GATE MN · 2024 · MN
Question 61: Geomechanics
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Question 61
MNNAT2 marksNeeds review
In an opencast coal mine, blast vibrations are measured at two locations, A and B simultaneously for a maximum charge per delay (Q) of 100 kg is given.
Location | Distance from the blast face, D (m) | PPV (mm/s) |
|---|---|---|
A | 100 | 112.5 |
B | 300 | 20.3 |
Assume the relation
where, K and
are site constants. The PPV in mm/s, at a distance of 200 m from the blast face, is _____. (round off up to 2 decimals)Log in to check the answer
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2024MN
GATE MN 2024 · Paper 1
Mining Engineering · Original paper archive
- Section
- Mining Engineering
- Question type
- Numerical answer (NAT)
- Marks
- 2 marks
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