All relevant units:

In order to promote the application of the coal mine underground personnel positioning system and further standardize the management of safety signs of related products, after investigation and research, extensive solicitation of opinions and expert demonstrations, the " Coal Mine Underground Personnel Positioning System Safety Sign Management Plan (Trial) " and " Coal Mine Underground Personnel Safety Sign Management Plan" have been formulated. Positioning System Safety Technical Requirements (Trial) " and " Inspection Plan for Safety Signs of Coal Mine Underground Personnel Positioning System (Trial) " are hereby promulgated for trial implementation from the date of promulgation.

Please report to the National Center for Safety Standards in a timely manner if you have any questions about the trial implementation.

Contact person and phone number:

Meng Jijian, 010-84263744, 15611629809

Tao Mengmeng, 010-84263744, 15251906306

Email: jsjy@aqbz.org

appendix:

1. Safety sign management plan for underground personnel positioning system in coal mines (trial)

2. Safety technical requirements for underground personnel positioning system in coal mines (trial implementation)

3. Inspection scheme for safety signs of underground personnel positioning system in coal mines (trial)

Anbiao National Mining Product Safety Marking Center Co., Ltd.

                                         August 9, 2021 

In order to implement the state's work deployment on promoting the intelligent construction of coal mines, speed up the trial and promotion of personnel positioning systems in coal mines, and give full play to its important role in coal mine safety production, before the official release and implementation of relevant national and industry standards, coal mines should This scheme is implemented during the review and issuance of safety signs of the underground personnel positioning system (hereinafter referred to as the system):

1. The management of safety signs of the system shall be carried out in accordance with the Implementation Rules for the Review and Release of Mining Products Safety Signs for New Products (ABGZ-MK-06-2017-01), and the first and second applications shall be conducted in accordance with the new product review and distribution mode II, and the procedures shall be performed. After passing the test, a new product safety mark certificate valid for 3 years will be issued.

2. In the process of reviewing and issuing safety signs, the system shall not only implement the " Implementation Rules for the Review and Distribution of Safety Signs for Mining Products (Mine Safety, Production Monitoring and Monitoring System) " (ABGZ-MA-FCA-2017-01), but also meet this requirement. The scheme and the requirements of " Safety Technical Requirements for Coal Mine Personnel Positioning System " (trial) and " Safety Sign Inspection Scheme for Coal Mine Personnel Positioning System " (trial).

3. When applying for a safety mark, an enterprise should provide product technical instructions, product instruction manuals, drawings, and a list of main zero (element) components, as well as product self-assessment reports, self-inspection reports and system anti-interference performance thorough tests. The report should focus on the test environment, methods and specific data of system integration, positioning error, inspection cycle, working time of backup power supply, anti-interference and other functions and technical indicators.

4. For the system that has passed the inspection, its name specification is " coal mine underground personnel positioning system ", and the model implements the provisions of MT/T 286, for example: KJ100 coal mine underground personnel positioning system; the maximum static positioning error is not greater than 0.3m , and the maximum dynamic positioning error is not greater than 0.3m. The positioning error is not more than 7.3m , and organized by the safety standard, the system that uses the "Safety Sign Inspection Scheme for the Positioning System of Coal Mine Underground Personnel" to conduct on-site inspection and verification in the coal mine can be called " Precision Positioning System for Underground Personnel in Coal Mine ", and features are added after the model. Code "J", for example: KJ100J Coal Mine Underground Personnel Precise Positioning System.

5. For the coal mine underground personnel positioning system, the verification of its positioning function (including static and dynamic) adopts laboratory inspection, and the maximum positioning error should be specified in the technical documents and inspection reports. Enterprises can also choose to increase the on-site inspection of coal mines. After the inspection, the wireless transmission distance and maximum positioning error of the on-site inspection of coal mines should be specified in the system technical documents and inspection reports. The inspection report should indicate the place and location of the on-site inspection of coal mines. , Roadway category (slot, main road, etc.), working conditions (length of test interval, section size, nearby high-power electrical equipment, etc.).

6.  For the precise positioning system for underground personnel in coal mines, the verification of its positioning function (including static and dynamic) must be carried out in addition to laboratory inspections, and on-site inspections must be carried out . The wireless transmission distance and maximum positioning error of the underground on-site inspection, the inspection report shall indicate the site, location, roadway type (slot, main road, etc.), working conditions (length of the test interval, section size, nearby power electrical equipment, etc.).

7. The qualified technical documents should at least specify the equipment layout and test methods during the wireless transmission distance and maximum positioning error (including static and dynamic) tests.

8. Before conducting the field test in the coal mine, the stand-alone equipment in the system should obtain the safety sign certificate.

9. After the release and implementation of the standard "General Technical Conditions for Underground Personnel Positioning System in Coal Mine", the National Safety Standard Center will evaluate and change the version of this plan, and the projects with differences should undergo supplementary testing.

According to the provisions of relevant standards such as " Coal Mine Safety Regulations ", AQ6210-2007 " General Technical Conditions for Coal Mine Underground Personnel Management System ", and combined with the technical development status of the coal mine underground personnel positioning system (hereinafter referred to as the system), it was officially released in relevant countries and industry standards. Before the implementation, in order to ensure the smooth progress of the system's safety sign review and issuance, this safety technical requirement was formulated after extensive research, solicitation of opinions, thorough investigation and comparison test.

1. Basic requirements

In addition to meeting the relevant requirements of the "Coal Mine Safety Regulations (2016)", AQ6210-2007 and other standards, the system should also meet the safety technical requirements.

2. Main functions

1. The system should be able to integrate with vehicle management systems such as safety monitoring, emergency broadcasting systems, rubber-wheeled vehicles and electric locomotives; it should be integrated with GIS technology; it should be integrated with power supply monitoring, coal production monitoring, mobile communication, video surveillance (control), lighting control, Emergency guidance and other systems are integrated.

2. The system should have the function of detecting whether the positioning card is working normally and the uniqueness detection function of each person carrying one card. should be identified and alerted. Facial recognition, iris recognition and other technologies should be used.

3. The system should have the functions of setting, identifying, recording, inquiring and statistic about the information of the leaders going down the well.

4. The system should have the function of monitoring the position and time of the person carrying the card; it should have the function of two-dimensional positioning of the person carrying the card.

5. A portable locator shall be included in the system composition, and the system shall have the function of off-net positioning using the portable locator.

6. The system should have the start/stop time of the card-carrying personnel crossing the boundary, the start/stop time near the old empty area, the start/stop time near the coal and gas outburst danger area, the start/stop time near the rockburst danger area, the stay time, the personnel Monitoring, alarming, displaying, printing, storing and querying functions such as total number and personnel.

3. Technical indicators

1. The maximum static positioning error of the coal mine underground personnel positioning system should not be greater than 3m, and the maximum dynamic positioning error should not be greater than 10m ; When necessary, a downhole test is required.

2. The maximum displacement speed should not be less than 7m/s .

3. The wireless transmission distance between the positioning card and the positioning sub-station/locator should not be less than 400m in the open and unobstructed condition; the wireless transmission distance under the coal mine is specified by the product enterprise standard. When necessary, a downhole test is required.

4. The maximum inspection period is not more than 2s.

5. Switching time between two machines : The time from the failure of the working host to the normal working of the standby host should not exceed 1min.

6. After the power grid is cut off, the backup power supply should be able to ensure that the continuous monitoring time of the system is not less than 4h.

7. The remote intrinsically safe power supply distance should not be less than 2km, and increase by integer when it is greater than 2km.

8. The portable locator using rechargeable batteries should be able to ensure that the continuous working time of the portable locator is not less than 8h each time it is charged.

9. The system backbone network should use industrial Ethernet.

10. The data storage time of the substation should not be less than 4h.

11. Anti-interference performance. The system should meet the following anti-interference performance:

(1) The equipment installed on the ground should be able to pass the electrostatic discharge immunity test with a severe level of 3 specified in GB/T 17626.2-2018, and the evaluation level is A.

(2) The system should be able to pass the radio frequency electromagnetic field radiation immunity test with a severe level of 2 specified in GB/T 17626.3-2016, and the evaluation level is A.

(3) The system should be able to pass the electrical fast transient burst immunity test with the severity level 2 specified in GB/T 17626.4-2018, and the evaluation level is A.

(4) The AC power port of the system should be able to pass the surge (impact) immunity test with a severe level of 3 specified in GB/T 17626.5-2019, and the evaluation level is B. The DC power port and signal port of the system should be able to pass the surge (impact) immunity test with a severe level of 2 specified in GB/T 17626.5-2019, and the evaluation level is B.

12. The identification card (including the positioning terminal integrated with the miner's lamp) used in the personnel positioning system, the portable locator, the identification card search instrument, etc. shall meet the requirements of EPL Ma.

In order to ensure the smooth progress of the review and issuance of safety signs for the coal mine underground personnel positioning system (hereinafter referred to as the system), according to the relevant standards, the "Coal Mine Safety Regulations", the "Coal Mine Underground Personnel Positioning System Safety Sign Management Plan (Trial)" and the "Coal Mine Underground Personnel" This inspection plan is formulated in accordance with relevant regulations such as Positioning System Safety Technical Requirements (Trial Implementation).

1 Scope of application

This scheme is applicable to the products of the underground personnel positioning system in coal mines.

This scheme is applicable to the inspection of main functions and technical indicators in "Safety Technical Requirements for Personnel Positioning System in Coal Mine".

2 Inspection preparation requirements

System manufacturers should prepare relevant documents and samples before inspection.

2.1 Documentation requirements

Before the inspection is carried out, the company submitting the inspection shall provide the inspection agency with the following written materials:

(1) Complete technical information, including enterprise standards (or technical conditions), instruction manuals, detailed list of main zero (element) components and important raw materials, drawings, factory inspection reports of related products, and physical photos of products, etc.;

(2) The product self-assessment report and self-inspection report should focus on the test environment, methods and specific data of functions and technical indicators such as system integration, positioning error, inspection cycle, and standby power operating time;

(3) The thorough test report of the system anti-jamming performance should include the details and data of the anti-jamming test.

2.2 Sample requirements

In addition to meeting the requirements of Article 5.4 of AQ6210-2007, the following requirements should also be met:

(1) The system equipment and the number of equipment should meet the test requirements of the functions and technical indicators specified in the "Safety Technical Requirements for Coal Mine Underground Personnel Positioning System (Trial)" (hereinafter referred to as "Safety Technical Requirements");

(2) If the positioning sub-station (referred to as the sub-station) has other functions, a complete sample of the functional unit shall be provided;

(3) Necessary equipment for safety monitoring, emergency broadcasting and other systems that can realize emergency linkage function shall be provided.

3 Technical conditions

In addition to meeting the relevant requirements of the "Coal Mine Safety Regulations (2016)" and AQ6210-2007, and meeting the relevant regulations for the safety isolation of wells and undergrounds, the system should also meet the "Safety Technical Requirements".

4 Test methods

4.1 Main test equipment

4.1.1 Laboratory test equipment

Use the following or equivalent equipment:

a) AC power supply (the supply voltage should meet the test requirements);

b) AC voltage regulator;

c) DC stabilized power supply;

d) Distance meter (the range should meet the test requirements, the maximum allowable error is ±(5.0+5×10-5×test distance) mm);

e) electronic stopwatch;

f) oscilloscope;

g) spectrum analyzer;

f) Optical attenuator;

g) Cable simulation line (RLC parameters should meet cable specifications);

h) equipment that can accurately record the time;

i) photographing/camera equipment;

j) Immunity test equipment (meet the immunity test requirements);

k) Other necessary test equipment.

4.1.2 Downhole testing equipment:

Use the following or equivalent equipment:

a) Distance meter (the range should meet the test requirements, the maximum allowable error is ±(5.0+5×10-5×test distance) mm);

b) equipment that can accurately record the time;

c) Equipment for real-time communication between uphole and downhole inspection personnel and underground explosion-proof photographing/camera equipment;

d) Other necessary test equipment.

4.2 Main function test

4.2.1 System fusion test

4.2.1.1 The system should be based on GIS technology and have the function of spatial geographic information service, not limited to two-dimensional and three-dimensional.

4.2.1.2 Multi-system fusion check

(1) If the multi-system integration adopts the ground method, if the personnel positioning system is used as the main body, the production unit will provide the basis and demonstrate it; if other systems are used as the main body, it is only judged that the system has a transmission interface for fusion and supports the ground multi-network integration;

(2) Using downhole fusion

a) The integrated system as a whole should meet the respective standard requirements of the integrated system, and the test should be carried out under the condition that all parts of the whole system are running at the same time, including intrinsic safety characteristics;

b) During the anti-jamming test, if the connected system does not affect the anti-jamming capability of the personnel positioning system, the anti-jamming capability of the access system may not be considered, such as the use of optical fiber access. If there is any influence, the system as a whole should be subjected to anti-interference test as required. After the fusion, the normal operation of the personnel positioning system cannot be affected.

c) The backup power supply capacity of the substation must consider the maximum load of the power circuit.

(3) Precautions

a) If the underground method is used to integrate with the safety monitoring system, the system shall be managed according to the product of "Coal Mine Safety Monitoring System".

b) When the underground method is used to integrate with emergency broadcasting, rubber-wheeled vehicles and electric locomotives and other vehicle management systems, power supply monitoring, coal production monitoring, mobile communication, video monitoring (control), lighting control, emergency guidance and other systems, personnel positioning is related to Before the performance indicators and functions are tested, the data transmission status corresponding to other system functions should be manually configured to the maximum data load.

c) For the inspection of the linkage function of the system, the verification shall be carried out item by item according to the linkage mechanism specified in the technical data of the system manufacturer and in combination with the industry standard requirements corresponding to each subsystem.

4.2.2 Uniqueness Detection

If a person does not carry a positioning card or carries a non-personal positioning card, or one person carries multiple (including 2) positioning cards, the system should be able to issue an alarm signal.

4.2.3 Information about the team leader going down the well

Select a positioning card and set it as a substitute leader in the system, set relevant information, and simulate its going down.

4.2.4 Monitoring of the location and time of card-carrying personnel

The maximum concurrent number of positioning cards enter and exit the substation positioning area from left and right directions respectively. The system and substations should be able to correctly determine the position and time of the positioning cards. Each 1/2 of the maximum concurrent number of positioning cards can enter and exit the substation positioning area from left and right at the same time, and the system and substations should be able to correctly determine the location and time of the positioning cards.

4.2.5 Portable locator offline positioning

The system and substation stop working, and the portable locator should be able to correctly determine the position and time of the locating card.

4.2.6 Set up corresponding areas in the system. The system will check the start/stop time of the card-carrying personnel crossing the boundary, the start/stop time of the adjacent old empty area, the start/end time of the coal and gas outburst danger area, and the adjacent ground pressure danger area. There should be monitoring functions such as start/stop times, as well as display, printing, storage and query functions. When personnel cross the boundary, near the old empty area, near the coal and gas outburst danger area, and near the rock burst danger area, the system should Call the police.

4.3 Main technical index test

4.3.1 Positioning Error Test

See Appendix A for the test method.

4.3.2 Maximum displacement velocity test

The maximum concurrent number of positioning cards passes through the substation positioning area at the same time, and the maximum displacement speed that meets the positioning error and leakage/misreading rate is measured.

4.3.3 Wireless Transmission Distance Test

The positioning card approaches the sub-station from outside the positioning area, and stops when the sub-station correctly determines the position of the positioning card. The distance between the positioning card and the sub-station is measured, which is the wireless transmission distance between the positioning card and the sub-station.

When testing the wireless transmission distance in the coal mine, the main road and the trough should be selected to arrange the positioning area, and the test should be carried out according to the above method.

4.3.4 Maximum inspection cycle test

In the 3 independent positioning areas that make up the test system, pass 1/3 of the maximum concurrent positioning cards at the same time, and start timing until the host displays all relevant information (which can be the collected positioning card data) to stop timing, and the measured time is Inspection cycle.

4.3.5 Dual-machine switching test

The switching mode should be automatic switching of dual-machine hot standby, and test the time from meeting the switching conditions to the normal operation of the standby machine.

4.3.6 Backup power working time test

The backup power supply (or power supply) with the backup battery in a fully charged state, connect the simulated rated load (or the actual maximum combined load), cut off the AC power supply, start working and timing; until the backup power supply (or power supply) stops working, stop timing. Backup battery operating time is 80% of the above time.

4.3.7 Remote intrinsically safe power supply distance test

The remote intrinsically safe power supply is connected to the maximum combined load through the dummy line, and the system should be able to work normally.

4.3.8 Portable locator battery working time test

The locator with the rechargeable battery in a fully charged state is in normal working state and starts timing; when the rechargeable battery is lower than the minimum discharge voltage or the locator cannot be guaranteed to work normally, stop timing. The battery working time of the portable locator is 80% of the above time.

4.3.9 Backbone Networking Mode

Check the system connection block diagram and actual connection, the system backbone network must use industrial Ethernet.

4.3.10 Substation storage data time test

Under the normal operation of the system, disconnect the transmission cable or optical cable between the substation and the transmission host, pass the positioning card of the substation with half of the maximum concurrent number every half an hour, a total of 8 times, and then restore the transmission cable between the substation and the host. The sub-station should be able to accurately upload the position and time of the positioning card that has passed through the sub-station positioning area 8 times to the central station.

4.3.11 Anti-interference performance

According to the relevant provisions of GB/T 17626.2-2018, GB/T 17626.3-2016, GB/T 17626.4-2018, GB/T 17626.5-2019 and combined with the system configuration, the test results should meet the requirements of Article 11 of "Safety Technical Requirements" related requirements.

1. Positioning error

According to the different technical solutions of the current system, the system positioning error is divided into one-dimensional positioning error and two-dimensional positioning error.

The absolute value of the difference between the distance of the positioning card measured by the system and the actual distance between the substation antenna and the positioning card is set as the one-dimensional positioning error; the distance from the position of the positioning card measured by the system to the actual position of the positioning card is set as the two-dimensional positioning error.

The positioning error is divided into static error and dynamic error. The static error is the difference between the position of the positioning card measured by the system and the actual position of the positioning card when the positioning card is in a static state; the dynamic positioning error is the difference between the position of the positioning card measured by the system and the actual position of the positioning card when the positioning card is in a moving state .

The system positioning error test examines the maximum positioning error of the system. For systems with two-dimensional positioning and one-dimensional positioning functions at the same time, the maximum positioning error should be checked separately.

The positioning error inspection is divided into laboratory (including ground open environment) inspection and coal mine underground field inspection.

2. Inspection preparation

1. Sample requirements

a) Host, positioning sub-stations (hereinafter referred to as sub-stations), positioning cards, network switches, power boxes and other necessary components;

b) The number of sub-stations shall not be less than the minimum number that can constitute a positioning area to realize the system positioning function;

c) The total number of positioning cards is not less than the number of concurrent identifications M. If the system contains multiple positioning cards or information miner's lamps, if the principle is the same, the total number of multiple positioning cards and information miner's lamps is the maximum concurrent identification number M. The number of cards and information miner's lamps should be at least 10 each; if they have different principles, they should be tested separately;

d) During the on-site inspection of the coal mine, the installation and connection method of the tested system shall be consistent with the technical documents of the product and meet the requirements of the underground test.

2. Inspection site

The laboratory test should choose an open place without obstruction and strong electromagnetic interference, which can meet the connection needs of this test, and the straight line length of the site is not less than the maximum wireless transmission distance between the positioning card and the substation described in the product technical document.

Coal mine underground site inspection site should at least select the trough and the main road.

3. Laboratory positioning error test

1. Preparation before the test

Before starting the inspection, the data refresh frequency of the positioning card should be checked, which should be consistent with the product technical documents; the maximum wireless transmission distance between the positioning card and the sub-station should be checked, which should be consistent with the product technical documents.

2. Maximum static positioning error test

(1) Substation layout

Deploy the substation according to the substation layout method and the maximum wireless transmission distance between the positioning card and the substation described in the product technical document (it is recommended that the substation antenna test installation height is the same as the positioning card, or 1.5m ~ 2m according to the actual use layout height ), the vertical height of the positioning card is 1±0.2m;

The system must not be adjusted during the test.

(2) Determine the test point

In the sub-station positioning area, at least 10 test points are selected by means of non-absolute uniform distribution, and the following conditions are met:

a) Positioning measuring points should be set at 5-10 meters near each sub-station;

b) The positioning measuring point should be set at the maximum wireless transmission distance between the positioning card and the substation given by the system;

c) Positioning measuring points should be set within 5 meters near the midpoint of the unilateral positioning area of ​​the substation;

d) In addition to the above positions, randomly select other measuring point positions;

e) There is no limit to the number of positioning cards placed at each measuring point, but the total number of positioning cards placed at all measuring points should be M. Once the number of positioning cards allocated to each measuring point is determined, it cannot be adjusted during the test.

Note: Not absolutely uniform means that it is not concentrated in a small area and is not evenly distributed.

(3) Test method

Place the positioning cards at the measuring points respectively. After the system is powered on and works stably, clear the positioning data stored in the system and start the test. Read the positioning data of no less than 104 cards in total, that is, read the positioning data of no less than 104/M positioning cycle time, and calculate the difference between the measured position and the actual position of all the positioning cards, and the maximum difference is the largest static error.

3. Maximum dynamic positioning error test

(1) Substation layout

Use the same substation layout as the laboratory maximum static positioning error test.

(2) Determine the test point

Set test points near the sub-station, at the two borders of the sub-station positioning area, and in the middle of the sub-station and the two boundaries of the positioning area.

(3) Test method

The maximum concurrent number of positioning cards, at the maximum displacement speed, pass the test point at the same time, test three times, and calculate the difference between the measured position and the actual position of all positioning cards, and the maximum difference is the maximum dynamic error.

4. On-site positioning error inspection in coal mines

1. Test security

(1) The test work should be carried out under the premise of ensuring the personal safety of the testers;

(2) The coal mine tested shall be a low gas mine;

(3) Safety measures should be formulated for on-site testing, and coal mine staff including tile inspectors should accompany the whole process of underground testing;

(4) Time synchronization of technical equipment and positioning system should be carried out before the on-site test.

2. Pre-test preparation

Choose one location in each of the trough and the main alley as the test site. Before starting the inspection, the data refresh frequency of the positioning card should be checked, which should be consistent with the description in the product technical documents; the maximum wireless transmission between the positioning card and the sub-station should be checked. The distance should be consistent with that described in the product technical documentation.

The large equipment in the roadway where the test is located should be in normal operation, and other systems connected to the ring network should be in normal operation.

During the test, the system software of the coal mine and the underground test should be operated by the personnel of the inspection agency at the same time.

3. Maximum static positioning error test

(1) Substation layout

According to the substation layout method described in the product technical document and the maximum underground wireless transmission distance between the positioning card and the substation, the substation is laid out. The substation antenna test layout height is subject to the actual use, and the positioning card is placed at a vertical height of 1±0.2m. ;

The system must not be adjusted during the test.

(2) Determine the test point

In the sub-station positioning area, at least 10 test points are selected by means of non-absolute uniform distribution, and the following conditions are met:

a) Positioning measuring points should be set at 5-10 meters near each sub-station;

b) The positioning measuring point should be set at the maximum wireless transmission distance between the positioning card and the substation given by the system;

c) Positioning measuring points should be set within 5 meters near the midpoint of the unilateral positioning area of ​​the substation;

d) In addition to the above positions, randomly select other measuring point positions;

e) There is no limit to the number of positioning cards placed at each measuring point, but the total number of positioning cards placed at all measuring points should be M. Once the number of positioning cards allocated to each measuring point is determined, it cannot be adjusted during the test.

Note: Not absolutely uniform means that it is not concentrated in a small area and is not evenly distributed.

(3) Test method

Place the positioning cards at the measuring points respectively. After the system is powered on and works stably, clear the positioning data stored in the system and start the test. Read the positioning data of no less than 104 cards in total, that is, read the positioning data of no less than 104/M positioning cycle time, and calculate the difference between the measured position and the actual position of all the positioning cards, and the maximum difference is the largest static error.

4. Maximum dynamic positioning error test

(1) Substation layout

The same substation layout method is adopted as the test of the maximum static positioning error in the well.

(2) Determine the test point

Set test points near the sub-station, at the two borders of the sub-station positioning area, and in the middle of the sub-station and the two boundaries of the positioning area.

(3) Test method

Select 20 positioning cards to be carried by the testers, pass the test points at the same time at normal walking speed, test three times, and calculate the difference between the measured position and the actual position of all positioning cards, and the maximum difference is the maximum dynamic error.