The following operations are generally employed for tunnelling in hard rock. 1. Removing ground water, 2. Loading holes and firing the explosive3. Setting up and drilling4. Grouting and lining5. Removing muck6. Ventilation and removing explosion dustThe correct sequence is

Comments and Answers (2)

Deeksha

Deeksha

anyone have any solutions

Binod

Binod

please give any soltion

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