The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 229
... position and ignition sequence for 10 relievers with d = 30 mm around the open- ing if the deviation ( R ) is 0.20 m for 5/6 of all the holes . 6. Indicate in the example above the final position of the holes if they are numbered 5-15 ...
... position and ignition sequence for 10 relievers with d = 30 mm around the open- ing if the deviation ( R ) is 0.20 m for 5/6 of all the holes . 6. Indicate in the example above the final position of the holes if they are numbered 5-15 ...
Halaman 334
... position is indicated for vertical holes and for sloping ones in fig . 11 : 6 . Finally , a plan of the position of the holes at the stipulated bottom is shown for vertical and sloping holes ( fig . 11 : 7 ) according to the profiles of ...
... position is indicated for vertical holes and for sloping ones in fig . 11 : 6 . Finally , a plan of the position of the holes at the stipulated bottom is shown for vertical and sloping holes ( fig . 11 : 7 ) according to the profiles of ...
Halaman 337
... position of the holes in the first row don't exceed 6d the drilling pattern can be left un- changed as the holes are so close to one another that they cooperate , thus compensating for small deviations in the drilling . As an easy ...
... position of the holes in the first row don't exceed 6d the drilling pattern can be left un- changed as the holes are so close to one another that they cooperate , thus compensating for small deviations in the drilling . As an easy ...
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