Analisis Mine Dewatering pada Penambangan Nikel PT Makmur Lestari Primatama Kecamatan Langgikima Kabupaten Konawe Utara Provinsi Sulawesi Tenggara

Al’Faizah ma'rief; Harwan; Sri Widodo

doi:10.58227/jmi.v1i4.252

Authors

Al’Faizah ma'rief universitas bosowa
Harwan Universitas Muslim Indonesia
Sri Widodo

DOI:

https://doi.org/10.58227/jmi.v1i4.252

Keywords:

Sump, Runnoff Water, Precipitation, Pump, Mine Dewatering

Abstract

The problem that is often faced in mining activities in open pit mines is high rainfall that can hamper mining operations. Mine Dewatering is a handling of mine water problems by removing water that has entered the mining area (by utilizing differences in height and gravitational force) through drainage channels to temporary storage ponds (sump). This system is commonly applied for handling runoff from rainwater. The purpose of this study is to find out the volume of water entering the mining front, analyze the ideal sump volume to hold runoff water and analyze the ability and duration of pumping to slice water that is in the sump. The average rainfall obtained from data for 2019-2022 is 81 mm/day. The calculation of planned rainfall is determined using a gumble distribution, the calculation of planned rainfall based on the repeat period over 2 years is 201,658 mm/day. Based on the results of the study, the average rain time was 11.97 hours, rainfall intensity was 6,572 mm/hour, runoff coefficient was 0.9 and the rain catchment area was 692,000 m2. So that the runoff water discharge that enters the sump is 4,093.04 m3/hour, the total volume of water entering the sump is 98,233 m3/day. The ideal sump volume to hold runoff water is 71,813.36 m3. The pumping discharge is 1,841.62 m3/hour, the length of sump drying time with an estimated pumping time of 20 hours/day is 9 days.

References

Asdak, C., (2010). Hidrologi dan Pengelolaan Daerah Aliran Sungai. Yogyakarta: Gadjah Mada University Press.

Gautama, R. S. (2019). Sistem Penyaliran Tambang. Institut Teknologi Bandung: Bandung.

Gultom, R.(2018). Evaluasi Kapasitas Pemompaan Dalam Sistem Penyaliran Pada Pit 1 Timur Penambangan Banko Barat PT. Bukit Asam (Persero) Tbk Tanjung Enim Sumatera Selatan. Jurnal Pertambangan, Vol. 2, No. 1. Hal. 1-8.

Hanafi. (1988). Klimatologi. Fakultas Pertanian Universitas Padjadjaran: Bandung.

Hermawan, Budi, A. (2011). Rancangan Sistem Penyaliran Tambang Batubara di Sub Blok 4I dan 4III PT. Antang Gunung Meratus Provinsi Kalimantan Selatan. Laporan Penelitian: ITB.

Listiyani, N. (2017). Dampak Pertambangan Terhadap Lingkungan Hidup di Kalimantan Selatan dan Implikasinya Bagi Hak-hak Warga Negara. Al-Adl: Jurnal Hukum. Vol. 9, No. 1, Hal. 67-85.

Prabowo, H. (2020). Menghitung Debit Air Limpasan di Pit Bukit Everest PT. Antam Tbk UBPN Sulawesi Tenggara. Bina Tambang, 5(3), 71-77.

Samosir. (2021). Evaluasi Unit Pompa Terhadap Volume Air dan Target Pemompaan Sump Pit III Timur Banko Barat PT Bukit Asam Tbk Tanjung Enim Kabupaten Muara Enim Provinsi Sumatera Selatan. Jurnal Teknik Pertambangan, Vol. 21, No. 2, Hal. 101–106.

Sepriadi, S. dan Sudarman, S. (2018) Analisis Kebutuhan Pompa Untuk Mine Dewatering Kuartal III Sump Pit 1 Utara, Banko Barat, PT Satria Bahana Sarana Tanjung Enim, Propinsi Sumatera Selatan. Jurnal Teknik Patra Akademika, 9(01), 91-100.

Suwandhi, A. (2004). Perencanaan Sistem Penyaliran Tambang. Universitas Islam Bandung: Bandung.

Syarifuddin. (2017) Kajian Sistem Penyaliran Pada Tambang Terbuka Kabupaten Tanah Bumbu Provinsi Kalimantan Selatan. Jurnal Geomine. Vol. 5, No.2. Hal. 84- 89.

Triatmadja, R. (2006) Draft jaringan air bersih. Yogyakarta: Beta Offset.

Utama, A. G. (2016) Kajian Kerapatan Sungai Dan Indeks Penutupan Lahan Sungai Menggunakan Penginderaan Jauh (Studi Kasus: DAS Juana). Jurnal Geodesi. Undip, 5(1), 285-293.

Zaidan, M., dan Garinas, W. (2021) Kajian Bahan Baku Mineral Nikel Untuk Baterai Listrik di Daerah Sulawesi Tenggara. Jurnal Rekayasa Pertambangan, 1(1).