The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Symbols used | 16 |
Calculation of the charge General part | 28 |
6 | 38 |
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advance per round Ammonit amplitude AN-oil angle of breakage applies bench blasting bench height blasting gelatine bottom charge burn cuts calculated cartridges cm/m column charge concentration of charge connection contour corresponding cracks cylinder cuts damage degree of packing deviation diagram distance dm³ drill hole drilled depth drilling pattern dynamite effect empty hole energy example explosive faults flash-over fragmentation frequency gives greater ground vibrations ignition pattern increased indicated instantaneous interval kg/m kg/m³ Langefors-Kihlström lb/cu.ft lb/ft less loader lower maximum burden meter mm/s multiple-row rounds Nabit Nitroglycerin Nonel number of holes obtained ordinary delay overcharge parallel hole cuts pneumatic possible presplitting pressure reduced risk rock blasting rock factor row of holes shock wave slope smooth blasting specific charge sq.ft stoping Sweden Täby throw tion tunnel underwater blasting V₁ vertical vibration velocity vibrogram weight strength width