7 Colo. Code Regs. § 1101-9-6-2

Current through Register Vol. 47, No. 20, October 25, 2024

Section 7 CCR 1101-9-6-2 - Drilling and Loading

(A) Procedures that permit safe and efficient loading shall be established before the loading of explosive materials is started.

(B) All boreholes shall be sufficiently large to admit freely the insertion of the cartridges of explosives.

(C) Tamping shall be done only with wooden rods or with approved plastic tamping poles without exposed metal parts, but non-sparking metal connectors may be used for jointed poles. Violent tamping shall be avoided. The primer shall never be tamped.

(D) No boreholes shall be loaded except those to be fired in the next round of blasting. After loading, all remaining explosive materials shall be immediately returned to magazines or day boxes.

(E) No explosives or blasting agents shall be left unattended on a blast site.

(F) Drilling shall not be started until all remaining butts of old boreholes are examined for unexploded charges, and if any are found, they shall be refired or removed before work proceeds.

(G) No person shall be allowed to deepen boreholes that have contained explosives or blasting agents.

(H) Drilling shall not be conducted where there is a danger of intersecting a loaded borehole or misfired explosive material.

(I) Equipment, machines and all tools not used for loading explosives into boreholes shall be removed from the immediate location of boreholes being loaded with explosives. Equipment shall not be operated within 50 feet of loaded boreholes except when equipment is needed to add cover or mats.

(J) Loaded boreholes shall not be left unattended.

(K) The Type I permittee shall maintain an accurate, up-to-date record of explosives, blasting agents and all blasting supplies used in a blast and shall keep an accurate running inventory of all explosives and blasting agents stored on the operation.

(L) Pneumatic loading of blasting agents into blast holes primed with electric detonators or other static-sensitive initiation systems shall conform to the following requirements:

(1) A positive grounding device for the equipment shall be used to prevent the accumulation of static electricity.

(2) A semi-conductive hose shall be used.

(3) A qualified person shall evaluate all systems to assure that they will adequately dissipate static under potential field conditions.

(M) Primers shall be made up immediately prior to placing the primer in the borehole.

(N) Dropping or pushing a primer or any explosive with a lighted fuse attached into a borehole is prohibited.

(O) Detonators shall not be loaded into a hot hole or exposed to temperatures above 150° F unless specifically designed and approved by the manufacturer for higher temperatures.

7 CCR 1101-9-6-2

38 CR 03, February 10, 2015, effective 3/10/2015

41 CR 21, November 10, 2018, effective 12/1/2018

42 CR 06, March 25, 2019, effective 5/1/2019