A STUDY ON ROCK STRESS DETERMINATION BY BOREHOLES STRESS CHANGE MEASUREMENT USING CONTROLLED FRACTURING TECHNIQUE

To search a simple low cost method of rock stresses measurement, a improved parallel boreholes method of rock stress determination with use of controlled fracturing technique is proposed. In this paper the feature of parallel boreholes method for observation of rock stresses and the principle of controlled fracturing technique are described.A foundamental theory of rock stress determination by boreholts stress change measurement using controlled tracturing technique is presented.