Publishing House SB RAS:

Publishing House SB RAS:

Address of the Publishing House SB RAS:
Morskoy pr. 2, 630090 Novosibirsk, Russia



Advanced Search

Russian Geology and Geophysics

2001 year, number 10

Structure of acoustic and electromagnetic emission signals on axial compression of rock specimens

B. Ts. Manzhikov, L. M. Bogomolov, P. V. Il'ichev, and V. N. Sychev
Keywords: Acoustic emission, electromagnetic radiation, rock, constant load, fracture, detachment, shear, dislocation, charge, ionic bond, transient radiation
Pages: 1690-1696

Abstract

Study was given to a thin structure of pulses of acoustic and electromagnetic emission recorded on axial compression of specimens of rocks at the stage of their dilatantion deformation. Four types of signals have been distinguished in frequency and duration. It is supposed that the type I signals account for the formation of detachment fractures; the type II signals, of shear fractures; and the low-frequency type III signals correspond to vibrations of constructive elements of the loading device. The type IV signals are referred to as pulse electromagnetic emission caused by charged dislocations coming to a grain boundary in minerals with ionic bonds, components of granite.