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All Journal Dewantara Journal of Technology International Journal of Engineering, Science and Information Technology INTAN Jurnal Penelitian Tambang Jurnal Teknologi Sumberdaya Mineral
Winonazada, Rety
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EVALUATION OF MINE SUMP AT PT. BERKAT ANUGERAH SEJAHTERA, PT. ANTANG GUNUNG MERATUS SITE, SOUTH KALIMANTAN: EVALUASI MINE SUMP PADA PT. BERKAT ANUGERAH SEJAHTERA SITE PT. ANTANG GUNUNG MERATUS KALIMANTAN SELATAN Ismail, Ardhan; Winonazada, Rety; Pontus, Albertus
INTAN Jurnal Penelitian Tambang Vol. 7 No. 2 (2024): INTAN: Jurnal Penelitian Tambang
Publisher : Jurusan Teknik Pertambangan Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56139/intan.v7i2.276

Abstract

PT. Berkat Anugerah Sejahtera (PT. BAS) is one of the mining contractors operating at PT. Antang Gunung Meratus in South Kalimantan. In its operations, one of the main challenges is the entry of water into the mining pit and managing surface runoff that flows into the mining front. The water entering the pit needs to be properly managed so it can be controlled and concentrated at a single point, referred to as the lowest point. This water management is carried out by constructing a sump or a collection point at the lowest location. The purpose of this study is to understand the dewatering process and measure the runoff volume entering the mine, assess the actual sump capacity, and evaluate the efficiency of the pumping system. Data collection was conducted to compare the planned sump capacity with the actual sump capacity in the field. Rainfall data from the past 10 years were analyzed to determine rainfall intensity and calculate the catchment area of PT. BAS, which spans 121.18 hectares. From this, the runoff volume was calculated to be 25,230.53 m³/day. The study found that the actual sump capacity is 32,215 m³. However, this capacity is likely insufficient to accommodate the total runoff volume entering the mine, suggesting the need for further evaluation of the current sump capacity to improve water management efficiency at the mining site.
The Analisis Pengaruh Temperatur Air Pada Siklus Pengujian Slake Durability Terhadap Ketahanan dan Ukuran Butir Batuan Daerah Kutai Kartanegara Widzar, Moh. Widzar Fahmi; Oktaviani, Revia; Winonazada, Rety; Trides, Tommy; Pontus, Albertus Juvensius
Dewantara Journal of Technology Vol. 5 No. 2 (2025): Dewantara Journal of Technology Volume 5 Nomor 2
Publisher : Akademi Teknologi Industri Dewantara Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59563/djtech.v5i2.301

Abstract

Menurut Franklin dan Chandra (1972) uji slake durability mampu memberikan gambaran mengenai tingkat kerusakan yang dialami batuan akibat siklus pengeringan dan pembasahan. Temperatur air merupakan salah satu variabel penting terhadap hasil uji slake durability, peningkatan temperatur air dapat mempercepat laju reaksi kimia dan fisik yang terjadi pada batuan selama proses pelapukan. Oleh karena itu, penelitian ini berupaya untuk menganalisis ketahanan dan pengaruh temperatur air pada siklus pengujian slake durability, batulempung dan batulanau dipilih karena memiliki ukuran butir yang berbeda yang nantinya akan dilakukan pengujian ukuran butir untuk mengetahui dominasi material dari setiap lokasi penelitian. Berdasarkan hasil penenlitian didapatkan hasil pengaruh index durability (Id2) terhadap temperatur air didapatkan pada sampel batulanau formasi Balikpapan pengaruh temperatur air sangat kuat dengan nilai (R2) 0.9998, formasi Pulau Balang pengaruh temperatur air kuat dengan nilai (R2) 0.9879, sedangkan sampel batulempung formasi Balikpapan pengaruh temperatur air cukup kuat dengan nilai (R2) 0,791, formasi Pulau Balang pengaruh temperatur air sangat kuat dengan nilai (R2) 0.9659. Untuk dominasi material pada lokasi penelitian didapatkan sampel batulanau formasi Balikpapan sebesar 60,17%, formasi Pulau Balang sebesar 61, 06% sedangkan sampel batulempung formasi Balikpapan sebesar 54,51%, dan formasi Pulau Balang sebesar 61,87%.
Pengaruh Pelapukan Berdasarkan Nilai Indeks Durability Terhadap Stabilitas Lereng: Studi Kasus Lereng Jalan Jalur Lintas Selatan Segment Legundi – Planjan, Gunungkidul, Yogyakarta Winonazada, Rety; Ardhan Ismail
JENERAL Vol. 6 No. 2 (2025)
Publisher : JENERAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jeneral.v6i2.60001

Abstract

Pembangunan Jalan Jalur Lintas Selatan (JJLS) di Gunungkidul memotong formasi batugamping dengan geometri lereng tinggi dan curam yang berpotensi mengalami ketidakstabilan akibat proses pelapukan. Penelitian ini bertujuan mengetahui pengaruh tingkat pelapukan terhadap stabilitas lereng menggunakan pendekatan nilai indeks durabilitas. Metode penelitian meliputi pengujian laboratorium untuk menentukan sifat fisik dan mekanik batuan (kuat tekan uniaksial dan kuat geser), uji slake durability berdasarkan standar ISRM untuk klasifikasi tingkat pelapukan, serta pemodelan numerik metode elemen hingga menggunakan Rocscience RS2 untuk analisis stabilitas. Hasil menunjukkan sampel batugamping dari STA 0+700 dan STA 3+800 termasuk kelas pelapukan II (slightly weathered) dengan indeks durabilitas 96,18-96,75%. Nilai SRF bervariasi: STA 0+700 sebesar 4,62; STA 3+800A sebesar 2,14; dan STA 3+800B sebesar 3,46. Penurunan nilai indeks durabilitas menyebabkan penurunan nilai SRF, menunjukkan bahwa pelapukan mempengaruhi stabilitas lereng batugamping. Selain itu kestabilan lereng juga dipengaruhi oleh parameter kuat geser efektif dan kondisi massa batuan, sehingga penilaian kestabilan lereng menggunakan pendekatan indeks durabilitas perlu dianalisis bersama hasil uji mekanik dan model numerik.
The Role of the Mining Sector in Regional Economic Development: A Case Study of East Kutai Regency Ismail, Ardhan; Ananda, Dea Mierela; Winarno, Agus; Oktaviani, Revia; Setiawan, Arif; Winonazada, Rety; 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.
Co-Authors Agus Winarno, Agus Ananda, Dea Mierela Ardhan Ismail Arif Setiawan Pontus, Albertus Pontus, Albertus Juvensius Revia Oktaviani Supriyanto Supriyanto Trides, Tommy Widzar, Moh. Widzar Fahmi