1. The blaster must undergo special training and obtain the blasting certificate issued by the relevant department after passing the examination. Second, the blaster must hold the blasting certificate to get the blasting materials from the gunpowder warehouse. The quality and quantity of the blasting materials should be carefully checked when receiving. Third, the blasting hole is not experienced or can not meet the blasting requirements of the unqualified blasting. Fourth, the motor vehicle or scraper should not be used to transport the blasting materials, and the special gunpowder truck or mine car should be used for transportation. The detonating materials should be delivered by a special person. Explosives are prohibited from being shipped in the same vehicle as the detonating materials. 5. Good lighting should be provided when transporting explosives and detonating equipment in the pit. Smoking is prohibited when handling explosives and processing explosives. 6. When loading and unloading blasting materials, it is necessary to take it lightly and not to hit the collision. 7. The blasting materials should be placed in a safe place when they are transported to the site. The storage should be strengthened. The detonating materials and explosives should be stacked separately. 8. The remaining blasting materials shall be returned to the explosives warehouse on time and shall not be lost, stored or handed over to work. 9. When loading the medicine, the working surface should have good lighting. After checking and handling the safety problems of the top, the help and the working surface, the operation can be started. 10. Before charging, check whether the parts of the applicator are intact, whether the air pipe joint is firm, the air pressure in the cylinder should be kept at 3-4Kg/cm2, and the drug delivery tube must use a semi-conductive plastic tube. XI. After the drug is filled in the hole, when withdrawing the drug delivery tube, be careful not to use excessive force to prevent excessive powder return. 12. Where the mine (rock) stone is in danger of falling (falling), effective precautions should be taken before charging and blasting can be carried out. 13. After the detonating cord is fixed in the blasthole, it should be cut off immediately. You should not wait for the entire blasthole to be cut off after the dose has been loaded. 14. Cutting the detonating cord should use a sharp sharp knife, cut it with one knife, not much knife cutting, and it is forbidden to cut with a wire clamp or cut with stones. Fifteen, the detonating cord joints are applied with black rubber tape and the lap length should not be less than 10 cm. 16. When the branch line of the detonating cord is connected to the main line, the direction of the branch line must be consistent with the direction of the main line. 17. When laying the detonating cord network, it should not be wound into a ring or a buckle. In the case of intersecting detonating cords, the spacers should be lined with a thickness of not less than 10 cm. Eighteen, electric power precautions 1. There should be no cable passing or retaining electrical equipment within 50 meters from the boundary of the explosion zone. When placing the main line, the cable should not be passed. If it must be passed, it should be covered with wood or insulation. Before the blasting construction, the stray current should be tested, and the high-voltage electricity, radio frequency electricity, etc. should be investigated, and the dangers should be taken immediately to prevent and eliminate the measures. 2. Wiring should be cleaned when connecting the wires. Conduction tests shall be carried out for each hole. Special conductive devices and blasting bridges shall be used, and instrumentation shall be checked once a month. The yin should meet the design requirements. The joint should be firmly fixed, the number of windings should not be less than 6 turns, and wrapped with tape. 3, the electric wire blasting network should not be used bare, track not use iron, steel, wire lines do blasting, blasting network should be insulated from the ground, should be provided between the intermediate switch and the power supply network electrical explosion. 4. After all the network of the explosion zone is connected, apply the special instrument to test its resistance and make it meet the design requirements. The busbar and network connector shall be connected to the safety zone after the staff member has completely evacuated to the safety zone. After the security personnel issue a safety signal, the commander of the blasting officer issues a command to connect. 5. After the line is connected, no other personnel should enter the explosion area. 19. When the situation changes, it will seriously affect the blasting effect, and effective measures should be taken before detonation. Twenty, when multiple rows of blastholes are detonated, they should be detonated by using a slight difference or a second difference. 21. Before the detonation, an alert should be placed, an obvious warning signal and sign should be established, and equipment and personnel should be transferred to a safe place to avoid the gun. Twenty-two, when using the gun, you must use a special cannon, you should not use lighters, matches and other open flames. Twenty-three, the last one cannon will be able to withdraw the alert personnel and signals after 15 minutes. Twenty-four. It is forbidden to evade the cannons in the goaf and the roadway where the support is not strong. Twenty-five, when there are rock walls and suspensions after the shooting, effective measures should be taken in time to deal with them, otherwise the next step of charging and blasting should not be carried out. Twenty-six, in the same approach, two rows of blastholes in different fashions, but only a single row of blastholes. Twenty-seven, underground shallow hole blaster operating procedures 1. The blaster shall receive the blasting material according to the blasthole depth and the number of holes. The remaining blasting materials shall be returned to the warehouse (or the issuing station) in time, and shall not be handed over to work or self-storage to prevent loss. 2. The mining work surface also adopts an ignition initiation method. 3. The blasting work shall be carried out by at least two people. 4. Handling blasting materials should be packed in special canvas bags or wooden boxes. Explosives and detonating materials must be transported separately. 5. It is forbidden to transport the blasting materials in the front of the motor or in the bucket of the scraper. It should be carried by a special person. 6. The blasting materials should not be littered and placed in a relatively dry and safe place. The detonating materials and explosives should be stored separately. 7. The processing of the primer should only be carried out at a safe place near the blasting face before charging, and the quantity should not exceed the required amount of the blast. 8. When processing the explosive charge package, only use the wood bamboo or lead awl slightly larger than the diameter of the detonator, and make a small hole at the end of the drug wrap (non-concentrated hole end), carefully insert the detonator into the medicine roll, and use The string secures the roll and the detonator. 9. When processing the detonation kit, it is not allowed to use open flame lighting, and it is not allowed to smoke. 10. The blasthole with water should be equipped with a waterproof cover or a butter waterproofing agent on the primer. 11. Before blasting the medicinal charge, it is necessary to use a wooden gun stick to check in detail whether the depth, direction, position and resistance line of the blasthole in the blasthole meet the requirements, and it is forbidden to pass the unqualified blasthole. Cover the medicine. 12. After the primer is packed into the blasthole, it is forbidden to pull it out. 13, can only be used when the gun charge wooden stick, not the use of iron and other metal products. 14. Filling up the explosives and the mud, it is necessary to manually guide the fire line or the detonating tube, and the other hand is filled, and the fuse and the detonating tube should not be bent or broken. 15. The length of the loaded cannon should not be less than 1/4 of the depth of the hole and fill the hole with the cannon. 16. The following preparations should be made before blasting 1 Check whether the tools and equipment of the firing surface are transferred to a safe place, and whether the filling of each hole meets the safety requirements. 2 The fuse end of the fuse should be cut into a slanting mouth. 3 Arrange the alert personnel, then click on the cannon to ignite and detonate. 17, the use of detonating tube blasting methods and precautions 1 According to the number of blastholes, arrangement and position, receive different stages of detonating tubes for segmental blasting. 2 detonating tube connection. Each 3-5 detonating tubes are grouped together, and each group must not exceed 5. 3 detonator connection method, can be combined in series or series and parallel connection method. 4 The connection of the detonating tube shall be carried out by using a coupling block or a tape to tightly tie each detonating tube tightly with the detonating detonator. 5 The detonator tube joint should not be bent, and the joint angle is also 10°-15°. 18, electric power precautions 1 There should be no cable passing or retaining electrical equipment within 50 meters from the boundary of the explosion zone. When placing the main line, the cable should not be passed. If it must be passed, it should be covered with wood or insulation. Before the blasting construction, the stray current should be tested, and the high-voltage electricity, radio frequency electricity, etc. should be investigated, and the dangers should be taken immediately to prevent and eliminate the measures. 2 Wiring should be cleaned when connecting the wires. Conduction tests shall be carried out for each hole. Special conductive devices and blasting bridges shall be used, and instrumentation shall be checked once a month. The resistance should meet the design requirements. The joint should be firmly fixed, the number of windings should not be less than 6 turns, and wrapped with tape. 3 The electric blasting network should not use bare conductors. Rails, steel pipes and steel wires should not be used as blasting lines. The blasting network should be insulated from the earth. An intermediate switch should be installed between the electric blast network and the power supply. After all the four explosion zone networks are connected, the special instrument is used to test the resistance and meet the design requirements. The busbar and network connector shall be connected to the safety zone after the staff member has completely evacuated to the safety zone. After the security personnel issue a safety signal, the commander of the blasting officer issues a command to connect. 5 After the line is connected, no other personnel should enter the explosion area. 19. Post-blasting inspection and blind and residual gun handling methods and precautions 1 After blasting, there must be 15-30 minutes of enhanced ventilation time. After the guns are removed, the party is allowed to enter the work surface for inspection. It is strictly forbidden for a person to enter alone. 2 Enter the work surface should first install the lights, then check the safety of the top plate and the two gangs, and handle the top and help pumice . 3 It is found that blind and residual guns can be re-installed with explosives packs or left a certain distance to make parallel blasthole charges for blasting. Only water or bamboo tools are allowed when blinding or looting the blastholes. The minimum distance between parallel holes and residual blastholes should be less than 0.3 meters. Grey Iron Fitting,Cast Iron Bollards,Cast Iron Seating,Bollards And Seating Wuan City Kunyu Metal Products Co.,Ltd , https://www.kunyucasting.com