... and also after completion. The authors have developed an AE (acoustic emission) monitoring system. By using this system, the excavation of rock caverns for the storage of crude oil has been monitored. This paper describes the results of these experiments and discusses the practical procedures to predict...

.... Comparison of the theoretical results obtained, with the experimental ones is presented. Upstream Oil & Gas mechanism small crack brittle rock Reservoir Characterization salganik ground contact area brittle material fracture dependence reservoir geomechanics acoustic emission intensity...

... ABSTRACT: Laboratory results from triaxial deformation tests on sandstone are presented where changes in the elastic P-wave and S-wave velocity have been measured and compared, and in addition the rate and amplitude distribution of acoustic emission events has been recorded. The experiments...

...Rock at Great Depth, Maury & Fourmaintraux (eds), © 1989 Balkema, Rotterdam. ISBN 90 6191 9754 In situ investigation of loosened zone around deep underground openings by acoustic emission monitoring technique Etude in situ de Ia zone rornpue autour d'une excavation profonde par Ie suivi des...

... acoustic waves to be measured along the cylindrical sample axis during loading, while acoustic emissions can be simultaneously measured, and waveforms are recorded. I INTRODUCfION Our laboratory has long been engaged in experimental rock deformation studies under crustal conditions (Edmond & Murrell 1973...

... Acoustic Emission (hereinafter abbreviated to "AE") has been drawing attention in the field of civil engineering in recent years and many kinds of investigations have been made. Hardy (1981) put together a study of AE concerning rock masses. AE, which is called "Microseismic Activity" in the field...

...Rock at Great Depth, Maury & Fourmaintraux (eds), © 1989Balkema, Rotterdam. ISBN 90 61919754 Characterization of acoustic emission waveforms produced by rock during mode I and mode II crack propagation Caracterisation de la forme des andes acoustiques produites par la roche pendant la fissuration...

... ABSTRACT: Extensive laboratory investigations have resulted in the development of Kaiser Effect Gauging as a practical system to determine the pre-existing in-situ stress by Acoustic Emission (AE) analysis of an extracted core. The principle is based on the phenomenon of Kaiser Effect which...

... acoustic emission investigation rupture partir emission importante Reservoir Characterization acoustique emission acoustique apparition contrainte civil engineering application du materiau modèle materiau surveillance fissure Supervision APPLICA TION DE L'EMISSION...

...Proceedingsof the International Symposium on Weak Rock / Tokyo /21-24 September 1981 Acoustic Emission and Over Coring Methods for measuring tectonic stresses TADASHI KANAGAWA, MASAO HAY ASHI & YOSHIHIRO KITAHARA Central Research Institute of Electric Power Industry, Abiko-shi, Japan 1 INTRODUCTION...