The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 296
... close to the roof that it cannot be inspected once the in- terior of the building has been completed . In this form of construction it is highly desirable to blast the roof of the rock as close to the theoretical section as possible so ...
... close to the roof that it cannot be inspected once the in- terior of the building has been completed . In this form of construction it is highly desirable to blast the roof of the rock as close to the theoretical section as possible so ...
Halaman 304
... close - up of a rock face which has been blasted with gurit pipe charges for smooth blasting , using short delay detonators of the same interval number ( No. 1 ) . The drill holes remain unbroken up to where the bottom charge has been ...
... close - up of a rock face which has been blasted with gurit pipe charges for smooth blasting , using short delay detonators of the same interval number ( No. 1 ) . The drill holes remain unbroken up to where the bottom charge has been ...
Halaman 305
... close to the presplit row or that the preslit holes have to be charged once more with bottom charges and ignited in the main round . This is a drawback for the method compared with ordinary smoothing and so is the fact that in ...
... close to the presplit row or that the preslit holes have to be charged once more with bottom charges and ignited in the main round . This is a drawback for the method compared with ordinary smoothing and so is the fact that 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