Current through Register Vol. XLI, No. 50, December 13, 2024
Section 38-6-4 - Explosives and Blasting4.01. Permissible explosives applicable to local conditions shall be used exclusively.4.02. Primers shall not be made up until the charge is ready to be inserted in the hole. All holes, or series of holes, containing electric detonators shall be fired immediately after being charged or at end of shift: Provided, however, that if, for any reason, the holes cannot be fired immediately or at end of shift, all work shall cease within a radius of 200 feet of blast area, and work shall not commence again until the holes have been fired. This rule does not apply if primacord is used.4.03. Frozen explosives shall not be used.4.04. The shot firer shall wait 15 minutes before returning to a misfired shot, except when using an electric blasting cap.4.05. Extra precaution shall be taken in recovering of the explosive and blasting cap from a misfired shot.4.06. Immediately after each blast the shot firing cables shall be immediately disconnected from the blasting unit and shunted.4.07. Explosives shall not be handled or used during an electrical storm.4.08 Magazines shall be located at least two hundred (200) feet from the face and roadway an out of the line of blasting.4.09 Trailer vans may be used for the temporary storing of explosives: Provided, however, that it is located in accordance with the American Table of Distances to inhabited buildings, passenger railroads and public highways. The trailer vans shall be provided with substantial means for locking, and the doors shall be kept locked, except for the placement and removal of stock.4.10. Only competent persons designated by management shall handle explosives and do blasting.4.11. Only electric detonators of proper strength shall be used and they must be fired with permissible shot firing units.4.12. Drill holes shall be cleaned of cuttings before being charged.4.13. Ample warning shall be given and care taken that all persons are in the clear before firing any shot.4.14. After firing a shot the shotfirer, or any other person, shall not return to the working face until the smoke has cleared.4.15. The number of holes fired in any one round shall not exceed the limit of the permissible firing unit used.4.16. The shot firing circuit shall be tested with a galvanometer before firing.4.17. While bore holes are being charged, equipment shall not be operated in the immediate area.4.18. All shooting shall be done at the end of the working shift.4.19. Two-way radio on motor vehicles shall not be used in a mine while shots are being loaded.4.20. Tamping poles shall be made of wood or other nonsparkable material.4.21. Shooting stations shall be kept locked when not in use and only authorized persons shall have the keys.4.22. Prill loading machines shall be of an approved type and equipped with static strip hose and grounded.4.23. When caps and fuse are used an approved cap crimper shall be used.4.24. When shots are fired by means of caps and fuse, two or more persons shall do the firing.