The most common system of stope extraction is to maintain as . . . . . . . .
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In shrinkage stoping the inclination of stope wall should be . . . . . . . .
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Extraction of small sized, irregularly unsystamatic underground working called
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For a successful VCR stoping, which of the following is appropriate.
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Capacity of slusher is . . . . . . . . tph.
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The raise boring consists essentially of drilling a pilot hole of diameter . . . . . . . .
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The main advantage of drop raising is that number of workers in the lower level are . . . . . . . . except the operator of LHD.
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A system of vertical or nearly vertical openings for transfering ore from a stope to a single delivery point.
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In this method needs heavy supports comparative than other methods and also supporting costly.
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The method used for mining narrow veins or pay streaks, where ore occurs as a distinct band, can be separated easily from wall rocks, mining known as . . . . . . . .
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The first or lowest slice often referred as . . . . . . . .
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Costliest stoping method is . . . . . . . .
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The most precise and fast collection of samples, the method is . . . . . . . . in u/g.
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In this mining method, in which masses, panels or block of ore are under cut to induce caving, permitting the broken ore to be drawn off below.
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The foot wall shaft cross cuts are drawn to intersect the ore body and raises are made to connect the cross cuts; in under ground. The top of the raises are widened, the method of extraction is . . . . . . . .
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The deposit of iron ore in India is about . . . . . . . . % of the world.
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Excess pore pressure in backfill material is a cut and fill stope leads to . . . . . . . .
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Ore grade from which revenue from the recoverable reserves exactly equals to the cost of mining, treatment and marketing is called . . . . . . . .
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Raise driving by use of jora hoist to drive mechanised raising upto . . . . . . . . m long raises.
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The ring drilling and blasting employed in this stoping.
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