Monitoring device for rock burst of coal mine tunnel

Abstract

The utility model discloses a monitoring device for rock burst of a coal mine tunnel, which comprises a rod type monitoring device, the rod type monitoring device is in threaded connection with a first connecting rod assembly and a support sleeve in sequence from top to bottom, and the support sleeve is in sliding connection with a second connecting rod assembly; the insertion ends of the first connecting rod assembly and the second connecting rod assembly are oppositely arranged; a top ring is arranged at the top end of the supporting sleeve and used for ejecting the insertion end of the first connecting rod assembly open and then pricking the insertion end into anchor hole soil to form a first layer of support. The outer wall of the supporting sleeve is further fixedly connected with a baffle ring, and the baffle ring is used for ejecting the insertion end of the second connecting rod assembly open and then pricking the insertion end into the anchor hole soil to form a second layer of support. A supporting matrix formed by the first connecting rod assembly and the second connecting rod assembly can reduce and resist disturbance generated by soil deformation and can also resist disturbance generated when coal miners touch the monitoring device by mistake during construction, so that the monitoring device is stably fixed in an anchor hole, and the precision, stability and continuity of monitoring rock burst are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine rock burst monitoring, in particular to a monitoring device for rock burst in coal mine tunnels. Background Art

[0002] Most of the rock burst monitoring devices installed in anchor holes on the market generally have their support parts set on the surrounding rock on the outer wall of the anchor hole, and the rod-type monitoring device extended into the anchor hole has no support. This support structure is too simple and single. When coal miners accidentally touch the rock burst monitoring device during construction in the coal mine tunnel or when the surrounding rock undergoes geological changes and produces impact, the rod-type monitoring device may become loose, resulting in the monitoring head being unable to make close contact with the surrounding rock, resulting in a decrease in monitoring accuracy, and even the rod-type monitoring device may become loose from the anchor hole and unable to monitor the rock burst.

[0003] Therefore, designing an impact ground pressure monitoring device that can provide stable support in the anchor hole to prevent it from falling off from the anchor hole has become an urgent problem to be solved. Utility Model Content

[0004] The purpose of the present utility model is to overcome the problem that the support structure adopted in the traditional rock burst rod type monitoring device has unstable support capacity and is easy to loosen from the anchor hole and cannot monitor the rock burst. A monitoring device for rock burst in coal mine tunnels is provided, and the rock burst monitoring device comprises a rod type monitoring device, a first connecting rod assembly and a second connecting rod assembly; the insertion ends of the first connecting rod assembly and the second connecting rod assembly are facing relative to each other, and the first connecting rod assembly and the second connecting rod assembly both provide double-layer support for the rod type monitoring device by opening in the anchor hole and inserting into the soil of the anchor hole channel. When the insertion ends of the two are fully inserted into the soil of the anchor hole, the support matrix formed by the two can effectively disperse the soil load, avoid the stress caused by soil deformation or external load concentration to cause the rod type monitoring device to loosen from the anchor hole and cannot monitor the rock burst, and can effectively provide stable and long-term support for the rod type monitoring device.

[0005] The present application provides a monitoring device for rock burst in a coal mine tunnel, comprising a rod-type monitoring device for use in an anchor hole to monitor soil rock burst. The rod-type monitoring device is threadedly connected to a first connecting rod assembly and a support sleeve from top to bottom, and a second connecting rod assembly is slidably connected to the support sleeve.

[0006] The first connecting rod assembly and the second connecting rod assembly are both provided with freely opened insertion ends, and the insertion end of the first connecting rod assembly and the insertion end of the second connecting rod assembly are arranged opposite to each other;

[0007] The top of the support sleeve is provided with a top ring capable of pushing open the insertion end of the first connecting rod assembly, and the outer wall of the support sleeve is also fixedly connected with a retaining ring capable of pushing open the insertion end of the second connecting rod assembly;

[0008] A rope ring is provided on the outer wall of the support sleeve, and a rubber rope is provided at the insertion end of the second connecting rod assembly. One end of the rubber rope is connected to the insertion end of the second connecting rod assembly, and the other end thereof passes through the rope ring and extends outside the anchor hole. The rubber rope is tightened to close the insertion end of the second connecting rod assembly, and is loosened to open the insertion end of the second connecting rod assembly.

[0009] The outer wall of the support sleeve is also threadedly connected with a threaded sleeve, and the threaded sleeve can rotate along the bottom end of the support sleeve to push the second connecting rod assembly to slide up along the outer wall of the support sleeve.

[0010] At present, the monitoring device for monitoring rock burst in a mine must be able to be fixed in an anchor hole for a long time and operate stably and continuously to perform monitoring tasks efficiently. By monitoring and warning rock burst, it can provide early warning support to relevant personnel before the rock burst occurs, notify the personnel in the mine to evacuate the mine in advance, and prevent safety accidents caused by rock burst that result in casualties. The existing rock burst rod-type monitoring device generally has support parts set outside the anchor hole, and there are no support parts inside the anchor hole. Anchor nails are inserted into the surrounding rock outside the anchor hole to provide support for the rod-type monitoring device. However, the structure of this support part is simple and single, and the force is too concentrated. When coal miners accidentally touch the rock burst monitoring device during construction in a coal mine tunnel, or when the surrounding rock undergoes geological changes and produces an impact, the rod-type monitoring device may become loose, resulting in the monitoring head being unable to make close contact with the surrounding rock, resulting in a decrease in monitoring accuracy. It may even cause the rod-type monitoring device to loosen from the anchor hole and fail to monitor rock burst.

[0011] In response to the above-mentioned shortcomings, the present invention arranges a first connecting rod assembly and a second connecting rod assembly on the rod-type monitoring device; the insertion ends of the first connecting rod assembly and the second connecting rod assembly face relative to each other. When in use, the first connecting rod assembly and the second connecting rod assembly are both extended into the anchor hole channel, and the insertion end of the first connecting rod assembly is supported and inserted into the surrounding rock through the top ring to form a first support layer. The insertion end of the second connecting rod assembly is supported and inserted into the surrounding rock through the retaining ring to form a second support layer. When the insertion ends of the two are completely inserted into the soil of the anchor hole, the first connecting rod assembly can effectively resist the soil above the anchor hole due to impact ground pressure or external load, and the second connecting rod assembly can effectively withstand and disperse the rock and soil pressure from above the surrounding rock. The support matrix formed by the two can not only reduce and resist the disturbance caused by soil deformation to the rod-type monitoring device, but also resist the disturbance caused by workers in the coal mine tunnel accidentally touching the impact ground pressure monitoring device during construction, so that the impact ground pressure monitoring device is stably fixed in the anchor hole, ensuring the accuracy, stability and continuity of monitoring impact ground pressure.

[0012] Furthermore, the first connecting rod assembly includes a threaded tube, a first multi-link assembly and a self-locking nut, the self-locking nut is fastened to the top surface of the threaded tube, and the first multi-link assembly is hinged to the outer wall of the threaded tube.

[0013] Furthermore, there are a plurality of first multi-link assemblies, and the plurality of first multi-link assemblies are circumferentially distributed on the outer wall of the threaded tube with the central axis of the threaded tube as the center line.

[0014] Furthermore, the outer wall of the threaded tube is provided with a first base, and the first base protrudes downward to form a first limiting plate;

[0015] The first multi-link assembly includes a first main link and a first secondary link;

[0016] The first secondary connecting rod is located below the first main connecting rod. One end of the first secondary connecting rod is hinged to the first base, and the other end is hinged to the middle part of the first main connecting rod. One end of the first main connecting rod is hinged to the first base, and the other end is the blade structure insertion end.

[0017] Furthermore, the first multi-link assembly further includes a first spring, one end of the first spring being fixedly connected to the first base, and the other end of the first spring being fixedly connected to the first main link;

[0018] A lateral gap is left between the inserting end of the blade structure and the outer edge of the top ring.

[0019] Furthermore, a slide groove is provided on the support sleeve, one end of the slide groove extends to the retaining ring, and the other end extends to the bottom end of the support sleeve, and a slider is provided on the slide groove;

[0020] The second connecting rod assembly includes a second multi-link assembly and a second base. The second base is fixed on the slider. The second multi-link assembly is hinged on the second base. The second base protrudes upward to form a second limiting plate.

[0021] Furthermore, there are a plurality of second multi-link assemblies, and the number of the plurality of second multi-link assemblies corresponds to the number of the second bases: each second base corresponds to a second multi-link assembly;

[0022] The number of second bases corresponds to the number of chutes: each second base corresponds to one chute;

[0023] The sliding groove is circumferentially distributed on the outer wall of the supporting sleeve with the central axis of the supporting sleeve as the center line.

[0024] Further, the second multi-link assembly includes a second main link, a second spring and a second secondary link;

[0025] One end of the second spring is fixedly connected to the second base, and the other end thereof is fixedly connected to the second main connecting rod;

[0026] The second secondary connecting rod is located above the second main connecting rod, one end of the second secondary connecting rod is hinged to the second base, and the other end is hinged to the middle part of the second main connecting rod. One end of the second main connecting rod is hinged to the second base, and the other end is the blade structure insertion end. A serrated piece with the saw blade facing upward is also provided on the blade structure insertion end of the second main connecting rod.

[0027] Furthermore, the outer wall of the support sleeve is provided with a discontinuous thread that avoids the slide groove. One end of the discontinuous thread extends to the bottom of the retaining ring, and the other end extends to the bottom end of the support sleeve. The support sleeve is threadedly connected to the threaded sleeve through the discontinuous thread.

[0028] Furthermore, the outer wall of the support sleeve is also marked with a scale line, one end of the scale line extends to the bottom of the retaining ring, and the other end extends to the bottom end of the support sleeve.

[0029] In summary, the present invention has the following beneficial effects compared with the prior art:

[0030] The rock burst monitoring device of the present invention is provided with a first connecting rod assembly and a second connecting rod assembly. The support matrix formed by the two can not only reduce and resist the disturbance caused by soil deformation to the rod-type monitoring device, but also resist the disturbance caused by workers in the coal mine tunnel accidentally touching the rock burst monitoring device during construction, so that the rock burst monitoring device is stably fixed in the anchor hole, ensuring the accuracy, stability and continuity of rock burst monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the accompanying drawings:

[0032] Figure 1 This is a schematic diagram of the first connecting rod assembly and the second connecting rod assembly of the rock burst monitoring device when they are not fully opened;

[0033] Figure 2 This is a schematic diagram of the rock burst monitoring device when the first connecting rod assembly and the second connecting rod assembly are fully extended;

[0034] Figure 3 Schematic diagram of the first connecting rod assembly of the rock burst monitoring device;

[0035] Figure 4 This is a schematic diagram of the insertion end of the second connecting rod assembly of the rock burst monitoring device in an incompletely opened state, the slide groove, and the slider;

[0036] Figure 5 This is a schematic diagram of the insertion end of the second connecting rod assembly of the rock burst monitoring device in a fully opened state, the slide groove and the slider;

[0037] Figure 6 This is a schematic diagram of the unfinished support installation of the rock burst monitoring device;

[0038] Figure 7 Schematic diagram of the completed support installation for this rock burst monitoring device.

[0039] The names corresponding to the reference numerals are:

[0040] 1-rod-type monitoring device; 2-first connecting rod assembly; 3-support sleeve; 4-second connecting rod assembly; 5-top ring; 6-blocking ring; 7-rope ring; 8-rubber rope; 9-threaded sleeve; 10-vibration sensor; 11-wire; 201-threaded tube; 202-first main connecting rod; 203-first secondary connecting rod; 204-first spring; 205-self-locking nut; 206-first base; 207-first limit plate; 301-slide; 302-slider; 401-second main connecting rod; 402-second secondary connecting rod; 403-second base; 404-second limit plate; 405-serrated piece; 406-second spring. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The schematic implementation methods of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 should not be understood as a limitation on the present invention.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0044] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0045] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0046] In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of the disclosure of this utility model.

[0047] In the following description, suffixes such as "module", "component", "assembly" or "unit" are used only to facilitate the description of the present invention and have no specific meaning. Therefore, they can be used interchangeably.

[0048] The present invention will be further described in detail below through specific implementations in conjunction with the accompanying drawings.

[0049] According to one embodiment of the present invention, Figures 1 to 7 As shown, a monitoring device for rock burst in a coal mine tunnel includes a rod-type monitoring device 1 for being placed in an anchor hole to monitor soil rock burst. The rod-type monitoring device 1 is threadedly connected to a first connecting rod assembly 2 and a support sleeve 3 in sequence from top to bottom. The support sleeve 3 is also slidably connected to a second connecting rod assembly 4.

[0050] The first connecting rod assembly 2 and the second connecting rod assembly 4 are both provided with freely opened insertion ends, and the insertion end of the first connecting rod assembly 2 and the insertion end of the second connecting rod assembly 4 are arranged opposite to each other;

[0051] The top of the support sleeve 3 is provided with a top ring 5 that can push open the insertion end of the first connecting rod assembly 2, and the outer wall of the support sleeve 3 is also fixedly connected with a retaining ring 6 that can push open the insertion end of the second connecting rod assembly 4;

[0052] The outer wall of the support sleeve 3 is provided with a rope ring 7, and the insertion end of the second connecting rod assembly 4 is provided with a rubber rope 8. One end of the rubber rope 8 is connected to the insertion end of the second connecting rod assembly 4, and the other end thereof passes through the rope ring 7 and extends outside the anchor hole. The rubber rope 8 is tightened to close the insertion end of the second connecting rod assembly 4, and is loosened to open the insertion end of the second connecting rod assembly 4.

[0053] The outer wall of the support sleeve 3 is also threadedly connected to a threaded sleeve 9 , and the threaded sleeve 9 can rotate along the bottom end of the support sleeve 3 to push the second connecting rod assembly 4 to slide up along the outer wall of the support sleeve 3 .

[0054] In this embodiment, the first link assembly 2 is in a closed state under the restriction of the anchor hole. When the first multi-link assembly reaches the predetermined position of the anchor hole, the support sleeve 3 is rotated to make the top ring 5 move upward and gradually approach the first link assembly 2. When the top ring 5 contacts the first link assembly 2, the support sleeve 3 is continued to be rotated to make the top ring 5 move upward and squeeze the first link assembly 2 open, and then cooperate with the tensile stress to make the insertion end of the first multi-link assembly insert into the soil of the anchor hole to form the first layer of support; in addition, a second multi-link assembly is provided between the retaining ring 6 and the threaded sleeve 9, and the second multi-link assembly is pushed upward by rotating the threaded sleeve 9. The second multi-link assembly is in a closed state under the action of the tightened rubber rope 8, waiting to be moved to the predetermined position. When the position is fixed, the rubber rope 8 bound to the insertion end of the second multi-link assembly is loosened or disconnected, so that the second multi-link assembly is unfolded, and the threaded sleeve 9 is continued to be rotated to push the second multi-link assembly to squeeze the retaining ring 6. The retaining ring 6 squeezes and pushes open the second multi-link assembly, so that the insertion end of the second multi-link assembly is inserted into the soil of the anchor hole to form a second layer of support; the support force matrix formed by the first multi-link assembly and the second multi-link assembly can not only reduce and resist the disturbance caused by soil deformation to the rod-type monitoring device, but also resist the disturbance caused by workers in the coal mine tunnel accidentally touching the impact ground pressure monitoring device during construction, so that the impact ground pressure monitoring device is stably fixed in the anchor hole, ensuring the accuracy, stability and continuity of monitoring the impact ground pressure.

[0055] Furthermore, the first connecting rod assembly 2 includes a threaded tube 201 , a first multi-link assembly and a self-locking nut 205 . The self-locking nut 205 is fastened to the top surface of the threaded tube 201 , and the first multi-link assembly is hinged to the outer wall of the threaded tube 201 .

[0056] When this embodiment is implemented, the self-locking nut 205 is connected to the threaded hole of the threaded tube 201. After the first multi-link assembly is driven to a predetermined position by rotating the threaded tube 201 threadedly connected to the rod-type monitoring device, the self-locking nut 205 is fastened to the top surface of the threaded tube 201 to prevent the threaded tube 201 from moving upward.

[0057] Furthermore, there are a plurality of the first multi-link assemblies, and the plurality of the first multi-link assemblies are circumferentially distributed on the outer wall of the threaded tube 201 with the central axis of the threaded tube 201 as the center line.

[0058] When this embodiment is implemented, the number of first multi-link assemblies is preferably three, and the three first multi-link assemblies are evenly distributed on the outer wall of the threaded tube 201 to form a supporting umbrella frame, which can disperse the load in the surrounding rock, reduce the pressure borne by a single first multi-link assembly, and enhance the bearing capacity and firmness of the entire device.

[0059] Furthermore, the outer wall of the threaded tube 201 is provided with a first base 206, and the first base 206 protrudes downward to form a first limiting plate 207;

[0060] The first multi-link assembly includes a first main link 202 and a first secondary link 203;

[0061] The first secondary connecting rod 203 is located below the first main connecting rod 202. One end of the first secondary connecting rod 203 is hinged to the first base 206, and the other end is hinged to the middle part of the first main connecting rod 202. One end of the first main connecting rod 202 is hinged to the first base 206, and the other end is the blade structure insertion end.

[0062] In this embodiment, the insertion end of the blade structure is the freely unfolded free end of the first main connecting rod 202, and the end of the free end is designed to be in the shape of a blade. The blade-shaped end makes the insertion end have stronger puncture and cutting capabilities, and can be inserted into the soil of the anchor hole more smoothly.

[0063] When this embodiment is implemented, during the unfolding of the first main link 202, the first secondary link 203 acts as a hinge component between the first main link 202 and the first base 206, providing support force during the unfolding of the first main link 202, so that the first main link 202 can unfold more smoothly; the first limit plate 207 is arranged on the outside of the rotation trajectory of the first main link 202. When the first main link 202 rotates outward to a suitable position, the first limit plate 207 blocks the first main link 202, and the first secondary link 203 tightens the first main link 202. The first limit plate 207 and the first secondary link 203 act as limit components to limit excessive rotation of the first main link 202, preventing the first main link 202 from excessive rotation and failing to provide support.

[0064] Furthermore, the first multi-link assembly further includes a first spring 204, one end of the first spring 204 is fixedly connected to the first base 206, and the other end thereof is fixedly connected to the first main link 202;

[0065] A lateral gap is left between the insertion end of the blade structure and the outer edge of the top ring 5 .

[0066] When this embodiment is implemented, the first spring 204 is located between the first main connecting rod 202 and the first base 206, providing a certain elastic force to prevent the first main connecting rod 202 from being completely closed on the rod-type monitoring device, so that a lateral gap is left between the insertion end of the first main connecting rod 202 and the outer edge of the top ring 5. The existence of the lateral gap ensures that during the upward movement of the top ring 5, the end of the insertion end will not directly contact the annular surface of the top ring 5, and will not cause obstruction to the upward movement of the top ring 5. This facilitates the top ring 5 to move smoothly to contact the first secondary connecting rod 203 when moving upward, and the insertion end of the first main connecting rod 202 is inserted into the soil by squeezing the first secondary connecting rod 203.

[0067] Furthermore, a slide groove 301 is provided on the support sleeve 3, one end of the slide groove 301 extends to the retaining ring 6, and the other end extends to the bottom end of the support sleeve 3, and a slider 302 is provided on the slide groove 301;

[0068] The second connecting rod assembly 4 includes a second multi-link assembly and a second base 403 . The second base 403 is fixed on the slider 302 . The second multi-link assembly is hinged on the second base 403 . The second base 403 protrudes upward to form a second limiting plate 404 .

[0069] When this embodiment is implemented, the second base 403 is connected to the slider 302 in the slide groove 301, and the second connecting rod assembly is hinged on the second base 403. This design enables the second multi-link assembly on the second base 403 to squeeze the retaining ring 6 when the second base 403 moves upward, so as to facilitate the expansion of the second multi-link assembly. The second limit plate 404 is arranged on the outside of the rotation trajectory of the second multi-link assembly. When the second multi-link assembly rotates outward to a suitable position, the second limit plate 404 blocks the second multi-link assembly to prevent the second multi-link assembly from excessively rotating and failing to provide support.

[0070] Furthermore, there are a plurality of second multi-link assemblies, and the number of the second multi-link assemblies corresponds to the number of the second bases 403: each second base 403 corresponds to one second multi-link assembly;

[0071] The number of the second bases 403 corresponds to the number of the chutes 301 : each second base 403 corresponds to one chute 301 ;

[0072] The sliding grooves 301 are circumferentially distributed on the outer wall of the support sleeve 3 with the central axis of the support sleeve 3 as the center line.

[0073] In this embodiment, each second base 403 corresponds to a slide groove 301 and a second multi-link assembly. The advantage of this design is that when each second base 403 slides to a suitable position through the slide groove 301, a corresponding second multi-link assembly opens to a suitable position and is inserted into the soil of the anchor hole, providing support for the rod-type monitoring device 1.

[0074] When this embodiment is implemented, the number of second multi-link assemblies is preferably three, and the three second multi-link assemblies are evenly distributed on the outer wall of the support sleeve to form a supporting umbrella frame, which can disperse the load in the surrounding rock, reduce the pressure borne by a single second multi-link assembly, and enhance the load-bearing capacity and firmness of the entire device.

[0075] Furthermore, the second multi-link assembly includes a second main link 401 , a second spring 406 and a second secondary link 402 ;

[0076] One end of the second spring 406 is fixedly connected to the second base 403, and the other end thereof is fixedly connected to the second main connecting rod 401;

[0077] The second secondary connecting rod 402 is located above the second main connecting rod 401, one end of the second secondary connecting rod 402 is hinged to the second base 403, and the other end is hinged to the middle part of the second main connecting rod 401, one end of the second main connecting rod 401 is hinged to the second base 403, and the other end is the blade structure insertion end, and a serrated piece 405 with the saw blade facing upward is also provided on the blade structure insertion end of the second main connecting rod 401.

[0078] When this embodiment is implemented, the second spring 406 is located between the second main connecting rod 401 and the second base 403, providing a certain elastic force to prevent the second main connecting rod 401 from being completely closed on the supporting sleeve 3, so that a lateral gap is left between the insertion end of the second main connecting rod 401 and the outer edge of the retaining ring 6. The existence of the lateral gap prevents the end of the insertion end of the second main connecting rod 401 from directly contacting the annular surface of the retaining ring 6 during the upward movement of the second main connecting rod 401, and will not cause obstruction when the second main connecting rod 401 moves upward. At the same time, the existence of the second spring 406 ensures that when the rubber rope 8 is loosened or disconnected, the second main connecting rod 401 is opened and contacts the soil in the anchor hole through the elastic force of the second spring 406. When the second base 403 slides until the second secondary connecting rod 402 contacts the retaining ring 6, the threaded sleeve 9 continues to be rotated so that the retaining ring 6 squeezes the second secondary connecting rod 402. By squeezing the second secondary connecting rod 402, the insertion end of the second main connecting rod 401 is inserted into the soil to form a second support layer.

[0079] In this embodiment, the insertion end of the blade structure is the free end of the second main connecting rod 401 that is freely extended. The end of the free end is designed to be in the shape of a blade. The blade-shaped end makes the insertion end have stronger puncture and cutting capabilities, and can be inserted into the soil of the anchor hole more smoothly; a serrated piece 405 is provided at the blade and the back of the blade of the insertion end. The serrated piece 405 has an arc serrated piece with the tooth edge facing upward. The design of the arc serrated piece can prevent the serrated piece 405 from being stuck on the retaining ring 6 when in contact with the retaining ring 6, so that the serrated piece 405 can be smoothly inserted into the soil. After the insertion end is fully inserted into the soil, the tooth back of the serrated piece 405 can hook the soil layer, so that the second multi-link assembly can provide a more solid support effect.

[0080] When this embodiment is implemented, the rubber rope 8 is tied to the insertion end of the second main connecting rod 401. When the rubber rope 8 is tightened, the second main connecting rod 401 is closed on the supporting sleeve 3. When the rubber rope 8 is loosened, the second main connecting rod 401 is unfolded along the outer wall of the supporting sleeve. During the unfolding of the second main connecting rod 401, the second secondary connecting rod 402 is squeezed with the retaining ring 6 to provide support force for the unfolding of the second main connecting rod 401; secondly, when the second main connecting rod 401 is fully unfolded, the second secondary connecting rod 402 acts as another limiting component to limit the excessive rotation of the second main connecting rod 402, thereby preventing the second main connecting rod 401 from excessive rotation and failing to provide support.

[0081] Furthermore, the outer wall of the support sleeve 3 is provided with an intermittent thread that avoids the slide groove 301, one end of the intermittent thread extends to the bottom of the retaining ring 6, and the other end extends to the bottom end of the support sleeve 3, and the support sleeve 3 is threadedly connected to the threaded sleeve 9 through the intermittent thread.

[0082] In this embodiment, in order to allow the first base 402 to slide on the slide groove 301, the disconnected part of the intermittent thread is the groove surface of the slide groove 301. By rotating the threaded sleeve 9 threadedly connected to the support sleeve 3, the threaded sleeve 9 pushes the second multi-link assembly to move upward and then squeezes the retaining ring 6, so that the insertion end of the second multi-link assembly is fully inserted into the soil of the anchor hole. The retaining ring 6 and the threaded sleeve 9 form a second layer of locking device for preventing the second multi-link assembly from moving up and down in the rod-type monitoring device, so that the second multi-link assembly can fully form a supporting function.

[0083] Furthermore, the outer wall of the support sleeve 3 is also marked with a scale line, one end of the scale line extends to the bottom of the retaining ring 6, and the other end extends to the bottom end of the support sleeve 3.

[0084] When this embodiment is implemented, it is determined by observing the scale whether the second multi-link assembly has moved to the preset position, and then it is determined whether the rubber rope 8 should be released.

[0085] This embodiment can be operated in the following manner:

[0086] like Figure 1 、 Figure 6 and Figure 7 As shown, the utility model provides a monitoring device for rock burst in coal mine tunnels, wherein a first connecting rod assembly 2 and a second connecting rod assembly 4 are provided on a rod-type monitoring device 1 of the rock burst monitoring device. When the rod-type monitoring device has not reached the predetermined position of the anchor hole, the multi-link anchor hole channel of the first connecting rod assembly 2 is restricted by the multi-link anchor hole channel and the multi-link of the second connecting rod assembly 4 is restricted by the tightened rubber rope 8. When the rod-type monitoring device 1 reaches the predetermined position of the anchor hole, the support sleeve 3 provided on the rod-type monitoring device 1 is rotated so that the top ring 5 on the top of the support sleeve 3 opens the multi-link of the first connecting rod assembly 2 and penetrates into the soil of the anchor hole channel, and the insertion end of the multi-link is fully inserted into the soil to form a first support layer in accordance with the tensile stress; when the first support layer is completely formed After completion, the threaded sleeve 9 set on the support sleeve 3 is rotated to push the second connecting rod assembly 4 to slide upward along the outer wall of the support sleeve 3. By observing the scale line on the outer wall of the support sleeve 3, when the threaded sleeve 9 is rotated to the predetermined position, the multi-link of the second connecting rod assembly 4 is in contact with the retaining ring on the support sleeve 3. At this time, the rubber rope 8 is loosened and the threaded sleeve 9 is continued to be rotated. Under the extrusion of the retaining ring 6, the insertion end of the second connecting rod assembly 4 is fully inserted into the soil to form a second support layer; the rod head of the rod-type monitoring device 1 is in close contact with the soil of the anchor hole, and a vibration sensor 10 is built into the rod head. The vibration sensor 10 is electrically connected to one end of the wire 11 in the rod-type monitoring device 1, and the other end of the wire 11 passes through the rod tail of the rod-type monitoring device 1 and is connected to the external early warning display device to continuously monitor the impact ground pressure in the tunnel.

[0087] The insertion ends of the first connecting rod assembly 2 and the second connecting rod assembly 4 are facing relative to each other. When the two are fully inserted into the soil of the anchor hole, the first connecting rod assembly 2 can effectively resist the disturbance of the soil above the anchor hole to the rod-type monitoring device 1 due to impact ground pressure or external load. The existence of the second connecting rod assembly 4 can effectively withstand and disperse the geotechnical pressure from above the surrounding rock. The support matrix formed by the two can not only reduce and resist the disturbance caused by soil deformation, but also resist the disturbance caused by workers in the coal mine tunnel accidentally touching the impact ground pressure monitoring device during construction, so that the impact ground pressure monitoring device is stably fixed in the anchor hole, ensuring the accuracy, stability and continuity of monitoring the impact ground pressure.

[0088] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific implementation method of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A monitoring device for rock burst in coal mine tunnels, characterized in that: The invention comprises a rod-type monitoring device (1) for being placed in an anchor hole to monitor soil impact ground pressure, wherein the rod-type monitoring device (1) is threadedly connected to a first connecting rod assembly (2) and a supporting sleeve (3) in sequence from top to bottom, and a second connecting rod assembly (4) is also slidably connected to the supporting sleeve (3); The first connecting rod assembly (2) and the second connecting rod assembly (4) are both provided with freely opened insertion ends, and the insertion end of the first connecting rod assembly (2) and the insertion end of the second connecting rod assembly (4) are arranged opposite to each other; The top end of the support sleeve (3) is provided with a top ring (5) capable of pushing open the insertion end of the first connecting rod assembly (2), and the outer wall of the support sleeve (3) is also fixedly connected with a retaining ring (6) capable of pushing open the insertion end of the second connecting rod assembly (4); The outer wall of the support sleeve (3) is provided with a rope ring (7), and the insertion end of the second connecting rod assembly (4) is provided with a rubber rope (8), one end of the rubber rope (8) is connected to the insertion end of the second connecting rod assembly (4), and the other end thereof passes through the rope ring (7) and extends outside the anchor hole. The rubber rope (8) is tightened to close the insertion end of the second connecting rod assembly (4), and the rubber rope (8) is loosened to open the insertion end of the second connecting rod assembly (4); The outer wall of the support sleeve (3) is also threadedly connected to a threaded sleeve (9), and the threaded sleeve (9) can rotate along the bottom end of the support sleeve (3) to push the second connecting rod assembly (4) to slide up along the outer wall of the support sleeve (3).

2. The device for monitoring rock burst in a coal mine tunnel according to claim 1, characterized in that: The first connecting rod assembly (2) comprises a threaded tube (201), a first multi-link assembly and a self-locking nut (205), wherein the self-locking nut (205) is fastened to the top surface of the threaded tube (201), and the first multi-link assembly is hinged to the outer wall of the threaded tube (201).

3. The device for monitoring rock burst in a coal mine tunnel according to claim 2, characterized in that: There are a plurality of the first multi-link assemblies, and the plurality of the first multi-link assemblies are circumferentially distributed on the outer wall of the threaded tube (201) with the central axis of the threaded tube (201) as the center line.

4. The device for monitoring rock burst in a coal mine tunnel according to claim 3, characterized in that: The outer wall of the threaded tube (201) is provided with a first base (206), and the first base (206) is protruded downward to form a first limiting plate (207); The first multi-link assembly includes a first main link (202) and a first secondary link (203); The first secondary connecting rod (203) is located below the first main connecting rod (202), one end of the first secondary connecting rod (203) is hinged to the first base (206), and the other end is hinged to the middle part of the first main connecting rod (202), one end of the first main connecting rod (202) is hinged to the first base (206), and the other end is the blade structure insertion end.

5. The device for monitoring rock burst in a coal mine tunnel according to claim 4, characterized in that: The first multi-link assembly further includes a first spring (204), one end of the first spring (204) is fixedly connected to the first base (206), and the other end of the first spring (204) is fixedly connected to the first main link (202); A lateral gap is left between the insertion end of the blade structure and the outer edge of the top ring (5).

6. The device for monitoring rock burst in a coal mine tunnel according to claim 1, characterized in that: A sliding groove (301) is also provided on the support sleeve (3), one end of the sliding groove (301) extends to the retaining ring (6), and the other end extends to the bottom end of the support sleeve (3), and a sliding block (302) is provided on the sliding groove (301); The second connecting rod assembly (4) comprises a second multi-link assembly and a second base (403), wherein the second base (403) is fixed on the slider (302), the second multi-link assembly is hinged on the second base (403), and the second base (403) protrudes upward to form a second limiting plate (404).

7. The device for monitoring rock burst in a coal mine tunnel according to claim 6, characterized in that: There are a plurality of second multi-link assemblies, and the number of the second multi-link assemblies corresponds to the number of the second bases (403): each second base (403) corresponds to one second multi-link assembly; The number of the second bases (403) corresponds to the number of the chutes (301): each of the second bases (403) corresponds to one chute (301); The sliding groove (301) is circumferentially distributed on the outer wall of the supporting sleeve (3) with the central axis of the supporting sleeve (3) as the center line.

8. The device for monitoring rock burst in a coal mine tunnel according to claim 7, characterized in that: The second multi-link assembly includes a second main link (401), a second spring (406) and a second secondary link (402); One end of the second spring (406) is fixedly connected to the second base (403), and the other end thereof is fixedly connected to the second main connecting rod (401); The second secondary connecting rod (402) is located above the second main connecting rod (401), one end of the second secondary connecting rod (402) is hinged to the second base (403), and the other end is hinged to the middle part of the second main connecting rod (401), one end of the second main connecting rod (401) is hinged to the second base (403), and the other end is the blade structure insertion end, and a sawtooth piece (405) with a saw blade facing upward is also provided on the blade structure insertion end of the second main connecting rod (401).

9. The device for monitoring rock burst in a coal mine tunnel according to claim 6, characterized in that: The outer wall of the support sleeve (3) is provided with a discontinuous thread that avoids the slide groove (301), one end of the discontinuous thread extends to the bottom of the retaining ring (6), and the other end of the discontinuous thread extends to the bottom end of the support sleeve (3), and the support sleeve (3) is threadedly connected to the threaded sleeve (9) through the discontinuous thread.

10. The device for monitoring rock burst in a coal mine tunnel according to claim 9, characterized in that: The outer wall of the support sleeve (3) is also marked with a scale line, one end of the scale line extends to the bottom of the retaining ring (6), and the other end of the scale line extends to the bottom end of the support sleeve (3).

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