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All Journal PROMINE Jurnal Inovasi Pertambangan dan Lingkungan Bandung Conference Series: Mining Engineering
Rully Nurhasan Ramadani
Jurusan Teknik Pertambangan, Fakultas Teknik Universitas Islam Bandung.
Control & Systems Engineering Earth & Planetary Sciences Energy Engineering Environmental Science Materials Science & Nanotechnology

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Journal : PROMINE

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Studi Pengaruh Bentuk dan Kemiringan Permukaan Pilar Terhadap Kekuatan dan Faktor Keamanan Pilar Rully Nurhasan Ramadani; Iswandaru Iswandaru; Ridho K. Wattimena; Made A Rai
PROMINE Vol 7 No 1 (2019): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (406.786 KB) | DOI: 10.33019/promine.v7i1.1055

Abstract

Study of stability and pillar failure mechanism with a variety of methods have beencarried with empirical and analytical approach. H. Moomivand dan V.S. Vutukuri in 2008 doto research with physical model of coal cubic with ratio of 0,25 to 10 with surface of pillar ishorizontal, this research aims to investigated changes in the ratio of pillar on compressivestrength and pillar mine failure mechanism, to study the relationship do the physical modellingwith 5 variations of height of 5 cm – 40 cm each pillar geometry has 7 variatons inclinedsurface 0o-30o. Samples of the pillar of testing with direction of the axial load on the body pillaruntil failure. Other than that do to 2D numerical modelling with finite element methods withassisted of software Phase2 (Rockscience). Physical modelling result showed the value ofthe compressive strength and the strength of pillar will be increased with the increasing ratioof pillars w/h. Effect of change in the inclined surface pillar to the compressive strength andpillar of strength showed no behavioral changes in the compressive strength and the strengthof the pillars to change the angle of the surface of the pillar. Changes in strength factor andsigma 1 showed decreasing of the value when the angle of the pillar is increasing eventhough the changes in the value of the numerical modeling results are not significant.
Peningkatan Nilai Tambah Mineral Kalsit Menjadi Barang Seni Lampu Hias Rully Nurhasan Ramadani; M. Imam Aga Dinata; Eka Adhitya; Himawan Nuryahya; Sri Widayati
PROMINE Vol 9 No 2 (2021): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Sains dan Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v9i2.2519

Abstract

Abstract Increasing the added value of rock and minerals can provide benefits to the wider society. The policy conservation of minerals, which has a focus on optimizing benefits and minimizing negative impacts of mining activities. Framework of optimizing the benefits of minerals, there are efforts, maintenance, protection, mining and processing as well as increasing the added value og these minerals. Calcite mineral (CaCO3) a part of the carbonate mineral group as one of the main composition mineral of limestone. The utilization of this calcite mineral is reviewed based on the quality of the physical and chemical properties. In principle, this research utilize the physical properties of the mineral because the chemical quality is relative low. Trial and error method is used in this study to getting the right design of art. The processing is simple and doest not require high technology and certified skills, by utilizing the transparency, color, and gloss properties of the mineral calcite will become an art item that has added value when given lighting. Keywords: Calcite, Added Value, Art Items, Decorative Lighting
Co-Authors Eka Adhitya Eka Adhitya Kurniawan Firman Firdaus Has Himawan Nuryahya Indra Karna Wijaksana Iswandaru M. Imam Aga Dinata Made A Rai Ridho K. Wattimena Solihin Sri Widayati