Study of Top Coal Partition and Key Delayed-Action Region for Horizontal Sublevel Top Coal Caving in Deeply Inclined Seam

Table 2

Weakening top coal using water injection method and production condition at working face.

Time	Average advance distance (m)	Average advance time (d)	Average daily productivity (T)	Average productivity rate (%)
5.16–6.21	0.0	0.0	1753.0	71.17
6.22–7.31	28.4	10.8	1613.0	78.50
8.1–8.31	15.1	4.5	1900.6	82.10
9.1–9.21	34.8	8.4	2526.1	95.80
9.22–10.12	0.0	0.0	1716.2	72.40