Evaluation of Ripper Productivity (Caterpillar D8R) Based on Strengthness of Rock at PT Kitadin Embalut Site Tenggarong Subdistrict Kutai Kartanegara East Kalimantan Province

Abstract

The purpose of this study is to examine the updates based on the level of productivity of the ripper and the uniaxial strength of the rock. First to know the ripper productivity and second to know the value of the compressive strength of the rock. After that to determine the relationship between the level of riper productivity with uniaxial strength of the rocks.Location research area at PT. Kitadin Embalut site is to conduct the preparation, observation and measurement directly in the field. Productivity level is calculated by volume and length method. The parameters measured are the depth of penetration, the width of ripper, the length of the track and the timing of the update. To know the strength of the rocks is done a strong uniaxial test pressure rocks in geotech lab. Uniaxial Compressive Strength test refers to SNI 2825: 2008. The minimum test sample size is 3 pieces with a sample dimension of 2 <l / d <2.5 where the samples are taken randomly from the results of the ripper. Linear regression analysis needs to be done to determine the level of relationship between two variables and how much influence the independent variable to the dependent variable.Result of research on evaluation of ripper productivity based on rock strength of PT. Kitadin is then obtainedthe average productivity of ripper (Caterpillar D8R) at the research site is 315.74 m3/hour for the Siltsone while for sandstone 250.09 m3/hour. From uniaxial strength test (UCS) average rock strength at research location is 7.27 Mpa for Siltsone whereas for sandstone 11,75 Mpa. The results of linear regression analysis between rock strengths obtained based on uniaxial compression rock strength (UCS) has a very close. For siltstone obtained correlation value (r) -0.968 and sandstones (r) -0.934. For the value of regression equations for rocks Y = 417.322-13.961X and sandstone "Y = 487.591-20.203X" the relationship of both is inversely proportional.