METHOD FOR DEGASSING COAL-ROCK MASSIF AT DEVELOPMENT OF GROUP OF COAL SEAMS

摘要

A method for degassing coal-rock massif at development of group of coal seams includes preparation of extraction lava column within coal seam, formation in additional working-collector that is placed over the coal seam of separated gas-collection horizon, drilling in floor of working-collector of degassing wells, mounting degassing system and carrying out degassing of coal-rock massif through forced gas extraction through drilled degassing wells. For conditions of the face one determines height of safe underworking, as working-collector one uses operating development working of adjacent coal seam that is separated by distance not smaller than that height.