Browsing by Subject "salt exploitation"

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Access status: Open Access ,
Zaciskanie konturu typowej komory prostopadłościennej w Kopalni Soli Kłodawa
(Wydawnictwa AGH, 2009) Marcola-Sadowska, Jolanta; Bieniasz, Józef; Wojnar, Waldemar
For over 30 years Chemkop has researched convergence survey in Polish salt mines. In 1998 in one of typical salt chamber in Kłodawa installed unique measuring points system for convergence observation of vertical cross-section on 630 m depth. For 11 years measured multiple horizontal, vertical and oblique bases and levelled bench-marks. This measurements allowed determine relative velocity of area convergence about 1 per mille annually.
Access status: Open Access ,
Zaciskanie wyrobisk na dużych głębokościach w górotworze solnym
(Wydawnictwa AGH, 2011) Bieniasz, Józef; Wojnar, Waldemar; Sadowski, Andrzej; Wrzosek, Joanna
Measurements of the natural convergence of salt excavation at large depth exceeding 900 meters are conducted for 20 years by OBR Chemkop in Polkowice-Sieroszowice. In 2009 and 2010 the range of measurements increased to a dozen or so new stations. A long term observation of the excavation points revealed characteristic phases of the convergence phenomenon. In the first years of the salt excavations existence, values of linear convergence ranged from -100 mm/year to more than -600 mm/year. However, for excavations older than ten years, average speed of convergence varied from -30 mm/year to -100 mm/year. This is a typical graph of deformation for excavations on great depth in salt deposit.