Advertisement

Acta Seismologica Sinica

, Volume 5, Issue 3, pp 609–615 | Cite as

A data collection and analysis system for research on rock fracturing

  • Cantao Zhuang 
  • Su Xu 
  • Weixue Zhang
  • Zhaoyong Xu
  • Shirong Mei
Article
  • 3 Downloads

Abstract

We have made a data collection and analysis system for recording microcracks in rock to study the three dimensional pattern of fracture and the dynamic properties of rock during pressurization. This system, with 8 channel data detection, records in real-time, from the initial microcracks to the final vibration waveform excited by the master fracture. The detected data are recorded digitally at the hard disk of an IBM computer (or 286, 386 personal computer) as well as transmitted to disk. The sampling rate for each channel is 10 MHz.

Collecting every acoustic emission events in the loaded rock sample with 8 channels by this system, mathematically modelling the AE event travel time, and taking the coordinates of the AE event hypocenter and the three components of P wave velocity as unknown parameters, we set up a set of residual equations for joint inversion, so that the three dimensional localization of AE event hypocenters can be completed under variable velocities, which will lay foundations for the research on rock fracture clearly.

Key words

acoustic emission three dimemsional data collection 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Kusunose, K., Nishizawa, O. and Onai, K., 1982. AE gap in a rock under uniaxial compression.Earthquakes,35, 91–102 (in Japanese).Google Scholar
  2. Mogi, K., 1968. Source loaction of elastic shocks in the fracturing process in rocks (1).Bull. Earthq. Res. Inst., Tokyo Univ.,46, 1103–1125.Google Scholar
  3. Satoh, T., Idehara, O., Nishizawa, O. and Kinichiro, K., 1986. Hypocenter distribution and focal mechanisms of AE events under tri-axial compression.Earthquakes,39, 289–300 (in Japanese).Google Scholar
  4. Scholz, C. H., 1968. Experimental study of the fracturing process in brittle rock.J. Geophys. Res.,73, 4, 1447–1454.Google Scholar
  5. Sondergeld, C. H. and Estey, L. H., 1981. Acoustic emission study of microfracturing during the cyclie loading of Westerly granite,J. Geophys. Res.,86, 2915–2924.Google Scholar

Copyright information

© Acta Seismologica Sinica 1992

Authors and Affiliations

  • Cantao Zhuang 
    • 1
  • Su Xu 
    • 1
  • Weixue Zhang
    • 2
  • Zhaoyong Xu
    • 3
  • Shirong Mei
    • 1
  1. 1.Center for Analysis and PredictionState Seismological BureauBeijingChina
  2. 2.Computer DepartmentAcademia SinicaBeijingChina
  3. 3.Seismological Bureau of Yunnan ProvinceKunmingChina

Personalised recommendations