The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 51
... limits the specific charge the charge can therefore in multiple - row blasting be increased without extending the front limit of the round . The " scattering " of small stones seems mainly to be due to their having been torn off by the ...
... limits the specific charge the charge can therefore in multiple - row blasting be increased without extending the front limit of the round . The " scattering " of small stones seems mainly to be due to their having been torn off by the ...
Halaman 55
... limit charge and c = 0.400 kg / m3 when an ordinary ( and minimum ) technical margin is included . With q 。 in g / m3 qo = 0.8Qo / V3 = 320 + 56 / V + 3.2 V ( 2:41 ) The rock excavated by a single drill hole with a bench height equal ...
... limit charge and c = 0.400 kg / m3 when an ordinary ( and minimum ) technical margin is included . With q 。 in g / m3 qo = 0.8Qo / V3 = 320 + 56 / V + 3.2 V ( 2:41 ) The rock excavated by a single drill hole with a bench height equal ...
Halaman 273
... limit for damage is reduced by a certain amount , but the above - mentioned expression for S can be expected to stand in the sense that , for an actual case , a release of the tension by cracks is obtained if v reaches a given value ...
... limit for damage is reduced by a certain amount , but the above - mentioned expression for S can be expected to stand in the sense that , for an actual case , a release of the tension by cracks is obtained if v reaches a given value ...
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