CORRELATION OF UNIAXIAL COMPRESSIVE STRENGTH WITH BRAZILIAN TENSILE STRENGTH AND INDEX PROPERTIES FOR SOFT SEDIMENTARY ROCKS

Sedimentary Rocks composing the Thar Lignite basin Pakistan are of clastic origin. These rocks have comparatively low uniaxial compressive strength (UCS) values, and hence recognized as ‘soft sedimentary rocks’ in this study. UCS is a fundamental property rocks, used by mine design engineers designing surface underground excavations. The purpose study to investigate relationship between with Brazilian tensile (BTS), index properties soft rock formations at basin. Various correlations mechanical physical been developed previously. However, no significant correlation has on BTS for rocks. Numerous Rock samples from Two complete geotechnical drillholes Block-IX Coalfield were selected. Standard test procedures implemented determine UCS, indirect Tensile such point load strength, shore Scleroscope hardness. established using simple multiple regression techniques, empirical equations obtained. can be predict performing tests; which quick, economical, easier performed site.