What are the causes, treatment methods and preventive measures for various explosions during the blasting process?

Detonation type

cause

Approach

Precaution

Partial explosives refused to explode

(1) Explosives are damp;

(2) There are rock powders separated, affecting the explosion

(1) flushing out the explosive with water;

(2) remove the drug pack

(1) Waterproof or wet blastholes must be waterproofed;

(2) The blasthole should be purged before charging.

The detonator exploded and the explosives all refused

(1) Deterioration or dampness of explosives;

(2) Detonator detonation power is insufficient;

(3) Detonator and drug pack are separated

(1) Remove the blockage and reinstall the explosive charge to detonate;

(2) If it is a powdery medicine, use water to wash out the blockage and explosive, recharge and detonate

(1) Strictly inspect the blasting materials and take care of them;

(2) Waterproof or wet blastholes must be waterproofed;

(3) Detonators and kits in the primer should be tied

Detonators, detonating cords and explosives are all rejected

Electric detonator detonation

(1) The quality of the electric detonator is unqualified;

(2) The fuse is not neatly cut, the flame does not pass the detonator's primer or the detonator and fuse are left;

(3) Inadvertently causing injury to the fuse;

(4) Missing ignition

(1) carefully take out the blockage and reinstall the primer bag to detonate;

(2) carefully remove some of the blockages, reinstall the detonating kit, and detonate

(3) The blasthole detonated by the electric detonator and the detonating cord can be re-initiated;

(4) Chisel a parallel blasthole at a certain distance from the blasthole (shallow eye is not less than 0.3 m, open deep hole is not less than 2 m), refilling and detonating

(1) closely connecting the fuse to the fire detonator;

(2) When the charge is applied, the fuse is turned against the hole wall, and the gun stick is smashed.

(3) Be calm and careful when igniting, check the ignition sequence and the number of shots

Electric detonator detonation

(1) The quality of the electric detonator is unqualified;

(2) The electric blast network does not meet the conditions for detonation;

(3) Incorrect line connection, poor contact of the connector, grounding of the line

(1) The electric blast network must meet the requirements for permitting detonation conditions;

(2) Be careful and careful when connecting the network.

Detonating cord

(1) The quality of the detonating cord is unqualified;

(2) Detonating cable network connection error;

(3) The shock wave and the flying stone damage caused by the first explosion of the cable that is delayed in detonation

(1) Be careful when connecting the line, and take the correct method;

(2) The detonating cord of the deferred detonation shall be strengthened to avoid damage caused by the first impact.