Garuda - Garba Rujukan Digital

Kajian Teknis Geometri Jalan Angkut Tambang Pada Kegiatan Pengupasan Overburden PT. Bara Prima Pratama Kabupaten Indragiri Hilir Provinsi Riau Dede Yusup; Hendro Purnomo; Bayurohman Pangacella Putra
Retii 2022: Prosiding Seminar Nasional ReTII ke-17
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Bara Prima Pratama merupakan perusahaan yang bergerak dibidang pertambangan batubara yang terletak di Desa Selensen, Kecamatan Kemuning, Kabupaten Indragiri Hilir, Provinsi Riau. Kondisi geometri jalan angkut PT. Bara Prima Pratama masih memiliki beberapa bagian atau segmen jalan yang belum ideal, hal ini mempengaruhi kegiatan produksi overburden sehingga target produksi yang telah ditentukan tidak tercapai yaitu 150.000 BCM/Bulan. Tujuan dari penelitian ini adalah melakukan perbaikan geometri jalan seperti pelebaran lebar jalan angkut, menurunkan kemiringan jalan yang tidak sesuai dengan standar, pembuatan superelevasi dan cross slope untuk dapat menentukan rimpull agar mendapatkan perhitungan teoritis estimasi cycle time dan produksi alat angkut setelah dilakukannya perbaikan jalan sehingga target produksi dapat tercapai. Pada kondisi geometri jalan aktual atau sebelum perbaikan diperoleh cycle time sebesar 6,74 menit dan produktivitas alat angkut Hino 500 FM 260 sebesar 130.787,96 BCM/Bulan. Setelah dilakukan perbaikan geometri jalan, dengan menggunakan analisis rimpull dapat diestimasikan cycle time mengecil menjadi 5,68 menit dan produktivitas alat angkut Hino 500 FM 260 meningkat menjadi 155.195,58 BCM/Bulan. Sehingga produktivitas alat angkut meningkat sebesar 18,7%.

PELEPASAN ION Cu[II] DAN Mn[II} PADA AIR ASAM TAMBANG MENGGUNAKAN LEMPUNG BONTANG : Kata kunci: Lempung Bontang, air asam tambang, tembaga, mangan faisol Mukarrom; Hidayatullah Sidiq; Hendro Purnomo
Innofarm:Jurnal Inovasi Pertanian Vol. 25 No. 1 (2023): JURNAL INNOFARM : Jurnal Inovasi Petanian
Publisher : FAKULTAS PERTANIAN UNIVERSITAS SLAMET RIYADI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33061/innofarm.v25i1.8646

Clay mineral is known as a good adsorbent on metal ions. This study aimed to determine Bontang clay adsorption capacity on Cu(II) and Mn[II] heavy metal ions contained in acid mine drainage. In this study, Bontang clay was calcined at 600-700 ºC and characterized by Fourier Transform Infrared Analyzer (FTIR), X-Ray Diffraction (XRD), and Surface Area Analyzer (SAA). FTIR characterization shows the presence of active groups of silanol (Si-OH) and aluminol (Al-OH) act as heavy metal adsorbent. XRD characterization demonstrated the presence of montmorillonite, kaolinite, illite and quartz. SAA characterization revealed that after activation was greater than before activation, in amount of 34.793 m2/g for pre-activation and 49.859 m2/g for post activation. Calcination of Bontang clay improved the adsorptive capability of Cu[II] and Mn[II]. Maximum adsorption percentage of Cu[II] on raw and calcined Bontang clay were 96,53% and 94.67% at initial concentration of 10 mg/dm3 and they were 74.91% and 32.82 % for Mn[II. They decreased to 7.2% and 8.3% for raw and calcined Cu[II] and 4.3% and 6.8% for Mn[II] at initial concentration of 5,000 mg/dm3. The higher adsorption percentage is for lower concentrations for both Cu[II and Mn[II].

ESTIMASI SUMBERDAYA ANDESIT MENGGUNAKAN METODE ORDINARY KRIGING BERDASARKAN PENGUKURAN GEOLISTRIK DI PT. ZLAW GROUP BOYOLALI, JAWA TENGAH Hendro Purnomo; Rizqi Prastowo; Muhammad Hafizh Hibullah; Setyo Pambudi
Jurnal Teknologi Mineral dan Batubara Vol 19 No 1 (2023): Jurnal Teknologi Mineral dan Batubara Edisi Januari 2023
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol19.No1.2023.1336

PT. Zlaw Group Boyolali is a company of andesite mining located in Wates Hamlet, Seboto Village, Gladagsari District, Boyolali Regency, Central Java Province. The potential of andesite in the area is encouraging and the absence of supporting data about the distribution and resources of andesite brings PT. Zlaw Group Boyolali to conducting exploration. The objective of this study is to analyze the interpretation of geoelectric measurements of the dipole-dipole configuration and calculate the volume of andesite resources based on geostatistics optimization at the research location and compare the estimation results with previous studies. The research activity was carried out by measuring 2-dimensional geoelectrical resistivity using a dipole-dipole configuration of 12 passes, which covered 100% of the research area. Based on the results of geostatistics optimization, parameters obtained include: nugget 0.224053, sill 0.641390, range 67.749, major/semi-major 1.188, and major/minor 2.073. Soil volume is 1,245,750 m3 with a tonnage of 3,238,950 tons, a weathered andesite volume of 999,656 m3 with a tonnage of 2,599,106 tons, and fresh andesite volume of 1,437,925 m3 with a tonnage of 3,738,605 tons.

Desain dan Produktivitas Crushing Plant dalam Upaya Memenuhi Target Produksi Batubara Sebesar 500 Ton/Jam di PT. Dizamatra Powerindo Lahat Provinsi Sumatera Haryanto, Agus; Hendro Purnomo; Erry Sumarjono
Retii Vol 18 No 1 (2023): Prosiding Seminar Nasional ReTII ke-18 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

PT. Dizamatra Powerindo merupakan perusahaan yang bergerak di bidang penambangan batubara dengan sistem tambang terbuka. Perusahaan ini memiliki 3 (tiga) ROM yang aktif beroperasi dalam melakukan crushing batubara dan akan membangun ROM baru (ROM 4) dengan kapasitas sebesar 500 Ton/Jam. Sehingga diperlukannya desain dengan memperhatikan ketentuan-ketentuan yang menjadi standar perancangan crusher plant agar mencapai rencana produksi sebesar 500 Ton/Jam. hasil penelitian ini berdasarkan desain yang dibuat, desain crushing plant dengan target produksi 500 Ton/Jam, dapat dibuat dengan desain yang menggunakan 1 belt feeder, 3 belt conveyor, 1 vibrating screen dan 1 double roll crusher. Produktivitas rencana Crashing plant adalah, produktivitas BF01 502,608 Ton/Jam, produktivitas CP01, 510,812 Ton/jam, produktivitas RC 610,412 Ton/Jam, produktivitas CP02 518,853 Ton/Jam, dan produktivitas CP03 525,407 Ton/Jam. Dengan hasil produktivitas tersebut, secara teoritis dapat disimpulkan bahwa dengan target produksi 500 Ton/jam dapat terpenuhi.

Upaya Teknis Pencegahan Dan Penanggulangan Swabakar (Spontaneous Combustion) Pada Stocpile Di PT. Manambang Muara Enim Kecamatan Lawang Kidul, Kabupaten Muara Enim, Provinsi Sumatra Selatan Jepriansyah; Hendro Purnomo; Shilvyanora Aprilia Rande
Retii Vol 18 No 1 (2023): Prosiding Seminar Nasional ReTII ke-18 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

PT. Manambang Muara Enim merupakan suatu perusahaan yang bergerak dibidang pertambangan batubara. Penelitian dilakukan pada lokasi stockpile yang memiliki kapasitas penyimpanan sebesar 170.000 ton, dan permasalahan utama dalam penumpukan batubara pada stockpile adalah terjadinya swabakar. Tumpukan batubara di stockpile yang mengalami swabakar akan menyebabkan kerugian bagi perusahaan seperti penurunan kualitas batubara yang akan mempengaruhi permintaan pasar, terbuangnya sebagian volume batubara dan pihak perusahaan harus mengeluarkan biaya tambahan untuk penanganan batubara yang terbakar. Tujuan penelitian ini adalah untuk mengetahui penyebab terjadinya swabakar batubara pada area stockpile dan mengetahui cara pencegahan dan penanggulangan swabakar batubara di area stockpile PT.MME. Metode yang di gunakan dalam penelitian ini yaitu metode kuantitatif dengan melakukan studi litelatur guna mencari referensi yang berkaitan dengan topik penelitian, dilanjutkan dengan pengamatan lapangan guna mengetahui kondisi lapangan, kemudian pengambilan data sekunder maupun data primer selanjutnya di lakukan pengolahan data dan analisis data serta kesimpulan dan saran. Penyebab swabakar di PT MME yaitu penerapan penimbunan dan pembongkaran belum sepenuhnya melaksanakan sistem FIFO (First in first out), sehingga timbunan yang awal semakin lama ditimbun dan berpontensi menyebabkan swabakar. Oleh karena itu dilakukan penerapan sistem FIFO (First in first out) diharapkan penumpukan batubara yang terlalu lama dapat dihindari. Kemudian untuk pencegahan yang dilakukan yaitu menggunakan metode penimbunan dan pembongkaran FIFO (Fist In–Fist Out), Pemantauan temperature timbunan, Pemadatan secara berkala dan mengurangi tinggi timbunan di stockpile. Dan untuk penanganan swabakar yang diterapkan di PT.MME ini dilakukan dengan menggali batubara yang memiliki titik asap menggunakan Excavator PC200 kemudian batubara tersebut akan diambil di pindahkan ketempat lain di sekitar timbunan kemudian ditebar (spreading), atau batubara yang lama di timbun di stockpile sesegera mungkin di hauling agar penumpukan batubara tersebut tidak terlalu lama di tumpuk guna untuk menghindari swabakar. Kata Kunci: Stockpile, Swabakar, Temperature

Analisis Sistem Penyaliran Tambang Terbuka Pada Penambangan Batubara Area Blok A PT. Minemex Indonesia Site Mandiangin Kabupaten Sarolangun Provinsi Jambi Azmi Abdulah Binolombangan; Hendro Purnomo; Shilvyanora Aprilia Rande
Retii Vol 18 No 1 (2023): Prosiding Seminar Nasional ReTII ke-18 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

PT. Minemex Indonesia adalah perusahaan pertambangan batubara yang menerapkan sistem tambang terbuka. Metode tambang terbuka sangat dipengaruhi faktor cuaca terutama musim hujan. Ketika terjadi hujan dengan intensitas tinggi akan meningkatkan volume air yang terakumulasi di dasar tambang. Sistem penyaliran tambang blok A adalah mine drainage dan mine dewatering. Metode dalam upaya analisis sistem penyaliran tambang ini dengan mengolah data primer dimensi komponen penyaliran dan data sekunder data curah hujan 11 tahun terakhir memakai distribusi Gumbell dan Mononobe. Analisis data curah hujan tahun 2011-2021, diperoleh curah hujan rencana periode ulang 5 tahun sebesar 100,90 mm/hari. Intensitas curah hujan berdasarkan durasi tertinggi sebesar 22,04 mm/jam. Luas DTH berdasarkan peta situasi tambang bulan Agustus 2022 yaitu 75,9363 Ha. Debit air hujan diperoleh sebesar 14,57 m3/jam, debit air limpasan sebesar 11.088 m3/jam, dan debit air tanah sebesar 0,399 m3/jam. Pompa yang digunakan berjumlah 2 unit (Ksb 150 dan 200), debit masing-masing sebesar 400 m3/jam dan 550 m3/jam. Dimensi saluran terbuka diketahui sudah memadai, mampu menampung debit air masuk pada saluran. Volume sump kemajuan tambang Agustus 2022 sebesar 17.348,25 m3, diketahui sudah memadai. Luas total settling pond sebesar 3.138,4 m2 dan volume total 6.058,9 m3, belum cukup memadai sehingga diperlukan perbaikan dimensi. Kata kunci : Debit, Saluran, Sump, Kolam Pengendapan.

Perbandingan Alat X-Ray Dengan Olympus Element-S Untuk Menentukan Hasil Kadar Nikel Di Pt. Nikelindo Jaya Nusantara Siuna, Kabupaten Banggai, Provinsi Sulawesi Tengah Atuna, Blair; Hendro Purnomo; Ag. Isjudarto
Retii Vol 18 No 1 (2023): Prosiding Seminar Nasional ReTII ke-18 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Nikelindo Jaya Nusantara is a contractor company that carries out mining operations in the IUP area of PT. Prima Dharma Karsa, which is engaged in mining Laterite Nickel ore located in Siuna Village, Banggai Regency, Central Sulawesi Province. Nickel laterite is one of the mineral deposits resulting from the chemical weathering process of ultramafic rocks which results in residual and secondary enrichment of Ni, Fe elements. In lateritic nickel ore (ore) mining activities, changes in the elemental content of nickel ore often occur. While still in the mining front and after being transferred to the barge, it is possible that the changes in grades that occur experience quite significant differences. The purpose of this study is to determine the comparison between the two analytical tools to analyze the value of Nickel content in the Mining Front and on the Barge, then to find out how many changes in grades occur in lateritic nickel minerals from the mining front after being transferred to the Barge and find out the factors that cause changes. that rate. Grade data on nickel laterite minerals from the mining front using the Olympus tool is 2.11% and x-ray is 2.19% with a dilution of 3.79% and a difference in content of 0.08%. The Fe content from the mining front using Olympus is 31.50% and using X-Ray is 30.70% so that the dilution content is 2.54%. Furthermore, the minerals from the Barge using the Olympus tool are 1.99% and Xray are 2.04% with a dilution content of 2.51%. The Fe content from the Barge using Olympus was 26.85% and using X-Ray was 28.48% so that the dilution content was 6.07%. Changes in these levels occur due to factors due to accuracy problems in sampling, sample preparation that ignores procedures, and also human errors such as errors in sampling code, changing samples when delivered to preparation. So if you refer to these data, the tool must recalibrate even though the difference in dilution levels produced is quite low, but it is better if it is recalibrated in a shorter period of time, so that the difference in dilution levels is not too great, which causes less the accuracy of the grades displayed from the two tools even though they still meet the specifications for the grade of nickel minerals according to the company's target.

PENILAIAN DAN PREDIKSI JARINGAN SYARAF TIRUAN TERHADAP KECEPATAN PARTIKEL YANG DIINDUKSI PELEDAKAN - STUDI KASUS PENAMBANGAN BATUGAMPING Prastowo, Rizqi; Hendro Purnomo; Firhad Firmansyah; Ipmawan, Vico Luthfi
Indonesian Mining Journal Vol 27 No 1 (2024): Indonesian Mining Journal, April 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol27.No1.2024.1531

In recent decades, generation of ground vibrations results from blasting activities in mining sector has been identified as a significant cause of extensive harm to nearby structures, vegetation, and individuals. Hence, it is imperative to closely monitor and accurately forecast the uncertain levels of vibration, and implement the appropriate steps to mitigate their potentially harmful impact. The objective of this study was to establish a correlation between the peak particle velocity and the various parameters that influence it. This study employed the deployment of the artificial neural network approach to assess and forecast the uncertain ground vibrations. In this study, a multilayer perception neural network with three layers and a feed-forward back-propagation architecture was employed. The network consisted of five input parameters, namely the distance from the blast face, maximum charge per delay, spacing, burden, and depth hole. The output of interest was the peak particle velocity. The neural network was trained using the Levenberg–Marquardt algorithm, and the training dataset comprised 29 experimental records and blast event data obtained from the limestone mine in Indonesia. In order to assess the effectiveness and the precision of the artificial neural network model that was created, a total of four conventional predictor models were utilized. These models were proposed by reputable sources such as the US Bureau of Mines, Ambraseys–Hendron, Langefors–Kihlstrom, and the Bureau of Indian Standards. The results collected from the demonstrate study show that the artificial neural network model suggested in this research has the ability to provide more precise estimations of ground vibrations in comparison to existing conventional prediction models. The artificial neural network model yielded a coefficient of determination (R2) of 0.9332 and a root mean square error (RMSE) of 0.4763.

PENILAIAN DAN PREDIKSI JARINGAN SYARAF TIRUAN TERHADAP KECEPATAN PARTIKEL YANG DIINDUKSI PELEDAKAN - STUDI KASUS PENAMBANGAN BATUGAMPING Prastowo, Rizqi; Hendro Purnomo; Firhad Firmansyah; Ipmawan, Vico Luthfi
Indonesian Mining Journal Vol 27 No 1 (2024): Indonesian Mining Journal, April 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol27.No1.2024.1531

In recent decades, generation of ground vibrations results from blasting activities in mining sector has been identified as a significant cause of extensive harm to nearby structures, vegetation, and individuals. Hence, it is imperative to closely monitor and accurately forecast the uncertain levels of vibration, and implement the appropriate steps to mitigate their potentially harmful impact. The objective of this study was to establish a correlation between the peak particle velocity and the various parameters that influence it. This study employed the deployment of the artificial neural network approach to assess and forecast the uncertain ground vibrations. In this study, a multilayer perception neural network with three layers and a feed-forward back-propagation architecture was employed. The network consisted of five input parameters, namely the distance from the blast face, maximum charge per delay, spacing, burden, and depth hole. The output of interest was the peak particle velocity. The neural network was trained using the Levenberg–Marquardt algorithm, and the training dataset comprised 29 experimental records and blast event data obtained from the limestone mine in Indonesia. In order to assess the effectiveness and the precision of the artificial neural network model that was created, a total of four conventional predictor models were utilized. These models were proposed by reputable sources such as the US Bureau of Mines, Ambraseys–Hendron, Langefors–Kihlstrom, and the Bureau of Indian Standards. The results collected from the demonstrate study show that the artificial neural network model suggested in this research has the ability to provide more precise estimations of ground vibrations in comparison to existing conventional prediction models. The artificial neural network model yielded a coefficient of determination (R2) of 0.9332 and a root mean square error (RMSE) of 0.4763.

HUBUNGAN DUKUNGAN SOSIAL TERHADAP KUALITAS HIDUP PENDERITA DIABETES MELITUS PADA LANSIA DI RUMAH SEHAT BAZNAS JAKARTA TAHUN 2019 Hendro Purnomo; Ibnu Abas
Afiat Vol 6 No 02 (2020): Jurnal Afiat : Kesehatan dan Anak
Publisher : Jurnal Afiat : Kesehatan dan Anak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34005/afiat.v6i02.1335

Menurunnya derajat kesehatan dan kemampuan fisik akan mengakibatkan lansia secara perlahan menarik diri dari hubungan dengan masyarakat sekitar, sehingga interaksi sosial menjadi menurun, dan dengan menurunnya interaksi sosial lansia, tentunya kualitas hidup yang dialami lansia juga mengalami penurunan. Tujuan penelitian ini untuk melihat hubungan dukungan sosial terhadap kualitas hidup penderita diabetes melitus pada lansia di rumah sehat baznas Jakarta. Metode Penelitian ini menggunakan deskriptif korelasi. Jumlah sampel adalah sebanyak 61 lansia penderita DM tipe 2 yang diambil dengan teknik simple random sampling. Analisis yang digunakan univariat dan bivariat melalui statistik uji chi – square dengan = 5%. Hasil Penelitian menunjukan adanya hubungan dukungan sosial terhadap kualitas hidup penderita diabetes melitus pada lansia di rumah sehat baznas jakarta tahun 2019 dengan nilai = 0,003. Simpulan terdapat hubungan dukungan sosial terhadap kualitas hidup penderita diabetes melitus pada lansia. Saran diharapkan dapat menjadi referensi untuk memberikan masukan dalam upaya untuk dapat lebih mengkoordinir dalam meningkatkan kegiatan-kegiatan sosialisasi kesehatan maupun kegiatan-kegiatan kemasyarakatan lainnya The decline in the degree of health and physical abilities will cause the elderly to slowly withdraw from relationships with the surrounding community, so that social interaction decreases, and with decreasing social interaction of the elderly, of course the quality of life experienced by the elderly also decreases. The purpose of this study was to look at the relationship of social support to the quality of life of people with diabetes mellitus in the elderly in Rumah Sehat Baznas Jakarta. The research method uses descriptive correlation. The sample was 61 elderly with DM type 2 who were taken by simple random sampling technique. The analysis used univariate and bivariate through chi-square test statistics with = 5%. The results showed a relationship of social support for the quality of life of people with diabetes mellitus in the elderly in the healthy home of the Jakarta baznas in 2019 with a value = 0.003. Conclusion there is a relationship of social support to the quality of life of people with diabetes mellitus in the elderly. Suggestions are expected to be a reference to provide input in an effort to be more coordinated in improving health socialization activities and other social activities.

Title

Found 20 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 20 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 20 Documents
Search