Dump truck productivity enhancement through haul road geometry correction: a rimpull-based cycle time simulation

Jurnal Riset Tindakan Indonesia October 08, 2026 Volume 11, Number 2 4 authors

Abstract

This study aimed to evaluate haul road geometry on the overburden route of Pit B at a coal mining contractor in Sarolangun, Jambi, Indonesia, and to estimate dump truck cycle time and productivity after geometry correction. An observational–evaluative field design was applied: 48 cross-sections of a 523.82 m road were surveyed with a Total Station and assessed against the Indonesian good mining practice decree, 30 truck trips were timed, and the corrected condition was simulated with a rimpull–resistance model. Only 18.75% of cross-sections met the study design criterion for two-lane width, the steepest descent reached −21.68% against a 12% limit, 45.8% met the cross-slope range on a two-side mean basis, and all curve radii complied. Delays caused by narrow and steep sections made up 69.2% of total delay. Correcting grade and width was predicted to reduce the cycle time from 11.99 to 9.47 minutes (21.0%; 95% bootstrap interval 20.1–21.9%) and to raise truck productivity from 32.06 to 40.60 bank cubic metres per hour (26.6%). If only half of the assumed speed gains were realised, the reduction would fall to 14.7%. These are simulation-based predictions that require field validation after road correction.

Authors

  1. Dzaki Naufadhilah Ramadhan Efendi

    Universitas Negeri Padang

  2. Jukepsa Andas

    Universitas Negeri Padang

  3. Heri Prabowo

    Universitas Negeri Padang

  4. Syari Rahma Yanti

    Universitas Negeri Padang

Keywords

Haul road geometryCycle timeDump truck productivityOverburden removalRimpull–resistance simulation

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