Q101
Open questionThe face advances towards rise side is possible in longwall, if seam inclination less than.
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Coal Mining
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Q102
Open questionNumber of persons required to operate a electric drill machine
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Q103
Open questionIn horizon mining, the vertical distance between horizon is
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Q104
Open questionCuttings from bottom of holes removed by circulating fluid under pressure called
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Q105
Open questionDiscontinuity which separate the sid and sima layer of crust is known
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Q106
Open questionUpto what gradient the bord and pillar mining adopted without special arrangements.
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Q107
Open questionThe departure of bore hole, whether vertical (or) inclined, from its course called
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Q108
Open questionWhen the stratas are well stratified sand stone or shales, the local fall will take place within . . . . . . . . hours, after withdrawal of supports.
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Q109
Open questionThe operation of tracing of broken and lost parts in the hole and withdrawn to the surface
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Q110
Open questionThe DERDS cut coal is thrown on the AFC by
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Q111
Open questionThe percentage of recovery in BG method.
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Q112
Open questionThe walls by which roof over the goaf partially/compleated supported by
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Q113
Open questionBentonite chemical is used for
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Q114
Open questionDriving motor HP in thrower conveyar in mechanical stowing.
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Q115
Open questionThe distance between one room to another room, leaving a small rib in . . . . . . . . meters in room and pillar mining.
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Q116
Open questionCrows foot used for removing
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Q117
Open questionIf the size of the pillar is 30 m × 30 m; the number of stooks done in pillar is
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Q118
Open questionRotory drilling methods are
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Q119
Open questionFor a seam inclined, 60° steep, 2 m thin the method of goaf control employed.
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Q120
Open questionThe length of rooms in room and pillar method.
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