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Please use this identifier to cite or link to this item: http://hdl.handle.net/2080/1697

Title: Aacoustic emission trends in kaiser effect of rocks – a new approach for estimation of in situ stress
Authors: Jayanthu, S
Rao, G M Nagaraja
Prasad, BNVS
Keywords: acoustic emission
in-situ stress
Kaiser effect
Issue Date: May-2012
Publisher: MINETECH’12
Citation: MINETECH’12 –Workshop on Exploration, Exploitation, Equipment, Safety and Environment-4-5 May, 2012, Bhubhaneswar
Abstract: In the present paper, acoustic emission trends in the Kaiser effect of rocks was studies and possibility of its application in the estimation of in-situ rock mass stress was explored. Several methods have been proposed for estimating in- situ stress in the laboratory from rock core samples collected from the boreholes. Among them, Acoustic Emission (AE) method based on Kaiser Effect is the simplest. Conventionally, in-situ stress is estimated by plotting cumulative events versus stress. The change in the slope of the curve is an indicator of the Kaiser stress. In the present study, bore hole drilled samples from five sites were investigated in the laboratory by AE method for which the in-situ stress was already measured by hydrofracturing method. A plot of cumulative events versus stress indicated three types of trend and is named as Type 1, 2 & 3. It is easy to identify the Kaiser stress if the trend is of Type 1. Type 2 & 3 trends do not show any perceptible change in the slope of th...
Description: Copyright belongs to proceeding publisher
URI: http://hdl.handle.net/2080/1697
Appears in Collections:Conference Papers

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