The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 8
... important stages of the research work . H. L. Selberg has revised the first chapter and he and C. H. Johansson have made essential contributions to the present knowledge of the mechanics of breakage . I must make special reference to ...
... important stages of the research work . H. L. Selberg has revised the first chapter and he and C. H. Johansson have made essential contributions to the present knowledge of the mechanics of breakage . I must make special reference to ...
Halaman 85
... important it is in single row blasting for the economy of the job to have good drilling precision , to arrange for it and check the drilling on the site . In multiple - row blasting it is not as important to cut the deviations in the ...
... important it is in single row blasting for the economy of the job to have good drilling precision , to arrange for it and check the drilling on the site . In multiple - row blasting it is not as important to cut the deviations in the ...
Halaman 304
... important from another point of view to keep the spread in ignition time below 100 ms . In fissured rock there is a tendency for charges to be ejected by the detonation gases in neighboring holes . Fig . 10:11 shows a close - up of a ...
... important from another point of view to keep the spread in ignition time below 100 ms . In fissured rock there is a tendency for charges to be ejected by the detonation gases in neighboring holes . Fig . 10:11 shows a close - up of a ...
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