1 coal spontaneous combustion prevention technology
Including the coal spontaneous combustion prevention technology: inert, sealing, cooling, and their combination. Inert gas is inert gas or other inert substances into the treatment area, inhibition of coal spontaneous combustion technology. Mainly includes the yellow mud grouting, fly ash, inhibitor and the inhibition of mud and inert gas etc.. Plugging is to reduce or eliminate the coal column and Goaf Air Leakage adopt certain technical measures, the coal spontaneous combustion in hypoxia but not. Plugging technology and materials mainly include: compressive cement foam, gel plugging technology, tailings sand plugging and pressure etc..
2, management and open fire closure
Fire closure. When the measures of fire - prevention failure or due to rapid fire too late to take direct measures, we need closed fire zone timely, prevent fire situation to expand. The fire closed is smaller, less oxygen to support combustion, fire extinguishments and faster, so the fire closed as far as possible to narrow the scope of, and as far as possible to reduce the number of firewall. In order to facilitate the isolation zone, should first closed or closing the inlet side of the firewall, and then close the return air side, at the same time, the main channel also should give priority to closed fire zone for wind (or main airflow), lateral duct and then closed the fire zone for wind (or lateral flow).
Fire management. Closed after the fire, before the fire completely extinguished the fire not, should strengthen the management. Fire management technology includes of fire data analysis, sorting and the fire observation inspection work. To draw the fire location map, showing all fire and once ignition location, and indicate the number of fire, firing time, location, main monitoring gas composition, concentration. Must be tailored to each fire district, fire management card are built, including fire, fire extinguishing material registration form filling record and firewall observation record table.
Firearea unsealing. Only by sampling analysis confirmed, also meet the following conditions, may be that the fire has been extinguished, then can be unsealed:
In the fire area temperature dropped to 30 ℃ below, or with the fire front air daily temperature of the region of the same;
The oxygen concentration in the fire area dropped to 5% the following;
Ethylene, acetylene containing no fire in the air, carbon monoxide decreased gradually in the closed period, and stable under 0.00l%;
In the water temperature zone below 25 ℃, the daily water temperature occurs before the area or the same with fire.
Requirement of the above 4 indexes remained stable in 1 months time.
3 fire period strain and disaster relief technology
Fire period strain and relief technology includes airflow control technology, the anti wind technology and prevent fire expand technology.
Airflow control technology is a reasonable choice to strengthen the ventilation system, ventilation management, reducing air leakage.
Mine reverse ventilation technology refers to the underground fire situation, in ensuring the safety conditions of workers and major equipment facilities, can use local anti wind or the whole anti wind method.
Method of preventing fire expanding technology are: isolation method (the Fire District closed interval is separated from the other non fire zone), asphyxia (fire zone completely closed, blocking the oxidizer (air, oxygen, etc.) so that the fire stop), the grouting fire (the mud into the primary fire, make fire is mud the parcel, cut off from the air, to prevent the further spread of the fire retardant), fire (the resistance agent sprayed on fire on or into the combustion in vivo, to inhibit or retard the oxidation, ignition material to prevent fire expansion purposes).
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