aInstitute of Natural Resources, Tomsk Polytechnic University, Tomsk, Russia
bKuznetsk Center, AO Vostochnyi Nauchno-Issledovatel’skii Uglekhimicheskii Institut (VUKhIN), Novokuznetsk, Russia
Correspondence to: *e-mail: ivp2005@mail.ru
Correspondence to: **e-mail: vuhin2013@yandex.ru
Received 15 November, 2016
Keywords: coal, classification, metamorphic development, applications of coal, coal resources, carbon-based reducing agents, technological value
DOI: 10.3103/S1068364X16120061