The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 29
... proportion to the radius of the charge , whether it is a question of a cylindrical or a spherical charge . In purely elastic processes the so - called " law of conformity " applies with great accuracy . It indicates that theoretically ...
... proportion to the radius of the charge , whether it is a question of a cylindrical or a spherical charge . In purely elastic processes the so - called " law of conformity " applies with great accuracy . It indicates that theoretically ...
Halaman 54
... proportion to d / d1 , and we get V1 = V / ( 1 + 0.05 K ) 1 ( 2:40 ) With a direction of throw of 1 : 3 only 10 % of the energy is used in the lifting component and twice as large an overcharge is needed . The swelling can thus under ...
... proportion to d / d1 , and we get V1 = V / ( 1 + 0.05 K ) 1 ( 2:40 ) With a direction of throw of 1 : 3 only 10 % of the energy is used in the lifting component and twice as large an overcharge is needed . The swelling can thus under ...
Halaman 308
... proportion 4 : 5 and the V - values in- creased in proportion 5 : 4 the burden is twice as big as the spacing ( EV- value unchanged ) . The cracks from one hole to another can then in the case of simultaneous ignition be expected to be ...
... proportion 4 : 5 and the V - values in- creased in proportion 5 : 4 the burden is twice as big as the spacing ( EV- value unchanged ) . The cracks from one hole to another can then in the case of simultaneous ignition be expected to be ...
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