@thesis{thesis,
		author={Anugrah  Pebriyanto and Siswomartono  Hastanto},
		title ={Analisis Produktivitas dan Efisiensi Alat Berat Mixer Truck Di Batching Plant GBC (Grasberg Block Cave) CIP Untuk Tambang Bawah Tanah DMLZ (Deep Mile Level Zone) PT Freeport Indonesia},
		year={2020},
		url={http://156.67.221.169/3374/},
		abstract={One of the underground mining areas of PT Freeport Indonesia which is currently operating is themine DMLZ (Deep Mile Level Zone). In the implementation of these underground mining activities, astage is carried out development. The development stage is an important part of underground mining operations, because at this stage the infrastructure development activities needed to support these underground mining activities are carried out. One of the jobs at thestage development is buffer system. The buffer system used in the mine area underground DMLZ (Deep Mile Level Zone) is usingor better known as shotcreteshotcrete. The need for shotcrete is produced at the batching plant and distributed using a heavy mixer truck as a means of transport.
This research was conducted with the aim of finding the value of productivity and work efficiency of theheavy equipment mixer truck and to analyze the research data. Analysis of the data showed that the value of productivity that can be achieved by means ofweight a mixer truck is 28.48 m3/ shift but the realization only reached 22.89 m3/ shift with the efficiency of the working time of 80.21 %% tool in the field of available time. Physical Availability (PA) of the tool is obtained that the average value of Physical Availability (PA) is 96.88%, this indicates that the condition of the tool is very supportive in the shotcerete distribution process while the average UA (Used of Availability) value is 63.65% which indicates that the tool is not used properly.}
		}