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Consideration of the issues of interaction of hydrogeological and geomechanical processes in mining development at water objects in difficult geological conditions is proposed. It is argued that the prediction of the interaction of these processes can be carried out on the basis of complementary deformation approach and the approach based on the theory of cracks. The issues in relation between the mining development and the negative impact on surface and underground waters as well on the safety and technology of p...

Regression analysis is one of the most used statistical methods, where it is necessary to determine the dependence of a certain quantitative (continuous) variable on one or more other quantitative (continuous) variables. The aim is to describe this dependence using calculations of given quantities. The paper aims to find the possibility of using this method in strategic management as a support tool. The research creates a tool in the MS Excel environment, which can find suitable dependencies according to defined p...

The vast territory of the Republic of Sakha (Yakutia), located in permafrost conditions and scattered by impassable roads, creates a serious problem in the energy supply of the population. In this regard, throughout the territory of the republic there are small open-pit mines with a production capacity of 40 to 200 thousand tons of coal per year to meet the needs of local consumers. The advantages of small open-pit mines are the low cost of coal mining, reduction of transport and transshipment costs, provision of ...

Unwanted effects of detonation of explosive materials (explosions) can occur due to deliberate actions (terrorist attack) or accidental. Modelling the effects of the explosion on the environment and the urban neighboring, occupies an important place in global and national research programs for the modernization of techniques for the safe use of explosives, in order to combat and operatively counter accidental explosions or those based on their use for terrorist purposes. The current trends are on the way to approx...

The dust cloud is the main form of existence of combustible dust in the production area and together with the existence of effective ignition sources are the main causes of dust explosions in production processes. Dust explosions are mainly characterized by the minimum ignition temperature, explosion limits, the minimum ignition energy, maximum explosion pressure and the rate of pressure rise. The explosive behavior which is represented by a mixture of air and flammable substance is influenced by many factors of w...

Taking into account the Regulation (EU) No 98/2013 of the European Parliament and of the Council of 15 January 2013 on the marketing and use of explosives precursors, which establishes harmonized rules concerning the making available, introduction, possession and use of substances or mixtures that could be misused for the illicit manufacture of explosives, with a view to limiting their availability to the general public, and ensuring the appropriate reporting of suspicious transactions throughout the supply chain,...

Dumping during open-pit mining is one of the important processes on which the area of disturbed lands and the environmental friendliness of the technology as a whole depend. In permafrost conditions, the issue of dumping requires a comprehensive study of the technology, dumping processes and taking into account the strength, thermophysical properties of frozen rocks. In most cases, when developing small coal deposits in the North-East of Russia, favorable mining and geological conditions of bedding are used for in...

Commonly the product’s life cycle ends up with waste. Conventionally the remains go to the landfill, earlier times – a dumpsite, the least manageable waste disposal method. To ensure that lost to society materials are treated with high priority, the European Union (EU) has implemented the Circular Economy Action Plan, continuing the monitoring of old dumpsites. The hierarchy of waste management points at preventing raw material use at first sight, but the following steps point at material reuse and recycling. The ...

The nature of their work places intervention and rescue personnel at the top of professions that face a considerable number of occupational health and safety risks, which are sometimes unavoidable. Often, this occupational category does not face a single safety risk, but a complex combination of risk factors, including unpredictability of situations in which they are required to work. The growing issue of protecting emergency workers against occupational health and safety risks has been highlighted as a priority b...

The use of indicator methods in oil and gas field geology allows us to obtain representative quantitative information about the direction and velocity of fluid movement in the studied formations, to assess the main filtration parameters and the presence of inter-reservoir flows, as well as reliable information about the technical condition of wells. The use of indicators (tracers) is based on the injection of water (or an aqueous solution of the reagent) labeled with a stable or radioactive indicator and subsequen...

In Oituz and Targu Ocna, the attestation of salt extraction was established during the Geto-Dacian period. The oldest written testimony dates from 1380. The mining works that serve the Trotus mine within the Tg. Ocna Salt Mine, are located in the Fetele Targului salt massif located near the town of Tg. Ocna, on the left side of the Trotus river. Currently, the Trotu? Salt Mine has 14 horizons: 2 at the Pilot mine and 12 at the Trotu? mine. The specialized 3D CANVENT program was used to establish the optimal distri...

Usually, only a part of the work capacity is spent in the professional activity, being materialized as products and services made/accomplished within the work process. However, there are also instances, in extreme cases, when total work capacity needs to be engaged, thus an important body reserve being used. Work capacity is represented by the totality of an individual’s (physical, mental, intellectual) possibilities to perform a useful activity at an optimal level of intensity and efficiency. One of the most impo...

In the paper the authors present the study results of rock massif fracture based on the case study of a rockburst hazardous Khibiny deposit. The authors have revealed peculiarities in seismic process at different mining stages over a five-year period. The principal aim was to study the particularities of seismicity occurrence when the deposit is mined by approaching fronts, namely, in the periods between bulk blasts in the docking sections between them. The authors have proposed an approach to reveal the features ...

The purpose of the research was to develop an algorithm for a comprehensive assessment of the sustainable development of a mining enterprise based on an integral indicator from the standpoint of environmental performance and test it on the example of the largest Russian coal and energy company SUEK. In modern conditions the Russian energy sector is in a state of transformation, which is associated with the strengthening of globalization processes, tougher competitiveness and management of production systems. Moreo...

Unlike friable rocks, salt behaves pseudoplastic when blasted, which leads to other premises of the blasting technique compared to those applied for stratified sedimentary or eruptive rocks. Here can also add the salt inhibitory character on the thermodynamic parameters of the explosions, with effects on their efficiencies as well as some particularities of the execution of the blasting works due to the presence of methane gas in the salt mines. The article presents the results of the research carried out in fired...

Belt conveyors constitute an important part of the machinery for the underground and surface mining of materials. In the course of time, conveyor belts proved to be the most efficient way of transporting material, which is still valid not only in the mining industry. For the transport of rocks to a mine disposal site, a combination of multiple belt conveyors is necessary. Places of transfer belong to the most stressed parts and there are frequent breakdowns. They operate in difficult conditions and are subject to ...

In the paperwork are presented aspects regarding uncertainty involved in the process of spark ignition assessment for intrinsically safe equipment. In the first part of the paper was presented the explosion risk. In the field of power generation and also, in a lot of other fields of industrial activities, the occurrence of flammable substances is a common fact. As a consequence, an explosion risk can occur. On the other hand, the installations placed in areas endangered by presence of flammable substances should b...

The basic requirement placed on any machine system, technology and machine as a whole must be clearly based on the assurance of safe operation and operational reliability, and this is where maintenance is the systematic tool to achieve them. Technical diagnostics is a part of every maintenance and thus becomes one of the decisive maintenance tools in its comprehensive concept. Much attention is now being paid to lignite mining in the Czech Republic, especially when we are talking about the extraction of coal for i...

Considering that the underground mining of coal is used mining systems that have a high degree of complexity, and can reach cumulative lengths of tens of kilometers, associated with them we have the ventilation networks with the role of transporting important air flows with the help of special ventilation systems. The aeration networks are made up of all the mining works on which air flows are carried. Structurally, they comprise nodes and branches. The nodes of an aeration network are generated by the intersectio...

Anthropic activities involve the extraction of the transformation and use of natural resources. During the process of extraction at the surface or underground of useful minerals, particles or gases resulting from the natural rocking or release from the rock mass appear in the working environment. The process of transforming useful mineral substances is carried out on the surface in enclosed enclosures, involving the use of complex technological processes. During the course of these technological processes, explosi...

This paper describes the tools developed for modelling mine-ventilation networks and postprocessing simulation results using the Aeroset software, with a specific focus on solution visualization tools. These tools are aimed at simplifying the analysis of simulation data of large ventilation networks ? the visual representation and graphical analysis of models of such ventilation networks, with many (more than 1000) branches, becomes difficult without the use of specific tools. The following special tools are sugge...

Stress agents are only potentially stressful, generating psychological stress only under certain conditions, even if some of them are able of generating stress reactions in most individuals. Therefore, effects of stressors depend not only on their own characteristics but also on attributes of the subject receiving their action such as quality and breadth of emotional responses, adaptive strategies available and mobilized in the created interaction etc. Specific responses to a situation that potentially endangers l...

This paper responds to published scientific papers which compile econometric models of extraction of selected mineral resources. Mining prediction models can be new tools to increase the competitiveness of mining enterprises. Comparing the results of mining prediction and real data is important for further research on the issue. Specification of the results will lead to better managerial decisions in strategic and operational management. The results of the paper can lead to the clarification of the so-called rando...

The main aim of this paper is the description of experimental operation of new bucket in real conditions of the open pit mine and the evaluation of surface temperature increasing in the case of new bucket application. The experiment was realised in two excavators KU 300 operated in the same mining conditions. The target of this experiment is the bucket surface temperature increasing evaluation and the verification of new bucket tooth geometry with tooth ESCO U35T possibilities in comparison with original variety. ...

The analysis of development systems used in mining in coal pits of the permafrost zone is carried out. The intensive development of deposits over the past decades has led to large-scale landscape disturbances, the reasons for which are a significant increase in the scale of open pit mining, surface disruption by mining, dumps, technological sites, hydraulic structures, as well as environmental pollution for a long period. Attempts to reduce landscape disturbances using land-saving technologies, systematizing trans...

The activity of evaluation and verification of industrial ventilation installations has a strong preventive role in terms of explosion risk mainly due to the fact that of the three determining elements that can lead to an explosion phenomenon, ventilation installations can determine the presence of two elements namely the presence of fuel (gases, vapors, dusts, mists) and the source of initiation (hot surface, flame, sparks of mechanical origin, electrical sparks, static electricity, etc.). The development of expe...

In the case of process of mining of mineral resources as disintegration of variety of materials is always crucial to choose optimal technology to prevent wastes in energy, human resources and also financial resources. It is also essential to avoid negative impacts on the nature and prevent serious damages in environment in general. This article is focusing mainly on the various ways of mechanical disintegration of materials without usage of blasting in the mining condition (surface mines, coal mines, tunnel boring...

Classic belt conveyors are designed primarily for continuous, straight transport of almost all bulk materials on short, medium and long lines. They are characterized by high transport performance. Their disadvantage is that the material can be transported in ascending order with a maximum ascent of + 18 ° and drop-down to -12 °. Another disadvantage is the need for overflows in the event of a change in the direction of material transport and pollution of the living and working environment due to the trough shape o...

This research describes such a problem as increasing the productivity of wells and the oil recovery coefficient by conducting various geological and technical measures, which based on correlation, regression, and statistical analyzes. These methods allow to analyse a possible interconnection of two or more numbers of indicators, also identifying the problematic well stock, and selecting a set of measures aimed at improving the efficiency of field development, including various geological and technical measures. Ex...

The present article deals with the issues regarding the impact process at the impact of the material onto an enclosed conveyor belt supported by an impact bed consisting of impact rods at the feeding site. The theory of the impact process is based on the following preconditions: the whole impact process and the related processes are only performed at the impact site; the rock block is of relatively small dimensions compared to the conveyor dimensions; the impact bed is absolutely rigid; the conveyor belt is absolu...

The scope of this research is to present and discuss information for ?Ada Tepe? open pit gold mine geological section within ?Khan Krum? gold mine deposit in South-Eastern Bulgaria. The mine is located near to Krumovgrad, approximately three kilometers south of the town, at Ada Tepe hill. The deposit is designed to extract 850,000 tons of gold ore per year over an eight-year period. Conventional open pit mining methods are planned to use for gold mining. The gold ore is currently processed in dressing plant, invol...

The need to take into account the temperature regime as one of the main factors determining the stability of natural and artificial slopes in the permafrost zone is caused by the dependence of the strength properties of rocks on their temperature. In the frozen state, almost all rocks have a high bearing capacity, providing the ability to select effective open-cast mining parameters based on technological requirements. Mining operations violate the thermal regime of rocks in the instrument part of the quarries. As...

Explosions caused by accidents or deliberate actions can seriously damage the structural/non-structural elements of a building and endanger the life of occupants. If the explosion occurs at a short distance, structural elements in close proximity may be seriously damaged or even completely removed. Under certain conditions, these local damages spread into the structure and can generate generalized collapse (also called progressive collapse). Progressive collapse, which in many cases causes more victims than the ov...

Ensuring the stability of underground construction remains a challenge in terms of coal mining. The implementation of effective coal mining technology facilitates high rates of operations and simultaneous exposure of large-scale rocks. This problem is relevant both for Ukraine, where underground coal mining is the main one and for Kazakhstan, where the transition to combined open-underground mining is also underway. Supporting the mined-out space under complicated geological conditions requires an in-depth analysi...

The purpose of this paper is to determine the rate of methane (explosive gas ) and of carbon dioxide (axphysants gas ) in the mine workings of Praid salt mine. Currently in Romania there are six salt mines which exploit the salt through underground mine workings: Praid salt mine, Tg. Ocna salt mine, Slanic Prahova salt mine, Ocnele Mari salt mine, Cacica salt mine, and Dej salt mine. Of these six, in three salt mines occurred gas and salt eruptions: Praid salt mine, Slanic Prahova salt mine and Tg. Ocna salt mine....

The decisive factor in the process of technical inspection of the gas bottles is determined by the correct choice of the method of carrying out the inspections in order to observe with the greatest attention the possible imperfections due to the wear, which have occurred after prolonged use. Emphasis is placed on the safety conditions of the gas bottles, which contain mandatory minimum technical provisions regarding the periodic verification of the cylinders for liquefied gases or compressed under pressure. The ga...

The article describes the underground mining of compact ore bodies by inclined layer panels. (each sequentially developed bottom-up by means of inclined blind drifts). Compact ore bodies are opened by an inclined shaft equipped with a special hydraulic pipelines for delivery of fine-grained rock mass to the surface. In this case, the inclined shaft path, depending on the shape of the ore body, can pass from below the ore body, above it, or diagonally near its lateral surface. Directly from the side wall of the tru...

Today, there are high demands for ecological solutions to the problems associated with all human activities, and therefore there is great pressure on surface mines to contribute to the reduction of dust and noise in the extraction of raw materials. Under this pressure, the mining company is trying to find a solution that would benefit all parties - ecologically and economically. The noise level of belt traffic in surface quarries, especially at night, exceeds 60 dB, which significantly disrupts the surrounding pop...

The expense of restoring of excavators cutting bodies is increasing these days in the Most Basin area, primarily the replacement of tooth because of abrasion expense. The main reason is the complicated geological situation of overburden rocks, first of all the occurrence of sands and hard structures in the overburden cuts rocks in the deep horizons of open pit mines. The main target of this article is the brief description of realised research. It is design of the optimum methodology of bucket tooth cutting body h...

In Romania, the production of coal and lignite depends on the national demand for primary energy resources in the electricity production sector and on the available resources / reserves. Although it still plays an important role in the mix of electricity production and the safety of the National Energy System, especially in the winter, coal-fired electricity production is decreasing even this season. The considerations for which this situation was reached are: the programs for extractive industry reorganization an...

Regression analysis is widely used in situations where it is necessary to determine the dependence of a certain quantitative (continuous) variable on one or more other quantitative (continuous) variables, so-called regressors. It is necessary to determine in advance which variable is independent (explanatory) and which is dependent (explained). The aim of the regression analysis is to describe this dependence using a suitable mathematical-statistical model. The presented paper aims to find the possibilities of usi...

The Brown Coal Research Institute started the solving of the research project based on the optimisation of the shape and material of ground and mining machines in 2018. This research is necessary for increasing of efficiency of mining process in conditions of the Most Basin. The very important part of the research was the geological characteristic of the Most Basin main mining localities. Evaluation of the geological situation of the Bilina, Vrsany and Libous mines (mining of the overburden rocks in the CSA mine f...

The studies were performed using risk management tools during the operation of combined types of transport in open pit mining [1-5]. The goal is timely and efficient risks management during the rock mass transportation. The risks in study were identified while using combined types of transport at the open pit mining facilities [6]. Qualitative and quantitative risk analyses were carried out for their further effective management and monitoring. Information on the identification, classification, qualitative and qua...

A ventilation system is defined by performing air exchanges between the indoor and outdoor environment with the purpose of creating environmental conditions as close to the required thermal comfort conditions. Before installing a fan, it is necessary to analyze the space in which it is to be used and the method of compensating the exhaust air (mechanically with another fan or naturally with dimensioned grids). The most important factors to consider when choosing a fan are: the volume of the space, the number of sh...

Conveyor belts are used for a long period of time in the industry branches where potentially explosive atmospheres could occur. The use of conveyor belts in industrial spaces with danger of explosive atmospheres, implies fulfilling by these of certain safety requirements, in order to prevent the ignition sources of explosive atmospheres. The need to provide the highest level of protection in the industrial spaces with danger of explosive atmospheres led, on the one hand, to the use of conveyor belts with adequate ...

The article focuses on studying new Baltic amber processing technologies. This topic is relevant primarily for regions where amber is being mined commercially, including for the Kaliningrad region of Russia, where the largest industrial amber deposit in the world is located, developed by one enterprise ? the Kaliningrad Amber Factory. Having a specific production structure with a large share of amber for pressing and amber for chemical processing against the background of increasing amber production, the Kaliningr...

The dynamic impact loading has significant influence on the conveyor belts operation time. This paper focuses on the tensile properties of fabric conveyor belts subjected to the impact loading induced by dropping a hammer. The induced damage of the conveyor belt was inspected after the drop. The impact of the hammer simulated the belt stress at the chutes where the transported material falls onto the belt. The falling material usually damages the belt on its surface, i.e. the rubber cover layer that protects the b...

BelAZ-7540 quarry dump trucks are widely used in the development of placer deposits in the Arctic zone of Russia. The efficiency of the mining enterprise depends by their reliability. As practice shows, the operation of mining machines in the Arctic North has specific features, which are a large distance from industrial and energy centers, the lack of year-round road connections, low climatic temperatures and seasonal character of mining. The operational reliability of BelAZ-7540 quarry trucks is not sufficiently ...

The gradual deepening of deposits development and long-term exploitation of open geotechnology elements, buildings and the industrial site facilities (control objects) of large mining enterprises result in paying considerable attention to the creation of integrated monitoring systems to control their stability (hereinafter referred to as the System). The article presents the basic principles of organizing the System using the example of Kovdorsky GOK JSC. The formation of the Zhelezny main open pit to a depth of 8...

The paper presents the results of geomechanical research of the state of mine workings located in the bearing pressure zone at a rockburst hazardous deposit. The aim of the research is substantiation of the measures to protect the mine workings from the impact of high tectonic stresses. The stress-strain state calculations were carried out by the finite element method in volumetric setting. Numerical models have been developed on the basis of in-situ measurements data of stress field parameters. The stress-relief ...