The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 85
... obtained with 1.5 m ( 5 ft ) uncharged at the top of the hole . As indicated in table 2 : 4 this corresponds to a size of boulders of less than 1/8 m3 ( 1/6 cu.yd ) , which in most cases should be sufficient . Some bigger ones will of ...
... obtained with 1.5 m ( 5 ft ) uncharged at the top of the hole . As indicated in table 2 : 4 this corresponds to a size of boulders of less than 1/8 m3 ( 1/6 cu.yd ) , which in most cases should be sufficient . Some bigger ones will of ...
Halaman 255
... obtained are in accordance with tables 8 : 4- 8 : 5 the last column gives . x = 1.00 . With this notation the x ... obtained with spacing and concentration of the charge according to the calculations . Even cases with a lower ...
... obtained are in accordance with tables 8 : 4- 8 : 5 the last column gives . x = 1.00 . With this notation the x ... obtained with spacing and concentration of the charge according to the calculations . Even cases with a lower ...
Halaman 338
... obtained are still too big this is often due to faulty sequence of ignition through flash - over and there is no ... obtained in the following way . The profile with the drill holes of diameter d , is drawn as in fig . 11 : 6 . The ...
... obtained are still too big this is often due to faulty sequence of ignition through flash - over and there is no ... obtained in the following way . The profile with the drill holes of diameter d , is drawn as in fig . 11 : 6 . The ...
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