- المجال: 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 sample of rock or rock material recovered by using a basket tube or core barrel.
Industry:Mining
A sample of rock penetrated in a well or other borehole obtained by use of a hollow bit that cuts a circular channel around a central column or core.
Industry:Mining
A sample that is as undisturbed as humanly possible, as distinct from a sample disturbed by boring tools. Special appliances are used to obtain such samples from boreholes, and the material is preserved in its natural state in airtight containers. Undisturbed samples are required so that the in-place (in situ) properties of the soil may be determined. It is difficult to obtain undisturbed samples of sandy soils without considerable preparation.
Industry:Mining
A sample, making a notch or groove, cut from roof to floor of a coal seam, or from hanging wall to footwall of a vein.
Industry:Mining
A sample-reducing device that splits a batch sample of ground ore into two equal streams as it falls across an assembly of deflecting chutes.
Industry:Mining
A sampling device using force provided by a vacuum chamber (containing air at atmospheric pressure) to suck in a sediment sample. On striking the bottom, the chamber is put into communication with the outside. Water pressure forces the sample into the collecting tube. The pressure chamber itself is a strong brass tube closed at the upper end by a lid and held firmly in position by a clamp. A sampling tube is fixed below the chamber and extends upward into it. Between the upper and lower parts of the central tube is a plug held in position by retaining hooks through slots in the wall of the lower tube. When the device strikes the bottom, a mouth tube rises, disengaging the plug, which flies up the tube. The water then forces material up into the collecting tube.
Industry:Mining
A sampling method in which the sample is formed into the requisite flat heap by placing it upon a rubber or other smooth sheet and, by lifting the corners of this sheet in proper rotation, rolling the material to and fro. The resultant heap is then quartered and alternate quarters are taken. This method is used with smaller bulk and smaller sizes of material.
Industry:Mining
A sand bed in the floor near the blast furnace into which the molten pig is run to be cast into convenient sizes for handling.
Industry:Mining
