scholarly journals EXPERIENCE IN REINFORCEMENT OF UNDERGROUND MINE SUPPORT WITH THE AK01-21H INTRACTABLE ROPE BOLTS IN COMPLEX MINING AND GEOLOGICAL CONDITIONS

Ugol ◽  
2021 ◽  
pp. 11-13
Author(s):  
A.A. Dudin ◽  
◽  
N.A. Efimushkin ◽  
A.S. Sokolov ◽  
A.A. Pundel ◽  
...  
Keyword(s):  
Underground Mine ◽  
Mine Support ◽  
Geological Conditions

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”.

An expert technique for optimization of underground mine support system

2014 ◽  
pp. 561-565
Author(s):  
Sudhir Kashyap ◽  
Md Tanweer ◽  
Amalendu Sinha ◽  
Dayal Parhi
Keyword(s):  
Support System ◽  
Underground Mine ◽  
Mine Support

scholarly journals JUSTIFICATION OF MANAGEMENT SOLUTIONS FOR THE DELIVERY OF DIESEL FUEL TO THE MINES

MEST Journal ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 157-165
Author(s):  
Vladimir Olizarenko ◽  
Azamat Allaberdin ◽  
Konstantin Vazhdaev
Keyword(s):  
Diesel Fuel ◽  
Southern Urals ◽  
Underground Mine ◽  
Technological Scheme ◽  
Optimal Model ◽  
The Southern Urals ◽  
Organization And Management ◽  
Geological Conditions ◽  
Rational Organization ◽  
Reasonable Choice

The development of copper-pyrite deposits in the southern Urals is characterized by an increase in depth and, consequently, a complication of mining and geological conditions. As a result, there is a significant increase in the volume of work on the sinking of mine workings, delivery, and rollback of the extracted ore mass. Justification of management decisions on the delivery of diesel fuel to the mine is executed to find the optimal model of the technological scheme of delivery of diesel fuel (diesel fuel) and other fuels and lubricants (further – fuels and lubricants) in the deep horizons of the underground mine (in the sequel - in the mine) with the development of recommendations on designing an optimal model of method of delivery. The latter is achieved by comparing the competitive models of delivery of DT to the mine: fuel tankers (hereinafter-TK) on an inclined ramp, through a pipeline laid in a cased well and in specially equipped mine trolleys and their combinations with a reasonable choice of the optimal model of the technological scheme. According to the results of the research developed methods of rational organization and management of the movement of diesel fuel based on material flows on the principles of logistics concepts, ensuring the formation of counter-flows model logistic schemes. From the above studies, it follows that the delivery of DT to the mine in special trolleys is optimal with minimal time and cost of delivery to deep horizons Gaiskiy underground mine.

scholarly journals FEATURES OF STRESS-STRAIN STATE OF MINE SUPPORT WHEN FILLING ROCK FALLS WITH PHENOLIC RESINS

2021 ◽  
Vol 2 (3) ◽  
pp. 266-273
Author(s):  
Andrey A. Krasnovsky
Keyword(s):  
Strain State ◽  
Rock Falls ◽  
Stress Strain ◽  
Phenolic Resins ◽  
Various Boundary Conditions ◽  
Stress Strain State ◽  
Mine Support ◽  
Geological Conditions ◽  
Calculation Results ◽  
Distribution Of Stress

The problem of finding the stress-strain state of the mine support and surrounding rocks when filling the voids with phenolic resins has been formulated and its mathematical modeling has been carried out. The pattern of distribution of stress fields in mine support and rock mass and their change depending on the geometric dimensions of the area filled with phenolic resins have been determined under various boundary conditions. It is shown that the use of phenol resins contributes to an increase in mine support stability, which allows using the developed technology for the elimination of rock caving in different mining and geological conditions. The calculation results have been discussed.

Engineering-Geological Studies Of The Territory, Soils Of Foundation And Foundations Of The Architectural Monument Of The "Melnikov’s House" In Moscow

2019 ◽  
pp. 41-51
Keyword(s):  
Working Condition ◽  
Overlying Water ◽  
North East ◽  
The North ◽  
Geological Processes ◽  
Architectural Monument ◽  
Geological Conditions ◽  
Zone Of Influence ◽  
Complex Engineering ◽  
Building Engineering

On the basis of engineering and design surveys of the building, engineering-geological and geophysical studies of the soils of the territory conducted by the article authors, as well as with due regard for the results of studies conducted on this territory by other authors, the features of the foundations, soils of their foundation and engineering-geological conditions of the territory of the Melnikov House are established. It is shown that the Melnikov house is located under complex engineering-geological conditions on the territory of high geological risk, in the zone of influence of tectonic disturbance. To the North of the area there is a zone of intersection of the observed disturbance with a larger disturbance that can have an impact on geological processes. To the North-East of the site of the Melnikov House, a sharp immersion of the roof of carbon deposits was revealed. It promotes groundwater seepage into limestone of the carbonate strata from overlying water-bearing sands and activation of processes of suffusion removal and sinkhole phenomena of the soil. The surveyed area is assessed as potentially karst-hazardous and adjacent to it from the North-East territory as karst-dangerous. In this regard any construction on the adjacent territory can provoke activation of sinkhole phenomena on the surface. The foundations of the building are basically in working condition. Existing defects can be eliminated during repair. The foundation soils mainly have sufficient bearing capacity. Areas of the base with bulk soil can be reinforced. However, when developing a project for the reconstruction of the building and its territory, it should be taken into account that the design of the Melnikov House does not provide for its operation on the loads at the formation of sinkholes.

DEVELOPMENT OF ALGORITHM PROCEDURE OF STRATEGY DECISION-MAKING IN A CEMENT INDUSTRY ENTERPRISES

2019 ◽  
Vol 6 (4) ◽  
pp. 60-65
Author(s):  
Elena Vyacheslavovna Zaytseva
Keyword(s):  
Decision Making ◽  
Integrated Assessment ◽  
Information Technologies ◽  
Practical Implication ◽  
Cement Industry ◽  
Survey Method ◽  
Innovative Strategy ◽  
Technological Readiness ◽  
Geological Conditions ◽  
Methodological Principles

The problem statement (relevance). The article illustrates the outcome of analytical research in the area of substantiation of organizational and managerial structures of cement companies on the basis of conducting an integral estimation of complex conditions of operation (manufacturability of mining and geological conditions of cement production, level of production and technical conditions and social conditions) and outputs (production and technical level and financial level). Integrated assessment is provided by the appropriate methodology, the purpose of which supports an increase in the objectivity, reliability and reliability of decisions in the development of technological systems of cement enterprises.Purpose: development of an enlarged flowchart of the decision-making procedure algorithm for development strategies for cement enterprises. Methods used: the work used the method of “vector norm”, based on the methodological principles of the theory of complex decision making, utility theory, game theory, qualimetry, expert survey method and other generally accepted methods and principles.Novelty. The elements of novelty include an improved method of integrated assessment of the technological structure of cement enterprises in the conditions of external and internal environments of operation.Result. The article presents an iterative algorithm and decision-making procedure for structurally selected groups of cement enterprises with the choice of a specific form of their development. The results of the work made it possible to form the key areas of training and a list of information technologies that ensure technological readiness for the implementation of the directions of digitalization in relation to cement enterprises.Practical significance: the organizational and management apparatus with the appropriate mathematical reinforcement for the selection and justification of strategies for the development of cement enterprises. The practical implication of the outcome of the study due to the possibility to increase the effectiveness of organizational-technological and managerial solutions based on the developed methodology, technique and algorithm of formation of innovative strategy of development of the mining enterprises of the cement industry. The main provisions of the work are used in the holding “EUROCEMENT” in the development and implementation of plans for the development of industrial production in the short and long term.

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