81. CMRS designed hydraulic Prop. Have
82. The hydraulic props classified into . . . . . . . . types.
83. Pick odd-man out
84. Vertical compressive forces are proportional to the . . . . . . . . excavation.
85. The pressure rating of triaxial cell is . . . . . . . . maximum confining pressure.
86. The point load index strength index (IS) of rock is, 0.5 Mpa, what is the compressive strength of that rock?
87. Commercial grades fixed by Government of India based an analysis carried out under
88. RMR is predominently used for estimation of rock load and design of the support system for . . . . . . . . in underground mines.
89. Calculate the safe cover, if the seam extracted by stowing on surface occupied by Kacha buildings assume thickness of seam is 2 m.
90. In cross bar support, the side clamps are put in holes of atleast A cm deep. Made in coal pillar side, A is given by
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