GB/T 25285.2-2021 Explosive atmospheres—Explosion prevention and protection—Part 2:Basic concepts and methodology for mining

Scope

This document specifies the methods for explosion prevention and protection in the mining industry by outlining the basic principles and methods for the design and manufacture of mine equipment, protection systems, and components.
This document applies to Class I equipment, protection systems, and components intended for use in underground parts of mines and surface installations where there is a risk of gas and/or combustible dust.
Note: Detailed information on specific equipment, protection systems, and components is specified by corresponding professional standards. The design and implementation of explosion-proof measures require relevant safety data on combustible substances (materials) and explosive environments.
This document specifies methods for identifying and assessing hazardous situations that may lead to explosions, as well as design and structural measures adapted to safety requirements, achieved through the following aspects:
——Risk assessment;
——Risk reduction.
The safety of equipment, protection systems, and components can be achieved by eliminating hazards and/or limiting risks, namely by the following means:
a) Appropriate design (without safety protection devices);
b) Safety protection devices;
c) Use of information;
d) Any other preventive measures.
Explosion-proof measures corresponding to a) (prevention) and b) (protection) are addressed in Chapter 6 of this document, and those corresponding to c) are addressed in Chapter 7 of this document. Those corresponding to d) are not addressed in this document. They are addressed in GB/T 15706 (Chapter 6 in GB/T 15706—2012).
The prevention and protection measures specified in this document do not provide the required level of protection unless the equipment, protection systems, and components operate within their intended scope of use and are installed and maintained in accordance with the corresponding operating procedures or requ

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