STRIPE-ALONG-PITCH METHOD OF DEVELOPMENT OF THICK STEEPLY INCLINED COAL BED Russian patent published in 2009 - IPC E21C41/18 

FIELD: mining.

SUBSTANCE: method consists in preparing extraction pillar by driving transport and ventilation entries, in delineation of extracted stripe with coal chutes and air shafts along bed pitch line from transport to ventilation entry on both sides of stripe, in driving assembly chamber at ventilation entry, in constructing sections of powered roof support in assembly chamber, in mechanized mining of coal in step-like mining face in two layers, in forced transporting of coal along face and self-flowing transporting from upper layer to lower one and from step to step to transport entry, and in ventilating mining face by all-mine depression. Working space under each section of support is profiled with insignificant advanced mining of coal in the lower layer and with leaving temporary support massif at the support of the bed in the upper layer extracted before displacing sections of support at the final stage of extraction of the stripe of each section. The boundary of the upper layer is profiled along arc equal to radius of turn of a panel ceiling. An outlet opening is cut from working space of the lower layer of the extracted stripe to the transport entry limiting its height by the height of transport position of the support section. The section of the support is driven to a transport position, further it is removed to the transport entry through the outlet opening, and the outlet opening is backfilled with materials not subject to repeated utilisation.

EFFECT: increased efficiency and safety of development.

5 dwg