Control of karsts caves safety in the Połom Limestome Quarry
1
, Poland
These authors had equal contribution to this work
Corresponding author
Zbigniew Bednarczyk
Mining, "Poltegor-Institute" Institute of Opencat Mining, Parkowa 25, 51-616, Wroclaw, Poland
Mining, "Poltegor-Institute" Institute of Opencat Mining, Parkowa 25, 51-616, Wroclaw, Poland
Mining Science 2025;32:7-29
KEYWORDS
TOPICS
Technology of deposit excavation in underground and strip miningShooting techniqueMining geomechanics and geotechnicsEnvironmental protection and waste recycling
ABSTRACT
The purpose of the study was to monitor the impact of mining on the structure of crystalline limestone caves, in the vicinity of a quarry in SW Poland. The scope of work included an analysis of the geological and geotechnical conditions and safety of the caves. The research included the application of MASW Multichannel Analysis of Surfaces Waves to determine rock voids, identification of geotechnical parameters and slope stability to 20 m depth. Short-range aerial photogrammetry was used to produce maps. Seismometers and glass plates installed near and inside the caves allowed characterization of Vs paraseismic vibration velocity, acceleration, displacement and frequency. The MASW survey determined Vs velocity and limestone strength. The 48-m long survey revealed several zones with higher values of Vs and cave with lower values of 70-90 m/s. The slope stability analysis, taking into account the results of the geophysical survey, previous research and field observations, indicates that the slope is stable. In the second part, the magnitude of vibrations was measured as a function of charge size and distance. The research was conducted to determine the parameters of safe blastings, detect the caves using MASW and minimize impact of exploitation on the caves. A methodology for monitoring of rock slopes near blasting sites was presented. In the conclusions, the geotechnical parameters and the stability of slope near the caves were characterized. It was found that the slopes are stable. It was also possible to determine the safe level of paraseismic vibration for the studied caves.
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| eISSN: | 2353-5423 |
| ISSN: | 2300-9586 |
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