Electric detonators; misfiring; waiting period
Sec. 7. (A) Where misfires occur with electric detonators, a
waiting period of at least 5 minutes shall elapse before anyone
returns to the shot. After such failures, the blasting cable shall be
disconnected from the source of power and the battery ends
short-circuited before electric connections are examined.
(B) Explosives shall be removed by firing a separate charge at
least 2 feet away from, and parallel to, the misfired charge or by
washing the stemming and the charge from the borehole with water,
or by inserting and firing a new primer after the stemming has been
washed out. Misfires shall be removed promptly and before any other
work is done in such place.
(C) A very careful search of the working place, and, if necessary,
of the coal after it reaches the tipple shall be made after blasting a
misfired hole, to recover any undetonated explosive.
(D) The handling of a misfired shot shall be done by a certified
shot firer.
(Formerly: Acts 1955, c.168, s.46.)
Last modified: May 27, 2006