Theory and Practice of Rockstress Measurement by Borehole Deformation Method

Suzuki, Kô; Ishijima, Yoji

doi:10.2472/jsms.17.856

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Classification Of Measurement Techniques1

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“…Variations of borehole relief methods can be sub-classified according to the type of strain analysis at the borehole wall: (1) diametral strains (Leeman 1959;Obert et al 1962;Crouch and Fairhurst 1967;Suzuki 1969), (2) strains at the flat end of the borehole (Mohr 1956;Leeman 1971;Oka et al 1979), (3) strains at the hemispherical end of the hole (Sugawara et al 1986), and (4) strains at the conical end of the hole (Kobayashi et al 1987;Sugawara and Obara 1995). Disadvantages with the conical or hemispherical cell are that they require preparation of the bottom hole.…”

Section: Classification Of Measurement Techniquesmentioning

confidence: 99%