... reservoir geomechanics lfj test flat jack test interpretation deformability Reservoir Characterization calculation crack depth flat jack contiguous slot variation Figueiredo tensile crack depth rock mass deformability rock mass situ stress tensile strength numerical model...

... the actual flat jack pressurization cycles. '. , 'The successful conduct of these comparati ve testing techniques has allowed Sandia National Laboratories (SNL) to undertake a comprehensive evaluation of the mechanical behavior of the Yucca Mountain welded tuffs, including determination of rock mass modulus...

.... These are a Plate Load Test (PLT) and a Large flat Jack Test (LFJT). As regards small in situ tests for defining rock mass deformability, dilatometer and borehole jack tests should be mentioned. Since with this testings the rock volume is slightly larger than that of a laboratory sample, they cannot serve...

... to the stress and strain conditions to be expected in situ. This requires a more general loading with three independent load axis. An often practised procedure is the application of large flat jack tests or load plate tests in different directions. Those tests however, are limited to the investigation...

... ABSTRACT: LNEC has been developing the small flat jack (SFJ) method for the in situ measurements of the state of stress based on stress' relief by opening slots, and also to evaluate the deformability of the rock mass. A new interpretation model for this method was developed, using a 3-D...

... the Flat Jack method are described in the paper. 2.0 The Nagjhari Tunnel. 2.1 The 10 km long Nagjhari Water Conductor system is a major constituent of the massive Kalinadi Hydro-electric Project, under execution, to tap the rich power potential of the Kali river valley in the west coast of Kernatake...

... SUMMARY: Three different types of loading tests for in-situ rock mass modulus determination. namely. plate bearing. small flat jack and Goodman jack tests. were applied during the exploratory stage of a major hydro-electric project in South Africa. The paper outlines the principles on which...

... rock mass dilatometer test gallery moduli correlation deformability borehole diagram determination flat jack plane application consideration reservoir characterization deformeter means excavation half space 2-21 A New Method for the Determination of Deformability in Rock...

... Summary The Authors describe a new technique developed at the LNEC for determining stresses inside rock masses by the flat-jack method. The technique essentially consists in cutting a slot with a cutting machine in order to minimize the disturbance in the rock mass and making it possible...