1) Conduct education and training on blasting safety for underground blasting personnel.
2) Blasters must be skilled in the performance of explosive materials.
3) The underground blasting work must be carried out by a full-time blaster. In the coal seam with coal and gas outburst, the work of the full-time blaster should be fixed on one working face.
4) The blaster must undergo special training and hold a blasting certificate, and the blasting must be carried out in accordance with the blasting instructions.
5) The blasting instructions must be prepared for each blasting point in the well. The blasting instructions should be accompanied by a blasthole layout and a blasthole specification sheet.
6) The blasting instructions must be reported to the technical person in charge for approval.
7) Blasters, team leaders, and gas inspectors must perform “one shot three inspections†and “three-person chain release systems†on site.
8) It is strictly forbidden to use pulverized coal, block materials and other combustible materials for blasthole sealing. It is strictly forbidden to blast and prevent naked blasting from blastholes without sealing mud or mud.
9) When the depth of the blasthole is less than 0.6 m, blasting shall not be carried out. Safety measures must be taken when shallow blasting is necessary to seal the mud.
10) When the depth of the blasthole is 0.6-1 m, the length of the sealing mud shall not be less than one-half of the depth of the blasthole. When the depth of the blasthole exceeds 1 m, the sealing mud shall not be less than 0.5 m. When the depth of the blasthole exceeds 2.5 m, the length of the sealing mud shall not be less than 1 m.
11) Check whether the gas concentration is less than 1% before blasting.
12) Before blasting, the blasting face must be inspected carefully. The team leader must set up a person to stand on the police line and all the passages that may enter the blasting site. It is strictly forbidden for all personnel to pass, and all personnel should be evacuated to the security line. location.
13) The blaster must finally leave the blasting site and must be blasted at a safe location with cover.
14) The handle and key of the detonator must be carried by the blaster and must not be handed over to others.
15) The key must be pulled out immediately after blasting, the busbar is removed and connected to a short circuit.
16) Before the blasting, the team leader must count the number of people and confirm the safety. The order is issued. After the blaster receives the order from the team leader, he must issue a blast warning signal and wait for 5 seconds before blasting.
17) After the blasting, the team leader and the blaster must inspect the blasting site and check the ventilation gas, coal dust, support, rejection, residual explosion, etc., and must be disposed of immediately if there is any danger.
18) Only when the gun smoke is blown away, the guards are personally withdrawn by the deployed team leader before they can enter the work surface.
19) Do not use explosives of poor quality and bad quality. The one-time blasting should be adapted to the ventilation capacity. Coal mining face should strengthen ventilation management, reduce air leakage and avoid series ventilation.
20) Sprinkle water thoroughly within 20 meters before and after blasting, and cover the nose and mouth with a wet towel when passing through the gun area.
21) Strictly prevent the exposed parts of the early detonator and the blasting busbar from coming into contact with other objects, and short-circuit the detonator foot line in advance.
22) Strengthen the maintenance and maintenance of electromechanical equipment so that the stray current of the work does not exceed 50 mA.
23) When loading the material at a place with stray current, an insulating rubber pad should be placed and the operator should work on the rubber pad.
24) Store explosives and detonators and where the primers are placed, as well as the top of the work surface must be safe and reliable, and the tools should be properly placed to prevent coal and rock block hard devices from hitting detonators and explosives.
25) Do not make the density of the medicine roll too large or too small when charging. Wait at least 5 minutes when using the instantaneous power generation detonator. Wait for at least 15 minutes when using the delayed electric detonator to check the reason for the slow explosion along the line.
26) Before entering the old airspace 15 meters, it is necessary to find out the specific location and area of ​​the old air and the water, gas, fire, etc., otherwise it is not allowed to blast.
27) If the water in the blasthole is found when the eye is blown, the temperature suddenly rises and falls, and if there is a large amount of gas escaping or loose coal, the blasting should be stopped.
28) When blasting penetrates the old empty area, all personnel should be evacuated to a safe place if they are exposed to water hazard. After blasting, the operation can be resumed after confirming that there is no danger.
29) It is necessary to adhere to the principle of “having to explore and explore first and then exploreâ€.
30) Close to the water-storing area, it is necessary to formulate the feasible design and safety measures for the water-producing water according to the actual situation. Otherwise, blasting is strictly prohibited.
31) When the working surface is found to have a permeable warning, stop blasting, report in time, find out the cause, and take measures.
32) Wooden turrets must be used. It is strictly forbidden to use a detonator to ignite the lightning line to make conduction.
33) The explosives and detonators used must be shipped in separate containers and locked separately, and the collar, use, and return accounts should be clearly defined, and the accounts should be consistent.
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