Draft standard guide for estimating the in-situ modulus of rock masses using the NX-borehole jack
Conference
·
OSTI ID:6855049
The objective of this test is to estimate the in-situ modulus of a rock mass at various depths and orientations. Information on time-dependent deformation may also be obtained. The NX jack provides unidirectional pressure to the walls of an NX borehole (3 in. or 7.62 cm in diameter), by means of two opposed curved steel platens each covering a 90/sup 0/ sector, over a length of 8 in. (20.3 cm).
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6855049
- Report Number(s):
- UCRL-90281; CONF-840666-1; ON: DE84006135
- Country of Publication:
- United States
- Language:
- English
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