PRESPLITTING ROCK SLOPES FOR HIGHWAYS

THE PRESPLITTING METHOD OF PRODUCING A PLANE OF SPLIT ROCK ALONG THE FACE OF THE SLOPE PRIOR TO ANY PRIMARY DRILLING OR BLASTING IS DESCRIBED. THIS SHEARED AREA FROM HOLE TO HOLE ALONG SLOPE LINE MAY BE FORMED FOR THE ENTIRE DEPTH OF THE CUT, OR IF THE CUT IS TOO DEEP THE PLANE IS MADE TO A PREDETERMINED BENCH LEVEL AND REPEATED IN LIFTS OF OF TWENTY TO THIRTY FEET. PRESPLITTING IS ACCOMPLISHED BY DRILLING HOLES ON ONE AND ONE-HALF TO FIVE FOOT CENTERS ON THE SLOPE PLANE AND SHOOTING THE HOLES WITH DYNAMITE USING PRIMACORD. THE DRILL HOLES ARE MADE BY PERCUSSION TYPE DRILLS. THE AIR SPACE AROUND THE EXPLOSIVE IS FILLED WITH FINE STONE OR COARSE SAND. PRESPLITTING IS AN ECNOMICAL TECHNIQUE FOR BLASTING ROCK CUTS ON HIGHWAY CONSTRUCTION.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/25073860
• Authors:
  • Moss, J P
• Publication Date: 1966-10

Media Info

• Serial:
  • World Highways/Routes du Monde
  • Publisher: Route One Publishing Limited
  • ISSN: 0964-4598
  • Serial URL: http://www.worldhighways.com

Subject/Index Terms

• TRT Terms: Boreholes; Economics; Excavations; Presplitting (Blasting); Road construction; Rocks; Slopes
• Old TRIS Terms: Rock presplitting
• Subject Areas: Economics; Geotechnology; Highways;

Filing Info

• Accession Number: 00231137
• Record Type: Publication
• Source Agency: Intl Road Fedn World Meetings Proc
• Files: TRIS
• Created Date: Aug 15 2004 1:52AM