Title 25, Chapter 8, Section 2
As used in this chapter, the term:
(1) "Blaster" means a person qualified by reason of training,
knowledge, or experience to fire or detonate explosives in
blasting operations and who has in his possession a valid
blaster's license issued by the Commissioner.
(2) "Blasting operation" means the use of explosives in the
blasting of stone, rock, ore, or any other natural formation or in
any construction or demolition work but shall not include the use
of explosives in agricultural operations and private and personal
use of explosives in remote areas for such operations as ditching,
land clearing, destruction of beaver dams and other such
operations when not in close proximity to adjacent property. This
chapter shall not apply to any blasting operation in which the
charge weight is 200 pounds or less.
(3) "Charge weight" means the total weight in pounds of an
(4) "Charge weight per delay" means the weight in pounds of an
explosive charge which is detonated per delay period for delay
intervals of eight milliseconds or greater or the total weight of
explosives in pounds which is detonated within an interval less
than eight milliseconds.
(5) "Commissioner" means the Safety Fire Commissioner.
(6) "Delay initiation" means the detonation of the subcharge of
explosives in predetermined sequence which is accomplished by
using regular or short period delay electric blasting caps or
other means of equivalent effectiveness.
(7) "Delay period" means the time interval in milliseconds (eight
milliseconds or greater) between successive detonations of
subchargers produced by the delay devices used.
(8) "Distance" means the actual distance in feet along ground
contour to the nearest house, public building, school, church, or
commercial or institutional building normally occupied.
(9) "Explosives" means any chemical compound or other substance or
mechanical system intended for the purpose of producing an
explosion or containing oxidizing and combustible units or other
ingredients in such proportions or quantities that ignition by
fire, by friction, by concussion, by percussion, or by detonator
may produce an explosion capable of causing injury to persons or
damage to property.
(10) "Particle velocity" means the velocity with which an earth
particle moves when vibrating or oscillating in any manner from
its position of rest or elastic equilibrium.
(11) "Person" means any individual, public or private corporation,
political subdivision, government agency, municipality, industry,
partnership, association, firm, trust, estate, or other entity
(12) "Scaled distance" or "Ds" means the actual distance (D) in
feet divided by the square root of the maximum charge weight (W)
in pounds that is detonated per delay period. This means:
Ds = _______
Scaled distance = Actual distance
charge weight per delay interval