Analysis on the Influence Degree of Deformation Control Factors of Deep-Buried Roadway’s Fractured Surrounding Rock Using Orthogonal Design

Table 8

Range analysis of the main control factors.

No.	Control factor				Total deformation (mm)
	Bolt length	Row spacing between bolts	Cable length	Row spacing in U-shaped steel
T1	1 (2.0)	1 (0.6 × 0.6)	1 (5.0)	1 (0.4)	221
T2	1	2 (0.8 × 0.8)	2 (7.0)	2 (0.7)	240
T3	1	3 (1.0 × 1.0)	3 (9.0)	3 (1.0)	287
T4	2 (2.5)	1	2	3	259
T5	2	2	3	1	219
T6	2	3	1	2	231
T7	3 (3.0)	1	3	2	237
T8	3	2	1	3	259
T9	3	3	2	1	222
K1	748	717	711	662
K2	709	718	721	708
K3	718	740	743	805
k1	249.3	239.0	237.0	220.7
k2	236.3	239.3	240.3	236.0
k3	239.3	246.7	247.7	268.3
Rm	13.0	7.7	10.7	47.7