METHOD OF DEVELOPMENT OF THICK STEEP COAL BED IN STRAPS DOWNSTREAM Russian patent published in 2012 - IPC E21C41/18 

FIELD: mining.

SUBSTANCE: method of development of thick steep coal bed in straps downstream includes preparation of extraction pillar by driving of conveyor and ventilation gates, preparation of extraction line by driving flank and near chutes along dip line near layer soil from conveyor to ventilation gate along both sides of line, driving of mounting chamber near ventilation gate, support pillar being left, mounting of expandable back-connected overlap of support in it, coal layer mining in mining face by development machine with actuating element designed as horizontal directed drum with cutters, forced transportation of coal along face by self-propelling car and ventilation of cleaning face due to mine ventilating pressure drop. Soil of each layer is tapered not exceeding slope angle allowed for development machine and self-propelling car, coal is transported along mining face by self-propelling car to flank chute when slope of extracted layer is towards near chute, or to near coal chute when slope of extracted layer is towards flank chute. Change in direction of layer slope is performed when self-propelling car and development machine are changed over and turned in chamber, which is driven outside mining line and used again during extraction of neighbouring mining line with balanced orientation of extracted layers.

EFFECT: invention allows increasing efficiency and safety of extraction.

6 dwg