The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 273
... vibrations , which , in addition to acceleration effects , cause shearing stresses in minor parts . It is evident ... vibrations cause the wall to bend and this gives rise to elongation and compression in the upper part . The maximum ...
... vibrations , which , in addition to acceleration effects , cause shearing stresses in minor parts . It is evident ... vibrations cause the wall to bend and this gives rise to elongation and compression in the upper part . The maximum ...
Halaman 283
... vibration time , or double the value , t = T or 2T , it is impossible to avoid the co- operation of the vibrations from different charges . On the other hand , if the rounds in question have a large number of intervals , the shots that ...
... vibration time , or double the value , t = T or 2T , it is impossible to avoid the co- operation of the vibrations from different charges . On the other hand , if the rounds in question have a large number of intervals , the shots that ...
Halaman 295
... vibration . a ) For what accelerations will it loose contact with the ground ? b ) Calculate the relation between the suspended mass and the unsuspended one if vibrations with up to a 8 g are to be accurately recorded . = 2. Calculate ...
... vibration . a ) For what accelerations will it loose contact with the ground ? b ) Calculate the relation between the suspended mass and the unsuspended one if vibrations with up to a 8 g are to be accurately recorded . = 2. Calculate ...
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