(1) The firing bar is short, and the shelter is not properly selected, causing coal and flying stones to injure people.
(2) During the shooting, the provisions of the “Safety Regulations for Coal Mines†regarding the firing of warnings were not implemented, and the personnel entering the shooting area were accidentally injured.
(3) The handling of the rifle was not operated in accordance with the procedures and methods stipulated in the “Safety Regulations for Coal Minesâ€.
(4) When the charging blasthole does not ring after power-on, the time to wait for entering the working surface is too short, or it is mistakenly considered to be a fault of the power grid and enters in advance, causing collapse.
(5) Failure to prevent stray currents, causing sudden explosions and collapse.
(6) The shooting system is not strict and the work is chaotic. It often happens when someone is working on the working face, and others use the explosive device to energize and release the gun, causing people to collapse.
Second, measures to prevent the collapse of the gun
(1) According to the "Safety Regulations for Coal Mines" and "Operational Regulations", the firing bar should have sufficient length. The choice of the shelter should be able to avoid the attack of flying stones and flying coal; the shelter should have sufficient strength.
(2) When shooting, the safety alert must be implemented in the “Safety Regulations for Coal Minesâ€.
(3) When the charging blasthole does not sound after power-on, if using the instant detonator, wait at least 5mi,; if you use the deferred electric detonator for at least 15 minutes, you can check along the line to find out why the gun does not ring. Enter the work surface to avoid the guns crashing.
(4) Take measures to avoid sudden explosions caused by stray currents.
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