example of rock blast volume calculations for pipe distribution network.?

Question

Keen on learing how the contractors work on determining the volume of the rock blasted when laying a section of a pipe in a water distribution network

Answer 1

When we calculate the rock volume, usually there are two ways:

1) Rock "in situ" - for a pipe, we calculate (geometrically) the volume of the trench (L1 +L2)/2 * H = section of trench; multipling for lengt = volume of rock in situ .

2) Rock blasted - I usually use a factor = 1,6 (the relation between volume of natural rock and blsted rock).

Then, a volume of natural rock = 1.000 m³ will became = 1.600 m³ after blasting.

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