- Tytuł:
- Optimal support design for galleries located in poor quality rock mass and under the influence of mining works
- Autorzy:
-
Vazquez-Silva, Daniel
Prendes-Gero, Maria-Belen
Álvarez-Fernández, Martina-Inmaculada
González-Nicieza, Celestino
Laín-Huerta, Carlos
López-Gayarre, Fernando - Powiązania:
- https://bibliotekanauki.pl/articles/1853849.pdf
- Data publikacji:
- 2020
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
beton natryskowy
śruba
łuk stalowy
support design
back analysis
numerical implementation
bolt
shotcrete
yieldable steel arch - Opis:
- In this work, the sup port of two general galleries located in poor quality rock mass and subjected to the influence of high thickness coal layer exploitations is designed and optimized. The process is carried out in four phases:A first preliminary support is defined employing different geomechanical classifications and applying the New Austrian Tunnelling Method (NATM) using bolts and shotcrete.An instrumentation campaign is carried out with the goal of analysing the behaviour of the support. The study noticed the failure of the support due to the time of placement of the different elements.A back-analysis using the Flac and Phases software has allowed the evaluation of the properties of the rock mass and the support, the study of the influence of the time of placement on the component elements (bolts and shotcrete), and the redefinition of that support.Subsequently, a new support is designed and optimized through numerical modeling after the start of mining without experience in these sizes of sublevel caving that caused the failure of the previously designed support. The new support is formed by yieldable steel arches that are more suitable to withstand the stresses generated by nearby mining work.
- Źródło:
-
Archives of Mining Sciences; 2020, 65, 4; 851-867
0860-7001 - Pojawia się w:
- Archives of Mining Sciences
- Dostawca treści:
- Biblioteka Nauki
Artykuł