PENENTUAN FAKTOR KONVERSI (K) NILAI UCS (UNIAXIAL COMPRESSIVE STRENGTH) BERDASARKAN NILAI PLI (POINT LOAD INDEX) PADA BATUAN PENYUSUN LERENG TAMBANG BATU HIJAU PT NEWMONT NUSA TENGGARA
Daftar Isi:
- The research is located in the work contract of open pit mine of PT Newmont Nusa Tenggara which is administratively situated in Batu Hijau exactly at the southwestern part of Sumbawa, Nusa Tenggara Barat province. Geographically the research area lies in coordinate 116,400 - 116,550 east longitude and 8,500 - 9,050 south latitude. The research area divides into several rock units, namely a unit of Volcanic, Diorite, and Tonalit rocks. The geological structure in the area of research in general leads to southeastern Northwestern. In studies of Geotechnics, PLI (Point Load Index) and Uniaxial Compressive Strength (UCS) test are used to determine the value of the rock strength. PLI tool and test procedure allows the test can be done more economically than the test of UCS. The conversion factor ( K ) can be used to estimate the value of UCS based on PLI value. The value of K has been proposed by some researchers earlier for some types of rocks. This research was conducted by performing the test with the UCS and PLI on every unit of rocks of the area of research. There are 80 units test UCS and PLI on a unit Volcanic, 44 on a unit Diorite, and 30 units of tests on a unit Tonalit. Keywords: Open Pit Mine, Batu Hijau, Point Load Index (PLI), Uniaxial Compressive Strength (UCS), Conversion factor (K).