Dynamic Evolution Law of Overburden Rock in Shallow-Buried Super-High Fully Mechanized Working Face and Determination of Support Strength

Table 3

12401 working surface cycle to pressure statistics.

Working face weighting name	Working face weighting step (m)	Advancing distance of working face (m)	Working face weighting name	Working face weighting ste (m)	Advancing distance of working face (m)
Initial weighting	54.00	54.00	The 9th time	30.00	261.75
The 1st time	24.75	78.75	The 10th time	21.75	283.50
The 2nd time	17.25	96.00	The 11th time	20.25	303.75
The 3rd time	23.25	119.25	The 12th time	19.50	323.25
The 4th time	16.50	135.75	The 13th time	12.75	336.00
The 5th time	27.00	162.75	The 14th time	21.00	357.00
The 6th time	21.75	184.50	The 15th time	21.75	378.75
The 7th time	23.70	208.20	The 16th time	26.25	405.00
The 8th time	23.55	231.75	Average periodic weighting step	22.00	—