DETERMINATION OF RATIONAL DRILLING AND BLASTING PARAMETERS TO ENSURE STABILITY OF EDGES OF OPEN-PIT MINES IN THE BYSTRINSKY DEPOSIT
A. A. Eremenko, V. N. Filippov
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Rock mass, open pit edge, seismic impact, controlled blasting, slope angle, dikes, rock stability
Abstract
To protect the rock mass on the boundary of open-pit edges from failure and reduce the seismic impact of drilling and blasting operations on it, it is planned to set the edges of the open-pit mines to the limit position by the method of controlled blasting. It is shown that, when the direction and angles of bench slope coincide with the direction and angles of slope of the rock mass weakening (dikes, cracks, bedding, etc.), rock caving occurs at the stage of controlled blasting, followed by sloughing of highly fractured rocks fragmented by blasting. Rock stability zones were determined at different horizons of the Bystrinsky 2 and Verkhne-Ildikansky open-pit mines. The schemes for the location of charges and their design under various mining-geological and geotechnical conditions are proposed.
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