Evaluasi Geometri Jalan Tambang Untuk Peningkatan Produktivitas Alat Angkut pada Blok II 13 PT. Semen Indonesia (Persero) Tbk Tuban

Abstract

Unsifficient haul road geometry can lead to decreased productivity and increased safety risks in mining operations. This issue was identified at Block II 13 of PT Semen Indonesia (Persero) Tbk, Site Tuban, where several road geometry parameters—such as width, superelevation, cross fall, and grade—did not meet the standards set by the Indonesian Ministerial Decree No. 1827 of 2018 and AASHTO guidelines. This study aims to evaluate the existing haul road geometry, design a road layout that adheres to applicable standards, and analyze its impact on haul truck productivity. The research method included literature review, field observation, collection of primary and secondary data, road geometry calculations using Excel and mining software, and productivity simulation based on the improved road design. The analysis compared the actual conditions with the proposed design in terms of both technical parameters and operational performance. The results showed that out of 34 road segments examined, 12 segments did not meet the required minimum width, while 9 segments needed cross fall adjustments. Superelevation and grade values for all segments were within acceptable limits. After implementing the improved road geometry, the productivity of the haul trucks increased from 64.03 tons/hour to 73.93 tons/hour, exceeding the company’s target of 70 tons/hour. Average truck speed also improved, and cycle time was significantly reduced. Improving the geometric design of haul roads directly contributes to increased transportation efficiency and enhanced operational safety. These findings are expected to serve as recommendations for future planning and management of haul road infrastructure in other mining areas.