In-Situ Stabilization For Hydraulic Control At Ccr Sites,
2022
Forgen
In-Situ Stabilization For Hydraulic Control At Ccr Sites, Paul R. Lear
World of Coal Ash Proceedings
No abstract provided.
Coal Quality & Combustion Impacts On Ash Chemistry,
2022
Coal Combustion, Inc.
Coal Quality & Combustion Impacts On Ash Chemistry, Rod Hatt
World of Coal Ash Proceedings
No abstract provided.
Study To Evaluate Future Ash Beneficial Use,
2022
Wood Environment & Infrastructure Solutions, Inc.
Study To Evaluate Future Ash Beneficial Use, Corina Maria Aldea, Gil M. Haines, Matt Bishop
World of Coal Ash Proceedings
No abstract provided.
Field And Laboratory Methods To Demonstrate Monitored Natural Attenuation For Coal Combustion Product Constituents In Groundwater,
2022
Anchor QEA, LLC
Field And Laboratory Methods To Demonstrate Monitored Natural Attenuation For Coal Combustion Product Constituents In Groundwater, Jim Redwine, Masa Kanematsu, Kristi Mitchell, Dimitri Vlassopoulos
World of Coal Ash Proceedings
No abstract provided.
Addressing Public Fear With Facts—Tva Coal Ash Fact Sheets,
2022
Tennessee Valley Authority
Addressing Public Fear With Facts—Tva Coal Ash Fact Sheets, Melissa Hedgecoth, Lisa Jn Bradley, Rock Vitale, Neil Carriker
World of Coal Ash Proceedings
No abstract provided.
Six Years Of Service, Supply, And Success: Processing Harvested Ccr From Impoundments,
2022
The SEFA Group
Six Years Of Service, Supply, And Success: Processing Harvested Ccr From Impoundments, William Fedorka, P.E.
World of Coal Ash Proceedings
No abstract provided.
Developing Single Use Deposits Of Coal Derived Fly Ash As A National Resource,
2022
UK Quality Ash Association
Developing Single Use Deposits Of Coal Derived Fly Ash As A National Resource, Nigel Cooke
World of Coal Ash Proceedings
No abstract provided.
Relating Detonation Parameters To The Detonation Synthesis Of Silicon Carbide,
2022
Missouri University of Science and Technology
Relating Detonation Parameters To The Detonation Synthesis Of Silicon Carbide, Martin Langenderfer, Eric W. Bohannan, Jeremy Lee Watts, William Fahrenholtz, Catherine E. Johnson
Chemistry Faculty Research & Creative Works
Detonation synthesis of silicon carbide (SiC) nanoparticles from carbon liberated by negatively oxygen balanced explosives was evaluated in a 23 factorial design to determine the effects of three categorical experimental factors: (1) cyclotrimethylene-trinitramine (RDX)/2,4,6-trinitrotoluene (TNT) ratio, (2) silicon (Si) additive concentration, and (3) Si particle size. These factors were evaluated at low and high levels as they relate to the detonation performance of the explosive and the solid Si-containing phases produced. Detonation velocity and Chapman-Jouguet (C-J) detonation pressure, which were measured using rate stick plate dent tests, were evaluated. Solid detonation product mass, silicon carbide product concentration, and residual silicon …
Exploring The Deformation Mechanics Of Coal Ribs Using The Distinct Element Modeling Approach,
2022
Missouri University of Science and Technology
Exploring The Deformation Mechanics Of Coal Ribs Using The Distinct Element Modeling Approach, Maurice Sunkpal, Taghi Sherizadeh
Mining Engineering Faculty Research & Creative Works
Understanding coal rib geomechanics is essential for improving rib stability and eliminating fatality and injury trends due to rib failures. There are presently no standardized rib control practices available in most countries. In light of this observed dearth, this investigation aims to improve understanding of rib failure mechanisms using the distinct element modeling (DEM) technique. DEM is chosen because of its superior advantage to explicitly represent discontinuities and their constitutive behaviors, besides that of the intact rock matrix. To analyze the rib stability, a numerical monitoring protocol is implemented to monitor the deformation characteristics of the coal rock mass as …
A New Rock Hardness Classification System Based On Portable Dynamic Testing,
2022
Missouri University of Science and Technology
A New Rock Hardness Classification System Based On Portable Dynamic Testing, Sasan Ghorbani, Seyed Hadi Hoseinie, Ebrahim Ghasemi, Taghi Sherizadeh, Christina Wanhainen
Mining Engineering Faculty Research & Creative Works
Hardness is one of the critical physical characteristics of minerals and rocks, which indicates the resistance of the rock to penetration, scratch, or permanent deformation. As a basic concept, rock hardness has a significant role in rock mechanics and geological engineering and is an appropriate diagnostic tool for the classification of minerals and rocks. The main purpose of this study is to guide rock engineers to measure the rock hardness faster, easier, and more accurately using Leeb's dynamic hardness test. Accordingly, this paper presents a new rock hardness classification system based on the Leeb dynamic and portable hardness testing method. …
Final Inversion Of The Midcontinent Rift During The Rigolet Phase Of The Grenvillian Orogeny,
2022
University of California, Berkeley
Final Inversion Of The Midcontinent Rift During The Rigolet Phase Of The Grenvillian Orogeny, Eben B. Hodgin, Nicholas L. Swanson-Hysell, James M. Degraff, Andrew R.C. Kylander-Clark, Mark D. Schmitz, Andrew C. Turner, Yiming Zhang, Daniel A. Stolper
Michigan Tech Publications, Part 1
Despite being a prominent continental-scale feature, the late Mesoproterozoic North American Midcontinent Rift did not result in the break-up of Laurentia, and subsequently underwent structural inversion. The timing of inversion is critical for constraining far-field effects of orogenesis and processes associated with the rift’s failure. The Keweenaw fault in northern Michigan (USA) is a major thrust structure associated with rift inversion; it places ca. 1093 Ma rift volcanic rocks atop the post-rift Jacobsville Formation, which is folded in its footwall. Previous detrital zircon (DZ) U-Pb geochronology conducted by laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) assigned a ca. 950 Ma maximum …
Table Of Contents,
2022
China Coal Technology and Engineering Group (CCTEG)
Present Situation And Prospects Of Tourism Resource Evaluation In Abandoned Mining Areas,
2022
Tourism College of Beijing Union University, Beijing 100101, China
Present Situation And Prospects Of Tourism Resource Evaluation In Abandoned Mining Areas, Wang Qiuju, Wang Yue, Ma Yuying, Zhang Bo
Coal Geology & Exploration
The identification and evaluation of tourism resources are important basis for tourism planning and development in abandoned mining areas. This paper adopts literature review method and inductive analysis method to comprehensively sort out the domestic and foreign research results on the value evaluation of tourism resources in abandoned mining areas, and systematically analyze the identification, evaluation system construction and evaluation methods of tourism resources in abandoned mining areas. It is found that the current understanding of tourism resources in abandoned mining areas is only at the level of mining relics and mining heritage, lacking emphasis on the natural resources such …
Research On Redevelopment Model Of Abandoned Mining Land From The Perspective Of Property Right Policy,
2022
College of Architecture and Design, China University of Mining & Technology, Xuzhou 221116, China
Research On Redevelopment Model Of Abandoned Mining Land From The Perspective Of Property Right Policy, Deng Yuanyuan, Chang Jiang, Feng Shanshan, Zhou Xue
Coal Geology & Exploration
The reuse of abandoned mines has become the main path for resource-based cities to realize functional transformation. The redevelopment of mining land belongs to the renewal of urban stock industrial land, which is a spatial transformation process accompanied by property right transfer. The research on the evolution of the relationship between relevant property rights policies and abandoned mine redevelopment model is helpful to understand the impact of the policy and put forward suggestions for future policies. This paper combs the national and local property rights policies since 1990, takes the redevelopment practice in different times of this period as an …
Refined 3d Modeling Of Rock And Mine Specimens In Xishan Coalfield And Its Virtual Simulation Platform Construction,
2022
College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Refined 3d Modeling Of Rock And Mine Specimens In Xishan Coalfield And Its Virtual Simulation Platform Construction, Zhang Qiongyue, Chen Liming, Zhao Jingui, Wang Jianmin
Coal Geology & Exploration
Rock and mineral specimens are unique and non-renewable. The traditional collection display is not convenient for professional academic exchanges, which limits the efficient development of the popularization of geosciences. 350 representative rock and mineral specimens of Xishan Coalfield in Taiyuan City are collected to explore the fine 3D modeling of small-scale rock and mineral specimens and to construct a virtual simulation platform. First, the multi-view image 3D reconstruction technology to design a matching three-dimensional ring object photography device is used to collect image data. Then modeling accuracy is optimized from two aspects of original image quality and modeling software. Finally, …
Geochemical Characteristics Of Rare Earth Elements In Surface Sediments From Huainan Coal Mining Subsidence Area, Anhui Province, China,
2022
College of Resources and Environmental Engineering, Anhui Province Engineering Laboratory for Mine Ecological Restoration, Anhui University, Hefei 230601, China
Geochemical Characteristics Of Rare Earth Elements In Surface Sediments From Huainan Coal Mining Subsidence Area, Anhui Province, China, Qian Yinghua, Zheng Liugen, Chen Yuanping, Jiang Chunlu, Chen Xing, Chen Yongchun
Coal Geology & Exploration
Rare earth elements(REEs) are widely used in environmental geochemical analysis process research due to their unique chemical characteristics. This study investigated the geochemical characteristics of rare earth elements in surface sediment from the Huainan coal mining subsidence area, Anhui Province, China. Twelve surface sediment samples were collected from Panyi, Guqiao and Xieqiao subsidence areas in the study area. The content of rare earth elements in the samples was tested and analyzed by ICP-MS, and the distribution characteristics and controlling factors of REEs and its material sources were discussed. The results show that the rare earth element content in the surface …
Progress In Investigation Technology For Coal Mine Goafs Under Buildings And Structures In China,
2022
China Coal Science & Technology Ecological Environment Technology Co. Ltd., Beijing 100013, China; i’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China; Institute of Geotechnical Engineering, Xi’an University of Technology, Xi’an 710048, China
Progress In Investigation Technology For Coal Mine Goafs Under Buildings And Structures In China, Liu Xiaoping
Coal Geology & Exploration
The investigation of goafs in the coal mine is a major technical problem that restricts the normal engineering construction and safe operation of the upper site. Looking back at the establishment of coal mine goaf prospecting technical specifications in China, the results obtained in the past three decades are reviewed in the goaf prospecting methods, the deformation prediction, stability evaluation, etc. Some representative problems are pointed out in the current actual investigation work, such as the poor guidance of the investigation outline, the inadequate integration of drilling technical requirements with the investigation work, the inability of engineering geophysical exploration to …
Principle Of A Self-Protective Sealing Device For Mwd And Its Influencing Factors,
2022
China Coal Research Institute, Beijing 100013, China; Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China
Principle Of A Self-Protective Sealing Device For Mwd And Its Influencing Factors, Wang Yaoming, Ye Genfei, Zhao Yongzhe, Gao Ke, Liu Weiwei, Duan Huijun
Coal Geology & Exploration
For deeper drilling depth and longer service life of MWD, a self-protection sealing device for the MWD instrument is designed given the defects of the combined static sealing structure. The relationship between rubber airbag expansion displacement and air pressure was studied through static expansion numerical simulation. On this basis, the reasons for different results due to different model sizes were analyzed, and the factors causing the different simulation results of the self-protection sealing device were discussed. The four independent variables of airbag diameter, width, wall thickness and inner cavity width were determined and simulated to explore their relationship with the …
Temporal And Spatial Changes Of Terrestrial Water Storage In Yellow River Basin Based On Grace,
2022
State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology(Beijing), Beijing 100083, China; College of Geoscience and Surveying Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China
Temporal And Spatial Changes Of Terrestrial Water Storage In Yellow River Basin Based On Grace, Yang Fei, Zhang Chengye, Li Jun, Song Ziheng, Guo Tianyu
Coal Geology & Exploration
The Yellow River Basin is currently the main gathering place both for economically recoverable coal and coal production in China. Understanding the water sources and its changes is not only a prerequisite for promoting the intensive use of water in the Yellow River Basin, but also the basis for carrying out the ecological protection and sustainable development of the mining areas in the Yellow River Basin. Compared with traditional methods for monitoring terrestrial water storage that are limited by the distribution and number of monitoring points, GRACE provides a new way to study the temporal and spatial changes of water …
The Characteristics And Dynamic Mechanism Of Regional Development And Evolution Of Pan’An Lake,
2022
College of Architecture & Design, China University of Mining and Technology, Xuzhou 221116, China
The Characteristics And Dynamic Mechanism Of Regional Development And Evolution Of Pan’An Lake, Chang Jiang, Chen Yedong, Li Zixuan, Wang Hui, Feng Shanshan
Coal Geology & Exploration
Coal mining activities will directly or indirectly affect the development and evolution of cities and their characteristics. Jiawang District of Xuzhou used to be an important coal production base in China, and Pan’an Lake region is the main area of Jiawang coal production. This paper takes Pan’an Lake region as the research object, analyzes the characteristics of its development and evolution under the influence of coal mining activities, selects social environment, economic development, policy control and resource environment as the driving factors affecting the development and evolution of the area, and uses principal component analysis to determine the main driving …
