The bottom of Yaoxia of the Affiliation is deeper and deeper. It is more difficult to use for wind tunnel construction. For the convenience of construction, it is determined by research that when the bottom depth is more than 0.6m and the bottom plate is hard, the blasting method is used to ensure the construction safety. Supplement the following safety technical measures:

Second, security measures:

1. Enter the construction site to knock on the top, remove the dangerous rock, and clean the construction site to clean up the debris.

2. The position and depth of the blasthole are determined by the gunner according to the scene. The depth of the blasthole is not less than 0.6m. Only one eye is allowed at a time, and one shot is applied once. The charge is 1/3 of the whole medicated roll. After charging The blasthole must be covered with mud. Shallow-eye blasting is strictly forbidden. After charging, use waste belts and wooden boards to cover the upper part of the blasthole.

3. Before the blasting, the machine and electrician area shall properly protect the waiting room and signal room glass door, signal room operation table, lighting, cable, wind pipe and equipment. Before blasting, it is necessary to sprinkle water within 20m near the shooting site to check the gas concentration and check the gas concentration. When the gas concentration reaches 0.5%, it is not allowed to shoot.

4. When shooting, it must be commanded by the security inspector and the team leader.

5. The blasting busbar and connecting line should meet the following requirements: 1 The blasting busbar must meet the standard. â‘¡ blasting busbar and the connection line, the joint between the electrical detonator foot line and the connection line, and the foot line must tighten the foot line with each other and suspended, and can not track metal tube, a conductive metal mesh, wire rope contact. 3 The blasting busbar, cable and signal line should be hung on both sides of the roadway. If it must be hung on the same side, the blasting busbar must be hung under the cable and should be kept at a distance of more than 0.3m. 4 single-circuit blasting of insulated busbars is permitted. It is strictly forbidden to use rails, metal pipes, metal mesh, water or earth as loops. 5 Before blasting, the blasting busbar must be twisted into a short circuit. 6 The blasting busbar used by the blasting machine shall meet the standard requirements, and shall not have a clear joint. It is strictly forbidden to use fixed busbar blasting.

6. Dust-recovering method during construction and blasting: use wet-type eye-catching, water-cannon mud to set the cannon, sprinkle water to remove dust before and after shooting, wash the lanes, and open the original roadway spray to reduce dust and prevent flying coal dust from flying.

7. When firing, it is necessary to strictly implement the "one gun four inspections", "three-person chain" and the "three insurance" system.

8. Before each charge blasting, the team leader should designate a person to go to all the roadways leading to the blasting site. The guards must be on fire at a safe place. Warning signs, railings or drawstrings should be placed at the warning line. All personnel in the warning area (auxiliary well bypass, power distribution room, and personnel in the sub-dark winch room) are forbidden. Other personnel are strictly forbidden to enter. The distance from the gun evacuation station must be 100m and there is a shelter. The curved lane is 75m. Provisions. The blaster detonated outside the warning distance, and the blasting whistle was blown out. The team leader or the gunners personally dismissed the post.

9. When handling the explosion-proof and residual explosion, it must be carried out under the guidance of the team leader and should be completed on duty. If the shift is not completed, the blaster on duty must be clear to the next blaster on the spot. When handling the refusal, the following regulations must be observed: 1 Re-explosion due to poor connection, can be re-wired. 2 In addition to the 0.3m away from the blasthole, another new blasthole parallel to the blasthole is re-elected. 3 It is strictly forbidden to use the planer or remove the original placed explosive charge from the blasthole or pull out the electric detonator from the primer. It is strictly forbidden to continue to deepen the bottom of the blasthole with or without residual explosives; it is strictly forbidden to use the method of eye-catching to smear out the medicine; it is strictly forbidden to use the pressure wind to blow the blasthole. 4 After handling the explosion of the blasthole, the blaster must inspect the blasted meteorite in detail and collect the unexploded electric detonator. 5 It is strictly forbidden to perform work unrelated to the treatment of refusal at the location before the blasting process is completed.

10. When blasting, contact the personnel in the signal room of the well to stop the operation of the auxiliary shaft cage.

11. Due to the cold weather, the cage is de-iced by the machine and electrician area before each construction.

4. Other matters not mentioned are strictly implemented in the relevant provisions of the “Safety Regulations for Coal Mines” and “Operational Regulations for Coal Mine Safety Technology”.

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