heel of a shot

heel of a shot

[′hēl əv ə ′shät]
(engineering)
In blasting, the front or face of a shot farthest from the charge.
The distance between the mouth of the drill hole and the corner of the nearest free face.
That portion of a drill hole which is filled with the tamping.
(mining engineering)
That portion of the coal to be fractured which is outside the powder.