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 Study of the Backhoe’s Digging Modes at Rock Face Working-Out

2019 ◽  
Vol 105 ◽  
pp. 01024 ◽  
Author(s):  
Oleg Litvin ◽  
Vladimir Makarov ◽  
Andrey Strelnikov ◽  
Ekaterina Tyuleneva
Keyword(s):  
Open Pit ◽  
Open Pit Mining ◽  
Rock Layer ◽  
Rock Face ◽  
Bench Height ◽  
The One ◽  
Working Out

As is known from the classic works on open pit mining, the bench is a separately developed part of the rock layer, having the form of a step. It should also be noted that it is necessary to clearly differentiate the concepts of “bench height” and “height of the layer to be removed.” The benches are often divided into subbenches, developed by different excavation equipment or by the same equipment both sequentially and simultaneously, but having transport routes that are uniform for the bench. As an example, an excavator stripping of the upper and lower subbenches with loading, respectively, at the level of the excavator and above this level, is usually given, that is, the transport route (road) passes through an intermediate platform bench located in the middle of its height. Therefore, the excavation layer of any height, which is, in fact, a part of the working bench, can be considered as an independent bench with all its attributes, but in order to avoid duplication of definitions, this paper suggests the name “extraction layer”. When developing this element various digging modes can be applied. In this paper, we studied the main modes and selected the one that provides the highest performance.

scholarly journals Using the method of electrical imaging for obtaining the modulus of elasticity in open cast mining

2020 ◽  
Vol 192 ◽  
pp. 01030
Author(s):  
Pavel Zuev ◽  
Andrey Vedernikov ◽  
Danila Grigoriev
Keyword(s):  
Physical Properties ◽  
Elastic Waves ◽  
A Priori ◽  
Field Measurements ◽  
Open Pit ◽  
Chrysotile Asbestos ◽  
Calculation Methods ◽  
Open Cast Mining ◽  
Electrical Imaging ◽  
Open Cast

The article presents a description of the methodology for obtaining data on the physical properties of rocks that compose the sides of the open pit for technological optimization of drilling and blasting operations. The methodology is based on field measurements and calculation methods for determining the hardness of rocks at a chrysotile asbestos deposit, which is being mined by an open pit. The physical properties are obtained by comparing a priori geological data with the values of electrical resistivity and the velocities of elastic waves in the rocks. Based on these data, the values of the Young’s modulus are calculated, which characterizes the strength of the rocks composing the array.

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 Technological Solutions for Processing Closed Coal Mines by Open Pit Method

2018 ◽  
Vol 41 ◽  
pp. 01041
Author(s):  
Vladimir Makarov ◽  
Péter Kovacs ◽  
Samuel Dagmar ◽  
Riccardo Paulman
Keyword(s):  
Underground Mining ◽  
Underground Mines ◽  
Residual Effects ◽  
Open Pit ◽  
Open Pit Mining ◽  
Mining Operations ◽  
Environmental Consequences ◽  
Harmful Emissions ◽  
Coal Reserves ◽  
Working Out

The main sources of environmental pollution are: pollution from the residual effects of working out of mine fields by underground method; pollution from secondary mining of mine fields by the open method. The pollution of the environment from the underground mining of mine fields is mainly due to the erosion of the surface of the ditches caused by collapse of the underground workings, spontaneous combustion of the remaining coal reserves and exit of poison gases SO2 and CO to the surface through the cracks from the lower horizons of the worked-out mine fields. This makes actual the research of technological possibilities of harmful emissions reducing when quarrying underground mines’ fields. The environment deterioration from conducting open pit mining operations in the underground mine fields is caused by the technological processes of quarrying (preparation of rock for excavation, excavation, transportation of rocks and coal, dumping), by the objects of the open pit infrastructure (industrial site, transport communications, trenches and other workings, coal storage and rock dumps). The main direction of eliminating the negative environmental consequences of underground mining is the localization or complete isolation of the underground mines influence’ on the surface.

scholarly journals Open-Pit Mine Dewatering Based on Water Recirculation—Case Study with Numerical Modelling

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4576
Author(s):  
Kazimierz Różkowski ◽  
Robert Zdechlik ◽  
Wojciech Chudzik
Keyword(s):  
Numerical Modelling ◽  
Drainage System ◽  
Open Pit ◽  
Open Cast Mining ◽  
Classic Approach ◽  
Water Recirculation ◽  
Hydrodynamic Field ◽  
Open Cast ◽  
Selection Of

The layout of the dewatering system in open-cast mining must be adapted to mining assumptions and to the size of expected inflows, which, in turn, depend on natural conditions and the operation of other mines and groundwater intakes, affecting the arrangement of the hydrodynamic field. This case study analyses possible dewatering solutions related to a change in the mining drainage system: decommissioning by flooding of a depleted deposit and dewatering of a new one located in the vicinity. As part of numerical modelling, a solution was sought to minimise the environmental impact of drainage. Forecast calculations for two drainage alternatives were made. One of the solutions follows the classic approach: independent dewatering of the new excavation. The second solution assumes the recirculation of waters from dewatering of the new mine through their discharge into a closed and flooded pit located in the vicinity. The results of the forecasts for both variants point to the modification of the hydrodynamic field resulting from expected volumes of inflows and different environmental effects. The use of numerical simulations assisted the selection of the optimal dewatering solution.

scholarly journals On Influence of the Earth’s Surface Relief on the Volumes of Overburden at Coal Open Pit Mining with Land-Saving Dumping

2019 ◽  
Vol 105 ◽  
pp. 01031
Author(s):  
Eugeny Kurehin ◽  
Mark Hellmer
Keyword(s):  
Open Pit ◽  
Open Pit Mining ◽  
Angle Of Incidence ◽  
Opencast Mining ◽  
Open Cast Mining ◽  
Coal Deposits ◽  
Complex Mechanization ◽  
Sediment Fraction ◽  
Pit Depth ◽  
Land Saving

Opencast mining of coal deposits is a priority in Russia, while providing coal to the domestic and foreign markets. Despite reasonable concerns about air pollution and greenhouse gas emissions, coal use will continue to be significant in the future. Consequently, it is necessary to introduce less polluting and more efficient technologies in the industry in the coming decades. Coal deposits are being developed by the open method with a limited deposit length. An indicator for estimating volumes is proposed -the ratio of sediment fraction in a quarry. The dependence of the sediment fraction in the quarry on the pit depth, thickness and angle of incidence of the formation of coal seams (with an oblique and steep fall) is established. Recommendations on the use of land-saving dumping for the open-cast mining of coal deposits have been developed. The structure of complex mechanization on dumping is proposed depending on the properties of rocks (soft or bedrock) and types of transport.

scholarly journals Rational parameters of the transportless technological scheme for the development of strata with maximum permissible dip angle

2021 ◽  
Vol 303 ◽  
pp. 01039
Author(s):  
Tatiana Gvozdkova ◽  
Manuela Koščova
Keyword(s):  
Compressive Strength ◽  
Open Pit Mine ◽  
Large Block ◽  
Technological Scheme ◽  
Open Pit ◽  
Special Importance ◽  
Annual Productivity ◽  
Internal Dump ◽  
Dip Angle ◽  
Blasting Method

In this article the rational value of overburden cut width and thickness of transportless overburden at mining of two dispersed flat seams IV-V and VI at Kureinsky section of Sibirginsky open pit mine are presented, which makes it possible to minimize the volume of rock re-excavation under the condition of the planned annual productivity of coal on the open pit and to ensure reduction of stripping costs. This task is complicated by the fact that the dip angle at the section is close to the limit on the condition of the possibility of spoiling of internal dump, and since the overburden rocks of the section are represented mainly by large-block sandstones on the clay cement and siltstones and their compressive strength is 60-80 MPa, then it is required to use a drilling and blasting method of their preparation for excavation. Under such conditions, optimizing the parameters of the transportless excavation scheme is of special importance for effective mining of the section.

scholarly journals Determination of bench, dump and road sliding wedge technological parameters

2021 ◽  
Vol 6 (1) ◽  
pp. 31-41
Author(s):  
I. K. Chunuev ◽  
Yu. M. Levkin ◽  
Zh. Bolotbekov
Keyword(s):  
Rock Mass ◽  
Slope Stability ◽  
Open Pit ◽  
Open Pit Mining ◽  
Dump Truck ◽  
Transport Equipment ◽  
Mining Operations ◽  
Stability Calculation ◽  
Mine Surveying

Mine surveying in mining operations is of particular importance, since all technological processes of the full life cycle of a mining enterprise and, ultimately, its competitiveness depend on the surveying quality, efficiency and reliability. Organizations independently determine the structure of mine surveying services, taking into account the methods applied and the scale of mining. To ensure safe open-pit mining of minerals, it is necessary to permanently assess and monitor the pit bench and wall rock mass condition. Misjudgement of rock physical and mechanical properties, non-observance of the minerals mining and transportation process cycle, changes in climatic conditions and other problems lead to loss of stability of rocks in all parts of an open pit, including in the areas of ore production and mining and transport equipment operation. The existing practice shows that the effectiveness of an open pit wall and bench stability calculation can be achieved using a technique that should take into account the slope deformation and failure mechanism, as well as the nature of the stress-strain state of the open pit rock mass. The studies presented in the paper are based on comparative analysis of the sliding wedge parameters for benches, dumps and roads at open pits using analytical and graphical software packages, and taking into account the static load produced by dump trucks. The study findings allow to establish that: determination of the bench slope stability and the sliding wedge width, performed by the analytical method, gives higher accuracy results than those obtained by the graphical method; the bench slope stability and the sliding wedge width depend not only on the rock physical and mechanical condition, but also on the bench height, the dump truck (plus its freight load) weight per 1 linear meter of the placement area, the distance from the slope edge and other factors; the rock mass is stable and not subject to landslide phenomena for as long as the sum of the holding forces is greater than or equal to the sum of the shearing forces; when using large-sized transport equipment of nonstandard weight in open-pit mining, it is necessary to calculate the safe width of the sliding wedges, taking into account the loads on them (per 1 linear meter), the values of which can be 1.5–2.0 times higher than those calculated for the circular-cylindrical sliding surface.

scholarly journals Problems of Designing Transport Systems of «siberian Antrazit»

2020 ◽  
Author(s):  
Natalia Gorbunova ◽  
Oleg Mirkushov
Keyword(s):  
Operating Conditions ◽  
Open Pit ◽  
Transport Systems ◽  
Open Pit Mining ◽  
Optimal Route ◽  
Opencast Mine ◽  
Shortest Route ◽  
Shortest Distance ◽  
Coal Supply ◽  
Open Cast

Abstract The article discusses the operating conditions of transport systems located in open pit mining of the enterprise of Siberian Anthracite JSC using «Kolyvanskij» opencast mine as an example. The most optimal route for coal supply railway lines from the open pit to the concentration plants was designed, the use of which will increase the enterprise’s productivity and reduce the risks of using vehicles. When searching for the optimal route for coal delivery from «Kolyvanskij» open-pit mine to the «Listvjanskaja-1» and «Listvjanskaja-2» enrichment plants, the method of dynamically programming the optimal route (the optimality principle of R. Bellman) was used as an algorithm. The method of dynamic programming is to determine the shortest distance between nodes (places of intersection of the proposed railway tracks), by successive solutions of which, the shortest route is revealed. Based on the obtained parameters, two designed tracks were compared and, as a recommendation for solving technological issues in the design of transport systems of a mining enterprise it was proposed to use the optimal railway from the open-cast mine to «Listvjanskaja» «2 way» enrichment plant.

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