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Karakteristik Material Jalan Angkut Tambang Berdasarkan Uji Atterberg dan California Bearing Ratio Megasukma, Yosa; Zahar, Wahyudi; Wiratama, Jarot; Prabawa, Aditya Denny; Lagowa, M. Ikrar
Geosapta Vol 9, No 1 (2023): JANUARI 2023
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jg.v9i1.13509

Jalan angkut tambang merupakan sarana pentin untuk pengangkutan material. Di PT. Inti Bara Nusalima kegiatan pengangkutan batubara dihentikan saat hujan, karena jalan tidak bisa dilalui alat angkut sehingga perlu perbaikan agar kegiatan pengangkutan dapat berjalan lancar. Perusahaan belum melakukan kajian tentang material jalan dan daya dukung material yang digunakan sebagai jalan angkut. Penelitian ini bertujuan untuk mengetahui klasifikasi material dilakukan dengan Uji Atterberg dengan standar AASHTO dan daya dukung material dengan Uji Dynamic Cone Penetrometer (DCP) untuk mendapatkan nilai California Bearing Ratio (CBR). Berdasarkan hasil analisis ukuran butir material dan uji batas cair dan batas plastis Atterberg, didapatkan bahwa material pada titik 1,2,5,8,9 dan 10 adalah material dengan plastisitas tinggi. Semakin tinggi indeks plastisitas suatu material, maka semakin tinggi potensial pengembangan dari material tersebut. Berdasarkan hasil Uji DCP diperoleh nilai CBR yang beragam dengan nilai CBR tertiggi sebesar 13% pada titik 6 dan nilai CBR teredah sebesar 6% pada titik 7. Berdarsarkan pada pengujian tersebut menyatakan bahwa material yang digunakan pada jalan angkut dikategorikan sebagai tanah dasar sedang sampai buruk, maka diperlukan perawatan jalan yang baik agar material ini dapat bertahan lama sebagai jalan angkut.

PERENCANAAN TEKNIS PENANGANAN LUMPUR DARI SUMP PIT SELATAN MENUJU DISPOSAL DI PT CARITAS ENERGI INDONESIA SITE PT BJL Putra, Tommi Mandala; Yulanda, Yudi Arista; Lagowa, Muhammad Ikrar
Jurnal Inovasi Pertambangan dan Lingkungan Vol 4, No 2 (2024): Jurnal Inovasi Pertambangan dan Lingkungan
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jipl.v4i2.42559

Lumpur yang terbentuk di area sump pit tambang terbuka menimbulkan risiko ketidakstabilan operasional dan membutuhkan solusi pengelolaan yang efisien. Penelitian ini dilakukan untuk merencanakan pemindahan lumpur dari sump pit selatan menuju disposal di PT Caritas Energi Indonesia site PT Batubara Jambi Lestari. Dengan menggunakan metode Universal Soil Loss Equation (USLE), volume lumpur yang terbentuk diperkirakan mencapai 1789 meter kubik per bulan. Selain itu, dilakukan perancangan teknis sliding pad, tanggul kolam, dan kolam penampungan lumpur (mud cell) untuk meminimalkan risiko dan meningkatkan efisiensi penanganan lumpur. Desain sliding pad dibuat dengan dimensi yang sesuai untuk mengalirkan lumpur secara gravitasi sehingga aman untuk alat yang bekerja, sedangkan kolam penampungan lumpur (mud cell) memiliki kapasitas 5500 meter kubik. Untuk pemindahan lumpur, kombinasi dua unit excavator Komatsu PC300 dan tujuh unit dump truck Scania 380P sebagai alat hauler, waktu yang dibutuhkan pada kegiatan pemindahan lumpur dari sump ke disposal, disesuaikan dengan alat mekanis yang ada yaitu selama 12,9 jam.

Pembekalan Materi Pembelajaran Pemberaian Batuan (Rock Excavation) Di Smk Muhammadiyah Jurusan Geologi Pertambangan Kota Jambi Farid, Faizar; Prabawa, Aditya Denny; Lagowa, M. Ikrar; Wiratama, Jarot; Megakusuma, Yosha; Wahyudi, Lutfi; Zahar, Wahyudi
Jurnal Karya Abdi Masyarakat Vol. 4 No. 2 (2020): Jurnal Karya Abdi Masyarakat
Publisher : LPPM Universitas Jambi

SMK Muhammadiyah Kota Jambi adalah sebuah sekolah menengah kejuruan swasta yang berdiri pada tanggal 27 Maret 2014. SMK ini berlokasi di Jl, Guntur No.2 Rt.8, Kelurahan Kasang, Kec. Jambi Timur, Kota Jambi. Status SMK Muhammadiyah Kota Jambi saat ini belum terakreditasi dan sedang dalam tahap pengajuan. Sedangkan kurikulum pembelajaran yang dipakai yaitu KTSP (Kurikulum Tingkat Satuan Pendidikan). SMK memiliki dua jurusan utama yakni perbankan syariah dan geologi pertambangan.Permasalahan yang di hadapi SMK Muhammadiyah yakni belum terakreditasinya sekolah, Sarana dan prasarana yang belum memadai, terutama yang berkaitan langsung dengan proses belajar mengajar, diantaranya: laboratorium, sampel batuan dan mineral, alat ukur dan gps, dll, Kurangnya jumlah guru yang memiliki kompetensi di bidang pertambangan . Belum adanya kerjasama dengan stakeholder terkait, misalnya SMK Geologi/ Pertambangan lain, universitas, maupun instansi dan perusahaan yang berkaitan dengan Pertambangan, Kurangnya kegiatan kunjungan lapangan. Program Studi Teknik Pertambangan Universitas Jambi dalam kapasitasnya sebagai institusi pendidikan tinggi yang rgerak di bidang pertambangan berniat untuk berkontribusi dan bekerjasama dengan pihak SMK Muhammadiyah Jambi untuk menjawab permasalahan rendahnya kualitas proses belajar mengajar, khususnya pada jurusan Geologi Pertambangan, dengan program pengabdian kepada masyarakat yang berjudul â€œPembekalan Materi Pembelajaran Pemberaian Batuan (Rock Excavation) di SMK Muhammadiyah Jurusan Geologi Pertambanganâ€. dengan hasil akhir kegiatan pengabdian yakni buku ajar dan jurnal ilmiah.

THE EFFECT OF MILLING ON PARTICLE SIZE AND CRYSTAL STRUCTURE IN MECHANOCHEMICAL PROCESSING OF LEAD-CONTAMINATED SYNTHETIC SOIL Lagowa, Muhammad Ikrar; Maulana, Lucky Zaehir
JOURNAL ONLINE OF PHYSICS Vol. 10 No. 2 (2025): JOP (Journal Online of Physics) Vol 10 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v10i2.43457

crystal structure, which can immobilize lead and mitigate environmental contamination. Milling as a mechanical treatment plays a critical role in determining the final properties of the processed material. This study investigates the role of particle size and crystal structure in the mechanochemical treatment of lead-contaminated synthetic soil. Two synthetic soil samples were prepared in the laboratory, including lead contamination. Milling of the contaminated soils was carried out in a planetary ball mill. The samples were analysed using a lasersizer and X-Ray Diffraction (XRD) to investigate the change in particle size and identify the crystalline phase after milling. The results showed that milling initially reduced particle size, but further milling resulted in particle agglomeration, which was reflected by partial amorphization in soil samples after milling. Other than the partial amorphization, no phase change was detected in the crystal structure. In conclusion, milling resulted in the change of particle size but did not affect the crystalline phase of the milled sample, despite of partial amorphization.

EVALUASI KINERJA JIG TIPE PAN AMERICAN TERHADAP RECOVERY TIMAH HASIL PENCUCIAN BIJIH TIMAH PADA KAPAL ISAP PRODUKSI (KIP) TIMAH 17 DI LAUT TEMPILANG KABUPATEN BANGKA BARAT, PROVINSI BANGKA BELITUNG Abror, Muhammad; Lagowa, Muhammad Ikrar; Hakim, Muhammad El
Jurnal Teknologi Mineral dan Batubara Vol 20 No 3 (2024): Jurnal Teknologi Mineral dan Batubara Edisi September 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol20.No3.2024.1589

The early stage of mineral processing usually focuses mainly on recovery, not the grade of the concentrate. Tin dressing in Production Section Vessel on January 2023 did not meet target recovery of 96%. This study aimed to evaluate and optimize jig performance to achieve the desired target. The study focused on evaluating the configuration of variables such as feed velocity, bed thickness, as well as number and length of strokes. Measurement data of jig performance variables and tailings and concentrate samples were used as comparative data to the SOP. The calculation of the sample content was carried out through the grain counting analysis (GCA) method, which calculated the amount of concentrate and losses in each jig. The final results of washing recovery prior to washing evaluation were 92.70% Sn in observation I and 88.68% Sn in observation II, respectively. The washing process in observation I and II conditions were not considered optimal because the recovery had not reached the target. This is caused by variables that are not under the provisions To optimize the performance of the jig was the installation a comb in the flow section of the jig to standardize the flow that was too fast, remeasurement after the addition of the hematite stone, repairing pillow blocks and eccentric coupling bolts on the stroke length setting and resetting the variables in the jig performance following existing SOPs. After the evaluation and readjustment of the jig variables, the recovery was increased to 97.53% Sn. From this study it can be concluded that the failure to achieve the targeted recovery was caused by operational variables that did not meet the SOP including the length and number of strokes, bed thickness, and water flow rate due to technical constraints. After being repaired, the dressing recovery could meet or even exceed the recovery target.

EVALUASI KINERJA JIG TIPE PAN AMERICAN TERHADAP RECOVERY TIMAH HASIL PENCUCIAN BIJIH TIMAH PADA KAPAL ISAP PRODUKSI (KIP) TIMAH 17 DI LAUT TEMPILANG KABUPATEN BANGKA BARAT, PROVINSI BANGKA BELITUNG Abror, Muhammad; Lagowa, Muhammad Ikrar; Hakim, Muhammad El
Jurnal Teknologi Mineral dan Batubara Vol 20 No 3 (2024): Jurnal Teknologi Mineral dan Batubara Edisi September 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol20.No3.2024.1589

The early stage of mineral processing usually focuses mainly on recovery, not the grade of the concentrate. Tin dressing in Production Section Vessel on January 2023 did not meet target recovery of 96%. This study aimed to evaluate and optimize jig performance to achieve the desired target. The study focused on evaluating the configuration of variables such as feed velocity, bed thickness, as well as number and length of strokes. Measurement data of jig performance variables and tailings and concentrate samples were used as comparative data to the SOP. The calculation of the sample content was carried out through the grain counting analysis (GCA) method, which calculated the amount of concentrate and losses in each jig. The final results of washing recovery prior to washing evaluation were 92.70% Sn in observation I and 88.68% Sn in observation II, respectively. The washing process in observation I and II conditions were not considered optimal because the recovery had not reached the target. This is caused by variables that are not under the provisions To optimize the performance of the jig was the installation a comb in the flow section of the jig to standardize the flow that was too fast, remeasurement after the addition of the hematite stone, repairing pillow blocks and eccentric coupling bolts on the stroke length setting and resetting the variables in the jig performance following existing SOPs. After the evaluation and readjustment of the jig variables, the recovery was increased to 97.53% Sn. From this study it can be concluded that the failure to achieve the targeted recovery was caused by operational variables that did not meet the SOP including the length and number of strokes, bed thickness, and water flow rate due to technical constraints. After being repaired, the dressing recovery could meet or even exceed the recovery target.

OPTIMASI DOSIS PUPUK NPK DAN ASAM HUMAT DALAM MEMPERBAIKI KUALITAS TANAH BEKAS TAMBANG BATUBARA DAN PERTUMBUHAN SENGON SOLOMON Tampubolon, Gindo; Lagowa, Muhammad Ikrar; Simarmata, Jhoy Michael; Sitanggang, Boy Julius
Jurnal Teknologi Mineral dan Batubara Vol 19 No 3 (2023): Jurnal Teknologi Mineral dan Batubara Edisi September 2023
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol19.No3.2023.1365

Solomon Sengon (Paraserianthes mollucana (Miq.) Barneby & J.W. Grimes) is a plant species in land reclamation activities for former coal mines. This is because Solomon sengon has advantages including: very fast growth, adaptive to extreme environments, and quite high economic and ecological values. Former coal mining soils are generally degraded and have low organic matter content, essential nutrient availability, CEC, and base saturation. These conditions do not support optimal plant growth. The aim of this study was to examine the effect of NPK plus humic acid fertilizer on several soil chemical properties and the growth of the Solomon sengon plant. This research was carried out in the coal mining concession area in Amplelu Mudo Village, Tembesi District, Batang Hari Regency, Jambi Province. The study used a randomized block design (RBD) with doses of NPK plus humic acid fertilizer in 9 levels and repeated 3 times, so there were 27 plots or experimental units. The observed variables were: pH, Al-dd, available-P, K-dd, height increase, diameter increase and root dry weight. The results showed that the application of NPK fertilizer 100 g plus humic acid 20 g/plant hole (P5) was the best treatment in improving soil K-dd with an increase in plant height of 110.83 cm, diameter of 28.65 mm and BKA of 10.63 g , there was an increase in the height of the Solomon sengon plant by 101.21%, diameter by 65.13% and BKA by 75.12% compared to the administration of 50 g NPK plus 10 g humic acid (P1). Increasing the dose of NPK and humic acid from 50 g of NPK plus 10 g of humic acid to 100 g of NPK and 20 g of humic acid has the potential to significantly increase the growth of the Solomon sengon plant.

PERENCANAAN TEKNIS PENANGANAN LUMPUR DARI SUMP PIT SELATAN MENUJU DISPOSAL DI PT CARITAS ENERGI INDONESIA SITE PT BJL Putra, Tommi Mandala; Yulanda, Yudi Arista; Lagowa, Muhammad Ikrar
Jurnal Inovasi Pertambangan dan Lingkungan Vol. 4 No. 2 (2024): Jurnal Inovasi Pertambangan dan Lingkungan
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jipl.v4i2.42559

Lumpur yang terbentuk di area sump pit tambang terbuka menimbulkan risiko ketidakstabilan operasional dan membutuhkan solusi pengelolaan yang efisien. Penelitian ini dilakukan untuk merencanakan pemindahan lumpur dari sump pit selatan menuju disposal di PT Caritas Energi Indonesia site PT Batubara Jambi Lestari. Dengan menggunakan metode Universal Soil Loss Equation (USLE), volume lumpur yang terbentuk diperkirakan mencapai 1789 meter kubik per bulan. Selain itu, dilakukan perancangan teknis sliding pad, tanggul kolam, dan kolam penampungan lumpur (mud cell) untuk meminimalkan risiko dan meningkatkan efisiensi penanganan lumpur. Desain sliding pad dibuat dengan dimensi yang sesuai untuk mengalirkan lumpur secara gravitasi sehingga aman untuk alat yang bekerja, sedangkan kolam penampungan lumpur (mud cell) memiliki kapasitas 5500 meter kubik. Untuk pemindahan lumpur, kombinasi dua unit excavator Komatsu PC300 dan tujuh unit dump truck Scania 380P sebagai alat hauler, waktu yang dibutuhkan pada kegiatan pemindahan lumpur dari sump ke disposal, disesuaikan dengan alat mekanis yang ada yaitu selama 12,9 jam.

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