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Rapid excavation: significance, needs, opportunities. (1968) / Chapter Skim
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Current Constraints on Increased Underground-excavation Productivity
Pages 16-18

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
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From page 16...
... Underground excavation is the process of digging out and removing material either to form a usefid cavity beneath the earth's surface or to derive profit from the removed material. The process comprises a survey of geological conditions and rock properties, disintegration of in situ material, transportation of
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From page 17...
... The inadequacy of techiiical knowledge, principally geological and rock mechanics knowledge, now penalizes the undergroimd-excavation process in several ways. For example, the base of knowledge is insufBcient to develop geological methods needed for properly assessing, in advance of actual excava tion operations, the geological characteristics of underground rock masses (e.g., the degree of jointing, faulting, or other weaknesses of geological origin)
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From page 18...
... The base of knowledge is also insufficient to develop geological methods needed for determining the quality of rock or groundwater conditions immediately in advance of the working face. Too often, even with comparatively slow conventional excavating procedures, areas of incompetent rock or excessive groundwater are exposed without warning, and inordinate delays result.
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Key Terms

  • excavation process
  • geological conditions
  • groundwater conditions
  • geological methods
  • rock masses

  • underground rock
  • complete coordination
  • internal inducement
  • process comprises
  • perform efficiently

  • geological uncertainty
  • situ material
  • mechanics knowledge
  • environmental quality
  • excavator theflexibilityin

  • limitations require
  • ahnost tailored
  • horizontal distances
  • improving hydraulic
  • derive profit

  • hydraulic conditions
  • equipment manufacturers
  • growing concern
  • increase drastically
  • rent capability

  • sustained linear
  • closely resembles
  • excavating equipment
  • choosing excavation
  • suitable techniques


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