METHOD OF FORECAST OF EXPLOSION HAZARD OF METHANE DUST MIXES DURING COAL DESTRUCTION

摘要

FIELD: mining.;SUBSTANCE: method of forecast of explosion hazard of firedamps during coal destruction is offered which comprises the determination of methane content of unworked coal, yield of amount of volatile substances, microcomponents of petrographic composition of coal and mineral admixtures in it, measuring of specific dust suppression and identification of criterion of dust explosivity. Meanwhile in coal beds of a mine field the sections with inclusions of pyrite are identified alongside with determination of methane content of unworked coal, volatile content of matters and content of fine dispersed dust of pyrite, parent dust in pores of coal and volumes of free coal fragments of the dust capable at coal destruction to pass into suspended state in a mine air. The quantitative connection between methane content of unworked coal and specific dust emission in the zone of coal destruction by machine cutting head is established. Besides, the offered method envisions the determination in the zone of coal destruction of methane concentration of and the content of fine dispersed dust of pyrite, thermal disintegration of which results in emission of hydrogen sulphide, which decrease the burning point of methane dust air mixes, and also the establishing of quantitative connection between the criterion of dust explosivity and petrographic differentials of coal bed.;EFFECT: improvement of reliability of the forecast of explosion hazard of methane dust air mixes.;3 cl