Mine roof and wall inspection apparatus and method

Details Mine roof and wall inspection apparatus and method Mine roof and wall inspection apparatus and method

1977-10-25

1979-04-24

Kreitman, Stephen A.

Measuring and testing

Vibration

By mechanical waves

73644, G01N 2904

Patent

active

041505760

ABSTRACT:
The roof and walls of a mine are inspected for fissures, channels and other geological structure by use of a vibratory energy transmitter and a vibratory energy receiver each of which are forced into contact with the wall or roof by a jack with little or no loss of vibratory energy. The frequency of vibration is between 10 and 100 kilohertz.

REFERENCES:
patent: 2280226 (1942-04-01), Firestone
patent: 2549076 (1951-04-01), Gallagher et al.
patent: 2728405 (1955-12-01), Bryant
patent: 2891178 (1959-06-01), Elmore
patent: 3552191 (1971-01-01), Heseding
patent: 3616682 (1971-11-01), Golis et al.
patent: 3741003 (1973-06-01), Gunkel
patent: 3961307 (1976-06-01), Hochheimer et al.

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