The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
Dari dalam buku
Hasil 1-3 dari 82
Halaman 78
... Practical Max . burden burden Minimum V1 charge / hole H d V Q ft m mm m m ft kg Slope 3 : 1 2 : 1 0.3 1 0.73 40 0.67 0.6 2.0 0.11 0.45 0.90 40 0.78 0.7 2.3 0.19 0.6 2 1.05 ... Practical burden ( V1 ) 78 Some tables for practical application.
... Practical Max . burden burden Minimum V1 charge / hole H d V Q ft m mm m m ft kg Slope 3 : 1 2 : 1 0.3 1 0.73 40 0.67 0.6 2.0 0.11 0.45 0.90 40 0.78 0.7 2.3 0.19 0.6 2 1.05 ... Practical burden ( V1 ) 78 Some tables for practical application.
Halaman 79
U. Langefors, Björn Kihlström. TABLE 3 : 6 . Practical burden ( V1 ) * in multiple - row bench blasting . Diameter of the drill bit d = 44 , 50 , 57 , 63 , 75 , 100 mm . Slope of the holes 3 : 1 — 2 : 1 . E = 1.25 V. m Bench height K ...
U. Langefors, Björn Kihlström. TABLE 3 : 6 . Practical burden ( V1 ) * in multiple - row bench blasting . Diameter of the drill bit d = 44 , 50 , 57 , 63 , 75 , 100 mm . Slope of the holes 3 : 1 — 2 : 1 . E = 1.25 V. m Bench height K ...
Halaman 86
... practical burden for a round with only a few rows is between these two values . In the practical case the bench height is often given . Then the relative influence of errors in the drilling is reduced by the bigger diameter . 3.5 ...
... practical burden for a round with only a few rows is between these two values . In the practical case the bench height is often given . Then the relative influence of errors in the drilling is reduced by the bigger diameter . 3.5 ...
Isi
Symbols used | 16 |
Calculation of the charge General part | 28 |
Calculation of the charge Practical application | 69 |
Hak Cipta | |
14 bagian lainnya tidak diperlihatkan
Edisi yang lain - Lihat semua
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