THE RELATIONSHIP OF GRAIN-SIZE COMPOSITION AND INTENSITY OF FRAGMENTATION AT DIFFERENT TECHNOLOGIES OF COAL SEAMS
One of the most important characteristics of coal quality is its grade determined by fractional composition. It is known that the increase in the yield of re-crushed coal during its production causes great material damage to the national economy. At the same time, the costs of its enrichment sharply increase, losses during transportation increase, and when it is burned in furnaces, coal fractions less than 6 mm do not burn, but are carried into the pipes in the form of dust, which is a powerful source of dust in the air basin. Based on this, the problem of regulation of the fractional composition of fossil coals in their development becomes particularly acute and urgent.