The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 38
... bottom of a charge with the depth h and the concentration of charge 1. Q。 is a charge concentrated at the bottom with the same bottom effect as the extended charge lh . d . Distribution of the charge The bottom charge has been ...
... bottom of a charge with the depth h and the concentration of charge 1. Q。 is a charge concentrated at the bottom with the same bottom effect as the extended charge lh . d . Distribution of the charge The bottom charge has been ...
Halaman 40
... bottom charge ( Q ) is sufficient for breakage at a bench height of K = 2V , the charge which is required in addition to this when the bench height exceeds 2V is defined as column charge . The size of the column charge is QpQt - Q and ...
... bottom charge ( Q ) is sufficient for breakage at a bench height of K = 2V , the charge which is required in addition to this when the bench height exceeds 2V is defined as column charge . The size of the column charge is QpQt - Q and ...
Halaman 71
... bottom . The minimum column charge , not being influenced by the conditions at the bottom , is to be reduced 10 % . Drilling below the bottom level should be -0.3 V. The bottom charge extends to + V so that the height of the bottom charge ...
... bottom . The minimum column charge , not being influenced by the conditions at the bottom , is to be reduced 10 % . Drilling below the bottom level should be -0.3 V. The bottom charge extends to + V so that the height of the bottom charge ...
Isi
Symbols used | 16 |
Calculation of the charge General part | 28 |
Calculation of the charge Practical application | 69 |
Hak Cipta | |
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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