A Novel Model of the Ideal Point Method Coupled with Objective and Subjective Weighting Method for Evaluation of Surrounding Rock Stability

Table 1

Classification standard of surrounding rock stability.

Stability class	/%			/(L·min^−1)	/°
I (very good)	250~300	0.75~1.0	9~10	0~5	80~90
II (good)	100~250	0.55~0.75	7~9	5~10	70~80
III (fair)	50~100	0.35~0.55	4~7	10~25	30~70
IV (poor)	25~50	0.15~0.35	2~4	25~125	10~30
V (very poor)	1~25	0~0.15	0~2	125~250	0~10