... referred to as Keillor Road Slide. This integrated approach illustrates the added value ob- tained when data and analyses are tightly integrated. 2 INTEGRATED APPROACH DEVELOPMENT 2.1 Framework Nearly all site investigation programs deals with sur- face mapping, geological information from borehole data...

... to develop the Ground Engineering Model requires several steps (Fig. 2). The Site De- scriptive Model is the geological description result- ing from both surface and borehole investigations. The essential component of the SDM is to commu- nicate the impact of the geological history on the rock mass...

..., Korea ABSTRACT: We performed more than 700 hydraulic fracturing stress measurements in 140 test boreholes in various parts of Korea during the past 7 years. In this paper, the overall characteristics of the initial rock stress state in Korea are studied. For depths less than 310 m, the stress ratio (K...

... damage zone was measured using velocity profiling and permeability measurements in radial boreholes. The results showed the distribution of damage was contained in a zone less than 1-m thick adjacent to the excavation boundary and that the damage was not uniformly distributed around the excavation...

... in numerical modelling studies for stabil- ity analysis and design and are also important in studying tectonic stresses for the prediction of earth quakes and seismic events. In situ stress measurement techniques currently in use include borehole fracturing methods such as hy- dro-fracturing (Fairhurst 1964...

... Overcoring Stress measurements by overcoring have been un- dertaken for many decades (Leeman 1969, Hooker et al. 1974). It involves creating a borehole, placing some device that measures strains or dimensions in the hole, and then drilling over the top of that hole to relieve the stress and thus cause...

... ABSTRACT ABSTRACT: Trials were undertaken in a narrow-vein mine of Northern Quebec, Canada, to monitor stress changes in sill pillars due to mining. Trials were carried out in active mine areas using vibrating wire proving rings and short extensometers, installed in boreholes to monitor radial...

...) The operations are conducted on the surface through boreholes, and hence will not interfere with underground mining operations. (2) The technology uses waste material (e.g. flyash or coal washery fines) as the injection materi- al, hence reduces the need for surface waste disposal and the associated...

...1 INTRODUCTION The Swedish Nuclear Fuel and Waste Management Company (SKB) is responsible for the disposal of spent nuclear fuel in Sweden. The fuel is to be placed in copper canisters that will be deposited in vertical 8-m-deep 1.8-m-diameter boreholes at 400- 700 m depth in crystalline rock...

... conditions not only cause borehole instability problems, affecting drilling performance, but also challenge the current borehole modeling methods. To keep wellbore from shear failure and tensile fail- ure in this narrow mud weight window, wellbore strengthening is of crucial importance. Different methods...