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Secrets Beneath Earth: Tunnel Engineering
Explore the hidden world of underground tunnel systems with this crossword featuring key terms and concepts related to subterranean construction and design.
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Across
  • 1. System to circulate fresh air in tunnels
  • 2. Famous video game inspired by underground excavation
  • 7. Protective device used during tunnel excavation
  • 10. Emergency exit route for tunnel safety
  • 12. Structural reinforcement inside tunnels
  • 14. Process of drilling tunnels through rock or soil
Down
  • 3. Tunnel construction method using excavation then covering
  • 4. Machine used to dig through earth
  • 5. Device used to secure tunnel lining
  • 6. Preventing water ingress in tunnel walls
  • 8. Earth material that tunnels pass through
  • 9. System to remove water from tunnels
  • 11. Relating to earth vibrations affecting tunnel stability
  • 13. Urban underground train network
  • 15. Material applied inside tunnel walls for support
  • 16. Passageway constructed below ground

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