Which one of the following is considered to be an advantage of the heading and benching method of tunes construction ?« Back to Previous Page
A. It is suitable for construction in unstable rocks
B. In this method, it is easy to install timber support
C. Tunnelling can be continous and the work can be expedited
D. In case of excessive water, it is easy to take corrective steps
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C. Tunnelling can be continous and the work can be expedited |
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