Ditemukan 19 dokumen yang sesuai dengan query
Bandung: Directorate General of Mines, 1997
IMJ 2:3 (1996)
Majalah, Jurnal, Buletin Universitas Indonesia Library
The intrusive rocks of Gunung Parang and Gunung Bongkok appear to be boss shape. The intrusion lie physiographically at the Bogor zone, Purwakarta area, West Java. Petrographic features show that the rocks have good porphyritic textures, and primary minerals of plagioclase, pyroxene, and hornblende as phenocryst are in groundmass made...
IMJ 1:3 (1995)
Artikel Jurnal Universitas Indonesia Library
Separation and purification of yttrium from several rare earth elements available in rare earth mineral xenotime employing combined separation methods. In this study, rare earth mixtures and reagent grade synthetic materials were used instead of actual origin xenotime mineral samples. The concentration ration of each rare earth in the mixture...
IMJ 1:3 (1995)
Artikel Jurnal Universitas Indonesia Library
This paper attempts to clarify the position of geological and mining conditions at Ombilin in comparison with those in Australia and the UK by examining both the technical strategy and its efficiency. A summary of this review is made to facilitate judgments on long wall layouts and strata control matters...
IMJ 1:1 (1995)
Artikel Jurnal Universitas Indonesia Library
Over the years, explosives have been developed of various types and with special techniques. The situation is changing everyday; better, safer products are on the market with improved procedures for use. Simple common points which are often overlooked are stressed in this paper. Both fragmentation and safety can be improved...
IMJ 2:3 (1996)
Artikel Jurnal Universitas Indonesia Library
A potential coal deposit has been identified during detailed coal exploration campaign carried out by the Directorate General of Mines coordinating with the NEDO in Napal, Central Sumatera. Eight coal seams were found in the Upper Miocene formation, with horizontal dips. Considering the fact, a big open pit coal mining...
IMJ 1:2 (1996)
Artikel Jurnal Universitas Indonesia Library
The mineral content of Indonesian coal is typically low with the average of 5.2%. Pyrite occur in most coals but in areas currently being mined are low. Some of the Pasir and Berau coals in East Kalimantan have moderate to high sulphur content in some plies and this indicates some...
IMJ 1:2 (1996)
Artikel Jurnal Universitas Indonesia Library
An observation has been conducted to find weakness on jaw crusher made by Nagreg residents. This equipment was tested using limestone and granite rocks as the feed. The equipment has several weakness which can be modified such as jaw position, jaw surface, the unavailability of hopper in the upper mouth...
IMJ 3:1 (1997)
Artikel Jurnal Universitas Indonesia Library
S. Budi Utomo, author
Evaluasi terhadap pengusahaan pertambangan hatuhara arialab untuk mengetahui perkembangan penyelenggaraan usaha pertambangan uatubara di Indonesia. Hal ini dilakukan guna mendapatkan gambaran atas pasang-surutnya industri pertambangan batubara dalam rangka pelaksanaan Otonomi Daerah.
Pelaksanaan Otonomi Daerah akan memberikan kewenangan yang lebih luas kepada Pemerintah Kabupaten/Kota, yang lebih terbatas kepada Pemerintah Propinsi dan Pemerintah...
Depok: Fakultas Teknik Universitas Indonesia, 2003
T9556
UI - Tesis (Membership) Universitas Indonesia Library
Bandung: Department of Mining Engineering, ITB , 1992
R 622 PRO
Buku Referensi Universitas Indonesia Library
