RANCANGAN TEKNIS SISTEM PENYALIRAN PADA KOLAM PENGENDAPAN (SETTLING POND) DI PIT DURIAN PT. J RESOURCES BOLAANG MONGONDOW SITE BAKAN, SULAWESI UTARA

  • Regita Cahyani Surahmad Insitut Teknologi Nasional Yogyakarta

Abstract

ABSTRACT

PT. J Resources Bolaang Mongondow (PT. JRBM) is one of the gold mining companies that implements an open pit mining system (surface mining) with the open pit method. The mining operation area is located at the Bakan Site, namely in Bakan Village, Lolayan District, Bolaang Mongondow Regency, North Sulawesi Province. The series of mining operations starts from overburden stripping, drilling, blasting, loading, and transporting. With the mining activities carried out by PT. J Resources Bolaang Mongondow (PT. JRBM) will have an impact on environmental quality, especially on water quality. Due to the wide range of problems and benefits of water, water management is important in the mining industry. So that a mine drainage system method is used for handling water that will pollute rivers, lakes, and the surrounding environment by making a settling pond. Settling pond function to deposit mud or other materials so that the water flowing from the settling ponds to the river is clear, besides that this is also intended to prevent silting of the river. Settling pond can also function as a place to control the quality of the water that will flow out of the settling pond. The design of the settling pond that will be made is based on the total flow of water entering the settling pond, which is 3,784 m3/second with each amount of incoming water consisting of a runoff water discharge of 3,78 m3/second and the rainwater discharge is 0,0048 m3/second. Settling pond are designed to be in the shape of a truncated pyramid and made zigzag. The designed settling pond consists of 5 compartments with dimensions of 6.045 m2, depth 7 m, pool slope 60˚, top width 21 m, top length 39 m, bottom width 13 m, bottom length 30 m, and the total volume of the pond. the design is 20.700 m3 with the volume of each compartment of 4.140 m3. As well as the sedimentation pond that is designed also consists of 4 pieces of insulation with a width of 7 m and a length of 14 m. From the dimensions of the designed settling pond of 20.700 m3, it can accommodate the incoming water volume of 20.331 m3 for 89,55 minutes. The settling pond must be maintained so that it can function properly and for a long time, namely by cleaning the settling pond from solid material that settles to the bottom of the pond using a 390D L paint excavator. For each compartment of the settling pond has a different maintenance time in each compartment. i.e. in compartment 1 maintenance can be carried out once every 7 days, compartment 2 is carried out once every 68 days, compartment 3 is carried out once every 586 days, compartment 4 is carried out once every 4.140 days or ±11 years, and compartment 5 is carried out once every 37.636 days or ±103 years, but in compartment 5 there is no need for maintenance because it has passed the mine life limit at the company.

Keywords : Pond, Sediment, Discharge, Dimensions, Maintenance.

References

Alviansyah, N., 2019, “Perencanaan Desain Kolam Pengendapan Pada Bukit 7 PT. ANTAM Tbk UBP Bauksit, Tayan, Kabupaten Sanggau, Provinsi Kalimantan Barat”, Program Studi Teknik Pertambangan, Fakultas Sains dan Teknologi UIN Syarif Hidayatullah Jakarta.
Chow, V.T., 1985, “Hidrolika Saluran Terbuka” (Bahasa Indonesia), Erlangga, Jakarta, Indonesia.
Gautama, R.S., 1994, “Diktat Kuliah Sistem Penyaliran Tambang”, Jurusan Teknik Pertambangan Fakultas Teknologi Mineral ITB, Pengantar Penyaliran Tambang.
Giancoli D.C., 2001, “Fisika Prinsip dan Aplikasi”, Jilid ke-1 Edisi ke-5, Diterjemahkan Oleh Yuhilza Hanum, Erlangga, Jakarta.
Hardjana, I., 2012, “The Descovery, Geology and Exploration of The High Sulphidation Au-Mineralization System in The Bakan District”, Majalah Geologi Indonesia Vol. 27, North Sulawesi.
Hartono, 2013, “Kuliah Sistem Penyaliran Tambang Kolam Pengendapan”, Program Studi Teknik Pertambangan, Fakultas Teknologi Mineral, UPN “Veteran” Yogyakarta.
Husain, A.A., lecture: Thamrin, M., 2016, “Desain Kolam Pengendapan (settling pond)”, Rekayasa Lingkungan Tambang, Student of Mining Engineering, Hasanuddin University.
Indonesianto, Y., 2018, “Pemindahan Tanah Mekanis”, Jurusan Teknik Pertambangan, Sekolah Tinggi Teknologi Nasional Yogyakarta.
Ipi, J.V., 2020, “Rancangan Dimensi Settling Pond Untuk Pit Warute Tambang Batubara PT. Bina Sarana Sukses Site Operation PT. Antang Gunung Meratus Provinsi Kalimantan Selatan”, Program Studi Teknik Pertambangan, Institut Teknologi Nasional Yogyakarta.
J Resources., 2015, “Annual Report PT J Resources Asia Pasifik, Tbk”.
J Resources., 2019, “Tipe Endapan Daerah Bakan”, Mine Geology Department, PT. J Resources Bolaang Mongondow.
J Resources., 2019, “Laporan Pemantauan Curah Hujan Triwulan IV 2019”, Mining Engineering Department, PT. J Resources Bolaang Mongondow.
J Resources., 2020, “Laporan Pemantauan Kualitas Air Limbah di Titik Penaatan”, EHS Department, PT. J Resources Bolaang Mongondow.
Kurnia, D., 2018, “Evaluasi Kondisi Aktual dan Perencanaan Sistem Penyaliran Tambang Emas di Pit Durian, Site Bakan PT. J Resources Bolaang Mongondow, Kecamatan Lolayan, Kotamobagu, Sulawesi Utara”, Program Studi S1 Teknik Pertambangan, Fakultas Teknik, Universitas Negeri Padang.
Linsley, R.K., Kohler, M.A., Paulhus J.L.H., 1975, “Hidrology For Engineers”, McGraw Hill Series in Water Resources and Environmental Engineering, New York.
Fuerstenau, M.C., dan Han, K.N., 2003, “Principles of Mineral Processing, Society for Mining Metallurgy and Exploration”, Colorado.
Pangestu, W.A., 2019, “Analisa Perancangan Kolam Pengendapan di PT. Gunung Mas, Tbk”, Program Studi Teknik Pertambangan, Sekolah Tinggi Teknologi Nasional Yogyakarta.
Pearson, D.F., dan Caira, N.M., 1999, “Geology and Metallogency of Central North Sulawesi, Indonesia”, Manuscript for PACRIM, Australian Institute of Mining and Metallurgy.
Prasetyo, E.E.E., 2012, “Rancangan Dimensi Settling Pond Berdasarkan Daerah Tangkapan Hujan Pada Pit B2A PT. Sebuku Batubai Coal Pulau Laut Tengah Kotabaru Kalimantan Selatan”, Prodi Teknik Pertambangan, UPN “Veteran” Yogyakarta.
Prodjosumarto, P., 2000, “Pemindahan Tanah Mekanis”, Jurusan Teknik Pertambangan, Fakultas Teknologi Mineral, Institut Teknologi Bandung.
Soemarto, C.D., 1999, “Hidrologi Teknik”, Penerbit Erlangga, Jakarta, Indonesia.
Suhariyanto, P.D.A., 2015, “Kajian Dimensi Penyaliran Pada Tambang Terbuka PT. Baturona Adimulya Kabupaten Musi Banyuasin Propinsi Sumatera Selatan”, Program Studi Teknik Pertambangan Fakultas Teknik, Universitas Kutai Kartanegara.
Sutardji, 2016., “Diktat Kuliah Geologi Indonesia”, Semarang, Tidak diterbitkan.
Tenriajeng, A.T., 2003, “Pemindahan Tanah Mekanis”, Gunadarma, Jakarta.
Triatmodjo, B., 2008, “Hidrologi Terapan”, Teknik Sipil, Universitas Gadjah Mada.
Van Leeuwen, T.M., and Muhardjo, 2005, “Stratigraphy and tectonic setting of the Cretaceous and Paleogene volcanic–sedimentary successions in northwest Sulawesi, Indonesia implications for the Cenozoic evolution of Western and Northern Sulawesi”, Journal of Asian Earth Sciences.
Van Zyl, D.J.A., 1988, “Introduction to Evaluation, Design and Operation of Precious Metal Heap Leaching Projects”, Cushing-Malloy, Inc., Ann Arbor, Michigan.
White, N.C., dan Hedenquist, J.W., 1995, “Epithermal Gold Deposits : Style, Characteristics and Exploration”, Society of Econimic Geologist.
Wolley, L., 2009, “Sanitatin Details”, U.S.A: International Thomsom Publishing.
........, 2019, Arsip Engineering Department PT. J Resources Bolaang Mongondow, Sulawesi Utara.
Published
2021-11-09