METHOD OF DEVELOPMENT OF STEEPLY INCLINED COAL BEDS OF MEDIUM THICKNESS BETWEEN HITCHES Russian patent published in 2009 - IPC E21C41/18 

FIELD: mining.

SUBSTANCE: invention refers to development of steeply inclined coal beds of medium thickness with long pillars along course of bed extracted by strips along pitch. The method is implemented between hitches and includes preparing an extraction pillar by leading transport (1) and ventilation (2) entries, contouring an extracting strip with coal (3) and ventilation chutes along the line of the bed pitch from the transport entry till ventilation entry on both sides of the strip; arranging assembly chamber 4 at ventilation entry 2, assembling therein sections 5 of a mechanised face support. Coal chute 3 is led on flank of the extraction pillar along the line of bed pitch from one side of the extracted strip. The first section 5 of the mechanised face support is assembled in the range of coal chute 3. Sections 5 of the mechanised face support are tied between them with thrusting jacks. At an initial stage of coal extraction a mining face is formed as a rise step entry; additional sections 5 of the face support are in turn assembled and put into operation. At a final stage the width of the extracted strip is limited and open area is separated from massif with a face support. A ventilation chute along the bed pitch from the counter side of the strip is arranged in its extracted space behind the last section 5 of the face support. Coal is extracted at each section 5 separately. Loose coal is transported along the mining face with transfer of transport flow from one extracting-transporting body to another using self-flow transporting from step to step.

EFFECT: increased efficiency of coal extraction.

3 dwg