Comprehensive measures for mine fire prevention

(1) The mine shall formulate a plan for fire prevention work every season. The chief engineer of the mine shall be responsible for the arrangement of the fire prevention work according to the next quarter, and arrange the fire prevention work for the quarter, and the quarterly plan shall be implemented by the mine manager organization. The completion of the season plan, the end of each quarter report to the Bureau of Defense and the record for assessment.

(2) Reasonable choice of development layout and correct selection of mining methods

1. Use concentrated rock lane layout as much as possible, and minimize tunneling in the coal seam.

2, do not leave or leave coal pillars, such as retaining coal pillars, the size and roadway support should be reasonable to meet the standard requirements.

3. The mining face adopts backward mining, and the production connection time of the coal seam is reasonably arranged. After the formation of the coal seam face is formed, it should be put into production as soon as possible, and the production should be closed during the natural fire period; Coal pillars and top coal. When the coal mining face is taken to the stop line, measures must be taken to make the roof fall sharply. After the end of the nine-layer and three-layer stratified mining in the same section, the ten-layer and three-layer stratification should be mined in time to reduce the leakage time.

4, 3 under layer mining, 10 layer coal mining will use internal fault or overlapping layout mining.

(3) Strengthen ventilation management to minimize air leakage.

1. The correct position should be selected when the downhole ventilation structure (the damper, the damper, the closed wall) and the local ventilator are installed. All facilities that control wind flow should be installed in a section where the surrounding rock is strong and the ground pressure is stable. It should not be placed in the fracture zone and the roof area, so as to increase the air leakage and cause spontaneous combustion.

2. The main measures to prevent air leakage during coal pillar mining.

(1) Hanging curtains along the empty roadway. (2) Spray plastic foam to prevent air leakage. (3) Adopt “equal pressure” measures to reduce air leakage.

(4) When selecting the construction location of the ventilation facility, it is necessary to fully consider the requirements of pressure equalization ventilation to prevent a large pressure difference from forming on the return air side of the goaf; when selecting a pressure equalization ventilation fire prevention scheme, air volume and pressure are required. The adjustment and adjustment will gradually realize the transformation from qualitative management to quantitative management; strengthen the maintenance management of the main ventilation tunnels such as the upper and lower mountains in the use area, ensure the ventilation section, reduce the ventilation pressure, and prevent the leakage of oxygen to the goaf.

(4) Strengthen the management of the fire-fighting grouting system to ensure that the grouting system is perfect and reliable, and the grouting effect is ensured.

Strengthen the management of fire prevention systems and give full play to the role of existing grouting stations. The grouting system should be as good as the original design requirements. The pipeline system of the new level and new mining area must implement “three simultaneous” (ie, simultaneous design, simultaneous construction, and put into use at the same time), and the removal of the fire prevention pipeline must be approved by the group company.

1. Chazhuang Coal Mine mainly uses grouting to prevent fire extinguishing. At present, there are two sets of fire-proof grouting systems. The two systems are independent of each other, and the Beifengjing Grouting Station is responsible for the fire prevention and grouting work of the 3,200 east and west mining areas and the 3,900 mining areas. The mine grouting station is responsible for the fire prevention and grouting work of the 9100 and 10100 mining areas and the middle coal pillar mining area. It is necessary to establish and improve various rules and regulations, strictly implement the management responsibility system at all levels, and strengthen inspections to ensure that the mine fire prevention and extinguishment system is complete and reliable.

2. When stratifying on the 9th and 3rd floors, it is necessary to carry out preventive fire prevention work, and take the following measures:

1 With the mining and injection 2 goaf in the goaf 3 coal mining surface sprinkling 4 goaf spraying.

Immediately after the closing of the working face, the “two lines and one line” (ie, the inlet duct, the return duct, and the stop line) are grouted.

3. The grouting location, time, schedule, and grouting concentration must be implemented in accordance with the grouting plan. Grouting amount, complete grouting plan, strengthen fire-proof grouting for special locations.

4. When grouting in the working face or goaf, the spotting point must be checked by a special person. The person inspects the pipe of the grouting system and finds the problem in time.

(5) Strictly confined the quality to prevent air leakage and timely closure to prevent air leakage. With the promotion of the working face, it is necessary to close the rails, transport the middle, and contact the lanes in time; after the end of the working face, it is necessary to withdraw all equipment materials within a time limit, and close them as soon as possible. The removal or closure time should be recorded for future reference. The fire area must be sealed, and the "double wall clamped loess" should be sealed with MEA coal mine fire extinguishing agent. Make a face and a skirt, and observe the observation hole and the grouting hole.

(6) To carry out the work of predicting and forecasting fire prevention, it is necessary to strictly inspect the sealing of the coal seams in the coal seams in accordance with the regulations, and find out the problems in time for analysis and treatment. If the fires are not caused in time due to inspections, the inspectors and relevant administrative staff of the work area shall be investigated. Responsibility, the sampling and analysis of the specified locations should be carried out on a regular basis, and the inspection and analysis data should be retained for more than one year.

1. When stratification is carried out under the excavation 3, check whether there is CO in the return flow of the working face at least once in each shift. When mining the 3rd, 9th and 10th floors, check each class at least once for the CO in the return flow of the coal face. Gas is present.

2. The fire-proof and fire-tighting inspection workers shall conduct a comprehensive measurement of all the 3, 9 and 10-layer coal mining face into the wind angle at least once a week. The content of the test shall be: CO2 concentration and gas concentration in the inlet and return air angles. , water temperature, air temperature, CO gas; weekly inspection of all gas inside and outside the closed wall on the return air side, inspection content: gas concentration inside and outside the closed wall, CO2 concentration, temperature, CO concentration, in front of the closed wall Atmospheric pressure, etc., and timely analysis of the results of the weekly inspection, analysis of whether there are natural fire hazards, etc., and the results of the analysis reported to the mining technical department.

3. Conduct a comprehensive inspection of all closed walls of the whole mine every ten days, and analyze and summarize the inspection results.

4. Strengthen the management of the beam tube monitoring system and correctly arrange the monitoring points. The monitoring points are arranged on the return air flow side of the possible spontaneous combustion zone. Gas is collected periodically for analysis. The monitoring and monitoring points of the mining area are arranged in the rear goaf of the coal mining face, the return angle of the return face of the working face, the return flow of the return path of the working face, and the convergence point of other return flow of the mining area. In the incoming air flow of the coal mining face, a measuring point should also be arranged as the comparison of the gas components, which can eliminate the interference of other factors, and directly collect and analyze the records by using the beam tube device.

5. All test and analysis results must be recorded in a dedicated fireproof record book. Regular inspection and analysis will be carried out. When the natural ignition index exceeds or reaches the critical value such as the critical value, the natural fire prediction is immediately taken to take measures.

(7) When excavating the roadway, the roofing area appearing in the roadway must be fireproofed in time. Fill it with sand, loess or gel and check it regularly to prevent spontaneous fire.

(8) The mine must establish and improve the mine fire prevention system map and the fire prevention measures account, and report it to the group company for record.

(9) Strict fire prevention work assessment. The mine shall carry out unexpected inspections on the fire prevention work of each unit and incorporate it into the monthly assessment.

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