Field Evaluation of Fracture Control in Tunnel Blasting

Details

• Creators:
  McKown, A. F. ; Fourney, W. L. ; Sperry, P. E. ; Thompson, D. E.
• Corporate Creators:
  Haley & Aldrich
• Corporate Contributors:
  John A. Volpe National Transportation Systems Center (U.S.) ; United States. Urban Mass Transportation Administration
• Subject/TRT Terms:
  • Boreholes
  • Construction sites
  • Control
  • Cost effectiveness
  • Evaluation
  • Excavation
  • Excavation and tunneling
  • Explosive excavation
  • Field tests
  • Fracture mechanics
  More +
• Publication/ Report Number:
  DOT-TSC-UMTA-79-44;UMTA-MA-06-0100-7914
• DOI:
  https://doi.org/10.21949/1527131
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  United States. Urban Mass Transportation Administration
• Abstract:
  The objective of this research was to implement fracture control procedures in a tunnel project and to assess the practicality, advantages, disadvantages, performance and cost effectiveness of fracture control methods against smooth blasting procedures. This report describes the procedures and results of field tests of fracture control--a procedure for achieving fracture plane control in tunnel blasting. It describes and discusses the project and site geology, the theory and applications of fracture control blasting, and the experimental procedures used. The report provides conclusions and recommendations for future research. The procedures and results of an experimental smooth blasting round utilizing milli-second delay detonating caps are described in Appendix A.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/11699/dot_11699_DS1.pdf
• File Type:
  [PDF - 13.24 MB]
• Collection(s):
  Volpe Center
• Main Document Checksum:
  urn:sha256:eda6df3bbda290285a0140f05a54387797b6a135ef5f63981ee4ac66e9b2cde2