scholarly journals Determination of stresses in concrete lining with rock-bolt in case of exhaustion of rock-bolt supporting strength

2019 ◽  
Vol 265 ◽  
pp. 05034
Author(s):  
Marianna Pleshko ◽  
Ivan Shornikov
Keyword(s):  
Elasticity Theory ◽  
Rock Bolt ◽  
Concrete Lining ◽  
Analytical Problem ◽  
Preliminary Calculation ◽  
Mining Operations ◽  
Axisymmetric Elasticity

The article deals with the solution of analytical problem of flat axisymmetric elasticity theory, when rock-bolt supporting strength is exhausted. Expression for determination of stresses in concrete lining is deduced, where pressure increasing at exploitation have regarded. This methodology can be used at blueprint stage and preliminary calculation during mining operations. Further evaluation of concrete lining strength and geophysical probe of rock is needed for the preliminary calculation.

scholarly journals Determination of the Criminal Offense Elements in the Safety Rules Violation during Mining Operations

2019 ◽  
Vol 105 ◽  
pp. 02012 ◽  
Author(s):  
Olga Safargalieva ◽  
Oleg Sergeev ◽  
Yuriy Volgin ◽  
Marina Agienko
Keyword(s):  
Systematic Approach ◽  
Basic Element ◽  
Mining Operations ◽  
Criminal Offense ◽  
Official Position ◽  
Initial Stage ◽  
The Subject ◽  
Safety Rules

In the article, from the standpoint of a systematic approach, the forensic characterization of safety rules criminal violations during mining operations is analyzed. That is the basic element which determines the content and algorithm of uncovering of crimes, the investigation and trial of a criminal case. The subject (the identity of offender) is its central, basic element. It is noted that the element of subject (the identity of offender) is the most informative when investigating criminal violations of safety rules during mining operations. It is based on his study in the unity and interrelation of the following aspects: official position, social and psychological properties and personality traits and victimization behavior of the criminal offence victims and third parties. The situation of a crime (the second element of forensic characterization) is structured according to the circumstances that characterize pre-, criminal, and post-criminal state of outward things; three interrelated and interdependent are pointed out. The complex combination of the levels and edges of each selected elements of a cognizable object, due to the specifics of the crime in question, also determines the peculiarities of investigative actions and search activities at the initial stage of the investigation of safety rules criminal violations during mining operations. The article proposes recommendations to overcome the objective difficulties encountered in the investigation of criminal violations of safety rules during mining operations.

Determination of eigenvalues and discontinuous eigenfunctions of the system of equations of elasticity theory

1994 ◽  
Vol 72 (2) ◽  
pp. 2998-3003
Author(s):  
V. V. Skopetskii ◽  
V. S. Deineka ◽  
O. A. Marchenko
Keyword(s):  
Elasticity Theory ◽  
System Of Equations

scholarly journals Application of MCDA in the determination of optimal block size for open-pit modelling and mine planning

2021 ◽  
pp. 67-85
Author(s):  
Petar Marković ◽  
Dejan Stevanović ◽  
Milica Pešić-Georgiadis ◽  
Mirjana Banković
Keyword(s):  
Optimal Solution ◽  
Block Size ◽  
Mine Planning ◽  
Open Pit ◽  
Affecting Factors ◽  
Mining Operations ◽  
Advantages And Disadvantages ◽  
Mining Project ◽  
Modelling Process

The process of creating a geological block model as the basis for a further detailed design and planning of mining operations is a very responsible task. Errors made during this initial process are transferred to all other phases of the mining project. Certainly, one of the most important decisions for the modelling process is the choice of the appropriate size of the blocks that form the model itself. The determination of the optimal block size is not a simple process, because it depends on a large number of affecting factors and criteria. This process can be significantly facilitated by the application of multi-criteria analysis methods, which enable establishment of interdependence between the criteria in order to select the optimal solution. This paper presents the possibilities of applying the Analytical Hierarchical Process (AHP) method for selecting the optimal block size for the needs of the coal deposit modelling process and mine planning, as well as the way in which this method can significantly facilitate problem solving, by looking at it from several aspects. The analysis included six criteria and four potential solutions, and the results themselves indicated the advantages and disadvantages of the applied method.

scholarly journals DETERMINATION OF STRUCTURAL ELEMENTS INTENDED TO RESISTANCE AGAINST EARTQUAKE AND RENEWABLE ENERGY USAGE

2015 ◽  
Vol 1 (2) ◽  
pp. 85-90
Author(s):  
Poyraz Kağan ◽  
František Kulhánek
Keyword(s):  
Renewable Energy ◽  
Renewable Energy Sources ◽  
Working Environment ◽  
Seismic Zone ◽  
Structural Elements ◽  
Energy Usage ◽  
Preliminary Calculation ◽  
Innovative Solutions ◽  
High Level

The primary aim of office buildings is to provide a working environment with innovative solutions for the inclusion of needs of all positions including administrative and managerial workers. While offices can be appearing in almost any building; requirements complicate the construction. These requirements can be due to legal regulations, and technical needs. This study focuses on combined solutions via determination and preliminary calculation of structural components intended to resistance against earthquake and usage of possible renewable energy sources. The project building consists of 10 floors by way of application of reinforced concrete in conjunction with convenient application of heating, ventilating, and air conditioning (HVAC) systems, PV installation, high level of solar gain and interchangeable design. Static calculations are based on Turkish standards as Turkey is located over large seismic zone.

scholarly journals Determination of the Artificial Filtering Massif Location for Purification Quarry Wastewaters of Kamyshansky Open Pit Mine

2019 ◽  
Vol 105 ◽  
pp. 02022 ◽  
Author(s):  
Maxim Tyulenev ◽  
Sergey Markov ◽  
Eugene Makridin ◽  
Yury Lesin ◽  
Vyacheslav Gogolin
Keyword(s):  
Water Purification ◽  
Wastewater Treatment Plants ◽  
Water Discharge ◽  
Coal Industry ◽  
Open Pit ◽  
Mining Operations ◽  
Purification Methods ◽  
Settling Ponds ◽  
Overburden Dumps

The most common purification methods in the coal industry are settling ponds and filtering treatment constructions. But in some cases, the use of traditional methods and schemes of water purification is complicated by the conditions of water discharge or does not provide the required water quality. For example, sharp seasonal fluctuations in the level of discharge and water pollution, a large number of spillways distant from each other and a change in their location during the development and moving of mining operations often make it difficult to use expensive and difficult to operate industrial wastewater treatment plants. Often, mining enterprises have a shortage of land areas to place such plants. In this regard, studies have been conducted aimed at identifying the possibility of water purification from suspended solids by filtering in arrays of coarse rock and semi-rock. Such arrays included, first of all, overburden dumps, various technological dams and embankments, as well as specially constructed filter arrays from mining waste. This article presents the results of studies to determine the location of the filter massif in the open pit “Kamyshansky”.

TECHNOLOGY OF FORMATION MAN-MADE DEPOSITS AND DETERMINATION OF LOSS IN MINING OPERATIONS USING WALKING EXCAVATOR

2018 ◽  
Vol 5 ◽  
pp. 35-42
Author(s):  
K.R. Argimbaev ◽  
◽  
D.N. Ligotskiy ◽  
M.O. Bovduy ◽  
K.V. Mironova ◽  
...  
Keyword(s):  
Mining Operations

INFLUENCE OF ANALYSIS RESULTS OF ANALYTICAL COAL SAMPLES ON THE PREDICTION ACCURACY OF HAZARDOUS PROPERTIES OF COAL SEAMS

2021 ◽  
pp. 176-186
Author(s):  
Yevhen Rudniev ◽  
◽  
Vyacheslav Galchenko ◽  
Elvira Filatieva ◽  
Mykhailo Filatiev ◽  
...  
Keyword(s):  
Coal Mine ◽  
Calorific Value ◽  
Mining Area ◽  
The State ◽  
Coal Seams ◽  
Initial State ◽  
Mining Operations ◽  
Mineral Components ◽  
Scientific Substantiation

Purpose: to establish possible quantitative errors in determining the values of some indicators of the degree of metamorphism without attracting the content of total moisture and mineral impurities to predict the hazardous properties of coal mine layers during mining. Methodology: based on the use of initial data on the quality indicators and properties of coals for specific coal seams, given in the reference sources, with the subsequent recalculation of the state of samples from their dry ashless or ashless state to the raw state. Comparison of the samples of indicators were determined, respectively, using analytical samples and based on the results of recalculation to the initial state (close to the production state), conclusions were drawn about possible errors in the case of using the analysis results of the analytical samples to predict hazardous properties of mines. Results: The analytical state of the samples for dry ashless state (daf) or wet ashless state (af) does not correspond to the state of coal in the working area of mining operations (r), which most accurately characterizes the manifestation of mine hazardous properties. The indicators of the release of volatile substances during thermal decomposition of coals, which are used to predict the hazardous properties of mine coal seams, do not directly reflect changes in the elemental composition of coals during metamorphic transformations. Methods for preparing analytical samples provide for grinding to small fractions, removing external moisture and enriching to ash content less than 10%, which does not correspond to the state of coal (r) in the mining area. The use of indicators set for dry ashless combustible (organic) mass excludes the possibility of analyzing the influence of moisture and mineral impurities on the manifestation of the hazardous properties of coal seams. The use of such indicators to predict the hazardous properties of mine coal seams can lead to errors in their determination of 45 ÷ 50%. The hazardous properties of coal seams can be adequately characterized only by the combined composition and properties of organic matter and mineral impurities in a state close to the presence of coal in the mining area. Using the example of possible significant errors in the calorific value, in the case of its use to characterize the hazardous properties of coal mine seams, the expediency of scientific substantiation of a set of indicators for a reliable forecast of a specific hazardous property for a specific seam formation was proved. Scientific novelty: hazardous properties of coal seams are reliably predicted on the basis of the composition and properties of organic and mineral components, reduced to conditions close to the state during mining operations. Practical value: the results obtained give grounds to scientifically substantiate the selection of the necessary indicators for predicting a specific hazardous property of coal seams and make proposals for improving the regulatory framework for the safe conduct of mining operations.

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