Stress Measurement in Rock Mass
نویسنده
چکیده
Understanding and estimating the rock stress state has become increasingly important as nowadays numerical models are mainly used as rock engineering design tool. The objective in determining rock stresses may, in many cases, be seen as an interactive process. The type of data needed may change, depending on at what stage an underground project is in. Further more, preliminary measurements may reveal information on the stress state that will be useful as the project advances. Central Soil and Materials Research Station (CSMRS) is a premier institution in the investigation field of rock, soil and concrete properties. In situ tests are conducted to know the properties of rock mass. As far as the stress measurement is concerned, there are four methods practiced at CSMRS viz; Flat Jack, USBM Gauge, CSIRO cell and Hydro-fracturing method. The choice of the method depends on the requirement of design. The case studies are discussed in the light of experiences gained at different projects.
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