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2023

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Articles 451 - 480 of 724

Full-Text Articles in Sustainability

Ecological Natural Restoration And Its Artificial Promotion Mode In Coal Mining Area, Liu Wei, Yin Qinrui, Liu Xianghong Apr 2023

Ecological Natural Restoration And Its Artificial Promotion Mode In Coal Mining Area, Liu Wei, Yin Qinrui, Liu Xianghong

Coal Geology & Exploration

The natural ecological restoration is an important direction of the national ecological restoration policy. Taking limited artificial measures to promote the natural ecological restoration in coal mining areas is in line with the actual engineering requirements under the context of "double carbon" goal and thus has a better prospect in market application. Herein, the research results in terms of natural ecological restoration were sorted out systematically for the three main types of damaged land in the coal mining areas. Meanwhile, the concept connotation of artificial promotion of natural restoration was studied and analyzed. Besides, the governance mode by zone and …

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Hydrochemical Characteristics And Source Analysis Of Mine Water In Shallow Coal Seams In Shaanxi And Inner Mongolia Contiguous Area, Wang Yutong, Wang Hao, Wang Tiantian, Xue Jiankun, Shang Hongbo, Zhou Zhenfang Apr 2023

Hydrochemical Characteristics And Source Analysis Of Mine Water In Shallow Coal Seams In Shaanxi And Inner Mongolia Contiguous Area, Wang Yutong, Wang Hao, Wang Tiantian, Xue Jiankun, Shang Hongbo, Zhou Zhenfang

Coal Geology & Exploration

In order to study the hydrochemical characteristics and sources of mine water under the mining of shallow coal seams in the contiguous area of Inner Mongolia and Shaanxi, the hydrochemical characteristics and the formation action of mine water in this area were investigated through the study of hydrochemical characteristics, mathematical statistics, ion ratio coefficient method and the hydrogen and oxygen isotopes in combination, by collecting samples of the mine water, groundwater in different aquifers and surface water in the study area. Based on this, the main sources of mine water in the study area were identified. The results show that …

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Visco-Elastic Full-Waveform Inversion Based On Multi-Objective Function, Liang Xu, Ma Yue, Liu Chao, Chen Zhen, Jia Dongdong, Li Zhiyong, Pan Wenyong Apr 2023

Visco-Elastic Full-Waveform Inversion Based On Multi-Objective Function, Liang Xu, Ma Yue, Liu Chao, Chen Zhen, Jia Dongdong, Li Zhiyong, Pan Wenyong

Coal Geology & Exploration

Full-waveform inversion (FWI) is one of the core technologies developed in exploration geophysics. Through FWI, the subsurface velocity structures can be constructed and the attenuation parameter (the quality factor Q) model can be inverted, which is helpful to characterize the types and structures of subsurface media (such as the fluid and collapse column in collapse column). This is significant for the exploration and development of natural resources such as coal, oil and gas. Parameter crosstalk is the key difficulty of visco-elastic FWI. Due to the influences of velocity errors, the inverted Q models contain very strong crosstalk noise. To …

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Design Of Multi-Channel Continuous Cable Duct For Double-Bit Self-Balancing Drilling System, Zhao Yan, Ai Hongxin, Gao Ke, Zhang Congshan, Lyu Xiaoshu, Xie Xiaobo Apr 2023

Design Of Multi-Channel Continuous Cable Duct For Double-Bit Self-Balancing Drilling System, Zhao Yan, Ai Hongxin, Gao Ke, Zhang Congshan, Lyu Xiaoshu, Xie Xiaobo

Coal Geology & Exploration

The problems, such as low drilling efficiency, large disturbance to the hole wall and long assistance time of tripping caused by the “long arm jurisdiction” drive of the ground drilling rig to the underground drill bit, are faced during the drilling rescue of mine disaster. In order to solve these problems, the bionic self-balancing continuous cable duct drilling technology of double drill bit without drilling rig was proposed, the design of the multi-function continues cable duct is one of the key and challenging aspects of this technology. In terms of the technology, a multi-functional continuous cable duct with built-in channels …

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Development Of A Biobased Carbon Adsorbent For Treating Emerging Contaminants In Recycled Water On The International Space Station, Savanna Vacek, Madeline Carroll, Gabson Baguma Apr 2023

Development Of A Biobased Carbon Adsorbent For Treating Emerging Contaminants In Recycled Water On The International Space Station, Savanna Vacek, Madeline Carroll, Gabson Baguma

Undergraduate Research Symposium Posters

The International Space Station (ISS) operates as a closed system. Water is recycled from humidity and urine and held in a wastewater tank; part of the Water Processing Assembly (WPA). Potable treated water is used indirectly in the Sabatier Reactor.The Sabatier Reactor is a key component in the Environmental Control and Life Support System (ECLSS). Three main functions of ECLSS: water recovery, air revitalization, and oxygen generation Sabatier Reactor recently failed due to contamination of DMSO2, dimethyl sulfone, and DMSD, dimethylsilanediol. DMSO2 and DMSD are emerging contaminants that are not removed by the media used in the WPA due to …

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A Preliminary Evaluation Method For Coal-Based Graphite, Liu Kang, Ning Shuzheng, Cao Daiyong, Wu Guoqiang, Wang Lu, Lin Zhongyue, Wang Anmin Apr 2023

A Preliminary Evaluation Method For Coal-Based Graphite, Liu Kang, Ning Shuzheng, Cao Daiyong, Wu Guoqiang, Wang Lu, Lin Zhongyue, Wang Anmin

Coal Geology & Exploration

Coal-based graphite is a type of strategic mineral resource and has unique advantages in the fields such as nuclear graphite and military aircraft tires. The evaluation of coal-based graphite is crucial to its exploration and development, upgrading and storage increase, and strategic resource security. Owing to the continuous transition between coal-based graphite and highly metamorphosed coals, some coal-based graphite tends to be wrongly treated as blind coal, and, accordingly, the identified resources of existing coal-based graphite may have been greatly underestimated. In fact, the resources of coal-based graphite are directly related to those of high-rank coals. Therefore, it is significant …

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Study On Methane Adsorption/Desorption And Flow Law In The Nanopores Of Coal Based On Lammps, Shi Yu, Liu Yang, Xue Junhua, Li Shugang, Zhang Chao Apr 2023

Study On Methane Adsorption/Desorption And Flow Law In The Nanopores Of Coal Based On Lammps, Shi Yu, Liu Yang, Xue Junhua, Li Shugang, Zhang Chao

Coal Geology & Exploration

In this work, the influence rules of driving force, pore size, temperature and pressure on methane adsorption/desorption and flow in coal nanopores were investigated by the molecular dynamic method based on Large-scale Atomic/Molecular Massively Parallel Simulator (LAMMPS). The investigation results show that the viscosity of methane gradually decreases with the increasing driving force, while its fluidity and flow velocity increase. Meanwhile, the absolute slip length decreases and the flow tends to the non-slip state. Generally, the adsorption density of methane is independent of the driving force, but greatly affected by the gas-solid action. Methane can be adsorbed on the pore …

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Application Of Ecological Geological Layer Theory In Coal Seam Protection And Ecological Restoration—An Example Of Ecological Management Practice In Plateau Alpine Mining Areas, Wang Qingwei, Xing Xiafan, Zou Mingjun, Guo Biao, Zhao Xin, Wang Tong Apr 2023

Application Of Ecological Geological Layer Theory In Coal Seam Protection And Ecological Restoration—An Example Of Ecological Management Practice In Plateau Alpine Mining Areas, Wang Qingwei, Xing Xiafan, Zou Mingjun, Guo Biao, Zhao Xin, Wang Tong

Coal Geology & Exploration

The ecological management of alpine permafrost area in plateau is a global problem, with few precedents for coal resource protection while ecological management. In this paper, the following results achieved in the ecological management in Muli area of Qinghai Province were understood in accordance with the idea of systematic engineering for the purpose of ecological environmental protection, with consideration to the protection of residual coal resources. Specifically, study was conducted on the ecological vulnerability of Muli mining area to damage and the difficulty of restoration under the control of natural climatic characteristics. Meanwhile, the characteristics of soil erosion and vegetation …

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Processing Of Coal Mine Csamt Data With Wide Field Electromagnetic Method, Zhu Yunqi, Li Diquan, Liu Zuiliang, Zhang Xin Apr 2023

Processing Of Coal Mine Csamt Data With Wide Field Electromagnetic Method, Zhu Yunqi, Li Diquan, Liu Zuiliang, Zhang Xin

Coal Geology & Exploration

A CSAMT detection test was carried out for a coal mine with V8 multi-functional electrical instrument. Due to the serious electromagnetic interference within the area, the Cagniard apparent resistivity was low in quality. In order to improve the quality and utilization rate of data, authors attempted to process the CSAMT data collected by V8 with the wide field electromagnetic method, which used single-component method and ratio method (Electric field divided by magnetic field) to calculate apparent resistivity. The results showed that there was some deviation between the single-component wide field apparent resistivity and the actual terrestrial electricity because the emission …

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Experimental Study On Heat Transfer Performance Of Double U-Shaped Buried Tube Heat Exchanger, Li Lei, Zhang Weidong, Xu Shuanhai, Zhao Yongzhe, Dang Dongsheng, Wang Qilong, Gou Li, Lei Yanzi Apr 2023

Experimental Study On Heat Transfer Performance Of Double U-Shaped Buried Tube Heat Exchanger, Li Lei, Zhang Weidong, Xu Shuanhai, Zhao Yongzhe, Dang Dongsheng, Wang Qilong, Gou Li, Lei Yanzi

Coal Geology & Exploration

Double U-shaped buried tube heat exchanger (DUBTHE) are prone to pipe crossing and thermal short-circuiting in the practical applications, resulting in the reduced heat transfer performance and directly affecting the operational efficiency of shallow geothermal heat pump system. Based on the initial line thermal average temperature, thermal conductivity theory and slope method, and taking a shallow geothermal heat pump project in Xi'an as the engineering background. Then, this study investigate the effects of initial average temperature, thermal conductivity and volumetric heat capacity of rock-soil, and tube clamp spacing on the heat transfer performance of DUBTHE through field geotechnical thermal response …

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Quality Assessment Of Resistivity Monitoring Data Of Coal Mines, Cui Weixiong, Yuan Bo Apr 2023

Quality Assessment Of Resistivity Monitoring Data Of Coal Mines, Cui Weixiong, Yuan Bo

Coal Geology & Exploration

Resistivity monitoring of coal mines is an important technical means of preventing water hazards on the roof and floor of a mining face. However, it is difficult to guarantee high-quality resistivity data monitored and collected due to the complex and extremely strong electromagnetic interference in the monitoring environment, as well as the limitations of the maximum emission current for the purpose of safe coal mining. To select and utilize highly reliable data from the massive data monitored daily, this study compared and analyzed the advantages and disadvantages of commonly used methods for quality assessment of data obtained using the DC …

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Key Technology Of Automatic Loading And Unloading System For Dual-Pipe Directional Drilling Rig And Its Application In Soft–Fragmentized Coal Seam, Li Kun, Ting Ren, Yao Yafeng Apr 2023

Key Technology Of Automatic Loading And Unloading System For Dual-Pipe Directional Drilling Rig And Its Application In Soft–Fragmentized Coal Seam, Li Kun, Ting Ren, Yao Yafeng

Coal Geology & Exploration

To improve the automatic level and efficiency of loading and unloading of drilling rigs during the construction of dual-pipe directional drilling, an automatic loading and unloading device of dual pipe was developed to realize the fully automatic loading and unloading of drilling rigs under different working conditions and to solve the technical problems of loading and unloading the drill pipes and casing simultaneously during the dual-pipe directional drilling. Meanwhile, the device structure and control system was designed to restrict the load applied to the device during construction with the end-compliant technique. Besides, the key boundary conditions of the control program …

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Effects Of Mos2 On The Matrix Performance Of Hot-Pressed Fe-Based Diamond Drill Bit, Zhang Wenjiao, Tan Songcheng, Pan Bingsuo, Jin Xin, Kong Xiangqing, Long Shanglin Apr 2023

Effects Of Mos2 On The Matrix Performance Of Hot-Pressed Fe-Based Diamond Drill Bit, Zhang Wenjiao, Tan Songcheng, Pan Bingsuo, Jin Xin, Kong Xiangqing, Long Shanglin

Coal Geology & Exploration

Diamond drill bit is a common rock breaking tool in various exploration works, but the diamond in drill bit has poor thermal stability. As heat is constantly generated during the drilling process, the self-cooling of diamond drill bit under the condition of drought and water shortage is very important to improve the drilling efficiency. In order to decrease the friction coefficient between bit matrix and rock interface under dry drilling condition and reduce the thermal damage of diamond during drilling, molybdenum disulfide (MoS2) was added into the Fe-based diamond bit matrix, and research was performed for the effects …

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Study On Construction Of Microbial Solid-Free Drilling Fluid System And Its Borehole Wall Enhancement Mechanism, Li Zhijun, Zhu Mao, Zhi Jingzi, Han Yi, Chen Junxiu, Zhao Gan Apr 2023

Study On Construction Of Microbial Solid-Free Drilling Fluid System And Its Borehole Wall Enhancement Mechanism, Li Zhijun, Zhu Mao, Zhi Jingzi, Han Yi, Chen Junxiu, Zhao Gan

Coal Geology & Exploration

Broken formations are often encountered during drilling, which is prone to the instability of wellbore wall and induces serious downhole accidents. Enhancing the cementing force between the broken blocks and improving the mechanical strength of the surrounding rocks of a wellbore is one of the effective ways to solve the instability of wellbore in this type of formation, for which the microbially induced calcite precipitation (MICP) technology provides a good reference. To this end, the growth of Bacillus pasteurii in the solid-free drilling fluid system was analyzed through experimental study, and thus a solid-free drilling fluid suitable for its growth …

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The State Of Sustainability At Wcu: Key Insights From Wcu’S First Sustainability Census, Aliza Richman Apr 2023

The State Of Sustainability At Wcu: Key Insights From Wcu’S First Sustainability Census, Aliza Richman

Sustainability Research & Practice Seminar Presentations

Professor Aliza Richman, Sociology - The State of Sustainability at WCU: Key Insights from WCU’s First Sustainability Census

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221 - Angkorian Temples In Mainland Southeast Asia: Cambodia, Laos, Thailand & Vietnam 9th - 15th Century, Sophuth Phon Apr 2023

221 - Angkorian Temples In Mainland Southeast Asia: Cambodia, Laos, Thailand & Vietnam 9th - 15th Century, Sophuth Phon

GREAT Day Posters

The Angkorian Era of the Khmer Empire (9th - 15th AD) is notable for its construction of numerous temples of high architectural heritage value, yet those temples have not been studied in depth. The spatial distribution of those temples, and their various historical characteristics, are also yet to be analyzed or mapped out. The purpose of this project is to spatially map the temple and discern if locations correlate to the region’s geography. This project compiled primary data on 70 major Angkorian temples in mainland Southeast Asia using various sources but primarily Google Earth Pro and Humanitarian Data Exchange (HDX). …

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263 - Housing And Integrating Bats Into The Suny Geneseo Campus Ecosystem., Hailey Cullen, Gabrielle Joseph Apr 2023

263 - Housing And Integrating Bats Into The Suny Geneseo Campus Ecosystem., Hailey Cullen, Gabrielle Joseph

GREAT Day Posters

This presentation centers on research conducted on building a sustainable prototype design of a bat box. We focused on configuring the implementation of bat boxes around the SUNY Geneseo campus as well as the optimal materials to use in the building of this prototype. The primary species targeted in our research and design development is the big brown bat.

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339 - Snowvember 2.0: Mapping Lake-Effect Snowfall In The Buffalo, New York Area During The November 2022 Extreme Snowfall Event, Gabrielle Puente Apr 2023

339 - Snowvember 2.0: Mapping Lake-Effect Snowfall In The Buffalo, New York Area During The November 2022 Extreme Snowfall Event, Gabrielle Puente

GREAT Day Posters

The City of Buffalo, New York is located in western New York State near two Great Lakes: Lake Ontario to the north, and Lake Erie to the west. The Great Lakes region that includes Buffalo experiences a weather phenomenon known as lake-effect snow, where surface buoyant instability and upward moisture movement from the Great Lakes can cause extreme snowfall in localized bands. The purpose of this project is to analyze the total amount of snowfall that occurred on a specific lake-effect snowfall even in November 2022, termed "Snowvember 2.0" (or November 2022 Great Lakes Winter Storm.) Snowfall data was obtained …

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Food Web Structure And Dynamics Across Space And Time, Angélica González Apr 2023

Food Web Structure And Dynamics Across Space And Time, Angélica González

Sustainability Seminar Series

Human activities are fundamentally altering major biogeochemical cycles, which are at the core of the structure and functioning of Earth’s systems. Increasing inputs of chemical elements such as nitrogen (N) and phosphorus (P) and their imbalanced inputs (N:P ratios) are having severe consequences on ecological phenomena from organism physiology to ecosystem functioning. In this talk, I will discuss the utility of ecological stoichiometry thinking combined with the use of surveys, experiments, and data synthesis approaches, to understand the consequences of shifts in nutrient supply dynamics on ecological processes at multiple scales.

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Progress And Reflection Of Intelligent Geological Guarantee Technology In Coal Mining Face, Wang Guofa, Zhang Jianzhong, Xue Guohua, Liu Zaibin, Liu Qing, Li Mei, Liu Junfeng, Cheng Jian, Zhang Xueliang Apr 2023

Progress And Reflection Of Intelligent Geological Guarantee Technology In Coal Mining Face, Wang Guofa, Zhang Jianzhong, Xue Guohua, Liu Zaibin, Liu Qing, Li Mei, Liu Junfeng, Cheng Jian, Zhang Xueliang

Coal Geology & Exploration

Coal mine geological guarantee technology is the key path to achieve accurate and green coal mining. In view of the requirements of intelligent mining and geological guarantee, the main problems faced by the geological guarantee of the mining face were analyzed, mainly including the weak basic theoretical research, insufficient geological exploration accuracy, modeling accuracy unable to meet the engineering application, difficulties in model dynamic updating, and lack of optimal decision-making means for global path of intelligent mining based on spatio-temporal evolution. According to the faced difficulties and technical status, the author explored and practiced the geological guarantee technology of intelligent …

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Electromagnetic Methods In The Detection Of Water Hazards In Coal Mines: A Review, Zhang Jifeng, Sun Naiquan, Liu Zuiliang, Qi Zhipeng Apr 2023

Electromagnetic Methods In The Detection Of Water Hazards In Coal Mines: A Review, Zhang Jifeng, Sun Naiquan, Liu Zuiliang, Qi Zhipeng

Coal Geology & Exploration

Water hazards in coal mines are a major type of hidden danger in safe coal mining. The accurate detection of hidden factors to cause hazard is the prerequisite to solving the water hazards. Electromagnetic methods, which are sensitive to low-resistivity bodies and have multiple types and high adaptability, can be used to effectively detect water-rich hazard-causing factors. Traditional ground electromagnetic methods, including the controlled source audio-frequency magnetotellurics (CSAMT) method and the loop source transient electromagnetic method, play an important role in detecting hidden hazard-causing factors in coal mines. With the continuous development of new technologies, near-source electromagnetic methods have developed …

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A Review On Research Of Reflected In-Seam Wave Detection Technology In Coal Mine, Wang Ji, Ye Hongxing, Zhang Guangzhong, Li Gang, Wu Guoqing, Niu Huan, Yang Yanjun, Guan Qi Apr 2023

A Review On Research Of Reflected In-Seam Wave Detection Technology In Coal Mine, Wang Ji, Ye Hongxing, Zhang Guangzhong, Li Gang, Wu Guoqing, Niu Huan, Yang Yanjun, Guan Qi

Coal Geology & Exploration

Reflected in-seam wave can be used in one roadway to detect the abnormal geological structures such as faults in some area on both sides of the roadway or in front of tunneling. In this paper, the data and processing method of the reflected in-seam wave were compared based on the 2 different detection areas on side of the roadway and in front of tunneling. In particular, the technical principles, applicable conditions and research progress of three imaging methods of reflected in-seam wave were analyzed and sorted out, including the stack imaging, migration imaging and advance imaging of tunneling face. Besides, …

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Detection Of Change In The Coal Thickness Of A Fully Mechanized Mining Face Based On Electromagnetic Wave Penetration, Wu Rongxin, Li Xiang, Xiao Yulin Apr 2023

Detection Of Change In The Coal Thickness Of A Fully Mechanized Mining Face Based On Electromagnetic Wave Penetration, Wu Rongxin, Li Xiang, Xiao Yulin

Coal Geology & Exploration

A fully mechanized mining face tend to show great change in coal thickness, which affects the safe, efficient coal mining. Therefore, it is necessary to detect the change in the coal thickness before stoping. To determine the response of electromagnetic (EM) wave penetration to the change in the coal thickness, this study established a three-dimensional model of fully mechanized mining faces using simulation software. On this basis, this study simulated the change in the coal thickness under different ratios of the coal-to-rock resistivity based on EM wave penetration. The results are as follows: (1) With a decrease in the coal …

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Development Status And Trend Of High-Density 3d Seismic Exploration Technology For Coal Fields, Dong Shouhua, Huang Yaping, Jin Xueliang, Yang Guangming, Nie Ailan, Qi Xuemei, Cheng Yan, Wu Haibo Apr 2023

Development Status And Trend Of High-Density 3d Seismic Exploration Technology For Coal Fields, Dong Shouhua, Huang Yaping, Jin Xueliang, Yang Guangming, Nie Ailan, Qi Xuemei, Cheng Yan, Wu Haibo

Coal Geology & Exploration

Traditional 3D seismic exploration in coal mining areas is difficult to meet the requirements of transparent and accurate geological exploration for safe and efficient coal mining due to its low precision for complex structures, lower coal seams, and limestones. In this case, high-density 3D seismic exploration technology for coal fields emerged. This technology has undergone three developmental stages in China, namely the exploration and test stage during 2005‒2007, the test and demonstration stage during 2008‒2014, and the promotion and application stage since 2015. After nearly 20 years of development, its accuracy for the exploration of complex geological structures has been …

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Source And Release Law Of Fluorine In Water-Rock System Of Coal Mine Goaf In Contiguous Area Of Shaanxi And Inner Mongolia, Wang Tiantian, Jin Dewu, Xue Jiankun, Ji Hongying, Shang Hongbo, Zhou Zhenfang, Yang Jian, Cao Yu Apr 2023

Source And Release Law Of Fluorine In Water-Rock System Of Coal Mine Goaf In Contiguous Area Of Shaanxi And Inner Mongolia, Wang Tiantian, Jin Dewu, Xue Jiankun, Ji Hongying, Shang Hongbo, Zhou Zhenfang, Yang Jian, Cao Yu

Coal Geology & Exploration

The coal mine goaf is the key area for the formation of high-fluoride mine water, and the source and release of fluorine in goaf water-rock system determines the enrichment or depletion of fluorine in mine water. Aiming at the unclear source and release rule of fluorine in the mine water of 3-1 coal goaf in the contiguous area of Shaaxi and Inner Mongolia, hydrochemical test, mineral composition analysis, mineral scanning electron microscopy and energy spectrum detection, as well as laboratory water-rock simulation experiment, were conducted to determine the source and occurrence carrier of fluorine in coal mine water, and to …

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A Preliminary Study On The Multiscale Effect Of Seismic Anisotropy Of Coal Seams At Long Wavelengths, Wang Yun, Zheng Yongqin, Yang Chun, Zhang Yi, Li Yingda, Zhang Huimin Apr 2023

A Preliminary Study On The Multiscale Effect Of Seismic Anisotropy Of Coal Seams At Long Wavelengths, Wang Yun, Zheng Yongqin, Yang Chun, Zhang Yi, Li Yingda, Zhang Huimin

Coal Geology & Exploration

Terrestrial coal-bearing strata in China are all typical thin interbeds given the seismic frequency bands of coal exploration. The isotropic thin interbeds are superimposed in the coal-bearing strata, exhibiting seismic anisotropy at long wavelengths among different seismic wavelengths, for which simplified equivalent processing, such as vertical transverse isotropy (VTI) or isotropy (ISO) approximation, is generally adopted in seismic exploration. However, the long-wave approximation has different applicable conditions for strata with different elastic properties. Taking the coal-bearing strata in the Huainan Coalfield as an example, this study established two-dimensional models of horizontal thin interbeds using acoustic and density logging curves of …

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Preparation And Characteristics Of Inorganic Curing Foam With Large-Volume Fly Ash In Goaf, Ma Li, Du Su, Zhang Zhaoyun, Wang Hui, Zhao Liang, Zhang Bo Apr 2023

Preparation And Characteristics Of Inorganic Curing Foam With Large-Volume Fly Ash In Goaf, Ma Li, Du Su, Zhang Zhaoyun, Wang Hui, Zhao Liang, Zhang Bo

Coal Geology & Exploration

Air leakage in the goaf of coal mine is an important cause of coal fire disaster. The traditional filling and plugging materials are easy to crack, with poor fluidity and high cost. Therefore, it is necessary to develop new materials for effective filling and plugging of the air leakage channels. Herein, the new filling and plugging material of inorganic curing foam with large-volume fly ash was developed by optimizing the mix ratio based on material fluidity, initial setting time and compressive strength using the single factor variable method. Meanwhile, the material hydration process was characterized by the infrared spectroscopy, X-ray …

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Technological Path And Geological Guarantee For Energy Storage In Underground Space Formed By Coal Mining, Sun Qiang, Zhang Weiqiang, Geng Jishi, Hu Jianjun, Zhang Yuliang, Lyu Chao, Ge Zhenlong, Li Pengfei, Jia Hailiang, Liu Yabin, Li Yuxiang Apr 2023

Technological Path And Geological Guarantee For Energy Storage In Underground Space Formed By Coal Mining, Sun Qiang, Zhang Weiqiang, Geng Jishi, Hu Jianjun, Zhang Yuliang, Lyu Chao, Ge Zhenlong, Li Pengfei, Jia Hailiang, Liu Yabin, Li Yuxiang

Coal Geology & Exploration

Coal resource is still in the main position of China’s energy structure, but the development of coal industry is facing the new challenge of “carbon peaking and carbon neutrality”. Actively developing coal underground space energy storage technology is an effective means to promote low-carbon and clean energy utilization, and also a key measure to ensure China’s energy strategic security. This study discussed the potential utilization of underground space formed by coal mining based on the current energy storage technologies. Focusing on new energy storage technologies such as underground pumped storage hydropower plants in coal mines (UPSHCM), thermal energy storage (TES), …

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Experimen On Mechanical Properties Of Various Graded Collapse Column Fills, Liu Weitao, Du Yanhui, Pang Lifu, Meng Xiangxi, Shen Jianjun, Hu Yingying Apr 2023

Experimen On Mechanical Properties Of Various Graded Collapse Column Fills, Liu Weitao, Du Yanhui, Pang Lifu, Meng Xiangxi, Shen Jianjun, Hu Yingying

Coal Geology & Exploration

In order to study the mechanical properties of collapse column fill under different consolidation pressures and grain compositions. Base on similar simulated rock-soil mass sample under different states of geotechinal consolidation test preparing, we investigated the mechanical characteristics and microstructure evolution mechanism of collapse column filling by conducting the triaxial loading test, mercury intrusion porosimetry and scanning electron microscopy in different states of rock-soil mass. The results show that the rock-soil mass has obvious shaping characteristics and the stress-strain curve can be divided into four stages: pore compaction stage, stable deformation stage, deformation failure stage and creep-like stage. The compressive …

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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 Apr 2023

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 …

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