Title: Mine roof and wall inspection apparatus and method

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.

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Inventors: Tarpley, Jr., William B. (West Chester, PA, US)

Application Number: 845178
Filing Date: 1977-10-25
Publication_date: 1979-04-24
Assignee: Energy and Minerals Research Co. (Kennett Square, PA)
Primary Class(es): 73/594 73/644, 181/108, 181/401
Other Classes:
US Patent Ref:

2280226	Apr, 1942	Firestone	73/627.
2549076	Apr, 1951	Gallagher et al.	73/594.
2728405	Dec, 1955	Bryant	73/598.
2891178	Jun, 1959	Elmore	310/26.
3552191	Jan, 1971	Heseding	73/624.
3616682	Nov, 1971	Golis et al.	73/642.
3741003	Jun, 1973	Gunkel	73/644.
3961307	Jun, 1976	Hochheimer et al.	181/104.

Other Refs:
Primary Examiner: Kreitman, Stephen A.
Assistant Examiner:
Attorney: Seidel, Gonda, Goldhammer & Panitch