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ISSN - 2391-9361


Volume 8, issue 1




Edition circulation: 130 copies






vol. 8, iss. 1/1


Michalene GREBSKI, Radosław WOLNIAK, Wes GREBSKI

New immigration in the north-eastern part of Pensylwania. Chances and treats


Abstract: The article analyzes the opportunities and threats resulting from immigration based on experience from the north-eastern part of Pennsylvania. It also analyzes the needs of immigrants and methods of their integration with the local society. Analyzes presented in the publication show that immigration is a natural phenomenon important for the further growth of the economy in a given country. Problems in many cases result from a lack of understanding of its meaning, which leads to aversion and fear of the unknown.


Key words: immigration, integration of immigrants, immigration problem, multiculturalism, multinationality

str. 9



vol. 8, iss. 1/2


Michalene GREBSKI, Radosław WOLNIAK

Programs of retraining workforce in the USA


Abstract: The aim of the paper is to analyze the methods used to retrain unemployed workers in the US in order to make possible their return to the labor market. It is necessary to ensure the proper functioning of the economy of the country. The article also analyzes methods of predicting employment in individual occupations over the next 10 years, and methods of training employees for future professions. The article also examines the retraining program for veterans in order to find a suitable place for them in the economy and civil life.


Key words: unemployed employees, retraining of employees, anticipation of employment, employment of veterans, management, workforce, human resources management

str. 17



vol. 8, iss. 1/3



Supervision and procedures regulating the mining industry in Canada


Abstract: Article describes the legal system regulating the mining industry in Canada as well as the role of government agencies in developing and updating mining safety regulations. The paper also focuses on the procedure of overseeing new mining projects from the perspective of safety as well as protecting the environment. The organizational structures of government agencies supervising the mining industry in Canada are described in detail.


Key words: mining supervision, mining regulations, mining safety, supervising agencies, occupational safety

str. 25



vol. 8, iss. 1/4



Cooperation between university and industry: funding methods and implementation of scientific and research projects in the Poland and USA


Abstract: The goal of the article was to describe the methods of financing research and development activities in Poland and United States. The funding of cooperation between academia and industry is needed for continuing development of the knowledge-based economy. The USA is one of the world leaders in the cooperation between a university and industry. The article also describes the involvement and role of all cooperating partners in creating an effective innovativeness network in the Poland and USA. The paper also includes an analysis of the financial resources available for research and development project in the USA and Poland. The article described is library research. Based on an analysis of research and development projects in both countries, the article offers some ideas for improvement in the better utilization of the potential of academic institutions to meet the research and development goals of the knowledge-based economy.


Key words: university-industry cooperation, promoting innovativeness, financing research projects

str. 35



vol. 8, iss. 1/5



General Data Protection Regulation – EU regulation as a challenge for entrepreneurs


Abstract: The article presents Controller’s most important tasks, which have to be fulfilled to meet the requirements of General Data Protection Regulation. Described guidelines are recommended in the process of implementing the EU regulation. Attention is paid to the problem of cross-border data transfer to third countries and the challenges that the Controller faces in this regard.


Key words: controller, data protection officer, information obligations, consent, data subject, profiling, data breach, third country, President of the Personal Character Data Protection

str. 51



vol. 8, iss. 1/6


Antoni WOJACZEK, Sergiusz BORON

Teletransmission intrinsically safe barriers as an element of safety in wired telecommunication systems


Abstract: In methane coal mines, communication and alarm systems must be intrinsically safe, adapted to work at any methane concentration. Intrinsic safety of telephones and alarm sirens is provided by special teletransmission devices connected to each telecommunication line, colloquially called intrinsically safe barriers. For several dozen years, in all technical solutions of intrinsically safe barriers, the separation of the underground circuits from the surface installations is provided by the transformer. In the HETMAN communication and alarm system, currently used in several mines, capacitors were used for the first time as the separation elements in the line circuit of the intrinsically safe teletransmission barrier. The article discusses these two basic technical solutions of the intrinsically safe teletransmission barriers used in telephone communication and in the alarm systems. The basic functions of an intrinsically safe barrier in the voice communication system in underground mines also have been presented.


Key words: telecommunication in mines, intrinsically safe barrier, capacitor barrier

str. 63



vol. 8, iss. 1/7



The influence of natural hazards on safety of works in underground coal mines


Abstract: The article presents the characteristics of natural hazards occurring with the increase in the depth of exploitation and their impact on the safety of mining operations. Particular attention was paid to climate and methane hazards and their interrelationships. Co-occurrence of natural hazards contributes to a decrease in the safety of mining operations. The increase in natural hazards is associated with an increase in operating costs resulting mainly from the need to combat them.


Key words: climate hazard, methane hazard, fire hazard, operational safety

str. 73



vol. 8, iss. 1/8


Damian ZASINA, Jarosław ZAWADZKI

Do we need heating system schemes for emission inventories of urbanized areas? Study case from Upper Silesian Metropolitan Area


Abstract: The paper presents the quick look on the possible consequences associated with the spatial data manipulations in air emission inventories. The study area is the Upper Silesian Metropolitan Area, located in the southern part of Poland, where the substantial part of dwellers is supplied with the heat from the district heating system. Is shown that skipping some spatial information, or use of incomplete/obsolete data sets can make the uncertainties of the CO2 emission inventory from the residential sector almost ten times bigger in particular areas. Uncertainties tend to increase along with the number of spatial transformations.


Key words: emission inventory, CO2, uncertainties, spatial analysis

str. 87



vol. 8, iss. 1/9


Joachim KOZIOŁ, Michał KOZIOŁ

Fuel properties and their suitability indicators


Abstract: The paper indicates that its energy, ecological, economic and social properties should be considered when assessing the value of fuel. Suggestions of usefulness indicators characterizing particular properties were presented. In addition, it was shown that its calorific value can be considered as a parameter determining the quality of fuel.


Key words: fuel properties, suitability indicators

str. 96



vol. 8, iss. 1/10


Krzysztof KOTWICA

Disk tools – an alternative to cutting tools


Abstract: The article presents problems related to the mining of compact and very hard rocks with cutting tools, mainly with tangential-rotary picks. The currently used disc tools, their parameters and the way of working are described. The disadvantages of selected solutions and related obstacles to their wider use in mining have been presented. The directions of further development of disk tools were presented, allowing their use, for example, in mining heads of longwall shearers and roadheaders.


Key words: disk tool, tangential-rotary pick, wear, hard rock

str. 103



vol. 8, iss. 1/11


Łukasz BOŁOZ

Quality assessment of conical picks for public procurement purposes


Abstract: The article presents the results of a study on the quality of conical picks for the purposes of tender procedures in accordance with the public procurement law in Poland. The pick studies presented here are one of the few that in practice allow the selection of an offer based on objectively determined numerical indicators defining the quality of the product and not only on the basis of price. Thanks to this, the contracting party can decide the relevance of price and quality in their evaluation of a pick. The geometrical and material parameters required in a tender, if not met, are the basis for rejecting a given offer of picks. The numerical parameter influencing the final evaluation of the offer is the picks' rate of wear. The article presents the results of studies on geometric parameters, material parameters and the rate of wear of 48 sets of picks conducted for a tender consisting of 14 tasks. The tender was conducted for 6 underground mines of a coal company. Five producers submitted their offers for selected tasks in the tender.


Key words: conical picks, offer selection, public tenders, durability

str. 115



vol. 8, iss. 1/12


Marta Gándara MILLÁN

The new industrial revolution: circular economy in European Union


Abstract: The industrial activity and consumption habits are using the natural resources disproportionately over the time. Meanwhile, waste generation is increasing too fast, causing continuous accumulation of waste in landfills and contamination to the atmosphere. Decoupling economic growth and rising living standards from waste generation is urgent for our survival. The objective of this article is to provide an overview of the environmental problem that European Union (EU) is facing and how can change the business model in industries to prosper in the society without detriment to future generations. In this way, this document describes the lines of action to achieve sustainable economic models, as well as some examples of new business framed within the circular economy, and how are being implemented in Spain, as a member country in EU, with the purpose of contribute to the common improvement.


Key words: productivity of resources, industrial ecology, circular economy, raw material, eco-design, servitization, upcycling, refurbishing

str. 126



vol. 8, iss. 1/13



The impact of geometric data generalization on the accuracy of deformation predictions of the mining area – construction of a digital deposit model


Abstract: The article presents the problems related to the construction of a digital model of the deposit, which may be the basis for the preparation of exploitation data for the purpose of prognostic calculations. DDM (Digital Deposit Model) is understood here as a database along with software allowing at any point for determining elevation points, thickness, roof lowering, etc. Seam floor is represented as a network of triangles TIN (Triangulated Irregular Network) with vertices located on borehole points, elevation datapoints and faults. In the same way, we create a TIN surface of coal and rock thickness, density, sulphate, anticipated floor dinting, etc. The program allows for visualization of the surfaces by means of isolines and coloring. It is possible to generate a cross-section through a rock mass between any points, which is an excellent verification tool of the model. Projecting of any objects to the surface of calculated lowering allows for easy preparation of the forecasted elevation map. We can also edit surfaces: adding points, gradating propagated changes, extrapolating, smoothing and simplifying. The article analyzes the creation and editing of exploitation parcels based on the digital deposit model. The method of bilateral communication between a digital map and mining area deformation forecast software. The possibilities of the Geolisp program in the scope of visualization of the results of prognostic calculations, searching for facilities meeting specific criteria, generating reports, coloring buildings according to the deformations category etc. were listed.


Key words: Digital Deposit Model, mining surface deformation, mining map

str. 136



vol. 8, iss. 1/14



Participation of employees in safety management of a modern mining company


Abstract: The article discusses the possibility of employee participation in the area of occupational health and safety. Participation consists in enabling each employee to make an assessment of occupational risk in the occupied position using a questionnaire. The advantages and disadvantages of this type of solution are indicated in relation to the mining company. The stages of the risk assessment procedure are also described.


Key words: employee participation, occupational risk assessment, safety management

str. 147



vol. 8, iss. 1/15


Czesław MAZUREK, Korneliusz JENDRZEJEK, Andrzej SŁOWIK, Andrzej ZIMNOL, Stanisław TRENCZEK

Fire hazard in the coal fense in the coal wall with the system ventilation "short Y"


Abstract: The article recalls the importance of hazard identification, including mainly in the case of methane hazard and the threat of endogenous fires. The tragic events that occurred in Polish hard coal mines in 2006-2018 were mentioned, with the participation of these threats. Presented are the conditions in which the operation of the ROW Mine Ruch Jankowice is carried out with co-occurrence of methane and fire hazards, and several examples of such walls are described. The further part discusses, in more detail, the use of ventilation by the so-called short "Y" in the walls exploiting the 408/1 deck and the scope of fire and methane prophylaxis. At the end, several conclusions are presented resulting from the experience gained during operation in conditions of coexistence of methane and fire hazards.


Key word: ventilation, fire prevention, methane prophylaxis

str. 152



vol. 8, iss. 1/16


Grzegorz STOPKA

Numerical simulation in design proces of the new generation mining head with disc tools


Abstract: The article presents a concept of the new generation mining head with disc tools and current scope of research related to experimenal verification. In the article the basic issues that are the subject of current simulation modeling are presented related to the development of the head construction, including modeling of dynamics of power transmission system and the simulation of disk tool loads.


Key words: disk tool, mining head, numerical simulation, MBS, DEM

str. 164



vol. 8, iss. 1/17



A modern approach to mining company management with the use of a dedicated SZYK2 IT system


Abstract: The article presents the issues of the climate package adopted in the EU and related to obligations to reduction the emission of CO2. The key assumptions of the climate package were discussed, along with the tool on the emission reduction, such as: European Union Green-house Gas Emission Trading System (EU ETS). The phenomenon of emissions leakage is present-ed and an impact on the coal industry development in Poland, which can be associated with jobs reduction in the mining industry in the country. The article shows influence of the decarbonisa-tion policy of energy system on the economic competitiveness of the member states in compari-son of the other countries where there are no emission limits.


Key words: sustainable development, climate package, emission

str. 173



vol. 8, iss. 1/18



Design and task approach in planning and monitoring the mining company’s operations using the SZYK2 IT system


Abstract: The article contains an overview of the SZYK2 IT system supporting management of a mining enterprise. This article provides information about the design and planning and monitoring of the company’s operations, such as: rules for creating a plan in terms of tasks, planning resources in scope, consumption of resources during implementation.


Key words: management, mining enterprise, IT systems, projects, monitoring

str. 185



vol. 8, iss. 1/19



Possibility of using xcentric ripper to excavate deposits of rock raw materials


Abstract: The article presents the possibilities of using xcentric rippers for the mining of selected deposits of rock raw materials. The general construction and technical-working parameters of selected types of vibratory ripper were presented as well as the scope of their applications depending on the properties of rock excavated. The advantages of the use of vibratory ripper for the hydraulic hammers used in the rock raw materials mines were also compared.


Key words: opencast mining, rock raw materials, rock excavation, xcentric rippers

str. 192



vol. 8, iss. 1/20



Optimization of the ventilation network parameters of the X mine in the event of liquidation of one of the ventilation shafts


Abstract: The article deals with the issue of determining the parameters of the ventilation network of the Mine X for the future model of its target operation, in which after completion of the phase of unnecessary infrastructure liquidation will act as a central pumping station for all mines of the Bytom Basin. The article presents the results of measurements of the parameters of the current ventilation network of Mine X and with the help of the AERO-2014D program of the POK "Zachód" Spółka z o.o. simulation of its network parameters in the target model after the liquidation of the "Witczak" shaft. The obtained results allowed to determine the technical measures to be taken to ensure the stability of the ventilation network in the future target model of the X mine.


Key words: mine, ventilation network, target model, shaft, main fan, efficiency, equivalent hole, accumulation, aerodynamic potentials

str. 203



vol. 8, iss. 1/21


Wiesław PIECHA, Grzegorz MIODOŃSKI, Przemysław BUKOWSKI

Determination of safety pillars from the sources of the water hazard in underground coalmines


Abstract: Amendments to legal regulations forced the necessity of a special interest in the issue related to the problem of determination, establishing and eliminating safety pillars from the sources of water hazard. This applies mainly to mining geologists and high mining plant managers who have to do it this obligation. This is a complex issue. Existing law regulations do not provide for additional regulations regarding the classification of risks occurring together. In the article the authors present formal and legal requirements regarding the necessity of determining safety pillars in underground coalmines. They also describe their classification. Presented and reminded of the principles commonly used to determine the critical dimension of the safety pillar with the genesis of their emergence. Problematic is the fact that the patterns used in the literature are uncritically formulas especially in the context of advanced gallery workings without coal in specific mining and geological conditions.


Key words: safety pillar, critical dimension of the safety pillar, legal reguirements for designation of safety pillar, formulas for determining safety pillars

str. 222



vol. 8, iss. 1/22



System for monitoring the shield support geometry


Abstract: The article presents the results of the PRASS III project related to the development of a mechanized shield support monitoring system – SSMS. Concepts and models of devices included in the SSMS system were presented. As a result of implementing the project results into industrial practice, it is planned to improve the workplace safety in the mining wall and to improve the technical safety of the longwall system machines. The SSSMS system will allow for the prediction of roof falls in the longwall, and ultimately the minimization of this phenomenon, through the implementation of good practices in the field of mechanized roof support.


Key words: mechanized shield support, shield suport section geometry measurement, longwall complex

str. 238



vol. 8, iss. 1/23



No emissions GAD-1 suspended locomotive with electric drive


Abstract: Introduction of growing number of diesel drives to mine undergrounds creates a significant discomfort of work associated with concentration of exhaust gases and with generated heat. Emission-free GAD-1 suspended locomotive with electric drive, equipped with state-of-the-art batteries, can be an alternative design or can be a completion to diesel transportation machines.


Key words: no emissions, battery, high energy density

str. 247



vol. 8, iss. 1/24


Adam PIERCHAŁA, Przemysław CZUGA

Way of venting the chwalowice main from Donnersmarck-Grubbe to PGG S.A. ROW coal mine in the Chwalowice mining region


Abstract: The article describes a short history of the Chwalowice coal mine from its inception in 1903 to this day. Natural hazards and technical obstacles occurring during the existence of the mining plant have been described. The article presents the method of ventilation of the coal mine from two twin shafts and one fan installed undrground via 4 intake shafts and 6 exhaust shafts after connecting the Chwalowice and Rymer mines in 1995 to the 3 air intake shafts and 2 exhaust shafts currently operating at ROW coal mine in the Chwalowice mining region.


Key words: Chwalowice coal main, ventilation, main ventilation fans, ventilation shafts

str. 252



vol. 8, iss. 1/25



Hearing loss among miners working in hard coal mines


Abstract: The article deals with the problem of hearing loss among miners of hard coal mines. Describes hazards related to noise occurring in the mining work environment. It presents the results of short test tests identifying hearing disorders among a selected group of mine employees. The article also tries to assess the weaknesses and strengths of the hearing diagnostics system in Poland. It presents interesting results of surveys conducted among miners in the field of noise hazards and draws attention to the possibility of introducing innovative solutions in the field of diagnostics and prevention of hearing disorders in Polish mines.


Key words: hearing loss, noise, miner, mine, noise hazard, hearing test, questionnaire research, prophylaxis

str. 263



vol. 8, iss. 1/26



Mines gas. Experience from the operation of gas engines


Abstract: There are described experiences connected with perennial exploitation of the cogenerational engine generators powered by gas engines which are fueled by methane in the article. There is covered a subject connected with sourcing the gas from demethanization of mines as an impulsive fuel for gas engines. There is signalized the issues connected with searching the experimental solutions and applying them in the industry to find the solutions increasing the reliability of the machinery park in the simultaneous maintenance or cost reduction.


Key words: gas engine, cogeneration, methane, gas energy

str. 280



vol. 8, iss. 1/27


Katarzyna MIDOR, Witold BIAŁY

Methods of assessment of suppliers for businesses


Abstract: The article presents a proposal of methods for assessing suppliers in an enterprise and developed those that are most often used in companies. Attention was also paid to the importance of the provider for the organization and a new approach to the purchasing process resulting from the current market requirements.


Key words: assessment, suppliers, selection of suppliers, the purchase process

str. 290



vol. 8, iss. 1/28



Methane hazard – literature review


Abstract: One of the most dangerous phenomena associated with the extraction of hard coal is the occurrence of methane in its seams. Despite enormous progress in identifying and combating the methane hazard, its growth is observed in many mining areas of mines, which is strongly related to the increase in the depth of exploitation, the increasingly methane-free nature of deposits and the gas reservoir pressure. For the purpose of effectively counteracting dangerous phenomena related to methane hazard, aimed at improving occupational safety and health in mining, it is indispensable to cooperate with all mining industry, in particular with scientists and R & D units. This article analyzes the available literature in this area and presents the development of methods and means for the diagnosis and forecasting of methane hazard.


Key words: methane content, methane content, one-day forecast, methane drainage, methane prophylaxis, telemetric systems

str. 300



vol. 8, iss. 1/29



The statistical burden of the test method in relations to the standard no 17025 revised edition


Abstract: Determination of the measurement procedure statistical burden makes it possible to determine the rate and type of systematic errors, which can be eliminated by proper amendments. The best method to estimate this parameter is to use linear regression. The publication of the new standard no 17025 for testing and calibration laboratories imposes on the above-mentioned units a change of approach in some works’ aspects. The changes that were made refer as well the measurement consistency maintaining area. In this case, determination of the statistical burden must be carried out by using the certified data of comparison from reliable manufacturer. The maintenance of the measurement consistency indicates that the linear regression determined for the estimation has to be weighted illative to ( X and Y) type.


Key words: statistical burden, standard no 17025, linear regression, certified data of comparison

str. 314



vol. 8, iss. 1/30


Renata MACZUGA, Marek SITKO, Wojciech CEBO, Zbigniew KORNASZEWSKI

General overview of the mechanical coal processing plants in PGG S.A.


Abstract: In Poland, Grupa Górnicza S.A. has 8 coal mines and one eco coal production plant. As part of the mines, there are 13 Mechanical Coal Processing Plants connected technologically with the mining process. The processing plants have diversified coal enrichment technology depending on the type of coal processed. Two types of coal are produced depending on the application: steam coal and coking coal. At the moment, coking coal is produced in two mines: KWK ROW and KWK Ruda. Steam coal is produced in other mines. Two types of eco coal are currently produced at ZPE WOLA. The eco coal is also produced at KWK ROW Ruch Chwałowice and at KWK Wujek. In KWK Wujek, certified aggregate is also produced based on the collected post-wash stone. The offer includes road aggregates in accordance with the applicable standards. The coal produced by PGG S.A. is characterized by low sulphation.

The process of coal enrichment in processing plants is mainly carried out based on three methods of enrichment:

  • gravity in heavy suspension liquids,
  • gravitational in an aquatic center,
  • flotation.

In all processing plants, coal with coarse and medium grains is enriched.


Key words: processing plant, assortment, aggregates, production capacity, type of coal, quality parameters, modernization

str. 323



vol. 8, iss. 1/31


Renata MACZUGA, Wojciech CEBO

Production of ecological coal in the aspect of air protection


Abstract: The main components of the air are nitrogen, oxygen and argon totaling 99.9% by volume. The remaining ones with the highest share are carbon dioxide, neon and helium. In addition to solid components, atmospheric air contains a number of other components that are emitted to the atmosphere as a result of processes occurring in nature or as a result of human activity. All solid, liquid or gaseous substances changing the average atmosphere composition are considered atmospheric air pollution. The introduced pollutants into the atmospheric air can have harmful effects on human health and its surroundings if their content exceeds certain acceptable values. In large clusters with dense buildings, due to specific urban and meteorological conditions, there are threats of exceeding the permissible levels of concentrations of pollutants in the air and the formation of smog. The improvement of air quality is related, among others, to the use of high quality carbon fuels for heating purposes. The quality of coal as such does not solve the problem without the use of appropriate modern thermal installations, especially in the municipal and living sector. However, the use of high-quality ecological coal is an appropriate action in the direction of air protection. PGG S.A. has a system for monitoring and controlling the quality of coal, ensuring the placing on the market of coal with high quality parameters, including ecological assortments for the needs of customers from the municipal and household sector. All coal fuels offered for this sector fulfills current quality requirements related to air protection. It is essential that the combustion of high quality coal takes place in appropriate, adapted to this, effective modern domestic boilers.


Key words: air protection, smog, municipal sector, meteorological factors, anti-smog resolutions, ecodesign, eco coal

str. 334



vol. 8, iss. 1/32


Renata MACZUGA, Wojciech CEBO

Quality of coal producing by PGG S.A. for recipients of the communion and battle market


Abstract: The improvement of air quality is associated, among others, with the use of high quality carbon fuels for heating purposes. The quality of coal does not solve the problem without the use of appropriate modern thermal installations, especially in the municipal sector. However, the use of high-quality heating coal is an appropriate action in the direction of air protection. PGG S.A. has a system for monitoring and controlling the quality of coal, providing coal for the needs of customers with an installation up to 1 MW. The quality control system for the produced coal is carried out at PGG S.A. by the Quality Control Department and complies with the applicable technical standards and legal regulations. As part of the Integrated Management System, there are quality procedures implementing formal and legal solutions and defining the principles of quality control of production at PGG S.A. In its product offer PGG S.A. has high-quality coal dedicated to the communal housing market. It is a high quality coal corresponding to the requirements of eco coal (Qir ≥ 24,000 kJ/kg) and fulfills the requirements of applicable laws in this area.


Key words: municipal sector, thermal installations up to 1 MW, sampling and preparation, quality parameters, ash content, total sulfur content, calorific value, total moisture content

str. 348



vol. 8, iss. 1/33


Renata MACZUGA, Łukasz MAZANEK, Radomir ROGUS, Wojciech CEBO

The product offer and directions of changes on the fuel coal market in the Polish Mining Group


Abstract: In the perspective of regulatory changes taking place in the municipal and residential sector of the heating coal market, it is necessary to adapt the product offer to environmental requirements included in legal acts at the international, state and local level. The responsibility of PGG S.A. as the leading producer of heating coal is to adapt the product portfolio to the growing demand for fuel supporting the prevention of the widely harmful phenomenon of smog. The article presents the current PGG S.A. assortment, along with the most important parameters defining the quality of fuels.


Key words: heating coal, ecological fuels, anti-smog laws, municipal and residential market, energy poverty, Polish Mining Group

str. 358



vol. 8, iss. 1/34



Simulation of the non-linear summation effect due to subsequent mining extraction using the theory of cellular automata


Abstract: The paper presents an example of real subsequent hard coal mining in the seam 338/2, which caused the formation of a subsidence trough on the surface of the mining area which after extraction of the longwall No. 2 was characterized by a significant asymmetry. Surface deformations were covered by systematic leveling measurements along the measurement line “1”. For the illustrated example of underground mining, numerical calculations were made using the theory of cellular automata. A non-linear transition function was used. Calculated data were compared with the results of geodetic observations. The aim of the article was to verify the theoretical assumptions of the model and to demonstrate the practical possibilities of applying the method to assess the subsidence of the mining area.


Key words: subsidence, rock mass, cellular automaton

str. 365



vol. 8, iss. 1/35


Witold BIAŁY, Grzegorz WILKOWSKI

Gear gears used in machines/mining devices


Abstract: The article presents a basic assortment, which is produced in Zakłady Mechaniczne GLIMAG S.A. in Gliwice. The history of the Department has been presented, from the moment of their creation to today. Briefly presents the basic products of the Department, together with their technical parameters. In the summary, attention was paid to the problem related to the economic situation in the mining industry and the directions of actions taken by the Plant's management in order to ensure the use of existing staff and machine park.


Key words: gears, mining industry, production, personnel

str. 376



vol. 8, iss. 1/36


Grzegorz STROZIK

The importance of the filling of the goaf with fine-grained waste for safe operation of longwalls with caving


Abstract: Filling of cavings (goaf) is currently the most widespread technology of filling underground voids in Polish coal mining. Obtaining optimal results in the area of elimination of spontaneous ignition of coal remnants in goaf and other benefits in terms of climatic and ventilation conditions requires subsequent continuing of filling operations and use of mixtures with appropriate concentration of solids. Obtaining the effects related to limiting the deformation of the rock mass and surface subsidence is also achievable, however, it requires the use of mixtures with a high concentration of solid parts and a multi-point mixture placement system, which practical solution is a system of trailing pipes behind the hydraulic shield supports in a longwall. The article also presents the legal basis for the use of industrial waste in underground technologies as well as the necessary elements of the technical and operational documentation for the technology of filling of cavings.


Key words: insulating of longwall goaf, filling of underground voids, fly ash – water slurries

str. 392



vol. 8, iss. 1/37



Measurements of selected vibroacoustic of conveyor belt transmission


Abstract: The publication presents measurements of conveyor belt transmission carried out in underground conditions of a Coal Mine. The measurements were carried out at the interval of a half - year perspective of the time period. On the basis of the obtained results, a preliminary analysis of changes in the value of selected vibroacoustic parameters of the transmission was carried out in the aspect of its technical condition. Initially, changes in these parameters were also analyzed in the perspective of the elapse of operating time.


Key words: vibroacoustics, conveyor belt transmission

str. 403



vol. 8, iss. 1/38



Analysis of operating costs of the main coal mine dewatering system


Abstract: The main mine dewatering system is an essential element in the exploitation of underground mining plants. The system consists of many elements such as water channels and water walkways, underground tanks, powered pumps, and discharge pipelines. The operation of this system is independent of the current extraction, constituting a fixed cost of maintenance for the mine. Depending on the depth of the mine and the average inflow of water, this cost consists of the cost of electricity supplying the pump, the cost of depreciation of equipment, the cost of service and the costs of possible water disposal along with environmental charges. The article presents considerations regarding the reduction of main drainage operation costs through appropriate equipment operation and appropriate repair policy. The presented results are based on a real analysis of the functioning of the drainage system of one of the Polish mines.


Key words: operation of pumps, main dewatering, cost reduction

str. 413



vol. 8, iss. 1/39



The earth magnetic field in granite blocks cutting process


Abstract: This document reports on the problem of magnetic fields during the preparation of granite blocks. The most prominent problem consists of the use of long, thin cutting tools by which the magnetic field introduces detours in the cutting-process, losing more than 15% of granite block as raw material. In order to avoid or minimize the effects of magnetic fields, the magnetic orientation of the industrial building must be considered and the true deviation produced by the field must be calculated. On the contrary…, what happen when the workshop is built without magnetic considerations?. First of all we need to know and separate the effects of fields. In marine terms, this problem consist of calculating the total correction due to the effects of true magnetic field (δm) and deviation (Δ). Like a vessel navigating around the earth, the true course is the addition of two terms: compass course (magnetic) and effects of total correction (δm + Δ) where it is produced by the total metal mass around me and δm is the magnetic field of the earth in this point. We are going to calculate the total correction (ct).


Key words: cutting-process of granite blocks. Effects of magnetic fields in granite blocks. Total magnetic corrections in a workshop

str. 420



vol. 8, iss. 1/40



Verification of S. Knothe theory parametres values for the region of intense, multi-seam mining exploitation


Abstract: The article presents the results of the analysis of measured deformations of the surface of the mining area in the region of the impact of very intense, long-term and multi-seam exploitation conducted by the "X" and “Y” mines in the field “K”. This analysis showed that the impacts in conditions of a very strongly deformed rock mass do not differ significantly from the impacts observed in conditions of less intensive mining exploitation. However, they are characterized by a slightly higher coefficient of variability of analyzed deformation indices than in other regions of USCB.


Key words: mining damage, rock mass, geometric-integral theory

str. 429



vol. 8, iss. 1/41


Dawid SZURGACZ, Patryk SZOLC, Grzegorz CUBER

Improving the longwall complex based on operational tests at KWK ROW ruch Chwałowice


Abstract: The publication presents a possible method for improvement of a longwall complex on the example of a mine KWK ROW Ruch Chwałowice. The analysis was aimed at defining the capabilities of an innovative central hydraulic control system for powered roof supports. A 3D model was developed in order to analyse possible damage to the structure of a canopy.


Key words: operational tests, longwall complex, hard coal mine

str. 439



vol. 8, iss. 1/42



Green and intelligent supply chains dedicated to the coal industry


Abstract: This paper presents some proposals of future direction of scope of manage coal supply chains. What is more, some of scientifically unexplored strains has been developed. Because of specific character of discussed industry and a product relocation, the paper is concentrated on green and intelligent supply chains. As a result of an action taken, it has been stated that studies about coal supply chains are fixed poorly in worldwide literature about chains' supplies.


Key words: intelligent supply chains, green supply chains, industry 4.0, coal industry

 str. 446 pobierz


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