- Industry: Mining
- Number of terms: 33118
- Number of blossaries: 0
- Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
A shot prepared by loading (charging) in such a way that an airspace is purposely left in contact with the explosive for the purpose of lessening its shattering effect.
Industry:Mining
A shot so placed that the point or inner end of the hole is considerably farther from the face of the coal to be broken than is the heel or outer end of the hole.
Industry:Mining
A shot that breaks the coal only enough to allow the gases of detonation to escape with a whistling or squealing sound; also called a whistler.
Industry:Mining
A shot that dissipates the explosive force by blowing out the stemming instead of breaking down the coal. It may be caused by insufficient stemming, overcharging with explosive, or a burden that is too much for the charge to dislodge.
Industry:Mining
A shot that dissipates the explosive force by blowing out the stemming instead of breaking down the coal. It may be caused by insufficient stemming, overcharging with explosive, or a burden that is too much for the charge to dislodge.
Industry:Mining
A shot that dissipates the explosive force by blowing out the stemming instead of breaking down the coal. It may be caused by insufficient stemming, overcharging with explosive, or a burden that is too much for the charge to dislodge.
Industry:Mining
A shot that merely blows out a soft stratum in the coal or escapes through a seam without loosening the main mass of coal. In Arkansas, called squeal-out.
Industry:Mining
A shot used for widening an entry; it is placed at some distance from the head of an entry.
Industry:Mining
