scholarly journals Function of Production, Capital, Labor and Government Policy in The Coal Mining Sector - Case Study of an Indonesian Coal Mining Company

2021 ◽  
pp. 186-199
Author(s):  
Suryadi ◽  
Yeni Nuraeni ◽  
Ivan Lilin Suryono ◽  
Yuniarti Tri Suwadji ◽  
Hennigusnia ◽  
...  
Keyword(s):  
Coal Mining ◽  
Government Policies ◽  
Coal Production ◽  
Model Function ◽  
Mining Company ◽  
Business Results ◽  
Policy Variable ◽  
Additional Input ◽  
Indonesian Coal

This study aims to determine the effect of labor, capital, and government policies on coal output and the scale of coal business results of PT Indo Tambangraya Megah Tbk. The new thing from this research is the Cobb-Douglas production function which usually uses labor and capital variables, but in this study, it has been expanded by adding policy variable in the form of Law No. 4 of 2009 regarding Mineral and Coal Mining, which is not yet present in other studies. The research method is linear regression using the Cobb-Douglas model function. The results showed that labor did not significantly influence coal production. Capital has a significant effect on model 2 and policy has a significant effect on model 3. The coal mining business of PT Indo Tambangraya Megah Tbk is in decreasing return to scale because if the three variables are combined, it will be worth -0.24. This condition occurs because the additional output produced is smaller than the additional input (δ% output <δ% input).

scholarly journals Soil Erodibility Characteristics of Reclamation Area—A Case Study in Indonesian Coal Mining

2014 ◽  
Vol 8 (7) ◽  
Author(s):  
Hideki Shimada ◽  
Sri Maryati ◽  
Akihiro Hamanaka ◽  
Takashi Sasaoka ◽  
Kikuo Matsui
Keyword(s):  
Coal Mining ◽  
Soil Erodibility ◽  
Reclamation Area ◽  
Indonesian Coal

scholarly journals Reproduction of the longwall panels: modern requirements for the technology and organization of the development operations at coal mines

2020 ◽  
pp. 19-23
Author(s):  
O. I. Kazanin ◽  
◽  
A. A. Sidorenko ◽  
S. A. Sidorenko ◽  
A. A. Meshkov ◽  
...  
Keyword(s):  
Coal Mining ◽  
Cost Reduction ◽  
High Performance ◽  
Coal Mines ◽  
High Rate ◽  
Coal Production ◽  
Action Time ◽  
Efficiency Increase ◽  
The Common

The authors point at the criticality of timely reproduction of longwall panels in coal mines toward sustainable and high-rate coal mining based on the utilization potential of modern longwall equipment. A case-study of SUEK-Kuzbass mines shows that there is a need to change approaches to improvement of economic efficiency and competitiveness of coal mining and to shift from the common practice of production cost reduction to productivity enhancement through implementation of high-performance equipment capabilities. Efficiency of road heading in mines of SUEK-Kuzbass is analyzed, and the main causes of long downtime in operation of modern high-performance continuous miners (CM) or continuous bolter miners (CBM) are identified. Recommendations have been developed for improved planning of preparatory works in mines and for introduction of significant action time margin to eliminate downtime when actual drivage performance lags behind the planning data. The action time structure of modern CBM is presented, and recommendations are given on CBM efficiency evaluation as actual action time in cutting road face rocks. The application areas of various modern CBM types are justified. Recommendations are proposed for changing the parameters of longwall panels and to change to multi-entry longwall panels in order to increase efficiency of preparatory works and actual coal production. The authors describe expediency of widespread use of shuttle cars to improve efficiency of haulage of rocks and materials. The organizational and technological principles of the efficiency increase in preparatory works in coal mines are substantiated.

scholarly journals The application of linear programming to a coal-mining problem: A case study

1985 ◽  
Vol 16 (1) ◽  
pp. 46-48
Author(s):  
W. G. Klerck ◽  
G. M.S. Turner
Keyword(s):  
Linear Programming ◽  
Coal Mining ◽  
Programming Model ◽  
International Standards ◽  
Power Station ◽  
Mining Company ◽  
Coal Reserves ◽  
Trade Market

This article describes the application of linear programming to a problem faced by a small coal-mining company. The company owns two operating collieries, one supplies the general inland trade market while the other supplies a power station under a 30-year-tied contract. The company was awarded an export allocation for a 30-year period and as a result was trying to establish how to supply the coal for the various markets. Only the colliery that supplied the power station had sufficient reserves to base an export contract on. It was underlain by two economically recoverable seams of coal. The quality of the coal reserves is, however, low compared to international standards and is therefore unacceptable in its raw state. It is, however, possible to upgrade the coal by washing it. The grade of the final product (float) can be adjusted by altering the density of washing. However the yield, as a percentage of the raw coal feed, falls off rapidly as the grade is increased. Furthermore the sinks can likewise be upgraded by washing. The company wondered how they should optimize the flowsheet. How much coal should they mine from each of the two seams, how much from each source should go to the power station, how much should they produce for export, how should the upgrading be done, and to what extent. A linear programming model was formulated to solve the problem facing the company.

scholarly journals Strategic Assumptions for The Success of Coal Mining Reclamation to be A Tourism Site; A Case Study in Rantau Pandan Village of Bungo Regency

2020 ◽  
Vol 18 (2) ◽  
pp. 253-260
Author(s):  
Asnelly Ridha Daulay
Keyword(s):  
Coal Mining ◽  
Group Discussion ◽  
Primary Data ◽  
Large Area ◽  
Mining Company ◽  
The People ◽  
Local Institution ◽  
The Social ◽  
The Government

Bad practice of open coal mining in Bungo Regency leaves many abandoned ponds. One pond in Rantau Pandan Village has been neglected for 5 years. Its environmental and social impacts pushed people to sue the government to revoke the permit of XXX Company that manages the mining. The low price of coal as well as the deep and large area to be piled make more difficult to do reclamation. This study aims at exploring the prospect of doing reclamation for tourism purposes with the concept of Community Based Tourism (CBT) and analyzing some strategic assumptions for the success that of reclamation. Primary data were collected through observation, interview and focus group discussion. Data were analyzed descriptively and qualitatively using Strategic Assumption Surfacing and Testing (SAST) method. Research finding shows that the people are eager to welcome the idea of CBT however the compensation from the mining company should be paid first. Of 22 assumptions for the development of tourism village, 18 assumptions can be grouped into quadrant II or Certain Planning Region, while 4 assumptions are in quadrant IV or Problematic Planning Region. To support this plan, it’s suggested five things i.e. resolving the social conflict among parties, strengthening the local institution, giving a mandate to villagers to manage the pond as a tourism site, then followed by supervising and enhance infrastructure to ease access.

Chances and Threats of Hard Coal Mining Development in Poland – The Results of Experts Research/Szanse I Zagrożenia Dla Rozwoju Górnictwa Węgla Kamiennego W Polsce – Wyniki Badań Eksperckich

2014 ◽  
Vol 59 (2) ◽  
pp. 395-411 ◽  
Author(s):  
Józef Dubiński ◽  
Marian Turek
Keyword(s):  
Coal Mining ◽  
Present Situation ◽  
Hard Coal ◽  
Coal Production ◽  
Actual Situation ◽  
Mining Sector ◽  
Energy Carriers ◽  
Hard Coal Mining ◽  
Adverse Influence ◽  
Other World

Abstract The actual situation of hard coal mining in Poland has been presented. In particular, these factors, which have impact on the competiveness of mining sector were highlighted and need of its improving has been stressed. Outlining present situation of hard coal mining an attention was paid to its specific threats. The primary analytical material is based on the results of questionnaire conducted among 92 specialists and experts from the mining sector. The questions were related to chances and threats for development of hard coal mining in Poland. The factors determining them were grouped in such domains as economy, technology, geology, social and law aspects. Moreover, the special attention was paid to the problem of increasing and high costs of coal production which constitute significant threat for the financial and economic situation of the mining enterprises. Also the adverse influence of these high cost on the competitiveness of Polish hard coal with other world producers and with other energy carriers was emphasized. The conclusions summarize the achieved results of analysis.

ENVIRONMENTAL IMPACT OF COAL MINING

2020 ◽  
Author(s):  
Наталья Алексеевна Бойко ◽  
Наталья Владимировна Ромашева
Keyword(s):  
Environmental Impact ◽  
Organizational Structure ◽  
Coal Mining ◽  
Negative Impact ◽  
Coal Industry ◽  
Coal Production ◽  
Atmospheric Air

Представлена характеристика угольной отрасли России по таким направлениям как организационная структура, объем и регионы добычи, потребители угля. Выявлены положительные тенденции, определены проблемы в развитии угольной промышленности. Исследованы негативное воздействие угольного производство на такие компоненты окружающей среды, как атмосферный воздух, водные ресурсы, земная поверхность. The characteristic of the Russian coal industry in such areas as the organizational structure, volume and regions of production, coal consumers has been presented. Positive trends and problems in the development of the coal industry have been identified. The negative impact of coal production on environmental components such as atmospheric air, water, the earth’s surface has been investigated.

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