GEOMETRY DESIGN OF ANDESITE BLASTING USING THE MODERN TECHNIQUE OF ROCK BALASTING METHOD DESAIN GEOMETRI PELEDAKAN ANDESIT DENGAN METODE THE MODERN TECHNIQUE OF ROCK BALASTING

Abstract

Blasting geometri design using The Modern Techque Of Rock Blasting Method given result of burden (B) 2.621cm, space (S) 3.276 cm , stemming (T) 2.621 cm, sud drilling (U) 0.9 cm, scooting depth 13.629 cm, grade 100- 150, higth of bench 12.285 cm. from the design resulting in blast production of 1051.338 ton, powder factor of and explosive material use is 1589.751 kg/m3 whith the maximum fragmentation size of 28.02 cm