LAYER DEVELOPMENT METHOD OF THICK STEEPLY INCLINED COAL FORMATION Russian patent published in 2012 - IPC E21C41/18 

FIELD: mining.

SUBSTANCE: invention refers to mining operations, to powered development of thick steeply inclined coal formations. The method involves preparation of extraction pillar of gates, preparation of extraction strip by performing coal chute and ventilation workings from conveyor to ventilation gate, removal of erection chamber at interface of extraction strip to ventilation gate so that the formation is separated as to thickness into two inclined layers. Sections of the support are mounted in erection chamber on soil of each layer, and flexible covering in the form of mesh, which covers the interlayer patch and section of the support, which is installed at the formation bottom, is mounted on the layer soil at the formation roof. Coal is extracted in inclined layers at the roof and bottom of formation using a mining machine in flat layers with transportation of broken coal to the end slope at inclination of layer towards the nearest slope and to the nearest slope at layer inclination towards the end slope. The above machine is turned in the chamber performed beyond the limits of extraction strip. Coal pillars are destructed with actuating elements of sections of modular support, broken coal of the gate-end pillar is transported to conveyor gate via wells or with scrapers, and interlayer patch is divided into portions as the mining face of layer at the formation roof advances, destructed with pressure of broken rocks after the covering and delivered to working space of layer at the formation bottom.

EFFECT: invention allows increasing efficiency and safety of development.

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