METHOD FOR BUILDING NON-WORKING QUARRY EDGE Russian patent published in 2005 - IPC

FIELD: mining industry.

SUBSTANCE: method includes cutting steps with varying angles. Angles of double step slopes, different on basis of quarry depth, are formed with consideration of decrease of irregularity parameters with deposit depth, with natural block level of upper horizons and influence from mass explosions and wind erosion of rocks with gradual increase of their steepness until forming of vertical slopes of double steps during additional operations in quarry, while angles of slopes and edge portions on upper horizons in highly fractured rocks may be 50-55°, in rocks of average and non-specific fracture levels - 70-60° and in low-fractured rocks may be 80-85°, and edge portions 60-90 m high in deep portion of quarry with vertical double steps and preventive berms 10 m have slant angle 80-85°.

EFFECT: higher efficiency.

6 dwg, 1 tbl, 1 ex