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INDONESIA
Indonesian Mining Journal
Published by PUSLITBANG Teknologi Mineral dan Batubara
ISSN : 08549931     EISSN : 25278797     DOI : -
Core Subject : Science, Social, Engineering,
Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Engineering Environmental Science
This Journal is published periodically two times annually : April and October, containing papers of research and development for mineral and coal, including exploration, exploitation, processing, utilization, environment, economics and policy. The editors only accept relevant papers with the substance of this publication.
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue "Vol 10, No 1 (2007): INDONESIAN MINING JOURNAL Vol. 10 No. 1 February 2007" : 5 Documents clear
NUMERICAL MODELLING AND SLOPE STABILITY ANALYSIS FOR OPTIMIZING OPEN PIT COAL MINE AT BINUANG SOUTH KALIMANTAN I GDE SURATHA
Indonesian Mining Journal Vol 10, No 1 (2007): INDONESIAN MINING JOURNAL Vol. 10 No. 1 February 2007
Publisher : Puslitbang tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (563.771 KB) | DOI: 10.30556/imj.Vol10.No1.2007.626

Abstract

The objective of the numerical modelling study and slope stability analysis using the finite element method (FEM) is to determine the optimum pit slope design. Many simulations were carried out by varying the overall pit slopes and the depth of the open pit coal mines. The pit slope with a safe condition in stability and a reasonable waste-coal ratio was chosen as the optimum pit slope design. According to the result of this study, some revisions on the existing pit slope design are needed. It is also recommended to develop a monitoring system, especially for instability monitoring and groundwa- ter level fluctuations behind the slope surfaces that could threaten the slope stability.
STUDY ON UTILIZING FLY ASH FOR CASTABLE REFRACTORY I GUSTI NGURAH ARDHA; MUCHTAR AZIZ
Indonesian Mining Journal Vol 10, No 1 (2007): INDONESIAN MINING JOURNAL Vol. 10 No. 1 February 2007
Publisher : Puslitbang tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (782.946 KB) | DOI: 10.30556/imj.Vol10.No1.2007.627

Abstract

Fly ash could be utilized as alumina and silica sources material. It could be treated by the following processes of demagnetisation, sinterization, grinding, mixing with crushed bricks as well as fired cement to create acid based on castable refractory. Sinterization changes alumina and silica signifi- cantly into mullite. The standard measurement of pyrometric cone equivalent (PCE) is used to under- stand the temperature resistance of the studied castable refractory based fly ash. The temperature resistance seems to increase after contacting with high temperature at longer time or repeatedly until reaching its Si-Al stabilization phase.
COAL LIQUEFACTION IN INDONESIA: CURRENT STATUS AND FUTURE PROGRAMME NINING S. NINGRUM; BUKIN DAULAY
Indonesian Mining Journal Vol 10, No 1 (2007): INDONESIAN MINING JOURNAL Vol. 10 No. 1 February 2007
Publisher : Puslitbang tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (321.416 KB) | DOI: 10.30556/imj.Vol10.No1.2007.628

Abstract

The Presidential Decree No. 5/2006 and Presidential Instruction No. 2/2006 about Supply and Exploi- tation of Liquefied Coal as Other Fuel has instructed the interrelated department, including the Ministry of Energy and Mineral Resources, to bring about the development of coal liquefaction plant in Indone- sia, and make use of its product - in the form of oil fuel. To implement the instruction, the Coordinating Ministry for Economic Affairs issued Decision Letter, No. KEP-11/M.EKON/02/2006 about Coordina- tor of Team Action Programmed Supply and Use of Alternative Energy and KEP-01/D.III.M.EKON/02/ 2006 about Technical Coordinator Action Programme Supply and Use of Alternative Energy. Some activities that have been done by the coal liquefaction team in 2006 were the socialization of coal liquefaction to introduce the coal liquefaction technology to the investors. It is expected that the investors will be interested in investing their financial capital in the coal liquefaction.
THE EFFECT OF DISPERSING AND STABILIZING ADDITIVE ON THE STABILITY OF UPGRADED COAL WATER MIXTURE DATIN F. UMAR; BUKIN DAULAY; HIROMOTO USUI; YOSHIYUKI KOMODA
Indonesian Mining Journal Vol 10, No 1 (2007): INDONESIAN MINING JOURNAL Vol. 10 No. 1 February 2007
Publisher : Puslitbang tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (301.495 KB) | DOI: 10.30556/imj.Vol10.No1.2007.629

Abstract

The upgraded brown coal water mixture (UBCWM) stability with several dispersing and stabilizing additives was studied based on coal sedimentation time history. UBCWM was filled up in a settling column; which has four holes in the upper, upper middle, bottom middle and middle side to take samples. Results indicate that the addition of Naphthalene sulfonate formaldehyde condensate (NSF) as dispersant together with S-194 some kinds of bio polysacharide with long branches produced by Dainippon Pharmaceutical Co. Ltd. as stabilizer, produces UBCWM with the best stability compare with that by using polystyrene sulfonate (PSS) and polymethacrylate (PMA) together with carboxyl methyl cellulose (CMC) and S-60 also some kinds of bio polysacharide, but without branches pro- duced by Dainippon Pharmaceutical Co. Ltd . Even the addition of S-194 results UBCWM with good stability, from the economical point of view, the addition of S-194 is a problem. The price of S-194 is expensive, whereas CMC is abundant and cheap. Therefore, the use of CMC as stabilizing additive was also effective in preparing stable UBCWM according to the stability of the UBCWM by using S- 194 and CMC is not significantly different.
ASSESSMENT OF INDIGENOUS MICROORGANISM FOR NATURAL ATTENUATION OF ABANDONED MINE SITE SRI HANDAYANI
Indonesian Mining Journal Vol 10, No 1 (2007): INDONESIAN MINING JOURNAL Vol. 10 No. 1 February 2007
Publisher : Puslitbang tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (371.999 KB) | DOI: 10.30556/imj.Vol10.No1.2007.630

Abstract

Soil samples taken from an abandoned gold mine site in East Kalimantan exhibited high concentra- tion of manganese (9,830-13,190 mg/L), iron (340-8,060 mg/L) and arsenic (160-510 mg/L). However, the indigenous microbial population was found to be present at high level (> 107 CFU/g), indicated that the site matrix did not appear to be inhibitory and relatively favorable to microbial growth. Furthermore, laboratory microcosm studies showed that the indigenous microorganisms possessed a considerable bioremoval potential of contaminated metal at the site. Those results suggested that natural attenua- tion of metal bioremoval would occur under present site condition.

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