Q134
Which parameter most influences the spacing of ground support?
A.
Tunnel length
B.
Ventilation type
C.
Rock mass quality
AnswerD.
Support brand
Answer: Option C
Solution
Answer: Option C
Solution:
Ground support spacing is based on geotechnical stability.The correct answer is: Rock mass qualityMeasured using RMR, Q-system, etc.Better rock needs less support.