In order to strengthen our mine recovery during and after mining goaf management to ensure long-term production of coal mine I am safe and orderly manner, formulated measures are as follows:
First, the management method of goaf:
1. Choose a reasonable development system and mining method, improve and improve the ventilation system, and reduce the ventilation resistance of the mine. Strictly implement the ventilation management system, reasonably select the location of the ventilation facilities, avoid artificially increasing the pressure difference in the goaf, and cause air leakage in the goaf.
2. Closing the goaf and abandoned roadway in time, the coal mining face at the end of the mining must be promptly withdrawn from all equipment, and all the roadways leading to the gob area shall be completed within 45 days with quality and quantity.
3. The ventilation team is responsible for the uniform numbering of all permanent closed walls leading to the goaf, the establishment of a ledger, and the contents of the closing time, the material of the closed wall, the thickness, the specifications, and the person in charge of the construction.
4. The ventilation team is responsible for setting fences, revealing warning signs, hanging cards, inspection boxes, and checking holes and measures holes on the closed wall before closing all the goafs.
5. Check and analyze the closed wall on time. The team of the ventilation team is responsible for the permanent closure of all goafs and the integrity of the closed wall of the fully mechanized mining tail roads and the gas inspection. The wind measurement group is responsible for the internal and external gas, carbon dioxide, carbon monoxide, oxygen, temperature and other parameters of the closed wall. The inspection and inspection are carried out. The gas team arranges personnel to check the gas condition before the closing of the goaf. All inspectors fill in the inspection results and the board, and report the abnormal situation in time according to the procedure.
6. Do a good job in the gas component testing in the goaf. Every 5 days, the ventilation section of the ventilation department will sample the gas in the goaf, and send the sample to indicate the sampling location, location, time, etc.; the monitoring team is responsible for the laboratory analysis and the data. The test order archive is retained. When it is found that the temperature in the goaf is rising and the detection of carbon monoxide exceeds the regulations, it will be reported to the dispatching department, the chief of duty, and the chief engineer of the mine immediately, ascertain the cause, take effective measures in time, and summarize the relevant situation.
7. Strengthen the management of the goaf in the mining face. There must be no two open air return traversing, only one transverse traverse is allowed as the only return air traverse, and the remaining traverse must be closed by permanent airtight or Rocky closed. The "Y-type" ventilated working face strengthens the pressure pipe of the closed wall along the empty roadway, and the "U-shaped" ventilated working face is strengthened to drop the buried pipe to prevent the air leakage in the goaf, resulting in the gas-filled roadway or the falling hills. Large, and strengthen the management of the downhill corner, the returning wind support and gas, the gas team is responsible for the implementation of measures to prevent the occurrence of friction and sparks and implementation.
8. In case of abnormal goaf, take effective measures in time, and establish an abnormal gob management card. The card should record the abnormal date, cause, location, treatment process, and the original ventilation system map, indicating the relevant ventilation facilities. Strengthen the management of closed-wall listing. The contents of the plates include gas, carbon monoxide, concentration, carbon dioxide, date of measurement, and name of the measuring personnel inside and outside the closed wall.
Second, security technical measures:
(1) Safety technical measures for the goaf in the mining face:
1. According to the characteristics of long-wall coal mining method adopted by our mine, all the slumping methods are used to manage the goaf; before the production is put into operation, the detailed and feasible “Safety Technical Measures for Initial Mining and Initial Caving of Fully Mechanized Mining Faces†and “Comprehensive Mining†Gas control measures during the initial mining of the working face.
2. During the mining process, observe the collapse of the roof of the goaf, and find that special measures should be made when the suspended ceiling of the goaf is serious, slow down the speed of the working face and disassemble the head of the working face, the tail bolt and the anchor cable. The roof of the goaf is slowly sinking to avoid damage to personnel and equipment caused by large-scale collapse of the top plate.
3. Monitor the air leakage in the goaf at any time, and hang the wind barrier on the wind side of the working face to reduce the air intake in the goaf and reduce the natural fire hazard in the goaf.
4. Check the sealing situation between the working face and the adjacent working face or the standby working face every seven days, and find that the problem is maintained in time to ensure that the airtightness does not leak.
5. During the mining period, the beam monitoring is carried out on the goaf, and a set of data is measured every day to observe the fire parameters such as carbon monoxide concentration and gas concentration in the goaf.
6, 2#, 3#, 5# coal seam mining face is cut by a knife coal to the head of the mining face, the tail of the machine 20 meters and the face of the working face are sprayed with the inhibitor.
7. During the recovery of the working face, the yellowing of the goaf is carried out according to the spontaneous combustion and the fire condition of the goaf in the working face and the monitoring data of the beam tube to prevent the goaf from catching fire.
8. Regular maintenance on fire protection systems and equipment. The maintenance and maintenance of the inhibitor pump and the yellow mud grout pump should be strengthened daily to ensure that all kinds of fire prevention measures can be put into use at any time.
(2) Safety management measures for the mined-out area of ​​the working face:
1. During the stop mining and retracement of the coal mining face, the wind volume of the working face should be reduced in time; after the mining is stopped, the gas in the goaf is monitored by the beam tube, and at least one set of data is measured every day; after the mining face is finished, it should be The withdrawal is completed within 40 days.
2. The closed work of the goaf should be completed within 45 days after the end of the working face. Permanently seal in all roadways connected to the goaf. The closure of goaf is the development of special closure measures and closed construction safety technical measures.
3. Set the beam tube monitoring probe in the closed area of ​​the goaf, establish a closed management and inspection system for the goaf, and check the parameters such as the temperature inside and outside the closed air, carbon monoxide concentration and gas concentration every day to establish a ledger.
4. The closed goaf should be filled with gas in the buried pipe, and the returning pool should be set under the closed.
5. Check the fire parameters such as temperature inside and outside the closed working face, carbon monoxide concentration and gas concentration every five days, and find out the spontaneous combustion of the goaf in time to take timely measures to prevent fire.
6. When the closed working surface is found to be angry, use yellow mud grouting method to extinguish the fire, and formulate corresponding special safety technical measures according to the specific conditions of the goaf.
7. Other places not covered shall be strictly implemented in accordance with the “Safety Regulations for Coal Minesâ€, “Operational Regulations†and relevant regulations.
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