The alert 4.5.6.3 charging range should be determined by the command according to the design and environmental characteristics. Begin charging operations, banning all staff to enter the blast site and warning flag is set.4.5.6.4 all channels entering the blast area and the entrance to the danger zone, must be persons alert, alert personnel should have a warning flag, a siren or a portable loudspeaker.4.5.6.5 alert area, requirements and environment protection should be based on project characteristics, complexity and other factors, determined by the design.4.5.6.6 design, you must provide the alert area plan. Diagram shall identify the danger range, set the position of the alert and warning signs, and according to the design requirements for the actual survey, further approved the warning and instruction signs, ensure to close all channels.4.5.6.7 alert personnel for at least half an hour before detonating to designated locations induction scheduled cut off passages leading to or after blasting point, until after the sending off alert signals, out of his guard post. Perform guard duties of officers, are not allowed to do other things in the post.4.5.6.8 after the blast found that blind shot or have unstable structure exists, without prior to treatment, should be set up at the scene warning and hazard signs.4.5.7 communications4.5.7.1 blasting during construction, headquarters should be blasting, priming, the danger point to establish communications.4.5.7.2 up to Commander communications system with contact information of the procedure to call each other. Communication can be equipped with a wired telephone or portable radios.
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