The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 60
... ( Diagram 2 : 2 ) For a slope 2 : 1 , a rock factor c = 0.4 ( normal value ) and various concentra- tions of the charge the Diagram 2 : 2 shows how the maximum burden in- creases with the bench height up to K = 1.8 V. For greater heights ...
... ( Diagram 2 : 2 ) For a slope 2 : 1 , a rock factor c = 0.4 ( normal value ) and various concentra- tions of the charge the Diagram 2 : 2 shows how the maximum burden in- creases with the bench height up to K = 1.8 V. For greater heights ...
Halaman 61
... Diagram 2 : 1 read in inverse direction from the burden ( right - hand horizontal scale ) to the con- centration of ... Diagram 2 : 1 it is found that this corresponds to d = 42 mm with an ordinary value for the degree of packing , P ...
... Diagram 2 : 1 read in inverse direction from the burden ( right - hand horizontal scale ) to the con- centration of ... Diagram 2 : 1 it is found that this corresponds to d = 42 mm with an ordinary value for the degree of packing , P ...
Halaman 62
... diagram shows . The diagram is read starting from the actual value for the burden Vat the bottom of the hole and passing vertically up to the curve for the rock factor c , e.g. c = 0.4 , and then turning to the left in the case of ...
... diagram shows . The diagram is read starting from the actual value for the burden Vat the bottom of the hole and passing vertically up to the curve for the rock factor c , e.g. c = 0.4 , and then turning to the left in the case of ...
Isi
Symbols used | 16 |
Calculation of the charge General part | 28 |
6 | 38 |
Hak Cipta | |
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Istilah dan frasa umum
advance per round Ammonit amplitude AN-oil angle of breakage applies bench blasting bench height blasting gelatine bottom charge burn cuts calculated cartridges cm/m column charge concentration of charge connection contour corresponding cracks cylinder cuts damage degree of packing deviation diagram distance dm³ drill hole drilled depth drilling pattern dynamite effect empty hole energy example explosive 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/ft less loader lower maximum burden meter mm/s multiple-row rounds Nabit Nitroglycerin Nonel number of holes obtained ordinary delay overcharge parallel hole cuts pneumatic possible presplitting pressure reduced risk rock blasting rock factor row of holes shock wave slope smooth blasting specific charge sq.ft stoping Sweden Täby throw tion tunnel underwater blasting V₁ vertical vibration velocity vibrogram weight strength width