Czasopismo nowoczesnego górnictwa

ISSN 2450 – 7326 e-ISSN 2449 – 6421

Latest issue

JANUSZ KOŁODZIEJSKI

SALT MARKET CHARACTERISTICS IN POLAND ON THE EXAMPLE OF THE “KŁODAWA” SALT MINE

This article is a brief summary of information on the salt market in Poland. In addition it defines the economic areas in which sodium chloride is used, the sources of salt production and the forms in which it occurs – brine, evaporated salt and rock salt. General information is also given on the evaporated and rock salt producers in Poland. The market shares of individual salt producers, importers and solid salt producers and the countries that are the largest salt producers in the world are also presented. The article generally describes terms the largest rock salt producer in Poland, i.e. Kopalnia Soli “Kłodawa” S.A. The degree of detail of the information provided has been deliberately limited due to its sensi- tivity and the protection of market data.

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KRZYSZTOF SZYDŁOWSKI MICHAŁ FLASZA

THE HISTORIC “BOCHNIA” SALT MINE

The beginnings of the “Bochnia” Salt Mine date back to 1248. Over the centuries, its structure, methods of operation and purpose have all changed, with its miners being pioneers in Poland with regard to the method of extraction and the technologies used. Over hundreds of years, several shafts have been excavated, and a maze of galleries created near Bochnia, creating something like a town outside and underneath the city. Due to the depletion of the deposit and increasing costs, mining was stopped, and the last lump of salt came to the surface in 1990. Since that time the company has been making efforts to protect the natural and historical heritage by securing the workings and making them available for sightseeing by tourists.

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JAROSŁAW MALIK JAN KUCHARZ

THE CURRENT CONDITION AND FUTURE OF THE “WIELICZKA” SALT MINE

The article focuses on matters related to the operation of the “Wieliczka” Salt Mine, outlining its activity in 2021 as well as the plans for the years to come. It describes the securing and accessibility activities carried out by the company. In terms of tourism, this is being reintroduced after the pandemic restrictions. It also contains a concise synthesis of the implemented protective measures aimed to limit the natural hazards and to ensure the safety of persons who remain in the underground excavations through pro- environmental measures. The article also presents the activities of the mine for the subsequent years of its functioning.

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PIOTR URBAŃSKI ARTUR GAWLIK

ROCK SALT PRODUCTION IN O/ZG “POLKOWICE-SIEROSZOWICE” – A CASE STUDY

The first works related to the exploration of the salt deposit in O/ZG “Polkowice-Sieroszowice” took place in 1991. At that time, a number of opening-out headings to the salt deposit from the level of the copper ore level were begun. Currently, the total length of the excavations in the salt deposit is approximately 40 km. It should be noted that, depending on the function, the volume of drifts is different, which results from the dimensions of individual excavations. The total volume of drifts in the salt deposit is estimated to be approximately 2.5 million m3. In the Sieroszowice mining area, salt occurs at a depth of 950 m above sea level. In November 2013, the mine obtained a license to extract rock salt from the “Bądzów” deposit (50 years). Part of the mining activities in the salt deposit are performed mechanically in a chamber system with the use of roadheaders. The applied technology for deposit extraction requires the meth- odology of headings mining. These headings (chambers) are made in layers, from top to bottom. The target transverse dimensions of the chambers are 15 m × 15 m (width × height) in a variety of lengths. Chambers are separated by inter-chamber pillars 20 m wide. which should ensure the stability of the chambers and the pillars themselves. The remaining works consist of drifts driving with dimensions 7 m × 5 m (width × height). The mining works carried out so far take place more or less in the middle part of the deposit (understood in terms of thickness), and the excavations created as a result of these works are located in salts with various geomechanical parameters.

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