a. Granulated material obtained by pouring melted material into water. Standard, 2
b. In the roof of a coal seam, a funnel-shaped downward intrusion of sedimentary rock, usually sandstone. See also: stone intrusion AGI
c. The vertical displacement in a downthrow fault; the amount by which the seam is lower on the other side of the fault. CTD
d. In an air lift, the distance the water level sinks below the static head during pumping. Lewis
e. The small downward descent of the upper section of a drill rod, casing, or pipe into a lower like section when the threads of the box- and pin-threaded parts match, so that upper and lower sections may be screwed together without cross-threading. Long
f. The sudden descent of a bit that occurs when a bit encounters a cavity or cuts through a hard rock and enters a very soft rock. Long
g. To lower drill-string equipment into a borehole. Long
h. To lower the cage to receive or discharge the car when a cage of more than one deck is used. Fay
i. To allow the upper lift of a seam of coal to fall or drop down. Fay
j. To lose equipment in a borehole. Long
Source:
Dictionary of Mining, Mineral, and Related Terms












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