... of the artificially created diametric fracture. Two additional sensors were installed to obtain additional information: a total pressure sensor monitoring the radial swelling pressure and a mini-pressure sensor inserted within the diametric fracture that measure the pressure changes during the sealing process...

...T Schweisinger; L Murdoch; C Huey, Jr Fractures in rock hold important stores of water and petroleum, and slight changes in fracture aperture accompanying drawdown from pumping wells play a key role in recovering these resources. Two removable borehole extensometers were designed to measure small...

... is modified to carry out tests on fluid mass and heat transfer through rock joints/fractures and thermomechanical deformation of joints/fractures. Details of test procedures and techniques for conducting the coupled hydro-thermo-mechanical tests are described. Data on both natural joints and artificially...

... lower confining pressures. It is necessary that a stiff loading system, which will be discussed further below, be employed to obtain the residual strength of the rocks. KEY WORDS: rock mechanics, triaxial tests, Mohr failure theory, cohesion, friction angle, fractures, strain rate, stress-strain curves...