1. Ventilation safety monitoring equipment

Article 1 The safety monitoring system shall have functions such as analog quantity, switching quantity, cumulative quantity acquisition, transmission, storage, processing, display, printing, sound and light alarm, and control, etc., which are used to monitor methane concentration, carbon monoxide concentration, wind speed, wind pressure, temperature, smoke, feed status, damper status, local fan start and stop, main fan start and stop, and realize sound and light alarm for methane overrun, power outage and methane wind power lockout control (Article 3.1 of AQ6201-2019).

Article 2 When the main engine or system cable fails, the system must have all functions of the methane cut-off instrument and the methane wind power blocking device; the safety monitoring equipment must have a fault blocking function; the input and output signals between the explosion-proof safety monitoring equipment must be intrinsically safe signals (Article 160 of the Regulations).

Article 3 The maximum inspection period of the safety monitoring system shall not exceed 30 seconds and shall meet the monitoring requirements (Article 4.7.4 of AQ6201-2019); the control time shall not exceed the maximum inspection period of the system. The off-site control time shall not exceed twice the maximum inspection cycle of the system. The control execution time for methane over-limit power outage and methane wind power lockout shall not exceed 2 seconds (Article 4.7.5 of AQ6201-2019).

Article 4 The real-time monitoring values of important measuring points such as methane, temperature, wind speed, negative pressure, and carbon monoxide shall be saved for more than 7 days. Statistical values of analog quantities (5-minute values), alarms, power outages, abnormal power feeding, changes in operating status of fans, dampers, and wind pipes, cumulative quantities of gas drainage volume, equipment failures, etc. shall be kept for more than 1 year. When the system fails, the time for losing data shall not exceed 5 minutes (Article 4.7.7 of AQ6201-2019); the software must have the function of preventing modification of stored content such as real-time data and historical data (Article 4.6.6 of AQ6201-2019); the system must have a data backup function (Article 4.5.11 of AQ6201-2019).

Article 5 The software can realize the automatic display and record query functions of analog quantities and switching quantities, power outages, power supply abnormalities, and status changes (Article 4.6.7/8 of AQ6201-2019); The software has analog quantity curve display, switching quantity status diagram and histogram display, and equipment layout simulation diagram display functions (Article 4.6.9/10/11 of AQ6201-2019); the system has the function of printing various analog quantity reports and switching quantity reports (Article 4.6.14 of AQ6201-2019); the software shall have the function of storing (manually filled in alarm information, power outage, power supply abnormality and other alarm information comment reasons)(Article 4.6.13 of AQ6201-2019). It is strictly prohibited to use networked data upload programs with blocking, filtering and measuring point selection functions to ensure that all monitoring data are uploaded normally (Article 5 of the Group's Document "Safety Monitoring Management Regulations").

Article 6 The analog alarm, power outage and abnormal power feeding information of the system must be displayed in real time (Article 4.6.7.2 of AQ6201-2019). When the analog quantity monitoring value exceeds the limit, the power feeding is abnormal, or the switching quantity status is an alarm state, the system will emit an audible (alarm sound or voice prompt) light (graphics or numbers turn red or flash red) alarm signal (Article 4.6.12 of AQ6201-2019).

Article 7 The time for switching to normal operation between the system working host and the standby host shall not be more than 5 minutes (Article 4.7.12 of AQ6201-2019); the response time for 85% of the entire screen displayed by the system shall not be more than 2 seconds, and the rest of the screens shall not be more than 5 seconds (Article 4.7.8 of AQ6201-2019).

Article 8 The system must have lightning protection function. Lightning protection measures shall be taken at the transmission interface, inlet wellhead, power supply, etc.(Article 4.5.13 of AQ6201-2019); central station equipment shall have reliable grounding devices and lightning protection devices (Article 9.1.3 of AQ1029-2019).

Article 9 The safety monitoring system shall be backed up by two machines, with dual circuit power supply and equipped with an on-line uninterrupted power supply for not less than 2 hours (Article 9.1.1/2 of AQ1029-2019); after a power outage, the backup power supply shall be able to ensure that the system's continuous monitoring time is not less than 2 hours (Article 4.7.13 of AQ6201-2019).

Article 10 The central station shall use recorded phones, and the networked host computer shall be equipped with firewall and other network security equipment (Article 9.1.4/5 of AQ1029-2019).

Article 11 Coal mines must select sensors, power-off controllers and other associated equipment of monitoring systems according to the models specified in the mining product safety sign certificate, and it is strictly prohibited to replace equipment between different systems (Article 4.5 of AQ1029-2019).

Article 12 The stability of the sensor shall not be less than 15 days (Article 4.4.2.2 of AQ6201-2019), and the transmission distance between the sensor and actuator and the substation shall not be less than 2km; the maximum transmission distance between the substation and the transmission interface shall not be less than 10km (Article 4.7.10 of AQ6201-2019). Mines shall be equipped with spare parts for safety monitoring equipment such as sensors and sub-stations, and the spare quantity shall not be less than 20% of the quantity to be equipped (Article 8.6 of AQ1029-2019).

2. Ventilation safety monitoring equipment settings

Article 13 The design of mining area, mining operation procedures and safety technical measures must clearly define the type, quantity and location of safety monitoring equipment, the laying of signal cables and power cables, power outage areas, etc., and draw layout plans and power outage control diagram (Article 5.1 of AQ1029-2019).

Article 14 The power supply of safety monitoring equipment is strictly prohibited from being connected to the load side of the controlled switch. Special power supply should be provided for underground safety monitoring equipment (Article 5.5 of AQ1029-2019).

Article 15 The analog quantity sensor shall be set in a position that can correctly reflect the physical quantity being measured; the switching quantity sensor shall be set in a position that can correctly reflect the monitored state; the sound and light alarm box shall be set in a place where people often work and are easy to observe (Article 5.8 of AQ1029-2019). The power supply status should be monitored by using contact (power supply status sensor) wiring (Article 3 of the Group Document "Safety Monitoring Management Regulations").

Article 16 Methane, carbon monoxide, and temperature sensors shall be suspended vertically, no more than 300mm from the top and no less than 200mm from the lane wall. They shall be easy to install and maintain and will not affect pedestrians and driving vehicles (Articles 6.1, 7.1.1 and 7.6.1 of AQ1029-2019).

Article 17 Mining working face, return air lane, upper corner, special return air lane; strung area with series ventilation; mining area return air lane, primary return air lane and main return air lane (wind measuring station) and their temporary construction of electrical equipment; inlet side of electromechanical chamber in the return air flow; coal loading point in the main transportation lane of stringing electric locomotive; When stringing electric locomotive is used in the main transportation lane on the air inlet side of high-gas mines, gas flows out of the downwind of the roadway; A shaft equipped with a belt conveyor that also serves as a return air shaft; above the underground coal bunker; outside the downwind fence in the underground temporary gas extraction pump station, in the extraction pump station and gas extraction pipeline; ground washing coal yard. Methane sensors must be installed in all the above areas in accordance with the provisions of paragraph 6 of AQ1029-2019, and alarm, power outage, restoration concentration and power outage range must be correctly set.

Article 18 Coal mining machines and boring machines (continuous mining machines) must be equipped with an airborne methane cut-off instrument or a portable methane detector (Articles 169/170 of the Regulations). Mining explosion-proof special battery electric locomotives must be equipped with vehicle-mounted methane cut-off instruments or portable methane detection alarm instruments; mining explosion-proof diesel locomotives must be equipped with portable methane detection alarm instruments (Article 6.9 of AQ1029-2019). When the gas concentration exceeds 0.5%, the locomotive must be stopped (Article 173 of the Regulations).

Article 19 Mining working faces, mining areas return air lanes, one-wing return air lanes, general return air lanes, downwind side of belt conveyor rollers, natural combustion observation points, and enclosed fire areas. Outside the firewall fence. Carbon monoxide sensors must be installed in the above areas in accordance with the provisions of paragraph 7.1 of AQ1029-2019, with an alarm concentration of 0.0024% CO.

Article 20 Mining coal seams that are prone to spontaneous combustion and spontaneous combustion and coal mining faces with high ground temperatures shall be equipped with temperature sensors 10-15m at the return air outlet, with an alarm point of 30℃; temperature sensors shall be equipped in electromechanical chambers, with an alarm point of 34℃ (Article 7.6.2/3 of AQ1029-2019).

Article 21 Wind speed sensors shall be installed at the wind measuring stations in the return air lane of the mining area, the return air lane of the first wing, and the main return air lane. Its location is a place where there is no branch airflow, no turning, no obstacles, no change in cross-section within 10 meters before and after the tunnel, and the air volume can be accurately calculated. When the wind speed is lower than or exceeds the specified value, an acoustic and light alarm signal shall be issued (AQ1029-2019, Paragraph 7. Article 2).

Article 22 A wind pressure sensor shall be installed in the wind tunnel of the main fan (Article 7.3 of AQ1029-2019).

Article 23 Smoke sensors shall be installed 10-15 meters from the downwind side of the belt conveyor roller (Article 7.5 of AQ1029-2019).

Article 24 Switch sensor must be installed on main ventilators, local ventilators, and main air doors in main inlet and return airways in mines and mining areas; in order to monitor whether the gas exceeds the limit of the controlled equipment and whether the power is cut off, the load side of the controlled switch must be set. Feed sensor (Clause 7.7 of AQ1029-2019). In high-gas areas in high-gas, outburst mines and low-gas mines, wind duct sensors must be installed at the end of the wind duct in the tunneling working face; when the air supply distance of the tunneling working face of low-gas mines is greater than 1000m, wind duct sensors must also be installed at the end of the wind duct (Article 3 of the Group Document "Regulations on Safety Monitoring and Management").

Article 25 Flow sensors, temperature sensors and pressure sensors should be installed in the suction pipeline of the extraction pump of a gas extraction pump station. When using gas, flow sensors, temperature sensors and pressure sensors should also be installed in the output pipeline. A differential pressure sensor should be provided on the anti-flashback safety device (Clause 7.4 of AQ1029-2019).

Article 26 In addition to being set up in accordance with the above national standards, monitoring equipment must also be added in accordance with the following regulations of the group.

1. Article 3 of Shenhua 'an [2010] No. 132:

1. If electrical equipment is installed in the return air contact lane, it must be managed as a chamber, and methane sensors must be installed;

2. The normal operation of safety monitoring equipment must be ensured for mining working faces and standby coal mining working faces that are temporarily suspended;

3. Before the installation and trial production of the mining face is completed and before the start of the excavation face, safety monitoring equipment must be installed and production can be started only after it is accepted by the mine ventilation and safety supervision (inspection) department.

4. During the withdrawal process of the coal mining face after the end of mining, the monitoring scope must be adjusted and improved in a timely manner. Safety monitoring equipment must not be recovered before the working face is closed.

2. Shenhua 'an [2011] No. 761 provides:

1. Methane sensors and oxygen sensors must be installed at the return air corner of the coal mining face. The sensor is set at:The top cutting line at the return air corner of the coal mining face is ≤800mm outward (towards the side of the working face), ≤300mm away from the top, and ≤500mm away from the coal wall; the alarm concentration of methane sensor is ≥1.0%, the power outage concentration is ≥1.5%, and the power restoration concentration is ≤ 1.0%; the power outage range is:All non-intrinsically safe electrical equipment in the coal mining face and its return air roadway; the alarm concentration of the oxygen sensor is ≤18.0%.

2. In the coal mining face of coal and gas outburst mines, methane sensors must be installed at a position not more than 10m from the air inlet tunnel away from the working face. Their alarm concentration and power-off concentration are both ≥0.5%, and the re-electricity concentration is <0.5%; the power-off range is:All non-intrinsically safe electrical equipment in the air inlet lane.

3. Methane sensors must be installed at wind measuring stations in intake lanes of mining areas of coal and gas outburst mines, with alarm concentrations ≥0.5%.

4. Methane sensors must be installed 10m to 15m on the downwind side of the gas drainage borehole construction site. Their alarm concentration and power outage concentration are both ≥1.0%, and the recovery electricity concentration is <1.0%; the power outage range is:All non-intrinsically safe electrical equipment in the construction site of the drilling site and its return air flow.

5. Methane sensors must be installed at 10 - 15m at the return air outlet of special gas control lanes (excluding special gas exhaust lanes). Their alarm concentration and power outage concentration are ≥1.0%, and the power restoration concentration is <1.0%; power outage range is:All non-intrinsically safe electrical equipment in the roadway.

6. For unenclosed and unventilated single-ended roadways, methane sensors, carbon monoxide sensors and oxygen sensors must be installed at the fence at the entrance of the roadway. The alarm concentration of methane sensor is ≥1.0%, the alarm concentration of carbon monoxide sensor is ≥24ppm, and the alarm concentration of oxygen sensor is ≤18.0%.

7. During operations such as closed construction or demolition of blind lanes and goaf areas, methane sensors, carbon monoxide sensors and oxygen sensors must be installed at the construction site. The alarm concentration of methane sensor is ≥1.0%, the alarm concentration of carbon monoxide sensor is ≥24ppm, and the alarm concentration of oxygen sensor is ≤18.0%.

8. If individual electromechanical equipment underground is located in the return air flow and is not within the monitoring range of the safety monitoring system, methane sensors must be installed at the electromechanical equipment setting point. The alarm concentration is ≥0.5%, the power outage concentration is ≥0.7%, and the complex electricity concentration is <0.5%; the power outage range is:Electrical equipment power supply.

9. Carbon monoxide sensors and smoke sensors must be installed on the downwind side of the electromechanical chamber. Carbon monoxide sensor alarm concentration ≥24ppm.

10. Carbon monoxide sensors and smoke sensors must be installed 10m to 15m on the downwind side of the belt conveyor roller. Carbon monoxide sensor alarm concentration ≥24ppm.

11. In mines where hydrogen sulfide gas flows out, hydrogen sulfide sensors must be installed in areas where hydrogen sulfide flows out large. The specific installation quantity and location shall be determined by the mine or subsidiary (branch) company.

Article 27 Before use and after overhaul, safety monitoring equipment must pass the test and debugging according to the requirements of the product instructions, and be put into the well for installation and use after trial operation for 24-48 hours on the ground (Clause 8.3.2 of AQ1029-2019).

3. Maintenance and use of ventilation safety monitoring equipment

Article 28 The safety monitoring system must operate continuously 24 hours a day, and the data or status of the system sensors shall be transmitted to the ground host (Clause 4.2/4 of AQ1029-2019).

Article 29 The installed number, location and location of sensors such as methane, power supply, equipment start and stop, wind pressure, wind speed, carbon monoxide, smoke, temperature, damper, and air duct must meet the requirements. The safety monitoring equipment must be regularly adjusted according to the requirements of the instructions for use to ensure accurate data and reliable power outages. The methane sensor in use should be calibrated underground, and the gas power-off blocking function should be tested at the same time as the calibration (Coal Safety Supervision Technology Equipment [2019] No. 29 Document).

Article 30 Safety monitoring equipment must be debugged and corrected regularly, at least once a month (Article 162 of the Regulations). The methane overrun power outage lockout and methane wind power lockout functions must be tested every 10 days (Article 8.3.6 of AQ1029-2019).

Article 31 Underground safety monitoring workers must be on duty 24 hours a day (Article 8.4.1 of AQ1029-2019); The safety monitoring equipment and cables must be checked every day to see whether they are normal, a portable methane detection alarm instrument or a portable optical methane detector must be used to compare with the methane sensor, and the record and inspection results must be reported to the monitoring attendant; When the reading error of the two is greater than the allowable error, safety measures shall be taken based on the larger reading and the adjustment of the two equipment must be completed within 8 hours (Article 163 of the Regulations).

Article 32 When the backup power supply cannot ensure continuous operation of the equipment for one hour after a power outage, it shall be replaced in time (Article 8.4.8 of AQ1029-2019). If the substation, sensors and other devices of the safety monitoring system are operating continuously underground for 6 to 12 months, they must be raised for maintenance (Article 8.3.7 of AQ1029-2019).

Article 33 When removing or changing the power lines and control lines of electrical equipment associated with safety monitoring equipment, repairing electrical equipment associated with safety monitoring equipment, and requiring safety monitoring equipment to stop operating, it is necessary to report to the mine dispatching room and formulate safety measures. Only then can it be carried out (Article 161 of the Regulations).

Article 34 The use and management of sub-stations, sensors, sound and light alarms, power-off controllers and cables used underground shall be the responsibility of the district leader and team leader in the area where they are located (Article 8.4.5 of AQ1029-2019). For sensors, sound and light alarms, power breakers, cables, etc. that need to be moved frequently, the mining team leader is responsible for moving them according to regulations, and it is strictly prohibited to stop using them without authorization (Article 8.4.4 of AQ1029-2019). The driver is responsible for monitoring and maintaining the machine-mounted power-off instrument installed on the shearer, boring machine and electric locomotive. When abnormalities such as readings are found, the monitor must be immediately contacted for treatment (Article 8.4.3 of AQ1029-2019).

Article 35 When the downhole management personnel discover that the reading error between the portable methane detector and the methane sensor is greater than the allowable error, they shall immediately notify the safety monitoring department for treatment (Article 8.4.2 of AQ1029-2019). If the sensor still exceeds the specified value after calibration, it must be replaced immediately; if the safety monitoring equipment fails, it must be dealt with in a timely manner. During the replacement and fault handling, safety measures such as manual monitoring must be adopted, and the fault record must be filled in (Article 8.4.6 of AQ1029-2019).

Article 36 Sensors in use should be wiped frequently to remove dust on the outside and keep them clean. The sensors on the mining face should be removed from dust every day; the sensors should be kept dry to avoid getting wet with water; the sensors should be maintained and moved to avoid being knocked and collided (Article 8.4.9 of AQ1029-2019); After the low-concentration methane sensor is impacted by methane gas greater than 4%, it should be adjusted or replaced in time (Article 8.4.7 of AQ1029-2019).

4. Basic management of ventilation safety monitoring

Article 37 Coal mines shall establish safety monitoring and management agencies. The safety monitoring and management organization shall be led by the main technical person in charge of the mine and shall be equipped with sufficient personnel (Article 10.1 of AQ1029-2019). Safety monitoring workers, maintenance and duty personnel shall be trained and certified (Article 10.3 of AQ1029-2019).

Article 38 Coal mines shall formulate rules and regulations such as gas accident emergency plans, job responsibility systems for safety monitoring personnel, operating procedures, and duty systems (Article 10.2 of AQ1029-2019). Coal mining enterprises shall establish a safety instrument measurement and inspection system (Article 157 of the Regulations).

Article 39 A coal mine shall establish a safety monitoring equipment maintenance room to be responsible for the installation (debugging), adjustment, maintenance and simple repair of the mine's safety monitoring equipment (Article 8.1.1 of AQ1029-2019). The maintenance room should be equipped with calibration device, regulated power supply, oscilloscope, frequency meter, signal generator, multimeter, standard gas, etc.(Article 8.1.3 of AQ1029 -2019).

Article 40 Coal mines shall establish the following account cards and reports:Safety monitoring equipment account, safety monitoring equipment fault registration form, maintenance records, inspection records, sensor adjustment records, central station operation log, safety monitoring daily report, alarm power outage record monthly report, methane overrun power outage lockout and methane wind power lockout function test records, monthly report on the use of safety monitoring equipment, etc.(Article 10.4.1 of AQ1029 -2019). Coal mine safety monitoring layout and power outage control diagram must also be drawn and revised in time according to changes in the mining face (Article 10.5 of AQ1029-2019).

Article 41 When mine leaders, mine technology leaders, mining area leaders, ventilation area leaders, engineering technicians, shift (work) leaders, blasting workers, mobile electric fitter, and safety monitoring workers go down the well, they must carry portable methane detection alarm instruments and portable oxygen detection alarm instruments; when gas inspectors go down the well, they must carry portable methane detection alarm instruments, portable optical methane detectors, portable carbon monoxide detection alarm instruments and portable oxygen detection alarm instruments; Safety supervision (inspection) personnel must carry portable methane detection alarm instruments, portable carbon monoxide detection alarm instruments and portable oxygen detection alarm instruments when going down the well; other requirements that need to be equipped with portable gas detection alarm instruments shall be determined by the chief engineer of the mine according to on-site management needs (Article 3 of the Group Document "Safety Monitoring Management Regulations").

Article 42 Full-time personnel must be set up to be responsible for the charging, receiving, and maintenance of portable methane detection and alarm instruments. The coal dust on the flame-proof cover must be cleared for each shift. The zero point and voltage or power supply undervoltage value of the portable methane detection alarm instrument must be checked before distribution. If it does not meet the requirements, it is strictly prohibited to distribute and use (Article 165 of the Regulations).

V. Processing of ventilation safety monitoring information

Article 43 The duty of the ground central station shall be located in the mine dispatching room, and a 24-hour duty system shall be implemented. The personnel on duty should carefully monitor the various information displayed on the monitor, fill in the operation log, print the daily safety monitoring report, and report it to the main person in charge of the mine and the main technical person in charge for review (Article 9.2.1 of AQ1029-2019).

Article 44 When the system sends out alarm, power outage, or abnormal power supply information, the person on duty at the central station must immediately notify the mine dispatching department to find out the reason, and promptly report it to the higher-level network center in accordance with the prescribed procedures. The processing results shall be recorded and filed (Article 9.2.2 of AQ1029-2019). After receiving the alarm or power outage information, the dispatch personnel should immediately report to the mine duty leader. The mine duty leader will command the on-site personnel to stop work according to regulations and evacuate personnel when the power outage is cut. The processing process shall be recorded and filed (Article 9.2.3 of AQ1029-2019).

Article 45 The network center must be staffed 24 hours a day. The personnel on duty should carefully monitor the monitoring data, check the handling of hidden dangers uploaded by the coal mine, fill in the operation log, print a daily alarm information form, and report it to the leader on duty for review. If any abnormalities are found, inquire in detail and handle them according to regulations (Article 9.3.2 of AQ1029-2019).

Article 46 The personnel on duty in the network center must immediately notify the coal mine of the verification situation if they discover an alarm of gas exceeding the limit of the limit or abnormal power supply status, and handle it in accordance with the emergency plan (Article 9.3.3 of AQ1029-2019).

Article 47 After receiving the alarm processing instructions issued by the network center, the personnel on duty at the central station of the coal mine safety monitoring system must immediately implement them and feed back the processing results to the network center (Article 9.3.4 of AQ1029-2019).

Article 48 If the personnel on duty in the network center discover that the communication of the coal mine safety monitoring system is interrupted or there is no record, they must find out the reason, issue handling opinions according to the specific circumstances, record and file the handling situation, and report it to the leader on duty (Article 9.3.5 of AQ1029-2019). The network center shall conduct a monthly summary and analysis of gas overrun conditions (Article 9.3.6 of AQ1029 -2019).

Article 49 Mine safety monitoring management personnel and production dispatchers must conduct a summary and analysis of the operation of the mine safety monitoring system once a day, and submit a written report to the mine manager and chief engineer before the morning dispatch meeting, which will be reviewed and signed by the mine manager and chief engineer (Article 4 of the Group Document "Safety Monitoring Management Regulations").

Article 50 In addition to being managed in accordance with the above national standards, it must also be managed in accordance with the requirements of Shenhua 'an [2011] No. 762 Document.

1. Each branch, subsidiary and coal mine must designate departments, clarify responsibilities, allocate sufficient full-time management personnel, and implement full-time duty 24 hours a day.

2. All branches, subsidiaries and coal mines must strictly follow the provisions of the "Technical Requirements for Networking of Coal Mine Safety Production Monitoring Systems"(MT/T1116-2011) and the "Shenhua Group Coal Mine Safety Monitoring Networking Interface Data Standard" to improve the safety monitoring networking system, define measuring points, standardize the transmission file format and mine name; summarize and analyze the uploaded data every week to ensure the integrity, accuracy, continuity and real-time nature of the data upload.

3. The 24-hour duty personnel of the safety monitoring and management organization of each component company must print the daily alarm information form on time and report it to the chief engineer for review and signature.

4. Each branch, subsidiary and coal mine must trace and handle safety monitoring alarm information and system failures within 24 hours.

5. For alarm information and system failures traced and handled by the mining organization, the mining organization must form a written tracing and handling report and report them to the Safety Supervision Bureau of the Molecular Company for the record.

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