Choudhury , P.B. and Chakraborty, A.K. and Singh, Satyendra Kumar and Raina, A.K. and Ramulu, M. and Sinha, A. and Haldar, A. and Jethwa, J.L (2003) Application of acoustic emission technique for indirect measurement of vertical insitu stress in rock mass - A lab-scale study. Journal of Rock Mechanics and Tunnelling Technology , 9 (1). pp. 35-48. ISSN 0971-9059

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Abstract

Rocks when subjected to cyclic loading and unloading emit acoustic signals. Without stress, there is no emission. An acoustic emission (AE) inspection is usually carried out during controlled loading of the samples. In this paper an attempts has been made to determine the maximum insitu stress to which the rock has been subjected to, due to stress variations since its formation using Kaiser and felicity effect. Samples of sandstone and compact basalt’s obtained from vertically drilled boreholes were subjected to cyclic compressive loading and unloading. An indirect evaluation technique of insitu stress using acoustic emission has been investigated and results are compared with other methods. It has been found that the vertical insitu stress results other methods.

Item Type:	Article
Uncontrolled Keywords:	Acoustic emission, felicity Ratio, Kaiser Effect, Insitu stress, Onset stress
Subjects:	Blasting
Divisions:	UNSPECIFIED
Depositing User:	Dr. Satyendra Kumar Singh
Date Deposited:	05 Dec 2011 05:40
Last Modified:	05 Dec 2011 05:40
URI:	http://cimfr.csircentral.net/id/eprint/267

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