Relationship of Iron and Sulfur Inclusions in Fossil Coals
with Their Tendency to Gas-Dynamic Phenomena
E. V. Ulyanovaa,*, O. N. Malinnikovaa,**, B. N. Pashicheva,***, and M. O. Dolgovaa,****
a Melnikov Research Institute of Problems of Comprehensive Exploitation of Mineral Resources,
Russian Academy of Sciences, Moscow, 111020 Russia
Correspondence to: *e-mail: ekaterina-ulyanova@yandex.ru
Correspondence to: **e-mail: olga_malinnikova@mail.ru
Correspondence to: ***e-mail: borisnik-pa@yandex.ru
Correspondence to: ****e-mail: dol52@mail.ru
Received 16 September, 2019
Abstract—X-ray fluorescence analysis was used to study the composition of mineral inclusions in outburst-prone coal bed. A relationship between the presence of iron-containing compounds and sulfur in coals with their tendency to gas-dynamic phenomena was revealed. It was found that coal outbursts from the Pechora and Donets basins contained several times more iron than coals from non-hazardous zones of in the same coal bed. The predominance of iron over sulfur in outburst coal relative to a stoichiometric ratio between them in pyrite and, similarly, the predominance of sulfur content in coals from the zones of bed unprone to outbursts were determined.
Keywords: fossil coal, gas-dynamic phenomena, mineral inclusions, outburst zones of a coal bed, pyrite, iron, sulfur
DOI: 10.3103/S0361521920020111