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

Table 9

Quality ranks of support form and quantitative scores.

Name	Quantitative data and description
Supporting strength (MPa)	<0.1	0.1∼0.2	0.2∼0.3	0.3∼0.5	>0.5
Affecting degree	Small	Relatively small	Medium	Relatively large	Large
Scores	2	4	6	8	10