Which one of the following statements is not correct with regard to heading and henching method of tunnelling?

Driving of tunnel is done in two portions of its section
Driving the top portion is done in advance of the bottom portion
The holes in head and bench are loaded together with explosive for blasting
Firing of head holes is done just before the bench holes are fired

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Answer: Option 4

Let'

4 views Answered 2022-09-01 13:21

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