METHOD OF MINING HEAVY STEEPLY DIPPING DEPOSITS OF UNSTABLE ORE Russian patent published in 2014 - IPC E21C41/22 

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used in underground mining of heavy steeply dipping deposits of unstable ores. The method of mining heavy steeply dipping deposits of unstable ore comprises separating the ore body to floors, and floors - to horizontal or low-inclined layers mined in descending order. The ore excavation within the second and subsequent layers under the filling array is carried out in stopes using combines of selective action. Transporting ore in stopes is carried out by load-haul-dumpers. The stopes after their passing are filled with hardening materials. The stopes of first order pass through the ore array, coal-cutting with stone stopes pass between the filling arrays created in adjacent stopes of the first order. When passing of the stopes of first order, their lateral surfaces in the lower parts adjacent to the base of stope, are shaped as planes perpendicular to the horizontal plane, in the upper parts adjacent to the roof, the lateral surfaces of the stopes of first order are shaped as planes inclined toward the adjacent coal-cutting with stone stopes. And the height of the lower parts of the lateral surfaces of stopes adjacent to the base of stope are raised to the height of load-haul-dumper, and the angle between the upper inclined parts of the side surfaces of the stope and the horizontal plane is determined from the expression.

EFFECT: invention enables to increase the rate of passing of the coal-cutting with stone stopes, to improve safety of mining operations.

2 dwg