Monitoring and Assessment of Remedial Measures in Closed Open Cast Mine
Open image in new window The excavated open cast mine Chabarovice, particularly the part of it with local name Rabenov, has been investigated and monitored by the Czech Technical University since 1998 because of problems connected with different types of instabilities. Complicated geotechnical conditions, extreme heterogeneity and artesian ground water of the origin site together with the conditions modified by open cast mining were the main reasons of land sliding. Stability analyses made by the Department of Geotechnics were focused on final slopes of the mine together with the supporting waste dump and they were based on analyses of 3-D deformation monitoring in instrumented boreholes and pore water pressure sensing. The Department has contributed to development of several types of remedial measures as drainage works, re-shaping, stabilizing embankment assessment, discontinuous anchored pile wall. The group of experts of the Department was asked to provide risk analysis of the final version of the design of the measures of the last but not stable Rabenov part of the mine. The results of the monitoring with results of analyses will be presented in the paper. Development of displacements on the site demonstrated partly different behavior than expected at the design stage and it approved concerns stated in our risk analysis. These events are described and discussed in the paper. There were successfully tested different applications of fiber optics deformation monitoring developed in before research and development projects, there. Continuous high resolution fiber optic monitoring system was modified for a new research focused on a group of churches in eastern Bohemia.
KeywordsLandslide Slope stability Mining Monitoring Risk analysis
The authors would like to thank the Czech Ministry of Culture of the Czech Republic for funding of research projects DG16P02R049 “Evaluation of stability and technical conditions of the Broumov group of churches and proposal of remediation of this unique Europe culture heritage”. The paper was prepared and based on the support of this research project.
- Adam Z (2008) Study of waste dump stability during remedial works. Master thesis, tutor J. Zalesky, Czech Technical University in Prague, Faculty of Civil Engineering, p 85 + appendices (in Czech)Google Scholar
- Klecek M (1967) Geological conditions of area between Usti nad Labem, Roudníky and Stadice, Charles University, Faculty of Natural Sciences (Diploma thesis), PragueGoogle Scholar
- mapy.cz (2006) https://www.mapy.cz/. 12 June 2006
- Palivovy kombinat Usti (2016) Chabarovice, historie. http://www.pku.cz/lokality/chabarovice/. 29 Aug 2016
- Prochazka J, Zalesky J, Jirikovsky T, Salak J (2010) Long-term stability monitoring in the Prague Castle Area. Acta Geodynamica et Geomaterialia 7(4):411–429. ISSN:1214-9705Google Scholar
- Rous V, Palivovy kombinat Usti (2015) http://www.pku.cz/wp-content/uploads/2015/11/. 29 Aug 2016
- Zalesky J, Pruska J, Lamboj L, Bohadlova M, Zalesky M (2005) Risk Analysis of remedial measures design of stability protection of unstable Rabenov site, Czech Technical University, Faculty of Civil Engineering, Department of Geotechnics, Final Report (in Czech)Google Scholar
- Zalesky J, Schroefel J, Pruska J, Salak J (2004) Site investigation for unstable slope instrumentation and assessment In: Proceedings of geotechnical and geophysical site characterization of the 2nd international conference on site characterization ISC’2, Porto, Portugal, vol 2, 19–22 Sept 2004. Millpress Science Publishers, Rotterdam, pp 1225–1230. ISBN:90 5966 006 9Google Scholar
- Zalesky M, Zalesky J, Kuklik P, Hanek P (2008) Monitoring of a large slide and slope reclamation in a former Open-Pit Mine. In: 13th FIG international symposium on deformation measurements and analysis and 4th IAG symposium on geodesy for geotechnical and structural engineering, Lisbon, 12–15 May 2008Google Scholar
- Zalesky J, Kos J, Kozel M, Zalesky M (2011) From site instrumentation to reversed stability analysis. In: Proceedings of 8th international symposium on field measurements in geomechanics, USB memory stick, Berlin, GermanyGoogle Scholar
- Zalesky J, Zalesky M, Sasek L, Capova K (2015) Fiber optics applied for slope movements monitoring. In: Proceedings of the XVI ECSMGE 2015, geotechnical engineering for infrastructure and development. ICE Publishing, London, pp 1699–1704. ISBN:978-0-7277-6067-8Google Scholar