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Date submitted2016-10-11
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Date accepted
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Date published
Opencast mine parameters sensitivity analysis at preliminary study of a mining project
The article describes sensitivity analysis, aimed at variables dependence detection: to what extent open cast mine ultimate efficiency or performance will be affected when one of the key input variables is changed. The stronger the dependence effect, the higher the project implementation risk. The sensitivity analysis objective is demonstrated – principle factors identification – critical variables, capable of having a serious influence on the project implementation results, and impact verification of progressive (single) factorial changes. Sensitivity analysis in its content is a single-factor analysis. Output, as a basic performance indicator of an open cast mine, characterizes mine development intensity and is determined by mining-engineering and economic factors. It is proved that the impact degree from various parameters on the open cast mine output is characterized by elasticity ratio. The project indicators sensitivity analysis, which was carried out, allowed to establish the impact degree that various parameters have on the open cast mine output, which takes place in a high-angle ore deposit, characterized by elasticity ratio.
- Authors:
- S. I. Fomin
- E. I. Bazarova
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Date submitted2016-11-16
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Date accepted
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Date published
Valuation of sustainable of pit wall
This article respond the question about using the digital photographic data in open-cast mine for specification of structural easing factor and his application for modeling of stsbility in open-cast mines with «Phase2» and «NEDRA».
- Authors:
- M. G. Mustafin
- A. P. Sannikova
- P. I. Yushmanov
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Date submitted2016-10-25
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Date accepted
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Date published
Use of coefficient of output at pit delimitation
In work it is settled an invoice the final depth of a pit of the conditional complex occurrence presented by three minerals. It is shown that when developing complex occurrence it is more expedient to use coefficient of output, instead of overburden ratio.
- Authors:
- G. A. Kholodnyakov
- N. S. Vainonen
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Date submitted2016-11-14
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Date accepted
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Date published
Valuation of sustainable of pit wall based on data of digital photography of outcrop surfaces
This article respond the method of determining the strength parameters of rock is considered a rapid assessment of the current state of stability mine array is described.
- Authors:
- M. G. Mustafin
- A. P. Sannikova
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Date submitted2016-11-14
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Date accepted
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Date published
Investigation of the parameters of stressstate nearbord arrays based sequence miningcombined with open-underground mining diamond mine
The parameters of the stress state of nearbord massif of deep open pit on the example of the field development of the V.Grib. This research was done by numerical simulation using finite elements method.
- Authors:
- A. G. Protosenya
- A. D. Kuranov
- A. N. Shokov
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Date submitted2016-11-01
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Date accepted
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Date published
Characteristics of the strain-stress distribution of the quarry face with different curve
The simulation results of the deformed state of rocks at the side of the open excavation with different forms. The technique of modeling. Emphasizes the importance of studying deformation processes taking into account nonlinearity circuit open excavation.
- Authors:
- M. G. Mustafin
- A. V. Panchenko
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Date submitted2016-11-01
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Date accepted
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Date published
The prediction of underopencast rock mass stress- strain condition during surface-underground development of Koashva deposit
The parameters of underopencast rock mass stress-strain condition for Koashva deposit are defined. The estimation of influence of surface development with opencast on the stress-strain distribution in the mass is revealed. Research is revealed with appliance of finite-elements method.
- Authors:
- A. G. Protosenya
- A. N. Shokov
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Date submitted2016-11-11
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Date accepted
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Date published
Foundations for technical solutions in organizing excavation of open ore pits
To study stochastic mining technical systems of opencast mines, where parallel to clearly defined values random and indefinite factors operate, probabilistic and statistical techniques are mostly used nowadays. Formally, the task of producing a design solution may, under the conditions of indeterminacy be transformed into an equivalent deterministic problem formulated for a risky situation. Uncertainty in the initial mining, geological and technical-economic information available during the design stage may result in changing the principal output characteristics of the opencast mine and undermine its operational efficiency during its exploitation. Lowering the possible economic losses is then possible via designing a stable technological system. To minimize the degree of indeterminacy one first of all needs to identify the area of potential risk, define the probability of its emergence and assess its potential consequences. In case such consequences may be precluded, a clearer more complete understanding of the problem would promote a better thought through reaction to potential risk in the course of implementing design solutions.
- Authors:
- S. I. Fomin
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Date submitted2016-11-16
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Date accepted
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Date published
Particularities of gold ore deposit development in complex environment
Review of the design experience in the open-cut development of a very large gold ore steeply pitching deposit are given. Complicating factors are previous underground workings and pressure subpermafrost waters. Opening of depth horizons by ore and rock incline conveyor shafts. Crushing of ore and rock in an open-pit mine before they are delivered to conveyors by semi-mobile crushers. Water depression by ring-type workings with transportation of the collected water by conveyor shafts.
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Date submitted2016-11-16
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Date accepted
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Date published
Interaction between seismic activity in Kuzbass and open-pit operations
The analysis of graphs shows seismic events repeatability and seismic events distribution during the day, by days of the week and by months was made. It is shown, that seismic activity in Kuzbass region has a mixed natural and manmade character and figures of repeatability have interim character, the majority of seismic events occur in the time of blasting operations in open pit mining, but the distribution by month of the year corresponds to planetary pattern – the larg est number of events takes place in March, August and December. It was suggested that the spring increase in seismic activity lead to reduced stability of mine slopes during the snowmelt of landslides formation.
- Authors:
- S. V. Tsirel'
- A. A. Pavlovich
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Date submitted2016-11-15
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Date accepted
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Date published
Reflectionless observation technique of deforming edges of open-pit mines and spoil dumps
Application of laser scanning for shooting procedure of open-pit mines’ edges and spoil dumps deformations is offered. The results of traditional observations and measurements obtained with the help of the offered technique are compared. Practical implementation in industrial objects is considered.
- Authors:
- P. V. Kol'tsov
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Date submitted2016-11-15
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Date accepted
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Date published
Peculiarities of prof. S.D.Korobov’s algorithm appliance in open-pit boundaries determination and mining operation regime justification
System of embedded contours applied in computer-aided mining-geometrical analysis is appropriate both for open-pit boundaries determination and for optimal advance direction with justification of mining operation regime.
- Authors:
- A. L. Bilin
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Date submitted2016-11-15
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Date accepted
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Date published
Problem solving of design and planning of open pit mining in Mineframe system
The article presents the results of development for computer-aided design and planning of open-pit mines with the Mineframe software. There have been shown such peculiarities of computer-aided planning process as horizon reserves, development of annual cutbacks, searching of quarterly (monthly) volumes, monthly scheduling of equipment operation placed on benches, solution of the problems of ten-day periods, daily and shifts planning based on bench modeling.
- Authors:
- O. V. Nagovitsyn
- S. V. Lukichev
- A. Yu. Alisov
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Date submitted2016-11-13
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Date accepted
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Date published
Changes in operating time of modern domestic EKG exсavators in dependence of their functioning conditions
Domestically produced opencast excavators are shown to be serious competition for foreign hydraulic machinery. It is suggested to estimate the potential of an opencast excavator via its basic operation effectiveness factor equal to the ratio of the scoop payload to the nominal cost of excavator operations under its normal operational conditions. Comparing the theoretical values of standard operations of hydraulic excavators of the third type-and-size group during coal mining with domestically produced EKG-18R on their operation effectiveness factor shows that the excavator exceeds foreign hydraulic models from that group 2.7-3.3 times. Theoretical foundation is provided for a complex of factors that affect the operating time of single scoop open- cast excavators, a structure is offered for the model of comprehensive assessment of operating time for opencast excavators. Complex indicators are substantiated and proposed for supporting operational effectiveness of such excavators. Assessment is offered of operational effectiveness of EKG-18R excavators following the criterion of energy consumption per excavation of a unit of rock mass. Generalization analysis is given of a set of factors that affect the value of operating time for EKG-18R excavators. Proposals are put forward on upgrading the regulations for technical maintenance and repairs of EKG-18R excavators. The task of assessing the technical state of machinery calls for using integral criteria that would enable one to identify the current technical state and the residual resource of machine aggregates, their failure potentially resulting in emergency situations accompanied by considerable property damage. It is feasible to use an integrated indicator of the degree of degradation of s machinery item for such an integrated indicator, retrieved in the course of assessing the current technical state of that item during diagnostic procedures. In its turn, such and integral indicator of the state of an item is defined by the averaged value of diagnostic indicators reduced to their basic values with the account of their individual weight factors.
- Authors:
- S. L. Ivanov
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Date submitted2016-11-14
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Date accepted
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Date published
About determination of potential sliding surface based on stress analysis in pit wall solid
The paper gives description of method of estimation of pit wall based on simulation of sliding surface. The calculation example is given.
- Authors:
- P. I. Yushmanov
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Date submitted2016-11-14
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Date accepted
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Date published
Evaluation of the stability of slopes with using native and foreign software
With permanent increasing of depth of open pit exploitation stress strain behavior of side array changes, so the choice of the necessary and corresponding to reality geomechanical scheme is an important issue. Currently,there is large number of software to estimation the stability slopes. This article provides a comparison of different programs based on numerical method and the method of limiting equilibrium.
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Date submitted2016-11-14
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Date accepted
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Date published
Determination of the stress parameters of nearbord areas of open pits, located in highly stressed rock massif
The parameters of the stress state of nearboard massif of deep ore pitas an example the development of apatite-nepheline Koashvinskoe deposis. This research was performed by numerical simulation using finite elements method.
- Authors:
- A. D. Kuranov
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Date submitted2016-11-03
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Date accepted
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Date published
The ecological negative influence reduction ways on mining regions
Coal mining can result in a number of adverse effects on the environment. Open cast coal mines leaves areas of land that are no longer usable and leaves a scarred landscape with no scenic value. Rehabilitation can mitigate some of these concerns. Mine tailing dumps produce acid mine drainage which can seep into waterways and aquifers with consequences on ecological and human health. Subsidence of land surfaces due to collapse of mine tunnels can also occur. During the mining operation methane, a potent greenhouse gas and a constituent of fire damp, can be released. Wherever it occurs in the world, surface mining of coal completely eliminates existing vegetation, destroys the genetic soil profile, displaces or destroys wildlife and habitat, degrades air quality, alters current land uses, and to some extent permanently changes the general topography of the area mined.
- Authors:
- S. I. Fomin
- A. A. Faul'
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Date submitted2016-11-03
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Date accepted
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Date published
Estimation of influence of sailings of dead rock on the condition of atmospheric air at open-cast mining iron ore of deposits located in northern regions
The given work is devoted research of influence of sailings of dead rock on from atmospheric air for area and to an establishment of actual parameters of the given influence. The card of dispersion of an inorganic dust from external sailings, are defined in values of concentration of an inorganic dust in atmospheric air.
- Authors:
- V. S. Kuznetsov
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Date submitted2016-11-02
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Date accepted
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Date published
Decrease in environmental pollution at work according to regeneration of dumps of dead rock
The questions of reclamation of debris dumps, which are the source of the negative impact on the environment, are considered in this article. The expediency of mine technical reclamation stage without drop off operation is analyzed and also foreign and Russian experience of this method practical realization is reviewed.
- Authors:
- V. S. Kuznetsov
- O. Yu. Kolosov
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Date submitted2016-11-01
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Date accepted
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Date published
The method of the geometric addition of forces over the most stressed slip surface in estimation of open-pit slope stability
Consideration is given to the method of the geometric addition of forces over the most stressed slip surface in estimation of open-pit slope stability. The limits of its application are defined.
- Authors:
- A. M. Mochalov
- A. A. Pavlovich
- V. A. Kubarev
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Date submitted2016-11-17
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Date accepted
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Date published
Anticipating of probable strains slope of coal strip mine «Chernigovets» at seismically impact
Estimation of earthquakes seismic effect for slope stability of coal strip mine «Chernigovets» in Kemerovo region by means of pseudo-static analysis and physical modeling is conducted. Relevancy to take into account not only maximum accelerations but also continuance of oscillations is showed.
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Date submitted2016-10-26
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Date accepted
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Date published
Engineering-geological substantiation of safety building and operation constructions of different function within the lowland Predglintovaya (the Western part of the Leningrad region)
The analysis the characteristics and specificity the formation of Predglintovoy lowlands is carried out. The regularities of changes in the state and the strength of blue clay at the depth of cut, taking into account their degree of disintegration – layering and fracturing. The influence of macro- and microcracks in the blue clay zone predglintovoy on their strength and deformation ability is investigated. Basic provisions of engineering-geological analysis of the territory are developed. Recommendations to improve the safety and reliability estimates of blue clay as base of constructions of different function are offered.
- Authors:
- R. E. Dashko
- A. A. Korobko
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Date submitted2016-10-25
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Date accepted
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Date published
Determination of ore reclaiming efficiency on accumulation and bedding stockyards
Буферно-усреднительный склад в карьере является сложной системой, эффективность функционирования которой зависит от многих факторов. Основным показателем работы внутрикарьерного склада является эффективность усреднения на нем руды.
- Authors:
- V. A. Shevelev
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Date submitted2016-10-25
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Date accepted
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Date published
Quarry capacity of ore relation from bench height
The work evaluated the impact of the bench height on the development of mining operations and quarry capacity of ore. The analysis of the height of the step depends on the area of the ore deposit within the quarry field, as well as the dependence of the length of the scope of work on the angle of the ore body.
- Authors:
- G. A. Kholodnyakov
- M. D. Abdullaev