Combination of various laboratory tests to investigate rock burst

Gottsbacher, L. (Speaker)

Activity: Talk or presentationTalk at conference or symposiumScience to science

Description

The failure hazard rock burst is very dangerous as it can occur very suddenly and violently. Due to the fact, that tunnel and mining projects are in deeper areas than ever, the im-portance of investigating this hazard is more relevant than ever.
The Graz University of Technology and the University of Salzburg are investigating rock burst with different laboratory test to learn more about it. The test methods are uniaxial compression tests, acoustic emission tests, micro computed tomography and object based image analysis of thin sections of rock samples.
To simulate the high stress state of rock that is prone to rock burst, stress close to the failure stress is applied on the rock samples. Simultaneously, the acoustic emissions in the sample are measured to investigate acoustic events in the sample, which are generated by micro cracks. Af-ter that, μCT-scans of the loaded samples are performed to create 3D images of the micro-cracks in the rock sample. Subsequently thin sections are made from the samples for an object based image analysis.
To evaluate the results various methods are used, from newly developed MATLAB codes to pattern recognition software to analyze the data. The findings allow a better understanding of the underlying mechanism of rock burst and indicate the usefulness of various testing methods to investigate the hazard.
Period13 Sep 2019 - 18 Sep 2019
Held at14th International Congress on Rock Mechanics and Rock Engineering
Event typeConference
LocationFoz do Iguassu, Brazil

Keywords

  • Rock Burst
  • Tunnelbau
  • Laborversuche
  • µCT
  • Acoustic Emission