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

Identyfikatory

DOI

10.24425/ams.2020.135181

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

support design; back analysis; numerical implementation; bolt; shotcrete; yieldable steel arch

PL

beton natryskowy; śruba; łuk stalowy

• Wydawca: Instytut Mechaniki Górotworu PAN
• Czasopismo: Archives of Mining Sciences
• Rocznik: 2020
• Tom: Vol. 65, no. 4
• Strony: 851--867
• Opis fizyczny: Bibliogr. 26 poz., rys., tab., wykr.

Twórcy

autor

Vazquez-Silva Daniel

• University of León, Campus De Vegazana, S/N, 24071 León, Spain

autor

Prendes-Gero Maria-Belen

• University of Oviedo, Construction and Manufacturing Engineering, Spain

autor

Álvarez-Fernández Martina-Inmaculada

• University of Oviedo, Exploitation and Prospecting Mines, Spain

autor

González-Nicieza Celestino

• University of Oviedo, Exploitation and Prospecting Mines, Spain

autor

Laín-Huerta Carlos

• Polytechnic University of Madrid, 28040 Madrid, Spain

autor

López-Gayarre Fernando

• University of Oviedo, Construction and Manufacturing Engineering, Spain

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021)