The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 51
... rock only cracks in some few large blocks . The flow of the gases can be concentrated more readily in a single direction if the charge is not capable of loosening and breaking up the burden . This may be due to too great fixation of the ...
... rock only cracks in some few large blocks . The flow of the gases can be concentrated more readily in a single direction if the charge is not capable of loosening and breaking up the burden . This may be due to too great fixation of the ...
Halaman 181
... rock constant c = 0.4 , explosive with weight strength s = 1.0 and a degree of packing of P = 1.25 kg / dm3 . The value c = 0.4 for the rock factor includes a normal variation in the rock . In non - homogeneous rock the angle of ...
... rock constant c = 0.4 , explosive with weight strength s = 1.0 and a degree of packing of P = 1.25 kg / dm3 . The value c = 0.4 for the rock factor includes a normal variation in the rock . In non - homogeneous rock the angle of ...
Halaman 296
... rock are of a permanent character . A number of them include important buildings such as work - shops , power stations , staff premises , oil stores , etc. Inconvenience and expense are generally incurred in such undertakings if blocks ...
... rock are of a permanent character . A number of them include important buildings such as work - shops , power stations , staff premises , oil stores , etc. Inconvenience and expense are generally incurred in such undertakings if blocks ...
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