Summary
A new technique, the Double Fracture Method ofin situ stress measurement, is described with regard to its theoretical principles and field instrumentation. The method differs from the hydraulic fracture method in that the loading fluid is prevented from penetrating into the induced fractures. In the new method, the loading pressure is raised to create a set of two mutually perpendicular microfractures on the borehole boundary. The principal stresses and their orientation in the plane normal to the borehole can be deduced from the diametral deformation of the borehole. Laboratory and field measurements validating the method are discussed.
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References
Jaeger, J. C., Cook, N. G. W. (1976): Fundamentals of rock mechanics, 2nd ed., Science Paperbacks, New York.
Sakuma, S., Kikuchi, S., Nakamura, T., Mizuta, Y., Nakagawa, K. (1988): Examples of in situ stress measurements using Double Fracture Method. In: Proc., 9th West Japan Symposium on Rock Engineering, July, 88–94.
Sakuma, S., Kikuchi, S., Mizuta, Y., Serata, S. (1989): In situ stress measurement by Double Fracturing. In: Proc., Japan Society of Civil Engineering, 406/III-11, June.
Serata, S., Bellman, R. A. (1983): Development of the Serata Stress-measuring system for application to both hard-brittle and soft-ductile grounds. In: Proc., 24th U. S. Symposium on Rock Mechanics, Texas A and M University, College Station.
Serata, S., Kikuchi, S. (1986): A diametral deformation method for in situ stress and rock property measurement, Intern. J. Min. Geolog. Engin. 4, 15–38.
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Serata, S., Sakuma, S., Kikuchi, S. et al. Double fracture method ofin situ stress measurement in brittle rock. Rock Mech Rock Engng 25, 89–108 (1992). https://doi.org/10.1007/BF01040514
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DOI: https://doi.org/10.1007/BF01040514