Anchoring device for rock layer migration monitoring point
By designing an anchoring device for monitoring coal mine rock formation migration, the problems of staggering and slip caused by construction and lithologic changes in traditional anchoring methods are solved, and higher measurement accuracy and anchor reliability are achieved, reducing environmental pollution.
Patent Information
- Application Number
- CN202111446059.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-11-26
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2041-11-26
AI Technical Summary
In traditional monitoring of coal mine rock formation migration, anchor points are staggered and slipped due to construction and lithologic changes, resulting in reduced measurement accuracy or failure of anchoring.
An anchoring device for monitoring points of rock formation migration is designed, including a base plate, a rotating plate, a bracket, a winding assembly, a reciprocating mechanism, a telescopic rod and an adjustment assembly. The drill bit is driven by a servo cylinder to achieve faster anchoring and greater tension.
It effectively avoids slipping and failure of anchors and rock-to-earth bodies, improves the reliability and applicability of anchors, reduces the engineering risks caused by anchor failure, and reduces the pollution of the environment by chemical anchoring.
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Figure CN114320173B_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of rock migration monitoring, and in particular to an anchoring device for a rock migration monitoring point. Background Art
[0002] At present, wire-traction anchor fixed point devices are used in the study of surface subsidence and rock migration in coal mines. The traditional mechanical component is to place the anchor claw into the surface drill hole, and use methods such as pressurization or grouting to increase the friction between the anchor claw component and the surrounding rock of the hole wall to achieve the purpose of synchronous migration of the measuring point and the rock layer.
[0003] The traditional technical solutions have the following defects: In the current coal mine rock movement monitoring work, the traditional anchoring method of components has the problem of anchor point dislocation and slippage caused by construction and rock property changes, which leads to reduced measurement accuracy and even failure of the anchoring effect. Therefore, this needs to be improved. Summary of the invention
[0004] In order to make up for the above shortcomings, the present application provides a rock movement monitoring point anchoring device, which aims to improve the current coal mine rock movement monitoring work. The traditional anchoring method of components has the problem of anchor point dislocation and slippage caused by construction and rock property changes, which leads to reduced measurement accuracy and even failure of the anchoring effect.
[0005] The embodiment of the present application provides an anchoring device for a rock layer migration monitoring point, comprising a base plate, a rotating plate rotatably mounted on the base plate via a bearing, a bracket mounted on the rotating plate, a winding assembly rotatably mounted on the bracket via a bearing, a reciprocating mechanism mounted on one side of the bracket, the winding assembly being transmission-connected to the reciprocating mechanism via a belt, a first guide wheel mounted on the reciprocating mechanism, two symmetrical first articulated seats fixedly mounted on the bracket, a telescopic rod hinged on the first articulated seat, and an adjustment assembly mounted on both the telescopic rod and the bracket;
[0006] A fixed block is installed on the telescopic rod, and a rotating shaft is rotatably installed on the fixed block through a bearing. A second guide wheel is fixedly installed on the rotating shaft. Cables are connected to the winding assembly, the first guide wheel and the second guide wheel. An anchor head is installed at the end of the cable. A support column is installed in the anchor head. A plurality of servo electric cylinders are fixedly installed on the support column, and a drill bit is fixedly installed on the output end of the servo electric cylinder.
[0007] In the above implementation process, the rotating position of the bracket is conveniently adjusted through the rotating plate, the cable is conveniently retracted and released through the winding assembly, the first guide wheel is driven to reciprocate horizontally through the reciprocating mechanism to avoid the cable from being entangled when winding, the extension length of the second guide wheel is conveniently adjusted through the telescopic rod, the height of the second guide wheel is conveniently adjusted through the adjusting assembly, the anchor head is conveniently fixed through the cable, and the drill bit is driven to move through multiple servo electric cylinders installed on the support column, so as to obtain greater pulling force more quickly and save a lot of anchor cost. It can also effectively avoid the problems of slippage and failure between the anchor and the surrounding rock and soil caused by traditional anchoring methods, improve the efficiency of anchor construction work, improve the reliability and applicability of anchors, reduce the risk of engineering due to anchor failure, and cause no pollution to the geological environment and groundwater environment compared with chemical anchoring methods.
[0008] In a specific embodiment, the winding assembly includes a first servo motor and a winding roller, both ends of the winding roller are rotatably mounted on the bracket via bearings, the first servo motor is fixedly mounted on the bracket, the first servo motor is transmission-connected to the winding roller via a coupling, and the belt is mounted on the winding roller.
[0009] In the above implementation process, the first servo motor is used to conveniently drive the winding roller to rotate, so as to facilitate the winding and releasing of the cable.
[0010] In a specific embodiment, the reciprocating mechanism includes a reciprocating screw, a guide rod, a pulley and a movable slider, both ends of the reciprocating screw are rotatably mounted on the bracket through bearings, both ends of the guide rod are fixed on the bracket, the pulley is fixedly mounted on the input end of the reciprocating screw, the movable slider is threadedly connected to the reciprocating screw and slidably mounted on the guide rod, and the pulley is connected to the belt.
[0011] In the above implementation process, the belt drives the pulley to rotate, thereby driving the reciprocating screw rod to operate, so as to facilitate the reciprocating movement of the movable slider on the guide rod.
[0012] In a specific embodiment, the telescopic rod includes a first adjusting rod, a second adjusting rod and a locking screw, one end of the first adjusting rod is hinged on the first hinge seat, the second adjusting rod is slidably installed in the first adjusting rod, and the first adjusting rod is connected to the second adjusting rod through the locking screw.
[0013] In the above implementation process, the telescopic position of the second adjusting rod is conveniently adjusted by the first adjusting rod, and the second adjusting rod is conveniently locked in the first adjusting rod by the locking screw.
[0014] In a specific embodiment, the adjustment assembly includes two second articulated seats and an electric push rod, the two second articulated seats are fixedly mounted on the first adjustment rod and the bracket respectively, and the two ends of the electric push rod are hinged on the two second articulated seats.
[0015] In the above implementation process, the output length of the telescopic shaft is conveniently adjusted through the electric push rods installed on the two second hinged seats, thereby adjusting the height position of the second guide wheel.
[0016] In a specific embodiment, a plurality of insertion holes are provided on the circumferential surface of the anchor head, cleaning blocks are installed in the plurality of insertion holes, and the drill bit is inserted into the cleaning blocks.
[0017] In the above implementation process, impurities on the drill bit can be cleaned conveniently by the cleaning block installed in the socket.
[0018] In a specific implementation manner, a plurality of equidistant threaded columns are fixedly mounted on the lower surface of the base plate, a threaded rod is internally threadedly connected to the threaded column, and a support block is rotatably mounted on the threaded rod via a bearing.
[0019] In the above implementation process, the vertical position of the support block is conveniently adjusted by rotating the threaded column.
[0020] In a specific embodiment, a plurality of positioning pins are fixedly mounted on the lower surface of the support block, and a hand wheel is fixedly mounted on the upper end of the threaded rod.
[0021] In the above implementation process, the anti-slip effect of the support block is improved by using a plurality of positioning nails, and the installed hand wheel facilitates the rotation of the threaded rod.
[0022] In a specific embodiment, a first gear is fixedly mounted on the lower surface of the rotating plate.
[0023] In the above implementation process, the first gear is used to drive the rotating plate to rotate.
[0024] In a specific implementation, a second servo motor is installed on the lower surface of the bottom plate, a second gear is fixedly installed on the output end of the second servo motor, and the second gear is meshed with the first gear.
[0025] In the above implementation process, the output end of the second servo motor drives the second gear to rotate, thereby driving the first gear meshing with the second gear to rotate.
[0026] In the rock stratum movement monitoring point anchoring device, the rotating position of the bracket is conveniently adjusted through the rotating plate, the cable is conveniently retracted and released through the winding assembly, the first guide wheel is driven to reciprocate horizontally through the reciprocating mechanism to avoid the cable from being entangled when winding, the extension length of the second guide wheel is conveniently adjusted through the telescopic rod, the angle of the second guide wheel is conveniently adjusted through the adjusting assembly, the anchor head is conveniently fixed through the cable, and the drill bit is driven to move through multiple servo electric cylinders installed on the support column, so as to obtain greater pulling force more quickly, save a lot of anchor cost, and effectively avoid the problems of slippage and failure of the anchor and the surrounding rock and soil caused by the traditional anchoring method, thereby improving the efficiency of the anchor construction work, improving the reliability and applicability of the anchor, reducing the risk of engineering due to anchor failure, and causing no pollution to the geological environment and groundwater environment compared with the chemical anchoring method. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0028] Figure 1 It is one of the structural schematic diagrams provided in the implementation mode of this application;
[0029] Figure 2 This is the second structural diagram provided by the implementation method of this application;
[0030] Figure 3 This is the third structural diagram provided by the implementation method of this application;
[0031] Figure 4 for Figure 3 A partial enlarged view of point A in the middle.
[0032] In the figure: 1, bottom plate; 2, rotating plate; 3, bracket; 4, winding assembly; 41, first servo motor; 42, winding roller; 5, reciprocating mechanism; 51, reciprocating screw rod; 52, guide rod; 53, pulley; 54, moving slider; 6, first guide wheel; 7, first hinge seat; 8, telescopic rod; 81, first adjusting rod; 82, second adjusting rod; 83, locking screw; 9, adjusting assembly; 91, second hinge seat; 92, electric push rod; 10, fixing block; 11, rotating shaft; 12, second guide wheel; 13, cable; 14, anchor head; 15, support column; 16, servo electric cylinder; 17, drill bit; 18, belt; 19, jack; 20, cleaning block; 21, threaded column; 22, threaded rod; 23, support block; 24, positioning nail; 25, hand wheel; 26, first gear; 27, second servo motor; 28, second gear. DETAILED DESCRIPTION
[0033] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.
[0034] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0035] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0037] In the description of the present application, 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 indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element 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 application.
[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0039] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0040] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0041] See also Figure 1-4The embodiment of the present application provides an anchoring device for a rock formation migration monitoring point, including a base plate 1, a rotating plate 2 is rotatably mounted on the base plate 1 through a bearing, a bracket 3 is mounted on the rotating plate 2, a winding assembly 4 is rotatably mounted on the bracket 3 through a bearing, the winding assembly 4 includes a first servo motor 41 and a winding roller 42, both ends of the winding roller 42 are rotatably mounted on the bracket 3 through bearings, the first servo motor 41 is fixedly mounted on the bracket 3, the first servo motor 41 is transmission-connected to the winding roller 42 through a coupling, a belt 18 is sleeved on the winding roller 42, and the winding roller 42 is conveniently driven to rotate by the first servo motor 41, so as to facilitate the retraction and release of the cable 13, and a reciprocating mechanism 5 is mounted on one side of the bracket 3, which is used to rotate the winding roller 42. The reciprocating mechanism 5 includes a reciprocating screw rod 51, a guide rod 52, a pulley 53 and a moving slider 54. Both ends of the reciprocating screw rod 51 are rotatably mounted on the bracket 3 through bearings, both ends of the guide rod 52 are fixed on the bracket 3, the pulley 53 is fixedly mounted on the input end of the reciprocating screw rod 51, the moving slider 54 is threadedly connected to the reciprocating screw rod 51, and is slidably mounted on the guide rod 52. The pulley 53 is connected to the belt 18, and the belt 18 drives the pulley 53 to rotate, thereby driving the reciprocating screw rod 51 to operate, so as to facilitate the reciprocating movement of the moving slider 54 on the guide rod 52. The winding assembly 4 is connected to the reciprocating mechanism 5 through the belt 18. The first guide wheel 6 is installed on the reciprocating mechanism 5, and the bracket 3 is fixed. Two symmetrical first hinge seats 7 are installed, and a telescopic rod 8 is hinged on the first hinge seat 7. The telescopic rod 8 includes a first adjusting rod 81, a second adjusting rod 82 and a locking screw 83. One end of the first adjusting rod 81 is hinged on the first hinge seat 7, and the second adjusting rod 82 is slidably installed in the first adjusting rod 81. The first adjusting rod 81 is connected to the second adjusting rod 82 by a locking screw 83. The telescopic position of the second adjusting rod 82 is conveniently adjusted by the first adjusting rod 81, and the locking screw 83 is conducive to locking the second adjusting rod 82 in the first adjusting rod 81. Adjustment components 9 are installed on the telescopic rod 8 and the bracket 3. The adjustment component 9 includes two second hinge seats 91 and an electric push rod 92 The two second hinged seats 91 are fixedly mounted on the first adjusting rod 81 and the bracket 3 respectively, and the two ends of the electric push rod 92 are hinged on the two second hinged seats 91. The electric push rod 92 installed on the two second hinged seats 91 is convenient for adjusting the output length of the telescopic shaft, thereby adjusting the height position of the second guide wheel 12. The rotating plate 2 is convenient for adjusting the rotation position of the bracket 3. The winding assembly 4 is convenient for winding and releasing the cable 13. The reciprocating mechanism 5 drives the first guide wheel 6 to reciprocate horizontally to avoid the cable 13 from being entangled when winding. The extension length of the second guide wheel 12 is convenient for adjusting the extension length of the second guide wheel 12 through the telescopic rod 8, and the height of the second guide wheel 12 is convenient for adjusting the height of the second guide wheel 12 through the adjusting assembly 9;
[0042] A fixed block 10 is installed on the telescopic rod 8, and a rotating shaft 11 is rotatably installed on the fixed block 10 through a bearing. A second guide wheel 12 is fixedly installed on the rotating shaft 11. A cable 13 is connected to the winding component 4, the first guide wheel 6 and the second guide wheel 12. An anchor head 14 is installed at the end of the cable 13. A support column 15 is installed in the anchor head 14. A plurality of servo electric cylinders 16 are fixedly installed on the support column 15. A drill bit 17 is fixedly installed on the output end of the servo electric cylinder 16. The cable 13 facilitates the fixing of the anchor head 14, and the drill bit 17 is driven to move by the plurality of servo electric cylinders 16 installed on the support column 15, so as to obtain a greater pulling force more quickly, save a lot of anchor cost, and effectively avoid the problems of slippage and failure of the anchor and the surrounding rock and soil caused by the traditional anchoring method, thereby improving the efficiency of the anchor construction work, improving the reliability and applicability of the anchor, reducing the risk of engineering caused by anchor failure, and causing no pollution to the geological environment and groundwater environment compared with the chemical anchoring method.
[0043] In a specific implementation scheme, a plurality of sockets 19 are provided on the circumferential surface of the anchor head 14, cleaning blocks 20 are installed in the plurality of sockets 19, and the drill bit 17 is inserted into the cleaning blocks 20, so that impurities on the drill bit 17 can be cleaned conveniently through the cleaning blocks 20 installed in the sockets 19.
[0044] In this embodiment, a plurality of equidistant threaded columns 21 are fixedly mounted on the lower surface of the base plate 1, a threaded rod 22 is connected to the inner thread of the threaded column 21, a support block 23 is rotatably mounted on the threaded rod 22 via a bearing, and the vertical position of the support block 23 can be conveniently adjusted by rotating the threaded column 21.
[0045] In the present application, a plurality of positioning pins 24 are fixedly installed on the lower surface of the support block 23, and a handwheel 25 is fixedly installed on the upper end of the threaded rod 22. The plurality of positioning pins 24 improves the anti-slip effect of the support block 23, and the installed handwheel 25 facilitates the rotation of the threaded rod 22.
[0046] In a specific configuration, a first gear 26 is fixedly mounted on the lower surface of the rotating plate 2 , and the first gear 26 is used to drive the rotating plate 2 to rotate.
[0047] In a specific implementation scheme, a second servo motor 27 is installed on the lower surface of the base plate 1, and a second gear 28 is fixedly installed on the output end of the second servo motor 27. The second gear 28 is meshed with the first gear 26. The output end of the second servo motor 27 drives the second gear 28 to rotate, thereby driving the first gear 26 meshed with the second gear 28 to rotate.
[0048] The working principle of the rock stratum movement monitoring point anchoring device is as follows: when in use, the anchor head 14 is installed on the cable 13, and according to the position of the movement measurement point of the stratum, the rotation position of the bracket 3 is adjusted by the rotating plate 2, and the extension length of the second guide wheel 12 is adjusted by the telescopic rod 8. The cable 13 wound on the winding assembly 4 is passed through the first guide wheel 6 and the second guide wheel 12 respectively, and the cable 13 drives the anchor head 14 to move downward into the movement measurement point through the winding assembly 4. When it moves to the monitoring height, a plurality of servo electric cylinders 16 are started, and the drill bit 17 installed on the output end of the servo electric cylinder 16 drills in a direction perpendicular to the rock and soil body, so that a part of the drill bit 17 drills into the surrounding rock and soil body.
[0049] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0050] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims
1. A rock layer migration monitoring point anchoring device, characterized in that: The invention comprises a base plate (1), a rotating plate (2) is rotatably mounted on the base plate (1) via a bearing, a bracket (3) is mounted on the rotating plate (2), a winding assembly (4) is rotatably mounted on the bracket (3) via a bearing, a reciprocating mechanism (5) is mounted on one side of the bracket (3), the winding assembly (4) is transmission-connected to the reciprocating mechanism (5) via a belt (18), a first guide wheel (6) is mounted on the reciprocating mechanism (5), two symmetrical first hinge seats (7) are fixedly mounted on the bracket (3), a telescopic rod (8) is hingedly mounted on the first hinge seat (7), and an adjustment assembly (9) is mounted on both the telescopic rod (8) and the bracket (3); A fixed block (10) is installed on the telescopic rod (8), and a rotating shaft (11) is rotatably installed on the fixed block (10) through a bearing, and a second guide wheel (12) is fixedly installed on the rotating shaft (11). The winding assembly (4), the first guide wheel (6) and the second guide wheel (12) are connected with a cable (13), and an anchor head (14) is installed at the end of the cable (13). A support column (15) is installed in the anchor head (14), and a plurality of servo electric cylinders (16) are fixedly installed on the support column (15), and a drill bit (17) is fixedly installed on the output end of the servo electric cylinder (16).
2. A rock layer migration monitoring point anchoring device according to claim 1, characterized in that: The winding assembly (4) comprises a first servo motor (41) and a winding roller (42), the two ends of the winding roller (42) are rotatably mounted on the bracket (3) via bearings, the first servo motor (41) is fixedly mounted on the bracket (3), the first servo motor (41) is transmission-connected to the winding roller (42) via a coupling, and the belt (18) is sleeved on the winding roller (42).
3. The rock layer migration monitoring point anchoring device according to claim 1 is characterized in that: The reciprocating mechanism (5) comprises a reciprocating screw rod (51), a guide rod (52), a pulley (53) and a movable slider (54); both ends of the reciprocating screw rod (51) are rotatably mounted on the bracket (3) via bearings; both ends of the guide rod (52) are fixed on the bracket (3); the pulley (53) is fixedly mounted on the input end of the reciprocating screw rod (51); the movable slider (54) is threadedly connected to the reciprocating screw rod (51) and slidably mounted on the guide rod (52); and the pulley (53) is connected to the belt (18).
4. The rock layer migration monitoring point anchoring device according to claim 1 is characterized in that: The telescopic rod (8) comprises a first adjusting rod (81), a second adjusting rod (82) and a locking screw (83); one end of the first adjusting rod (81) is hinged on the first hinge seat (7); the second adjusting rod (82) is slidably installed in the first adjusting rod (81); and the first adjusting rod (81) is connected to the second adjusting rod (82) via the locking screw (83).
5. The rock layer migration monitoring point anchoring device according to claim 4 is characterized in that: The adjustment assembly (9) comprises two second hinged seats (91) and an electric push rod (92), wherein the two second hinged seats (91) are fixedly mounted on the first adjustment rod (81) and the bracket (3) respectively, and the two ends of the electric push rod (92) are hinged on the two second hinged seats (91).
6. The rock layer migration monitoring point anchoring device according to claim 1, characterized in that: A plurality of insertion holes (19) are provided on the circumferential surface of the anchor head (14), cleaning blocks (20) are installed in the plurality of insertion holes (19), and the drill bit (17) is inserted into the cleaning blocks (20).
7. The rock layer migration monitoring point anchoring device according to claim 1, characterized in that: A plurality of equidistant threaded columns (21) are fixedly mounted on the lower surface of the base plate (1); a threaded rod (22) is internally threadedly connected to the threaded column (21); and a support block (23) is rotatably mounted on the threaded rod (22) via a bearing.
8. The rock layer migration monitoring point anchoring device according to claim 7, characterized in that: A plurality of positioning pins (24) are fixedly mounted on the lower surface of the support block (23), and a hand wheel (25) is fixedly mounted on the upper end of the threaded rod (22).
9. The rock layer migration monitoring point anchoring device according to claim 1, characterized in that: A first gear (26) is fixedly mounted on the lower surface of the rotating plate (2).
10. The rock layer migration monitoring point anchoring device according to claim 9, characterized in that: A second servo motor (27) is mounted on the lower surface of the base plate (1), a second gear (28) is fixedly mounted on the output end of the second servo motor (27), and the second gear (28) is meshed with the first gear (26).
Citation Information
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Stratum displacement monitoring method based on belt driving
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Coal mine roadway surrounding rock deformation characteristic joint monitoring system and monitoring method
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