The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 74
... figures including 10 % greater margin are given . The rock factors may vary from c = 0.1-1.4 , and the corresponding figures for the consumption of explosive are c = 0.15–1.45 kg / m3 ( 0.25–2.5 lb / cu.yd ) for the bottom part . How ...
... figures including 10 % greater margin are given . The rock factors may vary from c = 0.1-1.4 , and the corresponding figures for the consumption of explosive are c = 0.15–1.45 kg / m3 ( 0.25–2.5 lb / cu.yd ) for the bottom part . How ...
Halaman 131
... Figures for the drilling costs vary considerably from various working places . This often causes uncertainty in the discussion on the final costs for the excavation . It is not unusual that the contractors calculate with costs for the ...
... Figures for the drilling costs vary considerably from various working places . This often causes uncertainty in the discussion on the final costs for the excavation . It is not unusual that the contractors calculate with costs for the ...
Halaman 238
... figures indicate the probability of a hit within a corresponding area between two circles . 35 % of the opening holes will be wrongly placed at the bottom . The figure increases to 53 % if the distance between the centers of the cut ...
... figures indicate the probability of a hit within a corresponding area between two circles . 35 % of the opening holes will be wrongly placed at the bottom . The figure increases to 53 % if the distance between the centers of the cut ...
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