A 2yd dragline is being used to excavate a canal in common e

A 2-yd dragline is being used to excavate a canal in common earth. The average swing angle is 70°, the average depth of cut is 8.9 ft and job efficiency is 50 m/hr. Estimate the dragline\'s hourly production in loose measure.

Solution

Solution:

Ideal Output = 230 BCY/hr or 176 BCm /hr (Assumed)

Optimum depth = 9.9ft or 3 m (Assumed)

% optimum depth = 8.9/9.9 * 100 = 90 %

Swing - depth factor = 1.06 ( 70 degree swing, 90% optimum depth)   (Assumed)

Jon efficiency = 50/60 = 0.83

Production = ideal output * swing-depth * job efficiency

= 230 * 1.06 * 0.83 = 202 BCY/hr

The assumed values relate to the values mentioned in various Textbooks.

Thanks