The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 87
... compressed . Another method is to cut the case with two diametrical incisions lengthways . This is not appropriate , however , in fissured rock where the cartridges are apt to stick in the drill hole . There is less need to perforate or ...
... compressed . Another method is to cut the case with two diametrical incisions lengthways . This is not appropriate , however , in fissured rock where the cartridges are apt to stick in the drill hole . There is less need to perforate or ...
Halaman 88
... compressed air In Germany and Austria a method has been developed for blowing in the cartridges with compressed air through a metal tube which is inserted in the drill hole . The cartridges are given a great velocity so that they are ...
... compressed air In Germany and Austria a method has been developed for blowing in the cartridges with compressed air through a metal tube which is inserted in the drill hole . The cartridges are given a great velocity so that they are ...
Halaman 99
... compressed air in a loading tube 7.5 m in length . Every point represents 15 tests . The investigation shows that none of the cartridges of dynamite with 35 % NG1 was initiated until the velocity exceeded 106 m / s at 15 ° C , and 80 m ...
... compressed air in a loading tube 7.5 m in length . Every point represents 15 tests . The investigation shows that none of the cartridges of dynamite with 35 % NG1 was initiated until the velocity exceeded 106 m / s at 15 ° C , and 80 m ...
Isi
Symbols used | 16 |
Calculation of the charge General part | 28 |
6 | 38 |
Hak Cipta | |
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Istilah dan frasa umum
advance per round Ammonit amplitude AN-oil angle of breakage applies bench blasting bench height blasting gelatine bottom charge burn cuts calculated cartridges cm/m column charge concentration of charge connection contour corresponding cracks cylinder cuts damage degree of packing deviation diagram distance dm³ drill hole drilled depth drilling pattern dynamite effect empty hole energy example explosive 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/ft less loader lower maximum burden meter mm/s multiple-row rounds Nabit Nitroglycerin Nonel number of holes obtained ordinary delay overcharge parallel hole cuts pneumatic possible presplitting pressure reduced risk rock blasting rock factor row of holes shock wave slope smooth blasting specific charge sq.ft stoping Sweden Täby throw tion tunnel underwater blasting V₁ vertical vibration velocity vibrogram weight strength width