- 行业: 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 ...
The firing of a number of shots in a tunnel, or shaft sinking at one operation with instantaneous or delay detonators.
Industry:Mining
The firing of a round of shots by means of current supplied by a transformer fed from a main power supply.
Industry:Mining
The firing of an entire face at one time. The holes are connected in a single series and all the holes shoot at the same instant.
Industry:Mining
The firing of detonators in a round of shots by dividing the total supply current between the individual detonators. Compare: series firing.
Industry:Mining
The firing of detonators in a round of shots by dividing the total supply current into branches, each containing a certain number of detonators wired in series.
Industry:Mining
The firing of detonators in a round of shots by passing the total supply current through each of the detonators. Compare: parallel firing.
Industry:Mining
The firing of explosive charges in the cracks of loosened rock. The clay stemming is forced around the charge by a bulling bar.
Industry:Mining
The firing of one or more charges electrically, whether electric blasting caps, electric squibs, or other electric igniting or exploding devices are used.
Industry:Mining
The firing of several shots in sequence, at designed intervals of time, usually by means of delay detonators, detonating relays, or sequence switches.
Industry:Mining
