Combined Method of Coal Mining in the Opening of Shallow Layers as a Direction of Innovative Development of Geotechnology [PDF]
E3S Web of Conferences, 2021 In recent years, there has been a decline in the efficiency of coal mining by traditional methods. On the one hand, the volume of coal outside the contour of the cut, which is economically impractical for open-pit mining, is increasing. On the other hand,
Tyuleneva Tatiana +3 more
doaj +1 more source
Interpretable Repair Method for Event Logs Based on BERT and Weak Behavioral Profiles [PDF]
Jisuanji kexue, 2023 In practical business processes,low-quality event logs due to outliers and missing values are often unavoidable.Low-quality event logs can degrade the performance of associated algorithms for process mining,which in turn interferes with the correct ...
LI Binghui, FANG Huan, MEI Zhenhui
doaj +1 more source
Influence of Pore Structure Characteristics of Primary Coal on Coalbed Methane Adsorption
Advances in Materials Science and Engineering, 2022 In order to better discuss the influence of pore structure characteristics of primary coal on coalbed methane adsorption, suburban coal and Zhaozhuang coal in Henan Province were systematically sampled.
Gang Liu
doaj +1 more source
Destabilization of the hard coal microstructure by a weak electric field [PDF]
, 2018 This study aims to analyse physical and chemical changes in hard coal samples under the influence of low-intensity electric fields in comparison to the fragments of ejected coal, as well as the coal samples selected from the zones ...
Kamchatnyi, Oleksii +3 more
core +1 more source
Bioleaching Mercury from Coal with Aspergillus flavus M-3
Microorganisms, 2023 This study focuses on the utilization of Aspergillus flavus(M-3) for the bioleaching mercury from coal, offering an alternative and environmentally to its clean utilization.
Wenqing Mao +5 more
doaj +1 more source
The evaluation of a risk degree for the process of a brown coal spontaneous ignition on dumps with using of modern numeric methods [PDF]
, 2018 The article is a summary of information about evaluation of a risk degree for a brown coal spontaneous ignition which is realized on the base of a database analysis of information about the development of stative quantities and desorbated gases in the ...
Blata, Jan +4 more
core +1 more source
Molecules, 2019 The physicochemical properties of four 1-alkyl-3-methylimidazolium bromide ([CnC1im]Br, n = 5, 6, 7, 8) ionic liquids (ILs) were investigated in this work by using inverse gas chromatography (IGC) from 303.15 K to 343.15 K.
Qiao-Na Zhu +3 more
doaj +1 more source
Analysis of coal quality in a function of selection level for mining at the open pit Gacko [PDF]
Mining and Metallurgy Engineering Bor, 2017 This work analyzes the quality of coal in the function level selection for exploitation. A detailed analysis was carried out for the main coal seam, the first floor seam, the second floor seam and the overlying coal series of the coal deposit Gacko of 0 ...
Stepanović Saša +3 more
doaj +1 more source
Analysis and countermeasures of key risk factors of coal mine safety production based on SNA
Meikuang Anquan, 2023 We analyze the coal mine accidents since 2008, extract 30 causes of coal mine safety accidents, and construct the coal mine safety production risk factor network by using social network analysis（ＳＮＡ）. Through the point centrality analysis of SNA network,
ZHOU Jianliang +5 more
doaj +1 more source
The mechanism of char ignition in fluidized bed combustors [PDF]
, 1987 Knowledge about ignition processes of coal in fluidized beds is of importance for the start-up and dynamic control of these combustors. Initial experiments in a transparent fluidized bed scale model showed the existence of a considerable induction period
Siemons, Roland V.
core +4 more sources