The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 99
... pressure in the tube is increased , and then suddenly released . In order to prevent too high velocities the pressure is limited to 3 atm over - pressure . The foot valve which supplies the compressed air is of a type which blows out ...
... pressure in the tube is increased , and then suddenly released . In order to prevent too high velocities the pressure is limited to 3 atm over - pressure . The foot valve which supplies the compressed air is of a type which blows out ...
Halaman 101
... pressure water . The potential energy of the pressure medium can be ignored because of the slight compressibility of the water . In this case the cartridges cannot be accelerated to high velocities by rapidly lowering the pressure . The ...
... pressure water . The potential energy of the pressure medium can be ignored because of the slight compressibility of the water . In this case the cartridges cannot be accelerated to high velocities by rapidly lowering the pressure . The ...
Halaman 350
... pressure in the water is considerably reduced when the charge is placed in rock below the water level . According to investigations by A. T. Edwards the pressure was reduced to only 10-14 % when the consumption of explosive was about ...
... pressure in the water is considerably reduced when the charge is placed in rock below the water level . According to investigations by A. T. Edwards the pressure was reduced to only 10-14 % when the consumption of explosive was about ...
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