Abstract
The uniaxial compressive strength is one of important parameter to determine the shear strength of rock mass by the rock classification method. To determine uniaxial compressive strength used by a testing on laboratory or in practically can use t he index method, in this research, alternatively is to use Schmidt Hammer. A method used Schmidt Hammer to determine the uniaxial compressive strength of rock is to calibrate between Schmidt Hammer Rebound (R) and uniaxial compressive strength test of laboratory and its the results are an empirical equation. The advantage of this method can practically to assess the strength of rocks in the field. At this paper is one of the alternative uses of the uniaxial compressive strength determining in sedim entary rocks in Warukin Formation at Tutupan open pit coal, South Kalimantan, Indonesia. And the next research is going to process towards another formation.
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