The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 48
... Throw The throw , which affects the main part of the rock , increases with an increased charge . In addition to this stones or minor parts of the rock may be expected to be thrown 5-10 times as far and in unfavorable circumstances still ...
... Throw The throw , which affects the main part of the rock , increases with an increased charge . In addition to this stones or minor parts of the rock may be expected to be thrown 5-10 times as far and in unfavorable circumstances still ...
Halaman 49
... throw = ethrow const . ( q - q1 ) ( 2:34 ) The calculation of the throw must thus be based on that of the limit charge . Fig . 2 : 9 shows the throw of an instantaneous round with 0.21 kg / m3 excess charge . In fig . 2:10 throw paths ...
... throw = ethrow const . ( q - q1 ) ( 2:34 ) The calculation of the throw must thus be based on that of the limit charge . Fig . 2 : 9 shows the throw of an instantaneous round with 0.21 kg / m3 excess charge . In fig . 2:10 throw paths ...
Halaman 50
... throw , which is evident from the straight lines that have been inserted for the two groups " Instantaneous rounds ... throw energy if 100-16 % of the total power of the explosive should be converted into throw . The comparison shows ...
... throw , which is evident from the straight lines that have been inserted for the two groups " Instantaneous rounds ... throw energy if 100-16 % of the total power of the explosive should be converted into throw . The comparison shows ...
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