Terminologia Mineração Subterrânea

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TRABALHO DE TERMINOLOGIA EM LAVRA DE MINA SUBTERRÂNEA

Aluno: Esthefanie Mendes Melo

Professor: José Margarida da Silva

Ouro Preto, julho de 2021

[ING] draw zone <n>

{SIN} zones of draw

{DOC} The size and shape of the draw cone or draw zone in a given case will depend on the nature of the ore and the degree of fragmentation produced.

{REFBIBLI} Brady, B. H., & Brown, E. T. Rock mechanics: for underground mining. Springer science & business media. (1993).

{DOC2} In draw zones, the bulk density is decreased due to greater porosity.

{REFBIBLI} Castro, R. et al. Experimental quantification of vertical stresses during gravity flow in block caving. International Journal of Rock Mechanics and Mining Sciences, 127, p.104237. (2020). Disponível: https:// https://www.sciencedirect.com/; acesso em: 12/07/2021.

{DOC3}In the movement zone (or draw zone), porosity increases and vertical stresses decrease due to flow, while in the stagnant zone (or non-draw zone) vertical stresses increase.

{REFBIBLI} Brady, B. H., & Brown, E. T. Rock mechanics: for underground mining. Springer science & business media. (1993).

{DEF} Involved is the gravity-flow ellipse or ellipsoid referred to earlier in Sublevel Caving, modified by the inflow of waste as the caving funnel progresses upward into the capping. In block caving, this is termed the zone of draw.

{REFBIBLI} Hartman, H. L., & Mutmansky, J. M. Introductory Mining Engineering. (1987).

[POR] zona de extração <s>

{DOC} O tamanho e a forma do cone de extração ou zona de extração em um determinado caso dependerá da natureza do minério e do grau de fragmentação produzido.

{REFBIBLI} Brady, B. H., & Brown, E. T. Rock mechanics: for underground mining. Springer science & business media. (1993). <trad>

{DOC2} Na zona de movimento (ou zona de extração), a porosidade aumenta e as tensões verticais diminuem devido ao fluxo, enquanto na zona de estagnação (ou zona de não tração) as tensões verticais aumentam.

{REFBIBLI} Brady, B. H., & Brown, E. T. Rock mechanics: for underground mining. Springer science & business media. (1993). <trad>

{DEF} Envolvida está a elipse ou elipsóide de fluxo por gravidade, modificada pelo influxo de resíduos à medida que o funil de abatimento progride para cima até o nivelamento. Na escavação de blocos, isso é denominado zona de extração.

{REFBIBLI} Hartman, H. L., & Mutmansky, J. M. Introductory Mining Engineering. (1987). <trad>

{DEFPROP} Elipse ou elipsóide de fluxo gravitacional formada pelo funil de abatimento até o nivelamento, cujo formato depende da natureza do minério e do grau de fragmentação produzido.

{REFBIBLI} adaptado de Brady (1993) e de Hartman (1987).

{PESQ} EMM

{DATA} 12/07/2021.

[ING] dykes <n>

{DOC} The dykes are actually dyke systems or groups of en echelon to anastomosing, interwoven lenses which pinch and swell along strike.

{REFBIBLI} Gurney, J. J., & Kirkley, M. B. Kimberlite dyke mining in South Africa. Africa Geoscience Review, p. 191-201. (1996). Disponível em: https://www.researchgate.net/; acesso em: 15/07/2021.

{DOC2} Ore bodies can be associated with simple, composite, or multiple intrusions associated with dykes and breccia pipes.

{REFBIBLI} Darling, P. SME mining engineering handbook (Vol. 1). (2011).

{DEF} Dykes are long, narrow intrusions of generally fine-grained igneous rock with steep or vertical and approximately parallel sides.

{REFBIBLI} Brady, B. H., & Brown, E. T. Rock mechanics: for underground mining. Springer science & business media. (1993).

[POR] diques <s>

{DOC} Os diques são, na verdade, sistemas de diques ou grupos de estruturas dentro da rocha, causadas por cisalhamento não coaxial, que se bifurcam de forma aleatória e entrelaçada que comprimem e incham ao longo da direção do plano.

{REFBIBLI} Gurney, J. J., & Kirkley, M. B. Kimberlite dyke mining in South Africa. Africa Geoscience Review, p. 191-201. (1996). Disponível em: https://www.researchgate.net/; <trad>

{DOC2} Os corpos de minério podem ser associados a intrusões simples, compostas ou múltiplas, associadas a diques e veios de brecha.

{REFBIBLI} Darling, P. SME mining engineering handbook (Vol. 1). (2011). <trad>

{DEF} Os diques são intrusões longas e estreitas de rocha ígnea geralmente de granulação fina com lados íngremes ou verticais e aproximadamente paralelos.

{REFBIBLI} Brady, B. H., & Brown, E. T. Rock mechanics: for underground mining. Springer science & business media. (1993). <trad>

{DEFPROP} Intrusões longas e estreitas de rocha ígnea com lados íngremes ou verticais e aproximadamente paralelos, com presença ou não de corpo de minério.

{REFBIBLI} adaptado de Brady (1993) e de Darling (2011).

{PESQ} EMM

{DATA} 15/07/2021.

[ING] fine-grained <n>

{DOC} For fine-grained soils, their relatively low permeability is such that significant buildup of excess pore water pressure is expected to occur during the loading and unloading operations associated with construction.

{REFBIBLI} Darling, P. SME mining engineering handbook (Vol. 1). (2011).

{DOC2} Fine-grained suspension is often used in the presence of increased temperature occurring mainly in abandoned caving but also in current excavations.

{REFBIBLI} Pomykała, R. et al. The temperature influence on the properties of the fine-grained suspension used in underground workings. Archives of Mining Sciences, p. 1053-1070. (2015). Disponível em: https://infona.pl/; acesso em: 15/07/2021.

{DOC3} Consequently, while the identification and classification of coarse-grained materials is usually relatively simple through the establishment of arbitrary particle size thresholds, the use of a texture yardstick loses its predictive ability for fine-grained soils, as well as in the fine fractions of the coarse-grained ones, where plasticity becomes the dominant factor.