In the Drill and Blast method of tunnel construction, the term 'Mucking' refers to
- AThe process of drilling holes for explosives.
- BThe removal of excavated rock and debris from the tunnel face.Correct
- CThe application of shotcrete to the tunnel walls.
- DThe installation of ventilation pipes.
Solution
Concept
Mucking in Tunneling Construction
Formula
N/A
Step-by-step solution
1. Understand the tunneling term "Mucking" used in drill and blast operations. 2. Recall that mucking refers to the removal of broken rock and debris produced after blasting. 3. Select Option B as the correct answer.
Explanation
Mucking refers to the process of clearing and removing all the broken rock, soil, and debris (called muck) created after blasting or drilling in a tunnel, clearing the space so work can safely continue.
Shortcut
To easily remember the meaning of "Mucking" in tunneling construction, use the simple association rule: "Muck = Mud & Muck Out": - Muck = Messy Debris: "Muck" represents the broken rock, dirt, and waste generated after a blast. - Mucking = Moving out: "Mucking" is the process of Clearing & Removing that waste so construction can continue.
Common mistake
A common mistake is selecting option A by confusing 'mucking' with the initial drilling or blasting phase. Students often mistake the term for the process of making holes or preparing explosives, whereas 'mucking' specifically refers to clearing and removing the excavated muck (broken rock and debris) after blasting. Another frequent error is selecting option C by confusing mucking with shotcreting, which is used for primary tunnel support.
Correct answer: B) The removal of excavated rock and debris from the tunnel face.