Indonesia Conference Directory

Corresponding Author
Dudi Nasrudin Usman

Institutions
*) Mining Engineering Department, Faculty of Technology, Bandung Islamic University
**) Cibaliung Sumberdaya Corporation, Gold Mining Site

Abstract
One of the impacts of the mineralization zone is the potential for the formation of acid mine drainage, especially in the Cibaliung gold mineralization area and its surroundings, Pandeglang Regency, Banten Province. This study aims to identify the potential for acid mine drainage formation in overburden in the gold mineralized zone. The methodology used is mapping the distribution of cover rock both surface and subsurface using drill data, surface geological mapping, and mapping of the distribution of gold mineralized zones. Acid water formation tends to be intense in mining areas. This is due to the presence of sulfide-containing materials in free air. Acid-forming sulphide minerals include pyrite (FeS2), marcasite (FeS2), picolite (FexSx), chalocytes (CuS), covellite (CuS), chalcopyrite (CuFeS2), molybdenite (MoS), mulenite (NiS), chalocytes (CuS), covellite (CuS), chalcopyrite (CuFeS2), molybdenite (MoS), mulenite (NiS), chalocytes (CuS), chalcopyrite (CuFeS2), molybdenite (MoS), mulenite (NiS), galena (PbS) ) and sphalerite (ZnS). The results of the study showed that there were significant differences between mineral content (Au, Ag, Cu, Pb, Zn, and As) in the Breccia to Andesitic (BRAN), Quartz Vein (VEIN) and Breccia Vein (VNBR) mineralized zones. The content of a precipitate indicates the presence of elements of Cu, Pb, Zn and As in the mineralization into the potential formation of acid mine drainage in a zone of sulphide mineralization. There are 3 lithology zones, namely BRAN, VEIN and VNBR. The results of the study showed the As element became the distinguishing mineral element between VEIN and VNBR, but not for BRAN and VEIN and BRAN and VNBR, were for the pair there was no difference, meaning that the formation and mineralization process could be considered the same. This shows that the As element is one of the dominant elements present in the gold mineralization zone which has great potential for acid mine drainage.

Keywords
Mine Acid Drainage; Cibaliung; Gold Mineralization; and Bed Rocks.

Topic
Mining Engineering

Link: https://ifory.id/abstract/daXRJuVrveyU

Corresponding Author
indra karna wijaksana

Institutions
Bandung Islamic University

Abstract
Many exposed rocks show well-defined fabric elements in the form of bedding, stratification, layering, foliation, fissure, or joint. In general, these rocks have properties (physical, dynamic, thermal, mechanical, and hydraulic) that vary with direction and are said to be inherently anisotropic. Evaluating anisotropic mechanical properties helps to predict the behavior of rock materials in analysis, design, and construction, and improves the quality and safety. This research discussed laboratory testing and analytical methods to determine the four values of elastic constants of transversely isotropic slate rock. Analytic calculations were performed to determine the elastic constants of rock material with the assumption of linear, elastic, homogeneous, and transversely isotropic. The strain value was determined at of 50% of peak stress on stress-strain curves. Multilinear regression analysis with least squares estimation method was used in determining the linear equation to get to the four elastic constants of the rock. In this study, the rock used as an example in laboratory tests obtained from two pieces of slate stone blocks from the Bora river, Central Sulawesi Palu area. These rocks have foliation that appears on the surface, and therefore these rocks will be treated as a transversely isotropic material. The results of uniaxial compression tests revealed that for the slate rock, the deformability in the direction that is normal to the plane of transverse isotropy (θ = 85o) is greater than that is parallel to the plane of transverse isotropy (θ = 5o) or, in other words, E1 > E2.

Keywords
transversely isotropic rock, elastic constants, uniaxial test

Topic
Mining Engineering

Link: https://ifory.id/abstract/YNZ84ctm7njx

Corresponding Author
Linda Pulungan

Institutions
Faculty of Engineering, Bandung Islamic University
*)linda.lindahas[at]gmai.com

Abstract
The development of mining industry sector causes some negative impacts on the environment. One of them is water pollution in the area surrounding the mining location. To reduce the impact, monitoring and management of water waste quality is one of the important things to do, to ensure the quality of tailing from flotation reach the tailings quality standard and has no impact on sea water. In this research analyzed the quality standard of tailings from flotation and quality standard of sea water in PT Amman Mineral Nusa Tenggara. The tailings quality standard analyze referring to Environment Minister Decision No. 92 in 2011. While the quality standard of sea water quality referring to Environment Minister Decision No. 382 in 2016. The parameter of tailings quality including pH, Solid Fraction, Density and Concentration of dissolved metal. Based on the results of the monitoring and management analysis, tailing from flotation that streamed to Teluk Senunu fill the quality standard of tailings . The results of sea water quality in Teluk Senunu filled the quality standard of sea water . Deep Sea Tailing Placement does not have negative impact, because the plankton ecosystem has increased in Teluk Senunu from beginning 1997 to 2016.

Keywords
Tailing, flotation, Concentration of dissolved metal.

Topic
Mining Engineering

Link: https://ifory.id/abstract/6ZvpzbqRJtmY

Corresponding Author
Noor Fauzi Isniarno

Institutions
(1). Teknik Pertambangan, Fakultas Teknik, Universitas Islam Bandung

Abstract
Groundwater has become one of the primary human needs. One of the human activities that utilize groundwater is industrial activities such as those in the Kalijati sub-district. The presence of several companies was allegedly disrupting groundwater balance because it stood in an area that was declared as a recharge area. However, there is a suspicion that the aquifer recharge area where they use groundwater is in the southern part of the Regency. For this reason, it is necessary to determine the aquifer recharge area to estimate the amount of groundwater potential. Determination of recharge zones is carried out by double ring infiltrometers test to determine infiltration velocity and hydraulic conductivity. The main potential recharge area for groundwater is an area that has a relatively fast infiltration speed to rather fast, high hydraulic conductivity to very high, and composed of rocks with good porosity. To determine the potential of groundwater, an analysis of local rainfall is carried out using Mononobe and Sherman equation. The results showed that the study area had infiltration velocities between 0.22 - 1.41 cm / minute and hydraulic conductivity between 0.02 - 0.69 cm / minute. The main potential groundwater recharge zones are in the West, North and Southeast part of the research area with a total area of 10,417.63 Ha with groundwater potential up to 82.923.623 m3/year.

Keywords
Grounwater, Infiltration, Unconfined Zone Aquifer

Topic
Mining Engineering

Link: https://ifory.id/abstract/WxGAvTU8VjNR

Corresponding Author
Linda Pulungan

Institutions
Faculty of Engineering, Bandung Islamic University
*) linda.lindahas[at]unisba.ac.id

Abstract
In general, coal quality parameters used are calories, moisture content, volatile matter, ash content, carbon content, sulfur content, size, etc. At the research location, there are 4 seams, including seam A1, seam A2, seam B and seam C. The next discussion is focused on mining activities seam C divided into 3 layers of coal stripping, namely layer 1, layer 2, and layer 3 with thickness each 2 meters each. In seam C identified 2 clay partings, with thickness 10 cm on layer 1 and 20 cm on layer 2. Based on the coal classification table for trade, the percentage change in the quality of coal from mining that shows a significant change is the ash content. The percentage change in ash content for each layer, 112.1%, 106% and 114%. The percentage change in ash content exceeds the range 37.5 - 60% (classified in the medium ash ). Efforts to mitigate changes in the quality of coal from mining are the implementation of selective mining by taking into account when mining the transition zone of the layer between the over burden layer and coal, separating the quality of different coal, and coal washing studies, to improve coal quality

Keywords
Coal Quality, seam, steam coal, ash content

Topic
Mining Engineering

Link: https://ifory.id/abstract/xLyj2JvfNuhZ

Corresponding Author
Yunus Ashari

Institutions
1) Mining Engineering – Unisba

Abstract
This research was conducted in Subang Groundwater Basin, West-Java, related to the prohibition of groundwater extraction in the Kalijati Industrial Park (KIP) area. This is because the area is considered as the reacharge zone of the groundwater basin. The purpose of this study is to determine whether KIP stands above the recharge zone or not, moreover, find out which part of the Basin that supplies groundwater aquifers of KIP. The method used in this study is applied of DRASTIC method using ArcGIS and conducting field research measuring the infiltration rate of soil formations at selected points in the Basin. The results of this study indicate that the KIP is indeed built on a recharge area, the soil where the KIP is established, has the ability to infiltrate rainwater. However, the results of more detailed observations of wellbore logs in this area, it is known that between the groundwater aquifer used in KIP and the infiltration zone of the ground surface is separated by impermeable clay layers. This ensures that there is no relationship between surface water infiltration and groundwater used by factories in the areas. Therefore, it is certain that the recharge area originates from other areas in the Basin.

Keywords
Aquifer, Recharge Area, Subang Groundwater Basin

Topic
Mining Engineering

Link: https://ifory.id/abstract/zRuELyZCv8Uj

Corresponding Author
Linda Pulungan

Institutions
Departement of Mining Engineering,
Faculty of Engineering, Islamic Bandung University

email : linda.lindahas[at]unisba.ac.id

Abstract
Gold processing activities along the Ciherang river use mercury. Monitoring and managing the impact of gold processing activities on the environment in accordance with the standard quality of wastewater quality of the Ministry of Environment No.202 Th.2004 concerning Wastewater Quality Standards for Gold and or Copper Ore Processing Activities. Monitoring the quality of waste water flowing into the river by observing water pH, TDS and mercury content. Environmental management is carried out by reducing the mercury metal content in wastewater, with the phytoremediation method using Eichhornia Crassipes. Monitoring is carried out at 5 different locations, wastewater out of gold processing, 2 locations at the settling pond and 2 locations at the river water. The results showed an increase in mercury content in settling pond 2, 0.525 mg / L and settling pond 3, 0.00903 mg / L. Environmental management with the Fitoremediation method day 0 Hg levels of 0.06284 mg / L, day 4 Hg levels produced to 0.01203 mg / L, day 8 the value of Hg levels 0.114 mg / L, the 12th day the value of the The resulting Hg 0.01267 mg / L

Keywords
Gold, Mercury, Phytoremediation Method, Eichhornia Crassipes

Topic
Mining Engineering

Link: https://ifory.id/abstract/yYxCPFuHAaX2

Corresponding Author
Noor Fauzi Isniarno

Institutions
Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Islam Bandung (UNISBA)

Abstract
In open mining systems, the most important problem in mining production activities is surface water management, where surface water management is an integrated water management activity with the aim of minimizing the negative influence of surface water which consists of mine drainage methods, mine drainage, sediment separation and control. Geographic Information Systems (GIS) can be used for hydrological analysis using spatial data, especially in calculating runoff discharges from surface water. The method used in calculating runoff discharge is in the form of daily rainfall data. This rainfall data can show the influence of the catchment area which is useful for knowing precisely and accurately the runoff water discharge. Geographic Information Systems (GIS) are used to calculate variables in rational formula equations by overlay analysis. Information about digital-based hydrological conditions is very useful as a means of decision making and policies undertaken in monitoring hydrological conditions in open mines. By using a geographic information system (GIS) with a geodatabase attribute, it can be used to view general conditions in a mining area in monitoring hydrological conditions. So it is very appropriate to be used as hydrological monitoring in the mining area in making decisions that are fast, precise and accurate. Apart from that the geodatabase attribute can see the actual conditions of a mining area.

Keywords
Geographic Information System (GIS), Hydrology, Mining

Topic
Mining Engineering

Link: https://ifory.id/abstract/vxUJYR9PFAbn

Corresponding Author
SOLIHIN SOLIHIN

Institutions
Prodi Teknik Pertambangan Fakultas Teknik Unisba

Abstract
The infiltration of hydrothermal solutions through structures that form veinlets with different alteration levels and variations in physical strength, will influence the consumption of grinding energy during processing operations. This research uses a gold ore vein sample from the Kutawaringin area, Bandung Regency. The sample, analyzed in the field by microscopic analysis, was tested in petrography and mineragraphy in the laboratory, so that it was found to be moderate and low alterated. By taking into account the mineral composition, especially the percent of quartz minerals which when tested for Bond Work Index samples of PO and FR codes require greater energy consumption than those of the GL and KA code samples. This condition has an impact on the selection of the type of grinding equipment, if the alteration of gold ore vein is far more than the low alteration, more feasible choices based on the most vein, so it is more energy efficient. Although it results in decreased grinded production per unit time for low alteration types.

Keywords
alteration, gold ore vein, petrography, mineragraphy, degree of liberation

Topic
Mining Engineering

Link: https://ifory.id/abstract/N4wg3tPzUTkY

Corresponding Author
Ngatijo Rinto Wiyono

Institutions
1) Departement of Chemistry, Faculty of Science and Technology, University of Jambi, Jl. Jambi-Muara Bulian km 15, Mendalo, Jambi 36361, Indonesia
*tijo52[at]yahoo.co.id

Abstract
Synthesis Silica Modified Quaternary Ammines (SMQA) and its application has been carried out on the adsorption of gold(III) ions in a batch system. SMQA material is synthesized through the SMA methylation reaction. SMA material is synthesized from Na2SiO3 and 3-Aminopropyltrimethoxysilane (3-APTMS). Furthermore, the replacement of the methyl group in [-N(CH3)3]+ will change to [-N+CH3{(CH2)3N+(CH3)3}2] called Silica Modified Quaternary Triammines (SMQT). SMQT is synthesized by watching SMA with 3-APTMS become SMT which is then refluxed for methylation process to form SMQT. Material characterization is carried out through identification of functional groups, surface morphological analysis, elemental composition and metal ion concentration. Adsorption process of metal anion [AuCl4]- obtained optimum results at pH 5 with a contact time of 100 minutes with an adsorption capacity of 77.58 mg/g and an efficiency value of 96.975%.

Keywords
SMQA, SMQT, Adsorption, Gold(III)

Topic
Mining Engineering

Link: https://ifory.id/abstract/G29YkPLdhKgq

Corresponding Author
Andrieanto Nurrochman

Institutions
1Bandung Islamic University, Mining Engineering Department, Bandung, Indonesia
2Mineral and Coal Technology Research and Development Centre, Bandung, Indonesia

Abstract
Lightweight concrete has been an interest due to its advantages compared to normal concrete. Lightweight concrete can be produced by the use of lightweight aggregates. In this study lightweight concretes were made with the composition of expandable perlite combined natural sand with each volume is 50% and concrete with 100% expandable perlite as the aggregates. The volume of the aggregates was varied from 80% up to 89%. The concretes were measured for their density and tested for the mechanical and absorption properties. As the results, expandable perlite obviously has the effect in reducing the concrete density. Nevertheless, the strength decrease as the expanded perlite aggregate increase. The optimum lightweight concrete that acceptable as the international standard is with the aggregates of expandable perlite combined natural sand having the 50% of each volume with the aggregates composition is 80%

Keywords
Lightweight concrete, expandable perlite, aggregates

Topic
Mining Engineering

Link: https://ifory.id/abstract/av7WCbd2LN83

Corresponding Author
Iswandaru iswandaru

Institutions
Universitas Islam Bandung

Abstract
Mining activities related to excavation or landfill will always face problems with slopes, both in the form of working slope and final slope, in addition the groundwater factor in the rock layer increases the burden by filling pores and reducing friction inter-grain influences the slope stability. The slopes must be analyzed for stability to prevent landslide hazards because they involve work safety, equipment safety, and smooth production. PT. XYZ is a coal mining company located in Sungai Lilin, South Sumatra, planning to optimize and stabilize the final slope to a depth of 120 m. Geotechnical drilling has been carried out as many as 3 points with a total depth of 270 m and 80 samples of rock and soil testing. The results of slope modeling using the Limit Equilibrium method, mining can be done up to a depth of 120 m with an angle of 30o and 35o with a dewatering system.

Keywords
Excavation, Optimization, slope stability, Limit Equilibrium Method

Topic
Mining Engineering

Link: https://ifory.id/abstract/mdn9JtaehVXE

Corresponding Author
Dudi Nasrudin Usman

Institutions
Mining Engineering Department, Faculty of Technology, Bandung Islamic University

Abstract
Gold deposits are economic deposits, the formation of gold deposits in nature is one of them epithermal gold deposits in the Au-Ag mineralized zone. Gold mineralization is influenced by a hydrothermal solution that flows through rock permeability, resulting in an alteration process that changes the chemical composition, mineralogy, and texture of the original rock. One variable that affects the presence of veins carrying valuable ore minerals is fracture structure. This study aims to determine and analyze the relationship /correlation of rock solids to the level of gold deposits using the correlation regression method. The methodology used is massive data collection through geological mapping, log-drill data analysis, Data Assay analysis, data processing and analysis assisted by using correlation regression through validation and verification of drill data. The results of processing and analysis of muscular data notified by the RQD value and log-drill data obtained the results of multivariate normality test based on the Au model = 8,219-2761 RQD and Ag = 90,388 + 0.977 RQD as follows: 1) When the RQD is zero, then the Au will be valued amounting to 8,219. However, when the RQD increases by 1 unit, the Au will decrease by 2,761. 2) When the RQD is zero, then Ag will be worth 90,388. However, when the RQD rises by 1 unit, then Ag will rise by 0.977. Then the Meaning Mean Test is performed where the result H0 is Received, with the understanding that there is a significant relationship between RQD on Au-Ag levels, understanding that the change in thickness of a thicker ore is followed by an increase in the higher Au level, tcount = 0.382 and the significance is 0.703. The understanding is that Au levels are correlated with the presence and presence of hefty that is notified by RQD.

Keywords
Au-Ag Mineralization, Correlation Regression, RQD and Grade of Gold

Topic
Mining Engineering

Link: https://ifory.id/abstract/uZX2K4CcQrHh

Corresponding Author
Dudi Nasrudin Usman

Institutions
Department Of Mining Engineering, Faculty of Technology, Bandung Islamic University

Abstract
This research was carried out in the Mount Mandalawangi region of West Java Province. The research objective is to explore the potential sources of springs in supporting the development of the region so as to encourage the economic potential of the community. The methodology used was geological mapping, spatial mapping, mapping of socio-economic conditions, mapping of water demand levels, which were evaluated using the Terrain Genetic Unit method. The area around Mount Mandalawangi is a relatively fertile area has ±36 points of springs, the discharge ranges from 0.00003 m3/sec-0.587 ltr/sec. The dominant lithology is the Mandalawangi (Qmm) Mountain consisting of glass tuffs containing pumice, and lava composed of pyroxene andesite to basalt. The results of the study using the Terrain Genetics Unit method there are 3 zones that have the potential to develop springs based on the region, Andesite Plateau, Corrugated Hills of Lapili Volcano and Corrugated Hills of Tuff Breccia Interferenc. The analysis is that regional development can be planned to the maximum by prioritizing the source of spring with a note that there needs to be an arrangement for the source of existing springs.

Keywords
Mount Mandalawangi, Terrain Genetics Unit, East Bandung and Spring Resources.

Topic
Mining Engineering

Link: https://ifory.id/abstract/bENBHUVqPR4y

Corresponding Author
Bagaraja Sirait

Institutions
Research and Development Centre For Mineral and Coal Technology (tekMIRA). Bandung

Abstract
UCG provides thermal effect on sedimentary rocks. Experiments on rocks, consisting of sandstone, siltstone and claystone are needed to study about their behaviour related to the effect of high temperature. The study aimed to investigate the behavior of the sedimentary rocks after heating and its influence on their strength. The experiments were carried out on laboratory scale. Rock specimens were heated at 50 – 6000C for 24 hours and tested with Uniaxial Compressive to determine the changes in rock strength. Measurements of geometric, density of the specimens and rock mass displacement analysis were performed. The specimens showed fractures because of the loss of water content. The most significant changes occured in sandstone specimens, the strength before heating was 15,64 MPa and increased to 41,70 MPa after heating. Claystone specimens was increased on the strength, from 6.76 MPa to 20.40 MPa. It revealed rock mass displacement 18.40 cm at the highest and 1.60 cm at the lowest (before heating). After heating, the rock mass obtained 9.45 cm (the highest) and 0.45 cm (the lowest). Results showed physical properties of specimens possed deflationary trends on their densities after heating treatment.

Keywords
thermal, sedimentary, rock,coal gasification, UCG

Topic
Mining Engineering

Link: https://ifory.id/abstract/JMYVyfb7NFpn

Corresponding Author
Dudi Nasrudin Usman

Institutions
*) Mining Engineering Department, Faculty of Technology, Bandung Islamic University
**) Statistical Science Departement, Faculty of Mathematics and Science, Bandung Islamic University

Abstract
Utilization of minerals is used for building as natural cement, it can also be used as material for making tile. Tile made from tras is expected to be a new competitor for mild steel, especially in terms of cost. This study aims to determine and analyze opportunities for improving the local economy of local communities in the use of tras deposits with appropriate technology and low cost. The methodology used is to identify the characteristics of tras deposits, conduct training to improve understanding of how to make tras and educate tile making technology. The need for tras for making tiles requires a characteristic of these deposits. The characteristics of tras deposits are as follows; the dominant minerals present in the tras are Ilmenite and Magnetite. The chemical elements contained in the Nagreg tras deposits are SiO2 49.15%, Al2O3 29.56, Fe2O3 4.52%, TiO2 0.45%, CaO 1.12%, MgO 0.94%, Na2O 0.12% and K2O 0.20%. Specific Gravity 2.6. This will be very important for the utilization process, the amount of excavated material will have an influence on the utilization plan, especially those that will utilize the community with the aim of increasing economic value and local economic circulation. The perception of local people on the use of tras deposits to increase community income is very high, this becomes a higher opportunity for the use of tras deposits that are able to support the local economy of the community so that it will encourage an increase in the welfare index of local communities

Keywords
Tras Deposits, Roof Tiles, Local Economy, and technology

Topic
Mining Engineering

Link: https://ifory.id/abstract/E4FbY7jLg2yu