- 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 drag created on the outside of a pipe being driven into overburden material, which presses and rubs against the outside surface of the pipe and its couplings.
Industry:Mining
The drawing or conveying of the product of the mine from the working places to the bottom of the hoisting shaft, or slope.
Industry:Mining
The dressed edge of a stone, which serves as a guide in cutting the rest.
Industry:Mining
The drifts, tunnels, and crosscuts driven in stone, preparatory to opening out production faces in a coal seam or orebody. Horizon mining is characterized by a heavy outlay on the initial unproductive development.
Industry:Mining
The drill rods coupled to form the connecting link between the core barrel and bit in the borehole and the drill machine at the collar of the borehole.
Industry:Mining
The drillers' record of the depths, thicknesses, and lithologic characteristics of the formations encountered in the seismic shothole.
Industry:Mining
The drilling of a number of holes in a single plane and radiating from a common point. Compare: horadiam
Industry:Mining
The drilling of boreholes from the surface or from underground workings, to seek and locate coal or mineral deposits and to establish geological structure. Exploratory drilling is frequently done from underground workings, the holes being drilled upward, horizontally, or downward as required. For underground drilling, roller bits, diamond crowns, or tungsten-carbide bits may be used and can be coring or noncoring. Rotary boring is the predominant method for exploratory work from the surface, particularly where cores of significant deposits are required.
Industry:Mining
The drilling of boreholes in unconsolidated or earthy formations using the erosive power of a small-diameter stream of water forcefully ejected as the cutting tool.
Industry:Mining
The drilling of boreholes with wire-line core-barrel drill-string equipment.
Industry:Mining
