The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 177
... carried out in accordance with a prearranged plan . For this purpose it is necessary , when planning , to be able to calculate both the amount of the charge required and the anticipated fragmentation ( Table 2 : 4 ) . In order to make ...
... carried out in accordance with a prearranged plan . For this purpose it is necessary , when planning , to be able to calculate both the amount of the charge required and the anticipated fragmentation ( Table 2 : 4 ) . In order to make ...
Halaman 205
... carried out between two shifts . When the operation can be carried out in several neighboring drifts in mining it is possible even with small advances to use different and specialized crews for the blasting and mucking . TABLE 7 : 3 ...
... carried out between two shifts . When the operation can be carried out in several neighboring drifts in mining it is possible even with small advances to use different and specialized crews for the blasting and mucking . TABLE 7 : 3 ...
Halaman 293
U. Langefors, Björn Kihlström. the blasting shall be carried out as originally intended or whether the following alternatives should be adopted : I. That the blasting be carried out in accordance with a level above 0 06 in fig . 9:21 ...
U. Langefors, Björn Kihlström. the blasting shall be carried out as originally intended or whether the following alternatives should be adopted : I. That the blasting be carried out in accordance with a level above 0 06 in fig . 9:21 ...
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