Advances in Civil Engineering / 2019 / Article / Tab 2

Research Article

Influences of Water Vapor on Roof Fall Accidents in Selected Underground Coal Mines in Malawi

Table 2

Coefficients in equation (3) for three types of rocks.

RockConstants
AT (MPa)BT (–)

Mchenga arkose sandstone3.440.62
Mchenga fine-grained sandstone5.500.71
Kimachi sandstone5.420.55