91. The distance between the fixed alignment points of raise should be . . . . . . . .
92. Crown pillar is at . . . . . . . .
93. The core samples from ore and walls is tested low; we impliment the method of mining is . . . . . . . .
94. A vertical method. Similar to slope and pillar mining in the supported class is known as . . . . . . . .
95. If the stope has an inverted stepped appearance commonly called as . . . . . . . .
96. If the stopping take place on one side of the rise winze connection called . . . . . . . .
97. Vertical creater retreat method is a modified verson of . . . . . . . .
98. The method employed, if the ore body is strong, moderately thick, flat dipping.
99. A vertical or inclined opening used for transfering are:
100. The process of under water mining of sand, clay, tin and placer deposits of gold is known as . . . . . . . .
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