SEDL / STP / STP750-EB / STP28344S

Acoustic Emission Signatures of Various Rock Types in Unconfined Compression

Boyce, GM
Research assistant, research associate, and professor of Civil Engineering, Drexel University, Phila., Pa.

McCabe, WM
Research assistant, research associate, and professor of Civil Engineering, Drexel University, Phila., Pa.

Koerner, RM
Research assistant, research associate, and professor of Civil Engineering, Drexel University, Phila., Pa.

Pages: 13    Published: Jan 1981

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Abstract

An investigation of ten rock types in unconfined compression has led to four distinct types of stress versus acoustic emission response curves, that is, signatures. These are the originally proposed Mogi type, and three variations of this generalized behavior, that is, unstable, dense, and dense unstable types. They have been correlated to conceptual ideas on brittle rock behavior. Frequency analysis on all rock types at each stage of the various stress ranges has also been performed. Trends in peak frequency shifting are presented with implications as to the use of this information.