OPTIMAL SUPPORT DESIGN FOR GALLERIES LOCATED IN POOR QUALITY ROCK MASS AND UNDER THE INFLUENCE OF MINING WORKS
Publicated to:Archives Of Mining Sciences. 65 (4): 851-867 - 2020-01-01 65(4), DOI: 10.24425/ams.2020.135181
Authors: Vazquez-Silva, Daniel; Prendes-Gero, Maria-Belen; Alvarez-Fernandez, Martina-Inmaculada; Gonzalez-Nicieza, Celestino; Lain-Huerta, Carlos; Lopez-Gayarre, Fernando;
Affiliations
Abstract
In this work, the support 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.
Keywords
Quality index
Bibliometric impact. Analysis of the contribution and dissemination channel
The work has been published in the journal Archives Of Mining Sciences, and although the journal is classified in the quartile Q4 (Agencia WoS (JCR)), its regional focus and specialization in Mining & Mineral Processing, give it significant recognition in a specific niche of scientific knowledge at an international level.
Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.
Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2025-06-13:
- Scopus: 4
- OpenCitations: 1