Maurice Tutor

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Teaching Since: May 2017
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  • MCS,PHD
    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 11 Oct 2017 My Price 4.00

cost of rock excavation

Estimate the hourly production and unit cost of rock excavation by drilling and blasting. The rock is a limestone having a seismic velocity of 6000 ft/s (1830 m/s). Trial blasting indicates that 3½-in. (8.9-cm) holes drilled in an 8-ft (2.44-m) rectangular pattern will provide the desired fracturing. A hole depth of 20 ft (6.1 m) yields an effective depth of 18 ft (5.5 m). The average drilling rate is estimated to be 70 ft fh (21.4 m/h). A powder factor of 1 Ib/BCY (0.59 kg/BCM) of ANFO will be used.

 

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Maurice Tutor
(5)
Status NEW Posted 11 Oct 2017 11:10 AM My Price 4.00

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