Fault Plane Solutions of Acoustic Emission Induced by Progressive Excavations of an Underground Powerhouse

Ishida, Tsuyoshi; Kanagawa, Tadashi; Uchita, Yasuo; Urayama, Masaru

doi:10.2208/jscej.1995.529_19

Cited by 2 publications

(1 citation statement)

References 13 publications

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“…The results demonstrate that even with regard to chambers carefully excavated under low-stress conditions at a shallow depth and with sufficient reinforcement, AE monitoring can provide useful information for stability assessment. In this paper, we present and discuss data previously reported separately in earlier symposiums [14,15] together with new data.…”

Section: Introductionmentioning

confidence: 71%

Acoustic emission induced by progressive excavation of an underground powerhouse

Ishida

Kanagawa

Uchita

2014

International Journal of Rock Mechanics and Mining Sciences

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a b s t r a c tWe monitored acoustic emission (AE) events associated with the progressive excavation of an underground chamber for a powerhouse at a depth of 280 m below the surface in a porphyritic rock mass of the Mesozoic era. Large AE events rarely occur under such conditions; specifically, low-stress environments due to the shallow depth, careful excavation, and sufficient reinforcement. However, upon employing sensitive, high-frequency monitoring (15 to 40 kHz) in a relatively small region, some AE events were located and, by using fault-plane solutions, their fracture mechanisms were identified. Strike and dip angles of fracture planes and the directions of principal stresses, all derived from faultplane solutions, were consistent with the directions of dominant joint surfaces, the measured initial stress conditions, and the shape of nearby excavated openings. This suggests that by employing sensitive, high-frequency AE monitoring, fault-plane solutions can be effectively utilized as a tool to assess the stability of a chamber excavated at shallow depth, as well as in deep mines where fault-plane solutions have already been used in practice to assess and control rockbursts.

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Section: Introductionmentioning

confidence: 71%

Acoustic emission induced by progressive excavation of an underground powerhouse

Ishida

Kanagawa

Uchita

2014

International Journal of Rock Mechanics and Mining Sciences

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Various Numerical Simulation Methods for Acoustic Emission in Rock

Ishida¹,

Shimizu

Abe

2011

Journal of the Mining and Materials Processing Institute of Jap

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AE (Acoustic Emission)AE (Acoustic Emission) or MS (Microseismicity) is a very useful method to understand fracture mechanism and to predict serious rock fracture like rockburst. This method can be applied to monitor reservoirs where water and gas are injected, for example, in underground sequestration of carbon dioxide and in EOR (Enhanced Oil Recovery) of petroleum industry. If a numerical simulation helps to interpret AE monitoring results, AE monitoring would become much more powerful tool for the rock engineering. Thus, in this paper, the authors review various methods that can simulate occurrence of AE events incorporating inhomogeneity of rock.A

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Fault Plane Solutions of Acoustic Emission Induced by Progressive Excavations of an Underground Powerhouse

Cited by 2 publications

References 13 publications

Acoustic emission induced by progressive excavation of an underground powerhouse

Acoustic emission induced by progressive excavation of an underground powerhouse

Various Numerical Simulation Methods for Acoustic Emission in Rock

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