Accession Number:

AD0766429

Title:

Rock Classification and Rock Property Listing

Descriptive Note:

Annual technical rept. (Final) 1 Jan-31 Dec 1972

Corporate Author:

BUREAU OF MINES TWIN CITIES MN TWIN CITIES MINING RESEARCH CENTER

Personal Author(s):

Report Date:

1973-06-30

Pagination or Media Count:

40.0

Abstract:

The Bureau of Mines conducted a project for the Advanced Research Projects Agency ARPA Rock Mechanics and Rapid Excavation program to investigate rock classification as one means to improve rapid excavation technology. A standard rock suite was established, tested for standard properties, and distributed to contractors on request in the form of 1 cubic foot blocks. An extensive listing of ten physical-mechanical rock properties was compiled from Bureau and outside literature sources and is being presented in a Bureau of Mines Information Circular. A new technique for direct laboratory measurement of rock fracture energy was established. The requirements that must be met to build and to use a comprehensive rock classification system for predicting rapid excavation advance rate are discussed.

Subject Categories:

  • Geology, Geochemistry and Mineralogy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE