Bezpoklesové dobývání v ochranných pilířích jam Dolu ČSM

Abstract

This thesis is devoted to getting by without a drop in mining Room-pillar method, with stable pillars between the chamber as one of the options in protective pillars mining pits. Great attention should be given sizing calculation pillars on the left size of coal pillars and the extraction ratio, which is an important economic indicator. The main part consists of the proposal opening, preparation and extraction of coal seam No. 30 in the protective pillars race pits North Mine CSM. The conclusion summarizes the safety aspects of mining.