Discussion :: Tunnelling - Section 1 (Q.No.3)
In case of drift method of tunnelling, the drift may be excavated at
Answer: Option E
No answer description available for this question.
|Parth Trivedi said: (Jun 14, 2018)|
|Drift method is concerned with expansion of hole by blasting, so hole may be at top, bottom, centre or at sides of it.|
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