Q261
Open questionPlatinum deposits are
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Mining Engineering · all questionsMine Supports and Strata Control
Mine Supports and Strata Control
practice.
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320
Questions
14/16
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Q262
Open questionThe percentage of emulsion oil used in hydraulic prop.
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Q263
Open questionIn Indian conditions the angle of draw is always
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Q264
Open questionWhen props and bars are used for supporting the long wall face. In Indian mines, which type of system is used for longwall face.
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Q265
Open question. . . . . . . . axis represents the behavior of the prop under load.
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Q266
Open questionLignite deposite is found in . . . . . . . .
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Q267
Open questionA timber prop is expected to support a roof area of about . . . . . . . . all around.
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Q268
Open questionWhich type of prop is lighter in weight in yeilding props.
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Q269
Open questionGenerally the yeild of the prop plotted in
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Q270
Open questionRelative volume of all props contained in unit volume of rock is measure of its
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Q271
Open questionThe preferred shape of an opening in biaxial stress field.
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Q272
Open questionFor roof stitching the depth of the hole are
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Q273
Open questionThe roof bolts used in mines are
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Q274
Open questionThe anchorage in the suppport of roof stitching is
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Q275
Open questionIn beded rocks, when the beds are in between
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Q276
Open questionWhen roof is tapped with a stick, the dull sound indicates the roof
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Q277
Open questionCompressive strength of coal in t/m2.
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Q278
Open questionThe width of workings from the goaf line to the face called
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Q279
Open questionThe angle between the vertical and find line of break called
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Q280
Open questionISO certification to mine was required after
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