Evaluación del sostenimiento por calidad de roca en labores permanentes del nivel 1170 Sur en la mina “Fruta del Norte”, Yantzaza-Zamora Chinchipe.
The present Integrated Curriculum Work titled "Assessment of Rock Quality Support in Permanent Works at Level 1170 South in the 'Fruta del Norte' Mine, Yantzaza - Zamora Chinchipe," was developed through a comprehensive study of the support system implemented throughout the south...
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| Format: | bachelorThesis |
| Idioma: | spa |
| Publicat: |
2025
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| Matèries: | |
| Accés en línia: | https://dspace.unl.edu.ec/jspui/handle/123456789/31788 |
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Afegir etiqueta | Sumari: | The present Integrated Curriculum Work titled "Assessment of Rock Quality Support in Permanent Works at Level 1170 South in the 'Fruta del Norte' Mine, Yantzaza - Zamora Chinchipe," was developed through a comprehensive study of the support system implemented throughout the southern section of Level 1170, which spans a total length of 1218.20 m. A geomechanical classification was conducted at the study level based on the RMR indices established by Bieniawski (1989) and the Q index proposed by Barton. Utilizing these indices, the quality of the rock mass was assessed, revealing that 64% is classified as good quality rock (I), while 31% is categorized as medium or fair quality rock (II), and 5% corresponds to poor quality rock (III). Based on the rock type, an appropriate support system was established to ensure safe underground mining operations. The support system at this level is characterized by permanent support elements, including anchor bolts, welded mesh, and shotcrete. To verify the effectiveness of the support installed along Level 1170 South, a series of quality control tests, known as QA/QC tests, were conducted. These tests encompass a range of operations, procedures, and trials aimed at ensuring that the quality and reliability of the support elements used in mining operations comply with the technical specifications established during the design and planning phase of each support system. Additionally, these tests ensure adherence to international technical standards during installation procedures. Among the tests performed is the "Pull Test," which determines the maximum load an anchor bolt can withstand; in this study, a minimum load capacity of 12 tons is specified. Furthermore, a "shotcrete thickness control test" is conducted to ensure the durability of the support in internal workings. The significance of support systems lies in their contribution to worker safety, excavation stability, production optimization, cost reduction, and compliance with local and international regulations. Keywords: geomechanical classification, rock quality, support, anchor bolt, welded mesh, shotcrete, QA/QC tests. Keywords: geomechanical classification, rock quality, support, anchor bolt, electrowelded mesh, shotcrete, QA/QC tests. |
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