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3 <br />r <br />• <br />GEOTECHNICAL CORE LOGGING <br />GENERAL <br />Geotechnical core logs were prepared for roof, Upper Wheeler <br />Seam, interburden, Lower Wheeler Seam and floor materials in <br />Drill Holes 3.75 and 8A. The logged zone began 25 to 40 feet <br />above the Upper Wheeler Seam, continued down through the seam, <br />the immediate floor and interburden to the Lower Wheeler Seam and <br />then included about 15 feet of floor. All logging was done in <br />the SEEGMILLER laboratory in Salt Lake city, Utah. <br />PROPERTIES LOGGED <br />A total of approximately 206 feet of roof, coal, interburden <br />and floor was logged for geotechnical properties. Items logged <br />include rock type, color, grainsize, interbedded condition, <br />structural appearance, carbonaceous content, broken or solid nature, <br />induration, hardness, jointing and a angles, bedding separations, <br />• unusual features, competency, estimated compressive strength, <br />cavability, roof support, bearing capacity, recovery, RQD and <br />point load strength(axial, diametral and anisotropy). Both graphic <br />and descriptive logs were prepared. The graphic logs show the <br />rock types, discontinuities and broken zones. The descriptive <br />logs are divided into zones of similar materials with similar <br />characteristics. <br />LOGGED RESULTS <br /> <br />The individual graphic and descriptive logs are presented in <br />Appendix I. Included as a preamble to the logs are explanations <br />of some of the technical codings and designations used in logging. <br />Specific definitions of the rock type names are also included. <br />~SULTS DISCUSSION <br />Upper Nheeler Roof. The immediate roof above the Upper <br />Wheeler Seam is generally strong and competent. In Drill Hole <br />SEEGMII I FR INTERNATIONAL <br />