A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Shaped charges applied to mining. I -- Drilling holes for blasting
All shaped charges used in investigation were US Corps of Engineers demolition type in two sizes; tests proved that shaped charge has no practical application in functions of mining covered by this report; cost is over 20 times that of producing better hole with rock drill.
Shaped charges applied to mining. I -- Drilling holes for blasting
All shaped charges used in investigation were US Corps of Engineers demolition type in two sizes; tests proved that shaped charge has no practical application in functions of mining covered by this report; cost is over 20 times that of producing better hole with rock drill.
Shaped charges applied to mining. I -- Drilling holes for blasting
US Bur Mines -- Report Investigations
Draper, H.C. (author) / Hill, J.E. (author) / Agnew, W.G. (author)
1948
12 pages
Supp plates
Report
English
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Online Contents | 1997
Online Contents | 1997
Online Contents | 1996
Online Contents | 1997
Online Contents | 1997