11. In cut and fill mining, what is typically used for backfilling?
12. Which heading direction is usually driven along the ore body?
13. What is the term for a vertical opening between levels used for ore movement?
14. Which stoping method uses drilling and blasting from sublevels?
15. Which of the following increases the risk of rockbursts?
16. What is the main function of a hoist in a vertical shaft?
17. What is typically installed in raises to allow safe climbing?
18. Which mining method is most compatible with automation and remote operation?
19. What is the purpose of scaling in underground mining?
20. What determines the choice between shaft and ramp access?
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