CN116927884A - Safety closed loop control system for roof of underground coal mine tunnel and operation method thereof - Google Patents
Safety closed loop control system for roof of underground coal mine tunnel and operation method thereof Download PDFInfo
- Publication number
- CN116927884A CN116927884A CN202310993982.8A CN202310993982A CN116927884A CN 116927884 A CN116927884 A CN 116927884A CN 202310993982 A CN202310993982 A CN 202310993982A CN 116927884 A CN116927884 A CN 116927884A
- Authority
- CN
- China
- Prior art keywords
- early warning
- anchor
- monitoring
- roof
- roadway
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003245 coal Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims description 18
- 238000012544 monitoring process Methods 0.000 claims abstract description 155
- 239000011435 rock Substances 0.000 claims abstract description 79
- 238000000926 separation method Methods 0.000 claims abstract description 52
- 238000005065 mining Methods 0.000 claims abstract description 18
- 238000005516 engineering process Methods 0.000 claims abstract description 11
- 238000004891 communication Methods 0.000 claims abstract description 9
- 238000004458 analytical method Methods 0.000 claims abstract description 8
- 238000007726 management method Methods 0.000 claims description 27
- 238000004873 anchoring Methods 0.000 claims description 24
- 230000033001 locomotion Effects 0.000 claims description 24
- 238000012806 monitoring device Methods 0.000 claims description 24
- 230000008859 change Effects 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 230000004044 response Effects 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 9
- 230000033228 biological regulation Effects 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 7
- 239000004677 Nylon Substances 0.000 claims description 5
- 230000008030 elimination Effects 0.000 claims description 5
- 238000003379 elimination reaction Methods 0.000 claims description 5
- 229920001778 nylon Polymers 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 241000282326 Felis catus Species 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 230000008520 organization Effects 0.000 claims description 4
- 238000009825 accumulation Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 230000005641 tunneling Effects 0.000 claims description 3
- 206010063385 Intellectualisation Diseases 0.000 abstract description 3
- 239000002243 precursor Substances 0.000 abstract description 3
- 230000000007 visual effect Effects 0.000 abstract description 3
- 238000012800 visualization Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 10
- 238000006073 displacement reaction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000032798 delamination Effects 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 3
- 244000161999 Acacia greggii Species 0.000 description 2
- 235000004608 catclaw acacia Nutrition 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/025—Grouting with organic components, e.g. resin
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/02—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection having means for indicating tension
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The application discloses a safety closed loop control system for a roof of an underground coal mine tunnel, which comprises mine pressure monitoring unit equipment, a mine pressure monitoring substation and a mine pressure data acquisition substation, wherein the mine pressure monitoring substation is arranged in the underground tunnel and is in communication connection with the mine pressure monitoring unit equipment; the system also comprises a PC end installed on the well, wherein the PC end comprises comprehensive monitoring analysis software and an early warning short message pushing platform. The application realizes visualization, automation and intellectualization of roadway mining pressure monitoring, controls the stress changes of the rock strata separation layer and surrounding rock of the roadway roof in real time, discovers the precursor of roof instability and potential roadway roof safety hazards in real time through continuous visual data and analysis data information technology, precisely pushes the safety risk hidden danger information of roadway mining pressure monitoring to related personnel in a short message manner in the first time in real time, carries out safety early warning forecast and advanced treatment on various roof risk hidden hazards, changes the current situation that the conventional manual regular observation cannot monitor the roof safety condition in real time, and effectively avoids roof accidents.
Description
Technical Field
The application relates to the technical field of coal mine roadway roof safety, in particular to a safety closed loop control system for an underground coal mine roadway roof and an operation method thereof.
Background
In the coal mine production process, the control of the top plate is particularly important, and the personal safety of coal mine operators is related. Along with the increase of high-strength mining and depth of underground coal mines, the control difficulty of surrounding rock of a roadway is gradually increased, the roadway support is difficult, the damage and repair rate are increased, and the high-efficiency and safe stoping of deep coal layers is threatened. In the coal mine accidents, the accident frequency of the roof is high, and most of the accidents are caused by the fact that when the tunnel roof and surrounding rock are severely changed, the on-site abrupt change potential safety hazards cannot be found in time, the safety early warning and forecasting cannot be carried out in time, the potential hazards cannot be treated by adopting effective measures rapidly, a good opportunity for eliminating the potential hazards is missed, and roof disaster accidents are frequent.
The earliest monitoring of underground roof of coal mine adopts mechanical and numerical mine pressure monitoring instrument, and adopts manual observation method to judge the danger. The method has the advantages of large error, low time efficiency, large workload, large blindness, low efficiency and the like due to the influence of factors such as site construction quality, coal seam structural characteristics and the like.
At present, a plurality of coal mines adopt digital display storable equipment (infrared acquisition type) for updating original mechanical products, data are stored in a chip, and after a few days, the data are extracted to a ground computer through a collector for data integration analysis. The observation mode has the defects of delayed and untimely data, bright zhuge after the fact, poor timeliness of the observation technology, long observation time density interval, incapability of monitoring the separation value of a roadway roof, the stress value of a supporting anchor rod (rope), the change of roadway surrounding rock and potential safety hazards in real time, poor safety timeliness, low safety control efficiency and poor safety effect. When the tunnel roof and surrounding rock are changed drastically, potential hidden danger and mutation on site cannot be found and fed back in time, and safety early warning and forecasting are carried out; effective measures cannot be rapidly taken to treat hidden dangers, and a good opportunity for eliminating hidden dangers is missed, so that roof disasters are frequent.
Therefore, a safe and reliable roadway mine pressure (roof separation) monitoring system is established, real-time monitoring is realized, when risk hidden danger occurs on site, the real-time discovery can be realized, the safety early warning and prediction can be performed immediately, the problem feedback, the system analysis, the emergency response and the effective measures are adopted, the emergency treatment are carried out, and a roof risk hidden danger safety closed loop control system, a multi-department safety emergency response management system and an emergency treatment linkage mechanism for eliminating hidden danger are necessary conditions for realizing safe and efficient production of mines.
Disclosure of Invention
The technical problems to be solved by the application are as follows: how to solve the problems that the existing mine roadway mine pressure monitoring has low safety, cannot perform real-time early warning and forecasting and rapidly adopts effective measures to treat potential safety hazards of the top plate.
In order to solve the technical problems, the application provides the following technical scheme:
the mine pressure monitoring substation is in communication connection with the mine pressure monitoring unit equipment, and the mine pressure monitoring substation is connected into the underground mine pressure data acquisition substation through a communication optical cable;
the system comprises a well, a mining pressure monitoring and early warning system and a mining pressure monitoring and early warning system, wherein the well is provided with a PC end installed on the well, the PC end comprises comprehensive monitoring and analysis software and an early warning short message pushing platform, the comprehensive monitoring and analysis software sends short message early warning information to a user through the early warning short message pushing platform, and if the early warning information is true, the user judges whether the early warning information is true, carries out mining pressure monitoring and early warning classification, and carries out scheduling and classification treatment according to different early warning layers;
and the ore pressure data acquisition substation is in communication connection with the PC end through an ore industry Ethernet.
The application realizes the visualization, automation and intellectualization of the roadway mine pressure monitoring by establishing the coal mine roadway mine pressure on-line monitoring management control system, controls the rock stratum separation layer and surrounding rock stress change of the roadway roof in real time, discovers the precursor of roof instability and potential roadway roof safety hidden danger by continuous visual data and analysis data information technology, innovates and establishes a coal mine roadway mine pressure on-line monitoring risk hidden danger safety closed loop control system, a multi-department safety emergency response management system and an emergency disposal linkage mechanism, and timely and accurately pushes the safety risk hidden danger information of roadway mine pressure monitoring to related management staff in a short message mode, thereby changing the current situation that the conventional manual regular observation cannot monitor the roof safety condition in real time; the labor intensity of monitoring workers is reduced, the equipment of monitoring personnel is reduced, and the 'personnel reduction and synergy' is realized.
As a further scheme of the application: the PC end also comprises a mine comprehensive informatization module and a comprehensive monitoring analysis module.
As a further scheme of the application: the mine pressure monitoring unit equipment comprises a plurality of groups of surrounding rock moving monitoring devices, anchor rod stress monitoring devices and anchor cable stress monitoring devices which are arranged on the surrounding rock wall.
As a further scheme of the application: the surrounding rock mobile monitoring device comprises a deep monitoring base point anchor and a shallow monitoring base point anchor positioned below the deep monitoring base point anchor, wherein the deep monitoring base point anchor and the shallow monitoring base point anchor are both installed in a top plate installation hole formed in a surrounding rock wall, the tops of the deep monitoring base point anchor and the shallow monitoring base point anchor are both fixed in the top plate installation hole through cat paws, and the bottoms of the deep monitoring base point anchor and the shallow monitoring base point anchor are both connected to tubular screws through steel wires;
the top of tubular screw installs and seals the tray, seals the top of tray and installs the sensor sleeve, and wherein the top of sensor sleeve stretches into in the roof mounting hole, install the country rock motion sensor on the sensor sleeve, the country rock motion sensor is connected with the sensor again.
As a further scheme of the application: the anchor rod stress monitoring device comprises an anchor rod body, wherein the anchor rod body is fixed into an anchor rod hole formed in the surrounding rock wall through a first resin anchoring agent, the other end of the anchor rod body is connected with an anchor rod tray, and one side of the anchor rod tray is sequentially connected with a nylon antifriction washer, a steel washer and a nut;
and the anchor rod tray is also provided with a first pressure strain force transducer which is electrically connected to the first stress transducer.
As a further scheme of the application: the anchor rope stress monitoring device comprises an anchor rope rod body, wherein the anchor rope rod body is fixed into an anchor rope hole formed in a surrounding rock wall through a second resin anchoring agent, the other end of the anchor rope rod body is connected with an anchor rope tray, one side of the anchor rope tray is provided with a lock used for fixing the anchor rope rod body, one side of the lock is provided with a locking piece, and the other side of the lock facing the anchor rope tray is provided with a core adjusting ball pad;
and the anchor cable tray is also provided with a second pressure strain force transducer which is electrically connected to the second pressure strain force transducer.
The application also discloses an operation method of the safety closed loop control system of the roof of the underground coal mine roadway, which comprises the following steps:
s1, designing and installing a comprehensive monitoring station and a daily monitoring station in an underground roadway;
s2, mounting of a comprehensive monitoring station: firstly, three groups of comprehensive monitoring stations are arranged within the range of 100m in front of a tunneling construction roadway, and a group of comprehensive monitoring stations is arranged every 200m later, and can be arranged in an encryption mode according to the condition of a field roof;
s3, installing a group of surrounding rock movement (or roof separation) monitoring devices in each group of comprehensive monitoring stations;
s4, installing four anchor rod or anchor cable monitoring devices in each group of comprehensive monitoring stations to monitor the working load stress of the anchor rods or anchor cables;
s5, mounting a daily monitoring station: a group of roof separation layer observation stations are arranged every 50m, encryption arrangement is carried out according to the scene condition, the number of measuring points in the hole is 2, and if the comprehensive monitoring stations are arranged at 50m positions, the daily monitoring stations are not arranged any more;
s6, when the comprehensive monitoring station or the daily monitoring station monitors the movement of the surrounding rock of the top plate of the roadway (the separation layer of the top plate), the stress value change of the anchor rod or the anchor cable reaches an early warning value, information is sent to an industrial PC end on the well through the industrial Ethernet;
s7, starting a multi-department safety emergency response management system and an emergency treatment linkage mechanism, and synchronously pushing early warning information to inform related level management personnel;
s8, receiving early warning information, analyzing and primarily judging whether the early warning is real or not by the production technology through system software, immediately informing a manager above a field team leader by a basic unit, checking the condition of the top plate of the station roadway and the nearby supporting condition on site, and synchronously verifying;
s9, after the real early warning is verified on site, reporting the dispatching bureau, correspondingly notifying technical departments and related leaders according to different early warning levels by the dispatching bureau, checking and rechecking sites by related personnel, making hidden danger elimination treatment measures, and immediately reinforcing and treating responsibility units according to the regulations of operation regulations (emergency plans), wherein the issuing of business contact books by the technical departments for production is completed in a limited period.
As a further scheme of the application: in the step S9, the security risk of the surrounding rock movement (roof separation) is divided into three hierarchical values, wherein:
the low risk is three-level, the early warning value (namely, the maximum elongation when the anchor cable reaches the breaking force value) is 50mm, and the early warning value is set according to 5 percent of the elongation of the 4.0m free section of the anchor cable (the breaking value is 25 percent);
the medium risk is the second level, the early warning value (namely the maximum elongation when the anchor cable reaches the breaking force value) is 120mm, and the early warning value is set according to 5 percent of the elongation of the 4.0m free section of the anchor cable (60 percent of the breaking value);
the high risk is the first level, the early warning value (namely the maximum elongation when the anchor cable reaches the breaking force value) is 180mm, and the early warning value is set according to 5 percent of the elongation of the 4.0m free section of the anchor cable (the breaking value is 90 percent); and when the separation value of the roof of the single-day roadway is more than or equal to 30mm and the accumulation of the separation value of continuous 7 days is more than or equal to 50mm, carrying out primary early warning treatment on the same risk.
As a further scheme of the application: in the step S9, the safety risk of the stress load of the anchor bolt support is divided into three hierarchy values, wherein:
the low risk is three-level, the early warning value is 122kN (152 x 80% = 122 kN), and the early warning value is set according to the fact that the yield force of the anchor rod is greater than or equal to 80% of 152 kN;
the medium risk is the second level, the early warning value is 137kN (152 x 90% = 137 kN), and the early warning value is set according to the fact that the yield force of the anchor rod is more than or equal to 90% of 152 kN;
the high risk is the first level, and the early warning value is 152kN (152 x 100% = 152 kN), and is set according to the fact that the anchor rod yield force is more than or equal to 100% of 152kN.
As a further scheme of the application: in the step S9, the security risk of the anchor rope supporting stress load is divided into three hierarchy values, wherein:
the low risk is three-level, the early warning value is 410kN (513 x 80% = 410 kN), and the early warning value is set according to the yield force of the anchor cable being more than or equal to 80% of the yield force of 513 kN;
the medium risk is a secondary, and the early warning value 461kN (513 x 90% = 461 kN) is set according to the yield force 90% of the anchor cable yield force which is more than or equal to 513 kN;
the high risk is first-level, and the early warning value is 513kN (513 x 100% = 513 kN), and is set according to the yield force of the anchor cable being more than or equal to 100% of the yield force of 513 kN.
Compared with the prior art, the application has the beneficial effects that:
1. the application realizes the visualization, automation and intellectualization of the roadway mine pressure monitoring by establishing the coal mine roadway mine pressure on-line monitoring management control system, controls the rock stratum separation layer and surrounding rock stress change of the roadway roof in real time, discovers the precursor of roof instability and potential roadway roof safety hidden danger by continuous visual data and analysis data information technology, innovates and establishes a coal mine roadway mine pressure on-line monitoring risk hidden danger safety closed loop control system, a multi-department safety emergency response management system and an emergency disposal linkage mechanism, and timely and accurately pushes the safety risk hidden danger information of roadway mine pressure monitoring to related management staff in a short message mode, thereby changing the current situation that the conventional manual regular observation cannot monitor the roof safety condition in real time; the labor intensity of a monitor is reduced, the equipment of the monitor is reduced, and the 'personnel reduction and synergy' is realized;
2. according to the application, on-line monitoring, monitoring of the position and speed change of the roof separation of a roadway and a significant deformation area in two sides are realized through a surrounding rock movement (roof separation) sensor and an anchor rod (rope) stress sensor, the stability of the roof is judged according to monitoring data, and the roof potential safety hazard is effectively treated in time through a safety closed loop control system, a multi-department safety emergency response system and an emergency treatment linkage mechanism, so that roof accidents are avoided; the on-line monitoring of the change rule of the anchoring force of the roadway roof and the two anchor rods (ropes) along the length of the anchor rods (ropes) can be realized through the anchor rod stress sensor, the working state of the anchor rods (ropes) is evaluated, the quality of the working face support is improved, and the safe working environment is improved; the monitoring data is updated in real time and automatically stored to form a report for data query, and the data is comprehensively analyzed and safely evaluated through safety analysis software to provide scientific decisions for roadway support safety;
3. according to the application, through the established multi-department safety emergency response management system and emergency treatment linkage mechanism, real-time monitoring is realized, immediate discovery, quick starting, hierarchical management and hierarchical treatment are realized when roof risk hidden danger occurs on site, closed loop control of emergency treatment of the safety risk hidden danger is realized, various roof risk hidden dangers are effectively treated in advance, roof accidents are effectively avoided, mine safety coefficient is improved, and underground roadway roof safety management is realized; the method has the advantages that the real-time pushing of the roadway safety risk hidden danger early warning information, the real-time pushing of the secondary early warning information checking, the real-time pushing of the disposal information, hidden danger disposal results and the like are realized, the early warning information studying, judging and disposal conditions can be mastered in time by a grading manager and a branch pipe leader, the whole process supervision is realized, the whole process can trace the source, and the safe closed loop control is realized;
4. the application designs an early-warning treatment process, scientifically sets an ore pressure early-warning value, sets a hierarchical early-warning mode and a hierarchical control mode from low to high, realizes hierarchical management and hierarchical treatment, and realizes safe closed loop control;
5. according to the application, information is correspondingly pushed to the classification manager and the branch pipe leader according to three levels of early warning 'low, medium and high', so that the classification manager and the branch pipe leader can conveniently master early warning information, study, judge and treat conditions in time, effectively treat various roof hidden dangers in advance, realize safe closed loop control, improve mine safety coefficient and realize underground roadway roof safety management.
Drawings
FIG. 1 is a schematic diagram of a monitoring device for monitoring movement of surrounding rock (roof separation) according to an embodiment of the present application;
FIG. 2 is a schematic structural view of an anchor monitoring device according to an embodiment of the present application;
fig. 3 is a schematic structural view of an anchor cable monitoring device according to an embodiment of the present application;
FIG. 4 is a flow chart of the on-line monitoring and data processing of the mine pressure according to the embodiment of the application;
FIG. 5 is a flow chart of an early warning and hidden danger eliminating emergency treatment according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a measurement point setting of a surrounding rock movement sensor according to an embodiment of the present application;
FIG. 7 is a schematic diagram of a displacement range of a measuring point of a surrounding rock movement sensor according to an embodiment of the present application;
FIG. 8 is a schematic diagram of analysis of stress correlation between a surrounding rock movement (roof separation) measuring point and an anchor rod (cable) according to an embodiment of the application;
reference numerals illustrate: 1. a top plate mounting hole; 2. deep monitoring of the base point anchor; 3. cat paws; 4. a steel wire; 5. shallow monitoring of the foundation point anchor; 6. surrounding rock wall; 7. a sensor sleeve; 8. a sealing tray; 9. a tubular screw; 10. a surrounding rock movement sensor; 11. a delamination sensor; 12. a bolt body; 13. an anchor rod hole; 14. a first resin anchoring agent; 15. a first hole wall; 16. an anchor rod tray; 17. nylon antifriction washers; 18. a steel washer; 19. a nut; 20. a first pressure strain force transducer; 21. a stress sensor I; 22. an anchor cable rod body; 23. anchor cable holes; 24. a second resin anchoring agent; 25. a hole wall II; 26. a stress sensor II; 27. an anchor cable tray; 28. core adjusting ball pads; 29. a lock; 30. locking the clamping piece; 31. and a second pressure strain force transducer.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly and completely described in the following in conjunction with the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 4 and 5, a safety closed loop control system for a roof of an underground coal mine roadway comprises mine pressure monitoring unit equipment, a mine pressure monitoring substation and a mine pressure data acquisition substation, wherein the mine pressure monitoring unit equipment comprises a surrounding rock movement (roof separation layer) sensor and an anchor rod (cable) stress sensor, the mine pressure monitoring substation is connected with the mine pressure monitoring unit equipment through a communication optical cable and a wireless network, and the mine pressure monitoring substation is connected into the underground mine pressure data acquisition substation through the communication optical cable.
Referring to fig. 4 and 5, the system further comprises a PC end installed on the well, the PC end comprises comprehensive monitoring analysis software, an early warning short message pushing platform and a mine comprehensive informationized platform, the comprehensive monitoring analysis software monitors data processing, data storage, early warning and the like, the monitored signals are sent to a user through the early warning short message pushing platform, the user refers to a hierarchical management department or a manager, meanwhile, the comprehensive monitoring analysis software provides interface display for the user to check through a configuration database, and after the user receives short message early warning information, whether the early warning information is real or not is judged according to software analysis data. If true, classifying the mine pressure monitoring and early warning, and carrying out scheduling instructions and classification treatment according to different early warning levels.
It should be noted that the underground and the aboveground are connected through an industrial Ethernet (tera-megafiber), and the mine pressure data acquisition substation is connected with the mine industrial Ethernet (tera-megafiber) to upload data to the PC end of the underground, so that the real-time monitoring of mine pressure is realized.
Referring to fig. 4 and 5, the mine pressure on-line monitoring risk hidden danger safety closed loop system for the coal mine tunnel is characterized in that mine pressure monitoring sensors, namely, surrounding rock moving (roof separation) sensors and anchor rod (cable) stress sensors, are installed in the underground tunnel in a segmented mode to realize real-time on-line monitoring of conditions of underground tunnel roof separation, surrounding rock deformation, anchor rod (cable) supporting stress and the like, and the segmented mine pressure monitoring data of the underground tunnel are transmitted to an underground mine pressure monitoring server, namely, an industrial PC end in a real-time on-line mode. And (3) performing risk early warning by a system with the safety risk of the field roadway roof exceeding a set early warning value (note that the early warning value is set according to the roof support safety management condition), namely synchronizing underground field acousto-optic automatic early warning and ground controller early warning.
Referring to fig. 1, a surrounding rock movement (roof separation) sensor can realize on-line monitoring of a roadway roof separation position, speed change and a significant deformation area in two sides, judge the stability of a roof according to monitoring data, and effectively treat hidden danger and time of the roadway roof through an ore pressure safety closed-loop management and control system, a safety emergency response management system and an emergency treatment linkage mechanism, so that roof accidents are avoided.
Further, the surrounding rock mobile monitoring device comprises a deep monitoring base point anchor 2 and a shallow monitoring base point anchor 5 positioned below the deep monitoring base point anchor 2, wherein the deep monitoring base point anchor 2 and the shallow monitoring base point anchor 5 are installed in a top plate installation hole 1 formed in a surrounding rock wall 6, the tops of the deep monitoring base point anchor 2 and the shallow monitoring base point anchor 5 are fixed in the top plate installation hole 1 through cat paws 3, and the bottoms of the deep monitoring base point anchor 2 and the shallow monitoring base point anchor 5 are connected to tubular screws 9 through steel wires 4; the top of the tubular screw 9 is provided with a sealing tray 8, and the top of the sealing tray 8 is provided with a sensor sleeve 7, wherein the top of the sensor sleeve 7 extends into the top plate mounting hole 1.
The method for installing the surrounding rock movement (roof separation) monitoring device comprises the following steps:
s31, a roof mounting hole is formed in the surrounding rock wall 6, the diameter of the mounting hole is 28-32mm, a deep monitoring base point anchor 2 is arranged in the roof mounting hole, a drill rod is used for pushing the deep base point anchor 2 to the designed depth, a steel wire 4 is pulled by hand after the drill rod is pulled out, and the drill rod is fixed through a cat claw anchor 3;
s32, loading the shallow monitoring base point anchor 5, pushing the shallow monitoring base point anchor 5 to a design position by using a drill rod, pulling the steel wire 4 by hand after extracting the drill rod, and fixing by using the cat claw anchor 3;
s33, after the deep-shallow base point is installed, inserting the sensor sleeve 7 into the hole, screwing the tubular screw 9 to drive the sealing tray 8 to seal the hole, lightly pulling to confirm that the steel wire 4 is tightly clamped, tightening the screw to clamp the steel wire rope, and cutting off the exposed redundant steel wire;
and S34, if the surrounding rock is deformed and the roof separation layer is performed, the steel wire is pulled, the surrounding rock movement sensor 10 receives the roof separation layer change value, and the value is transmitted to the separation layer sensor 11 to realize roof separation layer monitoring and numerical display, wherein the separation layer sensor is actually a displacement sensor.
It should be noted that the method for setting the deep and shallow measuring points of the surrounding rock movement sensor comprises the following steps: the shallow foundation point is selected to be larger than or equal to the supporting depth of the anchor rod; and the deep base point should be selectively placed above the depth of the cable support (as shown in figure 6).
Referring to fig. 2 and 3, the anchor rod (rope) stress sensor can realize on-line monitoring of the change rule of the anchoring force of the tunnel roof and the two anchor rods (ropes) along the length of the anchor rods (ropes), evaluate the working state of the anchor rods (ropes), improve the quality of tunnel support and improve the safe operation environment. The monitoring data is updated in real time and automatically stored to form a report for data query. And comprehensively analyzing and safely evaluating the data through safety analysis software, and providing scientific decisions for roadway support safety.
Further, referring to fig. 2, the anchor stress monitoring device comprises an anchor rod body 12, wherein the anchor rod body 12 is fixed into an anchor rod hole 13 formed on a surrounding rock wall 6 through a first resin anchoring agent 14, the other end of the anchor rod body 12 is connected with an anchor rod tray 16, and one side of the anchor rod tray 16 is sequentially connected with a nylon antifriction washer 17, a steel washer 18 and a nut 19; the anchor tray 16 also has mounted thereon a first pressure strain gauge 20, the first pressure strain gauge 20 being electrically connected to a first strain gauge 21.
Further, referring to fig. 3, the cable stress monitoring device includes a cable body 22, wherein the cable body 22 is fixed in a cable hole 23 formed on the surrounding rock wall 6 through a second resin anchoring agent 24, the other end of the cable body 22 is connected with a cable tray 27, one side of the cable tray 27 is provided with a lock 29 for fixing the cable body 22, one side of the lock 29 is provided with a locking piece 30, and the other side of the lock 29 facing the cable tray 27 is provided with a core adjusting ball pad 28; the anchor cable tray 27 is further provided with a second pressure strain force transducer 30, and the second pressure strain force transducer 30 is electrically connected to the second pressure transducer 26.
The installation method of the anchor rod (rope) stress monitoring device is as follows (refer to fig. 2 and 3):
s41, forming anchor rod (rope) holes in the surrounding rock wall 6, filling resin anchoring agents into the anchor rod (rope) holes, and driving anchor rod (rope) bodies to stir the resin anchoring agents through rotation of stirring equipment;
s42, after the resin anchoring agent lengthens and anchors the end part of the anchor rod body, the anchor rod body (or the upper part drilling machine) rotates to drive the nut to push the steel gasket 18, the nylon antifriction gasket 17, the first pressure strain force sensor 20 and the anchor rod tray 16 to be fixed and twisted, so that the initial high pretightening force pretightening is realized;
s43, after the end part of the anchor cable rod body is lengthened and anchored by the resin anchoring agent, the end part of the anchor cable rod body is tensioned and locked by an anchor cable tensioner (or hydraulic jack) cylinder, and the jack telescopic cylinder pushes a locking piece 30, a lock 29, a pressure strain force transducer II 26, an aligning spherical gasket 28 and an anchor cable tray 27 to implement initial high pretightening force tensioning;
s44, after the anchor bolt support system is installed, high prestress is generated on the surrounding rock wall, and a high prestress bearing structure is formed;
s45, the first pressure strain force transducer and the second pressure strain force transducer synchronously transmit the pressure value equivalent to the corresponding force transducer to realize the stress monitoring and the numerical display of the anchor rod (cable).
Referring to fig. 7, the setting position of the deep foundation point of the surrounding rock sensor 10 is to monitor the rock stratum stability at the top end of the anchor cable and the surrounding rock stability of the anchoring area of the supporting section of the anchor cable, the installation position is 0.1-0.3m at the top end of the anchor cable, and mainly monitor whether the rock stratum stability at the top end of the anchor cable and the rock stratum of the supporting anchoring section are affected by mining or are affected by the stress development and damage of the surrounding rock; the setting position of the shallow foundation point of the surrounding rock sensor 10 is used for monitoring the stability of rock strata at the top end of the anchor rod and a supporting anchoring section, and the installation position is 0.1-0.3m at the top end of the anchor rod. When surrounding rock of a roadway is influenced by mining or by stress development, damage influence and the like of the surrounding rock, a roadway top plate is unstable, separated layer, broken and the like, if the potential hazard is not timely disposed, the roadway can deform, damage and even the top plate falls off, so that safety accidents are caused;
when the roof changes or separation occurs, the surrounding rock of the roadway roof can move up and down, the steel wire 4 in the sensor device stretches, and the sensor immediately collects the separation amount of the surrounding rock of the roof. If the deep base point and the shallow base point have the change of the separation layer value, and the change value of the deep base point is basically equal to the change value of the shallow base point, the anchor bolt supporting and anchoring section and (the end head of the anchor bolt) are damaged in the upward rock stratum, the top plate has the separation layer, and the surrounding rock above the anchor rope supporting section and the top end of the anchor rope is relatively stable; if the deep base point separation layer value is changed and the shallow base point is unchanged, the fact that the surrounding rock above the anchor bolt supporting and anchoring section and the anchor bolt end is free of separation layer is indicated, separation layer occurs in the range above the anchor rope supporting and anchoring section, and the roadway surrounding rock breaks the rock stratum above and at the top of the anchor rope supporting and anchoring section.
Referring to fig. 8, shallow base delamination may cause the load of the anchor rod and the anchor rope support to increase, and the length of the anchor rod and the anchor rope rod body to increase, and when the roof delamination value exceeds the limit extension value of the anchor rod and the anchor rope rod body, the anchor rod and the anchor rope rod body may be broken, the roadway support may fail, and the roadway may even roof. The load of the anchor cable is increased and the rod body of the anchor cable is increased due to the deep foundation point separation layer, when the separation layer value of the top plate exceeds the limit extension value of the rod body of the anchor cable, the anchor cable is broken, and the roadway support is invalid, damaged and even roof-fall.
The specific operation principle of the safety closed loop control system of the roof of the underground coal mine roadway is as follows (refer to fig. 4 and 5):
s1, designing and installing a comprehensive monitoring station and a daily monitoring station in an underground roadway;
s2, mounting of a comprehensive monitoring station: the main content of comprehensive monitoring station monitoring is to monitor the surface displacement of the roadway, the deep displacement of surrounding rock (roof separation) and the working load of an anchor rod (cable), so as to verify or correct the initial design of the anchor rod support, evaluate and adjust the support design;
setting a standard: three groups of comprehensive monitoring stations are arranged in the range of 100m in front of the tunneling construction roadway, one group is arranged every 200m later, and the comprehensive monitoring stations can be arranged in an encrypted mode according to the condition of a field roof.
1. A group of surrounding rock deep displacement (roof separation layer) devices are arranged in each group of comprehensive monitoring stations, the observation range of the deep displacement of the roof surrounding rock is not less than 1.5 times of the roadway span, and the number of monitoring points in holes is not less than 4; the specific positions are as follows: the depth of the uppermost separation layer depth monitoring base point is not smaller than 1.5 times of the measured roadway width, the position of the separation layer measuring point of the lowermost shallow monitoring base point is 100mm below the upper end head of the roof bolt (as shown in fig. 6 and 7), and the positions of other two groups of comprehensive monitoring stations are respectively located at 4.3m and 6.3 m;
2. the stress monitoring of the working load of the anchor rod (rope) is carried out by arranging stress sensors of the anchor rod (rope) at all sides in each group of comprehensive monitoring stations, namely, one position of each roof anchor rod and each anchor rope and one position of each anchor rod (not shown in the figure);
s2, mounting a daily monitoring station: the main content of monitoring is to monitor the displacement of the deep part of surrounding rock (roof separation), in order to find out abnormal situation in time;
setting a standard: a group of roof separation observation stations are arranged every 50m, and encryption arrangement is carried out according to the situation of the site; the number of the in-hole measurement points is 2, and the specific positions are as follows: the depth of the uppermost separation layer depth monitoring base point is not smaller than 1.5 times of the actually measured roadway width, and the position of the separation layer measuring point of the lowermost shallow monitoring base point is 100mm below the upper end head of the roof bolt; if the 50m position is provided with the comprehensive monitoring station, no daily monitoring station is arranged;
s3, designing an early warning and hidden danger eliminating emergency treatment process, so as to realize hierarchical control and hierarchical treatment and realize safe closed loop control;
when the roadway mining pressure on-line monitoring system (namely a comprehensive monitoring station or a daily monitoring station) monitors the movement of the roadway roof surrounding rock (roof separation) and the stress value change of an anchor rod (cable) to reach an early warning value, information is sent to an industrial PC end on a well through an mining industry Ethernet;
s4, starting an ore pressure on-line monitoring risk hidden danger safety closed loop system, a multi-department safety emergency response management system and an emergency disposal linkage mechanism, and synchronously pushing early warning information to inform related level management staff;
s8, receiving early warning information, and the production technology and the science preliminarily judge whether the early warning is real or not through system software analysis data (historical curve change inquiry), and immediately informing a manager above a field team leader of the field to verify the condition of the top plate of the station roadway and the nearby supporting condition on site and synchronously verify the condition;
s9, after the real early warning is verified on site, reporting the dispatching bureau, correspondingly notifying technical departments and related leaders according to different early warning levels by the dispatching bureau, checking the site by related personnel, checking corresponding rule measure rules, supplementing and perfecting hidden danger elimination treatment measures, and immediately reinforcing and treating responsibility units according to the operation rule (emergency plan) rules, wherein the issuing business contact book of the technical departments for production is completed in a limited period.
Further, the early warning information in step S8 is checked and verified:
the technical mine pressure group checks historical change curve data of the early warning station sensor and the battery electric quantity, and preliminarily judges whether the early warning station sensor is real early warning; the construction unit synchronously checks the condition of the roof of the roadway of the site early warning station and the nearby supporting condition; the mine pressure group simultaneously informs personnel in a construction unit on duty room by telephone, and forwards early warning information to the mine pressure on-line monitoring system management group, and the basic responsibility unit receives the information and must reply and confirm (double confirmation is carried out, so that the early warning information arrives and is fed back at the first time).
Further, in step S9, the ore pressure stress early-warning value level is scientifically set:
1. surrounding rock movement (roof separation) security risk level design is three levels from low to high.
1-1. Security risk for surrounding rock movement (roof separation) is divided into three hierarchical values:
low risk: third, the early warning value is 50mm; risk of (1): second, the early warning value is 120mm; high risk: first-stage, early warning value is 180mm.
The design basis is as follows: the yield force value of the anchor cable is 88% -95% of the breaking force value (GB/T5224-2014), and the maximum elongation requirement (maximum force total elongation) of the SKP22-1/1860 mining anchor cable is more than or equal to 5.0% when the breaking force is reached, and the anchor cable rod body is in an elastic deformation state before reaching the yield force value.
And (3) designing the risk level of the surrounding rock moving (roof separation) value, namely taking the design length of a mine tunnel roof supporting anchor cable foundation as a standard, wherein the length of the anchor cable is 6.2m (three-roll anchoring agent anchoring), the exposed length of the anchor cable design is 200mm, the length of an anchor cable anchoring section is 2000mm, and the length of a free section in the middle of the anchor cable is 4000mm. The maximum elongation of the cable at break force value is 4000mm x 5.0% = 200mm.
Low risk: third, the early warning value (namely, the maximum elongation of the anchor cable when reaching the breaking force value) is 50mm (4000×5% ×25% =50 mm), and the early warning value is set according to 5 percent of the elongation of the 4.0m free section of the anchor cable (25 percent of the breaking value);
risk of (1): secondly, the early warning value (namely the maximum elongation when the anchor cable reaches the breaking force value) is 120mm (4000×5% ×60% =120 mm), and the early warning value is set according to 5% (60% of breaking value) of the 4.0m free section elongation of the anchor cable;
high risk: first-order, early warning value (i.e. maximum elongation of anchor cable when reaching breaking force value) 180mm (4000×5% ×90% =180 mm): setting according to 5 percent of the elongation (90 percent of breaking value) of the 4.0m free section of the anchor cable; and when the separation value of the roof of the single-day roadway is more than or equal to 30mm and the accumulation of the separation value of continuous 7 days is more than or equal to 50mm, carrying out primary early warning treatment on the same risk.
1-2, designing stress load safety risk levels of anchor rods (MSGLW-400/phi 22 anchor rods are selected as anchor rods) and anchor cables (SKP 22-1/1860 mining anchor cables are selected as anchor cables) from low to high.
MG400 anchor bolt support stress load security risk is divided into three hierarchical values:
low risk: third, early warning value is 122kN; risk of (1): second, early warning value 137kN; high risk: first, early warning value 152KN.
The design basis is as follows: MSGLW-400/phi 22 anchor rod stress load, technical Specification requires that the yield strength of the anchor rod is not less than
400MPa, tensile strength is more than or equal to 540MPa, breaking force is more than or equal to 205kN, corresponding yield force is more than or equal to 152kN (yield force=380.1 mm < 2 >. Yield strength), and the anchor rod body is in an elastic deformation state before reaching the yield force value.
Low risk: third, early warning value 122kN (152 x 80% = 122 kN), and setting according to the fact that the anchor rod yield force is greater than or equal to 80% of 152 kN;
risk of (1): second, early warning value 137kN (152 x 90% = 137 kN), setting according to the fact that the yield force of the anchor rod is more than or equal to 90% of 152 kN;
high risk: first-order, early warning value 152kN (152 x 100% = 152 kN), according to the setting of stock yield force not less than 100% of 152kN.
The safety risk of the supporting stress load of the mining anchor cable of SKP22-1/1860 is divided into three level values:
low risk: third, early warning value is 122kN; risk of (1): second, early warning value 137kN; high risk: first, early warning value 152KN.
The design basis is as follows: the stress load of the mining anchor cable of SKP22-1/1860, technical Specification requires that the tensile strength of the anchor cable is more than or equal to 1860MPa, the breaking force is more than or equal to 583kN (breaking force=313.0mm2. Times. Tensile strength), the corresponding yield force is more than or equal to 513kN, and the anchor cable rod body is in an elastic deformation state before reaching the yield force value.
Low risk: third, early warning value 410kN (513 x 80% = 410 kN), and setting according to the yield force 80% of the anchor cable yield force not less than 513 kN;
risk of (1): secondly, early warning values 461kN (513 x 90% = 461 kN) are set according to the yield force 90% of the anchor cable yield force which is more than or equal to 513 kN;
high risk: first-order, early warning value 513kN (513 x 100% = 513 kN), and setting according to the yield force 100% of the yield force of the anchor cable equal to or larger than 513 kN.
2. And eliminating emergency treatment measures by grading early warning hidden danger.
A. Emergent handling is eliminated to tertiary early warning hidden danger:
three-level early warning occurs, and a three-level early warning response mechanism taking the technical science as a first responsible person is started. And starting the emergency response system, and synchronously pushing and notifying related level management personnel of the early warning information. Receiving the early warning information, the production technology department preliminarily judges whether the real early warning is carried out or not through system software analysis (historical curve change inquiry), and a base unit immediately informs a manager above a field team leader to verify the condition of the top plate of the station roadway and the nearby supporting condition on site and synchronously verifies the condition; and after the real early warning is verified on site, reporting the real early warning to a dispatching center. The relevant personnel such as the department of the organization of the department of the production technology of the scheduling notification, an Jianke check the site, correspond to regulation measures, supplement and perfect the scheduling notification early warning treatment measures, and immediately strengthen and treat the basic responsibility units according to the regulations of the operation regulations (emergency plans), and the issuing business contact book of the department of the production technology is completed in a limited period.
B. Second-level early warning hidden danger elimination emergency treatment:
and (3) generating secondary early warning, and starting a secondary early warning response mechanism taking the sub-management senior citizen as a first responsible person. And starting the emergency response system, and synchronously pushing and notifying related level management personnel of the early warning information. Receiving the early warning information, the production technology department preliminarily judges whether the real early warning is carried out or not through system software analysis (historical curve change inquiry), and a base unit immediately informs a manager above a field team leader to verify the condition of the top plate of the station roadway and the nearby supporting condition on site and synchronously verifies the condition; and after the real early warning is verified on site, reporting the real early warning to a dispatching center. The scheduling notification is used for notifying relevant personnel such as branch and senior main lead organization technical departments, ground survey departments, an Jianke and the like to check the site, corresponding rule measures are provided, the early warning treatment measures are supplemented and perfected, the basic responsibility units immediately strengthen and treat according to the rules of operation (emergency plans), and the issuing service contact book of the production technical departments is completed in a limited period.
C. First-level early warning hidden danger elimination emergency treatment:
and a first-level early warning occurs, and a first-level early warning response mechanism taking a master worker as a first responsible person is started. And starting the emergency response system, and synchronously pushing and notifying related level management personnel of the early warning information. Receiving the early warning information, the production technical department preliminarily judges whether the early warning is real or not through system software analysis (historical curve change inquiry), and a base unit immediately informs a manager above the field team level to verify the condition of the field roadway roof and the supporting condition near the measuring station and synchronously verifies the condition; after the verification site is the real early warning, reporting the dispatching office. The scheduling informs the mining master to draw head organization and divide the relevant units such as the deep manager, technical science, geodetic department, an Jianke and the like to go into the well to check the site, the corresponding rule measures provide, the targeted site safety disposal scheme and the safety construction measures are supplemented and formulated, and the basic responsibility unit is responsible for implementation.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. The mine pressure monitoring substation is in communication connection with the mine pressure monitoring unit equipment, and the mine pressure monitoring substation is connected into the underground mine pressure data acquisition substation through a communication optical cable;
the system comprises a well, a mining pressure monitoring and early warning system and a mining pressure monitoring and early warning system, wherein the well is provided with a PC end installed on the well, the PC end comprises comprehensive monitoring and analysis software and an early warning short message pushing platform, the comprehensive monitoring and analysis software sends short message early warning information to a user through the early warning short message pushing platform, and if the early warning information is true, the user judges whether the early warning information is true, carries out mining pressure monitoring and early warning classification, and carries out scheduling and classification treatment according to different early warning layers;
and the ore pressure data acquisition substation is in communication connection with the PC end through an ore industry Ethernet.
2. The system for controlling the safe closed loop of the roof of an underground coal mine roadway according to claim 1, wherein: the PC end also comprises a mine comprehensive informatization module and a comprehensive monitoring analysis module.
3. The system for controlling the safe closed loop of the roof of an underground coal mine roadway according to claim 1, wherein: the mine pressure monitoring unit equipment comprises a plurality of groups of surrounding rock movement monitoring devices, anchor rod stress monitoring devices and anchor cable stress monitoring devices which are arranged on a surrounding rock wall (6).
4. A safety closed loop control system for an underground coal mine roadway roof as recited in claim 3, wherein: the surrounding rock mobile monitoring device comprises a deep monitoring base point anchor (2) and a shallow monitoring base point anchor (5) positioned below the deep monitoring base point anchor, wherein the deep monitoring base point anchor (2) and the shallow monitoring base point anchor (5) are both installed in a top plate installation hole (1) formed in a surrounding rock wall (6), the tops of the deep monitoring base point anchor (2) and the shallow monitoring base point anchor (5) are both fixed into the top plate installation hole (1) through cat paws (3), and the bottoms of the deep monitoring base point anchor (2) and the shallow monitoring base point anchor (5) are both connected to tubular screws (9) through steel wires (4);
the top of tubular screw (9) is installed and is sealed tray (8), and sensor sleeve (7) are installed at the top of sealing tray (8), and wherein in the roof mounting hole (1) were stretched into at the top of sensor sleeve (7), install country rock movement sensor (10) on sensor sleeve (7), country rock movement sensor (10) are connected with sensor (11) again.
5. A safety closed loop control system for an underground coal mine roadway roof as recited in claim 3, wherein: the anchor rod stress monitoring device comprises an anchor rod body (12), wherein the anchor rod body (12) is fixed into an anchor rod hole (13) formed in a surrounding rock wall (6) through a first resin anchoring agent (14), an anchor rod tray (16) is connected to the outer side of the anchor rod body (12), and a nylon antifriction washer (17), a steel washer (18) and a nut (19) are sequentially connected to one side of the anchor rod tray (16);
and the anchor rod tray (16) is also provided with a first pressure strain force transducer (20), and the first pressure strain force transducer (20) is electrically connected to a first stress transducer (21).
6. A safety closed loop control system for an underground coal mine roadway roof as recited in claim 3, wherein: the anchor rope stress monitoring device comprises an anchor rope rod body (22), wherein the anchor rope rod body (22) is fixed into an anchor rope hole (23) formed in a surrounding rock wall (6) through a second resin anchoring agent (24), an anchor rope tray (27) is connected to the outer side of the anchor rope rod body (22), a lock (29) used for fixing the anchor rope rod body (22) is arranged on one side of the anchor rope tray (27), a locking clamping piece (30) is arranged on one side of the lock (29), and a core adjusting ball pad (28) is arranged on the lock (29) towards the outer side of the anchor rope tray (27);
and a second pressure strain force transducer (30) is further arranged on the anchor cable tray (27), and the second pressure strain force transducer (30) is electrically connected to the second stress transducer (26).
7. A method of operating an underground coal mine roadway roof safety closed loop control system as claimed in any one of claims 1 to 6, comprising the steps of:
s1, designing and installing a comprehensive monitoring station and a daily monitoring station in an underground roadway;
s2, mounting of a comprehensive monitoring station: firstly, three groups of comprehensive monitoring stations are arranged within the range of 100m in front of a tunneling construction roadway, and a group of comprehensive monitoring stations is arranged every 200m later, and can be arranged in an encryption mode according to the condition of a field roof;
s3, installing a group of surrounding rock mobile monitoring devices in each group of comprehensive monitoring stations;
s4, installing four anchor rod or anchor cable monitoring devices in each group of comprehensive monitoring stations to monitor the working load stress of the anchor rods or anchor cables;
s5, mounting a daily monitoring station: a group of roof separation layer observation stations are arranged every 50m, encryption arrangement is carried out according to the scene condition, the number of measuring points in the hole is 2, and if the comprehensive monitoring stations are arranged at 50m positions, the daily monitoring stations are not arranged any more;
s6, when the comprehensive monitoring station or the daily monitoring station monitors the movement of surrounding rock of a tunnel roof and the stress value change of an anchor rod or an anchor cable reaches an early warning value, information is sent to an industrial PC end on a well through an industrial Ethernet;
s7, starting a multi-department safety emergency response management system and an emergency treatment linkage mechanism, and synchronously pushing early warning information to inform related level management personnel;
s8, receiving early warning information, analyzing and primarily judging whether the early warning is real or not by the production technology through system software, immediately informing a manager above a field team leader by a basic unit, checking the condition of the top plate of the station roadway and the nearby supporting condition on site, and synchronously verifying;
s9, after the real early warning is verified on site, reporting the dispatching department, correspondingly informing technical departments and related leaders according to different early warning levels by the dispatching department, checking the site by related personnel of the lead organization, making hidden danger elimination treatment measures, immediately reinforcing and treating responsibility units according to the regulations of the operation regulations, and completing the issuing of service contact books by the technical departments.
8. The method of operation of an underground coal mine roadway roof safety closed loop control system of claim 7, wherein: in the step S9, the security risk of surrounding rock movement is divided into three hierarchical values, wherein:
the low risk is three-level, the early warning value is 50mm, and the early warning value is set according to 5% of the elongation of the 4.0m free section of the anchor cable;
the medium risk is the second level, the early warning value is 120mm, and the early warning value is set according to 5% of the elongation of the 4.0m free section of the anchor cable;
the high risk is first-level, the early warning value is 180mm, and the early warning value is set according to 5% of the elongation of the 4.0m free section of the anchor cable; and when the separation value of the roof of the single-day roadway is more than or equal to 30mm and the accumulation of the separation value of continuous 7 days is more than or equal to 50mm, carrying out primary early warning treatment on the same risk.
9. The method of operation of an underground coal mine roadway roof safety closed loop control system of claim 7, wherein: in the step S9, the safety risk of the stress load of the anchor bolt support is divided into three hierarchy values, wherein:
the low risk is three-level, the early warning value is 122kN, and the early warning value is set according to 80 percent of the anchor rod yield force which is more than or equal to 152 kN;
the medium risk is the second level, the early warning value is 137kN, and the early warning value is set according to 90 percent of the anchor rod yield force which is more than or equal to 152 kN;
the high risk is the first level, the early warning value is 152kN, and the early warning value is set according to 100% of the anchor rod yield force which is more than or equal to 152kN.
10. The method of operation of an underground coal mine roadway roof safety closed loop control system of claim 7, wherein: in the step S9, the security risk of the anchor rope supporting stress load is divided into three hierarchy values, wherein:
the low risk is three-level, the early warning value is 410kN, and the early warning value is set according to the yield force of the anchor cable being more than or equal to 513kN by 80 percent;
the medium risk is a secondary, the early warning value is 461kN, and the early warning value is set according to the yield force of the anchor cable which is more than or equal to 513kN by 90 percent;
the high risk is the first level, the early warning value is 513kN, and the early warning value is set according to the yield force of the anchor cable being more than or equal to 513kN by 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310993982.8A CN116927884A (en) | 2023-08-07 | 2023-08-07 | Safety closed loop control system for roof of underground coal mine tunnel and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310993982.8A CN116927884A (en) | 2023-08-07 | 2023-08-07 | Safety closed loop control system for roof of underground coal mine tunnel and operation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116927884A true CN116927884A (en) | 2023-10-24 |
Family
ID=88380852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310993982.8A Pending CN116927884A (en) | 2023-08-07 | 2023-08-07 | Safety closed loop control system for roof of underground coal mine tunnel and operation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116927884A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117627705A (en) * | 2024-01-25 | 2024-03-01 | 中国矿业大学(北京) | Underground engineering support monitoring equipment and underground engineering support monitoring method |
| CN118691124A (en) * | 2024-08-26 | 2024-09-24 | 湖南明建云信息科技有限公司 | Project progress and cost management method based on resource consumption and management and control reference algorithm |
-
2023
- 2023-08-07 CN CN202310993982.8A patent/CN116927884A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117627705A (en) * | 2024-01-25 | 2024-03-01 | 中国矿业大学(北京) | Underground engineering support monitoring equipment and underground engineering support monitoring method |
| CN117627705B (en) * | 2024-01-25 | 2024-03-22 | 中国矿业大学(北京) | Underground engineering support monitoring equipment and underground engineering support monitoring method |
| CN118691124A (en) * | 2024-08-26 | 2024-09-24 | 湖南明建云信息科技有限公司 | Project progress and cost management method based on resource consumption and management and control reference algorithm |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN116927884A (en) | Safety closed loop control system for roof of underground coal mine tunnel and operation method thereof | |
| CN104655101B (en) | High Precision Traverses formula tunneling boring stability of slope monitoring and warning system and its monitoring method | |
| US20230051333A1 (en) | Directional Drilling-Exploring-Monitoring Integrated Method for Guaranteeing Safety of Underwater Shield Tunnel | |
| CN101519963A (en) | Filling mining multi-information dynamic monitoring method | |
| CN116046063B (en) | Method for monitoring prestress anchor bolt support of deep soft rock roadway | |
| CN210483736U (en) | Real-time monitoring system for shield cutter abrasion | |
| CN115163192A (en) | Coal mine roadway mine pressure monitoring equipment and early warning, forecasting and analyzing method | |
| CN115726809A (en) | Comprehensive control method for three-dimensional stope surrounding rock deformation under high-stress complex condition | |
| CN102691520A (en) | Monitoring system for heading face | |
| Fuławka et al. | Monitoring of the stability of underground workings in Polish copper mines conditions | |
| CN204479065U (en) | A kind of High Precision Traverses formula tunneling boring stability of slope monitor and early warning system | |
| CN102691521A (en) | Installation method for driving working face monitoring system | |
| CN111677533A (en) | Tunnel primary support invasion limit arch changing construction method | |
| CN111577390A (en) | Tunnel rock burst micro-seismic monitoring, judging and early warning construction method | |
| CN104590964A (en) | Lifting steel wire rope tension monitoring device | |
| Villaescusa et al. | Ground support investigations and practices at Mount Isa | |
| CN117627727A (en) | System and method for detecting health of undercut tunnel structure | |
| CN113155181B (en) | Intelligent monitoring collaborative early warning system and method for underground structure health | |
| CN210268562U (en) | Digital display roof separation layer displacement alarm | |
| CN114561945A (en) | Hydraulic shearing type recyclable intelligent anchor cable and recycling method thereof | |
| CN218669332U (en) | Fatigue monitoring device and fatigue monitoring system for directional drilling drill rod | |
| Yanagimura et al. | A monitoring strategy to assess the effectiveness of pillar wrapping | |
| CN207093142U (en) | A kind of coal mine work area top plate dynamic monitoring system | |
| CN109205469A (en) | A kind of split type structure of electric block and its electric control system | |
| CN111255518B (en) | Roof separation layer appearance alarm device and colliery roof monitored control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |