GATE MN · 2022 · MN
Question 50: Ground Control
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Question 50
MNNAT2 marksNeeds review
The extraction ratio during development of a bord and pillar panel is 0.15 in a flat coal seam. The panel is further extracted by widening the galleries, and the extraction ratio changes to 0.25. The percentage change in pillar stress, considering tributary area method, is ______. (round off to two decimal places)
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2022MN
GATE MN 2022 · Paper 1
Mining Engineering · Original paper archive
- Section
- Mining Engineering
- Question type
- Numerical answer (NAT)
- Marks
- 2 marks
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