Static vertical pendulum – apparatus for in-situ relative stress measurement

0356175 - ÚSMH 2011 RIV GB eng C - Conference Paper (international conference)
Neumann, L. - Kalenda, Pavel
Static vertical pendulum – apparatus for in-situ relative stress measurement.
Rock stress and earthquakes. London: Taylor and Francis, 2010 - (Xie, F.), s. 255-261. ISBN 978-0-415-60165-8.
[International Symposium on In-situ Rock Stress (ISRSV) /5./. Beijing (CN), 25.08.2010-27.08.2010]
Institutional research plan: CEZ:AV0Z30460519
Keywords : stress * earthquake prediction
Subject RIV: DC - Siesmology, Volcanology, Earth Structure

Static vertical pendulums have been installed in mines and caves in Central Europe since 2007. The two dimensional optical measurement of tilt of rock mass and continuous full digital on-line evaluation of results makes possible to detect small tilt of the surroundings with resolution of tens of nanoradians or deformation of the surroundings in the horizontal plane with resolution of hundereds nanometers. The paper will describe the measurement device, measurement method, observed effects and theirs evaluation.
Permanent Link: http://hdl.handle.net/11104/0194768