METHOD FOR UNDERGROUND DEVELOPMENT OF GENTLY SLOPING AND INCLINED ORE BODIES Russian patent published in 2020 - IPC E21C41/22 

FIELD: mining.

SUBSTANCE: invention relates to mining and, in particular, to underground development of gently sloping and inclined ore bodies of low power. Each layer in the cleaning space is developed in three stages. At the first stage along the upper boundary of the layer there pass horizontal drilling drift for the whole length of the cleaning block. At the second stage, the developed layer is used to pre-drill the developed layer with parallel wells perpendicular to the drilling, ore body is broken for the whole length of the block by sections, harvesting of broken ore mass and building up as far as the working face of the row of the support is moved on the boundary between the cleaning space and the mine working. At the third stage, drilling rocks are used to drill the enclosing rocks in the roof of the mined space with vertical fans of rock wells and forced collapse of roof rocks over the entire length of the layer being developed.

EFFECT: invention increases efficiency and safety of extraction grooves.

1 cl, 4 dwg