Results 11 to 20 of about 653,647 (206)

An Improved Cr-EA-IRMS Method for the Effective Determination of the Hydrogen Isotopes in Coal Samples

open access: yesFrontiers in Chemistry, 2022
Hydrogen isotope analysis of coal is an important tool in the geochemical analysis of coal. The traditional method of hydrogen isotope analysis of coal requires the oxidation of organic matter bound hydrogen in coal to water by an oxidizing agent and ...
Hongwei Li   +3 more
doaj   +1 more source

Reasonable coal pillar size of gob-side entry driving under residual coal pillar in short distance and extra-thick coal seam

open access: yesMeikuang Anquan, 2022
Selecting reasonable coal pillar size is the premise of success and safety of gob side entry driving. Taking 30503 working face of a coal mine as the background, the reasonable size of narrow coal pillar in gob driving roadway under the condition of ...
GAO Le, ZHAO Bin, ZHOU Xiangwen, LI Zhenlei, SONG Dazhao, YAN Pengfei, TIAN Xianghui
doaj   +1 more source

A moving baseline for evaluation of advanced coal extraction systems [PDF]

open access: yes, 1981
Results from the initial effort to establish baseline economic performance comparators for a program whose intent is to define, develop, and demonstrate advanced systems suitable for coal resource extraction beyond the year 2000 are reported.
Bickerton, C. R., Westerfield, M. D.
core   +2 more sources

Design and implementation of coal mine networking data analysis model

open access: yesMeikuang Anquan, 2021
A set of coal mine networking monitoring big data analysis architecture is proposed based on the content of coal mine safety monitoring and personnel positioning networking data.
CHEN Qing
doaj   +1 more source

Dynamic modelling, validation and analysis of coal-fired subcritical power plant [PDF]

open access: yes, 2014
Coal-fired power plants are the main source of global electricity. As environmental regulations tighten, there is need to improve the design, operation and control of existing or new built coal-fired power plants.
Oko, Eni, Wang, Meihong
core   +2 more sources

Key technologies for intelligent monitoring and early warning of coal spontaneous combustion

open access: yesMeikuang Anquan, 2022
Coal spontaneous combustion disaster is one of the main disasters in the process of coal mining. The acquisition of multi-source three-dimensional parameters of spontaneous coal combustion, the in-depth analysis of data, the establishment of ...
YI Xin, HU Zhen, WANG Weifeng, DENG Jun
doaj   +1 more source

Effect of Multiphase Radiation on Coal Combustion in a Pulverized Coal jet Flame [PDF]

open access: yes, 2017
The accurate modeling of coal combustion requires detailed radiative heat transfer models for both gaseous combustion products and solid coal particles. A multiphase Monte Carlo ray tracing (MCRT) radiation solver is developed in this work to simulate a ...
Baum   +31 more
core   +2 more sources

Detailed Componential Characterization of Extractable Species with Organic Solvents from Wheat Straw

open access: yesInternational Journal of Analytical Chemistry, 2017
Componential analysis of extractives is important for better understanding the structure and utilization of biomass. In this investigation, wheat straw (WS) was extracted with petroleum ether (PE) and carbon disulfide (CS2) sequentially, to afford ...
Yong-Chao Lu   +3 more
doaj   +1 more source

Application of satellite radar interferometry (PSInSAR) in analysis of secondary surface deformations in mining areas. Case studies from Czech Republic and Poland [PDF]

open access: yes, 2018
Secondary deformations are ground movements occurring in areas of ceased underground mining. These are associated with delayed readjustment of rock mass resulting in subsidence, discontinuous deformations (sinks, cracks, etc.) due to destruction of ...
Blachowski, Jan   +4 more
core   +1 more source

Study on test of coal co-firing for 600MW ultra supercritical boiler with four walls tangential burning

open access: yesE3S Web of Conferences, 2018
On account of nine commonly used coals in a Jiangxi Power Plant,two kinds of coal were selected to be applied in coal co-firing test through industrial analysis,elementary analysis and thermogravimetric analysis of coal.During the coal co-firing test,two
Ying Wu, Yong-lu Zhong, Guo-mingi Yin
doaj   +1 more source

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