GATE 2024 MN – Question 14

Surface Environment, Mine Ventilation and Underground Hazards · Underground Hazards · 1 mark · Multiple choice

A mine records 2 fatalities and 3 serious injuries in a year with 1100 average daily employees and 300 working days. Find the DGMS severity index used by the source.

12.32
25.58
31.21
34.63

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Show answer and explanation

Correct answer: (C) 31.21

Explanation

Use the weighted index SI=(50F+S)×100000/manshifts. Total manshifts=1100×300=330000 and the weighted injury count=50×2+3=103. Hence SI=103×100000/330000=31.2121, or 31.21, C. This particular index is distinct from ordinary injury frequency or lost-day severity rates.

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