Abstract
This paper presents basic mineralogical and petrological data of the rocks hosting larimar deposit from the Sierra de Bahoruco, in the SW part of the Dominican Republic. Larimar is a unique ornamental stone with a wealth of decorative qualities. The Las Filipinas Larimar Mine in Barahona Province is the only place of this type in the world. Its production and distribution require radical action; hence, the paper also provides current information on the extraction of this raw material and prospects for the future. The paper indicates the possibility of using a new adit support system based on a mixed support (arch support and shotcrete). Numerical analysis shows the need to create a shotcrete coating around the entire circumference, about 15 cm thick. The variable geotechnical situation around the excavation, caused by the planned operation, prompts the use of slightly different solutions in the field of support. The article presents an outline of the technology using Polish experience. It is a support-bolt casing system with the latest achievements in this field.
Highlights
Academic Editor: Simon DominyLarimar is a unique gemstone of the world, called Dolphin Stone, Atlantis Stone and Stefilian’s Stone
It was accidentally encountered on 22 November 1916 by Father Miguel Fuertes Domingo Lorén near the city of Barahona (Barahona Province) in the SW part of the Dominican Republic [1]
This strategy low standards of work safety, which resulted in a large number of accidents, the Dominican should take into account the objective possibilities derived from the quality and stability authorities decided to intervene and build a new tunnel, 1000 m long, which was to faciliof the rock mass, as well as the knowledge accumulated after the use of the previous extate access to the larimar deposit and improve safety conditions by improving drainage, ploitation tunnel
Summary
Larimar (lorimar) is a unique gemstone of the world, called Dolphin Stone, Atlantis Stone and Stefilian’s Stone It was accidentally encountered on 22 November 1916 by Father Miguel Fuertes Domingo Lorén near the city of Barahona (Barahona Province) in the SW part of the Dominican Republic [1]. The larimar is found within the effusive and piroclastic rocks of the Dumisseau Formation (DFm) of the Caribbean Volcanic Province [7,8,9,10] The uniqueness of this stone is the result of structural heterogeneity, mineral composition, color, physical properties and high ornamental qualities. The authors present the latest mineralogical and petrological data of rocks hosting blue pectolite mineralization, as well as the current status of the Las Filipinas Larimar Mine in Bahoruco mountain range (Barahona Province) and the potential future mining operations
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