scholarly journals Development of a New Environmentally-Friendly Technology for Transportation of Mined Rock in the Opencast Mining

2020 ◽  
Vol 24 (1) ◽  
pp. 341-356 ◽  
Author(s):  
Sergey Kuzmin ◽  
Olga Kadnikova ◽  
Gulnara Altynbayeva ◽  
Andrey Turbit ◽  
Zauresh Khabdullina
Keyword(s):  
New Technology ◽  
Small Mass ◽  
Open Pit Mine ◽  
Open Pit ◽  
Opencast Mining ◽  
Mining Operations ◽  
Shortest Distance ◽  
Vehicle Fleet ◽  
The Cost ◽  
Cost Of Transportation

AbstractThis article proposes a new technology of container carriage of rocks without construction of transport communications in an open-pit mine and with technological and energy-saving advantages. These advantages are: simultaneous excavation of rocks, transportation of rocks by the shortest distance, small mass of a container and mobility of a complex of hoists which will reduce energy expenses and the cost of transportation of the mined rock. One of the principal advantages of the developed technology is the decrease in environmental emissions into the atmosphere of the open-pit mine thanks to the reduction of the vehicle fleet. This technology will enable significant improvement of the environmental situation in the area of mining operations.

scholarly journals Combined Method of Coal Mining in the Opening of Shallow Layers as a Direction of Innovative Development of Geotechnology

2021 ◽  
Vol 315 ◽  
pp. 01006
Author(s):  
Tatiana Tyuleneva ◽  
Roman Shishkov ◽  
Elena Kucherova ◽  
Marat Moldazhanov
Keyword(s):  
Coal Mining ◽  
Underground Mining ◽  
Methodological Approach ◽  
Production Capacity ◽  
Open Pit ◽  
Open Pit Mining ◽  
Mining Operations ◽  
Balanced Development ◽  
Coal Reserves ◽  
The Cost

In recent years, there has been a decline in the efficiency of coal mining by traditional methods. On the one hand, the volume of coal outside the contour of the cut, which is economically impractical for open-pit mining, is increasing. On the other hand, when using underground geotechnology, the cost of production exceeds the cost of performing mining operations using open geotechnology, this is due to differences in the factors of operation of the open pit and the mine. This circumstance determines the use of open-underground technology for mining coal reserves outside the contour of the open pit as an actual and promising direction. This article describes a methodological approach based on the use of technological schemes for the preparation and treatment of reserves of powerful shallow coal seams, the justification of the parameters of combined geotechnology with a coordinated and balanced development of open and open-underground mining operations with the distribution of reserves for open and open-underground mining of coal reserves beyond the limit contour of the open pit, the preparation of excavation sites directly from its workings and the coordination of production capacity and the speed of their development. Its application will increase the production capacity of the coal mining complex without additional environmental burden and will provide an increased return on investment.

Landslide stabilization experience in Urtui open pit mine

2021 ◽  
pp. 102-106
Author(s):  
O. A. Isyanov ◽  
◽  
D. I. Ilderov ◽  
V. I. Suprun ◽  
S. A. Radchenko ◽  
...  
Keyword(s):  
Rock Mass ◽  
Large Scale ◽  
Geological Structure ◽  
Stability Control ◽  
Open Pit Mine ◽  
Open Pit ◽  
Open Pit Mining ◽  
Coal Seams ◽  
Mining Operations ◽  
Early Access

Instability of pit wall slopes is the most critical accident in open pit mining. The risk of damages to pit walls is proportional to the height of exposed surfaces and to the time of exposure. Among many factors governing pit wall stability, the major factor is geological structure and weakening zones in rock mass. Deformation processes are initiated in host rock mass of coal seams mostly because of undercutting of weak interlayers. Alongside with local undercutting, another cause of landslides is transition of coal mining from down-dip extraction to up-dip extraction. The sequence of mining and morphology of weak interlayers also have influence on initiation and evolution of deformations. The basic component of engineering solutions on pit wall stability control is optimization of mining sequence and methods of accessing working horizons in open pit mines. Large-scale deformation of Western and Southeastern pit walls in Urtui mine could be avoided using the optimized sequence of mining operations. For example, mining advance mostly along the curve of the Urtui centroclinal fold, with early access and destress of the eastern and, first of all, western wings of the fold could make it possible to evade from up-dip mining of coal seams and, as a consequence, to solve the major geomechanical problems in the open pit mine.

scholarly journals Methodological approach to creation of the 3D model of an oval-shaped open pit mine

2019 ◽  
Vol 123 ◽  
pp. 01049 ◽  
Author(s):  
Serik Moldabayev ◽  
Bolatbek Rysbaiuly ◽  
Zhanat Sultanbekova ◽  
Nurzhigit Sarybayev
Keyword(s):  
3D Model ◽  
Methodological Approach ◽  
Mineral Resources ◽  
Quality Criterion ◽  
Open Pit Mine ◽  
Open Pit ◽  
Open Pit Mining ◽  
Mining Operations ◽  
Optimization Task ◽  
Phased Development

A 3D model of optimal contours phased development of oval-shaped open pit mines is proposed in the article. It is assumed that with enough accuracy the volumetric contour of the open pit mine is interpolated by an elongated elliptic hyperboloid. The calculation formulas for mineral resources are derived and optimal volumes of overburden are determined depending on the mining phase. In this case, the total number of mining phases is set in advance. The stripping ratio is used as a quality criterion of the optimization task. The problem of optimal control is solved using the Bellman function in dynamic programming. All the necessary calculation formulas are obtained in the final form by solving the optimization problem. Their simplicity and substantiation of each conclusion ensure that the results of this study can be successfully applied in practical calculations of the design and planning of mining operations in open pit mining.

scholarly journals Tsunami generation by potential, partially submerged rockslides in an abandoned open-pit mine: the case of Black Lake, Quebec, Canada

2018 ◽  
Vol 55 (12) ◽  
pp. 1769-1780
Author(s):  
Jonathan Leblanc ◽  
Dominique Turmel ◽  
Jacques Locat ◽  
Carl B. Harbitz ◽  
Finn Løvholt ◽  
...  
Keyword(s):  
Water Level ◽  
Wave Height ◽  
Water Depth ◽  
Factor Of Safety ◽  
Open Pit Mine ◽  
Open Pit ◽  
Tsunami Generation ◽  
Mining Operations ◽  
Maximum Wave Height ◽  
Pumping System

The Black Lake rockslide is located on the east wall of an open-pit mine initially operated by LAB Chrysotile near Thetford Mines, Quebec. Movements were observed in July 2012 when a volume of 2.0 × 107 m3 was mobilized, destroying a large portion of Highway 112. Mining operations ceased in 2012, causing the complete shutdown of the pumping system whose goal was to prevent the rise of water level in the pit. As the water level increases in the pit, it is essential to determine the potential of tsunami generation by possible partially submerged rockslides and to understand the potential impacts. A series of possible scenarios have been analysed with regard to velocity and acceleration of the potential rockslide as well as the corresponding wave generation and inundation. Results from the simulation show that when the factor of safety of the global slope is less than unity, inundation would not reach the potentially vulnerable infrastructures. Maximum wave height will vary as a function of the filling of the lake, and the lower wave height relative to water depth will happen when the lake is completely filled.

scholarly journals Justification of the line of action for reclamation of lands disturbed by opencast mining

2021 ◽  
Vol 266 ◽  
pp. 08005
Author(s):  
Y.D. Smirnov ◽  
D.V. Suchkov ◽  
T.V. Goryunova
Keyword(s):  
Study Data ◽  
Open Pit ◽  
Open Pit Mining ◽  
Leningrad Region ◽  
Opencast Mining ◽  
Mining Operations ◽  
Land Plot ◽  
Economic Justification ◽  
Reclamation Project ◽  
Environmental Surveys

The article is devoted to the substantiation of the line of action for reclamationof disturbed lands. The object of reclamation is a land plot (Russia, Leningrad Region), disturbed as a result of unauthorized open-pit mining operations for the extraction of limestone. In order to obtain the information necessary to justify the reclamation project, the following works were carried out: reconnaissance and route observations, topographic, geological, and environmental surveys of the land. Based on the results of the generalized study data of the environmental and economic justification, a line of action for agricultural reclamation was chosen. In addition, an assessment of the estimated cost of the event was carried out and a list of necessary works was proposed within the framework of the technical and biological stages of reclamation.

SELECTING THE MODE OF MINING OPERATIONS AT THE OPEN-PIT MINE

Ugol ◽  
2015 ◽  
pp. 77-78
Author(s):  
A.V. Sokolovsky ◽  
◽  
O.I. Cherskikh ◽  
A.I. Kainov ◽  
V.A. Pikalov ◽  
...  
Keyword(s):  
Open Pit Mine ◽  
Open Pit ◽  
Mining Operations

scholarly journals Development of a predictive model of rock fragmentation for Nui Phao open-pit mine in Vietnam using multiple-output Neural Networks and Monte Carlo Dropout technique

2021 ◽  
Author(s):  
Trong Vu ◽  
Tran Bao
Keyword(s):  
Neural Network ◽  
Monte Carlo ◽  
Predictive Model ◽  
Network Models ◽  
Open Pit Mine ◽  
Open Pit ◽  
Neural Network Models ◽  
Mining Operations ◽  
Single Output ◽  
Blast Fragmentation

Abstract Precise and reliable prediction of blast fragmentation is essential for the success of mining operations. Over the years, various machine learning models using artificial neural network have developed and proven to be efficient in predicting the blast fragmentation. In this research, we design multiple-output neural networks to forecast the cumulative distribution function (CDF) of blast fragmentation to improve this prediction. The model architecture contains multiple response variables in the output layer that correspond to the CDF curve’s percentiles. We apply Monte Carlo dropout procedure to estimate the uncertainty of the predictions. Data collected from a Nui Phao open-pit mine in Vietnam are used to train and validate the performance of the model. Results suggest that multiple-output neural network models provide better accuracy than single-output neural network models that predict each percentile on a CDF independently. Whereas, Monte Carlo dropout technique can give valuable and relative reliable information during decision making. Article highlights: • Precise and reliable prediction of blast fragmentation is essential for the success of mining operations. • A predictive model based on the multi-output neural network and Monte Carlo dropout technique was designed to predict the fragmentation CDF curve in the blasting operation of an open-pit mine. • The predictive model was proven reliable and provided better accuracy than models based on a single-output neural network.

scholarly journals Optimization of Working Bench Length of Inclined Composite Coal Seam Open-Pit Mine

CONVERTER ◽  
2021 ◽  
pp. 571-581
Author(s):  
Haoran Li, Et al.
Keyword(s):  
Coal Seam ◽  
Transportation Cost ◽  
Optimization Method ◽  
Mining Area ◽  
Line Length ◽  
Open Pit Mine ◽  
Open Pit ◽  
Transport Costs ◽  
Working Face ◽  
The Cost

In order to optimize the Working bench length of inclined composite coal seam open pit mine, Through theoretical analysis and calculation, the relationship between different mining technology working bench and working face transport costs was studied, The influence of the length of the working bench on the stripping ratio of production and the mining with discharging cost of the unit coal in the mining area were studied. Taking the minimum sum of the transportation cost of working face and the cost of mining and discharging of the unit coal as the goal, a mathematical model is established, which takes the working bench as independent variable,the corresponding function curve was obtained, Considering the macroscopic planning of open-pit mine, obtain an optimization method for the length of economical and reasonable working bench of inclined composite coal seam open pit mine on the basis of technical feasibility. A case study of Heishan opencast coal mine,the Results show that when the length of working bench of the 13-2 coal seam is 0.9km, the minimum annual cost of mining and discharging and the transportation cost of the open pit mine were the smallest, and the minimum value is 269 million yuan, Considering the actual pit-limit of Heishan open pit mine, it is concluded that the comprehensive optimum line length of 13-2 coal seam in Heishan open-pit mine is 1.0km.

scholarly journals Justification of the line of action for reclamation of lands disturbed by opencast mining

2021 ◽  
Vol 266 ◽  
pp. 08009
Author(s):  
Y.D. Smirnov ◽  
D.V. Suchkov ◽  
T.V. Goryunova
Keyword(s):  
Study Data ◽  
Open Pit ◽  
Open Pit Mining ◽  
Leningrad Region ◽  
Opencast Mining ◽  
Mining Operations ◽  
Land Plot ◽  
Economic Justification ◽  
Reclamation Project ◽  
Environmental Surveys

The article is devoted to the substantiation of the line of action for reclamationof disturbed lands. The object of reclamation is a land plot (Russia, Leningrad Region), disturbed as a result of unauthorized open-pit mining operations for the extraction of limestone. In order to obtain the information necessary to justify the reclamation project, the following works were carried out: reconnaissance and route observations, topographic, geological, and environmental surveys of the land. Based on the results of the generalized study data of the environmental and economic justification, a line of action for agricultural reclamation was chosen. In addition, an assessment of the estimated cost of the event was carried out and a list of necessary works was proposed within the framework of the technical and biological stages of reclamation.

scholarly journals DEVELOPMENT OF METHODOLOGY FOR TRANSPORTATION FLEET STRUCTURE FORMATION

2021 ◽  
Author(s):  
Iryna Lebid ◽  
Tetyana Anufriyeva ◽  
Luzhanska Nataliia
Keyword(s):  
Structure Formation ◽  
Carrying Capacity ◽  
Size Range ◽  
Average Weight ◽  
Lower Intensity ◽  
Standard Size ◽  
Compliance Coefficient ◽  
Vehicle Fleet ◽  
The Cost ◽  
Cost Of Transportation

The paper proposes a methodology for transportation fleet structure formation based on the determination of the standard size fleet by carrying capacity using the criterion of the cost of transportation of 1 ton of cargo, which will be expedient if the number of shipments per day exceeds three times the estimated number of the model range of cars. At a lower intensity of daily shipments, it is necessary to form a standard size range of a vehicle fleet on the basis of a repetition of independent tests. The paper proposes a method of forming the structure of the fleet of vehicles based on determining the size of the fleet using the criterion of the cost of transportation of 1 ton of cargo, which is appropriate if the number of shipments per day exceeds three times the estimated number of cars. With a lower intensity of daily shipments, it is necessary to form a standard size range of the fleet on the basis of repeating independent tests.It has been established that the value of the coefficient of static use of the vehicle's carrying capacity is influenced by the number of intervals for dividing the series of carrying capacity, their length and uniformity, as well as the distribution law of the random value of the item. Violation of the uniformity of the intervals of the series of the carrying capacity of the car, the value of the coefficient can deviate from the average to 6.2% An increase in the number of intervals in a number of carrying capacities of vehicles from 2 to 3 contributes to a rapid increase in the coordination of the density of distribution of the batch volume and shipment to the structure of the vehicle fleet in terms of carrying capacity and is characterized by an increase in the coefficient of compliance on average from 0.65 to 0.75. An increase in the range of carrying capacity up to interval 5 increases the value of the compliance coefficient to 0.8, a further increase in the intervals causes an inversely proportional increase in the compliance coefficient. An increase in the number of car models from 1 to 3 causes a decrease in the cost of transportation in the range of 8% - 11.3%, depending on the degree of use of the vehicle fleet. Further expansion of the model range to 7 units practically does not affect the cost of transportation, and then its growth is observed due to an increase in the duration of downtime while waiting for the proper consignment. It was revealed that an increase in the average weight of a shipment by 2.3 times causes a decrease in the cost of transportation 1.79 times, and with this decrease in the weight of a shipment, an increase in the intensity of growth in the cost of transportation is observed.

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