Review of underground coal gasification …
This paper reviews key concepts and technologies of underground coal gasification, providing insights into this developing coal conversion method. It is thought that the world coal reserve is close to …
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Monitoring and Control in Underground Coal …
Keywords: underground coal gasification; monitoring and control; Internet of Things; deep learning 1. Introduction Coal is one of the most important fossil fuels in the world, playing a vital role in human production, especially in industrial heating, urban gas production, power generation, and other fields.
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Methane from underground coal mines upends rural West …
'Met coal,' a bright spot for a fading industry. As coal production in the United States dropped by almost 50 percent over the last decade, with utilities switching to natural gas and to renewable energy alternatives like wind and solar energy, met coal has been a bright spot for mining. With its value to the global steel industry, it can ...
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A study of leakage rates through mine seals in underground coal …
At a western US underground coal mine, seal leakage rates ranged from about 0 to 0.036 m3/s for seven 340 kPa seals, which varied in essentially a linear manner with variations in head pressure at the mine seals. The National Institute for Occupational Safety and Health conducted a study on leakage rates through underground coal mine …
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(PDF) Current status and technology development in
The study, therefore, leads to discussing the modern stage of underground coal gasification and carbon capture storage development, recent pilot operations, and current developments of the growing ...
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Combustion mechanism and control approaches of …
Abstract. With the large-scale mining of coal resources, the huge economic losses and environmental problems caused by underground coal fires have become …
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Coal Mine Methane Recovery at Active and Abandoned …
Methane Recovery at U. S. Coal Mines: Profiles of Selected Gassy Underground Coal Mines 2002 -2016", which profiles the 35 gassiest U.S. mines. Please note that the tables below include additional mines not among the 35 gassiest U.S. mines, but that still have gas drainage operations. Underground Coal Mines (U) Alabama Mine Name 1Company VAM
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Read "Monitoring and Sampling Approaches to Assess Underground Coal …
In September 2011, the National Institute for Occupational Safety and Health (NIOSH) Office of Mine Safety and Health Research tested 393 rock dust samples gathered from underground coal mines and found that 47 percent did not permit the requisite amount of particles to pass through a 200 mesh sieve. 1 Overall, 51 percent of the 278 …
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Underground Coal Gasification: A Brief Review of …
Similarly to gasification in industrial reactors, underground coal gasification (UCG) produces syngas, which can be used for power generation or for the production of …
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Updated greenhouse gas inventory estimates for Indian underground coal
Underground coal mining has been known as a significant source of fugitive greenhouse gas emissions. Past analyses of these emissions in India used deterministic emission factors and predominantly focused on methane emissions with reporting of CO 2 emissions remaining limited to a few sites. This study addresses these gaps via field …
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Monitoring and Control in Underground Coal Gasification: …
By igniting in the coal seam and injecting gas agent, underground coal gasification (UCG) causes coal to undergo thermochemical reactions in situ and, thus, to be gasified into syngas for power generation, hydrogen production, and storage. Compared with traditional mining technology, UCG has the potential sustainable advantages in …
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Annual Coal Report 2022
Coal production in the Western region in 2022 increased 1.9% to 334.8 MMst. Production in Wyoming, the largest coal-producing state in the region, increased by 2.5% to 244.7 MMst. Other large producing states in the basin include North Dakota, where production increased by 0.8% to 26.7 MMst; Colorado, where production
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Underground Coal Mining
Underground mining involves opening one or more portals or shafts into the earth that follow or intercept coal seams that are too deep for surface mining methods. Two main methods of underground mining are practiced in Pennsylvania: Room-and-Pillar: Generally used for seams that are relatively flat or gently dipping.
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Underground Coal Mining Methods and Their …
In underground coal mining, the working environment is completely enclosed by the geologic medium, which consists of the coal seam and overlying and underlying strata. Depillaring is one of the most …
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Recent developments and current position of underground coal
Abstract. Underground coal gasification is a conversion and extraction process, for the production of useful synthetic product gas from an in-situ coal seam, to use in power generation, heat production or as a chemical feedstock. While many variants of the underground coal gasification process have been considered and over 75 trials …
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The Underground Coal Gasification Process in Laboratory …
The underground coal gasification (UCG) process represents a modern and effective coal mining technology that enables coal energy extraction through thermic decomposition. The coal is transformed into syngas by oxidizers (e.g., air, technical oxygen, or water steam) and is injected into a georeactor. The produced syngas is exhausted on …
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Mitigation and adaptation strategies for global change via …
This special edition of Mitigation and Adaptation Strategies for Global Change explores the opportunities and challenges of underground coal gasification (UCG). Coal is the most abundant and widespread fossil energy source in the world. Global coal reserves (British Petroleum 2015) are around 18.1 zetta joules (ZJ), while crude oil reserves are …
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An Overview of Soil Pollution and Remediation Strategies in Coal …
Coal remains a very important source of energy for the global economy. Surface and underground coal mining are the two major methods of coal extraction, and both have benefits and drawbacks. Surface coal mining can have a variety of environmental impacts including ecosystem losses, landscape alteration, soil destruction, and changes …
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Underground Coal Mining Methods and Engineering …
The two major underground methods are referred to as the room-and-pillar method and the longwall method. In both methods, the coal seam is developed by driving …
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New Dust Control Techniques Improve Working Conditions
New equipment and ideas will help miners avoid long-term exposure to coal dust By Steve Fiscor. Editor-in-Chief Several presentations given during the U.S. Coal Show, which was held recently in Pittsburgh, Pennsylvania, USA, discussed advancements in dust control. Respirable dust is the nemesis of the underground coal miner and the …
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Calcium-Bearing Minerals Transformation during Underground Coal …
Calcium-bearing minerals are one of the main typical minerals in coal and coal ash. In the process of coal thermal conversion, calcium-bearing minerals undergo different morphological transformation in which the reaction temperature, pressure, and atmosphere are important factors affecting their transformation. The reaction process of …
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GHGRP Underground Coal Mines | US EPA
Last updated on October 5, 2023. Overview and data highlights of 2022 underground coal mines sector emissions of greenhouse gases in EPA's Greenhouse …
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Research progress and visualization of underground …
Published: 26 May 2023. Research progress and visualization of underground coal fire detection methods. Tao Wang, Haiyan Wang, Xiyang Fang, Gongda Wang, Yuqi Chen, …
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A Study of Respirable Silica in Underground Coal Mines: …
An ongoing resurgence of occupational lung disease among coal miners in the United States has been linked to respirable crystalline silica (RCS). To better protect miners, a deeper understanding of key exposure factors is needed. As part of a larger investigation of RCS in 15 coal mines, this paper describes analysis of silica mass …
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Thermal-hydro-chemical-mechanical alteration of coal pores …
Underground coal gasification (UCG) is a technology to chemically convert coal resources in-situ to get combustible gas, viz. synthetic gas, comprising mainly CO 2, CO, H 2 and CH 4. This technology involves an injection of oxidant, enriched air and/or steam, into ignited coal seam and extracting the product gas from a producer. UCG can …
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Deputy of underground coal mines | Resources …
Deputy of underground coal mines . Coal mining practise & legislation . Wednesday 19 May 2021 . 10:00 am to 12:30 pm (150 mins) INSTRUCTIONS TO CANDIDATES . All questions are to be attempted . All questions are of equal value, but parts of questions may vary in value. All answers are to be written in this booklet ONLY
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Study on the monitoring method of cavity growth in underground coal …
DOI: 10.1016/j.energy.2022.126048 Corpus ID: 253474790; Study on the monitoring method of cavity growth in underground coal gasification under laboratory conditions @article{Su2022StudyOT, title={Study on the monitoring method of cavity growth in underground coal gasification under laboratory conditions}, author={Fa-qiang Su and …
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Prevention and Control of Hydrogen Sulphide Accidents in
Hydrogen sulphide is a toxic gas often present in coal seams and seriously threatens the lives and health of underground workers in coal mines. In this study, we theoretically modelled hydrogen sulphide generation in extremely thick underground coal mines with the +575 level #45 coal seam of Wudong Coal Mine as an example and …
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Monitoring the gasification area and its behavior in underground coal …
Coal heating experiment. The coal heating experiment was carried out by using a coal block which is size of 200 mm × 200 mm × 100 mm. Table 1 shows the industrial and elemental analysis values ...
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Barriers to the Commercialization and Adoption of New …
2019, 38% of which (267 million short tons) was produced in underground coal mines by 32,000 workers in 15 states. Underground coal mining is a highly specialized industry. The combination of the harsh environment, heavy equipment, physical hazards, and toxic and flammable atmospheres creates a challenging operating environment and hazardous ...
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