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81
The limit for drivage of compartmental raising is . . . . . . . .
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Answer & Solution
Answer: Option B
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82
Main purpose of wide and stall method is . . . . . . . .
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Answer: Option C
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83
Which of the following method employ horizontal opening.
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Answer: Option C
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84
The loading in blast hole stoping by . . . . . . . .
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Answer: Option C
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85
The support in top slicing is . . . . . . . .
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Answer: Option C
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86
The method of stoping for high grade ore with walls of the ore body and back of the stope are so weak, which do not stand without support even for a week time is . . . . . . . .
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Answer: Option C
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87
In this method the supporting need naturally supported.
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Answer: Option A
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88
Upward drivage of shaft is carried out for a distance upto . . . . . . . . m in metal mine.
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Answer: Option A
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89
The most dangerous form of mining for the miners is . . . . . . . .
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Answer: Option A
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90
The pillar which is left for support of sides during extraction called . . . . . . . .
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Answer & Solution
Answer: Option A
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