scholarly journals Improving Quality of Granulometric Composition at Open-Pit Mines of Construction Materials to Reduce Well Diameter

2018 ◽  
Vol 194 ◽  
pp. 082024 ◽  
Author(s):  
D V Moldovan ◽  
V I Chernobai
Keyword(s):  
Granulometric Composition ◽  
Construction Materials ◽  
Open Pit ◽  
Open Pit Mines

scholarly journals Granulometric composition predicting models after explosion in open-pit mining

2020 ◽  
pp. 14-24
Author(s):  
Sergei Vokhmin ◽  
Keyword(s):  
Rock Mass ◽  
Granulometric Composition ◽  
Construction Materials ◽  
Production Costs ◽  
Open Pit ◽  
Open Pit Mining ◽  
Technological Problem ◽  
Total Production ◽  
Ferrous Metals ◽  
Fraction Yield

Introduction. Drilling and blasting operations are first in the workflow and significantly determine the economic efficiency of the entire mining and primary processing workflow in the enterprise. The cost of drilling and blasting operations is a significant part of total production costs of large mining companies. In this context, mining engineers today are facing a crucial technological problem, i.e. the reduction of the off-gauge fraction yield after the explosion. Research aims to develop the models which forecast the granulometric composition of the rock mass taken down as the original factor in reducing the economic waste of the entire workflow. Methodology. The parameters which influence the results of rock mass fragmentation and the techniques of rock mass granulometric composition forecasting in the course of drilling and blasting were analyzed. Results. The present paper gives a brief overview of the global mineral output; provides information on the extraction of key types of minerals (mineral fuel, ferrous metals, non-ferrous metals, precious metals, and construction materials), as well as revenues derived from their sale. On the example of domestic companies, approaches to the issue of forecasting the off-gauge fraction yield after the explosion. Summary. Direction for future actions in creating the model forecasting rock mass yield of a certain fraction after the explosion.

scholarly journals An approach for evaluation the safety and quality of transport at the open pit mines, based on the EDAS method

2017 ◽  
pp. 139-144
Author(s):  
Mlađan Maksimović ◽  
Miodrag Brzaković ◽  
Miloš Grahovac ◽  
Ivana Jovanović
Keyword(s):  
Open Pit ◽  
Open Pit Mines

scholarly journals Justification of the Relationship of Production Capacity and the Parameters of the Blocks at Surface Mining of Existing Kuzbass Quarry Fields

2019 ◽  
Vol 105 ◽  
pp. 01047
Author(s):  
Alexei Selyukov ◽  
Andrey Gerasimov ◽  
Kirill Byrdin
Keyword(s):  
Production Capacity ◽  
Surface Mining ◽  
Open Pit ◽  
Open Pit Mining ◽  
Open Pit Mines ◽  
Precise Analysis ◽  
Industrial Use ◽  
Relationship Of ◽  
The Relationship

Today, up to two-thirds of the world’s minerals are mined in an open, more economical way. However, at the same time, billions of tons of overburden are extracted, which are piled in the dumps, where they are polluted, lose their value and, in addition, reduce the quality of the environment. The possibility of industrial use of various rocks of from quarry field characterizes the complexity of minerals extracted by surface mining. Currently, there are no clear criteria for determining the size of blocks when designing enterprises for open pit mining. In most cases, when designing open pit mines, a quarry field is conventionally divided into several blocks, which does not always ensure the optimal production capacity of the mining enterprise due to the uneven distribution of reserves in the block contours. Because of that, during the transition from one block to another, a decrease in the production capacity of the enterprise can be noted. To avoid productivity decreasing, the precise analysis of the block parameters must be performed.

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.

scholarly journals The Influence of Voltage Quality on Asynchronous Motor Performance of EKG Excavator in Open Pit Mines – Vinacomin

2020 ◽  
Vol 1 (2) ◽  
Author(s):  
Xuan Cuong Ngo ◽  
Do NHU Y ◽  
Tran QUANG HIEU
Keyword(s):  
Asynchronous Motor ◽  
Simulation Software ◽  
Open Pit ◽  
Open Pit Mining ◽  
Electrical Network ◽  
Open Pit Mines ◽  
Voltage Quality ◽  
Electric Excavator ◽  
Nonsinusoidal Voltage

At present, in open-pit mining, the main and most important electrical load is the electric excavator, and currently using a variety of EKG excavators. 6kV electrical network in open pit mining has the characteristics such as long outgoing lines, use high-powered equipment, multiple branches, and increasing use of power electronics on the grid, this reduces the quality of the power supplied to the excavators EKG, resulting in an increase in power losses thereby greatly affecting the performance of the excavators. Previous studies on the quality of the power supplied to the excavator often only mentioned voltage deviations, in addition to this factor, the performance of the excavator is also greatly affected by nonsinusoidal voltage waveforms of the excavator power supply. This paper analyzes the influence of the nonsinusoidal of voltage on the power loss of electric motors used in EKG electric excavators in open pit mining based on the method of electromagnetic analysis and verification on simulation software.

scholarly journals PALYNOLOGICAL STUDIES OF BRONZE AGE ARCHAEOLOGICAL OBJECTS FROM THE ISHKINOVKA MINING SITE

2021 ◽  
pp. 74-90
Author(s):  
А. С. Алешинская ◽  
М. Д. Кочанова ◽  
Е. А. Спиридонова ◽  
В. В. Ткачев
Keyword(s):  
Bronze Age ◽  
Construction Materials ◽  
Component Composition ◽  
Open Pit ◽  
Buried Soils ◽  
Open Pit Mines ◽  
Mining Site ◽  
Palynological Assemblages ◽  
Palynological Spectrum ◽  
Changes Over Time

В статье приводятся результаты палинологических исследований археологических объектов бронзового века в районе Ишкининского медного рудника: разреза на поселении Ишкиновка и погребенных почв, сохранившихся под отвалами карьеров. Палинологические исследования образцов с поселения Ишкиновка позволили получить информацию о характере формирования культурного слоя поселения, образование которого связано с руинированием саманных построек с органическими перекрытиями. Особенности строительных материалов предопределили сложный многокомпонентный состав палинологических комплексов. Результаты палинологических исследований на Ишкининском руднике и поселении Ишкиновка хорошо согласуются с реконструируемой моделью их функционирования, в соответствии с которой выделяется не менее трех этапов разработки Ишкининского месторождения на протяжении ПБВ. Каждому из выделенных хронологических этапов соответствует самобытный палинологический спектр, отражающий динамику природно-климатической ситуации в районе исследований. Эти данные надежно верифицируются результатами радиоуглеродного датирования погребенных почв, законсервированных под отвалами карьеров. The paper describes the results of palynological studies of Bronze Age archaeological assemblages discovered within the Ishkinovka copper mining center, i. e. the section at the Ishkinovka settlement, and the buried soils preserved under the dumps from the open-pit mines. Palynological studies of the samples from Ishkinovka helped obtain information on how the occupation layer at the settlement was formed. Its formation is linked to ruination of mudbrick constructions with organic roofing. Distinctive features of the construction materials predetermined a complex multi-component composition of palynological assemblages. The results of the palynological studies at the Ishkinovka mining site and the Ishkinovka settlement correlate well with the reconstructed model of their operation. At least three stages of the Ishkinovka deposit development during the Late Bronze Age have been singled out. Each identified chronological stage corresponds to a distinctive palynological spectrum reflecting changes over time in the natural and climatic situation in the studied region. These data are reliably verified by the radiocarbon dating of the buried soils preserved under the dumps of the open-pit mines.

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.

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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