METHOD TO DEVELOP THICK STEEPLY-DIPPING ORE BODIES Russian patent published in 2014 - IPC E21C41/22 E21F15/08 

FIELD: mining.

SUBSTANCE: method to develop thick steeply-dipping ore bodies includes division of an ore body into layers developed in descending order, extraction of layers by stopes and filling of the mined space with hardening materials, definition of places of location and dimensions of cavities of cavings above the filling mass, arrangement of stopes as cut to the filling mass, supply of hardening materials along cutting stopes to places for additional filling of cavities of cavings above the filling mass. Before approach of the bottomhole of the cutting stope to the cavity of the caving arranged above the filling mass, arrangement of the cutting stope is stopped, two wells are drilled from the cutting stope towards the upper border of the caving cavity, one of wells is used for supply of hardening material to the cavity of the caving, in the second well they remove air from the caving cavity into the cutting stope, after filling of the caving cavity and achievement of the normative values of strength by the filling material, they continue arrangement of the cutting stope, besides, the minimum permissible distance from the bottomhole of the cutting stope to the cavity of the caving during performance of works for filling of the caving cavity is accepted as more than the depth of the zone of intensive damage of rock massif by the mountain pressure upstream the bottomhole of the cutting stope.

EFFECT: increased completeness of filling of mined space, reduced labour intensiveness of works related to filling of mined space, and increased safety of mining works.

2 dwg