Tunnel Engineering

What is the correct sequence of the following events of construction of a shaft in rock?
1.Drilling and blasting
2.Timbering
3.Pumping
4.Mucking
Select the correct answer using the codes given below Codes:

  • A. 1, 2, 3, 4
  • B. 1, 4, 2, 3
  • C. 2, 1, 4, 3
  • D. 2, 4, 1, 3
Answer: Option B.
Explanation: 

No answer description available for this question.

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