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Articles 1981 - 2010 of 4587
Full-Text Articles in Mining Engineering
Dewatering Ash – Progress Over The Last 5 Years, Greg M. Landry, Paul C. Schmall
Dewatering Ash – Progress Over The Last 5 Years, Greg M. Landry, Paul C. Schmall
World of Coal Ash Proceedings
No abstract provided.
Towards Development Of Sustainable Asphalt Pavement Using Off-Spec Fly Ash, Ahmed Faheem, Ahmed Abdalla, Konstantin Sobolev
Towards Development Of Sustainable Asphalt Pavement Using Off-Spec Fly Ash, Ahmed Faheem, Ahmed Abdalla, Konstantin Sobolev
World of Coal Ash Proceedings
No abstract provided.
Ccr Corrective Measures Assessment & Implementation – A Technical Roadmap And Smart Communication/Management Strategies, Steven F. Putrich, David Hagen
Ccr Corrective Measures Assessment & Implementation – A Technical Roadmap And Smart Communication/Management Strategies, Steven F. Putrich, David Hagen
World of Coal Ash Proceedings
No abstract provided.
Upgrading The Properties Of Fly-Ash From Long-Term Storage, With Simultaneous Deagglomeration, Drying & Classification Using Atritor Technology, Andrew Rigg, Scott Coley, Paul Machacek
Upgrading The Properties Of Fly-Ash From Long-Term Storage, With Simultaneous Deagglomeration, Drying & Classification Using Atritor Technology, Andrew Rigg, Scott Coley, Paul Machacek
World of Coal Ash Proceedings
No abstract provided.
Lime Activated Coal Ash For Ccr Pond Closure Projects, Larry Gibson, Karen Slade
Lime Activated Coal Ash For Ccr Pond Closure Projects, Larry Gibson, Karen Slade
World of Coal Ash Proceedings
No abstract provided.
A Thermodynamic-Guided Approach To Recycle Off-Spec Fly Ash Into Lightweight Aggregate, Mohammad Balapour, Newell Moser, Edward J. Garboczi, Grace Hsuan
A Thermodynamic-Guided Approach To Recycle Off-Spec Fly Ash Into Lightweight Aggregate, Mohammad Balapour, Newell Moser, Edward J. Garboczi, Grace Hsuan
World of Coal Ash Proceedings
No abstract provided.
Beneficial Use Of Fly Ash As A Sustainable Building Material, Randall Stremmel, Thomas Weyand
Beneficial Use Of Fly Ash As A Sustainable Building Material, Randall Stremmel, Thomas Weyand
World of Coal Ash Proceedings
No abstract provided.
In-Situ Stabilization For Hydraulic Control At Ccr Sites, Paul R. Lear
In-Situ Stabilization For Hydraulic Control At Ccr Sites, Paul R. Lear
World of Coal Ash Proceedings
No abstract provided.
Study To Evaluate Future Ash Beneficial Use, Corina Maria Aldea, Gil M. Haines, Matt Bishop
Study To Evaluate Future Ash Beneficial Use, Corina Maria Aldea, Gil M. Haines, Matt Bishop
World of Coal Ash Proceedings
No abstract provided.
Coal Quality & Combustion Impacts On Ash Chemistry, Rod Hatt
Coal Quality & Combustion Impacts On Ash Chemistry, Rod Hatt
World of Coal Ash Proceedings
No abstract provided.
Real Time Pore Pressure Monitoring Of Ash And Construction-Induced Responses: The State Of The Practice, Paul C. Schmall, Chris Hardin, Kenneth Campbell, Ryan Smith
Real Time Pore Pressure Monitoring Of Ash And Construction-Induced Responses: The State Of The Practice, Paul C. Schmall, Chris Hardin, Kenneth Campbell, Ryan Smith
World of Coal Ash Proceedings
No abstract provided.
Field And Laboratory Methods To Demonstrate Monitored Natural Attenuation For Coal Combustion Product Constituents In Groundwater, Jim Redwine, Masa Kanematsu, Kristi Mitchell, Dimitri Vlassopoulos
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, Melissa Hedgecoth, Lisa Jn Bradley, Rock Vitale, Neil Carriker
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.
Developing Single Use Deposits Of Coal Derived Fly Ash As A National Resource, Nigel Cooke
Developing Single Use Deposits Of Coal Derived Fly Ash As A National Resource, Nigel Cooke
World of Coal Ash Proceedings
No abstract provided.
Six Years Of Service, Supply, And Success: Processing Harvested Ccr From Impoundments, William Fedorka, P.E.
Six Years Of Service, Supply, And Success: Processing Harvested Ccr From Impoundments, William Fedorka, P.E.
World of Coal Ash Proceedings
No abstract provided.
Relating Detonation Parameters To The Detonation Synthesis Of Silicon Carbide, Martin Langenderfer, Eric W. Bohannan, Jeremy Lee Watts, William Fahrenholtz, Catherine E. Johnson
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 …
A New Rock Hardness Classification System Based On Portable Dynamic Testing, Sasan Ghorbani, Seyed Hadi Hoseinie, Ebrahim Ghasemi, Taghi Sherizadeh, Christina Wanhainen
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. …
Exploring The Deformation Mechanics Of Coal Ribs Using The Distinct Element Modeling Approach, Maurice Sunkpal, Taghi Sherizadeh
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 …
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
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 …
Present Situation And Prospects Of Tourism Resource Evaluation In Abandoned Mining Areas, Wang Qiuju, Wang Yue, Ma Yuying, Zhang Bo
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 …
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
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 …
Establishment Of A 3d Solid Model Blasting Rock Mass Based On Intelligent Lithology Identification, Chen Yingxian, Wang Pengfei
Establishment Of A 3d Solid Model Blasting Rock Mass Based On Intelligent Lithology Identification, Chen Yingxian, Wang Pengfei
Coal Geology & Exploration
With the development and application of intelligent drilling machine, the lithology data of blasting borehole can be obtained accurately. The blast-hole database is established to store and manage the intelligently identified blast-hole data. Taking the rock property data of blast hole as the sample, the inverse distance square method is used to interpolate the solid elements within the blasting area to generate the 3D solid model of blasting rock mass. The 3D solid model of rock mass was cut by using the polygon of blasting area and the triangular network of bench, and then the 3D solid model of blasting …
Establishment And Application Of Four Basic Data Accounts For Coal Mine Water Control, Lyu Yuguang, Li Mingzhen, Hu Falun, Liu Shuang
Establishment And Application Of Four Basic Data Accounts For Coal Mine Water Control, Lyu Yuguang, Li Mingzhen, Hu Falun, Liu Shuang
Coal Geology & Exploration
Mine water inflow, aquifer water level, analysis data of water quality and formation information are closely related to water prevention and control. It takes a long time to collect a large amount of data. The relevant technical specifications clearly require the establishment of an account for data management, but there is no unified and practical account format, and detailed description of its purpose. Microsoft Excel is used to establish four basic data accounts of mine water inflow, aquifer water level, hydrochemistry and information on stratum. The format of the account is standardized, and the methods for data application of each …
Formation Of Permafrost And Its Influence On Natural Gas Hydrate Accumulation In Muli Region, Qinghai Province, Wang Liping, Zhu Yinghao, Li Ning, Xu Shuanhai, Tian Yanzhe, Liu Naifei, Wang Wenli
Formation Of Permafrost And Its Influence On Natural Gas Hydrate Accumulation In Muli Region, Qinghai Province, Wang Liping, Zhu Yinghao, Li Ning, Xu Shuanhai, Tian Yanzhe, Liu Naifei, Wang Wenli
Coal Geology & Exploration
The characteristics of the existing permafrost and natural gas hydrates were summarized and analyzed by studying the natural gas hydrate formation in Muli Region, Qinghai Province. On the basis of the evidence of the Quaternary climate survey and the available geological exploration data on the Qinghai-Tibet Plateau, FLAC3D was used to simulate and calculate the formation of permafrost. The calculation results show that the existing permafrost probably formed during the late Holocene Neoglacial(4 000-3 000 to 1 000 a BP), and a stable boundary at bottom of the permafrost layer formed after about 170 a of cooling at a …
Green Transformation Paths Of Closed Coalmine Industrtry In Coal Resources Cities, Zhang Lifeng, Wang Qiuju
Green Transformation Paths Of Closed Coalmine Industrtry In Coal Resources Cities, Zhang Lifeng, Wang Qiuju
Coal Geology & Exploration
With the implementation of China's energy supply-side structural reform and coal production capacity policy, the number of coal mines closed in China is increasing year by year, and how to transform the industry after the closure of coal mines has become an urgent problem. Most of the closed coal mines are concentrated in coal resource-based cities, and the development of closed coal mines is inseparable from the development of coal resource-based cities. The selection of their advantageous industries should be consistent with the direction of industrial transformation of the cities where they are located, so as to to make effective …
Construction And Application Of Gas Resource Estimation And Evaluation Method In Abandoned Coal Mines, Liu Xiaolei, Yan Jiangwei, Liu Cao, Jia Tianrang, Feng Zhendong, Wei Jianping, Wei Guoying
Construction And Application Of Gas Resource Estimation And Evaluation Method In Abandoned Coal Mines, Liu Xiaolei, Yan Jiangwei, Liu Cao, Jia Tianrang, Feng Zhendong, Wei Jianping, Wei Guoying
Coal Geology & Exploration
On the basis of on the exploration and development status of gas resources in abandoned coal mines in China, the idea of “resource estimation + preliminary evaluation” was put forward to reasonably evaluate the gas resources in abandoned coal mines. The estimation and evaluation method of gas resources in abandoned coal mines was established, which has the advantages of less required parameters and strong practicability. According to the gas emission characteristics and abandoned time, the types of abandoned coal mines were divided into two categories: stable and unstable. Unstable coal mines were further divided into early, middle and late stages …
Mineral Composition Characteristics And Petroleum Geological Significance Of Tight Sandstone Of Longtan Formation In Weixin Area, Eastern Yunnan, Xing Huitong, Zhang Xiaoli, He Jinxian, Cao Wenjie, Yang Tiantian, Wang Jian, Shi Shuai
Mineral Composition Characteristics And Petroleum Geological Significance Of Tight Sandstone Of Longtan Formation In Weixin Area, Eastern Yunnan, Xing Huitong, Zhang Xiaoli, He Jinxian, Cao Wenjie, Yang Tiantian, Wang Jian, Shi Shuai
Coal Geology & Exploration
Tight gas is an unconventional resource developed in low-porosity and ultra-low permeability sandstone and has rich potential oil and gas reserves. However, due to its tight and low permeability, fracturing is a necessary means for efficient development of tight gas. The reservoir characteristics and material composition of sandstone are of great significance to the preliminary evaluation of resource potential and production capacity of the dense sandstone reservoirs. By using X-ray diffraction, microscopy, scanning electron microscopy and other technical means, ten outcroppings of tight sandstone from coal measures of Permian Longtan Formation in Weixin area of eastern Yunnan Province were qualitatively …
Characteristics Of Coal And Gas Outburst And Controlling Mechanism Of Stress Field In The Hanging Wall Of Normal Faults, Cao Yunxing, Zhang Haiyang, Zhang Zhen, Liu Gaofeng
Characteristics Of Coal And Gas Outburst And Controlling Mechanism Of Stress Field In The Hanging Wall Of Normal Faults, Cao Yunxing, Zhang Haiyang, Zhang Zhen, Liu Gaofeng
Coal Geology & Exploration
The fault zone is the main geological unit where coal and gas outbursts occur. Statistics of many coal and gas outbursts show that the number and intensity of the outbursts in the hanging wall are significantly greater than those in the foot wall for normal faults. However, there are few studies on the geological mechanism of this phenomenon, especially the variation of the in-situ stress field in the hanging wall of normal faults before and after mining, and its controlling mechanism of coal and gas outbursts that has not been completely demonstrated. In view of this, the normal fault DF …
Propagation Characteristics Of Flame Wave And Shock Wave During The Gas Explosion In Complex Pipeline Network, Jia Jinzhang, Wang Dongming, Niu Xin, Li Bin, Zhu Jinchao, Wang Fengxiao
Propagation Characteristics Of Flame Wave And Shock Wave During The Gas Explosion In Complex Pipeline Network, Jia Jinzhang, Wang Dongming, Niu Xin, Li Bin, Zhu Jinchao, Wang Fengxiao
Coal Geology & Exploration
For the purpose of further exploring the flame wave propagation characteristics of the gas explosion shock wave, the gas explosion experiment was carried out in a complex pipe network designed and built by ourselves. In the experiment, a high precision pressure sensor and a temperature sensor were used to collect pressure changes and temperature peak data. By using the flame sensor to collect the flame wave signal in the process of explosion, the flame wave propagation velocity was calculated according to the theoretical formula, and the Origin software was used to comprehensively process the experimental data to study the shock …
Construction And Application Of “Coal-Water-Environment” Coordinated Development Evaluation Index System：A Case Study Of Sihe Minefield, Wang Qingwei, Guo Biao, Song Mei, Yan Qiang
Construction And Application Of “Coal-Water-Environment” Coordinated Development Evaluation Index System：A Case Study Of Sihe Minefield, Wang Qingwei, Guo Biao, Song Mei, Yan Qiang
Coal Geology & Exploration
The scientific construction of the relationship among coal, water, and the environment is the basis of green coal development during the process of coal mining. This paper focus on the coal mining and protection of water resources and the ecological environment, and builds a green coordinated development evaluation index system by taking coal, water and environment into consideration. In this study, the methodology used is holistic and hierarchical principles of system theory. The selection of indicators considering resource factors, technological development and environmental concept progress are determined in accordance with the latest industry regulations, technical standards and local guiding planning. …