Vulnerability Analysis of Soft Caving Tunnel Support System and Surrounding Rock Optimal Control Technology Research

Table 4

Quality ranks of tunnel section size and quantitative scores.

Name	Quantitative data and description
The size of tunnel’s cross-section (m^2)	<10	10≤𝑆<12	12≤𝑆<14	14≤𝑆≤16	>16
Affecting ranks	Small	Relatively small	Medium	Relatively large	Large
Scores	2	4	6	8	10