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All Journal Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal)
Aullia Bintang Jaladri
UPN "Veteran" Yogyakarta
Agriculture, Biological Sciences & Forestry Chemistry Education Physics

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Prediksi Kecepatan Pengeboran Menggunakan Regresi LASSO pada Lapisan Interburden Batubara Aullia Bintang Jaladri; Bagus Wiyono; Singgih Saptono; Tedy Agung Cahyadi; Hakim Erlangga Bernado Sakti
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 3 (2026): August (Inpres)
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i3.2280

Abstract

Rotary drilling operations at Pit Bendili, PT Kaltim Prima Coal, require operational parameter optimization to achieve the company’s target Rate of Penetration (ROP) of 110 m/h. Drilling speed is significantly influenced by the interaction between mechanical operational factors and rock characteristics. Pit Bendili has an average Uniaxial Compressive Strength (UCS) of 15.46 MPa, classified as weak rock, yet hardness variations between coal seams cause workload fluctuations. This study aims to model and analyze the combination of pulldown pressure (PP) and rotational pressure (RP) on the velocity of penetration (VP) to meet the ROP target. Operational parameters were modeled using the Python-based Least Absolute Shrinkage and Selection Operator (LASSO) Regression method. Analysis of 134 blast hole operational datasets yielded a Mean Absolute Percentage Error (MAPE) of 7.9%, indicating excellent predictive model accuracy. Through this LASSO model, PP and RP combinations can be precisely adjusted to ensure drilling velocity consistently meets or exceeds the 110 m/h target across various rock layers.
Kajian Teknis Umur Pakai Mata Bor Menggunakan Metode Galle and Woods pada Batuan Sedimen Aullia Bintang Jaladri; Bagus Wiyono; Wirawan Nurcahyo Utomo
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 3 (2026): August (Inpres)
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i3.2283

Abstract

The operational efficiency of coal drilling at Pit Bendili, PT Kaltim Prima Coal, is directly influenced by drill bit life. This study aims to evaluate technical drilling parameters to achieve a target bit lifespan of 10.800 m using the Galle and Woods theoretical method. Evaluated parameters include Weight on Bit (WOB) and Rotational Speed (RPM) from a Sandvik D55SP drill rig (unit D162) operating in soft to very soft formations with Uniaxial Compressive Strength (UCS) values ranging from 14,14 MPa to 17,73 MPa. The Galle and Woods method mathematically models tooth and bearing wear rates to predict optimum bit replacement intervals. Results indicate that mitigating bit balling while achieving the cumulative 10.800 m target requires maintaining the pipe rotation speed constant at its maximum limit of 187 RPM and optimizing WOB within safe Sandvik operational thresholds. This parameter combination maximizes the penetration rate while minimizing premature component failure.
Co-Authors Bagus Wiyono Hakim Erlangga Bernado Sakti Singgih Saptono Tedy Agung Cahyadi Wirawan Nurcahyo Utomo