CN110630331A - Coal mine support deformation early warning device and implementation method thereof - Google Patents
Coal mine support deformation early warning device and implementation method thereof Download PDFInfo
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- CN110630331A CN110630331A CN201910983063.6A CN201910983063A CN110630331A CN 110630331 A CN110630331 A CN 110630331A CN 201910983063 A CN201910983063 A CN 201910983063A CN 110630331 A CN110630331 A CN 110630331A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The invention discloses a coal mine support deformation early warning device and an implementation method thereof, wherein the coal mine support deformation early warning device comprises a support deformation early warning device main body, and an explosion-proof box, a communication optical cable, a support net, a support frame body, a first group of laser intrusion detectors, a second group of laser intrusion detectors, a third group of laser intrusion detectors, a displacement sensor, a coal slope, a wood board, a ground control room and an acousto-optic alarm lamp are arranged on the support deformation early warning device main body; an STM32 main controller, a photoelectric converter, a positioner and a switching power supply are arranged in the explosion-proof box, and the photoelectric converter is connected with an original underground communication optical cable through a jumper wire and an optical fiber connector box; and the top end of one side column of the support frame body is fixedly provided with an acousto-optic alarm lamp. In actual use, the device is simple and firm to install, can effectively monitor the bending deformation degree of the support and the translation amount of the coal side, can accurately position, and is suitable for being popularized and used in local and temporary support places under a coal mine.
Description
Technical Field
The invention relates to the technical field related to coal mine underground support safety early warning, in particular to a coal mine support deformation early warning device and an implementation method thereof.
Background
In the process of mining, the top plate can deform to different degrees due to pressure change, and generally cracks appear along the joint of the top plate firstly and are accompanied with the generation of a delamination phenomenon. If the protection is improper or the supporting quality is poor, the pressure is continuously increased, the rock deformation exceeds the limit, and then fracture, collapse, rib spalling or local roof fall can occur. At present, the main support technology adopted in the underground at home and abroad is anchor net cable support, and the construction process flow is that holes are reasonably arranged in a top plate rock-soil body, anchor rods and anchor cables with certain lengths are installed, and pressure grouting is carried out, so that the anchor rods and the rock-soil body form a complex, and the self structure and the slope stability are enhanced; then, a reinforcing mesh is laid on the slope surface, reinforcing ribs (such as I-shaped steel and the like) are reasonably welded, and concrete is sprayed, so that the slope surface forms a whole, deformation is prevented, and the compressive resistance is improved; and finally, carrying out anchor cable prestress tensioning and anchoring, and additionally spraying first-time concrete after excavating and repairing the slope on the unstable soil layer.
The roof collapse accident is generally caused by the phenomena that a small amount of coal blocks and stones on the top plate fall off, the support net bears a large amount of coal blocks and stones and then deforms and gradually bends until the support net and the support frame body thereof exceed the maximum bearing capacity, and the support frame body bends or breaks, so that the roof collapse accident occurs; in addition, the support frame body is deformed and not repaired in time due to the impact of external force such as a mine car, and the like, so that the bearing capacity of the support frame body is reduced, the service life is shortened, and potential safety hazards are caused.
In general, coal mine roof fall accidents are accompanied by casualties and huge property loss, and the direct embodiment of the coal mine roof fall is deformation or collapse of underground supports. Therefore, if the first time is found and the alarm is given out in the early stage of deformation, coal upper translation or caving of the supporting net and the supporting frame body, more escape time can be won for field construction personnel, and therefore casualties and property loss are reduced. Therefore, the underground support deformation monitoring and safety early warning system based on the laser intrusion detector has important practical significance.
Disclosure of Invention
The invention aims to provide a coal mine support deformation early warning device and an implementation method thereof, which can find and alarm at the first time in the early stage of support deformation, coal side translation or caving occurrence and strive for more escape time for field construction personnel.
In order to achieve the purpose, the invention provides the following technical scheme: the coal mine support deformation early warning device comprises a support deformation early warning device main body, wherein an explosion-proof box, a communication optical cable, a support net, a support frame body, a first group of laser intrusion detectors, a second group of laser intrusion detectors, a third group of laser intrusion detectors, a displacement sensor, a coal side, a wood board, a ground control room and a sound-light alarm lamp are arranged on the support deformation early warning device main body; the explosion-proof box is fixedly installed on the ground, an STM32 main controller, a photoelectric converter, a positioner and a switching power supply are arranged in the explosion-proof box, an expansion port is arranged on the STM32 main controller, signal output ports of the first group of laser intrusion detectors, the second group of laser intrusion detectors, the third group of laser intrusion detectors and the displacement sensor are respectively and electrically connected with the expansion port, a two-way communication port of the positioner is electrically connected with the STM32 main controller, the photoelectric converter is electrically connected with the signal output port of the STM32 main controller, the photoelectric converter is connected with an original underground communication optical cable through a jumper wire and an optical fiber connector box, and the communication optical cable is communicated to a ground control room; the top end of the support frame body is fixedly provided with a support net, a local or temporary support area top plate is arranged above the support net, the transmitting ends of the first group of laser intrusion detectors, the second group of laser intrusion detectors and the third group of laser intrusion detectors are sequentially fixed on the support frame body from top to bottom, and the corresponding receiving ends are arranged on the support frame body of the opposite surface; two displacement sensors are fixedly mounted on a side column close to the coal side in the supporting frame body, and a wood plate with a smooth surface is fixedly mounted on the coal side; support body side post top fixed mounting has the audible-visual alarm lamp, the control port of audible-visual alarm lamp is direct to link to each other with STM32 main control unit electrical property.
Preferably, the transmitting end and the receiving end of the first group of laser intrusion detectors, the second group of laser intrusion detectors and the third group of laser intrusion detectors are all horizontally arranged, and laser lines are communicated.
Preferably, the first group of laser intrusion detectors, the second group of laser intrusion detectors and the third group of laser intrusion detectors all adopt ABJ-XXX-12 type laser intrusion detectors.
Preferably, the two displacement sensors are both FTM-50S type laser displacement sensors.
Preferably, the photoelectric converter adopts an HTB-1100S-25AB type single-mode single-fiber photoelectric converter.
Preferably, the two displacement sensors are horizontally arranged, and the laser lines are respectively vertical to the wood board.
Preferably, first group laser intrusion detector, second group laser intrusion detector, third group laser intrusion detector, displacement sensor and locator all are supplied power by switching power supply, switching power supply input switches on 220V commercial power in the pit of colliery.
Compared with the prior art, the invention has the beneficial effects that: the invention relies on the existing ground control room, underground communication optical cables and anchor net cable supporting structures, and adopts sensor detection technology, intelligent control technology, optical transmission technology and the like, so that the early-stage detection and alarm can be found and given out at the first time when the deformation of the support, the translation of the coal side or the caving occurs, and more escape time can be won for field construction personnel.
The invention has the following specific beneficial effects:
1. the device can effectively monitor the bending deformation degree of the supporting net and the supporting frame body and the translation amount of the coal upper, and realize threshold value alarm.
2. The underground local and temporary support can be interconnected and positioned, the ground control room can dynamically check each group of monitoring information, and the alarm position can be obtained at the first time.
3. Early warning is carried out in the early stage of roof fall, and on-site warning can be carried out, so that more escape time is strived for underground on-site construction personnel, and the lives of the personnel are saved.
4. The technical scheme includes that an STM32 main controller and a circuit board thereof, a plurality of groups of ABJ-XXX-12 type laser intrusion detectors, an FTM-50S type laser displacement sensor, an HTB-1100S-25AB type single-mode single-fiber photoelectric converter and a positioner are adopted, so that the bending deformation degree of a supporting net and a supporting frame body, coal slope translation amount data and supporting position information can be effectively obtained. The detected laser cutoff signal, displacement signal and positioning information are transmitted to an STM32 control chip, an electric signal control command is sent after the signals are identified and processed, the signals are changed into optical signals through a photoelectric converter, the optical signals are transmitted to a ground control room by attaching to the underground original flame-retardant communication optical cable as an optical signal transmission path, and alarm and positioning information is obtained after the signals are processed.
An STM32 main controller and a circuit board thereof: the STM32 main controller is responsible for collecting the detection signal of three groups of laser intrusion detectors, two displacement sensor, when surpassing safe threshold value, starts the locator to transmit locating signal, alarm signal and displacement variable signal to photoelectric converter together, convey to the ground control room by wire jumper and communication optical cable again.
ABJ-XXX-12 type laser intrusion detector: 650nm visible light or 808nm invisible laser is used as a light source, two adjacent beams are selected in an alarm triggering mode to simultaneously block and alarm so as to avoid the false alarm condition caused by accidental factors, the power supply voltage is DC12V, the current of an emission end is 800-2000mA, the current of a receiving end is 250mA, the suitable temperature range of the working environment is-40-60 ℃, and the shell is made of stainless steel.
FTM-50S type laser displacement sensor: 650nm visible light is adopted, the power supply voltage is DC5V, the range is 0.05 m-70 m, the resolution is 0.1mm (which can be reasonably selected according to actual conditions), and the suitable temperature range of the working environment is-20 ℃ to 70 ℃. Both lasers are used downhole for long periods of time, requiring timed cleaning of the emitter lens (and receiver lens).
HTB-1100S-25AB type single-mode single-fiber photoelectric converter: the power supply voltage is DC5V, the current is 1A/2A, the working temperature is 0-60 ℃, and the transmission distance is 25 km. The sensors and the photoelectric converter are powered by a plurality of groups of switching power supplies.
In actual use, the device is simple and firm to install, can effectively monitor the bending deformation degree of the support and the translation amount of the coal side, can accurately position, and is suitable for being popularized and used in local and temporary support places under a coal mine.
Drawings
FIG. 1 is a schematic diagram of a main structure of a coal mine support deformation early warning device and an implementation method thereof;
FIG. 2 is a block diagram of the system architecture of the present invention;
FIG. 3 is a circuit diagram of the output of the switching power supply of the present invention;
in the figure: 1-supporting deformation early warning device main body; 2-explosion-proof box; 3-a communication optical cable; 301-fiber optic splice closure; 302-jumper wire; 4-supporting a net; 5-supporting the frame body; 6-a first set of laser intrusion detectors; 7-a second set of laser intrusion detectors; 8-a third set of laser intrusion detectors; 9-a displacement sensor; 10-coal upper; 11-wood board; 12-ground control room; 13-acousto-optic alarm lamp; 14-STM32 master controller; 15-a photoelectric converter; 16-a locator; 17-switching power supply.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: a coal mine support deformation early warning device and an implementation method thereof comprise a support deformation early warning device main body 1, wherein an explosion-proof box 2, a communication optical cable 3, a support net 4, a support frame body 5, a first group of laser intrusion detectors 6, a second group of laser intrusion detectors 7, a third group of laser intrusion detectors 8, a displacement sensor 9, a coal slope 10, a wood board 11, a ground control room 12 and an acousto-optic alarm lamp 13 are arranged on the support deformation early warning device main body 1; the explosion-proof box 2 is fixedly installed on the ground, an STM32 main controller 14, a photoelectric converter 15, a positioner 16 and a switching power supply 17 are arranged in the explosion-proof box 2, an expansion port is arranged on the STM32 main controller 14, signal output ports of a first group of laser intrusion detectors 6, a second group of laser intrusion detectors 7, a third group of laser intrusion detectors 8 and a displacement sensor 9 are respectively and electrically connected with the expansion port, a bidirectional communication port of the positioner 16 is electrically connected with the STM32 main controller 14, a signal output port of the STM32 main controller 14 is electrically connected with the photoelectric converter 15, the photoelectric converter 15 is connected with an underground original communication optical cable 3 through a jumper 302 and an optical fiber connector box 301, and the communication optical cable 3 is communicated with a ground control room 12; the top end of the support frame body 5 is fixedly provided with a support net 4, a local or temporary support area top plate is arranged above the support net 4, the transmitting ends of the first group of laser intrusion detectors 6, the second group of laser intrusion detectors 7 and the third group of laser intrusion detectors 8 are sequentially fixed on the support frame body 5 from top to bottom, and the corresponding receiving ends are arranged on the support frame body 5 of the opposite surface; two displacement sensors 9 are fixedly mounted on a side column close to a coal side 10 in the supporting frame body 5, and a wood board 11 with a smooth surface is fixedly mounted on the coal side 10; support 5 side post top fixed mounting of support body has acousto-optic warning lamp 13, the direct 14 electrical property continuous with STM32 main control unit of control port of acousto-optic warning lamp 13.
The transmitting ends and the receiving ends of the first group of laser intrusion detectors 6, the second group of laser intrusion detectors 7 and the third group of laser intrusion detectors 8 are all horizontally arranged, and laser lines are communicated.
The first group of laser intrusion detectors 6, the second group of laser intrusion detectors 7 and the third group of laser intrusion detectors 8 are ABJ-XXX-12 type laser intrusion detectors.
Wherein, the two displacement sensors 9 both adopt FTM-50S type laser displacement sensors.
The photoelectric converter adopts an HTB-1100S-25AB type single-mode single-fiber photoelectric converter.
Wherein, the two displacement sensors 9 are horizontally arranged, and the laser lines are respectively vertical to the wood board 11.
The first group of laser intrusion detectors 6, the second group of laser intrusion detectors 7, the third group of laser intrusion detectors 8, the displacement sensor 9 and the positioner 16 are all powered by a switch power supply 17, and the input end of the switch power supply 17 is connected with 220V mains supply under a coal mine.
The working principle is as follows:
preparing at an early stage: the STM32 main controller 14 and its circuit board are manufactured (or purchased directly), and the ground control room 12 needs to be provided with a separate computer for data processing, alarming, positioning and displaying, and depends on the original communication optical cable 3 in the underground and on the ground for signal transmission.
Mounting accessories: the positioner 16 and the HTB-1100S-25AB type single-mode single-fiber photoelectric converter 15 are placed in the prepared explosion-proof box 2, and are arranged on a reasonable position of the support frame body 5 together with the acousto-optic alarm lamp 13, and signal lines are arranged.
Installing a laser intrusion detector: installing the transmitting end of the ABJ-XXX-12 type laser intrusion detector on a pillar of a support frame body on one side of a support net, and installing a receiving end on the other side of the support net at a proper position corresponding to the pillar to ensure that a laser signal can be successfully received; in addition, three groups of ABJ-XXX-12 laser intrusion detectors are sequentially arranged on each pair of columns from top to bottom according to field conditions and empirical values.
The installation requirements and functions of the three groups of laser intrusion detectors are as follows:
the first set of laser lines is closest to the support screen 4. When the support net 4 is slightly deformed but the danger coefficient is small, two laser lines in the first group are simultaneously cut off, no alarm is generated on site, the ground control room 12 has an alarm prompt, and the specific position can be inquired on the interface, so that the relevant responsible person can conveniently process the alarm prompt;
the second group of laser lines is located at the middle position. When the supporting net 4 is greatly deformed, two laser lines in the second group are simultaneously cut off, no alarm is generated on site, the ground control room 12 has an alarm prompt, and the specific position can be inquired; in general, when the second group of laser lines is cut off, the weight of the caving coal rock borne by the support net 4 is close to the critical value, and related technicians need to check and process the weight in time;
the third group of laser lines is positioned at the lowest side and the middle upper part of the support frame body 5. When the support net 4 is seriously deformed, the support net will fall at any time, two laser lines in the third group are simultaneously cut off, and the support site and the ground control room 12 can simultaneously send out alarm signals under the processing of the STM32 main controller 14.
In addition, when the supporting frame body 5 is deformed due to external impacts of mine cars and the like, the laser emitting end or the laser receiving end can generate relative displacement along with the bending of the supporting frame body 5, the third group of laser lines are located at the lowest side of all the laser lines and the middle upper part of the supporting frame body, the generated relative displacement is the largest, the two laser lines are in circuit breaking, the supporting site and the ground control room 12 can give an alarm at the same time, and therefore the functions of effectively monitoring the bending deformation degree of the supporting net 4 and the supporting frame body 5, the translation amount of the coal upper and alarming can be achieved.
Installing a displacement sensor 9: firstly, vertically hanging a wood board 11 with a smooth surface on an upper coal body or a lower coal body; then, the FTM-50S type laser displacement sensor 9 is fixedly arranged on the support frame body 5 which is closest to the wood board 11, and the laser line is ensured to be vertical to the wood board 11. When the coal slope 10 moves or inclines, the displacement sensor 9 can monitor a displacement variable, when the variable value exceeds a set value, the displacement variable is automatically sent to the STM32 main controller 14, after identification and processing, the displacement variable is converted into an optical signal by the photoelectric converter 15, and the optical signal and the position signal are transmitted to the ground control room 12 together, so that the translation amount of the coal slope 10 can be dynamically acquired.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The coal mine support deformation early warning device comprises a support deformation early warning device main body (1) and is characterized in that: the support deformation early warning device main body (1) is provided with an explosion-proof box (2), a communication optical cable (3), a support net (4), a support frame body (5), a first group of laser intrusion detectors (6), a second group of laser intrusion detectors (7), a third group of laser intrusion detectors (8), a displacement sensor (9), a coal side (10), a wood board (11), a ground control room (12) and a sound-light alarm lamp (13); the explosion-proof box (2) is fixedly arranged on the ground, an STM32 main controller (14), a photoelectric converter (15), a positioner (16) and a switching power supply (17) are arranged in the explosion-proof box (2), the STM32 main controller (14) is provided with expansion ports, the signal output ports of the first group of laser intrusion detectors (6), the second group of laser intrusion detectors (7), the third group of laser intrusion detectors (8) and the displacement sensor (9) are respectively and electrically connected with the expansion ports, the bidirectional communication port of the locator (16) is electrically connected with the STM32 main controller (14), the signal output port of the STM32 main controller (14) is electrically connected with a photoelectric converter (15), the photoelectric converter (15) is connected with an original underground communication optical cable (3) through a jumper (302) and an optical fiber connector box (301), and the communication optical cable (3) is communicated to a ground control room (12); the top end of the support frame body (5) is fixedly provided with a support net (4), a local or temporary support area top plate is arranged above the support net (4), the transmitting ends of the first group of laser intrusion detectors (6), the second group of laser intrusion detectors (7) and the third group of laser intrusion detectors (8) are sequentially fixed on the support frame body (5) from top to bottom, and the corresponding receiving ends are arranged on the support frame body (5) of the opposite surface; two displacement sensors (9) are fixedly mounted on side columns close to the coal side (10) in the supporting frame body (5), and a wood board (11) with a smooth surface is fixedly mounted on the coal side (10); strut support frame body (5) side post top fixed mounting have acousto-optic warning lamp (13), the control port of acousto-optic warning lamp (13) is direct to link to each other with STM32 main control unit (14) electrical property.
2. The coal mine support deformation early warning device and the implementation method thereof according to claim 1 are characterized in that: the transmitting end and the receiving end of the first group of laser intrusion detector (6), the second group of laser intrusion detector (7) and the third group of laser intrusion detector (8) are all horizontally arranged, and laser lines are smooth.
3. The coal mine support deformation early warning device and the implementation method thereof according to claim 1 are characterized in that: the first group of laser intrusion detectors (6), the second group of laser intrusion detectors (7) and the third group of laser intrusion detectors (8) are all ABJ-XXX-12 type laser intrusion detectors.
4. The coal mine support deformation early warning device and the implementation method thereof according to claim 1 are characterized in that: and the two displacement sensors (9) are both FTM-50S type laser displacement sensors.
5. The coal mine support deformation early warning device and the implementation method thereof according to claim 1 are characterized in that: the photoelectric converter (15) adopts an HTB-1100S-25AB type single-mode single-fiber photoelectric converter.
6. The coal mine support deformation early warning device and the implementation method thereof according to claim 1 are characterized in that: the two displacement sensors (9) are horizontally arranged, and the laser lines are respectively vertical to the wood board (11).
7. The coal mine support deformation early warning device and the implementation method thereof according to claim 1 are characterized in that: the coal mine underground 220V electric supply mining device is characterized in that a first group of laser intrusion detectors (6), a second group of laser intrusion detectors (7), a third group of laser intrusion detectors (8), a displacement sensor (9) and a positioner (16) are all powered by a switch power supply (17), and the input end of the switch power supply (17) is connected with a coal mine underground 220V electric supply.
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| CN201910983063.6A CN110630331A (en) | 2019-10-16 | 2019-10-16 | Coal mine support deformation early warning device and implementation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502780A (en) * | 2020-11-05 | 2021-03-16 | 兰州资源环境职业技术学院 | Mine safety production management system based on local area network |
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2019
- 2019-10-16 CN CN201910983063.6A patent/CN110630331A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502780A (en) * | 2020-11-05 | 2021-03-16 | 兰州资源环境职业技术学院 | Mine safety production management system based on local area network |
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