Improvement of Run-through Air Reverse Circulation DTH Continuous Coring Hammer and the Test Effects
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North China Geological Exploration Bureau,North China Geological Exploration Bureau,North China Geological Exploration Bureau,College of Construction Engineering

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    Abstract:

    Continuous coring technology by run-through air reverse circulation DTH hammer is mainly applied in the geological drilling in dry or water-deficient areas. In order to learn the universal applicability of this technology, a series of experiments were conducted in a water abundant mining area, by local transformation of the hammer and drill pipe, the major problems of drilling, coring and water control were solved.

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History
  • Received:March 25,2014
  • Revised:June 05,2014
  • Adopted:June 05,2014
  • Online: July 28,2014
  • Published: