Evaluation of E2 Mode Configuration on Komatsu HD785-7 Dump Trucks for Improving Fuel Efficiency in Downhill Haulage Operations

yuni sudarwanto, Rulyenzi Rasyid, Rulyenzi Rasyid, Miftahul Fadillah, Miftahul Fadillah

Abstract

Fuel consumption by dump trucks is a major contributor to operating costs and emissions in open-pit mining. This study evaluates the change in hourly fuel consumption associated with implementing E2 Mode on Komatsu HD785-7 dump trucks assigned to haul routes dominated by loaded-downhill travel at a mining contractor in East Kalimantan, Indonesia. A quantitative before-and-after quasi-experimental design was used. The study included the entire population of 24 trucks through total sampling. The pre-implementation period covered Month 1–Month 3 under E3 Mode, whereas the post-implementation period covered Month 4–Month 12 under E2 Mode. One operating-mode average was calculated for each truck, producing 24 paired fuel-consumption observations. The paired differences were analyzed using the Shapiro–Wilk test and a two-tailed paired-samples t-test at a 5% significance level. Average fuel consumption decreased from 68.0 to 60.0 L/h, a reduction of 8.0 L/h or 11.76%, t(23) = −28.132, p < 0.001, 95% CI [−8.588, −7.412]. Descriptively, productivity increased from 333 to 338 BCM/h, while cycle time changed only slightly from 18.302 to 18.403 min/cycle. Payload, haul distance, average speed, and average monthly operating hours per truck also remained broadly comparable. Because inferential tests were not available for these operational indicators and the study had unequal periods with no concurrent control group, the result should be interpreted as a strong association under the evaluated conditions rather than definitive causal evidence.
Keywords: E2 Mode, fuel efficiency, Komatsu HD785-7, downhill haulage, mining dump truck.

 

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References

R. K. Ahluwalia, X. Wang, D. D. Papadias, and A. G. Star, “Performance and total cost of ownership of a fuel cell hybrid mining truck,” Energies, vol. 16, no. 1, Art. no. 286, 2023, doi: 10.3390/en16010286.

Q. Wang, R. Zhang, S. Lv, and Y. Wang, “Open-pit mine truck fuel consumption pattern and application based on multi-dimensional features and XGBoost,” Sustainable Energy Technologies and Assessments, vol. 43, Art. no. 100977, 2021, doi: 10.1016/j.seta.2020.100977.

J. J. Posada-Henao, I. Sarmiento-Ordosgoitia, and A. A. Correa-Espinal, “Effects of road slope and vehicle weight on truck fuel consumption,” Sustainability, vol. 15, no. 1, Art. no. 724, 2023, doi: 10.3390/su15010724.

P. Bodziony and M. Patyk, “The influence of the mining operation environment on the energy consumption and technical availability of truck haulage operations in surface mines,” Energies, vol. 17, no. 11, Art. no. 2654, 2024, doi: 10.3390/en17112654.

Komatsu Ltd., HD785-7 Rigid Dump Truck, Product Brochure CEN00136-09. [Online]. Available: Komatsu HD785-7 Product Brochure. Accessed: Sep. 6, 2026.

A. Vera-Burau, D. Álvarez-Ramírez, L. Sanmiquel, and M. Bascompta, “A comparison of the fuel consumption and truck models in different production scenarios,” Applied Sciences, vol. 13, no. 9, Art. no. 5769, 2023, doi: 10.3390/app13095769.

O. Gölbaşı and E. Kina, “Haul truck fuel consumption modeling under random operating conditions: A case study,” Transportation Research Part D: Transport and Environment, vol. 102, Art. no. 103135, 2022, doi: 10.1016/j.trd.2021.103135.

S. Alamdari, M. H. Basiri, A. Mousavi, and A. Soofastaei, “Application of machine learning techniques to predict haul truck fuel consumption in open-pit mines,” Journal of Mining and Environment, vol. 13, no. 1, pp. 69–85, 2022, doi: 10.22044/jme.2022.11577.2145.

D. Meneses and F. D. Sepúlveda, “Modeling productivity reduction and fuel consumption in open-pit mining trucks by considering the temporary deterioration of mining roads through discrete-event simulation,” Mining, vol. 3, no. 1, pp. 96–105, 2023, doi: 10.3390/mining3010006.

G. Tadubana, B. Sigweni, and D. A. Azerikatoa, “Systematic review on prediction of haulage truck fuel consumption in open-pit mines,” International Journal of Mining, Reclamation and Environment, vol. 38, no. 10, pp. 833–850, 2024, doi: 10.1080/17480930.2024.2357509.

K. Awuah-Offei, “Energy efficiency in mining: a review with emphasis on the role of operators in loading and hauling operations,” Journal of Cleaner Production, vol. 117, pp. 89–97, Mar. 2016, doi: 10.1016/j.jclepro.2016.01.035.

S. S. Rai, V. M. S. R. Murthy, N. Sukesh, A. Sairam Teja, and S. Raval, “Operational efficiency of equipment system drives environmental and economic performance of surface coal mining—A sustainable development approach,” Sustainable Development, vol. 29, no. 1, pp. 25–44, Jan. 2021, doi: 10.1002/sd.2129.

H. Bao, P. Knights, M. Kizil, and M. Nehring, “Electrification Alternatives for Open Pit Mine Haulage,” Mining, vol. 3, no. 1, pp. 1–25, Jan. 2023, doi: 10.3390/mining3010001.

P. Bodziony, Z. Krysa, and M. Patyk, “Operational Environment Effects on Energy Consumption and Reliability in Mine Truck Haulage,” Energies, vol. 18, no. 12, p. 3022, Jun. 2025, doi: 10.3390/en18123022.

Kevin Dagenais, “Applying Machine Learning Techniques to Decarbonize Mine Haulage and Accelerate the Transition to Zero Emission Mining,” in 12th International Copper Conference, Cham: Springer Nature Switzerland, 2025, pp. 1369–1373. doi: 10.1007/978-3-032-00102-3_127.

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