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Jurnal Mineral
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mineral.ubb@ubb.ac.id
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mineral.ubb@ubb.ac.id
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Gedung Dharma Pengabdian, Fakultas Teknik Universitas Bangka Belitung, Kampus Terpadu UBB, Balunijuk Provinsi Kepulauan Bangka Belitung
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Kab. bangka,
Kepulauan bangka belitung
INDONESIA
MINERAL
Published by Universitas Bangka Belitung
ISSN : 25407708     EISSN : 2620729X     DOI : https://doi.org/10.33019/mineral.v6i2
Core Subject : Science, Social, Engineering,
Earth & Planetary Sciences Energy Engineering Environmental Science Materials Science & Nanotechnology
The scientific journal called MINERAL is a scientific periodical publication of Mining Engineering Department , Bangka Belitung University, which is published every April and October in a year which the scope of Exploration (Geology and Geophysics), Geotechnical / Geomechanics, Minerba Processing, Minerba Management and Economics, Mining Environment, Reclamation and Post-Mining. This journal collaborates with Association of Indonesian Mining Professionals (PERHAPI) Center and Forum Komunikasi Program Studi Teknik Pertambangan se-Indonesia.
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Ilmu Bumi dan Planet (Lain-Lain)
Articles 12 Documents
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Search results for , issue "Vol 2 No 1 (2017): MINERAL" : 12 Documents clear
Evaluasi Produksi Kaksa Dalam Upaya Pencapaian TargetPemindahan Tanah Bulanan Sebesar 30.000 m3 DI TB.2.1 Tempilang, PT Timah (Persero) Tbk: Evaluation of Kaksa Production in Efforts of 30.000 m3 Earthmoving Monthly Target Achievementsin TB.2.1 Tempilang, PT Timah (Persero) Tbk Ramona, Pisca; Irvani, Irvani; Mardiah, Mardiah
MINERAL Vol 2 No 1 (2017): MINERAL
Publisher : Program Studi Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v2i1.1547

Abstract

Earthmoving target of 30,000 m3 in TB.2.1 Tempilang reached in March where production amounted to 36.350 m3, but the decline occurred in April at 1,83% with amount of production is 29.450 m3 and in May 46% with amount of production is 16,200 m3. Evaluation was conducted against the data rate of excavation In March until May, 2016. Other than that, evaluation of factors of production activities the influential hearts with how to calculate productivity tool for the reviews to know the tool's ability to produce kaksa, reviewing data that stop-time increasing production, the rate of rainfall, and sediment property value with the observe incision drill profile block in March, April, and May 2016. Based on the findings of evaluation, main factors failure achievement of production is time road experienced a decline of 05 hours during the month of April and 138 hours In May due to damage to the equipment and high rainfall reached 332 mm. Monthly soil removal target can be achieved with change hours number: Available 8 hours / day Being 10 hours / day.
Pengaruh Pengurangan Setting Time (Wait on Cement) pada Semen Tahan Api dengan Penambahan Oil Well Cement: The Effect of Reducing Setting Time (Wait on Cement) on Fire Mortar by Increasing Oil Well Cement Rahmadika, Bayu; Apriyanti, Yayuk; Irvani, Irvani
MINERAL Vol 2 No 1 (2017): MINERAL
Publisher : Program Studi Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v2i1.1548

Abstract

Underground Coal Gasification (UCG) is a technology to extract coal deposits in the form of gas from mineral deposit without disassembling of overburden. There are some initial processes in UCG, one of them is cementing to glue the casing into the formation. This research-based laboratory using cement mixture that consists of Fire Mortar as the main ingredients with added Oil Well Cement (OWC) by 40%, 42.5%, 45%, 47.5%, 50%, 52.5%, 55%, 57.5% and 60% of the total weight of the cement mixture. Cement samples were then tested with hydration heat test, furnace test at temperatures of 300°C to 900°C and UCS test of a sample at normal temperature as well as samples that have undergone combustion at a certain temperature. Composition of OWC>50% have faster setting time on the 29th to 40th hours with maximum hydration temperature of 34.4°C on the 11th to the 12th hour as well as getting the optimal composition of Fire Mortar which is 42.5% and OWC which is 57.5%. Composition of 50-60% Fire Mortar have a heat resistance to a maximum of 900°C so they don’t experience failure and cracks which make a sample split. Ofter than that, composition of 50-60% OWC on average have a greater compressive strength with the highest compressive strength value of 1.75 MPa at a temperature of 500°C.

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