Wyniki wyszukiwania - BazTech

1

Computer-aided selection of belt feeder parameters for the load and stability of its structure assessment

Krauze Krzysztof, Klempka Ryszard, Wydro Tomasz, Mucha Kamil

Production Engineering Archives

|

2025

|

Vol. 31, Iss. 3

329--334

EN

Due to their simple design, high reliability, and low energy consumption, belt feeders are a fundamental means of transporting bulk materials, particularly in continuous feeding systems. The most com monly used belt feeders are short ones, with lengths up to 40 meters and belt widths up to 1 meter. In addition to their use in underground and open-pit mining, they are widely applied in energy, metallurgy, and other industrial sectors and in transshipment ports, storage yards, and stockpiles. The proper operation of belt feeders is ensured by maintaining their structure's required stability and rigidity under specific operational conditions (installation location). It applies to feeders operating on straight stationary supports, particularly on V-type stationary and mobile supports. Various computer programs are used during the design phase of these feeders to assist and facilitate the process because, despite standard components and assemblies, belt feeders are not repeatable solutions and require multi-variant calculations. Based on a typical belt feeder, its analytical model, and dedicated software, the stability and forces acting on the supports are investigated. This software enables and facilitates the analysis of the stability and support loads of a belt feeder during its design phase or when implementing structural modifications. It may be particularly useful for current and future users introducing changes to the feeder’s structure or relocating it to a different operational site. The presented application was employed in the analysis of a belt feeder at an open-pit mine during the process of modifying its drive unit.

2

Model and analysis of rope winch operation in underground rail transport

Krauze Krzysztof, Mucha Kamil, Wydro Tomasz, Klempka Ryszard

Archives of Mining Sciences

|

2025

|

Vol. 70, no. 3

377--386

EN

The primary means of rail transport in inclined workings up to 45° are typically single- or double-drum rope winches. These winches are part of a transport system consisting of the winch itself, a rope with a diameter d and length Ll, a track system, and a return drum with a rope tensioning mechanism. A fundamental challenge in employing winches in a given working is accounting for their operational conditions, which include the route length Lu, its inclination αu, and the value of the hauled mass (weight) Gm, given a specified load transport velocity vpł. These factors influence the drive load parameters, such as the winding rope force FC, unwinding rope force FS, and drive motor power Np. Manufacturers of these devices provide their structural (Lumax), kinematic (vpj), and energy-related (Np) parameters. However, it is the responsibility of the prospective user to assess the suitability of a specific winch for the conditions present in their transport excavation. To address this need, an analytical model, algorithm, and computer program have been developed to dynamically determine the required parameters while considering the winch’s operating conditions.

3

The photogrammetric approach in conical picks wear rate evaluation

Krauze Krzysztof, Mucha Kamil, Wydro Tomasz, Pawlik Jan, Wróblewska-Pawlik Aleksandra

Production Engineering Archives

|

2023

|

Vol. 29, Iss. 4

413-420

EN

The cutting tools in mining industry are especially prone to rapid wear, since most of the rocks exhibit aggressive abrasion attributes. A typical representative of fast wearing mining end-tools is a conical pick (also known as tangential-rotary cutter). In order to decrease the premature deterioration, the manufacturers and users tend to enhance the lifespan of the tool by wide range of approaches, namely heat treatment, chemical treatment, burnishing, hard facing etc. In order to estimate the wear rate of a given pick one has to select appropriate procedure and method of evaluation. By this time, most commonly applied method is to estimate the wear rate basing on mass loss measurements of the tools being exploited with constant cutting parameters and fixed conditions. The Authors proposed also a new method of volumetric wear assessment, basing of three-dimensional photogrammetric scanning and compared the results with the outcome of traditional mass wear evaluation of the same sets of tools. Additionally, this paper contains recommendations regarding both approaches (volumetric and mass), especially focusing on the possibilities of the new method concerning measurements of the manufactured tool.

4

Computer-aided selection of the stabilising system parameters of the mobile transport and assembly manipulator in mining excavations

Krauze Krzysztof, Klempka Ryszard, Mucha Kamil, Wydro Tomasz

Archives of Mining Sciences

|

2023

|

Vol. 68, no. 1

3--18

EN

Shifting masses in a confined space in the company of other machines and devices, which limits the manoeuvring and transport area, poses a significant problem in every field of industry, especially with underground mining. The works involved in transporting and manoeuvring masses in underground workings are challenging and are most often performed using various auxiliary machines or manually. Hence the need arose to develop a device carrying out activities related to the shifting of masses with the assumed maximum value. The device was created as a result of cooperation between FAMA sp. z o.o. and the AGH University of Science and Technology in Kraków, Poland. The mining modular transport and assembly unit (MZT-M) enables assembling and transporting various masses, especially the elements of the roadway support in the face. The primary function of this device is its movement in the excavation along with the transported mass and delivering it to a specific place. Therefore, an important issue is to ensure the module’s stability in different phases of its operation (lifting, transport, manoeuvring, feeding, lowering) due to the limited space in the excavation. That is why an analytical model and specialised software were created to determine the design parameters of the device as a function of its operating phases, especially the counterweight’s mass. As previously mentioned, an analytical model (physical, mathematical) with equations and applications written in Microsoft Visual Studio and Matlab was used for this purpose. It is beneficial at the design or construction changes stage. Calculation results are documented in the form of numerical summaries and graphs.

5

The mining of igneous rocks – mining technology exemplified by the “ZALAS” Porphyry Mine

Kurek Jan, Wydro Tomasz

Mining – Informatics, Automation and Electrical Engineering

|

2022

|

R. 60, nr 3

7--13

EN

The geological structure and rock resources of the region of Krakow are very diverse. This results from its location at the junction of three structural units as well as from the variety of geological processes that have taken place during their geological history. Devonian to Quaternary formations are visible on the surface, while the rocks found in boreholes are even older. Igneous rocks in the region of Małopolska (Lesser Poland) are concentrated in a relatively small area. The following rocks have been mined in the past: red porphyry in Miękinia, melaphyre in Regulice, porphyry in Orla. Currently active mines – quarries, which are engaged in continuous exploitation, include the “Zalas” Porphyry Mine in Zalas and the “Niedźwiedzia Góra” Diabase Mine in Tenczynek.

PL

Budowa geologiczna oraz zasoby skalne okolic Krakowa są bardzo urozmaicone. Wynika to z jednej strony z położenia tego obszaru na styku trzech jednostek strukturalnych, a z drugiej strony jest spowodowane różnorodnością zachodzących w tej części Małopolski procesów geologicznych. Na powierzchni terenu ukazują się utwory powstałe w okresie od dewonu do czwartorzędu, natomiast w otworach wiertniczych stwierdzono skały jeszcze starsze. Występowanie skał magmowych w Małopolsce koncentruje się na stosunkowo małym obszarze. W przeszłości eksploatowano czerwony porfir w Miękini, melafir w Regulicach oraz porfir w miejscowości Orlej. Obecnie czynne kamieniołomy, prowadzące ciągłą eksploatację to Kopalnia Porfiru „Zalas” w miejscowości Zalas oraz Kopalnia Diabazu „Niedźwiedzia Góra” w Tenczynku.

6

Małopolskie górnictwo skał magmowych – technologia wydobycia na przykładzie Kopalni Porfiru „Zalas”

Kurek Jan, Wydro Tomasz

Mining – Informatics, Automation and Electrical Engineering

|

2022

|

R. 60, nr 3

14--20

PL

Budowa geologiczna oraz zasoby skalne okolic Krakowa są bardzo urozmaicone. Wynika to z jednej strony z położenia tego obszaru na styku trzech jednostek strukturalnych, a z drugiej strony jest spowodowane różnorodnością zachodzących w tej części Małopolski procesów geologicznych. Na powierzchni terenu ukazują się utwory powstałe w okresie od dewonu do czwartorzędu, natomiast w otworach wiertniczych stwierdzono skały jeszcze starsze. Występowanie skał magmowych w Małopolsce koncentruje się na stosunkowo małym obszarze. W przeszłości eksploatowano czerwony porfir w Miękini, melafir w Regulicach oraz porfir w miejscowości Orlej. Obecnie czynne kamieniołomy, prowadzące ciągłą eksploatację to Kopalnia Porfiru „Zalas” w miejscowości Zalas oraz Kopalnia Diabazu „Niedźwiedzia Góra” w Tenczynku.

EN

The geological structure and rock resources of the region of Krakow are very diverse. This results from its location at the junction of three structural units as well as from the variety of geological processes that have taken place during their geological history. Devonian to Quaternary formations are visible on the surface, while the rocks found in boreholes are even older. Igneous rocks in the region of Małopolska (Lesser Poland) are concentrated in a relatively small area. The following rocks have been mined in the past: red porphyry in Miękinia, melaphyre in Regulice, porphyry in Orla. Currently active mines – quarries, which are engaged in continuous exploitation, include the “Zalas” Porphyry Mine in Zalas and the “Niedźwiedzia Góra” Diabase Mine in Tenczynek.

7

Operational Tests of a Modular Installation and Transport Assembly of Steel Arch Support in Underground Excavations

Krauze Krzysztof, Mucha Kamil, Wydro Tomasz, Kutnik Andrzej, Hałas Waldemar, Ruda Piotr, Osowski Dawid

Multidisciplinary Aspects of Production Engineering

|

2021

|

Vol. 4, Iss. 1

343--354

EN

The roof support, especially the ŁP yielding steel arch support, is transported and assembled in the face with the use of auxiliary machines. This activity in Polish underground mines causes numerous problems, which until present have not been solved. Currently, transport and assembly are carried out manually, while the roadheader and suspended rail are used only to a small extent. Therefore, the modular installation and transport assembly was developed jointly by FAMA Sp. z o. o. and AGH University of Science and Technology. The solution in question enables performing a number of functions (including transport and assembly of all kinds of support arches), which are not available in currently manufactured equipment. The proposed manipulator solves numerous problems occurring during the installation of the steel arch support in an underground mining excavation and significantly improves the process of drilling galleries. This innovative solution considerably differs from the existing ones, and its greatest advantage is versatility with regard to the cross-section and equipment of the roadway, as well as a wide range of functions. In addition, it can also be used for reloading works. The modular installation and transport assembly together with a platform, a temporary mechanized roof support and a mining machine, make up a mechanizes roadheader complex, which enables continuous mining, loading and installing the permanent support in underground workings.

8

Ocena jakości noży styczno-obrotowych oraz prognozowanie ich kosztów zużycia

Krauze Krzysztof, Mucha Kamil, Wydro Tomasz

Przegląd Górniczy

|

2020

|

T. 76, nr 9

1--9

PL

W chwili obecnej wybór, przez użytkownika, noża styczno-obrotowego polega na sprecyzowaniu jego parametrów geometrycznych i materiałowych, uwzględniających miejsce i warunki jego pracy. Następnie dokonuje się wyboru, zazwyczaj na podstawie tylko jednego kryterium, jakim jest cena. Tym samym na etapie zakupu, jak i eksploatacji, nie prowadzi się oceny jakości noży i ich przydatności do konkretnej maszyny i urabianego minerału. Dlatego powstała metoda pozwalająca przeprowadzić takie badania, w których dokonuje się pomiarów parametrów geometrycznych noża, ustala się rodzaje materiałów korpusu noża i wkładki WC oraz szybkość zużycia (intensywność) na stanowisku laboratoryjnym. Szybkość zużycia (intensywność) opisana jest za pomocą wskaźnika C2, którego wartość im jest mniejsza, tym nóż wolniej się zużywa. Wskaźnik C2 został wykorzystany do prognozowania zużycia noży i określenia ich ceny jednostkowej oraz kosztów eksploatacyjnych. Pozwala to na precyzyjne określenie wymagań inwestycyjnych i prawidłowy wybór noża.

EN

Currently, the user’s choice of a conical pick involves specifying its geometric and material parameters, taking into account the place and conditions of its work. The selection is then made, usually on the basis of solely one criterion, which is the price. Thus, at the stage of both purchase and operation, the quality of picks and their suitability for a specific machine and the processed mineral are not assessed. Therefore, a method was developed to enable conducting tests that determine the geometric parameters of a pick, the types of materials of the pick body and WC insert as well as the pick wear rate (intensity) in a laboratory workstation. The wear rate (intensity) is described by the C2 index - the smaller is its value, the slower is the pick’s wear. The C2 index has been used to forecast the wear of picks and to determine their unit price and operating costs. This allows for precise determination of investment requirements and a proper selection of the pick.

9

Impact of the Winding Angle of the Auger Blade on the Loading Process With Milling Auger Drums

Wydro Tomasz

New Trends in Production Engineering

|

2020

|

Vol. 3, Iss. 1

241--250

EN

This publication addresses the impact of selected design parameters of milling auger cutting drums on the loading process, and above all the winding angle of the auger blade. The loading process is often referred to as an auxiliary process because the milling process is considered to be the dominant throughout the work of the cutting drum. The correct determination of the relationship between the mining process and the loading process allows to understand how the individual design and kinematic parameters of the mining drums and the mining machine on which they are installed affect each other. The publication discusses the problem of loading with milling cutting drums and ways to increase its efficiency. The research results of the loading process have been presented, affecting the efficiency of this process in the aspect of various angles of inclination of the auger blades. Based on the tests, conclusions have been formulated that allow for the possible selection of an appropriate winding angle for the auger blade, depending on the granulation of spoil.

10

Evaluation of the Quality of Conical Picks and the Possibility of Predicting the Costs of Their Use

Krauze Krzysztof, Mucha Kamil, Wydro Tomasz

Multidisciplinary Aspects of Production Engineering

|

2020

|

Vol. 3, Iss. 1

491--504

EN

Currently, the user’s choice of a conical pick involves specifying its geometric and material parameters, taking into account the place and conditions of its work. The selection is then made, usually on the basis of solely one criterion, which is the price. Thus, at the stage of both purchase and operation, the quality of picks and their suitability for a specific machine and the processed mineral are not assessed. Therefore, a method was developed to enable conducting tests that determine the geometric parameters of a pick, the types of materials of the pick body and WC insert as well as the pick wear rate (intensity) in a laboratory workstation. The wear rate (intensity) is described by the C2 index – the smaller is its value, the slower is the pick’s wear. The C2 index has been used to forecast the wear of picks and to determine their unit price and operating costs. This allows for precise determination of investment requirements and a proper selection of the pick.

11

Impact of selected parameters on the loading process with cutting screw heads

Wydro Tomasz

New Trends in Production Engineering

|

2019

|

Vol. 2, Iss. 1

249--256

EN

The article presents the influence of selected constructional and kinematic parameters of cutting screw heads on the loading process. The loading process is often referred to as an auxiliary process, because in the entire operation of the head the cutting process is considered dominant. Proper determination of the relationship between the cutting process and the loading process allows to understand how individual constructional and kinematic parameters of cutting heads and the cutting machine on which they are installed have an impact on each other. This knowledge gives potential users an opportunity to determine a reason for the lack of effective loading in the working conditions of a given wall. Besides construction and kinematic parameters, shielded loaders also have an impact on the loading process. The use of a shielded loader allows for improving the efficiency of the loading process, i.e. increasing the percentage of output loaded in the whole of the output transferred by the head.