GATE MN · 2019 · MN
Question 48: Ground Control
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Question 48
MNNAT2 marksNeeds review
In a bord and pillar panel, 6 square pillars are developed as shown in the figure below. The depth of the seam is 300 m and the average unit weight of overburden rock is 25 kN/m
. If the pillar strength is 15 MPa, the safety factor of the shaded pillar zone (round off to two decimal places) is 
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2019MN
GATE MN 2019 · Paper 1
Mining Engineering · Original paper archive
- Section
- Mining Engineering
- Question type
- Numerical answer (NAT)
- Marks
- 2 marks
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