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Contact Name
Dr. Masagus Ahmad Azizi, ST, MT
Contact Email
masagus.azizi@trisakti.ac.id
Phone
-
Journal Mail Official
masagus.azizi@trisakti.ac.id
Editorial Address
Komplek Rukan Crown Palace Blok D No. 9 Jl. Prof. Dr. Soepomo, SH No. 231 - Tebet Jakarta Selatan 12870 email: jurnal.perhapi@gmail.com
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Kota adm. jakarta selatan,
Dki jakarta
INDONESIA
INDONESIAN MINING PROFESSIONALS JOURNAL
ISSN : 27148823     EISSN : 27159035     DOI : https://doi.org/10.36986/impj.v1i1.6
Core Subject : Engineering,
This Journal is published periodically two times annually : April and October, containing papers of research and development for mineral and coal, including Mining Exploration, Surface Mine System and Operation, Underground Mine System and Operation, Geotechnical, Mine Safety and Mine Environment, Mine Management, Mine Ventilation, Mineral and Coal Economics, Coal and Mineral Processing and Smelting, Metallurgy, Coal and Mineral Trading, Mining Law and Policy, Mining CSR and Community Development, and Technology and Innovation in Mining. The editors only accept relevant papers with the substance of this publication.
Articles 27 Documents
Analysis of Carbon Monoxide Gas Dilution on Horizontal Tunnel Front using Laboratory Scale Physical Model Addien Wisnu Harnoko; Nuhindro Priagung Widodo; Ahmad Ihsan
Indonesian Mining Professionals Journal Vol 1, No 1 (2019): NOVEMBER
Publisher : PERHAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36986/impj.v1i1.10

Abstract

Potential hazards that often occur in underground tunnels are dangerous and toxic gases, one of which is carbon monoxide (CO) which can be found in underground tunnels for example as a result of imperfect detonation on work surfaces. CO gas is very poisonous so it can cause death. This study aims to determine the spread of CO gas when diluting with tunnel ventilation in the horizontal front. This research was conducted on a physical model of the laboratory with a ratio of 1:10 compared to the actual tunnel, that is at the cross section of the model in the laboratory 40 cm x 40 cm. The effectiveness of dilution or dilution is indicated by the value of the diffusion coefficient, where the greater the diffusion coefficient, the more diffused the CO gas concentration, so the faster the CO gas concentration decreases. The parameters of the test conditions are the ratio of the duct to face distance (L/D) and the Reynolds number (Re) which shows the variation of air velocity in the tunnel work surface. Test results from the distribution of CO gas showed the influence of the configuration of the forcing duct and exhausting duct distances on the working front to the CO gas dilution. In this study also found the influence of Reynolds numbers on the value of the diffusion coefficient, that the greater the value of Re, the greater the value of E.
Stability Analysis of the Nanjung Water Diversion Twin Tunnels based on Convergence Measurement Simon Heru Prassetyo; Ganda Marihot Simangunsong; Ridho Kresna Wattimena; Made Astawa Rai; Irwandy Arif; Nuhindro Priagung Widodo; Dhika Noor Pradhana; Dimas Agung Saputra
Indonesian Mining Professionals Journal Vol 1, No 1 (2019): NOVEMBER
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36986/impj.v1i1.11

Abstract

This paper focuses on the stability analysis of the Nanjung Water Diversion Twin Tunnels using convergence measurement. The Nanjung Tunnel is horseshoe-shaped in cross-section, 10.2 m x 9.2 m in dimension, and 230 m in length. The location of the tunnel is in Curug Jompong, Margaasih Subdistrict, Bandung. Convergence monitoring was done for 144 days between February 18 and July 11, 2019. The results of the convergence measurement were recorded and plotted into the curves of convergence vs. day and convergence vs. distance from tunnel face. From these plots, the continuity of the convergence and the convergence rate in the tunnel roof and wall were then analyzed. The convergence rates from each tunnel were also compared to empirical values to determine the level of tunnel stability. In general, the trend of convergence rate shows that the Nanjung Tunnel is stable without any indication of instability. Although there was a spike in the convergence rate at several STA in the measured span, that spike was not replicated by the convergence rate in the other measured spans and it was not continuous. The stability of the Nanjung Tunnel is also confirmed from the critical strain analysis, in which most of the STA measured have strain magnitudes located below the critical strain line and are less than 1%.
Prediction of Material Volume of Slope Failure in Nickel Surface Mine Using Limit Equilibrium Method 3D Masagus Ahmad Azizi; Razak Karim; Irfan Marwanza; Muhammad Kemal Ghifari
Indonesian Mining Professionals Journal Vol 1, No 1 (2019): NOVEMBER
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36986/impj.v1i1.13

Abstract

PT X had an accident  of slope failure that caused fatalities and injuries experienced by labor mining, and also some heavy mining equipments  buried  by  materials  that causing companies got financial loss. therefore important to analyze the slope stability of surface mining operation, and predicting total volume of slope failure to anticipate the impact of fatalities/ injuries and financial risks. This research  aim is  to analyze  slope stability before failure conditions, predicting volume of slope failure, and determine position of critical zone using limit equilibrium “Simpilfied Bishop” method 3-dimensional, then doing validation with calculation of actual volume by comparing results of topography maps before and after failure using the cut and fill method. From the result of research, the slope on unstability conditions, actual and predicted volume of  slope failure is  8,629 m3 and 10,559 m3, so percent of calculation error is 18.3% .
Activated Sludge Technology to Treat Wastewater from Offices and Residential Areas PT Kaltim Prima Coal Kris Pranoto; Widia Rahmawati Pahilda; Muhammad Sonny Abfertiawan; Apridawati Elistyandari; Andi Sutikno
Indonesian Mining Professionals Journal Vol 1, No 1 (2019): NOVEMBER
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36986/impj.v1i1.14

Abstract

In Indonesia, coal mining operations generally involve a huge number of workers. This condition causes its own challenges in managing environmental impacts that potentially generated from human activities. One of them is domestic wastewater. Domestic waste water is waste water that comes from activities of daily living of humans related to water usage. In mining operations, domestic wastewater is generated from office and residential areas. Because of the potential impact on the environment, domestic wastewater must be treated before flowing to natural water bodies. Since the beginning of mining operations in 1990s, PT Kaltim Prima Coal has been building and operating Domestic Wastewater Treatment Plant (IPALD) to treat domestic wastewater resulting from offices and residential areas. There are 12 IPALDs with activated sludge technology operating in the PT KPC area. Active sludge is one of the domestic wastewater treatment technologies by utilizing the role of aerobic bacteria to degrade organic material contained in domestic wastewater. This paper is presented to describe the performance of activated sludge technology usedin the KPC’s IPALD and the challenges faced in its operation. One of the challenges faced is the fulfillment of water quality standards in Minister of Environment and Forestry Decree No. P. 68 of 2016 concerning Domestic Wastewater Quality Standards. The latest quality standards regulate the effluent concentration of IPALD more stringent than before and there are new parameters, including ammonia which requires attention in the operation of IPALD.
PENINGKATAN KOMPETENSI KARYAWAN DAN SAFETY CULTURE MELALUI LEARNING MANAGEMENT SYSTEM “SINTESIS+” SEBAGAI KONTROL OPERASIONAL Chandra Singgih Pitoyo; Yuristian Yuristian; Cahyo Andrianto; Riza Rahmah Angelia
Indonesian Mining Professionals Journal Vol 1, No 1 (2019): NOVEMBER
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36986/impj.v1i1.15

Abstract

With 118.400 hectare of concession area and employed people for more than 21.694 employees within company and from business partners, Berau Coal needs to put more concern in managing operational and health, safety and environment (SHE). The challenges that need to be faced are location that scattered into 4 operational areas, limited time for employess to access information because most of time exploitated for working, various educational background, and technology literacy. Berau Coal has been developed a learning platform, named SINTESIS+ and SID. The aims in development of those platforms are; (1) as a operational and HSE-themed learning platform, (2) toincrease capacity and to build HSE and operational competencies, (3) to increase operational control for competencies related to entry permit, work permit, license, and specialization, and (4) to intervene employees’ behaviour to build safety culture. Features and contents that has been embedded in SINTESIS+ are online learning with multimedia materials, online testing with real time result, webinar, incident and mining operational news, repositories for employees’ portfolio, event and training registration, integrated with SID to recordemployees’ historical competency-related data, and sustainable process to increase HSE awareness. Since its launching, SINTESIS+ has been accessed by 7867 employees, tested for 1024 exams, conducted webinar that participated by 330 employees, and run more effective and efficient processes. Impacts from integration process with SID are the increase of compliance level for competencies to 98% and the increase of process control efficiency. With those increments, beside the employees’ compency and HSE awareness is increased, hoped to lower incident rate. In the future, to improve access to the platform, Berau Coal is willing to develop mobile apps forSINTESIS+.
Implementation Of Permen Esdm No. 17/2012 As A Solution Between Mineral Businessesand Conservation Karst Zone In Indonesia Aris Dwi Nugroho; Tantan Hidayat; Muhammad Wachyudi Memed
Indonesian Mining Professionals Journal Vol 1, No 1 (2019): NOVEMBER
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36986/impj.v1i1.6

Abstract

Cement is powder made from lime and other materials used to make concrete, glue bricks or make walls (KBBI, 2008). Cement is a material that is hydraulic in nature, that is, a material which will undergo a hardening process in its mixing with water or acid solution. The raw materials for making cement include: clinker / slag of cement as much as 70% - 95% (the results of the combustion of limestone, silica sand, iron sand and clay), 5% gypsum and other additional materials (limestone, pozzolan, fly ash and etc). Along with the increase in infrastructure development which is the focus of the Government at this time, the need for building materials, especially cement, has increased. This increase in demand has made cement companies increase production, which in turn will also reduce the limestone reserves that exist in nature. Geological resources consist of mineral resources, energy resources, water resources, and landscapes.  Limestone  as  one  of  the  dominant  raw  materials  for  making  cement  is  a  mineral  and landscape resource that must be protected. The Ministry of Energy and Natural Resources since 2012 has issued regulations relating to the use and protection of Karst Landscape Areas (Permen ESDM No. 17 of2012). Protection of the Karst Landscape Area aims to protect its function as a natural regulator of the water system and its unique / scientific value in the development of science. Meanwhile, the delineation of utilization efforts as minerals and industrial raw materials is regulated so that it does not disturb the conservation zone. Expected with the regulations (Permen  ESDM No. 17 of 2012) can be a solution for the use and protection of the Karst Landscape in Indonesia.
Geotechnical Study of The Impact of Groundwater Level For Slope Stability in Coal Mine Jioni Santo Frans; Muhammad Hafizh Nurfalaq
Indonesian Mining Professionals Journal Vol 1, No 1 (2019): NOVEMBER
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36986/impj.v1i1.7

Abstract

Rock mass has force equilibrium which can be disturbed due to changes in rock mass conditions, both by naturally as well as human activities. In response, rock masses could have instability to reach new equilibrium and trigger landslides. Unstable slopes will affect the safety, economic and social factors. Groundwater has its own problems in mining management. Pore water pressure can cause uplift force and reduce the strength of the rock mass forming slopes and affect the slope stability. The study area has groundwater level relatively close to surface and causes the slope to be in nearly saturated condition. This research aims to study of the effect of groundwater levels on the stability of coal mine slopes in the study area. The research method includes collecting primary data through field observations to collect related technical data and secondary data collection through literature studies. Slope stability analysis was carried out to obtain recommendations with a minimum Safety Factor of 1.30. The results showed the ground water level has an inverse relationship to Safety Factor value. The recommendation is  depressurisation using drain holes. The target of groundwater level reduction in the mine wall is RL+40 in the sidewall area and RL+65 in the highwall area. Another alternative is is by resloping the overall slope angle of the mine wall in the study area. The mine slope is recommended for layback with an overall slope angle of around 24 °.
Linier Superposition Analysis on Managing Blasting Ground Vibration in Coal Mining Dhion Pradatama; Chani Pradasara; Syarif Nurdiansyah
Indonesian Mining Professionals Journal Vol 1, No 1 (2019): NOVEMBER
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36986/impj.v1i1.8

Abstract

One of the blasting process effect is ground vibration. Ground vibration currently consider as waste energy which it can infere and be an issue to the environment. PT. Multi Nitrotama Kimia as blasting service and explosives sales in Indonesia has customers dealing with that issues, one of them is PT Adaro Indonesia. To overcome the issue, engineering approach is done to the ground vibration by changing waste energy into work energy with the principle of linear superposition using the signature hole analysis (SHA) method to minimize the ground vibration. Researches and experiments are carried out using the Signature Hole Analysis (SHA) method to record wave propagation in each range of certain blocks - strips to the concern area. The recorded waves are analyzed with the Linear Superposition feature to obtain delay time recommendation along with the predicted vibration. The recommended delay time obtained is the delay time on inter-hole and inter-row which will be applied for next blasting.Based on the Signature Hole Analysis method, the recommended delay time given can be applied to accommodate the linear superposition wave principle. Its application can be optimized using inter-deck delay to minimize ground vibration produced. Its proven by ground vibrations produced using the recommendations always below the specified standard (PVS = <2.00 mm / s).
Vibration Management for Slope Stability with “Signature Hole Analysis” Method in Open Pit Blasting Activity Muhammad Syafiq Isnaya; Muhammad Fadil Bellico; Dwi Agung Priyanggoro
Indonesian Mining Professionals Journal Vol 1, No 1 (2019): NOVEMBER
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36986/impj.v1i1.9

Abstract

One of the impact blasting activity is Ground Vibration which will affect the stability of the slope. Research and experiment conducted using Signature Hole Analysis (SHA) for monitoring wave propagation in each block-strip used to model and predict vibration which caused by the blasting activity. Signature Hole Analysis combined with Scaled Distance has succeeded in becoming the solution of ground vibration management.
Dynamic Analysis of Blasting Effect on Nanjung Tunnel Stability Alio Jasipto; Nuhindro Priagung Widodo; Ganda Marihot Simangunsong; Simon Heru Prasesetyo; Made Astawa Rai; Dhika Noor Pradhana; Dimas Agung Saputra
Indonesian Mining Professionals Journal Vol 2, No 1 (2020): April
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36986/impj.v2i1.17

Abstract

This study aims to dynamically analyze blasting conducted in the Nanjung tunnel. Nanjung Tunnel is a twin tunnel that has a horseshoe-shaped section with each tunnel having a dimension of 10.2 m x 9.2 m, and 230 meters in length. The layers rock of this tunnel include silty clay, sandstone and dacite. Blasting was carried out on one of the tunnels consisting of dacite rock, having a 75-90% RQD and UCS 49-61 MPa. During the blast, PPV measurements were taken at several points around the tunnel using a minimate.Dynamic analysis is done by building a Nanjung Tunnel model on the RS2 software with the finite element method. Input data in this modeling is endeavored to approach actual conditions in the field, such as tunnel geometry, rock mass properties, and blasting plans carried out at STA 30-32 tunnels 2. This modeling is expected to produce PPV that is close to actual PPV and the results of this model will be continued to the stability analysis tunnel 1.Modeling results indicate that the tunnel 1 condition is stable during blasting. The stability of tunnel 1 based on smallest strength factor on the roof is around 2.6. Stability also seen from the strain level in dacite and sandstone rocks which are 0.07% and 0.38%. These strain levels are still permissible according to the Sakurai strain level diagram, 1983.

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