National Repository of Grey Literature 25 records found  1 - 10nextend  jump to record: Search took 0.02 seconds. 
Long-term stability of underground openings with respect to their liquidation at the small and middle uranium deposits of the Moravian Moldanubicum (Olší-Drahonín, Jasenice-Pucov)
Hájek, A. ; Konečný, Petr
Securing of the long term stability of underground openings mouthing to the surface (shaft, drifts, galleries) is the basic presumption for the successful liquidation of an exhausted deposits. The calculation of stability for such openings in small and middle deposits of uranium was realised in connection with their closing. Opening deeper then approximately 30-50 m were taken under consideration.
Amplifying the amplitude of seismic waves in overlying formations in the Karviná part of the OKR
Kaláb, Zdeněk ; Knejzlík, Jaromír
Amplification factor for maximum velocity amplitudes of seismic waves in cover layers of the Karviná part of the Upper Silesian Coal Basin.
Interaction of laser beam with rocks
Hlaváč, L. M. ; Martinec, Petr ; Jančárek, A.
Interaction between laser beam and rocks was studied. Two types of laser beam was used in experiment. Continuous laser with high power and pulsing laser with low power.
Seismic recording apparatus PCM3-EPC
Knejzlík, Jaromír
Digital seismic signal recorder was designed for application on surface three-component seismic stations established in OK Coal Basin for research of influence of mining induced seismic events on surface objects. Block diagram and main obtained parameters are described.
Using of longperiod levelling measurement on surface of the exploited uranium deposit of Rožná for mathematical modelling of surface ground subsidence
Hortvík, Karel
Negative impact on surface ground with all its implications that result in case of build-up area above deposit worked represents a concomitant effect of almost every mining activity. Therefore, prediction of development of surface ground subsidence caused in this way is very important task when moderating mining damages of undermined landscape.
Digital sources of geological data in Czech Republic for evaluation of Geohazards
Čápová, D. ; Javůrková, M. ; Kaláb, Zdeněk
Geoinformation System of the Geofond of the Czech Republic contains information concerning geological observations and phenomena that are stored in GIS databases. The system incorporates information for all areas of the CR concerning different type of basic and derived events.
Measurement of selected parameters in rock disintegration by a mechanical tools: comparison of two principles
Foldyna, Josef ; Jekl, Pavel ; Nováková, Daria ; Sitek, Libor ; Vašek, Jaroslav
Results of sandstone and trachite disintegration obtained using laboratory pressure plough at the Institute of Geonics, CAS Ostrava and cutting rig at CRN in Cagliari (Italy) are compared in the paper.
Comparison of various types of nozzles for high-speed water jet generation
Sitek, Libor ; Foldyna, Josef ; Nováková, Daria
In the paper, three different types of nozzles for high-speed water jet generation are compared. The original methodology is used for comparison that is based on combination of three independent groups of measurement.

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