Q461
Open questionLimiting depth of bord and pillar method
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Mining Engineering · all questionsCoal Mining
Coal Mining
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Q462
Open questionTo stop stowing which is done to avoid the jamming of the pipe?
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Q463
Open questionSimultaneous sinking and supporting possible in this method of lining
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Q464
Open questionThe shape of hangers used in temporary lining are
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Q465
Open questionWhich type of drill bit is suitable for very hard rock
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Q466
Open questionThe main fall on L/W face generally occured after the face advance of . . . . . . . . m.
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Q467
Open questionIn level mining, a level road way along the floor of the seam and extending upto the boundary of the mine called . . . . . . . .
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Q468
Open questionP5 explosive should have more than . . . . . . . .% of NaCl.
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Q469
Open questionHand packing useful upto maximum gradient.
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Q470
Open questionThe method of sinking through loose deposit of sand upto 60 m
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Q471
Open questionSplitting may start from . . . . . . . . middle points of pillar simultaneously.
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Q472
Open questionStrata through which shaft has to be sunk may be divided into
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Q473
Open questionDiamond drill bit is rotated at a speed of nearly
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Q474
Open questionThe pressure falling on drill bit can be controlled during drilling by
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Q475
Open questionThe methods used deflection of bore holes are
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Q476
Open questionThe discharge velocity of sand in pneumatic stowing in m/s . . . . . . . .
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Q477
Open questionManual drilling is possible upto maximum
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Q478
Open questionFor deep hole, downward holes, for blasting in quaries, the type of drilling preferred are
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Q479
Open questionPocket wheel stowing machines also called
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Q480
Open questionLump breaker installed near belt conveyor to reduced the coal to . . . . . . . . size.
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