PROCEDURE FOR DEGASSING GAS BEARING ORE AND COAL DEPOSITS AT DEVELOPMENT OF MINERALS

摘要

FIELD: mining.;SUBSTANCE: spatially oriented boreholes are drilled in degassed massif. Heads of boreholes are sealed and cased with a perforated pipe. Additional vacuum-pump aggregates are installed at each head of a borehole cluster. The aggregates perform forceful withdrawal of gas mixture to a central vacuum station. Additional facilities of gas mixture withdrawal, installed before each borehole cluster, function as a flushing aggregate during drilling. Simultaneously they loosen and dynamically affect a bottomhole zone of each borehole. By rotating the functions of line for pressurising suction the same pump aggregates operate for pumping out methane-air mixture from the cluster of boreholes.;EFFECT: increased efficiency of gas recovery of formation and of methane withdrawal, reduced gas contents in mine developments, increased safety of mining related to gas factor.;4 dwg