scholarly journals Penanganan Kolam Sedimentasi Hasil Pencucian Bauksit Di PT. ANTAM Tbk. Tayan

2019 ◽  
Vol 2 (2) ◽  
pp. 87
Author(s):  
Muhammad Ridho ◽  
Peter Eka Rosadi
Keyword(s):  
Open Channel ◽  
Open Pit ◽  
West Kalimantan ◽  
Washing Process ◽  
Bauxite Ore ◽  
Factor Data ◽  
Production Target ◽  
Total Discharge

Bauxite ore mining PT.Antam Tbk. located in Tayan Hilir Subdistrict, Sanggau Regency, West Kalimantan Province is an open pit backfilling system. Besides the bauxite ore extraction, the washing process resulted slurry which is entering the open channel towards the sedimentation pond. This study aims to determine the total discharge of slurry that will enter the sedimentation pond and assess the capacity of existing sedimentation ponds. The results showed that based on the production target of 700,000 tons of Bauxite Washed/year with 60% concretion factor data, the total discharge of water entering the sedimentation pond was 3.54 m3/sec. The slurry from the open channel will go into the sedimentation pond so that the deposition found in Segment I, IV, V, and VI was 409.06 m3/day, 254.59 m3/day, 561.35 m3/day, and 273.90 m3/day respectivelly. Intensive dredging material will be carried out using two Hitachi Zaxis 210 LC Long-Arm Excavator units. The cleaning time needed by Segment I, IV, V, and VI are 10 days, 6 days,  9 days and 5 days, so that the dredging time of Segment I, IV, V, and VI are 82 days, 65 days, 53 days and 62 days respectivelly

scholarly journals Slope ranking and geohazards correlation analysis for combined open-underground mining area

2018 ◽  
Author(s):  
Zhang Jin
Keyword(s):  
Correlation Analysis ◽  
Water Conservation ◽  
Laser Scanning ◽  
Underground Mining ◽  
Mining Area ◽  
Open Pit ◽  
Ground Subsidence ◽  
Data Sets ◽  
Mining Areas ◽  
Factor Data

Geohazards in mining areas are mainly ground subsidence, slope landslides and ground cracks, surface cover degradation and environmental ecological pattern destruction. The classification and rank of terrain slope and the feature area extraction of the slope are the important content for the correlation analysis with the geohazards. The slope classification and rank index system for soil and water conservation, land use and man-made ground disasters was analyzed. According to the characteristics of open pit and underground associated mining area, we comprehensively analyzed the spatial correlation between different ground disaster and terrain features and landform types, and propose a new slope ranking index, dividing slope zones and forming slope classification map. Especially slope area of 35-45 degrees and more than 45 degrees was extracted, and the relationship between regional geohazards and slope zone was analyzed. The application of terrestrial laser scanning technology to establish open-pit high precision digital elevation model, extraction of slope, slope type, gully density characteristic factor, topography factor data sets are established, and correlation analysis, to enhance disaster information content.

scholarly journals Designing Open Channel Dimension for Imkasu Area West Papua

2021 ◽  
Vol 2117 (1) ◽  
pp. 012039
Author(s):  
A S Sari ◽  
Y D G Cahyono ◽  
N N A Johnson ◽  
D Simorangkir ◽  
F A Redanto ◽  
...  
Keyword(s):  
Open Channel ◽  
Channel Length ◽  
Open Pit ◽  
Open Pit Mining ◽  
Mining System ◽  
Run Off ◽  
West Papua ◽  
Presidential Decree ◽  
Technical Study ◽  
Natural Channel

Abstract Gag Nikel Ltd belongs to a Contract of Work located in Gag Island, West Waigeo Islands District, Raja Ampat Regency, West Papua Province. The open pit mining system employed at this company will enter the mining location and therefore, requires a design of open channel for diversing water coming from rainfall, run off, and ground. The rainfall intensity calculated by Mononobe formula obtained 5,994 mm / hour, whereas the catchment area got 0.59 km 2. The total discharge of run off calculated by Rational Formula gained 1867,956 m 3 / hour. Meanwhile, the design of open channel calculated by Manning Formula yielded wet section (A) = 0.668 m 2, base width (b) = 0.714 m, and depth (h) = 0.714 m, surface width (B) = 1.542 m. Box control having the volume 1 m3, length = 1 m, width = 1 m, and height 1 m must be made every 1 kilometer of open channel length. Around the area of open channel, the used tire must be given to reduce the erosion rate flowing into settling pond. All of these are necessary because the open channel is located near the natural channel and we must also consider several regulations such as Presidential Decree and IPPKH adjusted to the technical study that has been designed.

scholarly journals Delay effect of mud loading to the open pit design in terms of meeting 2018 – A coal production target case study of pit XYZ at South Kalimantan

2020 ◽  
Vol 23 (2) ◽  
pp. 67-82
Author(s):  
Karel Warda ◽  
◽  
Bagus Wiyono ◽  
Tedy Cahyadi ◽  
Sigit Prabowo ◽  
...  
Keyword(s):  
Open Pit ◽  
Coal Production ◽  
Internal Factors ◽  
Sequence Pattern ◽  
Loading Process ◽  
Direct Observations ◽  
Mining Sequence ◽  
Pit Design ◽  
Production Target

Based on the 2018, there a mining plan, two temporary sumps, namely the ABC and BCD sumps. They located in a mining sequence pattern. These sumps required a mud loading process prior to mining the coal below the sequence. The mud loading process is loaded sequentialy. However, the problem occurs when the mud loading process in the ABC sump is delayed, and resulted only 42% of mud production. Such the delay resulted in hindering the mining sequence pattern which forced changes in plans, designs, and decrease of coal production. These condition led to study the cause, impact, and alternative solution of the delay during mud loading process. The method used in this study includes direct observations and data collection of working conditions, equipment capabilities, material properties, and operation timeline. In this study, the statistical analysis is used to determine the cause and effect of delayed mud loading process. A Minex Software is then used to simulate the alternative of redesign the mining sequence pattern. The study found that the delay in mud loading process is due to the external and internal factors, that result in underproduction of coal only 505,833 tons, and delayed of coal production around 64 days. An alternative that can be conducted is to change the direction progress to the area that has low stripping ratio. Factors that can hinder the progress are need to be considered for anticipating the plan distraction at mid-term-plan.

scholarly journals Implementation of reverse flotation method to reduce reactive and non-reactive silica in bauxite ore from West Kalimantan

2017 ◽  
Author(s):  
Winny Wulandari ◽  
Mubiar Purwasasmita ◽  
Edy Sanwani ◽  
Adinda Asri Pixelina ◽  
Agus Maulidan
Keyword(s):  
Reverse Flotation ◽  
West Kalimantan ◽  
Bauxite Ore ◽  
Flotation Method ◽  
Reactive Silica

scholarly journals PERANAN BAHAN/SISA ORGANIK LAIN SEBAGAI PENGGANTI TOP SOIL TEHADAP KEBERHASILAN REKLAMASI/REVEGETASI DI WILAYAH BEKAS TAMBANG BAUKSIT PT ANTAM Tbk UBP BAUKSIT KALIMANTAN BARAT1

2020 ◽  
Vol 1 (1) ◽  
pp. 651-662
Author(s):  
Umar Bahidin
Keyword(s):  
Cover Crop ◽  
Organic Materials ◽  
Open Pit ◽  
Positive Contribution ◽  
West Kalimantan ◽  
Land Mine ◽  
Top Soil ◽  
Reclamation Area ◽  
Legume Cover Crop

ABSTRAK Top Soil masih memegang peranan penting untuk menunjang keberhasilan kegiatan reklamasi/revegetasi pada areal bekas tambang, khususnya pertambangan terbuka (open pit/cast). Lapisan/layer top soil yang relatif tipis/sedikit membuat kegiatan reklamasi/revegetasi menjadi tidak maksimal. Diperlukan bahan/sisa organik lain sebagai alternatif untuk menggantikan fungsi/peran top soil untuk memperbesar persentasi keberhasilan kegiatan reklamasi/revegetasi. Penelitian ini bertujuan untuk mengetahui sejauh mana peran dari bahan/sisa organik lain untuk membantu memperbaiki kualitas lahan di areal bekas tambang bauksit. Penelitian dilakukan dari mulai dari tahun 2017 sampai dengan tahun 2019, di areal reklamasi PT ANTAM Tbk UBP Bauksit, Kecamatan Tayan Hilir, Kabupaten Sanggau, Provinsi Kalimantan Barat. Metode yang digunakan adalah pembuatan dem plot ukuran 20m x 6m dengan  kolom 1 (satu) sebagai kontrol (areal tanah asli/bekas tambang),  kolom 2 (dua) untuk TKKS, Kolom 3(tiga) dengan Serasah, serta Kolom 4 (empat) dengan top soil. Keempat kolom tersebut untuk melihat sejauhmana tingkat pertumbuhan tanaman pokok (jambu hutan dan Jambu mete) dan Legume Cover Crop (LCC) dengan menggunakan perlakuan tersebut. Analisa sifat fisik kimia tanah juga dilakukan untuk mengetahui kandungan dari tiap-tiap bahan/sisa organik lain yang kemudian dibandingkan dengan top soil. Hasil penelitian menunjukkan bahwa bahan/sisa organik lain dapat memberikan konstribusi positif pada areal reklamasi/revegetasi, dengan meningkatkan percepatan pertumbuhan cover crop dan tanaman pokok. Hasil penelitian juga saat ini sudah diaplikasikan untuk kegiatan reklamasi/revegetasi PT ANTAM Tbk UBP Bauksit mulai dari tahun 2018 sampai dengan saat ini. Kata kunci : Top Soil, bahan/sisa organik lain, bekas tambang bauksit, open pit/cast, reklamasi, revegetasi, Jambu Hutan, Jambu Mete, LCC.   ABSTRACT Top Soil still plays an important role to support the success of reclamation/revegetation activities in mine out areas, especially open pitcast mining. Top soil layers that are relatively thins/lightly make reclamation/revegetation activities not optimal. Other organic materials/waste is needed as an alternative to replace the function/role of top soil to increase the percentage of successful reclamation/revegetation activities. This study aims to determine the extent of the role of other organic materialswaste to help improve the quality of land mine out areas. The study was conducted from 2017 to 2019, in the reclamation area of PT ANTAM Tbk UBP Bauksit, Tayan Hilir District, Sanggau Regency, West Kalimantan Province. The method used is making a demonstration plot of 20m x 6m size with column 1 (one) as a control (original / mine out area), column 2 (two) for TKKS Treatment, Column 3 (three) for Serasah Treatment, and Column 4 (four) with top soil. The four columns are to see the extent of growth of staple plants (local guava and Cashew) and Legume Cover Crop (LCC) using these treatments. Analysis of soil chemical physical properties was also carried out to determine the content of each other organic material /waste which was then compared with top soil. The results showed that other organic materials/waste can make a positive contribution to the reclamation / revegetation area, by increasing the acceleration of cover crop growth and staple crops. The results of the study have also been applied for the reclamation/revegetation activities of PT ANTAM Tbk UBP Bauxite starting from 2018 until now. Keywords: Top Soil, other organic materials /waste, bauxite mining, mine out,  open pit/cast, reclamation, revegetation, Local Guava, Guava, LCC, Cashew

scholarly journals Rencana Produksi Pengangkutan Overburden Berdasarkan Pola Hujan di PT X Site Asam-Asam, Desa Riam Andungan, Kecamatan Kintap, Kabupaten Tanah Laut, Provinsi Kalimantan Selatan

2021 ◽  
Vol 1 (1) ◽  
pp. 8-21
Author(s):  
Abdulah ◽  
Yunus Ashari ◽  
Maryanto
Keyword(s):  
Correlation Analysis ◽  
Rainfall Intensity ◽  
Surface Mining ◽  
Open Pit ◽  
Traffic Classification ◽  
Mining Activities ◽  
Output Data ◽  
Production Output ◽  
The Relationship ◽  
Production Target

Abstract. PT X is a subsidiary of PT Pama Persada which is engaged in coal mining by using an open pit system, so that its mining activities are very much needed in the weather. Based on production output data, monthly production targets are not achieved, displayed in 2018 and 4 months of which production targets are not achieved in May, August, September, and December. This causes erratic rain that can be canceled due to mining activities. That way it needs to be reviewed in determining production targets based on rain predictions. In this research an analysis is performed first, then data processing is performed using rain classification, traffic classification, and productivity calculation. The results of this study on the correlation analysis of the relationship between rain hours to rainfall, slippery, and rainfall intensity are all three influential, it's just that the effect is very strong based on the correlation test that is the rainfall intensity with a significant value <0.05 and the correlation value 0.704 is at intervals 0.61 - 0.80, including the strong correlation category. Then the results of rain hour forecasting in January 2019 are 71.25 hours, February 2019 is 53.92 hours, and in March 42.06 hours. For forecasting slippery time in January 2019 is 23.97, in February 2019 that is 18.18, and in March 2019 14.30 hours. Calculation of monthly production targets is based on forecasting rain hours, the results of forecasting production targets for 2019 in January are 1,205,331.64 BCM, February 1,106,561.46 BCM, in March 1,406,595.41 BCM. Keywords: Rain, Slippery, Rain Prediction, Productivity, Production Target. Abstrak. PT X merupakan anak perusahaan dari PT Pama Persada yang bergerak di bidang penambangan batubara dengan menerapkan sistem tambang terbuka (Surface Mining), sehingga dalam kegiatan penambangannya sangat bergantung pada keadaan cuaca. Berdasarkan data hasil produksi, tidak tercapainya target produksi perbulan, tercatat pada tahun 2018 terdapat 4 bulan yg tidak tercapainya target produksi yaitu pada bulan Mei, Agustus, September, dan Desember. Hal tersebut disebabkan keadaan hujan yang tidak menentu yang dapat menghentikan aktivitas kegiatan tambang. Dengan begitu perlu dilakukan pengkajian ulang dalam menentukan target produksi berdasarkan prediksi hujan. Dalam penelitian ini dilakukan analisis korelasi terlebih dahulu, keudian dilakukan pengolahan data dengan menggunakan klasifikasi intensitas hujan, tahap peramalan, dan perhitungan produktivitas. Hasil dari penelitian ini pada analisis korelasi hubungan antara jam hujan terhadap curah hujan, slippery, dan intensitas hujan ketiganya berpengaruh, hanya saja nilai yang pengaruhnya sangat kuat berdasarkan uji korelasi yaitu intensitas hujan dengan nilai signifikan < 0,05 dan nilai korelasi 0,704 berada pada interval 0,61 − 0,80 termasuk kategori korelasi kuat. Kemudian hasil dari peramalan jam hujan pada bulan januari 2019 yaitu 71,25 jam, bulan februari 2019 yaitu 53,92 jam, dan pada bulan maret 42,06 jam. Untuk peramalan waktu slippery pada bulan januari 2019 yaitu 23,97, pada bulan februari 2019 yaitu 18,18, dan pada bulan maret 2019 14,30 jam. Perhitungan target produksi bulanan berdasarkan peramalan jam hujan, hasil peramalan target produksi tahun 2019 pada bulan Januari yaitu 1.205.331,64 BCM, bulan Februari 1.106.561,46 BCM, pada bulan Maret 1.406.595,41 BCM.

scholarly journals Slope ranking and geohazards correlation analysis for combined open-underground mining area

2018 ◽  
Author(s):  
Zhang Jin
Keyword(s):  
Correlation Analysis ◽  
Water Conservation ◽  
Laser Scanning ◽  
Underground Mining ◽  
Mining Area ◽  
Open Pit ◽  
Ground Subsidence ◽  
Data Sets ◽  
Mining Areas ◽  
Factor Data

Geohazards in mining areas are mainly ground subsidence, slope landslides and ground cracks, surface cover degradation and environmental ecological pattern destruction. The classification and rank of terrain slope and the feature area extraction of the slope are the important content for the correlation analysis with the geohazards. The slope classification and rank index system for soil and water conservation, land use and man-made ground disasters was analyzed. According to the characteristics of open pit and underground associated mining area, we comprehensively analyzed the spatial correlation between different ground disaster and terrain features and landform types, and propose a new slope ranking index, dividing slope zones and forming slope classification map. Especially slope area of 35-45 degrees and more than 45 degrees was extracted, and the relationship between regional geohazards and slope zone was analyzed. The application of terrestrial laser scanning technology to establish open-pit high precision digital elevation model, extraction of slope, slope type, gully density characteristic factor, topography factor data sets are established, and correlation analysis, to enhance disaster information content.

scholarly journals ANALISIS METODE PENGGALIAN PADA MATERIAL LUNAK DENGAN MENGGUNAKAN PC 2000 HINGGA PC 4000 DI TAMBANG LATI, PT BERAU COAL

2020 ◽  
Vol 1 (1) ◽  
pp. 103-112
Author(s):  
Welly Turupadang ◽  
Ichsan Sebastian ◽  
Nur Alim K ◽  
Bagus Rachmad ◽  
Komang Yogatama
Keyword(s):  
Soft Materials ◽  
Standard Penetration Test ◽  
Soft Material ◽  
Open Pit ◽  
Open Pit Mining ◽  
Penetration Test ◽  
Mining Operations ◽  
Cross Sectional ◽  
Production Target ◽  
Operational Aspects

ABSTRAK  Tambang Lati merupakan bukaan pit terbesar yang dioperasikan oleh PT Berau Coal (PT BC) dengan target produksi batubara pada tahun 2019 sebesar 14,2 juta Metrik Ton (M/T) dan Stripping Ratio (SR) 12,5. Untuk memenuhi target produksi tersebut, maka diperlukan pengembangan lokasi baru dengan total luas bukaan sekitar 187 ha. Distribusi luasan tersebut meliputi 61% atau sekitar 114 ha merupakan area pengembangan pit berupa material  lunak / rawa dengan estimasi volume yang harus dipindahkan sekitar 14 juta Bank Cubic Meter (BCM), sedangkan sisanya merupakan morfologi area perbukitan gelombang rendah – sedang, hal ini dicirikan adanya dataran luas dengan perbukitan di sekitarnya. Ketersediaan alat gali dan muat yang besar (PC 2000 – PC 4000) di Lati mengakibatkan jumlah material untuk kebutuhan timbunan perlapisan jalan maupun front loading di area rawa (layering) yang digunakan menjadi lebih besar dari perencanaan awal. Hal ini mempengaruhi Stripping Ratio  (SR) yang sangat signifikan dan tingkat keekonomisan Tambang Lati PT Berau Coal. Evaluasi dilakukan dengan menggunakan data material insitu (tanah lunak / rawa) yang diperoleh dari hasil pemboran Standard Penetration Test (SPT). Penampang atau profil material lunak/ rawa dapat dikelompokkan berdasarkan data hasil pemboran ini, sehingga diperoleh distribusi penyebarannya dan dapat ditentukan secara vertikal maupun horizontal. Distribusi data penampang atau profil material lunak/rawa digunakan pada analisis geoteknik yang dikombinasikan terhadap aspek keselamatan dan operasional dari unit yang digunakan serta dilakukan percobaan langsung di lapangan selama 2 bulan pada lokasi yang acak. Penelitian ini mengevaluasi tingkat kestabilan lereng material lunak/endapan rawa, optimalisasi metode penggalian serta  layering  sehingga dapat mengakomodasi berbagai kepentingan, khususnya aspek keselamatan dan keekonomisan tambang. Hasil penelitian menunjukkan bahwa loading material lunak / rawa yang mengkombinasikan hasil kajian geoteknik dan aspek operasional dapat bersinergi sehingga operasional penambangan dapat dilakukan secara aman, efisien dan ekonomis dengan menggunakan alat besar (PC2000 – PC4000) yang tersedia di Lati Mine Operation. Kata kunci : Tambang Lati, Tanah Lunak, Rawa, PT Berau Coal, Stripping Ratio, Standard Penetration Test, Loading rawa, PC 2000, PC 2500, PC 3600 dan PC 4000.  ABSTRACT Lati Mine Operation is the largest open-pit mining operated by PT Berau Coal (PT BC) with a coal production target in 2019 of 14.2 million Metric Tons (M / T) and Stripping Ratio (SR) 12.5. To meet the production target, it is necessary to develop a new location with a total open-pit area of around 187 ha. 61% or around 114 ha of the area are development zones consisting of 14 million Bank Cubic Meters (BCM) of soft materials, while the rest is the morphology of low-moderate hills, this is characterized by a vast plain surrounded by hills. The availability of large excavator and hauler equipment (PC 2000 - PC 4000) to move the overburden materials causes the amount of material for layering needs exceeds the initial plan. This condition will affect Stripping Ratio (SR), which has a significant effect on the economic level of Lati Mine. An evaluation is carried out using insitu data (soft materials) obtained from the results of the Standard Penetration Test (SPT) drilling. Cross section of the soft materials can be grouped by drilling data, so that distribution is obtained and can be vertically or horizontally determined at the Lati mine site. Cross-sectional or soft materials profiles data distribution are then used in the geotechnical analysis combined with the safety and operational aspects of the used-units which had field trial for 1 month at many random locations. This study evaluated the stability of soft materials and the optimization of digging and layering methods so that it can accommodate various interests, especially the mining safety and economic aspects. The results show that soft materials loading which combines the results of geotechnical studies and operational aspects can synergize so that mining operations can be carried out safely, efficiently and economically by large equipment available in Lati Mine Operation. Keywords : Lati Mine Operation, Soft Material, PT Berau Coal, Stripping Ratio, Standard Penetration Test, Soft Material Loading, PC 2000, PC 2500, PC 3600 and PC 4000.

scholarly journals ANALISIS MUTU AIR AKIBAT AKTIVITAS PENAMBANG PASIR DENGAN METODE STORET DI SUNGAI SP PADANG OKI

2021 ◽  
Vol 9 (1) ◽  
pp. 22-29
Author(s):  
Yosieguspa Yosieguspa ◽  
Ria Fahleny ◽  
Yuliani Yuliani
Keyword(s):  
Water Quality ◽  
River Water ◽  
Water Discharge ◽  
Open Pit ◽  
Quality Data ◽  
Open Pit Mining ◽  
Sand Mining ◽  
Water Quality Data ◽  
Washing Process

Sand mining in the village of Sp Padang is carried out in an open pit mining model through several processes, for example the washing process which is carried out to separate sand from other components.When the sludge in the form of mud and fine sand enters the river, this part causes the quality of river water around the sand mining location to decline. The purpose of this research was to determine the condition of water quality due to sand mining in the river Sp.Padang.The type of data collected is primary data. The research was conducted at 3 stations on the river Sp.Padang.The physico-chemical parameters of river water are used, namely: turbidity, temperature, pH, TSS, DO, BOD, COD, water discharge and current velocity. The data obtained from the laboratory were then analyzed, then comparisons were made with the Storet method.Sampling for water quality replaces the surrounding area with direct measurements and measurements made in the laboratory.The use of the Storet method refers to PP No. 82 of 2001. The principle of Storet is to integrate river water quality data with river water standards and then adjust it according to its use, by classifying water quality into four classes. The results of the data analysis of the quality of river water in Sp.Padang as a result of the sand mining activities are categorized as good class B (lightly polluted) with a score of -6. Sand mining activity affects the water quality of the Sirah River in Padang Island, OKI Regency.Key words : OKI, sand miners, storet method, water quality

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