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1-11 of 11
Keywords: acoustic emission
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Proceedings Papers
A. Hamanaka, Y. Makabe, K. Itakura, T. Sasaoka, H. Shimada, N. P. Widodo, B. Sulistianto, G. Deguchi
Paper presented at the ISRM Regional Symposium - 11th Asian Rock Mechanics Symposium, October 21–25, 2021
Paper Number: ISRM-ARMS11-2021-116
... is an invisible event. It is considered that Acoustic Emission (AE) monitoring is an effective technique for monitoring the underground gasification area since many fracturing activities occur in the coal seam due to coal heating. Therefore, the temperature condition of AE generations is investigated using...
Proceedings Papers
Paper presented at the ISRM Regional Symposium - 11th Asian Rock Mechanics Symposium, October 21–25, 2021
Paper Number: ISRM-ARMS11-2021-244
... Abstract In this study, uniaxial compression tests were conducted and acoustic emission monitoring technology was used on shales from the Liutang Village, Shizhu County, Chongqing City. The ringing count and energy evolution law during the compression process of shale samples were analyzed...
Proceedings Papers
Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-234
... (EMI) from any host structure over which they are bonded. Further, these sensors are capable of acquiring acoustic emissions (AE) as well. In the present study, an attempt has been executed to use thin piezo based transducers for acquiring EMI signatures and AE from a sand-stone specimen under...
Proceedings Papers
Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-039
... pollution are difficult to control because the process is invisible. The reactor in UCG is unstable and expands continuously due to fracturing activity caused by coal combustion. It is, therefore, considered that acoustic emission (AE) is an effective tool to monitor the fracturing activities and visualize...
Proceedings Papers
Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-274
... important to monitor the damage of geotechnical structures in real time and to estimate the potential of the structural failure. Acoustic emission (AE) and microseismic(MS) activities are low-energy seismic events associated with a sudden inelastic deformation of rock such as the movement of existing...
Proceedings Papers
Paper presented at the ISRM International Symposium - 6th Asian Rock Mechanics Symposium, October 23–27, 2010
Paper Number: ISRM-ARMS6-2010-117
..., location and intensity of potential rock fracture. Fracture development in stressed rock has been observed extensively in the laboratory by a number of methods. Nowadays, as an effective approach, acoustic emission (AE) techniques are broadly applied to rock to obtain the information on crack initiation...
Proceedings Papers
Paper presented at the ISRM International Symposium - 5th Asian Rock Mechanics Symposium, November 24–26, 2008
Paper Number: ISRM-ARMS5-2008-038
... Abstract This paper discusses the results of acoustic emission (AE) monitoring of two common rock mechanics testing methods: indirect tension strength (Brazilian) and uniaxial compression (UC) tests. The tests were carried out on very strong, isotropic gabbro rock specimens from North Africa...
Proceedings Papers
Paper presented at the ISRM International Symposium - 5th Asian Rock Mechanics Symposium, November 24–26, 2008
Paper Number: ISRM-ARMS5-2008-046
... evaluation of the dam stability in terms of the shear strength of the concrete lift joint or a discontinuity in the rock mass. The shear strength of these two types of joints is analyzed in this paper. Then the applicability of acoustic emission (AE) in monitoring the shear behavior of joints is discussed...
Proceedings Papers
Paper presented at the ISRM International Symposium - 5th Asian Rock Mechanics Symposium, November 24–26, 2008
Paper Number: ISRM-ARMS5-2008-041
...-called Kaiser Effect of acoustic emission (AE). This phenomenon, termed Kaiser Effect suggests that previously applied maximum stress might be detected by stressing a rock specimen to the stress level where there is a substantial increase in AE activity. Based on the Kaiser Effect, the previous stress...
Proceedings Papers
Paper presented at the ISRM International Symposium - 2nd Asian Rock Mechanics Symposium, September 11–14, 2001
Paper Number: ISRM-ARMS2-2001-022
... ABSTRACT: A numerical failure model of rock, RFPA(Rock Failure Process Analysis), is used to simulate the process of rock failure under different confining pressures, including acoustic emission produced by rock failure. We find that the spatial distribution of acoustic emission (A E) event...
Proceedings Papers
Paper presented at the ISRM International Symposium - 2nd Asian Rock Mechanics Symposium, September 11–14, 2001
Paper Number: ISRM-ARMS2-2001-009
... ABSTRACT: The acoustic emission as additional parameter measured. during the stress strain measurement in uniaxial conditions is described in this paper. There are many factors influencing the acoustic emission activity. The petographic character of the material influences very strongly the AE...