Communications - Scientific Letters of the University of Zilina - Latest articles

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Modelling of Dynamic States of Five-Phase Induction MotorElectrical Engineering in Transport

Pavel Záskalický, Daniela Perduková, Jan Kaňuch

Communications - Scientific Letters of the University of Zilina 2025, 27(4):C70-C77 | DOI: 10.26552/com.C.2025.053  

In this paper is presented a mathematical model of a five-phase induction motor with a cage rotor and a stator coils connected to a star. In constructing the mathematical model, It is assumed that the motor is fed from a five-phase frequency converter with an ideal harmonic waveform of the output supply voltage. It is considered that the motor operates in an open control loop with the ability to control the frequency and amplitude of the supply voltage. The basic voltage equations in a two-phase coordinate system coupled to a stator are derived, as well as the relation for the electromagnetic moment. Based on the parameters measured on a real motor,...

Carpooling in Transport in Today's ICT - Based EconomyOperation and Economics in Transport

Paulina Wiączek, Iryna Sitak, Alena Novak Sedlackova, Andrej Novak, Martin Bugaj

Communications - Scientific Letters of the University of Zilina 2025, 27(4):A48-A59  

The purpose of this research was, among other things, to show that the carpooling model can be regarded as a manifestation of collective intelligence and a response to the crisis of sustainability in today's ICT-based economy, which makes carpooling services a cheaper alternative to transportation services provided by other modes of transport: train and bus. The main research problem is contained in the question: How do collective intelligence and the tenets of sustainability influence the popularity of carpooling and the lower cost of carpooling services, compared to those provided by other forms of transportation? The critical literature analysis...

Detection of Selected Regulatory Traffic Signs Using Common Dashboard CameraElectrical Engineering in Transport

Dušan Koniar, Libor Hargaš, Matúš Danko

Communications - Scientific Letters of the University of Zilina 2025, 27(4):C61-C69  

Nowadays, many modern vehicles contain a lot of systems for autonomous functions or driver assistance systems (traffic sign recognition). Modern vehicles contain many embedded systems and control units (also for signal and image processing), so implementation of deep learning or AI-based algorithms is possible. In older vehicles, mentioned systems missing or they are limited. In this paper is presented a design of algorithm for detection of selected regulatory traffic signs to extend the selected autonomous or intelligent functions of older vehicles. Algorithm is based on shape and color detection of key features of selected regulatory traffic signs...

Geolocation of Devices in Low-Power Wide-Area LoRa NetworkManagement Science and Informatics in Transport

Ladislav Zemko, Daniel Hroš, Alexander Valach, Marek Galinski, Pavel Čičák

Communications - Scientific Letters of the University of Zilina 2025, 27(4):E46-E62  

This article is focused on the geolocation possibilities in low-power deployments. A novel Logarithmic Distance Path Loss Model with a Memory (LDPL-M) algorithm is proposed to enhance the accuracy of determining the location of end devices. The proposed solution, utilizing the RSSI-based trilateration, proved more accurate by 24.54% compared to the conventional Logarithmic Distance Path Loss Model (LDPL). Compared to the Global Positioning System (GPS), the power consumption was 48.8% lower. These findings make it suitable for energy-harvesting deployments, environments with limited power supply, or generally hard-to-reach areas, covering various...

Algorithm for Making the Optimal Decision for Further Operation of Freight CarsMechanical Engineering in Transport

Adil Kadyrov, Perizat Baigozhina, Aliya Kukesheva, Imanov Marat, Akbope Karsakova

Communications - Scientific Letters of the University of Zilina 2025, 27(4):B261-B277  

The article deals with the methodology of selecting the optimal decision for the maintenance and operation of freight cars. The statistics of failures for the main units of freight cars has been collected. A hypothesis has been proposed about the method of selecting a decision based on the optimality criterion, i.e. the maximum profit. The optimality criterion is the difference between the income and the costs and is the function of the frequency of certain operations on each of the car units. An algorithm has been developed that allows for the effective optimization of the processes of operating, repairing, and writing-off the cars, ensuring an...

Methodology for Assessing the Key Operational Efficiency Indicators for Removal and Shunting Operations of Shunting LocomotivesMechanical Engineering in Transport

Gabit Bakyt, Aizhan Makhanova, Murat Mussabekov, Galymzhan Ashirbayev1, Malik Zhamankulov, Kuantkhan Sarsenov, Aisha Mussabekova

Communications - Scientific Letters of the University of Zilina 2025, 27(4):B250-B260  

The problem dealt with in this article is the methodology of the key performance indicators (KPI) evaluation of shunting locomotives operation when performing hauling and shunting work. The main parameters affecting the efficiency of rolling stock operation are described, including performance, fuel efficiency and locomotive utilization rate. The algorithm of KPI calculation is proposed, based on the analysis of operational data and statistical methods is proposed. According to the analysis of the trend in cargo transportation over the past 3 years, the need to develop a methodology for evaluating the key performance indicators of shunting work is...

Evaluation of Silicone Carbide Mosfet Driving Circuit PerformanceElectrical Engineering in Transport

Veronika Švárna, Michal Frivaldsky

Communications - Scientific Letters of the University of Zilina 2025, 27(4):C53-C60  

The performances of different driving circuits configurations designed for silicon carbide MOSFET transistors are compared in this research. The simulation of the double-pulse test (DPT) was performed with the use of three driving circuit configurations. The SiC MOSFET NTH4L022N120M3S has great dynamic parameters, which made it suitable for the DPT simulation. It was performed with six different driving voltage ranges, all within the range between -10 V and 20 V. The results were taken across the wide range of driving resistances placed between the driver and the SiC MOSFET, where the switching losses were taken. Drawing from the observed measurements...

Modelling the Equivalency Factor of E-Rickshaw under Heterogeneous Traffic ConditionsCivil Engineering in Transport

Amir Ali Khan, Sachin Dass

Communications - Scientific Letters of the University of Zilina 2025, 27(4):D102-D115  

E-rickshaws, as emerging transport modes, notably affect mixed traffic flow on urban roadways. To evaluate their influence relative to other vehicle types, this study aim was to determine the Passenger Car Unit (PCU) value for e-rickshaws, as the Indian Roads Congress has yet to assign one. Three analytical methods were used: Chandra’s method, the homogeneous coefficient method, and multiple linear regression. Data were gathered via three-hour video recordings at three different locations, each in Hapur and Sonipat. Using VLC media player, vehicle speeds and counts were extracted for analysis. The data were then processed in SPSS and Excel to...

The Research of the Engine-Reducer Assembly in the Traction Transmi̇Ssi̇on SystemMechanical Engineering in Transport

Ayaz Abdullaev, Ilham Huseynov, Israil Elyazov, Elchin Yusifzade, Ramin Abdullaev, Allahverdi Sharifov

Communications - Scientific Letters of the University of Zilina 2025, 27(3):B237-B249 | DOI: 10.26552/com.C.2025.045  

During the movement of the train in various operational regimes, a series of deficiencies arise in the mechanical components, which depend on kinematic and parametric factors affecting the working conditions of the traction drive. An innovative traction drive is discussed in this article, which prevents the non-uniform distribution of parametric factors, as well as dissipative, inertial, and elastic characteristics along the length of the track.

Evacuation Transport Provision Design Using Network Analysis with Gis SupportSafety and Security Engineering in Transport

Jozef Kubás, Jozef Ristvej, Boris Kollár, Katarína Petrlová, Alexandra Trličíková, Kateřina Blažková

Communications - Scientific Letters of the University of Zilina 2025, 27(3):F13-F27 | DOI: 10.26552/com.C.2025.044  

The research presented in paper has focused on design of the transportation evacuation during a special flood caused by an accident at a water structure using GIS-enabled network analysis. Freely available population and address point data were used to calculate the number of residents at risk. Three scenarios of time required for each evacuation activity were determined using the PERT method, and the time required for evacuation was determined using a Gantt chart. The approach proposed in the paper is suitable for obtaining relatively quick results that can be taken into account when preparing for crisis events. The results of the case study proved...

Economic Determinants of Gasoline Prices: A Cointegration Analysis for CzechiaOperation and Economics in Transport

Jiří Alina, Jiří Nožička

Communications - Scientific Letters of the University of Zilina 2025, 27(3):A40-A47 | DOI: 10.26552/com.C.2025.043  

The long-term relationships between the N95 ("Natural 95") gasoline prices and economic factors, such as Brent crude oil prices, diesel fuel prices, and the CZK/USD exchange rate from 2014 to 2024, was investigated within this research. The Engle-Granger cointegration test was used to identify any stable long-term connections between these variables. Despite the comprehensive tests, facilitated by the Matlab software, no evidence of cointegration was consistently found, indicating that these economic factors do not significantly influence N95 gasoline prices over the long term. The findings suggest that, while the short-term fluctuations in these economic...

Determination of the Optimum Combination of Parameters of Specialized Blades for the Shantui SD 32 Bulldozer When Moving Low-Density MaterialsMechanical Engineering in Transport

Tavbay Khankelov, Maloxat Abdukadirova, Otabek Ochildiev, Zebo Alimova, Gulxayo Niyazova, Anvar Kadirov

Communications - Scientific Letters of the University of Zilina 2025, 27(3):B225-B236 | DOI: 10.26552/com.C.2025.042  

Recommendations are given on combinations of parameters of box-shaped and "dump" types of dumps for the SHANTUI SD 32 bulldozer, which provide the highest technical characteristics of the bulldozer when moving low-density materials. The optimal dimensions of a box blade for equipping the SHANTUI SD32 bulldozer are a grasp width of up to 3730 mm, radius of curvature of up to 1700 mm, width of the cutting edge of up to 460 mm, canopy width of up to 140 mm, flap length of up to 860 mm. The optimal dimensions of a "landfill" blade for equipping the SHANTUI SD32 bulldozer are a grasp width of up to 3900 mm, radius of curvature of up to 460 mm, width of...

Influence of the Cutting Angle on the Resistance of Bulldozer Working Equipment Blade Burial When the Machine Is MovingMechanical Engineering in Transport

Nursat Baikenzhe, Shynbolat Tynybekov, Bakytzhan Kyrgyzbay, Kazyna Ashim, Nurbol Kamzanov, Rustem Kozbagarov

Communications - Scientific Letters of the University of Zilina 2025, 27(3):B216-B224 | DOI: 10.26552/com.C.2025.041  

The influence of the cutting angle on the resistance to the bulldozer blade burial during its movement, taking into account the one-sided stressed state of the soil, was studied in the research results of which are presented in this paper. It is established that the resistance to deepening is significantly reduced when the machine is moving, which allows using smaller cutting angles without increasing the energy consumption. Constructive features and kinematics of the working equipment are considered, including a promising parallelogram scheme, which provides automatic reduction of the cutting angle during deepening. Calculations of the resistance...

Predicting Residual Life of Toro-40D Units Using the Oil Spectral Analysis MethodMechanical Engineering in Transport

Bakytzhan Kyrgyzbay, Mergen Zhumanov, Yerbol Kaliyev, Nurbol Kamzanov, Nursat Baikenzhe, Rustem Kozbagarov

Communications - Scientific Letters of the University of Zilina 2025, 27(3):B208-B215 | DOI: 10.26552/com.C.2025.040  

At the underground mines of Kazakhmys Corporation, where different types of highly productive self-propelled equipment with different types of pneumatic wheel drive are operated, there are significant downtime of technological equipment. As practice has shown, application of repair system with use of old methods and means, at operation of underground self-propelled equipment appeared to be ineffective. One of the main reasons of low efficiency of self-propelled machines operation is the absence of the system of continuous monitoring of technical condition of each machine and its aggregates with application of methods and means of diagnostics. To avoid...

Influence of Laser Ablation Treatment on Electrochemical Characteristics of AZ80 Magnesium AlloyMechanical Engineering in Transport

Daniel Kajánek, Luboš Halimovič, Martina Jacková, Leoš Doskočil, Ingrid Zuziaková, Branislav Hadzima

Communications - Scientific Letters of the University of Zilina 2025, 27(3):B198-B207 | DOI: 10.26552/com.C.2025.039  

In this study was investigated the effect of a novel surface treatment technique, called laser ablation or laser surface cleaning (LSC), on the electrochemical properties of AZ80 magnesium alloys. Its effect on corrosion resistance was compared to conventional techniques represented by grinding and polishing. The corrosion stability of the produced surfaces was determined by potentiodynamic (PD) polarization tests and electrochemical impedance spectroscopy in 0.1M NaCl. The results showed that the LSC process produced a regular, uniform surface morphology. Although the LSC treatment led to the passivation of the AZ80 surface, the overall corrosion...

Statistical Research on Braking Malfunctions of Passenger Rolling Stock in OperationMechanical Engineering in Transport

Juraj Gerlici, Alyona Lovska, Vasyl Ravlyuk, Yaroslav Derevianchuk, Oleksandr Derevyanchuk

Communications - Scientific Letters of the University of Zilina 2025, 27(3):B186-B197 | DOI: 10.26552/com.C.2025.038  

In this article are highlighted the results of the research on braking malfunctions of passenger rolling stock identified during the car maintenance. Based on the collected statistical material, the key factors that cause braking malfunctions in operation are highlighted. The main brake equipment units that account for the largest number of malfunctions in operation are determined. The data on the malfunctions of air distributors used in passenger rolling stock was systematized using the STATISTIKA software package. To ensure continuous monitoring and timely detection of defects in the brake system of passenger trains, it is critical to use modern...

Improving the Methodology of Adaptive Traffic Control at Pedestrian CrosswalksCivil Engineering in Transport

Yuriy Royko, Oleh Hrytsun, Romana Bura, Roman Rohalskyi, Yurii Yevchuk

Communications - Scientific Letters of the University of Zilina 2025, 27(3):D90-D101 | DOI: 10.26552/com.C.2025.037  

The paper presents the results of an experimental study carried out at signalized intersections and pedestrian crosswalks in Lviv (Ukraine). The study covered intersections with different traffic conditions. Therefore, the intersections were classified into three types. It was found that the share of pedestrians who cross the road on the prohibitive traffic signal varies from 7% in the central areas to 13% near transport hubs. A methodology, which predicts the pedestrian behavior when they make decisions about crossing the roadway, is proposed. Recommendations were developed for choosing the optimal traffic light control modes. It was found that increasing...

The Influence of Three Parent Crossbreeding on the Dual Population Genetic AlgortihmManagement Science and Informatics in Transport

Esra'a Alkafaween, Obada Alhabashneh, Maram M. Al-Mjali

Communications - Scientific Letters of the University of Zilina 2025, 27(3):E35-E45 | DOI: 10.26552/com.C.2025.036  

A genetic algorithm (GA) is an optimization technique based on natural genetics, using selection, crossover, and mutation. Crossover combines genetic material from two parents to create offspring, maintaining diversity and preventing premature convergence. While the two parents are typically used, multi-parent crossover, involving more than two parents, has shown superior results. in this paper is explored the multi-parent crossover in dual genetic algorithms, which facilitate information exchange between populations through interpolation crossbreeding. Offspring inherit traits from both parent populations, improving adaptability. The Cave-Surface...

Justification of the Possibility for Extending the Service Life of Cast Parts of a Three-Axle Bogie Based on Results of the Running Strength Tests to Determine Their LoadingMechanical Engineering in Transport

Rustam Rahimov, Diyor Zafarov

Communications - Scientific Letters of the University of Zilina 2025, 27(3):B170-B185 | DOI: 10.26552/com.C.2025.035  

The article presents the results of research aimed at assessing the residual life and the possibility of extending the service life of cast parts of a UVZ-9M three-axle bogie used in six-axle scale test wagons. The tests have shown that the maximum stresses in the most stressed areas of the side frame, spring and pivot beams are within acceptable values, which indicates the presence of a residual life. The analysis of safety margin coefficients confirmed that the bogie elements have a significant reserve of operational characteristics. Calculations of the full service life of cast parts, performed based on the experimental data, demonstrated a sufficient...

Research on the Use of Biogas as an Additive to Compressed Natural Gas for Supplying Vehicle EnginesMechanical Engineering in Transport

Oleksandr Kravchenko, Roman Symonenko, Juraj Gerlici, Andrii Golovan, Serhii Shymanskyi, Igor Gritsuk, Yuriy Grytsuk

Communications - Scientific Letters of the University of Zilina 2025, 27(3):B158-B169 | DOI: 10.26552/com.C.2025.034  

Internal combustion engines, which operate in various load and speed conditions, are significant sources of environmental pollution that affect a vehicle's movement in traffic. Automotive engines typically operate in unsteady-state modes, transitioning cyclically from one operating mode to another during vehicle operation. The potential of using biogas as an additive to compressed natural gas for automotive engines was explored within this research. The results of experimental studies on the fuel efficiency and environmental performance of a vehicle with a petrol engine, converted to run on a mixture of compressed natural gas and biogas, are presented....

Indicators of the Dynamic Interaction of the Track and Freight Wagons with Increased Axial LoadMechanical Engineering in Transport

Natalya Tokmurzina-Kobernyak, Arailym Tursynbayeva, Laila Sagatova, Marat Shurenov, Assel Kurbenova

Communications - Scientific Letters of the University of Zilina 2025, 27(3):B147-B157 | DOI: 10.26552/com.C.2025.033  

The article is devoted to the study of dynamic interaction of rail track and freight wagons under increased axial load. In conditions of increasing the freight traffic volumes and axial loads, the importance of accurate understanding of the mechanisms affecting the wear of rail track elements becomes especially important. In this paper the authors have carried out experimental research and comparative analysis of freight wagon trolleys of different models. As a result of dynamic tests of the freight wagon trolleys, the necessary parameters of dynamic qualities of different models of wagons and their optimal values of axial loads of freight wagons are...

The Operating Procedure of the Device Enhancing the Wheel-Rail AdhesionMechanical Engineering in Transport

Yuriy Y. Osenin, Nataliia Chernetska-Biletska, Sergii Kliuiev

Communications - Scientific Letters of the University of Zilina 2025, 27(3):B138-B146 | DOI: 10.26552/com.C.2025.032  

The results of the analysis of sand application efficiency for improving wheel-rail adhesion are presented. An algorithm for the sandbox operation is substantiated, based on supplying sand under the wheels when their slip reaches a critical level, delivering sand in proportion to the vehicle speed, and automatically purging the sand supply pipes. The principle of sandbox operation is based on the mechanical interaction between the moving elements and sand. It has been established that the maximum adhesion coefficient is achieved when the sand is evenly distributed in a single layer within the wheel-rail contact area. The important role of the contact...

Determination of Optimal Parameters for Ultrasonic Cleaning of Vehicle RadiatorsMechanical Engineering in Transport

Aliya Kukesheva, Adil Kadyrov, Baurzhan Moldabaev, Kirill Sinelnikov, Akbope Karsakova, Elvira Kyzylbayeva

Communications - Scientific Letters of the University of Zilina 2025, 27(3):B126-B137 | DOI: 10.26552/com.C.2025.031  

The research presented in this article was concerned with the efficiency of ultrasonic cleaning of vehicle radiators based on the cavitation phenomenon. A technique has been developed that takes into account the effect of the ultrasonic vibration amplitude and the time of exposure on the process of removing contaminants. The results of experimental studies are presented that confirm that increasing the exposure time contributes to increasing the washed scale mass and decreasing the time of liquid outflow. The developed regression model describes well the changes in the mass of washed scale, which is confirmed by a high coefficient of determination...

Indonesian Aviation Act 1/2009: An Examination and the Quest for Reform in Certain IssuesOperation and Economics in Transport

Adhy Riadhy Arafah, Rosa Ristawati, Kautsar Ismail, Gerlyana Shafa Putri Hardriani

Communications - Scientific Letters of the University of Zilina 2025, 27(2):A27-A39 | DOI: 10.26552/com.C.2025.030  

Indonesian Aviation Act 1/2009, which has been adopted for more than 14 years ago, was made to accommodate the ICAO's Universal Safety Oversight Audit Programme (USOAP) findings in 2007, which highlighted the need for legislative changes to reduce air transport accidents in Indonesia. The Act regulates two aspects of aviation activity, covering the public and private. The public sector regulates aircraft activities in Indonesia's airspace, certain issues are missed owing to (the) controversy over its legal terminology. In the private sector, the jurisdiction issue and applicability of the Act have consequently regarding the applicability of the Montreal...

Redundant Constraints in Crane Disc Brake Mechanism: Effect and Disposal PerspectivesMechanical Engineering in Transport

Vladyslav Protsenko, Volodymyr Malashchenko, Mykhaylo Babii, Valentyn Nastasenko, Roman Protasov, František Brumerčík, Marek Macko

Communications - Scientific Letters of the University of Zilina 2025, 27(2):B118-B125 | DOI: 10.26552/com.C.2025.029  

In this paper is considered a promising design of the braking disk mechanism of a construction crane. The analysis of the kinematics of the brake pad drive has shown that due to redundant links in the brake pad drive mechanism the latter are not able to self-align. This leads to uneven braking torque during the smooth braking, overloads and deterioration of the positioning accuracy of the load suspended on the cable. Based on the methods of analyzing the kinematics of complex mechanisms, two variants of modernization without redundant links are proposed. Both variants can be realized without changing the kinematics of the mechanism, but they differ...

Mathematical Modelling of Hybrid Powertrain Systems for Improved Energy EfficiencyElectrical Engineering in Transport

Oleg Lyashuk, Victor Aulin, Roman Rohatynskiy, Ivan Gevko, Andriy Gypka, Dmytro Mironov, Volodymyr Martyniuk, Artur Lutsyk, Nadia Denysiuk

Communications - Scientific Letters of the University of Zilina 2025, 27(2):C36-C52 | DOI: 10.26552/com.C.2025.028  

The development and simulation of a mathematical model for a hybrid powertrain vehicle, aiming to optimize its energy efficiency and dynamic performance is presented in this study. Implemented in MATLAB/Simulink, the model captures the dynamic interactions between the hybrid system's components, including the internal combustion engine, electric motor, and battery. By conducting a full factorial experiment, the specific power of the hybrid vehicle was analyzed, revealing the critical influence of factors such as driving speed, road gradient, and battery state of charge. The proposed model demonstrated a discrepancy of 4-11% between the simulated and...

The Strength Calculation of the Modernized Brake Lever Transmission for a Wagon BogieMechanical Engineering in Transport

Sergii Panchenko, Juraj Gerlici, Alyona Lovska, Vasyl Ravlyuk

Communications - Scientific Letters of the University of Zilina 2025, 27(2):B109-B117 | DOI: 10.26552/com.C.2025.027  

The article highlights is determination of the main strength indicators of the modernized brake lever transmission for a wagon bogie. The special feature of this modernization is that the technological pin-hole in the strut is displaced by 112 ± 2 mm towards the bolster beam, i.e., in line with the pendulum joints. This helps to eliminate abnormal wear of the brake pads in operation. To substantiate the proposed modernization, the strength of the brake lever transmission was calculated. It was found that the maximum equivalent stresses were 124 MPa; they occurred in the tension member. The resulting stresses did not exceed the permissible...

Enhanced Buck Converter with Universal Model for the Switched Voltage RegulatorsElectrical Engineering in Transport

Dobroslav Kováč, Irena Kováčová

Communications - Scientific Letters of the University of Zilina 2025, 27(2):C24-C35 | DOI: 10.26552/com.C.2025.026  

This article presents the enhancement and refinement of a simulation model for an integrated universal switched voltage regulator compatible with PSPICE software. The model enables users to create representations of any specific type of switched voltage regulator currently available on the market. The described regulator model is practically applied in widely used configurations of buck converters, including applications in transportation. The accuracy of the regulator model is verified by comparing the simulated waveforms of the converter to those provided in its datasheet. Additionally, the model is employed for the design and simulation analysis...

Revisiting Pcu Values of Various Vehicles in Mixed Traffic Conditions: Estimation and ComparisonCivil Engineering in Transport

Amir Ali Khan, Sachin Dass

Communications - Scientific Letters of the University of Zilina 2025, 27(2):D76-D89 | DOI: 10.26552/com.C.2025.025  

This study is an attempt to derive and to compare the Passenger Car Unit (PCU) values of vehicle types present in the stream, obtained using the Chandra's method, homogeneous coefficient method, speed-based modelling, and multiple linear regression method. Using the data collected from five sites of Sonipat City with varying traffic and geometric characteristics, it was found that Chandra's method is the best method to derive the PCU values in heterogeneous traffic conditions on divided urban roads. The PCU values obtained from Chandra's method are closer to IRC (Indian Roads Congress) code values. The PCU value of e-rickshaw was also estimated in...

Improving the Energy Efficiency of the Explosive Pulse during Drilling and Blasting Operations to Increase the Quality of Crushing and Conditions for Conveyor Delivery of Overburden Rocks in Quarries and SectionsMechanical Engineering in Transport

Tasbulat Monbolovich Igbaev, Nurlan Asylkhanovich Daniyarov, Adilbek Kazbekovich Kelisbekov, Arsen Zakirovich Akashev

Communications - Scientific Letters of the University of Zilina 2025, 27(2):B96-B108 | DOI: 10.26552/com.C.2025.024  

Widespread application of advanced transportation technologies in conditions of open-pit mining with the use of high-capacity belt conveyors is limited by the need for additional crushing of overburden rocks and minerals. Accordingly, the quality of crushing of rock mass, the output of oversize during drilling and blasting operations at quarries and open-pit operations significantly affect the possibility of using flow and cyclic-flow technologies with the use of conveyor transport. In this paper is presented a method of increasing the energy efficiency of the explosive pulse in drilling and blasting operations by means of developed gas pedal designs...