Mining Engineering > GATE 2020 > Underground Coal Mining
A mine gallery is supported by regularly placed roof bolts of 100 kN allowable pull force per bolt, as shown below. Assuming unit weight of the immediate roof is 25 kN/m3, the factor of safety of the support system is _________. (round off to 2 decimal places).

Correct : 2.10

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mine gallery support roof bolts support GATE Mining Engineering 2020 mining engineering gate factor of safety support roof bolts force immediate roof weight GATE 2020 question 52 mining engineering engineering

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