The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 50
... Short delay rounds " . The slope of the lines can be compared with the curves departing from origo and which show the throw energy if 100-16 % of the total power of the explosive should be converted into throw . The comparison shows ...
... Short delay rounds " . The slope of the lines can be compared with the curves departing from origo and which show the throw energy if 100-16 % of the total power of the explosive should be converted into throw . The comparison shows ...
Halaman 139
U. Langefors, Björn Kihlström. 6. SHORT DELAY BLASTING MULTIPLE - ROW ROUNDS The introduction of short delay blasting with delays of the order of 1-100 ms has caused a revolution in the technic of rock blasting . It has made it possible ...
U. Langefors, Björn Kihlström. 6. SHORT DELAY BLASTING MULTIPLE - ROW ROUNDS The introduction of short delay blasting with delays of the order of 1-100 ms has caused a revolution in the technic of rock blasting . It has made it possible ...
Halaman 152
... short delay blasting , when it was necessary to prevent the electrical wires in the row immediately behind from being torn off at the detonation . This aspect still applies when ignition is carried out with a detonating fuse . When using ...
... short delay blasting , when it was necessary to prevent the electrical wires in the row immediately behind from being torn off at the detonation . This aspect still applies when ignition is carried out with a detonating fuse . When using ...
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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