An electrically driven machine including high-pressure pump and special
cleaning solution for removing grease and oil from underground mine
machines as a prevention of mine fires.
The degree of compaction of a soil sample. Hammond
The ratio, expressed as a percentage, of the amount of consolidation at a
given time within a soil mass, to the total amount of consolidation
obtainable under a given stress condition. ASCE
In mineral dressing, the degree of liberation of a certain mineral or
phase is the percentage of that mineral or phase occurring as free
particles in relation to the total of that mineral occurring in the free
and locked forms. Gaudin, 1
In mineral dressing, the degree of locking of a mineral is the percentage
occurring in locked particles in relation to the total occurring in the
free and locked forms. Gaudin, 1
Of an explosive, the loading weight per unit of nominal volume, which is
always known. Its unit is kilogram per cubic decimeter. The degree of
packing defined in this way is 6% greater than the density of the
explosive in the drill hole. Langefors
a. The percentage of the volume of water-filled voids to the total volume
of voids in a soil. Nelson
b. Ratio of weights of water vapor in air at given conditions and at
saturation, with temperature constant. Specific humidities are usually
employed. Measured in percent. Hartman, 1
Ratio of the surface areas or sizes of the broken or crushed material to
those of the feed material. BS, 5
a. The measure for the spread of grain-size distribution.
Schieferdecker
b. A measure of the spread or range of variation of the particle-size
distribution in a sediment. It is defined statistically as the extent to
which the particles are dispersed on either side of the average; the wider
the spread, the poorer the sorting. It may be expressed by sigma phi.
AGI
Absolute temperature on the centigrade scale, or degrees C plus 273.16.
Strock, 2
Absolute temperature on the Fahrenheit scale, or degrees F plus 459.6.
Strock, 2
A variation of the freezing method of shaft sinking, in which liquid
carbon dioxide is pumped into the ground instead of brine.
See also:Oetling freezing method
A hydrous phosphate of calcium, sodium, and potassium; hexagonal;
crystalline crusts and minute crystals; grayish- to greenish-white. The
mineral from Dehrn, Nassau, Germany, is richer in sodium, conforming
nearly to the formula 7CaO.Na2 O.2P2 O5 .H2 O
, whereas the mineral found near Fairfield, UT is described as
14CaO.2(Na,K)2 O.4P2 O5 3(H2 O,CO2 ) .
English
The process of removing moisture from mine air to increase its cooling
capacity--an important factor in environmental health and comfort in deep
mining. See also:dry kata cooling power; effective temperature.
Hartman, 2
a. To render free from water. Webster 3rd
b. The process of driving water from a hydrated mineral, e.g., gypsum,
CaSO4 .2H2 O , to anhydrite, CaSO4 .
Freed from water or lacking water.
One from which the normal water content has been evaporated, usually by
natural processes.
A device or material that will remove water from a substance.
See also:dryer
Removal of ions from solution by chemical means. Syn:demineralization
ASM, 1
Proprietary type of shaking table used in mineral processing.
Pryor, 3
A trigonal mineral, CuFeO2 ; in the oxidized zone of copper
deposits.