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All Journal INTAN Jurnal Penelitian Tambang Jurnal Teknologi Sumberdaya Mineral
Winonazada, Rety
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Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Energy Engineering

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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.
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
Jurnal Teknologi Sumberdaya Mineral (JENERAL) Vol. 6 No. 2 (2025)
Publisher : Program Studi Teknik Pertambangan Fakultas Teknik Universitas Jember

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.
Co-Authors Ardhan Ismail Pontus, Albertus