FIELD: mining; applicable in mineral opencast mining. SUBSTANCE: method includes drilling of holes of slot, loading of holes with explosive charges and their blasting with subsequent working of contour strip. Holes are drilled by drilling machine whose longitudinal axis is positioned at angle to slot stretching. Said angle value is determined by formula γ = arcsin(tgα/tgβ), where γ is angle between machine longitudinal axis and slot stretching direction, deg; α is angle of inclination of drilling machine rod, deg; β is angle of inclination of prepared slope, deg. Minimal width of berm is determined by formula L = asinγ+0,5bcosγ+c, where L is minimal width of berm, m; a is length of drilling machine, m; b is drilling machine width, m; c is safe distance from drilling machine to overlying slope, m. EFFECT: higher efficiency of drilling equipment operation in making of slopes, extended range of angles of inclination of bank slopes. 3 dwg
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