THE RESOURCE OF AUTOMOBILE TRANSPORT IN OPEN PIT MINING

2015 ◽  
Vol 2 (2) ◽  
pp. 510-514
Author(s):  
Стручков ◽  
V. Struchkov ◽  
Михайлов ◽  
V. Mikhaylov
Keyword(s):  
Open Pit ◽  
Open Pit Mining ◽  
Heavy Duty ◽  
Transport Equipment ◽  
Repair Work ◽  
Factors Affecting ◽  
Far North ◽  
Dump Trucks ◽  
Formation Of Cracks ◽  
Run Up

The article shows the adverse factors affecting the working conditions of transport equipment in open quarries of the far North, the statistics of their failures because of the destruction of load-bearing nodes. The formation of cracks in the frames of heavy-duty dump trucks occurs mainly by the mechanism of fatigue in areas of stress concentration. There is a difference in the run up to the appearance of cracks for dump trucks BelAZ-75306 and BelAZ-75131. Their reliability is lower than other foreign counterparts. The complexity of the repair work is twice the complexity of the repair of dump trucks of similar capacity. In article given the basic requirements to the repair welded joints.

scholarly journals On possible changes in the calculation of parameters of transport technology of open pit mining with the use of autonomous heavy platforms

2021 ◽  
Vol 315 ◽  
pp. 03015
Author(s):  
Dmitry Stenin
Keyword(s):  
Positive Impact ◽  
Open Pit ◽  
Open Pit Mining ◽  
General Study ◽  
Open Pit Mines ◽  
Calculation Of Parameters ◽  
Transport Component ◽  
Urgent Task ◽  
Transport Cycle ◽  
Dump Trucks

Reducing the costs of the transport component, reaching up to 50% or more of the total cost of the mined coal, is an urgent task that does not require additional confirmation. Since the development of measures to improve the purely technical indicators of motor transport at open-pit mines is beyond the scope of the general study, we will limit ourselves to the search for technological solutions that can have a positive impact on the overall cost of production. This may include, for example, the search for solutions to reduce the duration of the transport cycle and optimization of its components. It is also necessary to study the possible changes in the indicators of the transport technology of open-pit mining when using classic open-pit dump trucks and autonomous heavy platforms (unmanned open-pit haul trucks). The article presents an analysis of existing technical and technological solutions and research on the use of unmanned transport technologies. It is established that the parameters of transport technology will change to some extent with the introduction of unmanned heavy platforms, which will inevitably lead both to the correction of the existing regulatory documentation, and a possible revision of the classical postulates of open-pit mining.

Changes in the Atmospheric Pressure as an Unfavorable Factor of Work in the Deep Open Pits

2021 ◽  
pp. 35-38
Author(s):  
O.N. Dragunskiy ◽  
◽  
M. Rivkin ◽  
Keyword(s):  
Blood Pressure ◽  
Atmospheric Pressure ◽  
Dead Sea ◽  
Open Pit ◽  
Open Pit Mining ◽  
Sharp Change ◽  
Normative Documents ◽  
Dump Trucks ◽  
The Dead

The need in considering changes (including sharp) of the atmospheric pressure during the operation of deep open pits as one of the unfavorable factors is substantiated. It is believed that the atmospheric pressure in a particular region varies slightly-within 30–40 mm Hg per year. But at the present time, when only in Russia there are five open pits with a depth of 500 m and more, it is impossible to ignore changes in the atmospheric pressure in relation to workers moving, for example, by motor transport, from the surface to the bottom of the open pit and back. In this case, it can change by 50 or more mm Hg in half an hour. To solve the related problems, it is required to find out how atmospheric pressure affects the blood pressure of the open pit workers. The experience of the Dead Sea Clinic located in Israel at the Dead Sea at a depth of more than 400 m below the sea level is taken as a basis. Long-term measurements of the blood pressure in patients of the clinic revealed a tendency to decrease it by an average of 10–20 mm Hg. To prevent the adverse effect of a sharp change in the atmospheric pressure on people working in deep open pits, it is required to provide for appropriate measures of a different nature: technological (provide for changes in the characteristics of the open pit roads to ensure smoother descents and ascents of the dump trucks); technical (use of the conveyor and combined transport); organizational (including changes in the work and rest regimes of the working employees); regulatory (amendments to the relevant safety rules and other normative documents). To apply the results obtained in the open pit mining, it is necessary to conduct appropriate research in the operating deep open pits.

scholarly journals The Results of Mining and Geometric Analysis in Open Pit Mining of Promising Kuzbass Coal Deposits with Block System

2020 ◽  
Vol 174 ◽  
pp. 01020
Author(s):  
Alexei Selyukov ◽  
Andrey Gerasimov ◽  
Valery Grishin
Keyword(s):  
Geometric Analysis ◽  
Open Pit ◽  
Open Pit Mining ◽  
Overburden Rock ◽  
Mining Method ◽  
Resource Saving ◽  
Development Costs ◽  
Coal Deposits ◽  
Dump Trucks ◽  
Mining Procedure

Currently, in developing the most inclined and steep coal deposits in the Central and Northern Kuzbass (Western Siberia, Russia), the deeping longitudinal open pit mining method is used with overburden rock moved to external dumps using transport technology. One of the ways to reduce the rate of land withdrawal while reducing development costs by shortening the distance of overburden movement is to use block lateral mining method with overburden storage in the worked out space. The paper emphasizes that well-known technological solutions consider quarry fields untouched by mining, or in the process of exploitation, so the block mining procedure is using fragmentally along with moving overburden by dump trucks. Internal dumping, as an element of land preservation, has not been generally considered to date. This is a deterrent to the implementation of resource-saving mining technologies, both in design and mining practice.

scholarly journals Modelling for degreasing the mining equipment downtime by optimizing blasting period at Erdenet surface mine

2021 ◽  
Vol 280 ◽  
pp. 08001
Author(s):  
Khavalbolot Kyelgyenbai ◽  
Serhii Pysmennyi ◽  
Serhii Chukharev ◽  
Batbolor Purev ◽  
Ijilmaa Jambaa
Keyword(s):  
Open Pit ◽  
Open Pit Mining ◽  
Dump Truck ◽  
Mining Equipment ◽  
Weekly Basis ◽  
Surface Mine ◽  
Molybdenum Deposit ◽  
The World ◽  
Dump Trucks ◽  
Mining Works

Erdenet copper-molybdenum deposit is the biggest one in the world and has a significant impact on Mongolian society and economy. Today LIEBHERR-994B hydraulic shovels from Germany, electric shovels including EKG-10 and EKG-15 from Russia operate for the mining works, and dump truck BelAZ - 75130 used for transportation. The causes of shovel downtime are classified as technical, technological, and organizational. During the study period, 41% of the total downtime of the excavator’s park was technical, 45% was technological, and 11% was organizational downtime. For shovels, 7% of technological downtime is due to blasting, and for dump trucks 8.7%. In open-pit mining, blasting is performed on a weekly basis, so the duration of this technological downtime can be considered almost constant. If the time between blasts or period of blasting can be arranged optimally, it will be possible to reduce mining equipment’s downtime due to blasting.

scholarly journals Autonomous mining dump trucks

2020 ◽  
Vol 59 (3) ◽  
pp. 123-130
Author(s):  
Mark Leont’evich KHAZIN ◽  
Keyword(s):  
Human Error ◽  
Human Factor ◽  
Mining Industry ◽  
Developed Countries ◽  
Open Pit ◽  
Open Pit Mining ◽  
Mining Equipment ◽  
Labor Costs ◽  
Mining Company ◽  
Dump Trucks

Research aim is to reduce the costs of a mining company and the number of accidents by increasing the efficiency of the use of equipment and eliminating the human factor. Research methodology: analysis of possible areas of application of autonomous mining dump trucks and problems associated with this process. Results. Mining is carried out in difficult mining conditions, which makes the presence of people in the working area of the quarry problematic. Mining companies are looking to cut costs and make jobs safer, especially in developed countries with high labor costs. The use of dump trucks with remote and autonomous control systems in open pits makes it possible to increase the safety and efficiency of open pit mining, reduce the influence of the human factor and increase the productivity of mining machines. While human drivers can do their job well, autonomous trucks can drive the exact route every time without getting bored, tired or resting. The car does not need clean air, good visibility and a lunch break. At the same time, mining autonomous dump trucks can be used in remote-controlled, semi-autonomous and autonomous modes, and the driver in them is replaced by a central controller and a local self-management system. The robot does not get tired and does not make mistakes, it can work 24 hours a day. Eliminating human error and regular training improves safety and increases the productivity of a mining operation. Such companies as BelAZ, Komatsu and Caterpillar are the leaders in the production of autonomous mining dump trucks. Conclusions. The introduction of autonomous transportation allows the mining company to actually reduce its operating costs. While autonomous technologies are still in their infancy, they continue to evolve. Complex solutions will be of great interest - centralized systems that allow working with a fleet of autonomous vehicles and other mining equipment. Therefore, this direction today is the most developing and promising, and the use of autonomous dump trucks in the mining industry is no longer a distant prospect, but a reality of today

scholarly journals Development of technological schemes for open-pit mining of deposits using “mobile crushing-reloading-conveyor complexes”

2020 ◽  
Vol 201 ◽  
pp. 01010
Author(s):  
Tulkin Annakulov
Keyword(s):  
Technological Scheme ◽  
Open Pit ◽  
Open Pit Mining ◽  
Transport Equipment ◽  
Cyclic Flow ◽  
Open Cast Mining ◽  
Annual Productivity ◽  
Sequential Mining ◽  
Working Out ◽  
Open Cast

This article analyses the use of cyclic-flow technology schemes with mobile crushing and reloading complexes in open cast mining. An analysis of the application of cyclic-flow technology schemes with mobile crushing and reloading complexes in open cast mining shows that the main directions of its radical improvement are the development, creation and implementation of fundamentally new mining transport equipment and technological schemes for its quarries, which include: “mobile excavators crushing and transhipment plants and conveyor systems". Technological schemes for the development of rocks with an end arrangement of mobile complexes using a single bucket excavator and conveyor transport, with an end arrangement of mobile complexes and an increased width of the working platform during conveyor transport, with an end arrangement of mobile complexes and the presence of a mobile interstage loading crane with sequential mining at three horizons, a methodology has been developed for determining the working time and annual productivity of mobile crushing and handling conveyor complexes and a new technological scheme for the development of overburden ledges using mobile crushing and handling conveyor complexes. To reduce the time for idling the complex and reduce the number of exit ledges, a new technological scheme for the development of overburden ledges with the use of mobile complexes is recommended. As a result of the calculations according to the developed method, when working out two benches with different block lengths, the dependence of the annual productivity of the complex on the block length was established.

scholarly journals The technique of wavelet transforms in the computer-aided system for controlling the unmanned dump trucks movement

2021 ◽  
Vol 1 (3) ◽  
pp. 106-114
Author(s):  
Ivan V. Chicherin
Keyword(s):  
Wavelet Transforms ◽  
Matching Pursuit ◽  
Unmanned Vehicles ◽  
Open Pit ◽  
Open Pit Mining ◽  
Frequency Distributions ◽  
One Dimensional ◽  
Time Frequency ◽  
Computer Aided ◽  
Dump Trucks

Introduction, purpose of the work. Within the framework of the computer-aided system, the technology of a method is formed to control the current trajectories (CT) of unmanned vehicles (UMV) when they move along quarry routes in open-pit mining. The purpose of the presented research is to analyze the application of the wavelet transforms technique to the problem of routing unmanned vehicles when they move along quarry routes. Methodology. The results of modeling one-dimensional signals corresponding to the UMV current trajectories are presented, when the latters deviate to the left / right from the nominal axial trajectory (NAT), as well as their time-frequency distributions in the wavelet medium. The algorithm of the procedure for displaying scalar signals is developed and described to control UMV CT in a complex medium of time-frequency wavelet transforms. This transformation allows you to monitor the movement of UMV in a functionally transparent and informative way and effectively manage the processes of trajectory routing of dump trucks in the quarry. The analysis of research results. The processes of modifying the current trajectories of the UMV movement under the control of the computer-aided system are generated using the methods of wavelet transforms. They are based on algorithms for projecting trajectory signals with a time-dependent frequency (chirp signals) onto a set of wavelet functions within a wavelet thesaurus (wavelet dictionary), wavelet matching pursuit procedures, and representing scalar signals in a specific multidimensional medium of Cohen’s class time-frequency distributions. Simulation results in the form of waveform trajectory (CT-) signals and their three-dimensional Wigner time-frequency maps representing the movement of UMV in a start-stop mode, and the signals of formed continuous deviation trajectories while they deflect to the left and right of NAT. The algorithm for generating a 3D-image of a UMV current trajectory one-dimensional signal is presented. Conclusion. It is concluded that the mathematical technique of wavelet transforms is the most appropriate and effective one for computer-aided monitoring and controlling the dynamics of UMV moving along opencast mine routes.

scholarly journals Analysis of Environmental Costs’ Effect in Green Mining Strategy Using a System Dynamics Approach: A Case Study

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Amir Jafarpour ◽  
Siamak Khatami
Keyword(s):  
System Dynamics ◽  
Large Scale ◽  
Mining Operation ◽  
Open Pit ◽  
Open Pit Mining ◽  
Processing Plant ◽  
Environmental Costs ◽  
Mining Operations ◽  
Factors Affecting

Nowadays, one of the most significant problems in mining activities is the significance of analyzing environmental issues along with mining, concentration, and mineral processing operations to achieve the goals of sustainable development. Nevertheless, mine owners refuse to include environmental costs (EC) and consider them unprofitable. Due to the ever-increasing importance of environmental and social topics in recent years, there is a vital need for assessing the EC and its impact on total mining costs and implementing green strategies by the mining managers and engineers. The current study tries to model the mining cost structure by considering the causal relationships between different factors affecting open-pit mining costs to highlight the EC’s role. Furthermore, this research evaluates the effectiveness of implementing each possible mining green strategy in a large-scale copper mine using the System Dynamics (SD) approach. In this regard, seven scenarios and a combination of different environmental strategies, including mine reclamation, an environmental strategy for a condensation and processing plant, and environmental mining operations, have been considered for the SD-based economic analysis. The simultaneous use of the green mining strategies for the concentration and processing plant (Scenario 4) shows a high impact on cost reduction in the mining operation.

scholarly journals TECHNOLOGICAL PECULIAR FEATURES IN DEPOSIT OPENING OF SOLID MINERALS WHILE USING ARTICULATED DUMP TRUCKS

2018 ◽  
Vol 17 (3) ◽  
pp. 238-245
Author(s):  
A. V. Glebov
Keyword(s):  
Import Substitution ◽  
Ore Deposits ◽  
Open Pit ◽  
Open Pit Mining ◽  
Dump Truck ◽  
Design Decision ◽  
Wheel Drive ◽  
Road Tunnels ◽  
Dump Trucks ◽  
Four Wheel Drive

The paper provides an analysis for production of four-wheel drive dump trucks with an articulated frame and it also describes a practical experience pertaining to operation of dump trucks as mining automotive transport. Technical characteristics for some models of articulated dump trucks manufactured in Russia and Belarus are presented in the paper. The paper gives examples for transportation of run-of-mine ore at enterprises of Russia and abroad. The attention has been focused on specific features concerning organizational, technological and design decision making while introducing and promoting articulated dump trucks. It has been established that articulated dump trucks make it possible to improve an efficiency of mine development during construction period and when ore mining and processing enterprises are put into operation especially in geographically remote and inaccessible areas. The paper proposes technological solutions allowing to expand the scope of articulated dump truck application at mining enterprises while using them for quarry development excavating deep deposits of solid minerals. It has been revealed that reduction in overburden volume can be achieved by transition from a certain depth to lower capacity dump trucks or special dump trucks operating on elevated slopes of roads. The paper shows that one of perspective directions for development of mining technology on kimberlite deposits is an opening of lower quarry horizons by peripheral road tunnels of spiral shape while using articulated dump trucks. The presented technological solutions require further research and design consideration and study and they will allow to ensure resource efficiency and safety of surface mining while extracting minerals at previously uneconomic ore deposits. In order to realize an import substitution program for four-wheel drive dump trucks with an articulated frame it is necessary to carry out marketing research on potential market for machines of this class required for open-pit mining in order to justify prospects for provision of the Russian production market.

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