GATE MN · 2025 · MN
Question 65: Mining Methods
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Question 65
MNNAT2 marksNeeds review
A double ended range drum (DERD) shearer uni-directionally cuts coal in a longwall panel having the following details
Shearer drum diameter = 1.4 m
Panel dimension = 1200 m × 200 m × 2.4 m
Web depth = 0.6 m
Average cutting speed = 5 m/minute
Average retreating speed = 10 m/minute
Average operational delay between cuts is 2 hour. There are two production shifts, each of 8 hour duration. The number of days required for complete extraction of the panel is ____ (in integer)
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2025MN
GATE MN 2025 · Paper 1
Mining Engineering · Original paper archive
- Section
- Mining Engineering
- Question type
- Numerical answer (NAT)
- Marks
- 2 marks
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