Overburden Deformation Rule in Super High Seam Fully Mechanized Caving Mining of Thick Unconsolidated Stratum

Table 5

Related data of working resistance of hydraulic supports (in the middle part of working face).

Month	Number of hydraulic support	Pressure step (m)	Face advanced distance (m/d)	Dynamic load factor
1	70#, 77#	15.50	6.4	1.50
2	70#, 77#	14.50	6.4	1.46
3	70#, 77#	5.50	6.2	1.38
4	70#, 77#	8.60	5.6	1.42
5	63#, 70#	14.37	8.6	1.50
6	63#, 77#	5.50	8.5	1.45
7	63#, 70#	6.80	8.6	1.50
8	63#, 70#	6.90	8.5	1.52