scholarly journals An Evaluation of Practical Applicability of Multi-Assortment Production Break-Even Analysis based on Mining Companies

2017 ◽  
Vol 62 (1) ◽  
pp. 33-44
Author(s):  
Dariusz Fuksa ◽  
Beata Trzaskuś-Żak ◽  
Zdzisław Gałaś ◽  
Arkadiusz Utrata
Keyword(s):  
Financial Statements ◽  
Open Pit ◽  
Hard Coal ◽  
Fixed Costs ◽  
Open Pit Mines ◽  
Mining Companies ◽  
Profit Analysis ◽  
Methods Of Evaluation ◽  
Cost Calculations ◽  
Selection Of

Abstract In the practice of mining companies, the vast majority of them produce more than one product. The analysis of the break-even, which is referred to as CVP (Cost-Volume-Profit) analysis (Wilkinson, 2005; Czopek, 2003) in their case is significantly constricted, given the necessity to include multi-assortment structure in the analysis, which may have more than 20 types of assortments (depending on the grain size) in their offer, as in the case of open-pit mines. The article presents methods of evaluation of break-even (volume and value) for both a single-assortment production and a multi-assortment production. The complexity of problem of break-even evaluation for multi-assortment production has resulted in formation of many methods, and, simultaneously, various approaches to its analysis, especially differences in accounting fixed costs, which may be either totally accounted for among particular assortments, relating to the whole company or partially accounted for among particular assortments and partially relating to the company, as a whole. The evaluation of the chosen methods of break-even analysis, given the availability of data, was based on two examples of mining companies: an open-pit mine of rock materials and an underground hard coal mine. The selection of methods was set by the available data provided by the companies. The data for the analysis comes from internal documentation of the mines – financial statements, breakdowns and cost calculations.

scholarly journals Changes to the structure of the hydrographic network within the Silesia-Cracow area of zinc and lead exploitation

2017 ◽  
Vol 5 (2) ◽  
pp. 37-48
Author(s):  
Alicja Pradela ◽  
Andrzej Zygmuniak
Keyword(s):  
Aquatic Environment ◽  
Drainage Density ◽  
Open Pit ◽  
Hard Coal ◽  
Mining Activities ◽  
Iron Ores ◽  
Open Pit Mines ◽  
Hard Coal Mining ◽  
Quantitative Changes ◽  
Hydrographic Network

Abstract The traditions related to mining activities in the Silesia-Cracow area go back to the 11th century when lead, silver, and iron ores were exploited from open pit mines. For centuries, the growth in ore exploitation was an incentive for the development of other industries (hard coal mining, steelmaking). This, in consequence, resulted in progressive urbanization. The areas analyzed are of highly transformed character, mainly because of mining activities. These changes are especially seen in relation to the aquatic environment since this component is exposed to heavy modifications due to the mining processes. Hence the study was carried out in order to determine the quantitative changes in the surface hydrographic network. It was found, that of the 62 main watercourses (existing during the whole analyzed period) 25 changed only slightly in terms of their length, 20 shortened by a few hundred meters and 17 lengthened. In the case of the aggregated length of the tributaries, the value increased for the 41 main watercourses, for 10 of them it was constant and was reduced slightly for a further 11. The areas where the length of the watercourses increased and the drainage density grew were found to be as well those where the total area of wetlands decreased. The element of the hydrographic network which was affected by the most changes was the water bodies. During the analyzed period of over 200 years, their number increased from 154 to 1413.

scholarly journals Sales Forecasting and Coal Mining Planning in the Context of Hard Coal Production Strategies

2018 ◽  
Vol 1 (1) ◽  
pp. 483-489 ◽  
Author(s):  
Aurelia Rybak ◽  
Anna Manowska
Keyword(s):  
Mining Industry ◽  
Scenario Planning ◽  
Hard Coal ◽  
Coal Production ◽  
Factors Affecting ◽  
Mining Companies ◽  
Production Strategies ◽  
Production Strategy ◽  
Method Of Evaluation ◽  
Selection Of

Abstract Polish energy security is based mainly on a coal. Such dependency will be still maintained for several years. It is therefore necessary to improve the economic situation of polish mining companies. The mining companies in Poland are operating under tremendous uncertainty of turbulent environment. The article presents used by the authors methods to facilitate the creation and selection of optimal production strategy. These are scenario planning, forecasting and linear programming, which allow the simulation of company operations in the future. The authors suggest the most successful and optimal forecasting models for the Polish mining industry, as well as factors affecting the demand for hard coal in Poland. The manuscript presents also possible to apply coal production strategies and the method of evaluation and selection of optimal strategy in the difficult conditions of Polish mining companies environment. This makes it possible to take a decision burdened with minor errors and less risk.

Technological advances are improving mining efficiency

2017 ◽  
Keyword(s):  
Commodity Markets ◽  
Open Pit ◽  
High Grade ◽  
Open Pit Mines ◽  
Content Type ◽  
Mining Companies ◽  
Technological Advances ◽  
Brick And Mortar ◽  
Remote Sites ◽  
Fabric Structures

Subject Mining companies rediscover innovation. Significance The prolonged slump in commodity markets has forced mining companies to focus on cost control. Firms responded first by cutting sustainable capital and refocusing production on high-grade areas. Now the industry is turning to lower-quality, shorter-life deposits, requiring innovation and the embrace of radical technological breakthroughs to extract additional profit margin. Impacts Fleets of autonomous mining trucks will change the design of ramps in open-pit mines, improving economic optimisation and safety. Certain bulk commodities are becoming amenable to more environmentally friendly and nimble forms of containerised transport. Durable fabric structures for storage, maintenance and employee accommodation will replace brick-and-mortar structures at remote sites. The advent of optical ore sorting and other forms of pre-concentration will reduce unnecessary processing of waste material.

scholarly journals System approach to selection of rockfall engineering protection steelworks in open pit mines

2020 ◽  
pp. 33-38
Author(s):  
A. Yu. Barinov ◽  
◽  
V. A. Eremenko ◽  
V. K. Bushkov ◽  
◽  
...  
Keyword(s):  
System Approach ◽  
Open Pit ◽  
Open Pit Mines ◽  
Engineering Protection ◽  
Selection Of

New approach for selection of waste dump sites in open pit mines

2008 ◽  
Vol 117 (1) ◽  
pp. 24-31 ◽  
Author(s):  
A. Hekmat ◽  
M. Osanloo ◽  
Akbarpour M. Shirazi
Keyword(s):  
Open Pit ◽  
Waste Dump ◽  
Open Pit Mines ◽  
New Approach ◽  
Selection Of

scholarly journals Assessment of the shovel-truck system operation quality at open-pit mines in Kuzbass

2021 ◽  
Vol 303 ◽  
pp. 01007
Author(s):  
Anton Voronov ◽  
Alexey Khoreshok ◽  
Yuri Voronov ◽  
Artyom Voronov
Keyword(s):  
Quality Assessment ◽  
Open Pit ◽  
Expert Assessment ◽  
Open Pit Mines ◽  
Priority Areas ◽  
Analysis And Synthesis ◽  
Modeling Data ◽  
Selection Of ◽  
Functional Criterion

Assessment of the shovel-truck system (STS) operation quality is based on the well-known method of non-expert assessment of the quality of mining machines. The methodology is based on the fundamental principles of qualimetry and allows making the assessment of functionally homogeneous machines of different sizes, types and designs based on the functional criterion of the machine, which determines its main purpose. In this work, the quality assessment is made not for a single machine, but for a set of machines, taking into account their interaction. Assessment of the STS operation quality allows us to create a basis for the selection of priority areas for its improvement. The work uses methods of mathematical modeling, data collection and processing, statistics, analysis and synthesis. A comprehensive quality assessment makes it possible to predict the level and select priority areas for improving existing STSs or STSs being projected.

Management and engineering solutions to improve stripping equipment efficiency in Chernogorksy open pit mine

2018 ◽  
pp. 36-48
Author(s):  
G. N. Shapovalenko ◽  
S. N. Radionov ◽  
V. V. Gorbunov ◽  
V. A. Khazhiev ◽  
V. Yu. Zalyadnov ◽  
...  
Keyword(s):  
Open Pit Mine ◽  
Open Pit ◽  
High Concentration ◽  
Open Pit Mines ◽  
Blasting Operation ◽  
Internal Dump ◽  
Mining Conditions ◽  
Mining Front ◽  
Comparison Of Equipment

Chernogosky open pit mine integrates truck-and-shovel system of mining with overburden rehandling to internal dump with a set of walking excavators for rehandling of overburden to mined-out area of the pit. It is possible to improve efficiency of stripping in the conditions of Chernogorsky OPM by reducing percentage of stripping with more expensive handling system. The relevant research and solutions to this effect are presented in this article. Comparative characterization of mining conditions and parameters of mining systems applied is given for open pit mines Chernogorsky, Turnui, Nazarovsky, Vostochno-Beisky and Izykh. The comparative analysis points at the need to account for difficulty of mining and process sites in comparison of equipment productivity. High concentration of mining machines, which is conditioned by narrow mining front and simultaneous operation of five faces, as well as blasting operation implemented every 1-2 days, are recognized as the main constraints of excavator capacity in mining with direct dumping in Chernogorsky open pit mine. The management and engineering solutions implemented in the mine and resulted in higher efficiency of draglines are described.

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