The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 62
... vertical scale after a vertical deflection from " fixed bottom " down to " free bottom " . Example 2 : 4 . To decide the magnitude of the rock factor co a part of the rock is taken where no evident cracks and crevices influence an ...
... vertical scale after a vertical deflection from " fixed bottom " down to " free bottom " . Example 2 : 4 . To decide the magnitude of the rock factor co a part of the rock is taken where no evident cracks and crevices influence an ...
Halaman 151
... vertical holes the marking of their position and the drilling are easier than for inclined ones . In return , the risk of stumps and incomplete tearing at the bottom is considerably greater than with inclined holes . This is ...
... vertical holes the marking of their position and the drilling are easier than for inclined ones . In return , the risk of stumps and incomplete tearing at the bottom is considerably greater than with inclined holes . This is ...
Halaman 333
... vertical bench height of at least 15d - 18d for the second row . In both cases the first row breaks the rock through cratering ( compare fig . 8:14 ) . Example 11 : 3 . With d = 50 mm ( 2 in ) and vertical holes we have for K = 0 E1 ...
... vertical bench height of at least 15d - 18d for the second row . In both cases the first row breaks the rock through cratering ( compare fig . 8:14 ) . Example 11 : 3 . With d = 50 mm ( 2 in ) and vertical holes we have for K = 0 E1 ...
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