The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
Dari dalam buku
Hasil 1-3 dari 92
Halaman 44
... holes can be increased by 10-15 % each , compared with normal rock . 2.8 . Diameter of drill holes , degree of packing The diameter of the hole does not in itself exercise any influence on the quantity of the charge required for ...
... holes can be increased by 10-15 % each , compared with normal rock . 2.8 . Diameter of drill holes , degree of packing The diameter of the hole does not in itself exercise any influence on the quantity of the charge required for ...
Halaman 88
... drill hole and cartridge . If this is made too small there will be the risk of the cartridges sticking when they are being pushed into the hole . In holes drilled with chisel bits the cartridge diameter should be 5–6 mm less than the ...
... drill hole and cartridge . If this is made too small there will be the risk of the cartridges sticking when they are being pushed into the hole . In holes drilled with chisel bits the cartridge diameter should be 5–6 mm less than the ...
Halaman 164
... hole pattern and a minor con- centration of charge extending to the top of ... drill the holes farther below the bottom than is otherwise recommended . If ... drill hole diameter ( given in table 3 : 1 ) . The bottom charge that can be ...
... hole pattern and a minor con- centration of charge extending to the top of ... drill the holes farther below the bottom than is otherwise recommended . If ... drill hole diameter ( given in table 3 : 1 ) . The bottom charge that can be ...
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