Czasopismo nowoczesnego górnictwa

ISSN 2450 – 7326 e-ISSN 2449 – 6421

Forthcoming issue

okładka czasopisma Mining
Nr 551 – 3/2022

Jan Kurek1, Tomasz Wydro2

1 Porphyry and Diabase Mines Ltd, ul. Kościuszki 10, 32-065 Krzeszowice, Poland
2 AGH University of Science and Technology, ul. Mickiewicza 30, 30-059 Kraków, Poland

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

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.

Keywords: igneous rocks, quarry, opencast mines, deposit exploitation system, blasting, works

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Piotr Kulinowski1

1 AGH University of Science and Technology, Mickiewicza 30, 30-059 Kraków, Poland

Directions for reducing the energy consumption of mining belt conveyors

Abstract: The article discusses the issue of energy savings in the operation of mining belt conveyors. Using the concept of energy consumption indicators, the directions for reducing the energy consumption of belt conveyors are presented by applying energy-efficient components, upgrading the drive system, or introducing organizational and technical changes in the conveying process.

Keywords: belt conveyors, design, calculations, industrial research, laboratory research, monitoring, operation

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Zygmunt Zuski1

1 Wieliczka Salt Mine, Park Kingi 1, 32-020 Wieliczka, Poland

New transportation route near Crystal Grottoes located in ‘Wieliczka’ Salt Mine appointed through construction of fore-shaft equipped with transportation device

Abstract: This article presents conception of fore-shaft construction between levels 2nd upper and 2nd lower equipped with hoisting device destined for materials transportation. Main aim of this venture was to create transportation way for materials used in process of protecting and maintaining crystal grottos. Currently there is no vertical connection between 2nd upper and 2nd lower level. As a result, all material transportation is being performed manually over the incline paths.Keywords: fore-shaft, construction, pit, vertical transport

Keywords: fore-shaft, construction, pit, vertical transport

Beata Borska1, Dawid Szurgacz2, Jan Gil3

1 Polska Grupa Górnicza S.A., KWK Ruda Ruch Halemba, Halembska 160, 41-711 Ruda Śląska, Poland
2 Polska Grupa Górnicza S.A., KWK ROW Ruch Chwałowice, Przewozowa 4, 44-206 Rybnik, Poland
3 Zakład Remontowo-Produkcyjny, Granitowa 132, 43-155 Bieruń, Poland

Development of a charging system ensuring the load-carrying capacity for powered roof support

Abstract: The powered roof support is the essential protection of the mining wall. Its main task is to support the roof of the wall excavation. Thus, it must resist the coal mass that has the potential to clamp the mining pit. The force with which the powered roof support acts on the roof of the excavation is called load-carrying capacity. This paper describes the problem of the load-carrying capacity of powered roof support. The charging systems have been reviewed here. The research aims to ensure that the required initial load-carrying capacity is obtained and the working load-carrying capacity is maintained. This paper presents the research results of a double-block prototype equipped with an automatic charging system. We present the results of both bench and operational testing in real conditions.

Keywords: powered roof support, hydraulic prop, load-carrying capacity, bench tests, tests under real conditions