Garuda - Garba Rujukan Digital

Rock Formation Acid Mine Drainage in Epithermal Gold Mineralization, Pandeglang, Banten Province Dudi Nasrudin Usman; Sri Widayati; Sriyanti Sriyanti; Era Setiawan
Journal of Geoscience, Engineering, Environment, and Technology Vol. 4 No. 4 (2019): JGEET Vol 04 No 04: December 2019
Publisher : UIR PRESS

Mine acid water is acidic water and contains iron and sulfate, which is formed under natural conditions when geological strata containing pyrites are exposed to an oxidizing atmosphere or environment. One of the impacts of the mineralization zone where there is a mining process is the potential for the formation of acid mine drainage, especially in the Cibaliung gold mineralization area and its surroundings, Pandeglang Regency, Banten Province. Acid-forming sulfide minerals include pyrite (FeS2), headquarters (FeS2), picoliters (FexSx), calcocytes (CuS), covellite (CuS), chalcopyrite (CuFeS2), molybdenite (MoS), mulenite (NiS), chalocytes (CuS), covellite (CuS), chalcopyrite (CuFeS2), molybdenite (MoS), mulenite (NiS), chalocytes (CuS), covellite (CuS), chalcopyrite (CuFeS2), molybdenite (MoS), mulenite (NiS), galena (PbS) ) and sphalerite (ZnS). Of all these minerals, pyrite is the most dominant sulfide in acid formation. Alkaline mine water (alkaline mine drainage) is mine water that has an acidity level (pH) of 6 or more, containing alkalinity but still containing dissolved metals that can produce acids. The quality of mine water, acid or alkali, depends on the presence or absence of acid mineral content (sulfides) and alkaline materials in the geological strata. Acid water formation tends to be more intensive in mining areas. This can be prevented by avoiding exposure to sulfide-containing materials in the free air. Acid-forming sulfide minerals include pyrite (FeS2), headquarters (FeS2), picoliters (FexSx), calcocytes (CuS), covellite (CuS), chalcopyrite (CuFeS2), molybdenite (MoS), mulenite (NiS), chalocytes (CuS), covellite (CuS), chalcopyrite (CuFeS2), molybdenite (MoS), mulenite (NiS), chalocytes (CuS), covellite (CuS), chalcopyrite (CuFeS2), molybdenite (MoS), mulenite (NiS), galena (PbS) ) and sphalerite (ZnS). Of all these minerals, pyrite is the most dominant sulfide in acid formation. Formation of potential acidic water also occurs in tailings which are residues/processing residues containing sulfide minerals. The formation of acid mine drainage does not always develop in every sulfide-ore mining. In certain types of ore deposits, there are neutralizing agents which prevent the formation of acid mine drainage.

Pengembangan Wilayah untuk Pembangunan Daerah Pangalengan Kabupaten Bandung Berbasis pada Satuan Genetik Wilayah Geologi dan Kebencanaan Dudi Nasrudin Usman; Sri Widayati; Sriyanti Sriyanti
PROMINE Vol 5 No 2 (2017): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Unit of Area Genetics (SGW) as one of the methods in considering geological aspects for geologicarea-based development. The geological condition as part of the natural movement in a particularcondition makes it possible to predict its effect on the movement of an area in particular with regard tonatural disasters. Pangalengan who has a million beautiful natural charm, especially from the point ofpan-dang geology need it to be studied based on geological data. The charm is the presence of activevolcanoes in the region such as Mount Malabar, Mount Wayang, Mount Windu and others. In addition,the morphology of Pangalengan is relatively well represented in the highlands, hills and mountainareas as part of Java's tectonic activity. Another evidence of such activity is the existence of fault linesin the Pan-galengan mountains of Southeast-Northwest. Pangalengan who has a million beautifulnatural charm, especially from the point of pan-dang geology need it to be studied based on geologicaldata. The charm is the presence of active volcanoes in the region such as Mount Malabar, MountWayang, Mount Windu and others. In addition, the morphology of Pangalengan is relatively wellrepresented in the highlands, hills and mountain areas as part of Java's tectonic activity. Anotherevidence of such activity is the existence of fault lines in the Pan-galengan mountains of Southeast-Northwest.

Karakteristik Endapan Tras Nagreg untuk Menudukung Pemberdayaan Perekonomian Masyarakat Lokal, Desa Nagreg Kendan, Kecamatan Nagreg, Kabupaten Bandung Sri Widayati; Dudi nasrudin usman; Sriyanti Sriyanti; Linda Pulungan; Dono Guntoro
PROMINE Vol 5 No 2 (2017): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Characteristics of sediment Tras Nagreg as part of the volcanic process in the region provides anopportunity and potential to be utilized through mining activities. Mining activities, as a capitalintensive,labor-intensive and risk-filled industry, do not always have a negative impact on thesurrounding community, there is something to do with the economic aspects in which all types ofmineral deposits have economic value including tras. Nagreg Kendan Village, Nagreg Subdistrict aspart of Bandung Regency which has tras sediment potential, where in quality and quantity, trassediment in the area has big enough potency to be utilized especially to improve prosperity of localcommunity. Currently, the number of people with productive age is quite a lot, which becomes thecapital for the management of tras going forward, another thing to consider is the existence of thelocation not far from the access road that connects Bandung - Garut, Bandung - Cianjur and Bandung- Jakarta.

Peningkatan Kompetensi Masyarakat Lokal dalam Pemanfaatan Endapan Tras Di Daerah Nagreg Kendan, Kabupaten Bandung, Jawa Barat Sri Widayati; Dudi nasrudin Usman; Sriyanti Sriyanti; HimawaN Nuryahya; Ike J. Triwardhani
PROMINE Vol 7 No 2 (2019): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v7i2.1644

Competency enhancement in trass utilization was given to local communities of Nagreg Kendan,Bandung, West Java. This activity was intended to explore the potential of local cummunity indeveloping trass deposit utilization for local economy. This activity is expected to providerecommendation and encouragement for local community to develop entrepreneurship in utilizing andmanaging mineral resources potential. This activity was divided into several parts, they are pre-test,counseling and discussion about trass utilization, and also post-test to evaluate local community’sbasic knowledge. Local community shows good knowledge and enthusiasm of local community indeveloping local economy through trass utilization.

Rencana Teknis dan Ekonomis Reklamasi Tambang di PT. X Baleendah Siti Nurul Khotimah; Sri Widayati
Jurnal Riset Teknik Pertambangan Volume 2, No. 1, Juli 2022, Jurnal Riset Teknik Pertambangan (JRTP)
Publisher : UPT Publikasi Ilmiah Unisba

Abstract. Mining activities are closely related to environmental changes. Mining activities can also have an impact on the social and economic sphere of the local area. So mining companies are expected to be able to restore the impactful environment into a productive environment for the community. In tackling the impact of environmental changes, what has been prepared in detail is carried out. Minister of Energy and Mineral Resources Regulation No. 07 of 2020 as the holder of a Mining Business Permit (IUP) ensures reclamation guarantees and is based on post-mining guarantees in accordance with the determination of the Minister or Governor. The criteria for successful reclamation include land use, topsoil distribution, erosion control, and revegetation. In carrying out ex-mining land reclamation activities, it is carried out to find out the annual mine area plan, concepts and plans for land use and revegetation. Then the tools used in carrying out mine reclamation activities and estimates of the reclamation costs that will be found by the company. The area of land that will be reclaimed at PT X in the first period is 1.33 Ha. The area each year is in the 2nd year to the 4th year which is 0.26 Ha, while the 5th year is 0.53 Ha. The division of this area is based on the progress achieved. The estimated reclamation costs that will be incurred during the reclamation activities are Rp. 216,724,645.55. Abstrak. Kegiatan pertambangan erat kaitannya dengan merubah lingkungan. Kegiatan pertambangan juga dapat memberikan dampak pada lingkup sosial dan ekonomi daerah setempat. Maka perusahaan tambang diharapkan dapat mengembalikan lingkungan yang berdampak menjadi lingkungan yang produktif bagi masyarakat. Dalam menanggulangi dampak perubahan lingkungan tersebut dilakukan kegiatan reklamasi yang telah tersusun secara terperinci. Berdasarkan Peraturan Menteri ESDM No. 07 tahun 2020 sebagai pemegang Izin Usaha Pertambangan (IUP) diwajibkan menempatkan jaminan reklamasi dan jaminan pascatambang yang sesuai dengan penetapan Menteri atau Gubernur. Adapun kriteria dari keberhasilan reklamasi yang meliputi tata guna lahan, penebaran tanah pucuk, pengendalian erosi, revegetasi. Dalam melakukan kegiatan reklamasi lahan bekas tambang dilakukan untuk mengetahui rencana luasan tambang secara pertahun, konsep dan rencana pada penatagunaan lahan dan revegetasi. Lalu alat-alat yang digunakan dalam melakukan kegiatan reklamasi tambang dan estimasi pada biaya reklamasi yang akan dibayarkan oleh perusahaan. Luas lahan yang akan direklamasi di PT X pada periode pertama yaitu 1,33 Ha. Adapun luasan setiap tahunnya yaitu pada tahun ke 2 sampai dengan tahun ke 4 yaitu 0,26 Ha, sedangkan tahun ke 5 yaitu 0, 53 Ha. Pembagian luasan ini didasarkan pada kemajuan tambang. Estimasi biaya reklamasi yang akan dikeluarkan selama kegiatan reklamasi yaitu sebesar Rp. 216.724.645,55.

Optimasi Pencampuran Batubara Dalam Upaya Meningkatkan Kualitas di PT Bukit Asam, Tbk. Tanjung Enim, Sumatera Selatan Alditiya Nurrosyidi; Solihin; Sri Widayati
Bandung Conference Series: Mining Engineering Vol. 3 No. 1 (2023): Bandung Conference Series: Mining Engineering
Publisher : UNISBA Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/bcsme.v3i1.5633

Abstract. PT Bukit Asam, Tbk. is a coal commodity mining industry company located in Lawang Kidul District, Muara Enim Regency, South Sumatra Province. Data collection of coal products resulting from mining called mine brand. Mining is carried out from the Air Laya Mine pit (TAL), Muara Tiga Besar pit (MTB), and Bangko pit which produces 16 Mine brands namely AL 49, AL 51, AL 53, AL 55, AL 59, AL 61, AL 63, AL 65, AL 67HV, AL 71MV, AL 69HV, AL 71LV, BB 47, BB 51, BB 53, and MT 47. Mine brands must meet market brand criteria according to consumer needs. In May 2022, consumer demand for market brand BA 48 was 538,231 tons with criteria of total moisture ≤ 30%, ash content ≤ 8%, and calorific value ≥ 4,800 kcal/kg, and market brand BA 50 was 311,814 tons with criteria of total moisture ≤ 28%, ash content ≤ 7%, and calorific value ≥ 5,000 kcal/kg. To meet consumer demand, it is necessary to maximize coal blending carried out by the company, so a coal blending optimization simulation is carried out using the simplex method calculation in a linear program with POM-QM For Windows software as a tool for applying the simplex method. The results of BA 48 market brand coal blending obtained a proportion of 60.73% BB 51, and 39.27% MT 47 with total moisture parameters of 29.81%, ash content of 3.14%, and calorific value of 4,800 kcal/kg, while for BA 50 market brand coal blending obtained a proportion of 52.50% AL 49 and 47.50% BB 53 with total moisture parameters of 27.75%, ash content of 2.81%, and calorific value of 5,000 kcal/kg. Abstrak. PT. Bukit Asam, Tbk. merupakan perusahaan industri pertambangan komoditas batubara berlokasi di Kecamatan Lawang Kidul, Kabupaten Muara Enim, Provinsi Sumatera Selatan. Pengambilan data produk batubara hasil dari penambangan yang disebut mine brand. Penambangan dilakukan dari pit Tambang Air Laya (TAL), pit Muara Tiga Besar (MTB), dan pit Bangko yang menghasilkan 16 Mine brand yaitu AL 49, AL 51, AL 53, AL 55, AL 59, AL 61, AL 63, AL 65, AL 67HV, AL 71MV, AL 69HV, AL 71LV, BB 47, BB 51, BB 53, dan MT 47. Mine brand harus memenuhi kriteria market brand sesuai kebutuhan konsumen. Pada bulan Mei 2022 permintaan konsumen untuk market brand BA 48 sebanyak 538.231 ton dengan kriteria total kelembaban ≤ 30%, kandungan abu ≤ 8%, dan nilai kalori ≥ 4.800 kkal/kg, dan market brand BA 50 sebanyak 311.814 ton dengan kriteria total kelembaban ≤ 28%, kandungan abu ≤ 7%, dan nilai kalori ≥ 5.000 kkal/kg. Untuk memenuhi permintaan konsumen perlu memaksimalkan pencampuran batubara yang dilakukan oleh perusahaan, maka dilakukan simulasi optimasi pencampuran batubara yang dilakukan menggunakan perhitungan metode simpleks dalam program linier dengan software POM-QM For Windows sebagai alat penerapan metode simpleks. Hasil dari pencampuran batubara market brand BA 48 mendapatkan proporsi sebesar 60,73% BB 51, dan 39,27% MT 47 dengan parameter total kelembaban 29,81%, kandungan abu 3,14%, dan nilai kalori 4.800 kkal/kg, sedangkan untuk pencampuran batubara market brand BA 50 mendapatkan proporsi sebesar 52,50% AL 49 dan 47,50% BB 53 dengan parameter total kelembaban 27,75%, kandungan abu 2,81%, dan nilai kalori 5.000 kkal/kg.

Studi Pendahuluan Pengaruh Fly Ash pada Netralisasi Air Asam Tambang di Penambangan Batubara PT XYZ, Kabupaten Kutai Kartanegara, Provinsi Kalimantan Timur Gumilar Rayana; Sri Widayati; Solihin
Bandung Conference Series: Mining Engineering Vol. 3 No. 1 (2023): Bandung Conference Series: Mining Engineering
Publisher : UNISBA Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/bcsme.v3i1.5693

Abstract. Acid mine drainage can affect water quality in the area which requires an authority to improve water quality in mining areas. So that the neutralization of acid mine drainage must be carried out, one of which is using fly ash. Fly Ash has alkaline properties with a pH value between 4.5 to 12. The pH value of fly ash is determined by the sulfur content of the coal parent material. Therefore fly ash can increase the pH value of acid mine water. The research method used in this study is the active method by mixing fly ash into the water in the settling pond which has a pH value of less than 7, it aims to neutralize the pH value in the settling pond. From the previous testing, it was found that the effect of fly ash on neutralizing acid mine drainage required a fly ash dose of 60 gr/L with a pH value of 7.57, then a linear regression calculation was performed to determine the optimal value of 58.35 gr/L for a pH value of 7. Then The dose was neutralized to acid mine drainage which has a pH value of less than 7, so that a dose value was obtained within 31 days of 632.21 gr/L or 381.532 kg/month. In addition to the effect of fly ash on the pH value, a calculation of the effect of fly ash with the same dose of neutralizing the pH value on the decrease in Fe and Mn levels was also carried out. The effect of decreasing the previous Fe content with an average value of 7.33 mg/L becomes 5.57 mg/L, and the effect of the previous Mn content with an average value of 4.32 mg/L becomes 3.56 mg/L Abstrak. Air asam tambang dapat mempengaruhi kualitas air di daerah tersebut yang membutuhkan suatu kewenangan untuk dapat memperbaiki kualitas air di daerah pertambangan. Sehingga kegiatan penetralan air asam tambang harus dilakukan salah satunya menggunakan Fly ash. Fly Ash memiliki sifat alkalin yang memiliki nilai pH antara 4,5 sampai 12. Nilai pH yang dimiliki fly ash ditentukan oleh kandungan sulfur bahan induk batubara. Oleh karena itu fly ash dapat menaikan nilai pH air asam tambang. Berdasarkan latar belakang tersebut maka penelitian ini dilakukan untuk mengetahui pengaruh penggunaan fly ash terhadap proses penetralan air asam tambang. Metode penelitian yang digunakan pada penelitian ini yaitu metode aktif dengan cara mencampurkan fly ash ke dalam air di kolam pengendapan yang memiliki nilai pH kurang dari 7, hal tersebut bertujuan untuk dapat menetralkan nilai pH di kolam pengendapan Dari pengujian yang dilakukan bahwasannya pengaruh fly ash terhadap penetralan air asam tambang dibutuhkan dosis fly ash sebesar 60 gr/L dengan nilai pH sebesar 7.57, lalu dilakukan perhitungan linier regresi untuk mengetahui nilai optimal sebesar 58.35 gr/L untuk nilai pH 7. Kemudian dosis tersebut dilakukan penetralan terhadap air asam tambang yang memiliki nilai pH kurang dari 7, sehingga didapatkan nilai dosis dalam waktu 31 hari sebesar 632.21 gr/L atau 381.532 kg/bulan. Selain pengaruh fly ash terhadap nilai pH, juga dilakukan perhitungan pengaruh fly ash dengan dosis yang sama dengan penetralan nilai pH terhadap penurunan kadar Fe dan kadar Mn. Pengaruh penurunan kadar Fe yang sebelumnya dengan nilai rata – rata 7.33 mg/L menjadi 5.56 mg/L, dan pengaruh kadar Mn yang sebelumnya dengan nilai rata – rata 4.32 mg/L menjadi 3.56 mg/L

Analisis Kebutuhan Kapur Tohor dalam Menetralkan Air Asam Tambang di PT ABC Kalimantan Timur Wahyu Guntoro; Sri Widayati; Dudi Nasrudin Usman
Bandung Conference Series: Mining Engineering Vol. 3 No. 1 (2023): Bandung Conference Series: Mining Engineering
Publisher : UNISBA Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/bcsme.v3i1.5713

Abstract. Based on the Decree of the Minister of Environment and Forestry No. 5 of 2022 concerning Wastewater Treatment for Mining Businesses or Activities related to acid mine water treatment, the water must be handled so that the water quality becomes neutral and meets the specified quality standards. The research was conducted by taking some data in the form of quality and discharge of acid mine drainage to be tested in the laboratory in order to obtain the values of pH, TSS, and chemical elements. Analysis of the calculation of the molarity of acid mine drainage and neutralizing agent (quicklime) was carried out to determine the mixing dose, which aims to neutralize acid mine water properly. Analysis results show that the actual neutralization of acid mine drainage requires 0.148 g/liter with an average daily requirement of 10.710,3535 gr or 16,551 kg. The most appropriate treatment is carried out with an active curative approach by direct sprinkling quicklime into the inlet channel so that it can be mixed more evenly when it enters the settling pond. Abstrak. Berdasarkan kepada Keputusan Menteri Lingungan Hidup dan Kehutanan No 5 Tahun 2022 tentang Pengolahan Air Limbah Bagi Usaha Dan/Atau Kegiatan Pertambangan dengan yang berkaitan dengan pengolahan air asam tambang, maka air tersebut harus dilakukan penanganan agar kualitas air menjadi netral dan memenuhi baku mutu yang telah ditentukan. Penelitian ini dilakukan dengan metode pengambilan beberapa data berupa kualitas dan debit air asam tambang untuk diuji laboratorium agar mendapatkan nilai pH, TSS, dan unsur kimiawi. Analisis perhitungan molaritas air asam tambang dan agen penetral (kapur tohor) dilakukan untuk mengetahui dosis pencampuran, yang bertujuan agar air asam tambang dapat dinetralkan dengan tepat. Hasil analisis menunjukan bahwa penetralan air asam tambang secara aktual membutuhkan 0,148 gr/liter dengan kebutuhan rata- rata perhari sebesar 169.551,242 gr atau 169,551 kg. Penanggulangan paling tepat dilakukan dengan pendekatan kuratif metode aktif, dengan cara menaburkan langsung kapur tohor ke dalam saluran inlet agar dapat tercampur lebih merata ketika masuk ke kolam pengendapan.

Studi Pendahuluan Pengelolaan Air Asam Tambang Menggunakan Karbon Aktif Fine Coal di Penambangan Batubara pada Kolam Pengendapan Kabupaten Kutai Kartanegara, Provinsi Kalimantan Timur Muhammad Aziz Rahmatullah; Sri Widayati; Solihin
Bandung Conference Series: Mining Engineering Vol. 3 No. 1 (2023): Bandung Conference Series: Mining Engineering
Publisher : UNISBA Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/bcsme.v3i1.5739

Abstract. Acid mine water is water that has a low pH (pH<5) which contains various dissolved metals such as iron (Fe), manganese (Mn), and other sulfate compounds. Acid mine water has an impact in the form of environmental pollution, so it is necessary to handle acid mine drainage using activated carbon so that it does not affect the surrounding environment. The research method used in this study is the active method by mixing activated carbon into 6 settling ponds, it aims to be able to determine the effect of activated carbon on settling ponds in the form of pH and Fe and Mn levels based on standard water quality standards.The rate of decrease in Fe metal content and Mn metal content after mixing using activated charcoal was 76,0% for Fe metal content and 18,60% for Mn metal content. The need for activated carbon for 31 days for the purpose of neutralizing acid mine water is 154790,8 kg/liter. Abstrak. Air asam tambang merupakan air yang memiliki pH rendah (pH<5) yang mengandung berbagai logam terlarut seperti besi (Fe), mangan (Mn), serta senyawa sulfat lainnya. Air asam tambang menimbulkan dampak berupa terjadinya pencemaran lingkungan sehingga perlu dilakukannya penanganan air asam tambang dengan menggunakan Karbon aktif sehingga tidak mempengaruhi lingkungan sekitar. Metode penelitian yang digunakan pada penelitian ini yaitu metode aktif dengan cara mencampurkan Karbon aktif kedalam 6 kolam pengendapan, hal tersebut bertujuan untuk dapat mengetahui pengaruh karbon aktif pada kolam pengendapan berupa pH serta kadar Fe dan Mn dengan berdasarkan standar nilai baku mutu air. Laju penurunan kadar logam Fe dan kadar logam Mn setelah pencampuran dengan menggunakan Karbon aktif yaitu sebesar 76,0% untuk kadar logam Fe dan 18,60 % untuk kadar logam Mn. Kebutuhan karbon aktif selama 31 hari untuk keperluan penetralan air asam tambang sebesar 154790,8 kg/liter.

Rencana Teknis dan Ekonomis Kegiatan Reklamasi di PT Tonia Mitra Sejahtera Site Lengora Pantai Kecamatan Kabaena Tengah, Kabupaten Bombana Provinsi Sulawesi Tenggara La Ode Hadi Irawan; Sri Widayati; Sriyanti
Bandung Conference Series: Mining Engineering Vol. 3 No. 1 (2023): Bandung Conference Series: Mining Engineering
Publisher : UNISBA Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/bcsme.v3i1.5770

Abstract. PT Tonia Mitra Sejahtera (TMS) is a company engaged in the mining sector with a commodity mineral in the form of nickel laterite which is currently mining with a planned area of 19.196 Ha. Environmental impacts that can occur such as decreased soil productivity, soil compaction, the possibility of erosion, unstable soil movement, disruption of flora and fauna, disruption of population health and so on. To overcome these various kinds of problems, it is necessary to carry out a countermeasures plan in this case in the form of reclamation. The reclamation activities are aimed at managing and improving the condition of the former mining land area into productive land. In carrying out reclamation activities on ex-mining land, it is carried out to find out concepts and plans for land use and revegetation as well as plant maintenance and care. Then estimate the costs to be incurred by the company. Reclamation activities are carried out by land use management and revegetation activities. Land use management is carried out by backfilling ex-mining land, then spread the topsoil. Revegetation activities are carried out by determining plant spacing, selecting plant species, procuring seeds and planting as well as maintenance and caring for them. The area of land to be reclaimed at PT TMS is in accordance with the planned mining area of 19,196 hectares. Land use is done by spreading a layer of cover soil and topsoil as a growing medium. Revegetation activities are carried out by determining the types of pioneer plants to be planted, namely sengon, trembesi and acacia. For inserts planted, namely local plants in the form of cashew nuts. Plantcover cropplanted are legumesMucuna Bracteata). The estimated reclamation costs to be incurred with a total area of 19.196 Ha is Rp. 6,909,020,471,- consisting of direct costs for land management of Rp. 5,823,036,665,- and revegetation costs Rp. 226,886.,651, - and indirect costs for reclamation planning costs Rp. 497,940,639, - and a supervision fee of Rp. 354,618,870,- . Abstrak. PT Tonia Mitra Sejahtera (TMS) merupakan salah satu perusahaan yang bergerak dibidang pertambangan dengan komoditas bahan galian mineral berupa nikel laterit yang sedang melakukan penambangan dengan rencana seluas 19,196 Ha. Dampak lingkungan yang dapat terjadi seperti penurunan produktivitas tanah, pemadatan tanah, kemungkinan terjadinya erosi, gerakan tanah yang tidak stabil, terganggunya flora dan fauna, terganggunya kesehatan penduduk dan sebagainya. Untuk mengatasi berbagai macam masalah tersebut, maka perlu dilakukan suatu rencana penanggulangan dalam hal ini berupa reklamasi. Kegiatan reklamasi tersebut ditujukan guna menata dan memperbaiki kondisi daerah lahan bekas tambang menjadi lahan yang produktif. Dalam melakukan kegiatan reklamasi lahan bekas tambang dilakukan untuk mengetahui rencana teknis pada penatagunaan lahan dan revegetasi serta pemeliharaan dan perawatan tanaman. Kemudian estimasi biaya yang harus dikeluarkan oleh perusahaan. Kegiatan reklamasi dilakukan dengan kegiatan penatagunaan lahan dan revegetasi. Penatagunaan lahan dilakukan dengan penimbunan kembali lahan bekas tambang, lalu dilakukan penebaran tanah pucuk. Kegiatan revegetasi dilakukan dengan penentuan jarak tanam, pemilihan jenis tanaman, pengadaan bibit dan penanaman serta pemeliharaan dan perawatan. Luas lahan yang akan direklamasi di PT TMS sesuai dengan luas rencana penambangan yaitu 19,196 Hektar. Penatagunaan lahan dilakukan dengan menebar lapisan tanah penutup dan tanah pucuk sebagai media tumbuh tanam. Kegiatan revegetasi dilakukan dengan menentukan jenis tanaman perintis yang ditanam yaitu sengon, trembesi dan akasia. Untuk tanaman sisipan yang ditanam yaitu tanaman lokal berupa jambu mete. Tanaman cover crop yang ditanam yaitu kacang-kacangan (Mucuna Bracteata). Estimasi biaya reklamasi yang akan dikeluarkan dengan total luas area 19,196 Ha yaitu sebesar Rp. 6.909.020.471,-, yang terdiri dari biaya langsung untuk penataan lahan sebesar Rp. 5.823.036.665,- dan biaya revegetasi sebesar Rp. 226.886.651,- serta biaya tidak langsung untuk biaya perencanaan reklamasi sebesar Rp. 497.940.639,- dan biaya supervisi sebesar Rp. 354.618.870,-.

Title

Found 17 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 17 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 17 Documents
Search