scholarly journals Annual production enhancement at deep mining

2019 ◽  
Vol 123 ◽  
pp. 01043 ◽  
Author(s):  
Nataliia Shvaher ◽  
Tetiana Komisarenko ◽  
Serhii Chukharev ◽  
Svitlana Panova
Keyword(s):  
Iron Ore ◽  
Underground Mine ◽  
Annual Production ◽  
Direct Proportion ◽  
Operating Life ◽  
Mining Operations ◽  
Deep Mining ◽  
Second Stage ◽  
Mining Depth ◽  
Mining Enterprise

The article aims at determining possible annual production considering mining and technical capabilities of the underground mine. Deepening of mining operations at Kryvyi Rih iron ore basin reduces considerably annual production of the useful mineral which results in increased mining costs. To maintain annual production, it is reasonable to build the second stage of opening the depth of which depends on production volumes. When determining the optimal depth of the first stage opening, it is necessary to apply a complex research method including the graphoanalytical one for determining the underground mine’s annual production and the industrial one for adjusting the methods considering technical conditions of the enterprise. It has been determined that annual production is influenced not only by mining and geological but also by mining and technical conditions. It has been proved that annual production of an underground mine decreases in direct proportion to the increased depth of mining. The speed of skips in the shaft is greatly impacted by the length of the main opening and its operating life. With the increase of the shaft operating life the skip speed decreases from 12 to 6 – 8 m/s. When designing the flowchart of further opening of underlying levels, it is necessary to consider both mining capabilities and technical conditions of the shaft and headgear, mining depth and the main opening operating life as well as the strategy of the mining enterprise. Consideration of the above mentioned factors enables maintaining the required annual production when mining iron ores at great depths. Under conditions of Kryvyi Rih iron ore basin, it has been determined reasonable to apply the main vertical shaft flowchart when mining reserves to the depth of 1650 m.

scholarly journals Investigation and optimization of main materials consumption when mining iron ores at deep levels of the Underground Mine Group of the PJSC “ArcelorMittal Kryvyi Rih”

2020 ◽  
Vol 201 ◽  
pp. 01026
Author(s):  
Mykola Stupnik ◽  
Vsevolod Kalinichenko ◽  
Olena Kalinichenko ◽  
Sofiia Yakovlieva
Keyword(s):  
Strain State ◽  
Iron Ore ◽  
Deep Levels ◽  
Underground Mine ◽  
Underground Mines ◽  
Iron Ores ◽  
Efficient Technology ◽  
Mining Depth ◽  
Geological Conditions ◽  
Qualitative Characteristics

The work considers conditions of deep levels of the Underground Mine Group for underground ore mining (as underground mines) of the Mining Department of the PJSC “ArcelorMittal Kryvyi Rih” (the PJSC “ArcelorMittal Kryvyi Rih”). The research aims to improve indicators of mined ore mass extraction when mining rich iron ores through studying and optimizing consumption of explosives, enhancing mining technology to provide fulfilment of the underground iron ore mining program. During the research, there are analyzed mining geological and technical conditions of the deposit mining as well as current technologies of iron ore mining at the Underground Mine Group of the PJSC “ArcelorMittal Kryvyi Rih”. The work analyzes the achieved indices and consumption of explosives for drilling and blasting at the Underground Mine Group. The mining geological and technical conditions of the deposit mining as well as current technologies of mining, parameters of preparatory operations, the nomenclature and qualitative characteristics of many types of explosives are determined to have changed. This complicates planning consumption of explosives and making their estimates for work sites. However, this is a reason for selecting highly efficient technology and machinery in deteriorating mining and geological conditions of operating at over 1200 m depths. The work determines dependencies of a stress value on a mining depth and physical properties of rocks, as well as parameters of drilling and blasting operations considering the stress-strain state of the massif under high rock pressure at deep levels of the Mining Group of the PJSC “ArcelorMittal Kryvyi Rih”.

scholarly journals Conceptual basis of mining intensification by the geomechanical factor

2019 ◽  
Vol 109 ◽  
pp. 00089
Author(s):  
Serhii Skipochka
Keyword(s):  
Experimental Research ◽  
Iron Ore ◽  
Mineral Resources ◽  
Fixed Costs ◽  
Conceptual Basis ◽  
Mining Operations ◽  
Materials Analysis ◽  
Analysis And Synthesis ◽  
Protective Structures ◽  
Negative Phenomena

The goal of the work was to develop a concept of intensification of mining operations, taking into account geomechanical processes occurring in the “rock massif – mining workings – support and protective structures” system. The article is the result of theoretical and experimental research materials analysis and synthesis, carried out for the conditions of coal, non-metallic and iron-ore mines. Positive and negative geomechanical processes and phenomena, occurring during intensification of mining operations, have been substantiated. A set of technical and technological solutions to eliminate the negative phenomena associated with high mining rates development of mineral resources has been proposed. Recommendations, presented in this article, will significantly reduce the conditionally fixed costs of mining production and improve miner’s safety.

Justification of engineering safety criteria for undermining of water-proof layer in the Upper Kama Salt Deposit

2021 ◽  
pp. 57-63
Author(s):  
A. A. Baryakh ◽  
L. O. Tenison
Keyword(s):  
Water Soluble ◽  
Russian Science ◽  
Mining Operations ◽  
Subsidence Trough ◽  
Safety Criterion ◽  
Mining Depth ◽  
Mine Sites ◽  
Main Thing ◽  
Water Proof

Safety of a water-proof pillar between the stoping void and the aquifers defines the key feature of water-soluble mineral mining. In this regard, the most important element of geomechanical supervision of mining operations, especially, at the mine project stage, is the engineering safety criteria aimed at the adequate valuation of safe undermining of water-proof strata (WPS). The WPS safety procedures now in force calculate only maximal sagging of undermined beds and disregard deformation in the edge area of WPS. In the meanwhile, the edges of WPS are the areas of localization of maximal horizontal strains, and the hazard of vertical jointing is the highest in these areas. In this connection, in the capacity of the index of the manmade load on WPS, it is proposed to use the maximal slope of the edge area of the subsidence trough. The evaluations were carried out in 6 Uralkali’s mine sites selected from the mathematical modeling and geophysical survey data which exhibited considerable damage of WPS. Based on the implemented research and justifications, it is recommended to use the generalized safety criterion for undermining of WPS as a maximal subsidence/mining depth ratio which is directly proportional to the ground slope. This engineering procedure describes more adequately the fracture mechanism in WPS rocks, in particular, damage localization in edge areas of the subsidence trough, or influence of mining depth on WPS stability and, which is main thing, is based on the criteria derived from the long-term observations and measurements performed in the Upper Kama deposit. The study was supported by the Russian Science Foundation, Grant No. 19-77-30008.

scholarly journals Geomechanics of overworked mine working support resistance in the laminal massif of soft rocks

2020 ◽  
Vol 201 ◽  
pp. 01003
Author(s):  
Iryna Kovalevska ◽  
Hennadii Symanovych ◽  
Jacek Jarosz ◽  
Mykhailo Barabash ◽  
Oleksandr Husiev
Keyword(s):  
Mine Working ◽  
Computational Experiment ◽  
Strain State ◽  
The Finite Element Method ◽  
Mining Operations ◽  
Soft Rocks ◽  
Second Stage ◽  
Support Resistance ◽  
Complicating Factors ◽  
Water Cut

The relevant issues of ensuring trouble-free mining operations on the underlying horizons, which are partially or fully overworked are studied in this paper. The problem has been solved using the example of a laminal massif of the Western Donbas soft rocks; complicating factors were taken into account: water-cut, fracturing, and the rheological properties manifestation. The model, proposed for calculation, has been substantiated in view of geomechanics, as well as the finite element method has been chosen to obtain the stress-strain state of the adjacent massif and support. At the first stage, mine observations of the state of mine working planned for overworking have been conducted and analysed. At the second stage, a computational experiment has been conducted in the most difficult areas. The stresses fields have been analysed according to vertical, horizontal and stresses intensity components of the soft rocks laminal massif, as well as their distribution curves for the recommended and basic fastening options. It has been proved that the recommended parameters of the fastening structure provide repair-free mine working maintenance for the entire exploitation period with account of overworking. Recommendations have been developed for mining the seam C6 in M.I. Stashkova Mine, DTEK Pavlohradvuhillia PJSC.

scholarly journals INVESTIGATION OF THE RANDOM VALUE STATISTICAL DISTRIBUTIONS MODELS CHOICE INFLUENCE ON THE MINING OPERATIONS MODELING RESULTS

2021 ◽  
Vol 21 (3) ◽  
pp. 130-137
Author(s):  
A.V. Zatonskiy ◽  
◽  
P.A. Yazev ◽  
Keyword(s):  
Simulation Model ◽  
Mining Machine ◽  
Statistical Distributions ◽  
Mining Operations ◽  
Stochastic Delay ◽  
Uniform Distributions ◽  
Potash Mining ◽  
Mining Enterprise ◽  
Stochastic Parameters ◽  
Similar Simulation

The importance of production planning for improving the performance indicators of a mining enterprise is indicated. The possibility of simulation modeling using for this aim is shown. It is shown that the created model has a large number of stochastic parameters. It is investigated that there is a problem of research lack about the choice influence of the mining modeling results with different statistical distributions. It is known that with an increase in stochastic deviations from the initial parameters, the productivity of queuing systems decreases. Purpose of work is to study this influence with four statistical distributions of a random quantity (uniform, normal, negative bi-nomial and Poisson distribution) for individual operations and their combinations. In addition, it is necessary to determine how much a change in one particular parameter will affect the overall result of the modeling. Materials and methods. In the previously created simulation model, a stochastic delay is added to the time of individual operations. The addition of such a delay with different sta-tistical distributions and with the same mathematical expectation is investigated. The simulation re-sults are compared with each other, for each individual operation the absolute and relative devia-tion of the results is shown. Further, a similar simulation is performed when all the simultaneously selected parameters changing. Result. It is shown that the magnitude of the deviation significantly differs among all deviations. It is shown that for various single changes in operations, the largest and smal-lest deviations can be given by different statistical distributions. To study the joint change with all parameters, 3 modeling scenarios are implemented: all uniform distributions (this case is used now), the scenario with the smallest deviation and the scenario with the largest deviation. It is shown that switching to another scenario leads to a significant change in the simulation. Conclusion. It is con-cluded that the used significant influence of statistical distributions choice to the accuracy of model-ing the operation of the mining machine is shown, especially when they are taken into account to-gether. The results can be used to clarify the influence of individual factors in the simulation model and improve the planning of potash mining operations, for individual mining machines too.

CALCULATION OF INDICATORS OF ENVIRONMENTAL IMPACT OF MINING ENTERPRISES ON THE STATE OF THE NATURAL ENVIRONMENT

2021 ◽  
pp. 17-22
Author(s):  
Olha Bohomaz ◽  
◽  
Оlena Zavialova ◽  
Keyword(s):  
Environmental Impact ◽  
Natural Environment ◽  
The State ◽  
Practical Significance ◽  
Mining Operations ◽  
Mining Enterprise ◽  
Physical Fields ◽  
The Impact ◽  
Impact Of Mining ◽  
Specific Impact

Purpose. The aim of the work is to quantify the indicators of the environmental impact of mining enterprises on the state of the natural environment during the operation of a mining enterprise and after its liquidation. Method. The paper uses a computational and analytical research method. Results. Based on the calculations performed, it was established that the specific assessment of the environmental impact on the biosphere components of the Mining Enterprise PJSC "MM "Pokrovskoe" for the entire estimated period of the mine's existence: lithosphere – 0.071; hydrosphere – 0.02; atmosphere – 0.77; biota – 0.009; physical fields – 0.13. After the liquidation of the mine, due to the termination of coal mining operations from methane-free coal seams, the absence of emergency gas emissions, as well as a decrease in noise and heat pollution, the specific impact on the atmosphere (0) and physical fields (0.0004) is significantly reduced, but at the same time, the impact on the hydrosphere (0.26) and lithosphere (0.72) significantly increases, which is associated with changes in the hydrological regime of water and the deterioration of mine discharges of water quality in the hydrographic network due to pumping mine effluents to the daytime surface, with the dry method closing the mine, and waterlogging of the territory with a wet and combined method of closing the mine. The indicator of specific impact on the biota (0.009) does not change. Scientific novelty. A methodology for calculating indicators of the environmental impact of mining enterprises on the state of the natural environment is proposed. Practical significance. The obtained indicators of environmental impact on the components of the biosphere can serve as a basis for developing measures to reduce the negative manifestations of mining enterprises on the state of the natural environment. Key words environmental risk, mining enterprise, biosphere components, environmental impact.

scholarly journals Operational Control of the Feed of the Harvester

2019 ◽  
Vol 105 ◽  
pp. 01009
Author(s):  
Sergey Kubrin ◽  
Konstantin Kopylov
Keyword(s):  
Operational Control ◽  
Coal Seams ◽  
Mining Operations ◽  
Technological Processes ◽  
Mining Enterprise ◽  
Geological Conditions ◽  
Operational Management ◽  
Mining Coal ◽  
The Right ◽  
Planning Production

Comparison of normative and actual indicators on mining testifies to inefficient work of the excavating equipment. The results of the correlation analysis of the speed of movement of the harvester relative to the section of the support with the readings of methane sensors revealed a significant dependence. When conducting mining operations in complex geological conditions at great depths, a joint step-by-step carrying out of various technological processes is required to ensure the preparation, opening and excavation of reserves and the creation of safe conditions for mining coal seams. At the same time, efforts should be made to minimize time, human and energy resources. In this regard, of particular importance is the right choice of the program of operational management of technological processes of mining, monitoring the implementation of technological operations for the timely detection of deviations from the selected mode, adjustment of the established current modes of operation of technological processes and the development, if necessary, measures aimed at reducing the risks of accidents. A promising direction of solving this problem is the use of modeling methods. The developed models of technological processes of the mining enterprise will allow planning production and supporting decision-making in the implementation of operational management.

The Mechanism of Ensuring Ecological and Economic Efficiency of the Iron-Ore Deposit Exploitation

2017 ◽  
Vol 22 ◽  
pp. 128-134
Author(s):  
Vasiliy Prokopenko ◽  
Olexandra Tymoshenko
Keyword(s):  
Economic Efficiency ◽  
Iron Ore ◽  
Raw Materials ◽  
Low Grade ◽  
Investment Funds ◽  
Ore Deposit ◽  
Mining Enterprise ◽  
Fixed Assets ◽  
Industrial Complexes ◽  
Iron Ore Deposit

Components of constantly renewed cycle of formation the investment on maintaining of productivity fixed assets of production and a mechanism of ensuring the environmental and economic efficiency during exploitation of iron ore deposit is substantiated. The methodic fundamentals in investing of expanded reproduction of fixed assets on the mining enterprise for increasing the completeness of using the operational stocks of ore raw materials have been developed. The possibility and advisability of investing in reproduction of fixed assets due to additional revenue from the sale of products made from rich ore are proved, which creates a profitable conditions for processing low-grade ore stocks. It is achieved through the expanded reproduction of fixed assets, that is able to maintain the pit capacity depending on the degree and time of its deepening. On the example of Poltava MPP it is estimated the possibility of industrial complexes to accumulate profits from operations for the extended reproduction of fixed assets. It is proved that the plant will be able to allocate the necessary investment funds if mineral ore reserves is processed with a reduction of its quality.

Sign in / Sign up

Export Citation Format

Share Document