Water gelatin with its safer handling features such as increased resistance to impact, shock and fire, resistance to water, and reduced fumes, was used (over two million pounds) together with ANFO (a mixture of ammonium nitrate and fuel oil) to move more than two million cubic yards of rock. The ANFO-P, was pneumatically blown in the bore holes. A minimum of one cartridge of water gel was used to prime each hole. Details are described of the operation in which wet days called for another. When holes were dry, each would be charged with at least one cartridge of Tovex 500 water gel prior to blowing the white substance into the 3.5 inch holes. A ten-foot graduated pole was used for stemming and would allow the stemmer to know when the ANFO-P reached 5.5 feet from the surface. This was the point at which dirt and drill borings were tamped on top of the charge. Wet holes were primed with at least one Tovex 500 Cartridge, then column loaded up to 5.5 feet from the surface with Tovex 500 cartridges. Hole depth ran to an average depth of 24 feet. The rock hauling operation and the procedure for the larger holes is also outlined. Midway through the operation, a change was made from the Tovex water gel that had been primed with Detaprime and a blasting cap, to a Tovex that is cap sensitive. The Trimtex-T presplitting water gel came in a tube resembling a garden water hose. Presplitting holes were drilled from 36 inches to 42 inches apart and the water gel tubes were inserted to the full depth of the hole. These were then withdrawn and cut to the correct length. A cap was then inserted in the top of the tube and the hole was tamped with 7 feet of packing.

  • Corporate Authors:

    Mid-West Records, Incorporated

    P.O. Box 766, 2537 Madison Avenue
    Kansas City, MO  United States  64141
  • Publication Date: 1974-9-11

Media Info

  • Features: Photos;
  • Pagination: 3 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00262512
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 20 1974 12:00AM