ROCK STRESS MEASUREMENTS IN DEEP BOREHOLES. NEW METHODS

BERGTRYKKSMAALINGER FRA DAGEN I DYPE BORHULL. NYE METODER

Rock stress measurements in deep water-filled boreholes have for a long time been of great interest. This paper describes the development and research work which has taken place at the Rock Mechanics Laboratory, Univesity of Trondheim. This has resulted in a further development of the Leeman triaxial gauge, which is now to be tested in the field. The main problem is to find suitable strain gauge cement. The paper also describes a similar development by Dr Hiltsche, Swedish State Power Board, who has made successful measurements down to a depth of 325 M. Finally, the paper also describes the hydraulic fracturing method for rock stress determination at great depth. Originally a method used by the oil industry to increase well output, the principle can also be used for stress detemination within cetain limits. The method is of interest because there is no need of overcoring or stress relief. (a) (TRRL)

  • Availability:
  • Corporate Authors:

    Tapir

    Trondheim University, Gloeshaugen
    Trondheim-NTH,   Norway 
  • Authors:
    • Myrvang, A
  • Publication Date: 1980-2

Language

  • Norwegian

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00330243
  • Record Type: Publication
  • Source Agency: Norwegian Road Research Laboratory
  • ISBN: 82-519-0377-7
  • Files: ITRD, TRIS
  • Created Date: Apr 15 1981 12:00AM