First, first-class security.

The first-class safety is the highest safety level in non-coal mines. Under the first-class safety, the mine safety control measures are very strict, which ensures the safe operation of the mine.

This includes comprehensive evaluation and monitoring of mine geological environment, hydrogeological conditions and mine engineering structure, as well as training and safety education for mine personnel.

Second, secondary security.

Secondary security is to slightly relax some security requirements on the basis of primary security. The mine still needs to take a series of safety control measures under the second-level safety, but it may have some moderate flexibility compared with the first-level safety.

However, the mine still needs to maintain a high degree of vigilance and safety awareness to ensure the safe operation of the mine.

Third, three-level security

Three-level safety is the basic safety level of non-coal mines. Under the three-level safety, the mine needs to follow certain safety management regulations and operating procedures to ensure that the basic safety requirements of the mine are met.

This includes basic safety monitoring and management of mine environment, equipment and operators, so as to reduce accident risks and ensure personnel safety.

Harmful factors in non-coal mines

I. Lifting injury

In the production process of non-coal mines, there are a large number of lifting equipment in mineral processing workshops and machine maintenance workshops, and the probability of lifting injury is relatively high. The main risk factors are broken traction chain or sliding parts, collision, emergency stop, etc. The accidents caused by this include equipment destruction, casualties and production impact.

The common causes of lifting injuries are: overload; The traction chain or product does not meet the specified quality requirements; Operating lifting equipment without a license or operating personnel violating regulations; The volume of the transported object is too large; Sudden power failure; Lifting equipment failure, etc.

In the production process, there are still dangerous and harmful factors such as pressure vessel explosion, high temperature, corrosion, lightning strike, earthquake and poor lighting.

Second, radiation hazards.

Generally, non-coal mining, even if it is not a mine that produces radioactive ores such as uranium, also contains trace radioactive substances, such as radon.

Radon is the result of the decay of 226 radium atoms. This decay is natural, and people can't control it, so the generation of radon is continuous, and the process of radon running from rocks to the air is also continuous.