Advances in Civil Engineering / 2019 / Article / Tab 1

Research Article

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

Table 1

Coefficients to represent density as a function of relative humidity.

Ad (kg/m3)Bd (kg/m3)

Mchenga arkose sandstone246546
Mchenga fine-grained sandstone201367
Kimachi sandstone2011131