CN101575984A - Coal mine underground monitoring and staff locating system - Google Patents
Coal mine underground monitoring and staff locating system Download PDFInfo
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- CN101575984A CN101575984A CNA2009103033307A CN200910303330A CN101575984A CN 101575984 A CN101575984 A CN 101575984A CN A2009103033307 A CNA2009103033307 A CN A2009103033307A CN 200910303330 A CN200910303330 A CN 200910303330A CN 101575984 A CN101575984 A CN 101575984A
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Abstract
A coal mine underground monitoring and staff locating system is a comprehensive operation system combining underground staff attendance, track location, after-disaster first aid, and daily management, and is the most advanced, stable and professional operation system; the system comprises a ground computer control centre, a transmission interface, a tag card, a foundational base station, a locating base station, a blast-proof and intrinsic safety type multi-way power box, and other matching equipment. The received staff condition signal is sent to the ground transmission interface through the locating base station by using a radio emission technique and sent to a host to process; the host executes judging and alarming, data counting and storage, display, man-machine conversation, staff line monitoring, and control and printing for the received monitoring signal. An alarm device is set in the special area of the coal mine such as a key area and a limited area so that the effective information is supplied to the after-disaster first aid and that the casualties in the coal mining accidents are also reduced.
Description
Technical field
The invention belongs to electronics and message area, relate to a kind of coal mine underground monitoring and personnel location system
Background technology
Although national departments concerned repeatedly issues relevant colliery management rules, coal mining accident still constantly occurs, and causes serious casualties, economic loss.Wherein most important reason is that the colliery is not equipped with corresponding establishments such as monitoring and personnel location system, and it is unclear to personnel in the pit's distribution situation to cause taking place particularly serious coal mining accident, can't in time rescue., ground staff big in the down-hole flowability according to the colliery operating personnel is difficult in time grasp personnel in the pit's distribution and operation progress and the back of going into the well just can't be known characteristics such as their residing position definitely, miner's routine attendance check generally manages by the mine lamp granting, but exist and much to think problem such as managerial confusion, when mine disaster takes place, be difficult to statistics down-hole effective strength and miner's particular location, bring numerous difficulties to rescue work.Native system has then changed the situation that present colliery down-hole accident takes place frequently and has improved rescue efficient, has guaranteed miner's life security.
Summary of the invention
The present invention is the comprehensive utilization system that integrates first aid after personnel in the pit's work attendance, track and localization, the calamity, daily management etc., satisfy the needs of Safety of Coal Mine Production, being applicable under the coal mine staff's location is followed the tracks of, also is domestic most advanced, stable, the most specialized utilization system.The objective of the invention is in order to overcome the deficiency of existing technology, a kind of coal mine underground monitoring and personnel location system are provided, have the card of taking personnel come in and go out well constantly, the key area comes in and goes out constantly, functions such as monitoring, demonstration, printing, storage, inquiry, warning, management such as restricted area is come in and gone out moment, working time, down-hole and key area personnel amount, personnel in the pit's activity route, can be accurately, in time, fast the personnel's situation under the mine is carried out real-time dynamic monitoring, effectively the miner is managed, and rescue efficiency after the quickening calamity.
The present invention is achieved in that
This coal mine underground monitoring and personnel location system comprise: ground-based computer control centre, coffret, tag card, locating base station, explosion-proof intrinsically safe multiple power supplies case and other connect equipment.Ground-based computer control centre in order to subsurface environment is monitored and to the down-hole moving target position, tracking, work attendance.The sectional drawing of down-hole can be the 3 D stereo rotation, and personnel describe by the mode of figure in position, track route and other related data of down-hole, and the manager is had at fingertips to the down-hole situation.
Described tag card is carried by the personnel of going into the well, and preserves the electronic data of agreement form, and when the identification range of in-position locating base station, the data that will be used for personal identification send to basic substation.
Described locating base station is to read the information that is used for personal identification in the tag card by wireless mode, and sends to ground transmission interface.Receive and carry out the order that the ground control centre sends simultaneously, when the ambient parameter in the mine did not meet operation or work standard, Surveillance center can send alarm signal by the base station, notified the personnel in the pit to withdraw.
Described coffret is sent to host process with the signal that receives, and receives host signal, sends to corresponding base station, controls the transmission and the reception of base station simultaneously, the modulation and demodulation of multiplex signal, and have function such as System self-test.
The invention has the beneficial effects as follows: to the setting of reporting to the police of special areas such as the key area in the colliery, restricted area, real-time dynamic monitoring by coal mine down-hole personnel, the personnel that enter these special areas are carried out warning reminding, reach the final purpose of eliminating accident potential, guarantee safe production and improve rescue efficiency after the calamity.In addition, when the personnel in the pit met accident or has an accident because of other situation, trapped personnel can carry out manual operation by tag card called for help, as: mine takes place permeable, and the personnel in the pit can call for help by permeable warning knob.Alarm signal is transferred to the ground control centre by corresponding locating base station, thereby obtains rescue fast, for life tries to gain time precious to one; In addition,, the miner is carried out effectively management of strictness,, can determine the name, identity, number, present position of trapped personnel etc. as early as possible, thereby find trapped personnel fast, improved rescue efficiency greatly in conjunction with real-time management information by described system.
Description of drawings
Fig. 1 is coal mine underground monitoring of the present invention and personnel location system work schematic diagram;
The specific embodiment
Describe the present invention in detail below in conjunction with accompanying drawing.
One, coal mine underground monitoring and personnel location system general introduction
Coal mine underground monitoring of the present invention and personnel location system are under the support of software database, by wireless radio-frequency the down-hole movable signal is carried out data acquisition, and send to the ground control centre by transmission equipment in real time, in the ground-based computer system, form figure display file, so that the ground handling personnel clearly understand the distribution situation of each operating personnel under the coal mine.The present invention is the comprehensive utilization system that integrates first aid after personnel in the pit's work attendance, track and localization, the calamity, daily management etc., is domestic most advanced, stable, the most specialized utilization system.Comprise following components: ground-based computer control centre, coffret, tag card, basic base station, locating base station, explosion-proof intrinsically safe multiple power supplies case and other connect equipment.The special areas such as restricted area that the present invention enters not permission personnel such as key areas such as the exploiting field in the colliery, coal-face, driving face, blind lane, the goafs setting of reporting to the police, be not only for first aid after the calamity provides effective information, more reduced personnel's Casualty Vulnerability Number in the coal mining accident.
Two, the purposes of this coal mine underground monitoring and personnel location system
1, personnel's monitoring and data acquisition: gather the personnel identity tag card of region in real time the base station, and a data that collect is sent to central station, by this mode to staff under the coal mine manage, real-time positioning, work attendance etc., and in computer, form the same trace graphics of people, realization is carried out computer management to the staff, information is accurate, timely, for Safety of Coal Mine Production provides powerful guarantee.
2, warning function: when the personnel of going into the well are overtime, overtime personnel and ground handling personnel are carried out bidirectional alarming; Carry out bidirectional alarming when coming in and going out special areas such as key area, restricted area as the operation personnel; When the subsurface environment parameter does not reach operation or work standard, carry out bidirectional alarming; When the down-hole take place permeable, when accident such as caving in, the operating personnel can report to the police by manual knob, so that aboveground personnel in time obtain trapped personnel information, and effectively rescues.
3, storage, statistics, inquiry and printing: the information that system docking is received has memory function, in real time these data are added up, administrative staff can inquire about miner's information by the various query categories that set, and but the calling of Chinese character form, initiation parameter prints, for miner's daily management and afterwards statistics effective foundation is provided.
4, realize the human-computer dialogue function: system adopts the menu mode man-machine conversation mode to finish various function operations, has realized aboveground and the timely and effective communication in down-hole, is not subjected to the restriction of other communication signal.
5, standby electric power function
The multiple power supplies case is self-powered, and when down-hole or ground central station machine room communication power supply hinder when disconnecting for some reason, reserve battery is devoted oneself to work, and can guarantee that relevant consumer in down-hole and ground central station continued operation more than 2 hours.
Three, the technology of this coal mine underground monitoring and personnel location system employing
The mode that this system adopts wireless transmit to combine with wire transmission, connect each other, handle the network of transmission information, combine embedded computer technology, distributed information processing and the communication technology, various environment in monitoring in real time, perception and the collection network distributed areas or monitoring target information, and these information are gathered, analyze, handle.This technology adopts the wireless telecommunications of 3GHz super high band, has increased network capacity, has reduced consumables cost, and its accuracy, reliability, stability are that other technology institute is incomparable.In addition, this system adopts the CORT algorithm, and in conjunction with distributed computing technology, network information example technology, realize network self-diagnosis, two-shipper switch, from fault-tolerant, self-healing.In addition,, on remote alarm interface, also made certain technical optimization, made that the speed and the accuracy of reporting to the police are very reliable, avoided optical fiber cost height, safeguarded inconvenience, be not easy to difficult problems such as popularization for avoiding the interference of downhole electrical motor and electric wave etc.
Four, the formation of this coal mine underground monitoring and personnel location system is referring to Fig. 1
1, information processing centre 1 tangible hardware facility comprises: monitoring host computer 2, display 3, printer 4, guest machine 5 etc.; Invisible condition comprises database, fire wall, WEB service software, application software etc.;
2, hop comprises Optical Fiber Transmission interface 6 and light/cable; The specific safety facility has lightning protection grid 7;
3, the information sent of the 8 pairs of tag cards that receive 9 in Card Reader base station is transmitted, link to each other with coffret 6 by mine cable, and information sent to monitoring host computer 2, predefined data and real-time residing state can together be presented in the display 3 in the tag card 9, aboveground staff can determine that whether the personnel in the pit is in a safe condition, and carries out next step operation according to data presented.The remote-wireless REID at this system half-angle tip combines with automatic control technology and network communications technology, can not in time obtain difficult problems such as rescue information after having solved miner's administrative mechanism imperfection, calamity, for safety in production provides powerful guarantee mechanism.
Five, the technical data of this coal mine underground monitoring and personnel location system and application conditions
1, technical data
1) reliable receiving range: 〉=30m between Card Reader base station and tag card;
2) distance between Card Reader base station and coffret :≤15km;
3) many each signals collecting;
4) Jian Rong radio-frequency receiving-transmitting;
5) maximum displacement speed 〉=5m/s;
6) concurrent knowledge card quantity 〉=100;
7) skip rate≤10
-4
8) Card Reader base station capacity: 128;
9) tag card capacity: 10000;
10) system's monitoring time: be not more than 15s;
11) transmission means: between Card Reader base station and tag card: wireless frequency modulation; Between Card Reader base station and coffret: principal and subordinate's half-duplex, QAM quadrature amplitude modulation;
12) transfer rate: 9600bps.
2, working environment:
1) this system is at the equipment in machine room, control room, operate as normal under following condition:
Environment temperature: 10 ℃～35 ℃;
Relative humidity: 40%～70%;
Rate of temperature change :≤10 ℃/h, and must not dewfall;
Atmospheric pressure: 80kPa～106kPa
2) but be installed on equipment operate as normal under following condition of down-hole:
Operating temperature: 0～40 ℃
Relative humidity :≤95% (+25 ℃)
Atmospheric pressure: 80kPa～106kPa
3) storing condition:
Aboveground part: 0 ℃+40 ℃, relative humidity 93% (+40 ℃)
Down-hole part :-40 ℃-+60 ℃, relative humidity 95% (+25 ℃), vibration 30m/s
2Impact 500m/s
2, non-corrosiveness gas, anacidity, alkali-free or other corrosivity, explosivity, flammable gas, well-ventilated.
The above specific embodiment describes the present invention; but it is just not limited thereto for ease of understanding; should not be considered to be limitation of the scope of the invention, various changes that are equal to or replacement that any those skilled in the art can make all should be in protection scope of the present invention.
Claims (5)
1. coal mine underground monitoring and personnel location system is characterized in that it comprises following components: ground-based computer control centre, coffret, tag card, locating base station, explosion-proof intrinsically safe multiple power supplies case and other connect equipment.Above various piece shows by computer by existing wireless and communication radio-frequency technique, thereby makes the ground handling personnel carry out real-time tracking to the underground work personnel.
2. coal mine underground monitoring according to claim 1 and personnel location system is characterized in that, the personal information that enters special area is added up and Realtime Alerts.
3. coal mine underground monitoring according to claim 1 and personnel location system is characterized in that, the multiple power supplies case possesses two hours functions of outage back power backup, makes system's endure after outage, and safe escape in guaranteeing between the employee at this moment.
4. coal mine underground monitoring according to claim 1 and personnel location system, it is characterized in that, tag card can concurrent identification the card number more than at least 100, and be higher than 5m/s in maximum displacement speed and accomplish that 100% does not lose card, guaranteed the accuracy of location and personal information.
5. coal mine underground monitoring according to claim 1 and personnel location system is characterized in that for the whole image of personnel's route surveillance map, the response time is not more than 2S, provide effective foundation to personnel's real-time tracking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009103033307A CN101575984A (en) | 2009-06-17 | 2009-06-17 | Coal mine underground monitoring and staff locating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009103033307A CN101575984A (en) | 2009-06-17 | 2009-06-17 | Coal mine underground monitoring and staff locating system |
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| Publication Number | Publication Date |
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| CN101575984A true CN101575984A (en) | 2009-11-11 |
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| CNA2009103033307A Pending CN101575984A (en) | 2009-06-17 | 2009-06-17 | Coal mine underground monitoring and staff locating system |
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Cited By (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101848419A (en) * | 2010-05-06 | 2010-09-29 | 西安邮电学院 | Positioning and tracking system of underground/roadway moving object |
| CN102373949A (en) * | 2011-10-20 | 2012-03-14 | 杜志刚 | Coalface well lane full-automatic safety equipment with personnel positioning system |
| CN102383852A (en) * | 2011-10-20 | 2012-03-21 | 杜志刚 | Full-automatic safety equipment of stoping-face well roadway with personnel positioning |
| CN102383850A (en) * | 2011-10-20 | 2012-03-21 | 杜志刚 | Full-automatic safety facility with operator positioning function for well mine of stope face |
| CN102383853A (en) * | 2011-10-20 | 2012-03-21 | 杜志刚 | Full-automatic safety equipment of driving-face well roadway with personnel positioning |
| CN102383848A (en) * | 2011-10-20 | 2012-03-21 | 杜志刚 | Full-automatic safety equipment of driving-face well roadway with personnel positioning |
| CN102383854A (en) * | 2011-10-20 | 2012-03-21 | 杜志刚 | Full-automatic safety equipment with personnel positioning system for heading stope roadway |
| CN102383840A (en) * | 2011-10-20 | 2012-03-21 | 杜志刚 | Full-automatic safety equipment of stoping-face well roadway with personnel positioning |
| CN102383849A (en) * | 2011-10-20 | 2012-03-21 | 杜志刚 | Full-automatic safety equipment mounted with personnel positioning device for well lane of stope |
| CN102383846A (en) * | 2011-10-20 | 2012-03-21 | 杜志刚 | Full-automatic safety equipment with personnel positioning system for driving face roadway |
| CN102383842A (en) * | 2011-10-20 | 2012-03-21 | 杜志刚 | Full-automatic safety equipment with personnel positioning function for tunneling working surface roadway |
| CN102383841A (en) * | 2011-10-20 | 2012-03-21 | 杜志刚 | Full-automatic safety equipment of stoping-face well roadway with personnel positioning |
| CN102705009A (en) * | 2012-05-22 | 2012-10-03 | 上海乾视通信技术有限公司 | Mine information system |
| CN102802173A (en) * | 2012-08-06 | 2012-11-28 | 中国矿业大学(北京) | System for underground communication and staff monitoring based on TD-LTE technology |
| CN102979564A (en) * | 2011-09-14 | 2013-03-20 | 杜志刚 | Stope face roadway full-automatic safety equipment |
| CN103016061A (en) * | 2012-11-19 | 2013-04-03 | 中国矿业大学(北京) | Underground locating and monitoring communication system |
| CN103573291A (en) * | 2013-11-06 | 2014-02-12 | 徐州江煤科技有限公司 | Mine worker management system |
| CN104486581A (en) * | 2014-12-04 | 2015-04-01 | 广州中国科学院先进技术研究所 | Multi-bionic-eye monitoring region image real-time dynamic display method and system |
| CN104832213A (en) * | 2015-05-06 | 2015-08-12 | 中国矿业大学(北京) | Coal theft-mining monitoring method based on personnel positioning system |
| CN105338481A (en) * | 2014-06-30 | 2016-02-17 | 奇点新源国际技术开发(北京)有限公司 | Data processing method and device for mines |
| CN106934435A (en) * | 2017-04-12 | 2017-07-07 | 合肥才来科技有限公司 | A kind of underground coal mine Asset Tracking System |
| CN107170205A (en) * | 2017-06-29 | 2017-09-15 | 浙江图讯科技股份有限公司 | A kind of checking maintenance method for early warning and its early warning system |
| CN107448235A (en) * | 2017-05-18 | 2017-12-08 | 华信润邦（北京）智能科技有限公司 | One kind is based on pinpoint mine safety management method |
| CN107871114A (en) * | 2016-09-23 | 2018-04-03 | 杭州海康威视数字技术股份有限公司 | A kind of method, apparatus and system for pushing target person tracking information |
| CN108577004A (en) * | 2018-04-16 | 2018-09-28 | 辽宁工程技术大学 | A kind of mine fire escape safety cap and its application method |
| CN111305903A (en) * | 2020-04-07 | 2020-06-19 | 攀钢集团矿业有限公司 | Underground mine early warning information contact signal device |
| CN111722565A (en) * | 2020-06-22 | 2020-09-29 | 山东盛隆安全技术有限公司 | Automatic control technology for accurate personnel positioning base station |
| CN114183200A (en) * | 2021-11-29 | 2022-03-15 | 中煤科工集团沈阳研究院有限公司 | Inspection device and method for inspection period of coal mine personnel positioning system |
| CN114255570A (en) * | 2022-01-27 | 2022-03-29 | 新拓尼克科技(成都)有限公司 | Software and hardware system for interval positioning alarm |
| CN116582930A (en) * | 2023-07-13 | 2023-08-11 | 湖南泓森智能科技有限公司 | Underground personnel accurate positioning software system based on regional positioning |
| CN118481712A (en) * | 2024-07-15 | 2024-08-13 | 江苏钜熙矿用设备科技有限公司 | Control system for automatic explosion-proof device under roadway well |
-
2009
- 2009-06-17 CN CNA2009103033307A patent/CN101575984A/en active Pending
Cited By (38)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101848419A (en) * | 2010-05-06 | 2010-09-29 | 西安邮电学院 | Positioning and tracking system of underground/roadway moving object |
| CN102979564A (en) * | 2011-09-14 | 2013-03-20 | 杜志刚 | Stope face roadway full-automatic safety equipment |
| CN102383842A (en) * | 2011-10-20 | 2012-03-21 | 杜志刚 | Full-automatic safety equipment with personnel positioning function for tunneling working surface roadway |
| CN102383841A (en) * | 2011-10-20 | 2012-03-21 | 杜志刚 | Full-automatic safety equipment of stoping-face well roadway with personnel positioning |
| CN102383853A (en) * | 2011-10-20 | 2012-03-21 | 杜志刚 | Full-automatic safety equipment of driving-face well roadway with personnel positioning |
| CN102383848A (en) * | 2011-10-20 | 2012-03-21 | 杜志刚 | Full-automatic safety equipment of driving-face well roadway with personnel positioning |
| CN102383854A (en) * | 2011-10-20 | 2012-03-21 | 杜志刚 | Full-automatic safety equipment with personnel positioning system for heading stope roadway |
| CN102383840A (en) * | 2011-10-20 | 2012-03-21 | 杜志刚 | Full-automatic safety equipment of stoping-face well roadway with personnel positioning |
| CN102383849A (en) * | 2011-10-20 | 2012-03-21 | 杜志刚 | Full-automatic safety equipment mounted with personnel positioning device for well lane of stope |
| CN102383846A (en) * | 2011-10-20 | 2012-03-21 | 杜志刚 | Full-automatic safety equipment with personnel positioning system for driving face roadway |
| CN102373949A (en) * | 2011-10-20 | 2012-03-14 | 杜志刚 | Coalface well lane full-automatic safety equipment with personnel positioning system |
| CN102383850A (en) * | 2011-10-20 | 2012-03-21 | 杜志刚 | Full-automatic safety facility with operator positioning function for well mine of stope face |
| CN102383852A (en) * | 2011-10-20 | 2012-03-21 | 杜志刚 | Full-automatic safety equipment of stoping-face well roadway with personnel positioning |
| CN102705009A (en) * | 2012-05-22 | 2012-10-03 | 上海乾视通信技术有限公司 | Mine information system |
| CN102802173A (en) * | 2012-08-06 | 2012-11-28 | 中国矿业大学(北京) | System for underground communication and staff monitoring based on TD-LTE technology |
| CN102802173B (en) * | 2012-08-06 | 2014-11-19 | 中国矿业大学(北京) | System for underground communication and staff monitoring based on TD-LTE technology |
| CN103016061A (en) * | 2012-11-19 | 2013-04-03 | 中国矿业大学(北京) | Underground locating and monitoring communication system |
| CN103016061B (en) * | 2012-11-19 | 2015-05-27 | 中国矿业大学(北京) | Underground locating and monitoring communication system |
| CN103573291A (en) * | 2013-11-06 | 2014-02-12 | 徐州江煤科技有限公司 | Mine worker management system |
| CN105338481A (en) * | 2014-06-30 | 2016-02-17 | 奇点新源国际技术开发(北京)有限公司 | Data processing method and device for mines |
| CN104486581A (en) * | 2014-12-04 | 2015-04-01 | 广州中国科学院先进技术研究所 | Multi-bionic-eye monitoring region image real-time dynamic display method and system |
| CN104486581B (en) * | 2014-12-04 | 2018-02-06 | 广州中国科学院先进技术研究所 | A kind of more bionic eye monitor area picture Real time dynamic display method and system |
| CN104832213B (en) * | 2015-05-06 | 2017-08-25 | 中国矿业大学(北京) | Coal illegal mining monitoring method based on personnel location system |
| CN104832213A (en) * | 2015-05-06 | 2015-08-12 | 中国矿业大学(北京) | Coal theft-mining monitoring method based on personnel positioning system |
| CN107871114A (en) * | 2016-09-23 | 2018-04-03 | 杭州海康威视数字技术股份有限公司 | A kind of method, apparatus and system for pushing target person tracking information |
| CN107871114B (en) * | 2016-09-23 | 2022-04-26 | 杭州海康威视数字技术股份有限公司 | Method, device and system for pushing tracking information of target person |
| CN106934435A (en) * | 2017-04-12 | 2017-07-07 | 合肥才来科技有限公司 | A kind of underground coal mine Asset Tracking System |
| CN107448235A (en) * | 2017-05-18 | 2017-12-08 | 华信润邦（北京）智能科技有限公司 | One kind is based on pinpoint mine safety management method |
| CN107170205A (en) * | 2017-06-29 | 2017-09-15 | 浙江图讯科技股份有限公司 | A kind of checking maintenance method for early warning and its early warning system |
| CN108577004A (en) * | 2018-04-16 | 2018-09-28 | 辽宁工程技术大学 | A kind of mine fire escape safety cap and its application method |
| CN111305903A (en) * | 2020-04-07 | 2020-06-19 | 攀钢集团矿业有限公司 | Underground mine early warning information contact signal device |
| CN111722565A (en) * | 2020-06-22 | 2020-09-29 | 山东盛隆安全技术有限公司 | Automatic control technology for accurate personnel positioning base station |
| CN114183200A (en) * | 2021-11-29 | 2022-03-15 | 中煤科工集团沈阳研究院有限公司 | Inspection device and method for inspection period of coal mine personnel positioning system |
| CN114183200B (en) * | 2021-11-29 | 2024-03-01 | 中煤科工集团沈阳研究院有限公司 | Inspection device and method for inspection period of coal mine personnel positioning system |
| CN114255570A (en) * | 2022-01-27 | 2022-03-29 | 新拓尼克科技(成都)有限公司 | Software and hardware system for interval positioning alarm |
| CN116582930A (en) * | 2023-07-13 | 2023-08-11 | 湖南泓森智能科技有限公司 | Underground personnel accurate positioning software system based on regional positioning |
| CN118481712A (en) * | 2024-07-15 | 2024-08-13 | 江苏钜熙矿用设备科技有限公司 | Control system for automatic explosion-proof device under roadway well |
| CN118481712B (en) * | 2024-07-15 | 2024-09-20 | 江苏钜熙矿用设备科技有限公司 | Control system for automatic explosion-proof device under roadway well |
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