What types of fire-fighting methods are commonly used for internal fires? How to implement?

The methods of extinguishing internal fires can be divided into four categories: direct fire extinguishing, insulated fire extinguishing, combined fire fighting and pressure equalizing fire extinguishing.

The direct fire extinguishing method is to directly extinguish the fire in the vicinity of the fire source with fire extinguishing equipment, generally using water or chemical fire extinguishing agent, foaming agent, inert gas, etc., or controlling the fire source.

The fire-extinguishing method is to build a closed wall in all the roadways leading to the fire area, and block the building closed wall in the roadway with loess, mortar and other materials, and block the cracks on the roadway wall with loess, mortar and other materials to fill the cracks in the ground subsidence area. To prevent air from entering the fire source, the fire is extinguished due to lack of oxygen.

There is no closed wall that is absolutely airtight. Therefore, if the isolation method is used alone, it will often delay the fire extinguishing time, and it is difficult to achieve the purpose of completely extinguishing the fire. The use of a closed wall to isolate the fire zone is an independent method of extinguishing fire only when it is not possible to use direct fire extinguishing or equipment that is not required for joint fire fighting.

The joint fire-fighting method is to first seal the fire area with a closed wall and then inject mud or other fire-extinguishing materials into the fire area. Grouting method in our country more used fire than the fruit well, in addition to perfusion beneficiation plant desulfurization tailings also have very good extinguishing effect.

Pressure regulator according extinguishing method is provided to adjust the ventilation system or, to reduce the leakage path across the wind pressure, reduction of air leakage, so that the fire extinguishing zone hypoxia Ore achieve autoignition.

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