Air-decking principle and its applications in production and presplit blasting

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Mots clés : Air-decking;Presplit blasting;VOD (velocity of detonation)
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Sommaire: Transmission of vibration to the operator from percussive vibrating tools is increasingly of concern in industrial and mining applications. Prolonged exposure to high levels of vibration transmitted via the hand causes disorders known as hand-arm vibration syndrome (HAVS). The vascular component of HAVS is called vibration white finger (VWF) and has a debilitating effect on the hand. Vibration at frequencies below 1250 Hz, a tight hand-grip force and cold environments are reported to increase...
Publication: CIM Bulletin
Auteur(s): K. Prajapati
Mots clés: Vibration, Hand-arm vibration syndrome (HAVS), Vibration white finger (VWF), Vibrating tools.
Numéro: 1047
Volume: 94
Année: 2001
Texte
Sommaire: To minimize ore dilution induced by blast movement in surface mines, it is necessary to quantify such movement. This will enable more accurate location of the grade boundaries beneath the surface of a blasted rock pile before excavation. A method has been developed and tested to accurately measure the direction and magnitude of subsurface blast movement. This technique uses a cesium vapour gradiometer and a real-time, differentially corrected GPS system to locate pre- and post-blast position...
Publication: CIM Bulletin
Auteur(s): G.W. Harris, P. Mousset-Jones, J. Daemen
Mots clés: Ore dilution, Blast movement, GPS (Global Positioning System), Field magnetics, Vertical gradient.
Numéro: 1047
Volume: 94
Année: 2001
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