Browse TRAIL Inventories

Hot milling of rock-drill bits at the mines of the Vinegar Hill Zinc Co., Platteville, Wis.

Underground mill at the Doyle Mine, Shullsburg, Wis.

Dust produced by drilling when water is sprayed on the outside of the drill steel

Bit gage v. drilling speed

Mount Weather testing adit :progress report 1

Relative air dustiness during cycle of operations at Mount Weather Testing adit

Stemming in metal mines.

Stemming in Metal Mines. Progress Report 2

Comparison of manganese steel with carbon steel for detachable-bit drill rods

Stemming in metal mines.

Stemming in Metal Mines. Progress Report 3: Relative Advantages and Disadvantages of Different Types of Stemming and No Stemming When Used with 60 Percent Ammonia Gelatin Dynamite at the Mount Weather Testing Adit

Stemming in metal mines :progress report 6 : relative advantages and disadvantages of different types of stemming and no stemming when used with 40 percent ammonia gelatin dynamite at the Mount Weather testing adit

Effect of lubricating agents in a diamond-drilling-bit coolant and cuttings-removal medium

Diamond drilling and diamond bit investigation.

Yancey-Crawford manganese deposit, Rockingham County, Va.

Watson manganese deposit, Page County, Va.

Shaped charges applied to mining:

Blasting no-cut-hole raise rounds using millisecond delays


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