The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 160
... round by ditch blasting . principles indicated above . The throw can to a certain extent be directed with the help ... round can be opened with a plough or fan cut , which in contrast to their application in tunneling can be given a much ...
... round by ditch blasting . principles indicated above . The throw can to a certain extent be directed with the help ... round can be opened with a plough or fan cut , which in contrast to their application in tunneling can be given a much ...
Halaman 179
... round with a ) 35 holes and 7 delays b ) 240 holes and 12 delays c ) 1000 holes and 25 delays . 2. A row of 20 holes in an open bench is to be blasted with short delay detonators of delay No. 5. Suppose that the rock is thrown away at a ...
... round with a ) 35 holes and 7 delays b ) 240 holes and 12 delays c ) 1000 holes and 25 delays . 2. A row of 20 holes in an open bench is to be blasted with short delay detonators of delay No. 5. Suppose that the rock is thrown away at a ...
Halaman 206
... round must be big enough to supply rock for the mucking equipment during one ( or two ) whole shift . This ordinarily means A≈4 m ( 13 ft ) comparatively independent of the tunnel section . The rounds should also offer a high degree of ...
... round must be big enough to supply rock for the mucking equipment during one ( or two ) whole shift . This ordinarily means A≈4 m ( 13 ft ) comparatively independent of the tunnel section . The rounds should also offer a high degree of ...
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