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All Journal International Journal of Engineering, Science and Information Technology Journal Transformation of Mandalika JURNAL TEKNOLOGI MINERAL FT UNMUL
Rety Winonazada
Universitas Mulawarman
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Penentuan kedalaman zona degradasi pada lereng highwall di PT putra karya borneo Natasya Amanda Putri; Tommy Trides; Revia Oktaviani; Albertus Juvensius Pontus; Rety Winonazada
Journal Transformation of Mandalika, e-ISSN: 2745-5882, p-ISSN: 2962-2956 Vol. 7 No. 5 (2026): Mei
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/jtm.v7i5.6331

Abstract

lope stability in open-pit mining is a critical aspect influenced by the geotechnical conditions of slope-forming materials, particularly the presence of a degradation zone. This study aims to determine the depth of the degradation zone or Fully Disturbed Limit (FDL) and to analyze its role in the stability of the highwall slope at Pit North, PT Karya Putra Borneo. The research employs a quantitative approach using secondary data, including slope geometry and geotechnical parameters, combined with slope modeling using Slide 6.0 software. The depth of the degradation zone is determined based on a disturbance factor (D) value of 0.7, representing mechanical excavation methods. The results indicate that the degradation zone extends to a depth of approximately 3.9 meters from the slope surface, forming a relatively weaker layer compared to the underlying material. This zone has the potential to act as a weak plane that controls slope failure mechanisms. Therefore, the depth and position of the degradation zone are key factors that must be considered in slope stability analysis to support safer and more effective slope design in open-pit mining.
The Role of the Mining Sector in Regional Economic Development: A Case Study of East Kutai Regency Ardhan Ismail; Dea Mierela Ananda; Agus Winarno; Revia Oktaviani; Arif Setiawan; Rety Winonazada; Supriyanto Supriyanto
International Journal of Engineering, Science and Information Technology Vol 5, No 4 (2025)
Publisher : Malikussaleh University, Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52088/ijesty.v5i4.1765

Abstract

This study examines the role of the mining sector in East Kutai Regency's regional economic development, where mining contributes over 40% to GRDP. An integrated analytical framework combining Input-Output analysis with overlay analysis techniques (Location Quotient, Klassen Typology, and Shift-Share) was employed to comprehensively assess the mining sector's structural position, inter-sectoral linkages, and development impact. The Input-Output analysis utilized East Kalimantan's 2016 table updated via RAS method to generate regency specific coefficients, while overlay analysis employed GRDP statistics for 2014 to 2023 to evaluate spatial concentration and competitive dynamics. Input-Output findings reveal the mining sector exhibits weak backward linkage of 1.0 and forward linkage of 0.95, positioning it in Quadrant III with minimal inter-sectoral integration and limited multiplier effects on the regional production system. Overlay analysis through Location Quotient demonstrates the mining sector's highest comparative advantage at 1.76, indicating strong export orientation and spatial concentration. However, Klassen Typology classifies it in Quadrant IV as a lagging sector with growth coefficient of 0.94 and contribution coefficient of 0.93, reflecting stagnant development performance. Shift-Share analysis within the overlay framework confirms the mining sector's severe competitiveness decline at negative 35,714.67, the worst among seventeen evaluated sectors. The convergent results from Input-Output and overlay analyses indicate the mining sector operates as an extractive enclave with insufficient value-added generation and constrained developmental spillovers. Enhancing the mining sector's developmental role requires strengthening backward and forward linkages through downstream processing facilities, local content requirements, and technology transfer mechanisms to transform the sector from an extractive enclave into an integrated regional growth driver.
Analisis Produktivitas Alat Angkut Dump Truck Liugong DW90A dan Hino 500 pada Product Coal Stockpile PT. Victor Dua Tiga Mega Site Luwe Hulu Kab. Barito Utara Prov. Kalimantan Tengah Gokma Rohartama Gultom; Agus Winarno; Rety Winonazada; Windhu Nugroho; Henny Magdalena
JURNAL TEKNOLOGI MINERAL FT UNMUL Vol 14, No 1 (2026): Jurnal Teknologi Mineral FT UNMUL Juni 2026
Publisher : Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jtm.v14i1.26988

Abstract

Produktivitas alat angkut adalah besarnya produksi yang dapat dicapai dalam kenyataan kerja alat angkut berdasarkan kondisi yang dicapai saat ini. Ada beberapa faktor yang menyebabkan tidak tercapainya target produksi batubara diantaranya alat angkut tidak dalam kondisi baru sehingga sering mengalami breakdown dan perbaikan ditengah kegiatan produksi yang sedang berlangsung. Selain itu hal ini juga disebabkan oleh beberapa faktor seperti ketidakserasian kerja alat angkut, waktu kerja kerja yang tidak optimal dan efisiensi kerja alat mekanis. Metode yang digunakan dalam penulisan yaitu dengan pendekatan masalah yang berupa pengambilan bahan, baik berupa dasar teori maupun data-data objek yang diamati secara langsung dilapangan. Sehingga dilakukan dalam beberapa tahapan yang meliputi tahap pra lapangan, tahap lapangan, dan tahap pasca lapangan.Berdasarkan analisis yang dilakukan maka diperoleh produktivitas teoritis, alat angkut jenis Hino 500 dan Liugong secara berturut turut adalah 21 m3/Jam dan 25 m3/Jam. Produktivitas aktual alat angkut Hino 500 dan Liugong secara berturut turut adalah 5 m3/Jam dan 7 m3/Jam.
Co-Authors Agus Winarno Albertus Juvensius Pontus Ardhan Ismail Arif Setiawan Dea Mierela Ananda Gokma Rohartama Gultom Henny Magdalena Natasya Amanda Putri Revia Oktaviani Supriyanto Supriyanto Tommy Trides Windhu Nugroho windhu