Presplitting is a method of precise excavation utilizing slope drilling within the plane of intended slope with detonation of the slope holes prior to production blasting. The techniques and problems encountered by the California Department of Transportation have been previously discussed in three interim reports, dealing with metamorphic, granitic, and sedimentary rocks in three different areas. This report is a synthesis of the conclusions developed in the previous reports. Observations are presented on the economics, construction, and maintenance aspects of presplitting in addition to the general conclusions and recommendations of the authors, and the specifications developed as a result of the study. It is recommended that presplitting, with the specifications included in this report, be considered for all blasting excavation with slopes steeper than 1:1.

  • Corporate Authors:

    California Department of Transportation

    Transportation Laboratory
    5900 Folsom Boulevard
    Sacramento, CA  United States  95819
  • Authors:
    • McCauley, M L
    • Hoover, T P
    • Forsyth, R A
  • Publication Date: 1974-9

Media Info

  • Pagination: 32 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00098586
  • Record Type: Publication
  • Report/Paper Numbers: CA-DOTL-TL-29557432
  • Created Date: Oct 18 1975 12:00AM