Method and apparatus for fracturation detection

Details Method and apparatus for fracturation detection Method and apparatus for fracturation detection

1983-03-04

1985-07-30

Goldberg, Gerald

Measuring and testing

With fluid pressure

Porosity or permeability

73 37, 73 40, G01N 1508, G01N 1908

Patent

active

045314039

ABSTRACT:
A method and apparatus for detecting cracks or other separations deep inside massive rock-like structures and assessing the integrity and safety of mine roofs and the like, wherein at least one borehole is drilled into the rock and a negative fluid pressure is applied thereto. The permeability of the rock at selected intervals along the borehole is measured and thereby the presence or absence of fractures in the rock is detected. The extension of the fracture to an adjoining hole may be determined by a pressure respond test in the adjoining hole.

REFERENCES:
patent: 4104906 (1978-08-01), Oertle
patent: 4135386 (1979-01-01), Peterson et al.
patent: 4145915 (1979-03-01), Oertle et al.

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