scholarly journals DEVELOPMENT OF THE MECHANISM OF ACTION OF DECONCENTRATED CHARGES OF VARIOUS SHAPES FOR VARIOUS MINING CONDITIONS

2021 ◽  
Vol 2 (3) ◽  
pp. 135-143
Author(s):  
Sergey D. Viktorov ◽  
Vladimir M. Zakalinsky ◽  
Andrey A. Eremenko ◽  
Ivan E. Shipovskii ◽  
Rafael Ya. Mingazov
Keyword(s):  
Mechanism Of Action ◽  
Energy Flow ◽  
Mining Science ◽  
Mining Operations ◽  
Field Development ◽  
Mining Conditions ◽  
Borehole Charge ◽  
Complex Development ◽  
Destruction Of Rocks ◽  
Explosive Process

The modern requirements of the market economy and the increasing complexity of the field development conditions require new scientific and technical approaches in deep quarries and mines in the complex development of subsurface resources. As you know, the dominant mining paradigm in drilling and blasting is associated with the technique of drilling wells and boreholes of a circular shape (cavity) with the placement of explosives in it. However, in mining science and practice, the variety of mining conditions has long required the creation of methods for the destruction of rocks with an asymmetry in the distribution of explosion energy in space and its maximum concentration in certain directions. In this regard, we consider a conceptual direction based on a fundamentally new mechanism of action of the explosion of known groups of parallel-converged borehole charges, which effectively expand their use in various mining applications. The development of a new mechanism of action of the explosive process with the use of a computer program and numerical simulation of calculations made it possible to use the change in the shape and design of the charge as a means of increasing the share of the energy flow of the explosive explosion in a certain direction. The design of the deconcentrated charge is shown as a means of increasing the fraction of the energy flow of the explosive explosion in a given direction, which leads to a significant increase in the efficiency of the directed explosion and, in particular, minimizes its action in the opposite," legit", direction. Based on the results of the research, a method of blasting operations is proposed to neutralize the influence of anomalies in the state of the massif on mining operations by the explosive method. The method includes the appropriate tools, characterized by an unconventional design of the borehole charge and using a mechanism for influencing the anomalous states of the array with a combination of its explosive features.

scholarly journals Prediction of Mining Conditions in Geotechnically Complex Sites

Mining ◽  
2021 ◽  
Vol 1 (3) ◽  
pp. 279-296
Author(s):  
Marc Elmouttie ◽  
Jane Hodgkinson ◽  
Peter Dean
Keyword(s):  
Neural Network ◽  
Historical Data ◽  
Synthetic Data ◽  
Mining Operations ◽  
Body Of Knowledge ◽  
Future Production ◽  
The Neural Network ◽  
Mining Conditions ◽  
Parameter Interactions ◽  
High Level

Geotechnical complexity in mining often leads to geotechnical uncertainty which impacts both safety and productivity. However, as mining progresses, particularly for strip mining operations, a body of knowledge is acquired which reduces this uncertainty and can potentially be used by mining engineers to improve the prediction of future mining conditions. In this paper, we describe a new method to support this approach based on modelling and neural networks. A high-level causal model of the mining operations based on historical data for a number of parameters was constructed which accounted for parameter interactions, including hydrogeological conditions, weather, and prior operations. An artificial neural network was then trained on this historical data, including production data. The network can then be used to predict future production based on presently observed mining conditions as mining proceeds and compared with the model predictions. Agreement with the predictions indicates confidence that the neural network predictions are properly supported by the newly available data. The efficacy of this approach is demonstrated using semi-synthetic data based on an actual mine.

Methane Injury-Risk at the Russian Mines

2021 ◽  
pp. 69-74
Author(s):  
V.S. Zaburdayev ◽  
◽  
S.N. Podobrazhin ◽  
Keyword(s):  
Injury Risk ◽  
Electrical Equipment ◽  
Coal Deposit ◽  
Coal Seams ◽  
Mining Operations ◽  
Mining Conditions ◽  
Scientific Substantiation ◽  
And Control ◽  
Gas Bearing ◽  
Engineering Personnel

Conditions are given concerning the development of methane-bearing coal seams in Russia, the chronology of injuries from explosions and outbreaks of methane-air mixtures at the Russian mines for a quarter of a century of developing coal seams at the nine deposits. The emergency was studied in 174 mine incidents, which occurred mainly at the mines of Kuzbass, Vorkuta coal deposit, Eastern Donbass, Chelyabinsk basin, Primorye and Sakhalin. Emergency objects - excavation areas, preparation faces and mined-out areas of the mines. The sources of ignition of methane-air mixture are drilling and blasting works in the faces, malfunctioning of electrical equipment, frictional sparking, endogenous fires, and smoking in the mines. The most injury-risk for methane are steep and steeply inclined mines. The need in the scientific substantiation of the decisions taken for prevention or reduction of the methane injury-risk at the mines is noted in the article. An important role is assigned to the choice of ways to achieve this goal considering the geological and mining conditions of the development of gas-bearing coal seams. As an example, the conditions, methods, and parameters of mining operations at the excavation areas of four mines are given, where occurred the catastrophic explosions of methane-air and methane-dust-air mixtures. The reasons are gross violations of safety rules during mining operations, incompetence of the mine engineering personnel, design, and control organizations in matters of safety during the underground work at the gas-hazardous mines with an extensive network of workings. This resulted in the death of miners and mine rescuers, the destruction of mine workings, equipment and devices, underground fires. Recommendations are given for reducing the level of methane injury-risk at the methane-rich mines.

scholarly journals Determination of the Overturning Torque of the Cutting Forces of the Knife Actuating Device of the Geokhod

2021 ◽  
Vol 315 ◽  
pp. 03020
Author(s):  
Vladimir Aksenov ◽  
Vladimir Sadovets ◽  
Vyacheslav Beglyakov ◽  
Dmitry Pashkov ◽  
Elena Rezanova
Keyword(s):  
Cutting Forces ◽  
Rotation Axis ◽  
Critical Values ◽  
Total Moment ◽  
Axis Of Rotation ◽  
Mining Conditions ◽  
The Face ◽  
Moment Of Resistance ◽  
Destruction Of Rocks

The paper considers the relevance of the research, indicated by the authors in the title of the article. As a result of the studies carried out, it was found that the overturning torque of the cutting forces occurs as a result of the imbalance of the system of cutting forces during the destruction of rocks by the actuating device of the geokhod. It was revealed that the value of the critical overturning torque of cutting forces is influenced by two force factors; this is the projection of the resistance of the soil to cutting on a plane perpendicular to the axis of rotation, as well as the total moment of resistance to cutting. As a result of the study, the critical values of the withdrawal force and overturning torque were obtained for specific mining conditions for the development and the specified geometric parameters of the actuating device of the geokhod. The resulting withdrawal force during the destruction of the face rock by the actuating device causes a deviation of the axis of geokhod rotation from the axis of the working’s route. Therefore, it becomes necessary to constantly monitor the deviation of the geokhod rotation axis from the axis of the working’s route, and, if necessary, to correct the geokhod displacement.

scholarly journals GEOLOGICAL INDUSTRIAL ASSESSMENT AND RANKING OF PROMISING OBJECTS OF THE DOMESTIC BASE OF RARE EARTH ELEMENTS

2021 ◽  
pp. 32-40
Author(s):  
V. Mykhailov ◽  
M. Kurilo ◽  
S. Kosharna
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Industrial Development ◽  
Raw Materials ◽  
Technological Development ◽  
Energy Transition ◽  
Green Energy ◽  
High Tech ◽  
Mining Operations ◽  
Field Development

Changes in the priority areas of financing in the field of subsurface use and their widespread reorientation to the search for alternative sources of raw materials which could ensure the development of modern high-tech industries are the promising direction for the country's growth in sustainable development conditions and Green Energy Transition. And at the moment the only resource that can ensure safe progress in the future and plays an important role in today's technological development is rare earth elements (REE). Within the framework of this study information on the current state of awareness about the REE mining prospects in Ukraine was analyzed and generalized; the systematization and updating of available data on quantitative and qualitative REE ore occurrences and deposits characteristics and their geological and industrial parameters was done; the main obstacles / barriers to the active mining development on these objects of potential extraction were identified. The obtained ranking results of domestic deposits and REE manifestations prove the expediency of investing in geological exploration and mining operations conducted in certain areas, which are identified as the most attractive for further industrial development and generally emphasize the prospects of the studied area and justify the need in intensification of selected rare earth objects field development.

scholarly journals Physical and mechanical properties of the rocks of the Starobinsky deposit forming the Third potash layer and its roof

2021 ◽  
Vol 65 (4) ◽  
pp. 484-494
Author(s):  
A. B. Petrovsky ◽  
V. Ya. Prushak ◽  
E. A. Lutovich
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Geological Structure ◽  
Mining Operations ◽  
The Third ◽  
Composition And Structure ◽  
Mining Conditions ◽  
The Stability ◽  
Roof Falling ◽  
Main Factor

The geological structure and the physical-mechanical properties of rocks composing and overlapping the Third potash formation in the areas of the mine field mine No. 4 JSC Belaruskali, which are scheduled to practice, are studied. The geological sections of the Third potash layer and its roof were built, the thickness of sylvinite and halite layers was measured, the roof falling of the rocks of the layer with a height of up to 20 m was assessed, and the type of immediate roof was determined by the composition and structure of its constituent rocks. It was established that the strength under uniaxial compression of both sylvinite and halite layers for the areas under consideration differs slightly. Therefore, to solve engineering problems of ensuring the stability of mine workings and to calculate fastening parameters, strength values averaged over the groups of layers can be used that correlate well with the percentage of weak and clay interlayers. The same applies to Poisson’s ratio, the values of which for various layers of formation are slightly different and can be taken by their averaging. It is shown that the main factor that negatively affects the strength of rocks occurring in the roof of the Third potash seam is the presence of weak and clay interlayers, which increases with depth. The introduction of the obtained results allows us to improve the calculation accuracy of securing mining parameters, to reduce the costs of their maintenance, and to improve the safety of mining operations in developing the Third potash formation in complex geological and mining conditions.

scholarly journals Innovative Technologies of Green Economy in Agriculture

2019 ◽  
Vol 12 (5) ◽  
pp. 90-100
Author(s):  
M. S. Oborin
Keyword(s):  
Agricultural Development ◽  
Sustainable Growth ◽  
Green Economy ◽  
Production Cycle ◽  
Industrial Complex ◽  
Innovative Technologies ◽  
Field Development ◽  
Key Factor ◽  
Complex Development ◽  
Environmental Measures

The subject of the research is “green” economy technology utilized in agriculture, as well as trends and prospect of their introduction in order to ensure sustainable development of the field. Acceleration in the rates of agriculture and agro industrial complex development is determined by the effectiveness of progressive industrial technologies adaptation, as well as by the forming of material and technical basis of machinery and equipment contributing to improvement and optimization of labour conditions, by stimulation of the processes of investing and innovating at every enterprise. Stable agriculture performance greatly influence food independence, economic self-dependency of the country regions, sustainable growth of the territories specializing in agriculture. Innovative technologies present a key factor for competitiveness and the field development as they facilitate cost reduction, increase in efficiency, they also stimulate the demand for the produce of well-known Russian companies’ brands. The security of production and administrative decisions influence the mentioned advantages as they facilitate environmental measures maintenance, population health and the quality of manufactured food. The purposes of the work is detection of perspective directions of agricultural development basing on the innovative “green” economy technology, and their adaptation in production cycle effectiveness assessment. The research methods are formal logical, analysis of the regional experience in utilization of secure technologies in agriculture, social economic processes modeling. It is concluded that adaptation of innovative technologies of “green” economy in agriculture must be executed on basis of state support mechanisms including attracting funds through “green” bonds, admittance to participating in special actions and R&D. 

scholarly journals Integrated development of iron ore deposits based on competitive underground geotechnologies

2021 ◽  
Vol 250 ◽  
pp. 569-577
Author(s):  
Vladimir Trushko ◽  
Olga Trushko
Keyword(s):  
Iron Ore ◽  
Strength Criterion ◽  
Field Studies ◽  
Ore Deposits ◽  
Iron Ores ◽  
Technological Parameters ◽  
Mining Operations ◽  
Geological Conditions ◽  
Complex Development ◽  
Analytical Review

The article presents an analytical review of the current state of the iron ore base of the ferrous metallurgy of Russia and the world, identifies the largest iron ore provinces and iron ore producers. The promising directions of development and improvement of the quality of the iron ore base of Russia and the features of the development of new deposits of rich iron ores are identified. Effective technologies for the development of rich iron ores deposits that ensure an increase in production volumes are proposed. The geomechanical justification of rational technological parameters that are easily adapted to changes in mining and geological conditions has been performed. Based on the results of field studies, the use of an elastic-plastic model with the Coulomb – Mohr strength criterion for modeling changes in the stress-strain state of an ore rock mass during mining operations is justified and recommendations for ensuring the stability of mine workings are developed. Effective engineering and technical solutions for the complex development and deep processing of rich iron ores with the production of fractionated sinter ore, which increases the efficiency of metallurgical processes, the production of high-grade iron oxide pigments and iron ore briquettes, which increase the competitiveness of iron ore companies and the full use of the resource potential of deposits, are presented.

Improvement of the Working Conditions of Oil Miners during the Transition from the Thermoshaft Method of High-Viscosity Oil Production to the Modular Mine Method of the Yaregskoye Field Development

2020 ◽  
pp. 58-65
Author(s):  
A.I. Fomin ◽  
◽  
T.V. Grunskoy ◽  
◽  
Keyword(s):  
Working Conditions ◽  
Occupational Diseases ◽  
Injury Rate ◽  
Oil Production ◽  
High Viscosity ◽  
Oil Field ◽  
Mining Operations ◽  
Field Development ◽  
Mine Workings ◽  
High Viscosity Oil

The need for high-viscosity oil production in the fields of the Russian Federation is substantiated. The technology of high-viscosity oil production by the thermoshaft method is considered, harmful and hazardous factors at the workplaces of the underground group workers are identified, first of all, the microclimate parameters (increased air temperature of the working area), which effect on the formation of occupational diseases and an increase in the risk of injury to the personnel. The main problems associated with the imperfection of the technology of the thermoshaft method for the extraction of high-viscosity oil, which effect on the safety of conducting operations for the extraction of heavy oil, are investigated, and presented. The options of opening up a high-viscosity oil field with a modular mine, which allows to normalize the thermal regime in mine workings, improve working conditions of the oil miners, reduce the level of occupational diseases and injury rate, reduce the volume of work and the costs of mining operations and maintenance of the mine workings, are considered. The system for the development of the Yaregskoye field of high-viscosity oil with the division of the mine field into separate production blocks using a sectional ventilation scheme, which provides for independent ventilation of each module due to the construction of an air supply and air exhaust shafts in each block-module of the mine is proposed in the article. The surface and underground complex of shafts for the construction of a modular mine is presented. The calculation is carried out and the results of technical solutions for airing various modifications of mini — mines are given. The drilling gallery was designed, which is typical for all the options of opening. In the designed modular mines, a closed oil gathering system is proposed. Comparative economic analysis showed the efficiency of the development of new areas of the Yaregskoye high-viscosity oil field using the construction of modular mines.

Engineering and Geocryological Conditions of the Elginsky Deposit

2021 ◽  
pp. 96-100
Author(s):  
D.V. Hosoev ◽  
S.V. Panishev ◽  
M.S. Maksimov
Keyword(s):  
Distribution Patterns ◽  
Practical Experience ◽  
Northwestern Part ◽  
Coal Field ◽  
Coal Deposit ◽  
Mining Operations ◽  
Glacial Sediments ◽  
Field Development ◽  
Development Technology ◽  
Software Distribution

The paper analyses engineering and geocryological conditions of the Elginsky coal deposit in terms of their impact on the development technology. Based on the analysis of the temperature and humidity conditions of rocks at the Elginsky deposit, it was established that the blasted rocks may re-freeze during the drilling and blasting stage, which is also confirmed by practical experience. Groundwater is present throughout the field, and the water content of the lower levels in the central part of the deposit may impede mining operations and require advance measures to lower the water table. Isomorphic maps of permafrost and glacial sediments in the northwestern part of the Elginsky coal field were created using the Mineframe software. Distribution patterns of these zones were established within the rock mass along the strike and in depth, which will make it possible to make reasonable adjustments to the field development technology.

Mining. A Millennium Long Road

2014 ◽  
Author(s):  
V.P. Nagornyi ◽  
◽  
V.M. Hloba ◽  
Keyword(s):  
Young People ◽  
Environmental Protection ◽  
Oil And Gas ◽  
Gas Production ◽  
Mining Science ◽  
Mining Operations ◽  
Oil And Gas Production ◽  
The Earth ◽  
Mining Methods

The question of structure of the Earth is stated. Minerals and their use are described. Information on the history and basics of mining, methods of mining, extraction of solid minerals, blasting technology, oil and gas production is presented. The issues of development of mining science and mining education, environmental protection during mining operations are considered. Mining themes in painting and art are reflected. An overview of the main directions of mining development in the XXI century is given. For the mass reader, especially young people who choose mining professions.

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