EVALUASI KEMAMPUAN PRODUKSI RIPPING DOZER RIPPER D375 UNTUK MENCAPAI TARGET PRODUKSI BATUBARA 180.000 TON BULAN OKTOBER DI TAMBANG AIR LAYA EXTENTION TIMUR FRONT LIMOA PT BUKIT ASAM (PERSERO) TBK UPTE

Evaluate Performance Production Of Dozer Ripper D375 To Have Coal Production Target Was 180.000 Ton On Month October In East Extention Of Tambang Air Laya Front Limoa Pt Bukit Asam (Persero) Tbk Upte)

Abstract

Coal production target in East extension of TAL Limoa Front was 180.000 ton/month in October
2015 but the target achieved only 115.967,59 ton with the percentage achievement of production
target at 64,4 %. Therefore it was necessary to evaluate performance of Dozer Ripper D375 number
series DZ 521. The evaluation conducted by taking primer actual data in mine site such as cycle
time, work distance, work effeciency, Ripper penetration and then the collecting data was processed
to make reparations of DZ 521 type of D375 Ripper with the aim to meet the production target. The
achieved production after prior evaluation conducted by increasing work time effeciency was
162.826,57 ton with the production achievement percentage at 90.45 % and the lack production was
17.173,43 ton, a further evaluation was conducted by repairing of Ripper penetration performance and
the production was 206.138,22 ton with the production achievement percentage at 114% and the
exceed production was 26138,22 ton. Then work time efficiency and Ripper penetration was improved
to obtain target production of 289.475,83 ton with the production achievement percentage at 160%
and exceed production of 109.475,83 ton with time reserve 150 hours/month and 4,8 hours/day
maybe can back up the problems on location production. The evaluation had been met coal
production target of Limoa Front.