A goaf collapse identification and alarm device

Abstract

The invention discloses a goaf collapse identification and alarm device, which relates to the technical field of goaf governance, and includes an automatic protection mechanism and an automatic cutting mechanism; the automatic protection mechanism includes: a bottom plate, a knob, a ratchet, a buckle, a compression spring I, a steel wire rope I, an extension plate, a sleeve, a cylindrical block, a connecting rod I, a vertical bracket, a lever, and a steel wire rope II; the knob is rotatably mounted on a rotating ring below the bottom plate, the ratchet is fixedly mounted below the bottom plate, and the position of the ratchet is inside the knob. When the invention is in use, an optical cable is brought into the goaf from a vertical shaft, a plurality of groups of optical cables are neatly arranged in a horizontally staggered manner, the optical cables are fixed on the top inside the goaf, and then various sensors are drilled and installed at staggered positions, and the sensors are connected to optical cable lines to form a staggered sensing network system, and each group of optical cables is independent of each other, so that even if collapse occurs, monitoring can continue through the independent optical cables that have not been damaged.

Description

Technical Field

[0001] The invention relates to the technical field of goaf area management, and in particular to a goaf area collapse identification and alarm device. Background Art

[0002] In underground mining, such as coal mining, the identification and monitoring of goafs are crucial to preventing safety accidents. Goafs may cause collapse, fire and other safety accidents due to geological structure changes, gas accumulation and other reasons, so they need to be monitored.

[0003] A Chinese patent with publication number CN118091053A discloses a goaf monitoring system for coal mines. A network switch is connected to a detection control host through wires. After the detection control host passes through the sealing wall of the return air lane of the working face through the detection connecting pipe, multiple sections of spliced ​​detection connecting pipes extend all the way to the goaf. A detection node is connected in series every 150 to 200 meters. A hole is opened on the surface of the detection node to install an air intake pipe interface. The air intake pipe interface is connected to an upper even-angle probe tube extending upward, and the upper even-angle probe tube is kept in an upright state by nails or hanging ropes.

[0004] A Chinese patent with publication number CN111637864A discloses a goaf area monitoring device, including several measuring sleeves, the bottom of the outermost measuring sleeve is closed, the outermost measuring sleeve is provided with a sealing sleeve, the measuring sleeve and the sealing sleeve are correspondingly provided with annular grooves, a sealing piston is provided in the annular groove, the sealing piston, the measuring sleeve and the sealing sleeve are combined to form a measuring cavity, the measuring cavity is filled with measuring gas, the top of the innermost measuring sleeve is closed, a telescopic partition assembly is provided in the innermost measuring sleeve, the telescopic partition assembly divides the inside of the measuring sleeve into connecting cavities, each connecting cavity is connected to a measuring cavity through a connecting pipe, and a monitoring airbag is connected to the top of the connecting cavity through a hose.

[0005] The above patent cannot realize distributed global monitoring when in use, the monitoring results are random, and the equipment will be damaged and unable to continue monitoring when a collapse accident occurs. The present invention is designed to address the above defects. The present invention adopts DAS (Distributed Acoustic The invention discloses a distributed optical fiber acoustic wave sensing technology, which is a technology that uses optical fiber as a sensing medium to detect signals such as sound or vibration within the audio range by detecting the phase change of the optical signal transmitted in the optical fiber. When sound or vibration acts on the optical fiber, it will cause the phase change of the optical signal transmitted in the optical fiber. By detecting this change and demodulating it, quantitative measurement of external physical quantities can be achieved. When the invention is used, the optical cable is brought into the goaf area from the shaft, and multiple groups of optical cables are neatly arranged in a horizontally staggered manner, and the optical cables are fixed on the top of the goaf. Then, various sensors are drilled and installed at the staggered positions, and the sensors are connected to the optical cable lines to form a staggered sensing network system. Each group of optical cables is independent of each other. Even if a collapse occurs, monitoring can be continued through the independent optical cables that have not been damaged. The device can also perform emergency protection on several sensors at the collapsed location when a collapse occurs. The signal alarm generated by the sensor triggers the automatic protection mechanism to tighten the triangle plate to protect the sensor, prevent the sensor from being damaged by the collapse, and facilitate recycling and reuse to reduce costs. Summary of the invention

[0006] In view of the above technical problems, the present invention discloses a goaf collapse identification and alarm device, which can effectively solve the problems raised in the background technology.

[0007] A goaf collapse identification alarm device includes an automatic protection mechanism and an automatic cutting mechanism; the automatic protection mechanism includes: a bottom plate, a knob, a ratchet, a buckle, a compression spring I, a wire rope I, an extension plate, a sleeve, a cylindrical block, a connecting rod I, a vertical bracket, a lever, and a wire rope II; the knob is rotatably mounted on a rotating ring below the bottom plate, the ratchet is fixedly mounted below the bottom plate, and the position of the ratchet is inside the knob, the buckle is rotatably mounted on a short shaft on the knob, the inner side end of the buckle is clamped on the oblique teeth of the ratchet, the compression spring I is also mounted on the knob, and the two ends of the compression spring I are respectively in contact with the buckle and the protrusions on the knob. One end of the wire rope I is fixedly connected to the protrusion on the knob, and the wire rope I also passes through the circular hole on the extension plate. The circular hole is provided with a circular arc chamfer, and the extension plate is fixedly installed on the base plate; the sleeve is fixedly installed at the center position below the base plate, and the cylindrical block is slidably installed in the sleeve on the inner ring of the ratchet. A spring is also provided in the sleeve, and the spring is in contact with the cylindrical block. One end of the connecting rod I is rotatably installed on the hinge seat on the side of the cylindrical block, and the other end of the connecting rod I is in sliding contact with the upper end of the lever. The lever is rotatably installed on the axis of the vertical bracket, and the vertical bracket is fixedly installed under the base plate. The lower end of the lever is fixedly connected to one end of the wire rope II.

[0008] Preferably, the automatic protection mechanism also includes: a base plate, a triangular plate, a tension spring, a sensor, a fixed bracket and a shedding assembly; there are four triangular plates, all of which are rotatably mounted on the rotating shafts on the four sides of the base plate, the two ends of the tension spring are respectively connected to the base plate and the hooks on the triangular plate, the sensor is installed in the middle position of the base plate and fixed by the fixed bracket on the base plate.

[0009] Preferably, the falling-off assembly comprises: a ring, a gasket, a bolt, a sleeve, and a connecting head; the ring is fixedly connected to the other end of the steel wire rope I, the ring is slidably mounted on the bolt, the bolt is fixed in the sleeve, and the sleeve is nailed in the wall at the top of the goaf; the connecting head is welded to the triangular plate, and the connecting head is slidably connected to the bolt; the gasket is stuck in the groove on the bolt, and the gasket is fixedly connected to the other end of the steel wire rope II.

[0010] Preferably, the automatic cutting mechanism includes: an optical cable, a horizontal plate, a horizontal knife, a compression spring II, an extrusion rod, a latch, an electric push rod and a linkage knocking assembly; the optical cable is embedded in the upper part of the goaf, the horizontal plate is fixedly installed on the wall in the goaf, the circular holes at both ends of the horizontal knife are slidably connected to the short rods on the protruding plates at both ends of the horizontal plate, and a compression spring II is installed on the short rod, and the two ends of the compression spring II are respectively in contact with the protruding plates on the horizontal plate and the circular holes at both ends of the horizontal knife; the extrusion rod is slidably installed in the slide groove on the side of the horizontal plate, and at the same time, the extrusion rod is slidably connected to the slot on the latch, the latch is slidably connected to the square holes on the horizontal plate and the horizontal knife, the piston rod of the electric push rod is fixedly connected to one end of the extrusion rod, and the electric push rod is fixedly installed on the side of the horizontal plate.

[0011] Preferably, the linked knocking assembly includes: a knocking rod and a connecting rod II; one end of the knocking rod is rotatably mounted on a hinge seat below the horizontal plate, the other end of the knocking rod is below the cylindrical block, one end of the connecting rod II is rotatably connected to the hinge seat on the horizontal knife, and the other end of the connecting rod II is rotatably connected to the hinge seat in the middle of the knocking rod.

[0012] Preferably, the optical cable is provided with a plurality of loops, which are crisscrossed and inlaid on the top of the goaf.

[0013] Preferably, the gasket is provided with a notch and is elastic.

[0014] Preferably, the extrusion rod is provided with two raised inclined surfaces, and the extrusion rod is made of copper alloy.

[0015] Preferably, the sensors include optical fiber stress sensors, optical fiber displacement sensors and optical fiber microseismic sensors, and these sensors are evenly distributed and installed in different base plates.

[0016] The beneficial effects of the present invention compared with the prior art are:

[0017] 1. When the present invention is in use, the optical cables are brought into the goaf from the vertical shaft, and multiple groups of optical cables are neatly arranged in a horizontally staggered manner, and the optical cables are fixed on the top of the goaf. Subsequently, various sensors are drilled at the staggered positions to connect the sensors to the optical cable lines to form a staggered sensing network system, and each group of optical cables is independent of each other. Even if a collapse occurs, monitoring can continue through the independent optical cables that have not been damaged.

[0018] 2. This device can also provide emergency protection for several sensors at the collapsed location when a collapse occurs. The signal alarm generated by the sensor triggers the automatic protection mechanism to tighten the triangle plate to protect the sensor, preventing the sensor from being damaged by the collapse, making it convenient for recycling and reuse and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an isometric view of the overall mechanism of the present invention.

[0020] Figure 2 It is a side view of the overall structure of the present invention.

[0021] Figure 3 This is a first viewing angle diagram of the automatic protection mechanism of the present invention.

[0022] Figure 4 This is a second viewing angle diagram of the automatic protection mechanism of the present invention.

[0023] Figure 5 It is a folding state diagram of the automatic protection mechanism of the present invention.

[0024] Figure 6 It is an enlarged view of point A of the automatic protection mechanism of the present invention.

[0025] Figure 7 It is an enlarged view of point B of the automatic protection mechanism of the present invention.

[0026] Figure 8 This is a first perspective view of the automatic cutting mechanism of the present invention.

[0027] Fig. 9 This is a second viewing angle diagram of the automatic cutting mechanism of the present invention.

[0028] Fig.10 It is a top view of the automatic cutting mechanism of the present invention.

[0029] Figure numbers: 1. Base plate; 2. Triangle plate; 3. Tension spring; 4. Sensor; 5. Fixed bracket; 6. Knob; 7. Ratchet; 8. Buckle; 9. Compression spring I; 10. Wire rope I; 11. Extension plate; 12. Sleeve; 13. Cylindrical block; 14. Connecting rod I; 15. Vertical bracket; 16. Lever; 17. Wire rope II; 18. Ring; 19. Gasket; 20. Bolt; 21. Sleeve; 22. Connector; 23. Optical cable; 24. Knocking rod; 25. Horizontal plate; 26. Horizontal knife; 27. Connecting rod II; 28. Compression spring II; 29. ​​Extrusion rod; 30. Pin; 31. Electric push rod. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further specifically described below by way of embodiments and in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0031] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when in use. They are only for the convenience of describing the simplified description of the invention patent, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention patent. In addition, spatially relative terms may be used in the text for the convenience of description, such as "below", "below", "below", "above", "above", etc., to describe the relationship of an element or feature relative to other elements or features as shown in the figure. Spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation shown in the drawings. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptors used in the text may also be interpreted accordingly.

[0032] Implementation example Figure 1-Figure 10 As shown, a goaf collapse identification and alarm device includes an automatic protection mechanism and an automatic cut-off mechanism;

[0033] In an optional implementation manner of the embodiment of the present invention, as Figure 6 , Figure 7As shown, the automatic protection mechanism includes: a base plate 1, a knob 6, a ratchet 7, a buckle 8, a compression spring I9, a wire rope I10, an extension plate 11, a sleeve 12, a cylindrical block 13, a connecting rod I14, a vertical bracket 15, a lever 16, and a wire rope II17; the knob 6 is rotatably mounted on a rotating ring at the bottom of the base plate 1, the ratchet 7 is fixedly mounted under the base plate 1, and the position of the ratchet 7 is inside the knob 6, the buckle 8 is rotatably mounted on a short shaft on the knob 6, and the inner end of the buckle 8 is clamped on the oblique teeth of the ratchet 7, and the compression spring I9 is ​​also mounted on the knob 6, and the two ends of the compression spring I9 are respectively in contact with the buckle 8 and the protrusions on the knob 6, and the compression spring I9 generates elastic force; one end of the wire rope I10 is in contact with the protrusions on the knob 6 The protrusion is fixedly connected, the wire rope Ⅰ10 also passes through the circular hole on the extension plate 11, the circular hole is provided with a circular arc chamfer, and the extension plate 11 is fixedly mounted on the base plate 1; the sleeve 12 is fixedly mounted at the center position below the base plate 1, and the cylindrical block 13 is slidably mounted in the sleeve 12 on the inner ring of the ratchet 7. A spring is also provided in the sleeve 12, and the spring contacts the cylindrical block 13 and generates elastic force. One end of the connecting rod Ⅰ14 is rotatably mounted on the hinge seat on the side of the cylindrical block 13, and the other end of the connecting rod Ⅰ14 is in sliding contact with the upper end of the lever 16. The lever 16 is rotatably mounted on the axis of the vertical bracket 15, and the vertical bracket 15 is fixedly mounted under the base plate 1, and the lower end of the lever 16 is fixedly connected to one end of the wire rope Ⅱ17.

[0034] In an optional implementation manner of the embodiment of the present invention, as Figure 3 , Figure 4 As shown, the automatic protection mechanism also includes: a base plate 1, a triangular plate 2, a tension spring 3, a sensor 4, a fixed bracket 5 and a shedding component; four triangular plates 2 are provided, all of which are rotatably mounted on the rotating shafts on the four sides of the base plate 1, and the two ends of the tension spring 3 are respectively connected to the base plate 1 and the hooks on the triangular plate 2, and the sensor 4 is installed in the middle position of the base plate 1 and fixed by the fixed bracket 5 on the base plate 1.

[0035] In an optional implementation manner of the embodiment of the present invention, as Figure 7 As shown, the falling assembly includes: a ring 18, a gasket 19, a bolt 20, a sleeve 21, and a connector 22; the ring 18 is fixedly connected to the other end of the wire rope I10, the ring 18 is slidably installed on the bolt 20, the bolt 20 is fixed in the sleeve 21, and the sleeve 21 is nailed in the wall at the top of the goaf; the connector 22 is welded to the triangular plate 2, and the connector 22 is slidably connected to the bolt 20; the gasket 19 is stuck in the groove on the bolt 20, and the gasket 19 is fixedly connected to the other end of the wire rope II17.

[0036] In an optional implementation manner of the embodiment of the present invention, as Figure 8 , Fig. 9 , Fig.10As shown, the automatic cutting mechanism includes: an optical cable 23, a horizontal plate 25, a horizontal knife 26, a compression spring II 28, an extrusion rod 29, a latch 30, an electric push rod 31 and a linkage knocking assembly; the optical cable 23 is embedded in the upper part of the goaf, the horizontal plate 25 is fixedly installed on the wall in the goaf, the round holes at both ends of the horizontal knife 26 are slidably connected with the short rods on the protruding plates at both ends of the horizontal plate 25, and a compression spring II 28 is installed on the short rod, and the two ends of the compression spring II 28 are respectively in contact with the protruding plates on the horizontal plate 25 and the round holes at both ends of the horizontal knife 26, and the compression spring II 28 generates elastic force; the extrusion rod 29 is slidably installed in the slide groove on the side of the horizontal plate 25, and at the same time, the extrusion rod 29 is slidably connected with the slot on the latch 30, the latch 30 is slidably connected with the square holes on the horizontal plate 25 and the horizontal knife 26, the piston rod of the electric push rod 31 is fixedly connected with one end of the extrusion rod 29, and the electric push rod 31 is fixedly installed on the side of the horizontal plate 25.

[0037] In an optional implementation manner of the embodiment of the present invention, as Figure 8 As shown, the linked knocking assembly includes: a knocking rod 24 and a connecting rod II 27; one end of the knocking rod 24 is rotatably mounted on a hinge seat below the horizontal plate 25, and the other end of the knocking rod 24 is located below the cylindrical block 13; one end of the connecting rod II 27 is rotatably connected to a hinge seat on the horizontal knife 26, and the other end of the connecting rod II 27 is rotatably connected to a hinge seat in the middle of the knocking rod 24.

[0038] In an optional implementation manner of the embodiment of the present invention, as Figure 1 As shown, the optical cable 23 is provided with a plurality of loops, which are crisscrossed and embedded in the top of the goaf.

[0039] In an optional implementation manner of the embodiment of the present invention, as Figure 7 As shown, the gasket 19 is provided with a notch, and the gasket 19 is elastic and can be deformed.

[0040] In an optional implementation manner of the embodiment of the present invention, as Fig.10 As shown, the extrusion rod 29 is provided with two raised inclined surfaces. The extrusion rod 29 is made of copper alloy, which has high hardness and low cost.

[0041] In an optional implementation manner of the embodiment of the present invention, as Figure 1 As shown, the sensors 4 include optical fiber stress sensors, optical fiber displacement sensors and optical fiber microseismic sensors, which are evenly distributed and installed in different base plates 1 .

[0042] Working principle: When the present invention is used, it can not only monitor the goaf under normal circumstances, but also take emergency measures when collapse occurs; before collapse occurs, the sensor 4 detects abnormal data, issues an alarm, and triggers the automatic protection mechanism and the automatic cutting mechanism. First, the automatic cutting mechanism is triggered, and the electric push rod 31 on the horizontal plate 25 between the collapsed and non-collapsed part is started, driving the extrusion rod 29 to slide, and the extrusion rod 29 squeezes the latch 30, so that the latch 30 slides outward in the square hole on the horizontal plate 25 until the latch 30 is free from the limit of the horizontal knife 26. The horizontal knife 26 moves upward rapidly under the action of the compression spring II 28, and the horizontal knife 26 cuts off the upper optical cable 23 to prevent the collapsed part from pulling off the optical cable 23 at the non-collapsed part. One side of the cut-off part collapses, and the independent optical cable 23 on the other side that has not been cut off continues to monitor;

[0043] When the horizontal knife 26 moves upward, it will drive the knocking rod 24 to move upward through the linkage II 27. One end of the knocking rod 24 will knock the cylindrical block 13. The cylindrical block 13 will slide upward rapidly due to the impact force. One end of the connecting rod I 14 on the cylindrical block 13 will move upward, and the other end will squeeze the upper end of the lever 16 to rotate rightward, and the lower end of the lever 16 will rotate leftward, thereby pulling the wire rope II 17. The gasket 19 at the other end of the wire rope II 17 is pulled and separated from the bolt 20. A spring is provided between the connector 22 and the sleeve 21. In the absence of the gasket 19 to limit the position, the spring squeezes the connector 22 downward, thereby separating the ring 18 from the bolt 20. After separation, the triangular plate 2 is quickly closed under the action of the tension spring 3, thereby protecting the sensor 4.

[0044] When the automatic protection mechanism can continue to be used after recovery, first use your hands to open the triangle plate 2 to a certain angle in turn, then insert the bolt 20 into the connecting head 22, then put the ring 18 on the bolt 20, and then re-insert the gasket 19 into the groove of the bolt 20. Do this for all four triangle plates 2. After the gasket 19 is locked, turn the knob 6. The knob 6 will drive one end of the wire rope Ⅰ10 to tighten, so that the triangle plate 2 can be pulled open through the wire rope Ⅰ10, and the buckle 8 will be stuck on the bevel teeth on the ratchet 7 to prevent the knob 6 from rotating, thereby ensuring the stability of the triangle plate 2 after it is unfolded. When it is necessary to loosen the wire rope Ⅰ10, you only need to press the outer end of the buckle 8 to disengage the inner end of the buckle 8 from the bevel teeth of the ratchet 7 to rotate the knob 6 in the opposite direction to loosen the wire rope Ⅰ10.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A goaf collapse identification and alarm device, characterized in that: The invention comprises an automatic protection mechanism and an automatic cutting mechanism; the automatic protection mechanism comprises: a base plate (1), a knob (6), a ratchet (7), a buckle (8), a compression spring I (9), a steel wire rope I (10), an extension plate (11), a sleeve (12), a cylindrical block (13), a connecting rod I (14), a vertical bracket (15), a lever (16), and a steel wire rope II (17); the knob (6) is rotatably mounted on a rotating ring below the base plate (1); the ratchet (7) is fixedly mounted below the base plate (1), and the position of the ratchet (7) is inside the knob (6); the buckle (8) is rotatably mounted on a short shaft on the knob (6), and the inner side end of the buckle (8) is clamped on the oblique teeth of the ratchet (7); the compression spring I (9) is also mounted on the knob (6), and the two ends of the compression spring I (9) are respectively in contact with the buckle (8) and the protrusions on the knob (6); the steel wire rope I One end of the connecting rod (10) is fixedly connected to the protrusion on the knob (6), and the wire rope I (10) also passes through the circular hole on the extension plate (11), the circular hole is provided with a circular arc chamfer, and the extension plate (11) is fixedly installed on the bottom plate (1); the sleeve (12) is fixedly installed at the central position below the bottom plate (1), and the cylindrical block (13) is slidably installed in the sleeve (12) on the inner ring of the ratchet (7). A spring is also provided in the sleeve (12), and the spring is in contact with the cylindrical block (13). One end of the connecting rod I (14) is rotatably installed on the hinge seat on the side of the cylindrical block (13), and the other end of the connecting rod I (14) is in sliding contact with the upper end of the lever (16). The lever (16) is rotatably installed on the axis of the vertical bracket (15), and the vertical bracket (15) is fixedly installed below the bottom plate (1), and the lower end of the lever (16) is fixedly connected to one end of the wire rope II (17); The automatic cutting mechanism comprises: an optical cable (23), a horizontal plate (25), a horizontal knife (26), a compression spring II (28), an extrusion rod (29), a latch (30), an electric push rod (31) and a linkage knocking assembly; the optical cable (23) is embedded in the upper part of the goaf, the horizontal plate (25) is fixedly installed on the wall in the goaf, the circular holes at both ends of the horizontal knife (26) are slidably connected with the short rods protruding from the two ends of the horizontal plate (25), and the short rods are installed with a compression spring II (28), and the compression spring II ( The two ends of the electric push rod (31) are respectively in contact with the protruding plate on the horizontal plate (25) and the circular holes at the two ends of the horizontal knife (26); the extrusion rod (29) is slidably installed in the slide groove on the side of the horizontal plate (25), and the extrusion rod (29) is slidably connected with the slot on the latch (30), and the latch (30) is slidably connected with the square holes on the horizontal plate (25) and the horizontal knife (26); the piston rod of the electric push rod (31) is fixedly connected with one end of the extrusion rod (29), and the electric push rod (31) is fixedly installed on the side of the horizontal plate (25).

2. A goaf collapse identification and alarm device according to claim 1, characterized in that: The automatic protection mechanism further comprises: a triangular plate (2), a tension spring (3), a sensor (4), a fixed bracket (5) and a shedding assembly; the triangular plate (2) is provided with four, all of which are rotatably mounted on the rotating shafts on the four sides of the base plate (1); the two ends of the tension spring (3) are respectively connected to the base plate (1) and the hooks on the triangular plate (2); the sensor (4) is mounted at the middle position of the base plate (1) and fixed by the fixed bracket (5) on the base plate (1).

3. A goaf collapse identification and alarm device according to claim 2, characterized in that: The shedding assembly comprises: a circular ring (18), a gasket (19), a bolt (20), a sleeve (21), and a connector (22); the circular ring (18) is fixedly connected to the other end of the steel wire rope I (10), the circular ring (18) is slidably mounted on the bolt (20), the bolt (20) is fixed in the sleeve (21), and the sleeve (21) is nailed into the wall at the top of the goaf; the connector (22) is welded to the triangular plate (2), and the connector (22) is slidably connected to the bolt (20); the gasket (19) is stuck in the groove on the bolt (20), and the gasket (19) is fixedly connected to the other end of the steel wire rope II (17).

4. The goaf collapse identification and alarm device according to claim 1, characterized in that: The linkage knocking assembly comprises: a knocking rod (24) and a connecting rod II (27); one end of the knocking rod (24) is rotatably mounted on a hinge seat below the horizontal plate (25), the other end of the knocking rod (24) is located below the cylindrical block (13), one end of the connecting rod II (27) is rotatably connected to the hinge seat on the horizontal knife (26), and the other end of the connecting rod II (27) is rotatably connected to the hinge seat in the middle of the knocking rod (24).

5. The goaf collapse identification and alarm device according to claim 1, characterized in that: The optical cable (23) is provided with a plurality of loops, which are crisscrossed and inlaid on the top of the goaf.

6. The goaf collapse identification and alarm device according to claim 3, characterized in that: The gasket (19) is provided with a notch and is elastic.

7. The goaf collapse identification and alarm device according to claim 1, characterized in that: The extrusion rod (29) is provided with two raised inclined surfaces, and the extrusion rod (29) is made of copper alloy.

8. The goaf collapse identification and alarm device according to claim 2, characterized in that: The sensors (4) include optical fiber stress sensors, optical fiber displacement sensors and optical fiber microseismic sensors, and these sensors are evenly distributed and installed in different base plates (1).

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