Resumo

PHILIPE, Nunes; OTANO-NOGUEL, José A.  e  WATSON-QUESADA, Roberto L.. Tensions extinction coefficient when detonating explosives in gneissic massif from Catoca mine. Min. Geol. [online]. 2021, vol.37, n.2, pp. 231-238.  Epub 30-Jun-2021. ISSN 1993-8012.

The purpose of the study was to determine the effective values ​​for tensions extinction coefficient when charges are detonated in the tension state model at massif of gneissic rocks from Catoca mine, in order to obtain the blasting passport for HEF-100 and RIOGEL KUPULA-S explosive substances. The methodology proposed by Pedro-Alexandre for the El Cacao quarry (Cuba) was used based on Borovikov and Vaniagin’s tensions extinction coefficient model. The analytical values ​​obtained from spall and cracking radium and less resistance line from values ​​between 1.35 and 1.5 of the extinction coefficient, are acceptable in a probable range for the experimental calculation of blasting passport n the rock massif for mining-technical conditions in which blasting works are carried out at Catoca mine.

Palavras-chave : extinction coefficient; tension condition; blasting charges; rock blasting; gneissic massif; Catoca mine.

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