The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 80
... question of a large crevice , only a pipe charge may be required . The rock factor in itself is about the same as for ordinary rock and can be taken as c = 0.4 . In sedimentary rock it is more a question of weak faces than crevices ...
... question of a large crevice , only a pipe charge may be required . The rock factor in itself is about the same as for ordinary rock and can be taken as c = 0.4 . In sedimentary rock it is more a question of weak faces than crevices ...
Halaman 176
... question of medium wave lengths . The effect values ( kW ) refer to a uniform distribution . It should be observed that many stations have a concentration of the energy in one main direction . The station of Stockholm ( Nacka ) , for ...
... question of medium wave lengths . The effect values ( kW ) refer to a uniform distribution . It should be observed that many stations have a concentration of the energy in one main direction . The station of Stockholm ( Nacka ) , for ...
Halaman 416
... question is : can this charge be used and the row in question thus have the same burden and spacing as the main part of the round ? 1 The extended charge corresponds to a concentrated single charge of about the size 2 IR at the distance ...
... question is : can this charge be used and the row in question thus have the same burden and spacing as the main part of the round ? 1 The extended charge corresponds to a concentrated single charge of about the size 2 IR at the distance ...
Isi
Symbols used | 16 |
Calculation of the charge General part | 28 |
Calculation of the charge Practical application | 69 |
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Istilah dan frasa umum
advance per round Ammonit ammonium nitrate AN-oil angle of breakage bench blasting bench height blasting gelatine bottom charge burn cuts calculations cartridges cm/m column charge concentration of charge connection corresponding cracks cylinder cuts damage degree of packing detonators deviation diagram distance dm³ drill hole drilled depth drilling cost drilling pattern dynamite effect electric empty hole energy example 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/cu.yd lb/ft loading tube lower maximum burden meter multiple-row rounds Nabit Nitroglycerin Nonel number of holes obtained ordinary delay parallel hole cuts practical burden presplitting pressure reduced risk rock blasting rock factor row of holes shock wave slope smooth blasting specific charge sq.ft stoping Sweden swelling Täby throw tion tunnel underwater blasting V₁ velocity vertical weight strength width