61. The front abutment exertsa peak pressure . . . . . . . . meters in advance of the L/W face
62. The water tank have a capacity required for hydraulic stowing . . . . . . . . days requirement of water.
63. Lignite deposits in tertiary rocks of Neyveli is of
64. Seam thickness suitable for plough operation.
65. Stowing pipe range consists of mainly . . . . . . . .
66. The line passing through all the corners of the stook under extraction at a time called
67. By installation of booster punp instowing causes
68. Area of cross section of steel rods are
69. Double tube core barrel helps in
70. Over riding of pillars, premature collapse cover due to presence of
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