The Modern Technique of Rock BlastingWiley, 1978 - 438 halaman |
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Halaman 14
... ground vibrations 9.2 . Reading the vibrograms • 9.3 . Character of the ground vibrations 9.4 . Damage a . Compression - elongation b . Shearing . c . Bending . d . Local effects e . Vibration energy f . Subjective estimate . g ...
... ground vibrations 9.2 . Reading the vibrograms • 9.3 . Character of the ground vibrations 9.4 . Damage a . Compression - elongation b . Shearing . c . Bending . d . Local effects e . Vibration energy f . Subjective estimate . g ...
Halaman 295
... ground ? b ) Calculate the relation between the suspended mass and the unsuspended one if vibrations with up to a 8 g are to be accurately recorded . = 2. Calculate the amplitude and frequency in that part of the vibrogram in fig . 9 ...
... ground ? b ) Calculate the relation between the suspended mass and the unsuspended one if vibrations with up to a 8 g are to be accurately recorded . = 2. Calculate the amplitude and frequency in that part of the vibrogram in fig . 9 ...
Halaman 347
... Ground vibrations and water shock waves General bases for dealing with problems in connection with the ground vibrations are given in Chapter 9. The characterisation of underwater rounds as opposed to ordinary blasting is , first , the ...
... Ground vibrations and water shock waves General bases for dealing with problems in connection with the ground vibrations are given in Chapter 9. The characterisation of underwater rounds as opposed to ordinary blasting is , first , the ...
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