METHOD FOR COMPLEX DEVELOPMENT OF COAL DEPOSIT Russian patent published in 2014 - IPC E21C41/00 

FIELD: mining.

SUBSTANCE: method includes performance of stripping and clearing mining works in opencast manner. At the same time working sites are arranged at the ledges with release of beds. As the cut reaches the border of the mining allotment along the depth, they arrange a cross-cut from the bottom of the stripping mine cut, and the cross-cut is made at a small angle upwards for organisation of self-flow hydraulic transport of coal, to open all beds of coal measures lying in the border zone. Along the beds indicated for further mining, from the cross cut to both sides at the small angle upwards they arrange drifts. On the soil of the cross cut and drifts they lay chutes for organisation of self-flow transport of pulp. From the working site of the ledge along with bed slope they drill a well to a drift, in which a hydraulic monitor and a pipe column are installed. Damage of the coal around the well is carried out by a hydraulic monitor jet in the reverse order. Broken coal is transported along chutes of the cross cut to the bottom of the cut, where it is accumulated in both and more reservoirs without mixing. For more efficient development of the field it is possible to mine simultaneously two and more beds with different compositions of the coal substance.

EFFECT: increased efficiency of complex development of coal field.

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