scholarly journals Technological and Economic Analysis of the Application of Surface Miner on the Example of a Limestone Deposit in Poland

2021 ◽  
Vol 1 (2) ◽  
Author(s):  
Maciej ZAJĄCZKOWSKI
Keyword(s):  
Economic Analysis ◽  
Energy Requirement ◽  
Environmental Hazards ◽  
Blasting Operation ◽  
Advantages And Disadvantages ◽  
Surface Miner ◽  
Mining Conditions ◽  
Basic Parameters ◽  
Output Quantity

Mining a deposit utilizing surface miner is very popular in many countries. Presently, a surfaceminer has also experimented with extracting different deposits: bauxite, hematite, sandstone, shale etc.Surface miners can completely eliminate drilling and blasting operation and primary crushing unit, thusreducing their associated environmental hazards. Apart from this, the sized excavated material increasestransport or conveying efficiency and saves the energy requirement in processing. So far, these machineshave not been used in Poland. To evaluate this technology, tests were carried out on one of the limestonedeposit in Poland. During these tests, basic parameters of efficiency, output quantity and mining costswere defined. The conducted tests have shown that this technology cannot be used in all geological andmining conditions. Therefore, the article presents the advantages and disadvantages of using surfaceminer, taking into account the Polish geological and mining conditions.

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.

scholarly journals Toward Reverse Engineering to Economic Analysis: An Overview of Tools and Methodology

2021 ◽  
Author(s):  
Marisa Faggini ◽  
Bruna Bruno ◽  
Anna Parziale
Keyword(s):  
Complex System ◽  
Nonlinear Dynamics ◽  
Economic Analysis ◽  
Complex Systems ◽  
Reverse Engineering ◽  
Underlying Mechanism ◽  
Economic Data ◽  
Agent Based ◽  
Economic Agents ◽  
Advantages And Disadvantages

AbstractFollowing the reverse engineering (RE) approach to analyse an economic complex system is to infer how its underlying mechanism works. The main factors that condition the difficulty of RE are the number of variable components in the system and, most importantly, the interdependence of components on one another and nonlinear dynamics. All those aspects characterize the economic complex systems within which economic agents make their choices. Economic complex systems are adopted in RE science, and they could be used to understand, predict and model the dynamics of the complex systems that enable to define and to control the economic environment. With the RE approach, economic data could be used to peek into the internal workings of the economic complex system, providing information about its underling nonlinear dynamics. The idea of this paper arises from the aim to deepen the comprehension of this approach and to highlight the potential implementation of tools and methodologies based on it to treat economic complex systems. An overview of the literature about the RE is presented, by focusing on the definition and on the state of the art of the research, and then we consider two potential tools that could translate the methodological issues of RE by evidencing advantages and disadvantages for economic analysis: the recurrence analysis and the agent-based model (ABM).

Modes of Ventilation

2019 ◽  
Author(s):  
Michael J Harrison
Keyword(s):  
Respiratory Rate ◽  
Pulmonary Ventilation ◽  
Lung Ventilation ◽  
Intrathoracic Pressure ◽  
Jet Ventilation ◽  
Hemodynamic Stability ◽  
Advantages And Disadvantages ◽  
Basic Parameters ◽  
Anesthesia Machines ◽  
The Common

Lung ventilation is required to maintain oxygenation and eliminate carbon dioxide. The basic parameters of ventilation—tidal volume, respiratory rate, airway resistance, and lung and thoracic compliance—all combine to affect the airway pressure. These parameters, in turn, can affect cardiac output and hemodynamic stability through their effect on intrathoracic pressure and on venous return to the heart. Since the 1950s, many machines have been designed to allow the physician to optimize ventilation. These designs have revolved around three physical variables: volume, pressure, and time. Volume is required to overcome the anatomic respiratory dead space and allows gas exchange in the alveoli. Pressure is required to inflate the elastic system comprising the lungs and thorax, but must also be limited to prevent tissue damage. Time not only determines the respiratory rate but also the rate of flow of gas in and out of the lungs. Many permutations of these basic parameters in anesthesia machines are available today. Knowledge of the common forms of ventilation and their advantages and disadvantages will guide the anesthesiologist in choosing from among these various complex systems. This review contains 5 figures, 3 tables, and 27 references. Key words: CPAP, HFOV, IMV, IPPV, jet ventilation, PEEP, pressure cycled, pulmonary ventilation, SIMV, spontaneous, volume cycled

Technical and Economic Analysis of Cogeneration Systems for Refinery Power Plant Applications

2010 ◽  
Author(s):  
J. Hugo Rodri´guez Marti´nez ◽  
Agusti´n Alcaraz Caldero´n ◽  
Luis Iva´n Ruiz Flores ◽  
Roberto Valdez Vargas
Keyword(s):  
Economic Analysis ◽  
Heat Recovery ◽  
Net Present Value ◽  
Energy Requirement ◽  
Cooling Water ◽  
Internal Rate Of Return ◽  
Additional Energy ◽  
Technical Parameters ◽  
Technical And Economic Analysis ◽  
Standard Techniques

This paper shows the main results from a technical and economical study for the implementation of new cogeneration systems in Mexican refineries. At least three cogeneration alternatives to match a 50% additional energy requirement (thermal and electric) for a refinery are analyzed. A balance simulator tool developed specially for the electric and steam refinery systems is used in order to obtain the technical parameters for the alternatives, which allows obtaining system performance indicators such as fuel consumption, cooling water requirement, electric and combined efficiency. Standard techniques as net present value, internal rate of return, and payback period are used for the economic analysis. According to the results, the best alternative was a gas turbine-heat recovery steam generator arrangement fueled by natural gas, including the respective adjustments of the refinery electrical and steam systems.

scholarly journals Determination of the Energy Capacity of Face Rock Breaking by the Geokhod’s Knife Operating Element and its Dependence on the External Propeller’s Pitch

2019 ◽  
Vol 105 ◽  
pp. 03024 ◽  
Author(s):  
Valery Nesterov ◽  
Vladimir Aksenov ◽  
Vladimir Sadovets ◽  
Dmitry Pashkov ◽  
Zhadyra Beysebayeva
Keyword(s):  
Rock Breaking ◽  
Geometrical Parameters ◽  
Energy Capacity ◽  
New Class ◽  
Advantages And Disadvantages ◽  
Operating Element ◽  
Mining Conditions ◽  
Breaking Energy ◽  
Goals And Objectives

The article contains a method for determination of the energy capacity of face rock breaking by the knife operating element of the geokhod. In addition, the dependence of the breaking energy capacity on the pitch of the geokhod’s external propeller was revealed. The relevance of the study was considered. In order to set goals and objectives of the study, work features of new-class mining machines – geokhods and fundamental principles of geokhod technology were presented. Advantages and disadvantages of existing methods for determination of the energy capacity of rock breaking were identified, and the possibility of using them in calculation of power parameters of the geokhod’s knife operating element was assessed. Power and geometrical parameters of the geokhod’s knife operating element were determined, which affect the energy capacity of rock breaking. To determine the influence of the external propeller’s pitch on the breaking energy capacity, geometrical parameters of the knife operating element and parameters of mining conditions of workings were substantiated. As a result of the study, it was revealed that the energy capacity of rock breaking by the knife operating element decreases non-uniformly as the pitch of the external propeller increases.

ECONOMIC ANALYSIS OF QUARRY SURVEYING

2020 ◽  
Author(s):  
Vivita Pukite ◽  
Vita Celmina ◽  
Dainora Jankauskiene
Keyword(s):  
Remote Sensing ◽  
Economic Analysis ◽  
Land Surface ◽  
Laser Scanning ◽  
Market Price ◽  
Mineral Resources ◽  
Volume Calculation ◽  
Advantages And Disadvantages ◽  
Remote Sensing Methods ◽  
Geodetic Surveying

There are several surveying methods whose practical function is to determine the areas of land, distances, heights, the amount of earthwork, and to produce reduced images of the earth's surface. The research looks at how geodetic and remote sensing methods can be used, and the results they provide in quarry surveying. The most important in quarry surveying is to get an accurate land surface for calculation of the volume of mineral resources. After quarries surveying, it is possible to calculate the amount of remaining mineral resources. Within the framework of the research, were performed surveying in quarries with geodetic surveying and remote sensing methods. For geodetic surveying was used GNSS receiver and a robotic total station, but from remote sensing methods were used aerial photography and aerial laser scanning. The most important reason why it is important to get an accurate surface and make an accurate volume calculation in quarry surveying is the economic factor. The economic analysis was carried out using a comparison method based on volume, market price and natural resources tax. The research presents the advantages and disadvantages of each surveying method and explains the results obtained, based on economic calculations. The main conclusion is that the accuracy of the preparation of land surface relief models is based mainly on economic calculations because mineral resources are a commodity that is bought and sold for which tax is payable.

New Сlassification of Ore Deposits Mining Methods

2017 ◽  
Vol 25 ◽  
pp. 71-79 ◽  
Author(s):  
Maksym Kononenko ◽  
Oleh Khomenko ◽  
Denys Astafiev
Keyword(s):  
Ore Deposits ◽  
Mining Method ◽  
New Classification ◽  
Advantages And Disadvantages ◽  
Mining Conditions ◽  
Mining Methods ◽  
The Way

The analysis of advantages and disadvantages of the existing classifications of mining method by the way of stoping space supporting in the course of extraction of ores is executed. The new classification of mining methods of ore deposits allowing to capture all range of the applied variants of systems for different mining-and-geological and mining conditions is developed. It is possible to formulate names of mining methods on proposed which allows to present a complex of the productions which are carried out during mining of production blocks.

scholarly journals Economic Analysis Relationship in Determining The Size of Parliamentary Threshold in Indonesia

2020 ◽  
Vol 1 (2) ◽  
pp. 152
Author(s):  
Sholahuddin Al-Fatih
Keyword(s):  
Economic Analysis ◽  
Legal Norm ◽  
Economic Factors ◽  
Legislative Elections ◽  
Legal Policy ◽  
Threshold Size ◽  
Advantages And Disadvantages ◽  
The Law ◽  
Relationship Of ◽  
The Relationship

This research tries to discuss the relationship of economic factors in the establishment of a legal norm. Through conceptual and statutory approaches, this study tries to examine the concept of the relationship between economics and the law initiated by Richard A. Posner. This research makes the establishment of the norm on the size of the parliamentary threshold in the implementation of legislative elections as a benchmark for the relationship between the economy and the law. The results of this study show that changes in the size of the parliamentary threshold can be understood as an open legal policy agreed upon by lawmakers. The existence of rules on open legal policy makes economic and legal relations in determining the norms of parliamentary threshold size become real. This research is expected to help academics and legal practitioners to dig deeper into the relationship between economics and law, so as to understand the advantages and disadvantages that may result from such relationships.

scholarly journals ENERGY REQUIREMENT AND ECONOMIC ANALYSIS OF SUBSURFACE DRIP IRRIGATION IN SIWA OASIS

2010 ◽  
Vol 27 (4) ◽  
pp. 1771-1793
Author(s):  
M. N. Awady ◽  
M. A. Wassif ◽  
M. F. Abd el-Salam ◽  
M. A. El-Farrah
Keyword(s):  
Economic Analysis ◽  
Drip Irrigation ◽  
Energy Requirement ◽  
Subsurface Drip Irrigation ◽  
Subsurface Drip
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