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Eksploatacja pokładu 510 w polu S KWK „Murcki-Staszic” w warunkach występowania zagrożenia metanowego, pożarowego i tąpaniami

Kurs R., Albrecht J.

Bezpieczeństwo Pracy i Ochrona Środowiska w Górnictwie

2018

nr 9

21--26

PGG S.A. Oddział KWK „Murcki-Staszic” w Katowicach prowadzi eksploatację pokładu 510 w polu S na poziomie 900 m w warunkach współwystępowania zagrożeń naturalnych. W artykule zaprezentowano ewolucję sposobów eksploatacji pokładu kolejnymi ścianami w miarę postępu robót eksploatacyjnych i kształtowania się stanu zagrożeń naturalnych oraz doświadczeń wynikających z dokonanej eksploatacji. Ponadto przedstawiono niebezpieczne zdarzenia zaistniałe podczas prowadzonych robót eksploatacyjnych w polu S.

Since 2008, the “Murcki-Staszic” mine in Katowice has been exploring the sub-ceiling bed 510 in field S on cave-in faces at the height of up to 3.0 m. Face 9b-S situated in the northern part of the field was launched first. Since an endogenous fire broke out in the mined deposits in liquidation, the face deposits and a part of the pits used for the next face were embanked, and the field was reassigned to two other fields: 8b-S and 10b-S. Based on the experiences gathered for face 9b-S, a series of additional solutions was designed for face 8b-S of approx. 160 m in total length. Their goal was to limit any imminent natural threats, with primary focus on fire threat. However, since the beginning of its mining, it was methane threat that has proven dominant for face 8b-S. For this reason, all mining operations on the wall needed to be stopped and additional preventive measures were applied. These consisted in restricting access to the face, increasing methane exhaust capacities, introducing auxiliary ventilation devices in the vicinity of its intersection with the ventilation drift, and intensifying the sludging of mining batches with an ash and water mix. These measures have limited the prevalent methane threat. The next face (2b-S) of approximately 240 m in total length was aired using the “U” method in the initial course. Based on earlier experiences, additional drift pits were created in its course. After about 280 m, this enabled the face to be mined and aired using the “Y” method. In consequence, the methods of mining the 3rd layer in deposit 510 in field S was changed in that the lengths of successive faces were reduced (the number of faces was increased for the field from the planned 9 to 13) and the overlaying pits were demethanized (inclined demethanization drifts) in deposit 501. Thanks to the application of this demethanization method, the methane threat was significantly reduced on the next face: 12b-S, thus contributing to its safer and more effective mining. At the turn of 2016 and 2017, mining was commenced for deposit 510 on face 3b-S in the southern part of field S. However, this operation was grossly affected by the imminent rick burst threat. Despite the preventive measures applied (restricted daily progress, shock and loosening bursts in the deposits, torpedo bursts targeted at the ceiling), high-energy rock mass vibrations impacted the near-face pit, rapidly increasing the carbon oxide contents in the vicinity of the face after one of the shocks, forcing the construction insulation of the face area in the form of anti-explosive plugs.

Improved analytical procedure for the measurements of selected biogenic polyamines by HPLC following dabsyl derivatisation in brain tissue

Głód B. K., Albrecht J., Hilgier W., Strosznajder J.

Chemia Analityczna

2000

Vol. 45, No. 1

27-33

We present two improvements of a routine method of analysis of biogenic polyamines after their derivatisation with dabsyl chloride. The use of borate buffer during dabvsylation offers much better reproducibility then bicarbonate one. Also trichloracetic acid extrac-tion of polyamines from biological samples was found to be superior to perchloric acid extraction. Our studies eliminate the possibility to determine together biogenic polya-mines and aminoacids using common extraction procedure.

Przedstawiono dwa udoskonalenia rutynowej metody analizy poliamin biogennych po uzyskaniu pochodnych za pomocą chlorku dabsylu. Stwierdzono, że podczas dabsy-lowania odtwarzalność metody jest lepsza przy zastosowaniu buforu boranowego niż w przypadku buforu wodorowęglanowego. Również zastosowanie kwasu trichlorooctowego do ekstrakcji poliamin z próbek biologicznych okazało się korzystniejsze niż w przypadku ekstrakcji kwasem nadchlorowym. Badania nasze eliminują wspólne ozna-czenie aminokwasów i poliamin biogennych przy użyciu rutynowych metod.