The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 136
... regard to the ground vibra- tions and the risk of damage in the surroundings and , finally , the time needed for the work . With the intense development of methods for loading the drill holes with explosives in cartridges , one can ...
... regard to the ground vibra- tions and the risk of damage in the surroundings and , finally , the time needed for the work . With the intense development of methods for loading the drill holes with explosives in cartridges , one can ...
Halaman 289
... regard to the ground vibrations , provided that the charges do not co - operate . In the present case the interval time is T30 ms and the natural vibration time of the ground wave T≈ 10 ms , i.e. the condition 7 ≥2.5 T , has been ...
... regard to the ground vibrations , provided that the charges do not co - operate . In the present case the interval time is T30 ms and the natural vibration time of the ground wave T≈ 10 ms , i.e. the condition 7 ≥2.5 T , has been ...
Halaman 332
... regard to the deviations in drilling the burden is usually not more than 0.7 Vm and if a good fragmentation is not ... regards projection risk is achieved . The fault percentage is due to the fact that a number of holes cannot be loaded ...
... regard to the deviations in drilling the burden is usually not more than 0.7 Vm and if a good fragmentation is not ... regards projection risk is achieved . The fault percentage is due to the fact that a number of holes cannot be loaded ...
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