Kajian Produktivitas Stone Crusher Batuan Andesit Di Pt. Eka Praya Jaya Kabupaten Lombok Timur Provinsi Nusa Tenggara Barat

Abstract

Andesite rock mining is carried out at PT. Eka Praya Jaya uses the quarry mining method, by first scattering the andesite rock mechanically using an excavator. In stone crusher crushing activities, mechanical and non-mechanical damage often occurs, thus affecting the productivity of the stone crusher. The aim of the research is to determine the productivity of the stone crusher tool to achieve production targets, the obstacles to the stone crusher tool and controlling obstacles on the stone crusher tool to increase the productivity target. The data is processed using Microsoft Excel to determine stone crusher production, analyze obstacles, equipment availability, to increase productivity. From the results of observations during research, mechanical devices could not achieve the production targets set by the company. The actual production obtained by the stone crusher is 995.05 tons/month with mechanical resistance of 66.62 hours/month. Non-mechanical resistance is 43.65 hours/month so the total resistance time is 110.29 hours/month with work efficiency. 43.79%/month with mechanical availability of 69.98%, physical availability of 71.51%, usage availability of 73.90% and all-time availability of 52.85%. Efforts to increase production carried out to achieve production targets are carrying out analysis and efforts to increase available working time and factors that influence work by increasing effective working time, creating standard operational procedures so that production activities are more organized so that time lost due to production activities can be reduced, mechanical control reduces the size of the feed that enters the hooper, carries out periodic tool checks and non-mechanical control takes firm action by the company against employees who have violated company rules, re-arranging work schedules so that obstacles can be avoided.