Method for determining mine roof competency

Details Method for determining mine roof competency Method for determining mine roof competency

1985-12-06

1987-08-18

Levy, Stewart J.

Measuring and testing

With fluid pressure

Porosity or permeability

73 407, G01N 1508, G01N 1908

Patent

active

046868496

ABSTRACT:
Mine roof competency is determined by injecting a pressurized gas into a borehole drilled in the roof of the mine and measuring the rate of pressure loss. A high rate of pressure loss is indicative of a dangerous mine roof. A tracer gas may also be injected into the borehole to determine the extent of cracks in the roof if a dangerous condition has been determined.

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