scholarly journals Technical analysis of shovel working time towards inter-burden production achievement in open-pit coal mine

2021 ◽  
Vol 882 (1) ◽  
pp. 012055
Author(s):  
Vivi Sandra Wulandari ◽  
Mixsindo Korra Herdyanti ◽  
Pantjanita Novi Hartami
Keyword(s):  
Secondary Data ◽  
Working Time ◽  
Open Pit ◽  
Total Production ◽  
Mining Operations ◽  
East Kalimantan ◽  
Loading Method ◽  
Time Simulation ◽  
Time Variables

Abstract Shovel production can be affected by several factors, such as shovel working time and working conditions. The shovel production for the inter-burden removal target did not achieve at mining operations in Melak, East Kalimantan. This study’s main objective is to find the causes of the inadequate production and the efforts to improve. In this case study, the high delay due to the waiting for truck maneuvering caused the lack of shovel production. Some corrections were needed on the width of the loading point, and the loading method required to be replaced with double-side loading. Changes in the width of the loading point and loading method have an impact on increasing shovel productivity. In addition, a digger working time simulation is performed based on secondary data. Calculation of total production achievement is based on the simulation of time categories with working, standby, and repair time variables.

scholarly journals ANALISIS TINGKAT KEUNTUNGAN USAHA RUMAH TANGGA KUE LUMPIA DI KELURAHAN BUMI NYIUR KECAMATAN WANEA

2015 ◽  
Vol 11 (3A) ◽  
pp. 125
Author(s):  
Novel Novri Sumampouw ◽  
O. Esry Laoh ◽  
Lyndon R.J. Pangemanan
Keyword(s):  
Secondary Data ◽  
Primary Data ◽  
Government Agencies ◽  
Total Production ◽  
Benefit Analysis ◽  
Total Revenue ◽  
Case Study Method ◽  
Total Profit ◽  
The Village

The objective of this research is to to determine the level of profit from the Cake Lumpia households business in the Bumi Nyiur Village Wanea districts. The method used in this study is the case study method. The data used in this study are primary data and secondary data. Primary data were collected in the field directly from the source in this research is the owner of household enterprises cakes spring rolls, for the purpose of research and the data has not been published before. This data was obtained through interviews based on questionnaires that are relevant and have been prepared. As for the secondary data includes vil-lage profiles will be obtained from government agencies associated with this research. To determine the amount of benefit artisans will use a rat stamp benefit analysis followed by analysis of R / C to determine the feasibility of this venture. These results indicate that the average total revenue in this business is Rp. 1,000,000 / day, with a total production cost of Rp. 283,896.7. Then the total profit earned in spring roll pastry business in Bumi Nyiur Village, District of Wanea is Rp. 716,103.3 / day. Analysis of R / C who do show that the average household businesses spring rolls baking in the Village Earth Nyiur District of Wanea experiencing gains, where the R / C ratio of 3.52 and it can be concluded that the business is feasible to run.

Age-based maintenance for a fleet of haul trucks

2018 ◽  
Vol 24 (4) ◽  
pp. 511-528 ◽  
Author(s):  
Patarawan Chaowasakoo ◽  
Heikki Seppälä ◽  
Heikki Koivo
Keyword(s):  
Simulation Model ◽  
Design Methodology ◽  
Cost Control ◽  
Open Pit Mine ◽  
Open Pit ◽  
Total Production ◽  
Content Type

Purpose The most costly part in an open-pit mine is the transportation of material out of the mine. The efficiency of the truck-and-shovel fleet plays a major role in cost control. The paper aims to discuss these issues. Design/methodology/approach The truck dispatching simulation model with consideration of age-based maintenance is proposed. Findings This paper underlines an impact of truck dispatching decisions and reveals remarkable differences in the total production under different approaches of operational availability. Additionally, the simulated results introduce an effective scheduled maintenance for different truck age levels. Originality/value The approach is based on a case study taking into account the stochastic equipment behavior and environment in a real open-pit mine. This approach can be used more generally in situations in which truck fleets are used to transport material.

scholarly journals Analysis of Environmental Costs’ Effect in Green Mining Strategy Using a System Dynamics Approach: A Case Study

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Amir Jafarpour ◽  
Siamak Khatami
Keyword(s):  
System Dynamics ◽  
Large Scale ◽  
Mining Operation ◽  
Open Pit ◽  
Open Pit Mining ◽  
Processing Plant ◽  
Environmental Costs ◽  
Mining Operations ◽  
Factors Affecting

Nowadays, one of the most significant problems in mining activities is the significance of analyzing environmental issues along with mining, concentration, and mineral processing operations to achieve the goals of sustainable development. Nevertheless, mine owners refuse to include environmental costs (EC) and consider them unprofitable. Due to the ever-increasing importance of environmental and social topics in recent years, there is a vital need for assessing the EC and its impact on total mining costs and implementing green strategies by the mining managers and engineers. The current study tries to model the mining cost structure by considering the causal relationships between different factors affecting open-pit mining costs to highlight the EC’s role. Furthermore, this research evaluates the effectiveness of implementing each possible mining green strategy in a large-scale copper mine using the System Dynamics (SD) approach. In this regard, seven scenarios and a combination of different environmental strategies, including mine reclamation, an environmental strategy for a condensation and processing plant, and environmental mining operations, have been considered for the SD-based economic analysis. The simultaneous use of the green mining strategies for the concentration and processing plant (Scenario 4) shows a high impact on cost reduction in the mining operation.

scholarly journals FAKTOR-FAKTOR YANG MEMPENGARUHI PENINGKATAN PRODUKTIVITAS USAHA TAHU TEMPE (Studi Kasus Usaha Tahu Tempe Cahaya Putri/Restu Di Desa Pasui Kecamatan Buntu Batu Kabupaten Enrekang)

2018 ◽  
Vol 3 (2) ◽  
pp. 65
Author(s):  
Irmayani Irmayani ◽  
Nur Afni ◽  
Yusriadi Yusriadi
Keyword(s):  
Regression Analysis ◽  
Linear Regression ◽  
Work Experience ◽  
Linear Regression Analysis ◽  
Secondary Data ◽  
Multiple Linear Regression Analysis ◽  
Raw Material ◽  
Total Production ◽  
Material Price

ABSTRAK Penelitian ini dilaksanakan di  Desa Pasui Kecamatan Buntu Batu Kabupaten Enrekang dari juli sampai Agustus. Penelitian bertujuan untuk mengetahui faktor-faktor apa saja yang dapat meningkatkan usaha tahu tempe studi kasus Cahaya Putri/Restu di Desa Pasui, Kecamatan Buntu Batu, Kabupaten Enrekang. Data yang digunakan dalam penelitian ini adalah data primer dan sekunder. Metode analisis yang digunakan dalam penelitian ini adalah analisis regresi linear berganda .Metode pengambilan data yang digunakan ialah observasi, kuesioner dan wawancara. Jumlah sampel pada penelitian ini sebanyak 25 responden. Hasil penelitian kemudian di analisis menggunakan alat analisis SPSS 21 for windows. Hasil penelitian ini yang berpengaruh signifikan yaitu harga bahan baku sebesar 0,018 dan jumlah gaji karyawan dengan signifikan 0,033. Hasil Uji R Square menunjukkan bahwa variabel  yang di teliti hanya berpengaruh  39,2% terhadap jumlah produksi usaha tahu tempe sedangkan 60,8% dipengaruhi oleh variable lain yang tidak di teliti seperti tenaga kerja, bahan baku, pengalaman bekerja,kepuasan kerja karyawan dan modal. ABSTRACT This research was conducted in Pasui, Buntu Batu District, Enrekang District from July until  August 2017. The objective of this research is to know what factors at start increase the effort to tofu tempe of Cahaya Putri / Restu case study in Pasui Village, Buntu Batu Sub-District, Enrekang Regency. The data used in this research are primary and secondary data. The method of analysis used in this study is multiple linear regression analysis. Methods of data collection used are observation, questionnaire and interview. The number of samples in this study were 25 respondents. The results were then analyzed using SPSS 21 for windows. The result of this research which have significant effect that is raw material price equal to 0,018 and amount of salary of employees with significant 0,033. The result of R Square test shows that the variables in the research only influence 39,2% to the total production of tempeh tofu business, while 60,8% is influenced by other unconscionable variable such as work tenga, raw material, work experience, employee work satisfaction and capital .

Cyber crimes in the banking sector: Case study of Vietnam

2020 ◽  
Vol 6 (05) ◽  
Author(s):  
LE Thanh Tam ◽  
Nguyen Minh Chau ◽  
Pham Ngoc Mai ◽  
Ngo Ha Phuong ◽  
Vu Khanh Huyen Tran
Keyword(s):  
Financial Literacy ◽  
Commercial Banks ◽  
Banking Sector ◽  
Secondary Data ◽  
Legal Framework ◽  
Economic Sectors ◽  
Technological Revolution ◽  
Survey Results ◽  
Cyber Crimes

The technological revolution 4.0 brings great opportunities, but also cybercrimes to economic sectors, especially to banks. Using secondary data and survey results of 305 bank clients, the main findings of this paper are: (i) there are several types of cybercrimes in the banking sector; (ii) Vietnam is one of the top countries worldwide having hackers and being attacked by hackers, especially the banking sector. Three most common attacks are skimming, hacking and phishing. Number of cybercrime attacks in Vietnam are increasing rapidly over years; (iii) Vietnamese customers are very vulnerable to cybercrime in banking, as more than 58% seem to hear about cybercrimes, and how banks provide services to let them know about their transactions. However, more than 50% do not have any deep knowledge or any measures for preventing cybercrime; (iii) Customers believe in banks, but do not think that banks can deal with cybercrime issues well. They still feel traditional transactions are more secure than e-transactions; (iv) the reasons for high cybercrimes come from commercial banks (low management and human capacity), supporting environment (inadequate), legal framework (not yet strong and strict enough on cybercrimes), and clients (low level of financial literacy). Therefore, several solutions should be carried out, from all stakeholders, for improving the cybersecurity in Vietnamese banks. 

Management and engineering solutions to improve processing stock quality and reduce resource-intensity of mining

2018 ◽  
pp. 56-68
Author(s):  
V. V. Agafonov ◽  
V. Yu. Zalyadinov ◽  
M. E. Yusupov ◽  
N. S. Bikteeva
Keyword(s):  
Development Strategy ◽  
Open Pit ◽  
Mining Operations ◽  
High Concern ◽  
General Production ◽  
Resource Intensity ◽  
Product Output ◽  
And Control ◽  
A Company

Sustainability of mining companies is of of high concern. The problem is specifically acute at companies that are monotownor monosettlement-forming. Sustainability of a mine depends in many ways on product quality and production resource-intensity. This article discusses formation of mineral quality indexes in terms of an open pit chrysotile mine. The studies took into account specific features of operation procedures implemented by each structural division of the mine. The analysis has found managerial and technological inconsistencies which affect quality and marketable product output, as well as efficiency of the mine in whole. The background for efficiency enhancement at a company is, by the authors’ opinion, consolidation of personnel subject to the single development strategy, namely: improvement of production and control efficiency, as well as use of available reserves and resources by means of better setup for production. The proposed approaches to planning mining operations and forming mineral quality allow higher quality of processing stock. In addition, a new model proposed for interaction between structural divisions of a mining company ensures improvement of general production indexes.

Current state and perspectives in automation of the open pit mining operations

2019 ◽  
Vol 8 (30) ◽  
pp. 115-123
Author(s):  
A.A. Sobolev ◽  
◽  
G.V. Sekisov ◽  
A.Yu. Cheban ◽  
N.M. Litvinova ◽  
...  
Keyword(s):  
Open Pit ◽  
Open Pit Mining ◽  
Mining Operations ◽  
Current State

Penguatan Wilayah Perbatasan: Studi Kasus Pulau Sebatik Kabupaten Nunukan Provinsi Kalimantan Timur

2015 ◽  
Vol 12 (2) ◽  
pp. 110
Author(s):  
Baskoro Wicaksono
Keyword(s):  
Central Government ◽  
Secondary Data ◽  
Well Being ◽  
Research Strategy ◽  
Management Policy ◽  
Infrastructure Development ◽  
Policy Makers ◽  
The Public ◽  
East Kalimantan ◽  
Border Policy

This study describes the border management policy conducted by the central government, provinceof East Kalimantan and Nunukan. Policies such as the establishment of regulatory, institutionalstrengthening, programs and infrastructure development. The policy is getting good responsefrom the elite and the masses. On the other hand policy makers have expectations of localcommunities border synergism Sebatik Island in order to build and develop the border areas so asto break the chain of dependence on Malaysia. The research was conducted in Sebatik Island,East Kalimantan province Nunukan with the formulation of the problem (a) what policies areoriented to maintain borders, (b) How is the public response to government policy, (c) What areyour expectations of policy makers in local communities to regional border. This study usedqualitative methods to phenomenological research strategy. Techniques of data collection in thisstudy using two ways, namely in-depth interviews and secondary data view Results indicate thatthe existing policy of both the central and provincial to district borders do not solve the problembecause it is made on the island of Sebatik with other border regions. The policy does not includelocal knowledge, where it is desperately needed by the people Sebatik. In addition to policies onprograms and infrastructure development of the center, the district adopted a policy of inactionagainst the illegal cross-border trade, which on the one hand against the rules but if enforced thenpeople can not perform economic activities that impact well-being. Policies like this gets a positiveresponse from the public. Expectations for the future border policy is to load local content orlocal knowledge.Keyword: border policy, local knowledge, dependent relationship

ANALISIS KINERJA ASURANSI SYARIAH MENGGUNAKAN PENDEKATAN MASLAHAH SCORECARD (Studi Kasus Pada PT. Asuransi Takaful Umum)

2020 ◽  
Vol 1 (1) ◽  
pp. 108-125
Author(s):  
Jaharuddin Jahar ◽  
Melia Rostiana ◽  
R Melda Maesarach
Keyword(s):  
Measurement Data ◽  
Secondary Data ◽  
Process Performance ◽  
Measuring Process ◽  
Case Study Design ◽  
Quantitative And Qualitative Research ◽  
A Value ◽  
Takaful Insurance ◽  
Collection Methods

The purpose of this study was to decide the elements of performance at PT. General Takaful Insurance, to find out how to measure performance using the scorecard approach that is by measuring process performance and results performance, and interpreting in the form of conclusions. In this study, researchers tested apply maslahah at PT. General Takaful Insurance with a case study design. This research is a type of quantitative and qualitative research because it uses measurement data through formulas and if interpretative qualitative, and the data used are primary and secondary data. Data collection methods used are observation, interviews and documentation. The results showed that PT. General Takaful Insurance received a value of the performance benefit process of 0.7 which indicates that the company simply applied benefits in terms of process performance. And behave the benefit of PT. General Takaful Insurance got a value of 0.89 which shows that the company is quite good in providing benefits to stakeholders and shareholders. Keyword: Performance, Insurance, Scorecard Maslahah

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