KWK Pniówek Pniówek · Województwo śląskie · Poland

The area now occupied by KWK "Pniówek" has a long connection with coal. Surface coal extraction is recorded here from 1803, and towards the end of the nineteenth century the Coal Organisation of the Duke of Pszczyna held mining rights over the territory. Prospecting boreholes were drilled between 1890 and 1909, and even before the First World War the Duke's organisation was planning a mine at the site, though those plans were not realised. From 1956, with the expansion of the Rybnik Coal District, intensive geological borehole prospecting resumed and continued with varying intensity until 1981.

The construction of a modern mine was formally sanctioned by the deputy prime minister on the basis of a design developed in 1963, and preliminary development work began in the second quarter of that year. However, work was suspended in February 1964 due to restrictions on mining investment linked to the then-current theory of an impending decline in coal demand. The project was revisited in 1966, when a ministerial team developed a new conceptual design for a single-level mine with a target output of 15,000 tonnes per day. This concept was adopted by the College of the Ministry of Mines and Energy in 1967. After 27 additional boreholes were drilled in the Krzyzowice field and geological documentation was prepared in 1968, a decision to proceed was taken in 1970. A new mining area named Krzyzowice I was established and shaft sinking began. The foundation ceremony for the construction of KWK "Pniówek" took place on 12 July 1971. Development of drifts at the 580 m and 705 m levels began in 1972. The mine was constructed on a shortened cycle using the slide-on technique for previously assembled structures, including shaft towers. Construction was described as the most important investment in Polish coal mining in the period 1966–1974.

In August 1974, extraction of seam 359/1 in longwall S-1 began, and mining of seams 359/3 and 360/1 followed in 1975. The mine was officially inaugurated during Barbórka ceremonies on 4 December 1974, at which time it still bore its original name KWK XXX-lecia PRL, known colloquially as the "supermine" or "seventh wonder." The mine's field lies 87.1 percent within the municipality of Pawłowice and 12.9 percent within the city of Jastrzębie-Zdrój. It was assigned to successive administrative groupings: the Rybnickie Zjednoczenie Przemysłu Węglowego (1945–1982), the Zrzeszenie Kopalń Węgla Kamiennego w Jastrzębiu-Zdroju (1982–1984), the Rybnicko-Jastrzębskie Gwarectwo Węglowe (1984–1988), and the Przedsiębiorstwo Eksploatacji Węgla "Południe" (1989–1990). On 1 April 1993 the mine joined the newly formed Jastrzębska Spółka Węglowa S.A. (JSW). In 1993 the mine also acquired its current name, KWK "Pniówek," derived from the nearby village of Pniówek.

The mine produces coking coal of type 35.1 (orthocoke), predominantly hard coking coal types 35.1 and 35.2, which account for approximately 74 percent of resources. Sixty-two seams have been documented, of which 24 are classified as industrial. Seam thicknesses range from 0.7 to 6.5 metres. In December 2006 the mine celebrated the extraction of its 100 millionth tonne of coal. Employment stood at 5,362 persons at the end of 2011. The mine operates at a high level of natural hazards, classified at the fourth category for methane risk, and also subject to water, rockburst, dust, fire, and methane-and-rock outburst hazards.

From 2008, expansion works began to incorporate the adjacent Pawłowice 1 deposit. On 21 June 2012, the Minister of the Environment granted JSW a licence to extract coal and associated methane from the Pawłowice 1 deposit to a depth of 1,140 m, with the licence extended to 31 December 2051. The mine now operates across two deposits: Pniówek and Pawłowice 1, both extending to 1,300 metres depth. Coal resources in both deposits as at 31 December 2023 were recorded at 1,523,782 thousand tonnes in total, with 217,695 thousand tonnes of economic reserves and 127,052 thousand tonnes of recoverable reserves. Average daily output was reported at 11,200 tonnes in 2013. The mine has five shafts, three on the main site and two peripheral. The main shaft named Ludwik serves hoisting functions. Shaft III, with a diameter of 7.5 metres, serves exhaust ventilation and material transport; it was deepened from 856 to 1,053 metres in a project carried out between July 2020 and November 2024 by a consortium of Przedsiębiorstwo Budowy Szybów S.A. and PPG ROW-JAS, creating a new working level at 1,000 metres. Shaft IV was also deepened, from 709 to 969 metres, in works conducted between 2017 and 2021. By the time of the 50th anniversary in December 2024, the mine had driven a total of 1,186,250 metres of roadways and extracted 153,738,657 tonnes of coal in its operational lifetime.

On 20 April 2022, at approximately 00:15, a series of methane explosions occurred at a depth of 1,000 metres in longwall N-6, seam 404/4 + 405/1. There were 42 workers in the danger zone at the time. The first explosion injured fifteen workers and a rescue operation was mounted. A second series of explosions on the night of 20–21 April caught a rescue team working on a ventilation pipeline in roadway N-12, injuring ten rescue workers. Rescue operations were suspended after further explosions and the affected zone was isolated with explosion stoppings. The disaster resulted in 16 deaths among miners and rescue workers, with 7 workers remaining behind isolation stoppings. A new 350-metre parallel roadway was driven, and the rescue and recovery operation resumed in September 2023. The bodies of five missing miners were recovered on 11 September 2023 and a sixth on 13 September. The last remaining miner was found on 21 October 2023. A commission of the Wyższy Urząd Górniczy (WUG) investigated the disaster over three years; its report, concluded in January 2025, determined that the probable ignition source was friction sparking between the cutting head of the longwall shearer and a steel support element or sandstone at the N-6/N-11 roadway intersection. Criminal investigations by the Prokuratura Okręgowa w Gliwicach were ongoing as of early 2025. By the mine's 50th anniversary in December 2024, KWK "Pniówek" continued to operate as one of JSW's most important collieries, with shaft investments and the Pawłowice 1 deposit securing its operational future to 2051.