Through Surface Drilling, Ma Tan, Zhuge Lei, Zhao Weidong
Coal Geology & Exploration
Objective Large-diameter lifesaving holes have been successfully applied multiple times in mine rescue through surface drilling. However, they show limitations in emergency response like quick dispatch and cross-regional rescue, and their technological adaptability is insufficient to cope with complex strata. Methods From the perspective of overall emergency rescue, with rescue timeliness as an indicator, this study summarized the critical technologies like response capability enhancement and borehole-forming technology for complex strata. It constructed an emergency handling process for mine rescue through surface drilling, specified the improvements in contingency plan activation, response actions, and response speeds, and established the hierarchical cross-regional rescue …
Accumulation Patterns And Exploitation And Utilization Targets Of Geothermal Resources In The Coal-Bearing Area In North China,
2024
State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Accumulation Patterns And Exploitation And Utilization Targets Of Geothermal Resources In The Coal-Bearing Area In North China, Pang Zhonghe, Duan Zhongfeng
Coal Geology & Exploration
Objective China is a major producer and consumer of coal resources in the world. The urgent need for the transition of the coal industry necessitates the investigation of both the origin and distribution patterns of geothermal resources in the coal-bearing areas of the country. The coal-bearing area in North China, with geothermal reserves accounting for 74.7% of the whole country, stands out as one of the areas with the most abundant geothermal resources nationally. This area encompasses four major coal-bearing basins: the Bohai Bay, Ordos, Qinshui, and Southern North China, with the lithospheric thermal state gradually weakening from east to …
Convection - Heat Transfer Coupling Mechanism For Closed-Loop Heat Extraction From Hydrothermal Resources Using Horizontal Wells,
2024
CNOOC Gas and Power Group, Beijing 100028, China
Convection - Heat Transfer Coupling Mechanism For Closed-Loop Heat Extraction From Hydrothermal Resources Using Horizontal Wells, Gu Feng, Li Youwu, Zhang Yue, Gao Ying, Yang Peng, Wang Anran, Cui Jingyun
Coal Geology & Exploration
Objective Closed-loop heat extraction technology, which extracts geothermal energy without draining geothermal water, has emerged as a research focus in geothermal energy exploitation. However, there is a lack of studies on the impacts of convection in reservoirs on heat transfer. Methods To improve single-well heat extraction, this study proposed a technology of closed-loop heat extraction from hydrothermal reservoirs using horizontal wells. This technology aims to increase the contact area between wellbores and reservoirs while fully leveraging the convection in reservoirs. A flow and heat transfer model characterized by the coupling of horizontal wells, circulating water and reservoirs was established to …
A Brighter Tomorrow With Darker Skies: Understanding The Consequences Of Excessive Light And Combating Light Pollution At West Chester University,
2024
West Chester University
A Brighter Tomorrow With Darker Skies: Understanding The Consequences Of Excessive Light And Combating Light Pollution At West Chester University, Finn Schmidhuber
Sustainability Research & Practice Seminar Presentations
Finn Schmidhuber, Computer Science '25, presents on the importance of Dark Skies and limiting light pollution.
Climate Smart Agriculture,
2024
University of Nebraska-Lincoln
Climate Smart Agriculture, J. David Aiken
Cornhusker Economics
There are several programs encouraging producers to reduce their carbon intensity, including United States Department of Agriculture climate-smart agriculture programs, the 2024 Nebraska Climate Action Plan, and the 2024 Nitrogen Reduction Incentive Act. The hope is that producers with lower carbon intensity (CI) scores will receive a premium for their products. Producers would be well advised to learn more about these programs, as reducing carbon intensity in agriculture seems to be an emerging agricultural policy trend that will be with us for some time to come.
Coastal Wetland Hydrology Under Climate Change: Dynamics, Consequences, And Eco-Geomorphologic Feedbacks,
2024
Los Alamos National Lab
Coastal Wetland Hydrology Under Climate Change: Dynamics, Consequences, And Eco-Geomorphologic Feedbacks, Yu Zhang
Sustainability Seminar Series
Coastal wetlands, some of the Earth's most valuable ecosystems, face unprecedented threats due to the accelerating impacts of climate change—sea-level rise, saltwater intrusion, hurricanes, and storm surges. These forces are fundamentally altering the ecosystem functions, threatening their survival. Will these ecosystems adapt and persist, or are they doomed to disappear? In this talk, Dr. Yu Zhang explores this critical question through an integrated hydrologic and eco-geomorphologic lens. By examining the dynamic interactions between water, vegetation, and landforms, Dr. Zhang's research offers new insights into the potential futures of coastal wetlands and the intricate feedbacks that may shape their resilience in …
Business Failure Mode And Effects Analysis: A Risk Based Holistic Strategy To Improve Success Rates Of Small Technology Businesses,
2024
University of South Florida
Business Failure Mode And Effects Analysis: A Risk Based Holistic Strategy To Improve Success Rates Of Small Technology Businesses, Krishnakumar R. Nair
USF Tampa Graduate Theses and Dissertations
Multiple US and global statistics show that small businesses are vital to economic development but fail at a startling rate. Small technology businesses (STBs) are around 35% of this small business segment. The central problem addressed in this research is to reduce their short lives and enable growth and stability. The solution is a significant business management strategy iteratively developed by working with business owners and practitioners. A holistic approach to view the business as a whole to address premature failures is not available, and this research presents a comprehensive approach to solving that problem. The study developed a novel …
Mutual Empowerment And Synergies For Enhanced Outcomes: Pioneering A New Paradigm For Biodiversity Conservation—Significance Of Man And The Biosphere Programme For China And The World,
2024
Ministry of Ecology and Environment of the People’s Republic of China, Beijing 100006, China
Mutual Empowerment And Synergies For Enhanced Outcomes: Pioneering A New Paradigm For Biodiversity Conservation—Significance Of Man And The Biosphere Programme For China And The World, Baotong Dong
Bulletin of Chinese Academy of Sciences (Chinese Version)
The core of the Man and the Biosphere Programme (MAB) lies in promoting biodiversity conservation and sustainable development. This study discusses the significance of MAB for the management of protected areas and biodiversity conservation in China and globally, evaluates the valuable insights that MAB provides for China’s biodiversity conservation efforts, examines the supporting role of China’s conservation practices in implementing MAB methodology, and offers perspectives on future pathways to strengthen global biodiversity conservation.
