Bezpieczeństwo Pracy i Ochrona Środowiska w Górnictwie Number 04/2022

The article presents an innovative solution of the central air-conditioning system of the Lubelski Węgiel "Bogdanka" S.A. The system is based on an central air-conditioning station and a system for the production of ice slurry (VIM) located on the surface in the Stefanów. The implemented solution sets the direction for the development of central air-conditioning systems for underground mining and solves the climatic problems of the exploitation of deep-lying deposits.

In the second half of the 18th century, coal was mined in the Upper Silesian Coal Basin using an inefficient and dangerous system of extraction galleries. In order to increase the output, the pillar system was introduced, which by the beginning of the 19th century was already used in all Silesian mines. Exploitation of the pillar system required cutting the seam with pillar galleries that ran perpendicular to the main gallery. The pillars were picked by means of shortwalls along the ascent of the seam, at a height equal to the thickness of the seam (up to 10 m), until 1951, when the regulations [11] limited it to 4 m. In order to separate from the neighbouring, already selected pillar, the roof was supported by a narrow strip of raw coal, 0.8-1.3 m wide, or by densely placed racks, the so-called organs. Initially manual: cutting, mining, loading and transporting coal, these were gradually replaced by more efficient methods. The 19th century saw the introduction of dynamite and electric igniters, pneumatic drills and percussion hammers, and pole and chain chipmakers, and in the 20th century conveyors with shock chutes, belt conveyors and scraper conveyors were introduced. The problem was ventilation of the pillar pits. The pits could be ventilated by diffusion over a length of 6-10 m, and up to 30 m in non-gas fields. Longer workings were ventilated using brazing fans or special fairings. In Silesia, pillar systems were used throughout the 19th century and into the early 20th century, and in some mines as late as the 1960s. In the middle of the 20th century, the pillar-and-shortwalls system was replaced by the longwall system.

Today’s drilling contractors demand rig manufacturers to design drilling equipment with an emphasis on safety and the environment while improving performance, reducing non-productive time and operational costs. Drillmec brings it all together in one drilling rig - the HH220 series. Compared with conventional drilling rigs of equal power and capability, the HH220 series rigs create a smaller footprint reducing environmental impact, making rigging up a simpler task and strongly reducing manual handling. Measurements of noise at workstations related to HH220 FA-EU drilling rig and measurement and evaluation of human exposure to hand-transmitted vibration show, that the final results meet applicable Polish standards.