81. Which of the following is a key advantage of cut-and-fill mining?
82. What is the main function of a grizzly in an underground mine?
83. Which of the following methods is best for extracting ore from a horizontal, thin vein?
84. What is the purpose of "timber sets" in underground mining?
85. Which term refers to the initial drift or tunnel created to access an ore body?
86. Which support type applies compressive force to resist rock movement?
87. Which method is best for mining ore bodies that dip at shallow angles?
88. The process of enlarging a shaft or tunnel is called:
89. Which method uses gravity flow of ore and caved waste rock?
90. What is the main challenge with room and pillar mining?
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