In situ stress measurement by hydraulic fracturing at the Kamaishi mine

Kazuo Hayashi, T. Ito

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Hydraulic fracturing stress measurement was performed by using a 30m-deep well drilled in the Kamaishi iron mine. Eight transverse cracks crossing the well obliquely were obtained. By re-plotting the shut-in curves, i.e., the pressure-time records after shut-in, into dT/dP vs. P plots (T: time, P: wellbore pressure), shut-in pressure was determined objectively. By using the shut-in pressure of the eight transverse cracks, three-dimensional stress field was evaluated based on the assumption that the shut-in pressure of a transverse crack gave a good estimate of the magnitude of the normal stress acting perpendicularly to the crack. Finally, the reliability of the evaluated stress field is discussed.

Original languageEnglish
Pages (from-to)951-957
Number of pages7
JournalInternational Journal of Rock Mechanics and Mining Sciences and
Issue number7
Publication statusPublished - 1993 Dec

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Engineering(all)


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