Contour blasting design for tunnel excavations

Authors

  • Yoandro Diéguez-García Mining Departament. High Institute of Mining and Metallurgy
  • José Otaño-Noguel Mining Departament. High Institute of Mining and Metallurgy
  • Gilberto Sargentón-Romero Holguin University

Keywords:

Contour blasting, blasting design, explosion in tunnels, explosive substance, detonating cord.

Abstract

The contour blasting design for section II of the Levisa-Mayarí tunnel in the East-West transfer route was developed by implementing a novel methodology, which is based on the properties of explosive substances and their effects on a rocky massif. The calculation was completed considering decoupling the detonating cord loads in the contour drill holes and the Senatel MagnafracTM compact loads for the group of cut and stringline holes. The results were: a reduction of excess excavations in the tunnel and obtaining a cross section close to the mining area required for the project with associated significant savings of time and resources.

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Author Biography

Yoandro Diéguez-García, Mining Departament. High Institute of Mining and Metallurgy

Profesor Auxiliar del Dpto. de Minas del ISMM.

References

BOROVIKOV, V. A. & VANIAGUIN, I. F. 1974: Física de la fragmentación explosiva. IML. Instituto de Minas de San Petersburgo. 60 p.

DIÉGUEZ-GARCÍA, Y. 2013: Campo tenso–deformacional para voladuras con cordón detonante en el laboreo de túneles. Minería y Geología 29(3): 38-55.

EXSA S.A. Manual práctico de voladura. Consulta: 21 nov 2013. Disponible en: http://downloadpdfz.com/pdf/ manual-de-voladura.

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SARGENTÓN–ROMERO, G. 2007: Criterio de triturabilidad para la proyección de los cueles rectos triturantes con taladros de compensación. Minería y Geología 234): 51-67

SARGENTÓN–ROMERO, G. 2008: Criterios para el diseño de voladuras de contorno en el laboreo de excavaciones subterráneas. Tesis de doctorado. Instituto Superior Minero Metalúrgico de Moa. 91 p.

ULAEX S.A. 1999: Unión Latinoamericana de Explosivos S. A. Editorial SI-MAR S. A., 32 p.

Published

2014-09-16

How to Cite

Diéguez-García, Y., Otaño-Noguel, J., & Sargentón-Romero, G. (2014). Contour blasting design for tunnel excavations. Minería & Geología, 30(3), 49–66. Retrieved from https://revista.ismm.edu.cu/index.php/revistamg/article/view/Di%C3%A9guez

Issue

Vol. 30 No. 3 (2014): Julio-Septiembre

Section

Minas
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