Accession Number:

AD0736692

Title:

Seismic Determination of Geological Discontinuities Ahead of Rapid Excavation

Descriptive Note:

Semiannual technical rept 30 Apr-31 Oct 1971

Corporate Author:

BENDIX RESEARCH LABS SOUTHFIELD MI

Personal Author(s):

Report Date:

1971-11-30

Pagination or Media Count:

42.0

Abstract:

The need for the on-site knowledge of large geological discontinuities ahead of rapid excavation is very desirable for avoiding hazardous or difficult formations ahead of excavation surfaces and for expediting the rate of excavation. The objective of this program is to study the feasibility of using ultrasonic acoustic signals and seismic impulses to rapidly predict the presence of large geological discontinuities or other potential sources of danger, such as old mine workings filled with water or gas, lying within a reasonable working range a few feet to a few tens-of-feet ahead of excavation surfaces. The principal geologic medium of interest is hard or crystalline rock.

Subject Categories:

  • Geology, Geochemistry and Mineralogy
  • Mining Engineering
  • Seismic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE