41. What is "overbreak" in development blasting?
42. Which support system uses wire mesh and shotcrete together?
43. In block caving, what triggers the caving process?
44. What does RMR stand for in rock mechanics?
45. Which of the following is an economic advantage of room and pillar mining?
46. Which term describes the process of cleaning and leveling a stope floor after blasting?
47. What is the function of a refuge bay in an underground mine?
48. Which mining method is least suitable for soft and unstable ground?
49. Which underground opening is driven perpendicular to the ore body to reach it?
50. What is the primary benefit of mechanized raise mining?
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