192 resultados para Explosives.
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"December 1953".
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Mode of access: Internet.
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Mode of access: Internet.
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Mode of access: Internet.
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Cover title.
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"A short bibliography of explosives literature for blasters": p. 185-187.
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Includes bibliographical references (185-187)
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"September 1984."
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"September 1984."
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"September 1984."
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"27 December 1988."
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At head of title: Department of the Interior, Franklin K. Lane, secretary. Bureau of Mines, Van. H. Manning, director.
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Dated on cover: 1916.
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Cover dated 1916.
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Commercial explosives behave non-ideally in rock blasting. A direct and convenient measure of non-ideality is the detonation velocity. In this study, an alternative model fitted to experimental unconfined detonation velocity data is proposed and the effect of confinement on the detonation velocity is modelled. Unconfined data of several explosives showing various levels of nonideality were successfully modelled. The effect of confinement on detonation velocity was modelled empirically based on field detonation velocity measurements. Confined detonation velocity is a function of the ideal detonation velocity, unconfined detonation velocity at a given blasthole diameter and rock stiffness. For a given explosive and charge diameter, as confinement increases detonation velocity increases. The confinement model is implemented in a simple engineering based non-ideal detonation model. A number of simulations are carried out and analysed to predict the explosive performance parameters for the adopted blasting conditions.