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

FIELD: mining.

SUBSTANCE: invention refers to mining, particularly to development of steeply inclined coal beds of medium thickness with long pillars along strike, when pillars are extracted in strips along decline. The method of development between discontinuities consists in preparing an extraction pillar by driving transport and ventilation drifts, and in profiling mining strip between two mining-geological discontinuities with driving the pillar of coal shoot on a flank parallel to flank line of continuity fracture of coal containing massif; the pillar of coal shoot is equipped with a man way compartment; the ventilation drift is equipped with an assembling chamber, wherein sections of powered roof support are installed; the said sections are structurally connected with an actuator made in form of a projecting arm equipped with a horizontally installed worm cutting tool. The sections of the roof are connected between them with hydraulic jacks of support advancing and are put into operation successively, shaping banks in mining face; coal is cut first at the flank from the coal shoot and further to the ventilation drift. Mining of coal is performed alternately in all banks; broken coal is transported simultaneously-successively to coal shoot. Ventilation of the mining face is executed by all-mine depression. At final stages of strip mining, in worked out space of the strip there is constructed the second slope, the ventilation slope for facilitating ventilation of the mining face and arrangement of an escape way.

EFFECT: invention facilitates increasing efficiency of coal mining.

6 dwg