Table 1 Range of experimental variables considered in geyser experiments created by entrapped air release.

From: Experimental investigation on the hazard of geyser created by an entrapped air release in baffle-drop shafts

Variable

Range considered

Dimensionless range

Water depth

hw = 0.20, 0.30, 0.40, and 0.50 m

hw* = hw/H = 0.167, 0.250, 0.333, and 0.417

Air pressure

pi = 0.050, 0.100, 0.150, 0.200, 0.250, 0.300, 0.350, and 0.400 MPa

pi* = pi/ps = 0.500, 1.000, 1.500, 2.000, 2.500, 3.000, 3.500, and 4.000

Air volume

Vi = 0.98, 1.96, and 2.94 × 10–3 m3

Vi* = nVi/(H·D2) = 0.026, 0.052, and 0.078

Connected region area

Sc = 0, 0.005, 0.010, and 0.015 m2

Sc* = 4Sc/(πD2) = 0.000, 0.159, 0.318, and 0.478

  1. Note: The standard atmospheric pressure (ps) is 101.325 kPa; the number of air chambers (n) is 1, 2, and 3.
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