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Soft-ground boring tools
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
Drilling tools used in soft ground such as overburden, clay, soft shale, etc. diamond-drilling terms 83
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Overburden, английский
- Вскрышной слой (поверхностный слой грунта, удаляемый перед открытой добычей угля)
- Перегружать
- Clay, sand, boulder clay, and other un-consolidated materials overlying bedrock. also called burden, cover, drift, mantle, surface.
- The worthless material covering a body of useful mineral.
- Вскрышной слой грунта; вскрышная порода; перегрузка, чрезмерная нагрузка
- (a) the upper part of a sedimentary deposit, compressing and consolidating the materials below. (b) the loose soil or other unconsolidated material overlying bedrock, either transported or formed in place (synonym for regolith). gg
- Overlying rock, or soil.
- The soil and rock supported by the roof of a tunnel.
- Вскрыша
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Tension drilling, английский
Drilling with part of the weight of the drill string supported by the drill swivel head or suspended on a drilling line, as opposed to drilling with the entire weight of the string imposed on the bit.
Drill time, английский
Drilling time. amount of time, expressed in hours per shift or percent of shift time, that bit is on bottom and drilling.
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