Stability Analysis and Fracture Patterns of Hard Main Roof in Longwall Top Coal Caving with Large Mining Height

Table 5

Comparison of underground pressure in the middle of No. 8105 and 8100 longwall face [27].

Longwall face number		8100	8105
Working resistance during weighting (kN)	Value distribution interval	10000–14000	8000–13000
	Average value	12805.6	10895.7
Periodic weighting interval/m	Value distribution interval	11.48–44.6	9.6–36.6
	Average value	29.4	24.8