Comparative stability analyses of traditional and selective room-and-pillar mining techniques for sub-horizontal tungsten veins
| Autor: | Vidal Félix Navarro Torres, Qiang Xie, M. Matilde Costa e Silva, Carlos Dinis Da Gama, Paula Falcão Neves |
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| Rok vydání: | 2011 |
| Předmět: |
Engineering
business.industry Mechanical Engineering Metals and Alloys Pillar chemistry.chemical_element Mineralogy Tungsten Room and pillar mining chemistry Geochemistry and Petrology Mechanics of Materials Panasqueira Metallic materials Materials Chemistry business Rock mass classification Stoping |
| Zdroj: | International Journal of Minerals, Metallurgy, and Materials. 18:1-8 |
| ISSN: | 1869-103X 1674-4799 |
| DOI: | 10.1007/s12613-011-0392-2 |
| Popis: | The stability and productivity concerning a modification on the traditional room and pillar for a new selective technique at the Portuguese Panasqueira Mine have been described. The traditional room-and-pillar stoping uses 5.0-m wide rooms with 3.0 m ×3.0 m pillars, while the selective room-and-pillar mining technique consists in stoping with rooms of 4.0 m wide and pillars of 4 m ×4 m with a subsequent selective cutting of the quartz veins at the mid pillar of approximately 0.5 m high, to obtain a pillar section with an area of 3.0 m × 3.0 m. The stability and productivity analyses indicate that the selective technique obtains smaller average pillar safety factor, more rock mass displacement, more extraction and selectivity ratios, and ore grade improvement, compared with the traditional technique. These results show that the selective technique is also more convenient. This proposed selective room-and-pillar mining technique is applicable to any sub-horizontal narrow quartz veins with wolfram, gold, etc. such as the famous La Rinconada gold mine in the Peruvian Andes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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