The Stability Factors’ Sensitivity Analysis of Key Rock B and Its Engineering Application of Gob-Side Entry Driving in Fully-Mechanized Caving Faces

Table 2

Orthogonal experimental scheme and simulation results.

Serial number	Factors
	Main roof height	Main roof hardness	Length of the key rock block B	Fracture location	Total deformation of surrounding rocks (mm)	Rib-to-rib relative deformation (mm)	Roof-to-floor relative deformation (mm)
1	1	1	3	2	479.7	288.97	190.73
2	2	1	1	1	880.29	515.70	364.59
3	3	1	2	3	775.7	447.07	328.63
4	1	2	2	1	455.28	282.25	173.03
5	2	2	3	3	755.02	445.23	309.79
6	3	2	1	2	849.82	482.32	367.50
7	1	3	1	3	413.1	259.00	154.10
8	2	3	2	2	893.39	388.55	504.84
9	3	3	3	1	741.64	440.42	301.22
Average value 1	449.36	711.90	658.79	740.97	Total deformation of surrounding rocks
Average value 2	842.90	686.71	742.99	692.40
Average value 3	789.05	682.71	679.54	647.94
Range	393.54	29.19	84.20	93.03
Average value 1	276.74	417.25	391.54	386.61	Rib-to-rib relative deformation
Average value 2	449.83	403.27	395.50	412.79
Average value 3	456.60	362.66	396.13	383.77
Range	173.09	54.59	3.96	29.02
Average value 1	172.62	294.65	267.25	354.36	Roof-to-floor relative deformation
Average value 2	393.07	283.44	347.49	279.61
Average value 3	332.45	320.05	283.41	264.17
Range	220.45	25.40	80.24	90.18