Rapid Excavation of Rock with Small Charges of High Explosive

Details

• Personal Author:
  Ashcom DW ; Clark GB ; Hanna, Kanaan
• Description:
  The purpose of this investigation was to test a blast shield, develop a conceptual design for an automated drill and blast system (adbs), and make an economic analysis of the adbs compared with conventional drill, blast, and muck (dbm) systems. The adbs tunneling concept was developed in an effort to design an excavation system of greater efficiency than the dbm systems conventionally used. The adbs would minimize downtime and approach noncyclic efficiently by small charge blasting. Small charge blasting uses simultaneously detonated light charges in four to eight short holes, usually in a line. Limitation of the total explosive per blast reduced air blast overpressure, fly rock velocity, vibrations, and noise enabling the blast shield to adequately contain these side effects. Conceptual design for the adbs included blast shield, chassis, hydraulic drills, automated explosive loading and firing system and an armored cab. Horizontal and vertical blast shield alinement controls and ventilation are incorporated into the design. [Description provided by NIOSH]
• Subjects:
  Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Open File Report
• Document Type:
  Text
• Genre:
  Conference Publications ; Final Contract Report
• Place as Subject:
  Colorado ; OSHA Region 8
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  TCRC - Twin Cities Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-250
• NIOSHTIC Number:
  nn:10001698
• NTIS Accession Number:
  PB81-125577
• Citation:
  NTIS: PB/81-125577; :1-250
• Federal Fiscal Year:
  1980
• Performing Organization:
  Colorado School of Mines
• Peer Reviewed:
  False
• Source Full Name:
  NTIS: PB/81-125577
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:18c6ebc5301e0acef855bdcc7bf74c56af36f0089937ab8c678e7404f3d7a05978c71b4be2c44fc4368c1630493bb5c649566a8b8bfa04477d0258f37f5ade74
• Download URL:
  https://stacks.cdc.gov/view/cdc/206548/cdc_206548_DS1.pdf
• File Type:
  [PDF - 7.42 MB ]