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(I) Prevention of gas accumulation Gas accumulation refers to the phenomenon that the gas concentration accumulated in the space above 0. 5m 3 in the mining face and other roadways reaches 2%. The methods to prevent gas accumulation are:
1. Strengthen ventilation.
2. Conduct gas inspection and monitoring carefully.
3. Handle accumulated gas in a timely manner.
(II) Prevention of gas ignition The principle of preventing gas ignition is to eliminate all non-production heat sources, strictly manage and control the heat sources that may be generated in production, and prevent them from generating or limiting their ability to ignite gas. The main measures are:
1. It is strictly forbidden to bring tobacco and ignition articles to the well; people in the wells are strictly forbidden to wear chemical fiber clothes; it is strictly forbidden to use electric furnaces in the underground; it is forbidden to open the miner's lamp, and the use of explosion-proof safety lights should be used for lighting; the wellhead room, pumping pump room and ventilation room are prohibited within 20m. Open fire; when electric welding, gas welding and torch welding are required underground, strict approval procedures should be followed, and the relevant provisions of the Regulations should be observed. The management of underground fire areas must be strengthened.
2. Strengthen the management of shooting and pyrotechnics. Water cannon must be used in the mining face. When there is gas and coal dust explosion hazard of coal seam blasting operations, mining face must be used to obtain product licenses that permissible explosives and detonators mine allowable electricity. When the mine is allowed to use the millisecond delay electric detonator, the extension period of the last paragraph shall not exceed 130ms. The charge and seal volume of the blasthole must comply with the relevant requirements for safe blasting (see 1G420104 IV) ; open flames, common detonating cords, non-conducting blasting blasting and blasting are strictly prohibited in coal mines; bare blasting is strictly prohibited. The gas must be inspected before and before the shot. It is only allowed to release the gun when the gas concentration in the airflow is less than 1% within 20m near the shooting location.
3. The selection of underground electrical equipment should comply with the regulations; the operation, maintenance and repair of underground explosion-proof electrical equipment must meet the technical requirements of explosion-proof performance; underground electrical equipment (including cables and wires) must not be inspected and removed.
4. Prevent mechanical friction sparks from igniting gas.
5. Avoid static discharge caused by high-speed moving materials. Keep the mine ambient temperature below 40 ° C.
(III) Work requirements of gas inspectors A large number of facts show that almost all gas explosion accidents are directly related to gas inspectors' violations, violations of discipline and failure to take effective measures. To this end, gas inspectors must be required to:
1. Obey the rules and regulations, do not allow empty, leaking, and false inspections, hand over the shifts at designated locations in the underground, and strictly enforce the provisions of the Regulations on the number of inspections and inspections.
2. Understand and master the situation of gas emission and changes in the division of labor.
3. The key parts and locations with large gas and abnormal changes in the division of labor must be inspected and closely watched at any time. For the hidden dangers and dangers that may arise, we must have a sense of prevention ahead.
4. In order to be able to detect potential safety hazards such as gas accumulation and over-limitation in a timely manner, in addition to taking the initiative to take effective measures to properly handle it, it is necessary to notify the staff of the work and the team captain and the ground dispatch report.
5. Anyone who violates the regulations on violations of regulations, such as ventilation, dust control, and shooting, etc., in violation of the relevant provisions of the Regulations must dare to resist and stop.
Technical measures to prevent and control coal mine gas explosion disaster
Among the three conditions that must be met in the gas explosion, the last condition for the mine is always available, so the main measures to prevent gas explosion are to prevent the accumulation of gas and to prevent or limit the occurrence of fire sources and high-temperature heat sources.