Improvement on the Key Element of Flexible U-Shaped Steel Support and Its Field Applications

Table 1

Loading parameters of experimental system.

Serial number of hydraulic cylinder		Lateral pressure coefficient of 1/3		Lateral pressure coefficient of 3		Right-side partial load
		Load (kN)	Loading rate (kN/min)	Load (kN)	Loading rate (kN/min)	Load (kN)	Loading rate (kN/min)
1	Leg	50	1	150	3	300	6
2		50	1	150	3	300	6
3	Shoulder	50	1	150	3	0	0
4		50	1	150	3	0	0
6	Arch	150	3	50	1	150	3
7		150	3	50	1	150	3
8		150	3	50	1	150	3
9		150	3	50	1	150	3
11	Shoulder	50	1	150	3	150	3
12		50	1	150	3	150	3
13	Leg	50	1	150	3	150	3
14		50	1	150	3	150	3