Experimental measurements of changes in rock properties in natural conditions are conducted in a field laboratory located in the former granodiorite quarry Požáry near Prosečnice in Central Bohemia. The monitored variables, and instruments, include:
- Climatic monitoring (precipitation, temperature, humidity and air pressure, wind direction and speed)
- Incoming and reflected radiation (pyranometers)
- Crack movement (induction and VW crack meters)
- Surface tension (film strain gauges)
- Rock mass moisture (apparent dielectric permittivity/capacity method)
- Rock mass temperature measured (thermocouples up to 3 m depth)
- Surface thermal properties (IR cameras)
- Apparent resistivities within the rock mass (electrical resistivity tomography - ERT)
Our ongoing research focuses on examining the impact of temperature on alterations in rock mass properties, specifically changes in stress and strain, influence of thermal shock and temperature distribution on the surface and within the rock mass. Additionally, we study the rate and distribution of moisture on both the surface and within the rock mass.
Team:
Mgr. Jan Blahůt, Ph.D.
Mgr. Ondřej Racek
MSc. Marco Loche, Ph.D.
Cooperation: Statotest, U Jezu 525/4, 460 01 Liberec, Czechia https://statotest.com/
Publications:
- Racek O, Balek J, Loche M, Vích D, Blahůt J (2023) Rock Surface Strain In Situ Monitoring Affected by Temperature Changes at the Požáry Field Lab (Czechia). Sensors 23(4): 2237. https://doi.org/10.3390/s23042237
- Racek O, Blahůt J, Hartvich F (2021) Observation of the rock slope thermal regime, coupled with crackmeter stability monitoring: initial results from three different sites in Czechia (Central Europe). Geoscientific Instrumentation, Methods and Data Systems, 10: 203-218. https://doi.org/10.5194/gi-10-203-2021
- Loche M, Scaringi G, Blahůt J, Melis MT, Funedda A, Da Pelo S, Erbì I, Deiana G, Meloni MA, Cocco F (2021) An infrared thermography approach to evaluate the strength of a rock cliff. Remote Sensing 13(7): 1265. https://doi.org/10.3390/rs13071265