What to Pay Attention to During Blasting Operations

1、Only professionals with blasting licenses must be employed. Operations must be conducted strictly according to the technical procedures for blasting. Only qualified detonators should be used.Explosive Line。

2、Explosives handlers must strictly adhere to the system for the withdrawal and issue of blasting materials. The required explosives and electric wires for the shift must be limitedly collected by the on-duty handler, then safely transported directly to the work site, and placed inExplosive Storage CabinetKeep locked and do not discard or place carelessly.

3、The blast hole layout must indicate the height of the coal mining face and the range of drilling or the cross-sectional dimensions of the tunneling face, as well as the position, quantity, depth, angle, and numbering of the blast holes, represented by front view, plan view, and section view.

4、The borehole specification sheet must detail the name, depth, and angle of the borehole, the type of explosives and detonators used, the amount of charge, the length of the sealing clay, the wiring method, and the sequence of initiation.

5、Prior to the blast, a designated person must be posted at the caution line and all pathways leading to the blast site to ensure security. Additionally, all personnel must evacuate the work area and move to the fresh air stream during the blasting process, as there is a return airway in the Duoyu return airway.

6、Amplifying at the blast site must be reinforced to prevent damage to tunnels and cave-ins. In the event of damaged support structures, the presence of overhanging roofs, blocked passages, signs of water leakage, or inadequate air volume at the working face, it is strictly prohibited to load explosives and conduct blasting.

7、The length of the fuse during the fireworks must comply with the specified length.Blasting WireDistance from firecrackers, the turning length must not be less than50 meters, the straight-line distance must not be less than 100 meters.Mining blasting wireAll connections must comply with relevant regulations; no contact with any cables or conductors is permitted during the process of stringing fireworks.

8、Enforce strictly"Three-Check-One-Shot" and "Three-in-One Chain" system.Ignite the WireNear the blast siteWind speed of 20 meters and within, gas concentration reaches

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