The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 156
... necessary to leave the remaining rock walls undamaged and with as smooth a surface as possible , the side contours of the round could be blasted with presplitting or ordinary careful blasting as indicated on the right side of the round ...
... necessary to leave the remaining rock walls undamaged and with as smooth a surface as possible , the side contours of the round could be blasted with presplitting or ordinary careful blasting as indicated on the right side of the round ...
Halaman 177
... necessary to reduce the burden and the distance between holes . More infrequently , the depths of the holes are reduced as this factor is usually determined in advance from given dimen- sions . On the other hand , it is not necessary ...
... necessary to reduce the burden and the distance between holes . More infrequently , the depths of the holes are reduced as this factor is usually determined in advance from given dimen- sions . On the other hand , it is not necessary ...
Halaman 326
... necessary to count on faulty col- laring of 0.2 m ( 0.7 ft ) and errors in alignment of 5 cm per m ( 5 % ) or more . In drilling with rigid platforms the faults in collaring depend on the depth to the rock face , and the mistake in ...
... necessary to count on faulty col- laring of 0.2 m ( 0.7 ft ) and errors in alignment of 5 cm per m ( 5 % ) or more . In drilling with rigid platforms the faults in collaring depend on the depth to the rock face , and the mistake in ...
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