METHODS OF MECHANISED STEEP BANK EXCAVATION OF MEDIUM POWER IN BANDS DOWN DIP Russian patent published in 2014 - IPC E21C41/18 

FIELD: mining.

SUBSTANCE: invention relates to mining, to mechanised steep bank excavation of medium power in bands down dip. The method comprises preparation of the extraction column and extraction band by mining. At the junction of the mounting chamber with coal chute the second mounting chamber is made, which workspace is supported by face-end support strutted between the roof and the layer soil. Each layer of the soil is imparted with the horizontal gradient of not less than the angle providing gravity handling of the chipped coal on the chutes. The multislice mining of coal is carried out using a swept cutter tool, made in the form of a horizontally oriented drum with cutters mounted on the sides of the front section of the chute. Supply of the cutting tool is carried out by moving the front section of the chute to bottom hole, its moving in the opposite direction is carried out by moving the front section of the chute towards the coal chute. The direction of the drum rotation of the cutting tool provides cutting coal from the bottom upwards. The chute flight is enlarged using spare chutes, and the second mounting chamber is elongated to the extent of mining the layers in the band. Removal of stabilising pillar is carried out using cutting actuating tools of the sections of the expanding shield overlap.

EFFECT: invention enables to improve the efficiency and safety of mining by organising gravity handling of chipped coal.

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