The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 131
... cost for the explosive decreases approximately 50 per cent , while the drilling cost increases 45 per cent . The cost for the drill hole ( Table 5 : 5 ) is 0.04 , 0.06 , 0.09 and 0.10 units higher for the blasting with AN - oil only ...
... cost for the explosive decreases approximately 50 per cent , while the drilling cost increases 45 per cent . The cost for the drill hole ( Table 5 : 5 ) is 0.04 , 0.06 , 0.09 and 0.10 units higher for the blasting with AN - oil only ...
Halaman 136
... cost for un- loading the material , for repair and maintenance of the machine equipment , is obtained . The cost for unloading the broken material is about the same as the minimum costs found here , and it is evident that if the costs ...
... cost for un- loading the material , for repair and maintenance of the machine equipment , is obtained . The cost for unloading the broken material is about the same as the minimum costs found here , and it is evident that if the costs ...
Halaman 411
... cost has to be 10 % higher , or 0.44 , 0.22 , 0.14 and 0.10 for alternative E in table 5 : 5 . The final cost in tables 5 : 6 is 0.53 , 0.31 , 0.23 and 0.19 . The alternatives C and D are also changed accordingly . Observe that the ...
... cost has to be 10 % higher , or 0.44 , 0.22 , 0.14 and 0.10 for alternative E in table 5 : 5 . The final cost in tables 5 : 6 is 0.53 , 0.31 , 0.23 and 0.19 . The alternatives C and D are also changed accordingly . Observe that the ...
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