Deformation measurements of the roof protective zone over field no. 1 in Kłodawa Salt Mine
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Keywords
mining protective zone, post-exploitation deformation, leveling, convergence and length measurements
Abstract
Roof protective zone over field no. 1 in Kłodawa is the essential unit of safety of exploitation in salt mine. Field no. 1 was exploited from 1958 to 1985 on depths from 450 m to 600 m. Levelling observations on horizon 450 over field no. 1 was begun in 1962. From 2005 levelling was modified and news observations were added. In six chambers excavations of the highest horizon 475 to start measurements of convergence. From 2010 start measurements of horizontal dislocations. On horizon 450 two deep-seated levelling marks out of border of mine influences were installed. The new levelling measurements on 2006-2010 showed to accumulate subsiding trough with speed of vertical deformations about -3 mm/year. Results of five years of convergence observation show slow, monotonous the tightening with average the vertical speed about -5 mm/year.
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References
Bieniasz J. & Wojnar W., 2011. Pomiary deformacji stropowej półki ochronnej nad polem nr 1 w Kopalni Soli Kłodawa z wykorzystaniem technik pomiarów konwergencyjnych, niwelacyjnych i długościowych. Archiwum OBR Chemkop, 1097, 3–8.
Wojnar W. & Bieniasz J., 2011. Wykonanie pomiarów konwergencji komór, fi larów i półek międzypoziomowych oraz chodników w polach eksploatacyjnych nr 1, 2, 3 i 5 Kopalni Soli Kłodawa. Archiwum OBR Chemkop, 1109, 8–12.
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