Evaluation On Spatiaotemporal Variations Of Mine Water Quality And Water Source Identification Based On Key Dominant Factors In Loess Hilly And Gully Region,
2023
College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Evaluation On Spatiaotemporal Variations Of Mine Water Quality And Water Source Identification Based On Key Dominant Factors In Loess Hilly And Gully Region, Shi Longqing, Qu Xingyue, Han Jin
Coal Geology & Exploration
It is difficult to accurately identify the sources of water inrush between sandstone-mudstone interbedded overburden in loess hilly and gully region, and these proportions of different water sources cannot be quantified. For this reason. Based on the systematic collection of surface water and groundwater samples from Zhujiamao Coal Mine in northern Shaanxi. This study revealed the hydrochemical evolution laws of water quality and the recharge relationship of various aquifer systems by mathematical statistics, Piper (trilinear) diagram, Gibbs diagram and the conventional hydrochemical characteristic method. Meanwhile, this study analyzed the evolution characteristics of stable isotopic composition in water, clarified the spatial …
Progress Of Research On Key Technologies For Hydrogeochemical Prospecting In North China Type Coalfield,
2023
School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China
Progress Of Research On Key Technologies For Hydrogeochemical Prospecting In North China Type Coalfield, Chen Luwang, Hu Yongsheng, Zhang Jie, Zhang Miao, Zheng Jian, Zheng Xin, Zhang Yuanyuan, Cai Xinyue, Wu Minghui
Coal Geology & Exploration
North China type coalfield is an important coal base in China, and hydrogeochemical prospecting is an important means to solve a series of hydrogeological problems in the process of coal mining. The typical hydrogeological problems under the influence of mining were analyzed based on the generalization of the typical hydrogeological structure of North China type coalfield. Meanwhile, the multi-field coupling relationship of groundwater and the mechanism of hydrogeochemical prospecting in North China type coalfield, as well as its testing, analysis and treatment technology, were revealed. Besides, the reliability of hydrogeochemical prospecting technology in North China type coalfield was pointed out …
Effect Of Foliar Application Of Dse Fungal Solution On Growth Of Morus Alba And Its Prospects Of Ecological Restoration Application,
2023
Institute of Ecological Environment Restoration in Mine Area of West China, Xi’an University of Science and Technology, Xi’an 710054, China; Institute of Mine Ecological Environment Restoration, China University of Mining and Technology (Beijing), Beijing 100083, China
Effect Of Foliar Application Of Dse Fungal Solution On Growth Of Morus Alba And Its Prospects Of Ecological Restoration Application, Bi Yinli, Wang Zhuoyou, Ke Zengming
Coal Geology & Exploration
Microbial reclamation technology has been widely used in the ecological restoration of western arid and semi-arid coal mining areas. Convenient application of microbial agent has important significance for improving the efficiency of ecological management in coal-mining subsidence. Herein, this study tested with Morus alba as the study object, and the dark septate endophyte (DSE) as the test fungus. using a greenhouse pot experiment with three treatments, which including the root inoculation of DSE fungus (GXZR), foliar application of DSE fungus (YMTM) and control Morus alba (CK), this study investigated the effects of different inoculation methods on the growth of Morus …
Progress And Typical Case Analysis Of Demonstration Projects Of The Geological Sequestration And Utilization Of Co2,
2023
Jiangsu Key Laboratory of Coal-based Greenhouse Gas Control and Utilization, China University of Mining and Technology, Xuzhou 221008, China; Carbon Neutrality Institute, China University of Mining and Technology, Xuzhou 221008, China
Progress And Typical Case Analysis Of Demonstration Projects Of The Geological Sequestration And Utilization Of Co2, Liu Shiqi, Huang Fansheng, Du Ruibin, Chen Shiheng, Guan Yiting, Liu Yinghai, Wang Tao
Coal Geology & Exploration
The implementation of the geological sequestration and utilization of CO2 (CGSU) has considerable effects on CO2 emission reduction and is of great significance for the mitigation of global warming and the execution of the sustainable development strategy in China. Therefore, this study sorted the major methods for CGSU, made statistics of the global demonstration projects of CGSU, and primarily introduced the typical demonstration projects of CGSU in China. Furthermore, this study proposed prospects for the development trend of the CGSU technologies, which primarily include CO2 enhanced oil recovery (CO2-EOR), CO2 enhanced coalbed methane recovery …
Evaluation Method Of Resistance To Seepage Failure Due To Mining Near Unconsolidated Aquifers I: Critical Hydraulic Gradient,
2023
School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China
Evaluation Method Of Resistance To Seepage Failure Due To Mining Near Unconsolidated Aquifers I: Critical Hydraulic Gradient, Sui Wanghua
Coal Geology & Exploration
The evaluation on resistance to seepage failure is an important fundamental work for the prevention and control of water-sand mixture inrush during coal mining near the unconsolidated aquifers. However, no normative methods and standards have been developed at present. The key to evaluate the resistance to seepage failure of unconsolidated aquifers and weathered zones is to determine their hydraulic gradient and the critical hydraulic gradient. Herein, this study reviewed the determination method of critical hydraulic gradient for soil flow and internal erosion, and pointed out the different characteristics between the critical hydraulic gradient for water-sand mixture inrush near unconsolidated aquifers …
Micro-Mechanism Of Geological Sequestration Of Co2 In Coal Seam,
2023
School of Energy Resources, China University of Geosciences (Beijing), Beijing 100083, China; Coal Reservoir Laboratory of National Engineering Research Center of CBM Development & Utilization, Beijing 100083, China
Micro-Mechanism Of Geological Sequestration Of Co2 In Coal Seam, Yao Yanbin, Sun Xiaoxiao, Wan Lei
Coal Geology & Exploration
The geological sequestration of CO2 in coal seam is a most promising carbon storage technology, which can help achieve the dual goals of CO2 emission reduction and coalbed methane stimulation. Compared with other sealing geological bodies, coal has extremely well-developed micropores. The mechanism of geological sequestration of CO2 in coal seam is closely related to the interaction of coal-gas-water. However, its internal influence mechanism is still unclear. Herein, the models of macromolecular structure and plat pore of the coals were constructed based on the systematic coal petrological analysis and testing of two bituminous coal samples. Meanwhile, the …
Characteristics And Formation Mechanisms Of Microstructures In Coal Treated With Co2 Phase Transition Fracturing,
2023
School of Resources & Environment, Henan Polytechnic University, Jiaozuo 454003, China; Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region, Jiaozuo 454003, China; Henan International Joint Laboratory for Unconventional Energy Geology and Development, Jiaozuo 454003, China; Gas Geology and Engineering Research Center, Henan Polytechnic University, Jiaozuo 454003, China
Characteristics And Formation Mechanisms Of Microstructures In Coal Treated With Co2 Phase Transition Fracturing, Cao Yunxing, Zhang Xinsheng, Zhang Junsheng, Guo Shuaifang, Meng Bingbing
Coal Geology & Exploration
CO2 phase transition fracturing (CPTF) is a newly developed technique for coal mine gas control and is characterized by high efficiency, high coal seam permeability, a high gas drainage rate, and outburst elimination. The core of CPTF is reinforced fracturing and the pressure-relief and permeability-enhancement effects of coal seams under high-pressure dynamic loading. Nevertheless, there is a lack of studies on the morphological characteristics and formation mechanisms of newly formed fractures. Current observation and description of the underground fractures on a centimeter-meter scale primarily aim to reveal the fracturing and permeability-enhancement mechanisms of low-permeability coal seams. However, the study …
Structure Optimization And Coal Breaking Effect Of Air Jet Nozzle For Post-Mixed Abrasive,
2023
Henan Energy Group Limited, Zhengzhou 450046, China
Structure Optimization And Coal Breaking Effect Of Air Jet Nozzle For Post-Mixed Abrasive, Yang Heng, Wei Jianping, Cai Yubo, Zhang Lulu, Liu Yong
Coal Geology & Exploration
Hydraulic pressure relief and penetration enhancement technology plays an important role in coal seam gas hozard control, but it is easy to lead to dynamic phenomena such as hole collapse, drill holding and hole spraying during its application in the soft coal seams. Non-hydraulic pressure relief and penetration enhancement is one of the feasible technologies to break through the bottleneck of efficient gas extraction technology in soft coal seams. To this end, the post-mixed abrasive air jet coal breaking and pressure relief technology was proposed with the efficient coal breaking capability of abrasive air jet. Specifically, the abrasive and air …
Structural Characteristics Of Adsorption Pores In Low-Rank Coals And Their Effects On Methane Adsorption Performance,
2023
College of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China; Western Engineering Research Center of Mine Gas Intelligent Drainage for Coal Industry, Xi’an 710054, China
Structural Characteristics Of Adsorption Pores In Low-Rank Coals And Their Effects On Methane Adsorption Performance, Li Shugang, Zhou Yuxuan, Hu Biao, Qin Xueyan, Kon Xiangguo, Bai Yang, Zhang Jingfei
Coal Geology & Exploration
The study of the CH4 adsorption characteristics of low-rank coals is of great significance for gas content prediction, gas drainage, and hazard prevention. Therefore, this study selected six typical low-rank coal samples from coal mines in Shaanxi Province, on which low-temperature N2 adsorption experiments, low-pressure CO2 adsorption experiments, and CH4 isothermal adsorption experiments were carried out. As a result, the structural characteristics of adsorption pores in low-rank coals were obtained. Moreover, this study quantitatively characterized the relationships between the parameters of CH4 adsorption characteristics and those of adsorption pore structure using the micropore filling and …
An Evaluation Method For Geological Dynamic Environments Of Mines And The Classification Of Mines Subjected To Rock Bursts,
2023
College of Mining, Liaoning Technical University, Fuxin 123000, China; Ordos Research Institute of Liaoning Technical University, Ordos 017010, China
An Evaluation Method For Geological Dynamic Environments Of Mines And The Classification Of Mines Subjected To Rock Bursts, Lan Tianwei, Zhang Zhijia, Yuan Yongnian, Han Jun, Liu Hongquan, Zhang Junjie, Zhang Hongwei, Luo Boyuan, Liu Mingwei
Coal Geology & Exploration
The occurrence of dynamic disasters in mines, such as rock bursts, is affected by multiple factors and is the result of the coupling of the natural geological dynamic environment and mining engineering disturbances. The characteristics of rock bursts including their time, space, and intensity are related to the regional geological dynamic environment of mines. Different coal fields, mining areas, and mines have different regional geological dynamic environments. Accordingly, some coal mines do not have a geological dynamic environment of rock bursts, while some are subjected to different types of rock bursts. This study proposed an evaluation method for the geological …
Coal And Gas Outburst Mechanism: Research Progress And Prospect In China Over The Past 70 Years,
2023
School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China;
Key Laboratory of Gas and Fire Control for Coal Mines, Ministry of Education, Xuzhou 221116, China
Coal And Gas Outburst Mechanism: Research Progress And Prospect In China Over The Past 70 Years, Zhang Chaolin, Wang Peizhong, Wang Enyuan, Xu Jiang, Li Zhonghui, Liu Xiaofei, Peng Shoujian
Coal Geology & Exploration
The effective prevention and control of coal and gas outbursts have always been a challenge for safe coal mining in China, and their prerequisite and basis are in-depth research on the coal and gas outburst mechanism. This study expatiated the efforts and achievements of China made in research on the coal and gas outburst mechanism over the past 70 years, which can be divided into four stages, namely active exploration (1955‒1977), the establishment of the theoretical foundation (1978‒2002), rapid development (2003‒2015), and stable development (2016 to the present). This study explored the hot research topics and frontier trends of the …
Characteristics And Coal-Controlling Effects Of Structures In The Zhundong Coalfield,
2023
Jiangsu Key Laboratory of Coal-based Greenhouse Gas Control and Utilization, China University of Mining and Technology, Xuzhou 221008, China; College of Geology and Mining Engineering, Xinjiang University, Urumqi 830046, China; Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process of the Ministry of Education, China University of Mining and Technology, Xuzhou 221116, China
Characteristics And Coal-Controlling Effects Of Structures In The Zhundong Coalfield, Wang Meng, Ma Ruying, Shan Yadi, Yan Yichao
Coal Geology & Exploration
The coal controlling of structures is critical to mining safety. However, few studies have been conducted on the structures of the Zhundong coalfield according to existing data. To ensure safe and efficient coal mining, it is necessary to conduct a study targeting the geological conditions for the coal mining of the coalfield. This study investigated the structural characteristics of the Zhundong coalfield. Based on the statistics of the fault structures, this study quantitatively characterized the structural complexity of the coalfield using fractal dimension, explored the current structural characteristics and tectonic dynamic genesis of the structures in Zhundong coalfield, and analyzed …
The Toxicology Of Particulate Matter Emitted From Coal Combustion And The Geological Origin Of Lung Cancer Epidemic In Xuanwei City, Yunan Province, China,
2023
School of Geosciences & Survey Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China
The Toxicology Of Particulate Matter Emitted From Coal Combustion And The Geological Origin Of Lung Cancer Epidemic In Xuanwei City, Yunan Province, China, Shao Longyi, Zhang Mengyuan, Feng Xiaolei, Jiao Jiewei, Wang Wenhua, Zhou Yiping
Coal Geology & Exploration
Xuanwei City in Yunnan Province is the area struck by the most severe lung cancer in China, with the incidence and mortality of lung cancer ranking first in the world. The study of genomics of lung cancer patients has shown that lung cancer in Xuanwei City has distinctive genetic characteristics and a unique incidence mode related to the environment. This study reviewed the epidemiological characteristics of the lung cancer epidemic in Xuanwei, as well as the level of pollution and toxicological characteristics of emissions from coal combustion. Moreover, this study discussed the geological origins of the lung cancer epidemic in …
Orientation And Major Research Problems Of Coal Geological Exploration In China Under New Conditions,
2023
China Administration of Coal Geology, Beijing 100038, China
Orientation And Major Research Problems Of Coal Geological Exploration In China Under New Conditions, Wang Tong, Han Xiaozhong, Deng Jun, Sun Yajun, Li Zengxue, Tang Shuheng, Mao Shanjun, Lin Zhongyue, Li Congcong, Zhao Xin, Sun Jie, Song Hongzhu, Zhang Biao, Meng Fanbin, Wu Zhaojian, Deng Xiaoli, Jiang Tao
Coal Geology & Exploration
Coal is a major energy source in China and an important raw material in the coal chemical industry in the country. Over the past 70 years since the founding of New China, coal geological exploration has been carried out in close combination with the national strategic demand, discovering the urgently needed coal resources for the country and ensuring the sufficient supply of national coal energy. This paper systematically summarizes the primary achievements made in coal geological surveys in recent years, analyzes the major research problems with the development of coal geological exploration under the current new conditions, and positions coal …
Geothermal Energy Exploitation And Storage In Coal Field Under The Dual Carbon Goal,
2023
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;Innovation Academy for Earth Science, CAS, Beijing 100029, China;College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Geothermal Energy Exploitation And Storage In Coal Field Under The Dual Carbon Goal, Wang Jiyang, Kong Yanlong, Duan Zhongfeng, Zhang Jixiong, Luo Xilian, Huang Yonghui, Luo Naning, Cheng Yuanzhi, Zhou Nan, Zhang Weizun, Pang Zhonghe
Coal Geology & Exploration
The development of geothermal energy in coalfield can not only improve the temperature environment of coal mining, but also turn waste into treasure through the clean utilization of geothermal energy. Especially, it is of great prospect to store energy in the mined-out area of coalfield under the “dual carbon” goal at present. Herein, in this paper, it was estimated that the geothermal reserves in the main coal-bearing areas of China were 1.12 × 1019 kJ, equivalent to 379.539 billion tons of standard coal, and the recoverable geothermal reserves were 1.71 × 1018 kJ, equivalent to 56.931 billion tons …
Infrasound Detection Of Approaching Lahars,
2023
Boise State University
Infrasound Detection Of Approaching Lahars, J B. Johnson, A Roca, A Pineda, R Mérida, R. Escobar-Wolf, J F. Anderson, J Mock, A Bosa, G Bejar, G. P. Waite
Michigan Tech Publications, Part 1
Infrasound may be used to detect the approach of hazardous volcanic mudflows, known as lahars, tens of minutes before their flow fronts arrive. We have analyzed signals from more than 20 secondary lahars caused by precipitation events at Fuego Volcano during Guatemala's rainy season in May through October of 2022. We are able to quantify the capabilities of infrasound monitoring through comparison with seismic data, time lapse camera imagery, and high-resolution video of a well-recorded event on August 17. We determine that infrasound sensors, deployed adjacent to the lahar path and in small-aperture (10 s of meters) arrays, are particularly …
Review Of Current Coal Rib Control Practices,
2023
Missouri University of Science and Technology
Review Of Current Coal Rib Control Practices, Dogukan Guner, Samuel Nowak, Taghi Sherizadeh, Maurice Sunkpal, Khaled Mohamed, Yuting Xue
Mining Engineering Faculty Research & Creative Works
The instability of coal ribs in underground mines continues to result in the injuries and fatalities of mine workers. The proper estimation and evaluation of primary and secondary support for coal ribs is still a challenging problem in the field of ground control science and requires further research and study. Although mining operations have various support design criteria and support methodologies for strata control, most rib support designs are still based on experience and local practices. This review study is intended to summarize the currently applied practices for rib support and control in various countries and mining conditions. Firstly, critical …
Review Of Current Coal Rib Control Practices,
2023
Missouri University of Science and Technology
Review Of Current Coal Rib Control Practices, Dogukan Guner, Samuel Nowak, Taghi Sherizadeh, Maurice Sunkpal, Khaled Mohamed, Yuting Xue
Mining Engineering Faculty Research & Creative Works
The instability of coal ribs in underground mines continues to result in the injuries and fatalities of mine workers. The proper estimation and evaluation of primary and secondary support for coal ribs is still a challenging problem in the field of ground control science and requires further research and study. Although mining operations have various support design criteria and support methodologies for strata control, most rib support designs are still based on experience and local practices. This review study is intended to summarize the currently applied practices for rib support and control in various countries and mining conditions. Firstly, critical …
Review Of Current Coal Rib Control Practices,
2023
Missouri University of Science and Technology
Review Of Current Coal Rib Control Practices, Dogukan Guner, Samuel Nowak, Taghi Sherizadeh, Maurice Sunkpal, Khaled Mohamed, Yuting Xue
Mining Engineering Faculty Research & Creative Works
The instability of coal ribs in underground mines continues to result in the injuries and fatalities of mine workers. The proper estimation and evaluation of primary and secondary support for coal ribs is still a challenging problem in the field of ground control science and requires further research and study. Although mining operations have various support design criteria and support methodologies for strata control, most rib support designs are still based on experience and local practices. This review study is intended to summarize the currently applied practices for rib support and control in various countries and mining conditions. Firstly, critical …
Diagnostic Gold Deportment Studies And Leaching Behaviour Of Small-Scale Gold Mining Tailings From Eastern Region, Ghana,
2023
Department of Environmental and Safety Engineering, University of Mines and Technology, Tarkwa, Ghana
Diagnostic Gold Deportment Studies And Leaching Behaviour Of Small-Scale Gold Mining Tailings From Eastern Region, Ghana, Ishmael Quaicoe, Martin Beyuo, Solomon Quaicoe, Nikao A. Lasidzi
Journal of Sustainable Mining
Artisanal and small-scale gold mining (ASGM) sector employs about 80% of the mining workforce but only contributes about 20-30% of Ghana’s gold production. The low gold production is linked to low recoveries associated with the activities because ofinadequate understanding of the chemical, mineralogical and metallurgical characteristics of the ores. This study examined the metallurgical characteristics of typical small-scale gold mining tailings to understand their grinding characteristics, gold deportment and cyanidation behaviour. The gold deportment results showed that 96.1% of the gold in the samples is free milling (can be leached directly with cyanide and recovered through carbon adsorption), whilst the …
