Floor Disturbance and Failure Characteristics of Super-Large Mining Height Working Face

Table 2

Depth of the floor failure zone of the working face calculated according to statistical formulas.

Source of formula	Formula	Depth of floor failure zone (m)
Li and Mi (1988) [1]		29.36
Wang et al. (2000) [29]		25.1
Zhang et al. (1997) [30]		24.45
“Lower three” procedure		26.35