| Autor: |
Kortnik, Jože, Nwaubani, Sunny, Kos, Andrej |
| Jazyk: |
angličtina |
| Rok vydání: |
2018 |
| Předmět: |
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| Zdroj: |
Acta geotechnica Slovenica, vol. 11, no. 1, pp. 41-48, 2014. |
| ISSN: |
1854-0171 |
| Popis: |
In underground Lipica II. quarry for the excavation of natural stone, a modified room-and-pillar mining method is used, that is adjusted to the conditions of the site. In order to support and ensure the stability of underground chambers high safety pillars (HSP) are used. These pillars are made of surrounding stone and therefore intersected by discontinuities. The discontinuities represent high risk to the stability of underground facilities and workmen below/ itself. To ensure their safety the stress and strain parameters in height safety pillars are continuously monitored using two vibrating wire (WV) stressmeters inside the high safety pillars and two EL (Electronic level) beam sensors on the surface of the high safety pillar VS3. In the time period October 2010/June 2012 absolute max. measured deviation with EL beam sensors were D1=0.9 mm and D2=1.1 mm, which does not compromise the stability of the high safety pillar VS3. This paper presents the procedures of wedges deformation monitoring in safety pillars with EL beam sensors in the Lipica II underground natural stone quarry. Podzemno pridobivanje blokov naravnega kamna v kamnolomu Lipica II. poteka po nahajališču prilagojeni komorno – stebrni odkopni metodi. Za podpiranje in zagotavljanje stabilnosti podzemnih prostorov se uporablja samonosilna kamnina v obliki visokih varnostnih stebrov. Visoke varnostne stebre sekajo številne diskontinuitete, ki lahko predstavljajo različna tveganja pri zagotavljanju stabilnosti podzemnih prostorov in izvajanju del na podzemnih deloviščih. Za zagotavljanje varnosti se izvaja monitoring napetostnih in deformacijskih parametrov visokih varnostnih stebrov z uporabo (WV) napetostnih merilnih celic, vgrajenih v notranjosti in EL paličnimi merilci deformacij, vgrajenimi na površini varnostnih stebrov. V članku so podrobneje predstavljeni postopki in rezultati izvajanja monitoringa potencialnih klinov v visokih varnostnih stebrih z EL paličnimi merilci pri podzemnem pridobivanju blokov naravnega kamna v kamnolomu Lipica II. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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