Results 21 to 30 of about 1,406,898 (336)
Nature, 1902 As England has taught the world how to use coal, she ought to think of teaching the world how to use coal without waste. Coal is so plentiful, so cheap; it is so much to the interest of many people that the waste should go on, and the general public, who alone can apply a remedy, are so ignorant of natural science that when, every few years, I draw ...
openaire +3 more sources
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
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Research into the process of preparation of Ukrainian coal by the oil aggregation method [PDF]
, 2009 We conducted a study into concentration of Donetsk coal with varying degrees of coalification – anthracite and grade G – by the method of oil aggregation. We determined the character of impact of the following factors on the results of oil aggregation of
Biletskyi, V. S. +8 more
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Journal of Degraded and Mining Lands Management, 2016 The purpose of this study was to determine the hydroseeding mulch optimum compositions for germination and productivity of a few species of local plants pioneer in the post-mining land of coal from South Kalimantan.
D. Azalia +2 more
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Rock and Soil Mechanics, 2021 In order to explore the impact of moisture on the mechanical properties of coal, the triaxial compression tests of raw coal with different moisture contents are carried out by using the triaxial servo-controlled seepage equipment for thermal-hydro ...
LI Bo-bo +5 more
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Meitan xuebaoTo obtain the activity patterns and response characteristics of the overburden strata under different fracturing degrees of the roof, and thereby provide a reference for preventing and controlling roof-dominated rock burst through regional fracturing ...
Jianhong WU +6 more
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An approach to the use of fixed carbon-volatile matter graph [PDF]
, 1986 The use of the fixed carbon-volatile matter (FC-VM) graph for quick calculations of proximate analysis data, as well as for simple presentation of coal classification is illustrated. From the position of the VM and FC values of a coal on the graph (on an
Jankes, Goran, Radovanović, Milan
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Fractal characterization of the coal surface [PDF]
Acta Montanistica Slovaca, 1998 The aim of this paper is to point up to the characterization of the brown coal using the fractal theory. On the base of BET measurements on the adsorption surface, the surface fractal dimension of crushed and milled coal samples have been determined ...
Miklúová Viera +3 more
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Poland’s Energy Security Strategy
Polish Political Science Yearbook, 2019 Poland, as one of the European countries experiencing the most significant economic growth in recent years, permanently relies on coal power. There are plenty of reasons behind this condition, however, wanting to become one of the European leaders Poland
Zuzanna Samson
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