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All Journal Prosiding Seminar Teknologi Kebumian dan Kelautan (SEMITAN Journal of Earth and Marine Technology (JEMT)
Berhitu, Theo
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Physics Transportation

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PENGARUH PELAPUKAN TERHADAP KEKUATAN BATUAN ANDESIT Tamanak, Melkianus .A; Berhitu, Theo; Ode, Dandi Gusti; Cahyono, Yudho Dwi Galih
Prosiding Seminar Teknologi Kebumian dan Kelautan Vol 2, No 1 (2020)
Publisher : Prosiding Seminar Teknologi Kebumian dan Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (553.078 KB)

Abstract

Batuan adalah kompleks atau kumpulan dari mineral sejenis atau tidak sejenis yang terikat secara gembur ataupun padat. Ada beberapa jenis batuan salah satu batuan yaitu batuan andesit dimana batuan ini merupakan salah satu jenis batuan beku. Batuan andesit merupakan batuan intermediet yang terjadi hasil pendinginan magma pada permukaan bumi ataupun aktivitas gunung api akibat perbedaan suhu pada saat pendinginan. Ada beberapa faktor yang dapat mempengaruhi kekuatan batuan diantaranya adalah faktor pelapukan batuan. Pada penelitian ini bertujuan untuk menganalisis perbandingan kekuatan batuan andesit fresh atau yang belum dipengaruhi oleh pelapukan dan batuan andesit lapuk atau yang sudah di pengaruhi oleh pelapukan. Penelitian ini dilakukan dengan metode pengamatan di lapangan secara langsung dan di laboratorium untuk pengujian kuat tekan dengan menggunakan UCS (Uniaxial Compressive Strength). Beberapa sampel batuan andesit yang di ambil dari bekas tambang batu pasir di Desa Manduro, Kecamatan Ngoro, Kabupaten Mojokerto, Provinsi Jawa Timur. Berdasarkan pengujian UCS di peroleh hasil kuat tekan batuan pada sampel batuan andesit lapuk 01 sebesar 42,35 MPa, sampel 02 sebesar 41,07 MPa, sampel 03 sebesar 39,12. Sedangkan hasil kuat tekan batuan pada sampel batuan andesit fresh 01 sebesar 115,15 MPa, sampel 02 sebesar 72,73 MPa, sampel 03 sebesar 78,24 MPa. Dari hasil tersebut dapat di simpulkan bahwa perbedaan nilai kuat tekan pada batuan andesit dapat dipengaruhi oleh pengaruh pelapukan.
Mining design and short-term production scheduling by using 3D modeler in Coal mining at PT. Internasional Prima Coal, Palaran District, Samarinda City, East Kalimantan Province Berhitu, Theo; Fanani, Yazid; Cahyono, Yudho Dwi Galih
Journal of Earth and Marine Technology (JEMT) Vol 2, No 2 (2022)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2022.v2i2.2885

Abstract

PT. International Prima Coal is a subsidiary of a combination of two companies, namely PT. Bukit Asam (Persero) Tbk and PT. Mega Raya Kusuma which is engaged in coal mining in East Kalimantan, with an area of 3,238 hectares of Mining Business Permit in Bantuas and Handil Bakti Villages, Palaran District, Samarinda City which is planning to open a new block, namely North Eagle 3 block for the sustainability of coal production. This is the background for the author to research mining design and production schedule. This study aims to analyze resources and reserves, design mining, determine the combination of tools and monthly production scheduling. The research method used is qualitative and quantitative methods. the quantitative method will produce data such as the value of resources and reserves, slope geometry, SR (Stripping Ratio), and the amount of production per month. The qualitative method will produce data such as haul road designs, mining methods, mining sequences. Based on the results of modeling of coal deposits in the northern pit eagle 3 has 3 seams (Q050, Q070, Q080) with a total measured resource calculated by the polygon method is 726,898 tons. The design of the mining pit limit at an elevation of 0 masl is the contour of the Q070 seam structure with a total coal reserve of 66,516 tons and OB 651,952 bcm with SR 10. The haul road is made of 2 lanes with a straight road width of 9 m and a bend road width of 18 m. The form of drainage that is made is a channel with a trapezoid shape and a settling pond. The mining method used is open pit with down-dip excavation. Mining sequences and production schedules are divided into 4 mining sequences to obtain a production target of ±16,000 tons/month.
Co-Authors Fanani, Yazid Ode, Dandi Gusti Tamanak, Melkianus .A