Coal mine tunnel top and bottom plate movement amount measuring device

Abstract

The utility model relates to a coal mine tunnel top and bottom plate movement amount measuring device, which comprises a top foot arranged at the top of a tunnel, a ground foot arranged at the bottom of the tunnel, a telescopic rod connected with the top foot and the ground foot, and a pull rope sensor with a pull rope, and is characterized in that the telescopic rod comprises an inner rod connected with the top foot and a sleeve rod connected with the ground foot; one end of the inner rod is slidably arranged in the sleeve rod in a penetrating mode, one end of the pull rope penetrates into and is fixed in the inner rod, and when the inner rod is driven to slide relative to the sleeve rod, the pull rope sensor measures the stretching length of the pull rope. According to the device for measuring the moving amount of the top and bottom plates of the coal mine tunnel, the telescopic rod is arranged to connect the top and the bottom of the tunnel, and the sensor with the pull rope is arranged to accurately measure the tensile length of the pull rope, so that the moving amount of the top and bottom plates is accurately reflected.

Description

Technical Field

[0001] This utility model relates to the technical field of coal mine measuring devices, and in particular to a measuring device for the displacement of the roof and floor of a coal mine roadway. Background Technology

[0002] In coal mining, the stability of roadways is crucial to mine safety. Roof and floor approach is a key indicator of roadway stability, reflecting the change in relative displacement between the roof and floor. Accurate measurement of roof and floor approach is essential for timely detection of roadway deformation, prevention of roof collapse accidents, and optimization of support design.

[0003] However, existing roof and floor approach measurement devices have many problems in practical applications. On the one hand, the range of traditional measuring devices is usually fixed and cannot be flexibly adjusted according to the actual deformation of the roadway. For example, in some roadways with small deformations, a device with a fixed range may not be able to accurately measure minute approach amounts; while in roadways with large deformations, the range may be insufficient to effectively monitor large displacements of the roof and floor. This limitation of non-adjustable range restricts the applicability of the device, making it unsuitable for use in roadways with different geological conditions and mining stages.

[0004] On the other hand, existing measuring devices are relatively complex to operate, typically requiring manual reading and recording at regular intervals. This is not only time-consuming and labor-intensive but also prone to measurement errors due to human factors. Furthermore, traditional devices lack intelligent functions, failing to transmit and analyze measurement data in real time, thus failing to meet the demands of modern mines for automated monitoring. During coal mining, roadway deformation is a dynamic process requiring real-time monitoring data for timely intervention. These shortcomings of traditional devices severely impact the efficiency and accuracy of roadway safety monitoring. Utility Model Content

[0005] The purpose of this utility model is to provide a device for measuring the displacement of the roof and floor plates in coal mine roadways, which is designed to facilitate [the use of such devices].

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a coal mine roadway top and bottom plate movement measurement device is provided, comprising: a top foot set at the top of the roadway, a bottom foot set at the bottom of the roadway, a telescopic rod connecting the top foot and the bottom foot, and a sensor with a pull rope;

[0007] The telescopic rod includes an inner rod connected to the top foot and a sleeve rod connected to the bottom foot. One end of the inner rod is slidably inserted into the sleeve rod, and one end of the pull rope is inserted into and fixed in the inner rod. When the inner rod is driven to slide relative to the sleeve rod, the sensor measures the stretch length of the pull rope.

[0008] Furthermore, the telescopic rod is provided with a limiting structure to prevent the inner rod from coming out.

[0009] Furthermore, the limiting structure includes a sliding groove extending along the length direction of the inner rod and a limiting bolt disposed on the sleeve rod. The limiting bolt is disposed on the tube wall of the sleeve rod along a length direction perpendicular to the inner rod, and the main body of the limiting bolt is slidably disposed within the sliding groove.

[0010] Furthermore, multiple limiting bolts are arranged at intervals along the length of the sleeve rod.

[0011] Furthermore, the inner rod has a guide tube at the end away from the sleeve rod for the pull rope to pass through, and a fixing post for fixing the pull rope is provided at the other end of the inner rod along its length direction perpendicular to itself.

[0012] Furthermore, a return spring for sliding reset of the inner rod is provided inside the sleeve rod. One end of the return spring is fixedly disposed inside the sleeve rod, and the other end of the return spring is connected to the inner rod.

[0013] Furthermore, the measuring device is characterized in that it further includes an adjustment assembly connected to the telescopic rod.

[0014] Furthermore, the adjustment assembly includes an outer adjustment tube and an inner adjustment tube that are screwed together. One end of the outer adjustment tube is connected to the foot, and one end of the inner adjustment tube is screwed together to the telescopic rod.

[0015] Furthermore, a fixing rod is also provided between the adjusting inner tube and the telescopic rod.

[0016] The beneficial effects of the coal mine roadway roof and floor displacement measuring device provided by this utility model are as follows:

[0017] Compared with existing technologies, this utility model provides a coal mine roadway roof and floor slab movement measurement device. By connecting the top and bottom of the roadway with a telescopic rod and using a sensor with a pull rope to accurately measure the rope's extension length, it accurately reflects the roof and floor slab movement. Furthermore, this basic structure is applicable to various coal mine roadway environments, providing a solid foundation for subsequent improvements and optimizations. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the overall structure of a coal mine roadway roof and floor displacement measuring device provided in this embodiment of the present invention;

[0020] Figure 2 This is a structural schematic diagram of the telescopic rod, adjusting assembly, and fixing rod provided in an embodiment of the present utility model;

[0021] Figure 3 A schematic diagram of the structure of the top foot provided in an embodiment of this utility model;

[0022] Figure 4 A schematic diagram of the structure of the foot provided in an embodiment of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the limiting component provided in an embodiment of the present utility model;

[0024] Figure 6 An assembly diagram of the inner rod and the fixed rod provided in this embodiment of the utility model;

[0025] Figure 7 An assembly diagram of the inner rod and guide tube provided for an embodiment of this utility model;

[0026] Figure 8 This is a cross-sectional structural assembly drawing of the inner rod and outer tube provided for an embodiment of the present utility model.

[0027] In the diagram: 1. Top foot; 11. Support plate; 12. External pin; 2. Bottom foot; 3. Telescopic rod; 31. Inner rod; 311. Slide groove; 32. Sleeve rod; 33. Guide tube; 34. Fixed column; 4. Limit bolt; 5. Pull rope sensor; 51. Pull rope; 6. Return spring; 7. Adjustment assembly; 71. Adjustment inner tube; 72. Adjustment outer tube; 8. Fixed rod. Detailed Implementation

[0028] To make the technical problems, technical solutions, and beneficial effects to be solved by this embodiment clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this embodiment and are not intended to limit this embodiment.

[0029] Please refer to the following: Figures 1 to 8 The following describes a coal mine roadway roof and floor displacement measuring device provided in this embodiment. This coal mine roadway roof and floor displacement measuring device includes a top support 1 installed at the top of the roadway, a bottom support 2 installed at the bottom of the roadway, a telescopic rod 3 connecting the top support 1 and the bottom support 2, and a rope sensor 5 with a pull rope 51.

[0030] like Figure 3As shown, the structure of the top support 1 consists of a support plate 11 and an external pin 12, providing strong assurance for the stability and reliability of the device. The support plate 11, with its large contact area, can evenly distribute the pressure from the roadway roof, ensuring that the device remains stable even under minor vibrations or pressure changes in the roof during measurement, preventing easy displacement or loosening. This design not only enhances the device's load-bearing capacity, enabling it to withstand greater weight, but also strengthens its stability during long-term use. The external pin 12 further enhances the reliability of the connection between the top support 1 and the roadway roof support structure (such as anchor bolts, roof anchor cables, etc.). The pin's insertion connection is not only robust but also allows for flexible adjustment according to the specific support structure of the roadway roof, offering high versatility. Furthermore, this connection method facilitates quick installation and disassembly, greatly improving the efficiency of device maintenance and replacement, making operation more convenient when adjusting the device's position or performing maintenance.

[0031] At the same time, such as Figure 4 As shown, the structural cross-section of footing 2 is designed as a boss shape. This boss-shaped cross-section design increases the contact area and anti-slip capability, ensuring that footing 2 remains stable at the bottom of the tunnel even under complex conditions. This structure effectively prevents footing 2 from loosening due to vibration or impact during long-term use, thereby extending the service life of the device and reducing maintenance costs. The boss-shaped cross-section can also better adapt to complex terrain at the bottom of the tunnel, such as on stepped or uneven floors, where it can fit more tightly against the ground, ensuring the stability and reliability of the device. In addition, this design enhances the load-bearing capacity of footing 2, enabling it to better distribute the pressure at the bottom of the tunnel, maintaining stability even under high floor pressure or uneven settlement, ensuring the normal operation of the measuring device.

[0032] By installing a top support 1 at the top of the roadway and a bottom support 2 at the bottom, and connecting them with a telescopic rod 3 and a pull-rope sensor 5 with a pull rope 51, displacement measurement from the top to the bottom of the roadway is achieved. This structure not only ensures the integrity of the measurement system, but also accurately measures the extension length of the pull rope 51 through the pull-rope sensor 5, thereby accurately reflecting the amount of convergence of the roof and floor. Furthermore, this basic structure is suitable for various coal mine roadway environments, providing a solid foundation for subsequent improvements and optimizations.

[0033] Based on the overall description of the above structure, an exemplary structure of a coal mine roadway roof and floor displacement measuring device in this embodiment is as follows: Figure 1 and Figure 2 As shown. The telescopic rod 3 includes an inner rod 31 connected to the top foot 1 and a sleeve rod 32 connected to the bottom foot 2. One end of the inner rod 31 is slidably inserted into the sleeve rod 32. One end of the pull rope 5 is inserted into and fixed in the inner rod 31. When the inner rod 31 is driven to slide relative to the sleeve rod 32, the pull rope sensor 5 measures the stretching length of the pull rope 51.

[0034] Preferably, the telescopic rod 3 is equipped with a limiting structure to prevent the inner rod 31 from dislodging. This significantly improves the safety and reliability of the device, avoiding measurement interruptions or device damage caused by the inner rod 31 dislodging. Through the limiting structure, the device can maintain stable operation during long-term use, reducing measurement errors caused by mechanical failures and ensuring the accuracy and stability of the measurement results.

[0035] As a specific preferred implementation method, refer to Figure 5 As shown, the limiting structure includes a sliding groove 311 extending along the length of the inner rod 31 and a limiting bolt 4 disposed on the sleeve rod 32. The limiting bolt 4 is disposed on the tube wall of the sleeve rod 32 along the length of the inner rod 31, and the main body of the limiting bolt 4 is slidably disposed in the sliding groove 311.

[0036] By providing a sliding groove 311 on the inner rod 31 and a limiting bolt 4 on the sleeve rod 32, the inner rod 31 is kept within a predetermined track during sliding. This design not only ensures measurement accuracy but also enhances the adjustability of the device. The position of the limiting bolt 4 can be adjusted according to actual measurement needs, thus adapting to measurement requirements of different ranges. Furthermore, this limiting method is simple and compact in structure, occupies little space, and does not affect the overall design and installation of the device, further improving its practicality and flexibility.

[0037] Furthermore, preferably, multiple limiting bolts 4 are arranged at intervals along the length of the sleeve rod 32. Multiple limiting bolts 4 can more evenly distribute the stress during the sliding of the inner rod 31, further preventing the inner rod 31 from dislodging, and improving the device's adaptability to complex environments. Through this design, the device can maintain accurate measurement over a wider range, further enhancing its application value in coal mine roadway monitoring.

[0038] Furthermore, this embodiment refers to Figure 6 and Figure 7 As shown, the inner rod 31, at the end furthest from the sleeve rod 32, is provided with a guide tube 33 for the pull rope 51 to pass through, and at the other end of the inner rod 31, along its length perpendicular to itself, is a fixing post 34 for fixing the pull rope 51. This simplifies the installation and fixing process of the pull rope 51, improves the guiding efficiency of the pull rope 51, and reduces wear and interference of the pull rope 51 during the measurement process. Through the cooperation of the guide tube 33 and the fixing post 34, the device can more stably measure the tensile length of the pull rope 51, thereby ensuring the accuracy and reliability of the measurement results.

[0039] Among them, reference Figure 7As shown in the diagram, in this embodiment, the guide tube 33 and the inner rod 31 are connected by a screw connection. This screw connection is robust and reliable, maintaining stability even in complex coal mine environments and preventing loosening or detachment. Its operation is simple, facilitating quick installation and disassembly, thus improving maintenance efficiency. Simultaneously, the screw connection offers some adjustability, allowing for fine-tuning of the relative positions of the guide tube 33 and the inner rod 31, ensuring smooth insertion and fixation of the pull rope 51, improving installation accuracy and adaptability. Furthermore, by adding sealing material, the screw connection effectively prevents impurities from entering the guide tube 33, protecting the pull rope 51 and extending the device's service life. It also possesses good versatility and interchangeability, reducing production and operating costs and offering high cost-effectiveness.

[0040] To adapt to changes in roadway displacement, such as Figure 8 As shown, in this embodiment, a reset spring 6 for sliding reset of the inner rod 31 is provided inside the sleeve rod 32. One end of the reset spring 6 is fixedly installed inside the sleeve rod 32, and the other end of the reset spring 6 is connected to the inner rod 31.

[0041] The addition of the return spring 6 allows the device to automatically return to its initial state after measurement, facilitating reuse. This design not only improves the device's efficiency but also reduces manual intervention and operational complexity. Through the elastic action of the return spring 6, the device can quickly respond to displacement changes in the top and bottom plates, further enhancing the real-time performance and accuracy of the measurements. Furthermore, the design of the return spring 6 enhances the device's anti-interference capabilities, enabling stable operation even under complex geological conditions.

[0042] This embodiment describes a coal mine roadway roof and floor displacement measuring device. In the coal mine roadway, the measuring device is securely installed at the top of the roadway via a top bracket 1, while a bottom bracket 2 is fixed to the bottom of the roadway. The top bracket 1 and bottom bracket 2 are connected by a telescopic rod 3, which is the core component of the entire device and consists of an inner rod 31 and a sleeve rod 32. One end of the inner rod 31 is designed to slide freely inside the sleeve rod 32, allowing it to move freely within the sleeve rod 32 to adapt to relative displacement changes between the roadway roof and floor. One end of a pull rope 51 passes through the guide tube 33 of the inner rod 31 and is securely fixed to the fixing post 34 at the end of the inner rod 31; the other end is connected to a sensor.

[0043] When relative displacement occurs between the roof and floor of the tunnel, such as roof subsidence or floor rise, the inner rod 31 slides accordingly within the sleeve rod 32. This sliding causes the tension rope 51 to extend or retract, and the change in the length of the tension rope 51 directly reflects the displacement between the roof and floor. The sensor, using high-precision measurement technology, detects the change in the tension length of the tension rope 51 in real time and converts it into a specific displacement value. These values ​​can be recorded or sent to the monitoring system via a data transmission module, thereby achieving real-time monitoring of the distance between the roof and floor of the tunnel.

[0044] Furthermore, to accommodate greater measurement needs, the measuring device in this embodiment preferably includes an adjustment component 7 connected to the telescopic rod 3. The adjustment component 7 allows the device to be flexibly adjusted according to the actual dimensions and deformation of the roadway. Users can quickly adjust the length and position of the device according to different measurement requirements, thereby achieving more accurate measurements. This design not only improves the flexibility of the device but also further enhances its adaptability to complex environments, enabling it to better meet the actual needs of coal mine roadway monitoring.

[0045] As a preferred implementation, return Figure 1 and Figure 2 As shown, the adjustment assembly 7 includes an outer adjustment tube 72 and an inner adjustment tube 71 screwed together. One end of the outer adjustment tube 72 is connected to the foundation foot 2, and one end of the inner adjustment tube 71 is screwed to the telescopic rod 3. By rotating the outer adjustment tube 72 or the inner adjustment tube 71, the user can easily adjust the total length of the device to adapt to tunnels of different heights. This design not only improves the flexibility and applicability of the device but also further enhances its ease of operation in practical applications.

[0046] And as a further preferred option, still as Figure 1 and Figure 2 As shown, a fixing rod 8 is also provided between the adjusting inner tube 71 and the telescopic rod 3. The addition of the fixing rod 8 connects the adjusting inner tube 71 and the telescopic rod 3. This improvement not only enhances the structural stability of the adjusting assembly 7 but also further improves the accuracy and reliability of the device during the adjustment process. The design of the fixing rod 8 not only extends the measurable range of the measuring device to a certain extent but also effectively prevents the adjusting inner tube 71 from loosening or shifting during the screwing process, ensuring stable operation of the device during long-term use. This further enhances its application value in coal mine roadway monitoring.

[0047] The above description is only a preferred embodiment of this embodiment and is not intended to limit this embodiment. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this embodiment should be included within the protection scope of this embodiment.

Claims

1. A device for measuring the displacement of the roof and floor plates in a coal mine roadway, characterized in that, It includes a top foot (1) set at the top of the tunnel, a bottom foot (2) set at the bottom of the tunnel, a telescopic rod (3) connecting the top foot (1) and the bottom foot (2), and a pull rope sensor (5) with a pull rope (51). The telescopic rod (3) includes an inner rod (31) connected to the top foot (1) and a sleeve rod (32) connected to the bottom foot (2). One end of the inner rod (31) is slidably inserted into the sleeve rod (32). One end of the pull rope (51) is inserted into and fixed in the inner rod (31). When the inner rod (31) is driven to slide relative to the sleeve rod (32), the pull rope sensor (5) measures the stretch length of the pull rope (51).

2. The coal mine roadway roof and floor displacement measuring device according to claim 1, characterized in that, The telescopic rod (3) is provided with a limiting structure to prevent the inner rod (31) from coming out.

3. The coal mine roadway roof and floor displacement measuring device according to claim 2, characterized in that, The limiting structure includes a slide groove (311) extending along the length direction of the inner rod (31) and a limiting bolt (4) disposed on the sleeve rod (32). The limiting bolt (4) is disposed on the tube wall of the sleeve rod (32) along the length direction perpendicular to the inner rod (31), and the main body of the limiting bolt (4) is slidably disposed in the slide groove (311).

4. The coal mine roadway roof and floor displacement measuring device according to claim 3, characterized in that, The limiting bolts (4) are arranged in multiple intervals along the length direction of the sleeve (32).

5. A coal mine roadway roof and floor displacement measuring device according to claim 1, characterized in that, The inner rod (31) is provided with a guide tube (33) for the pull rope (51) to pass through at one end away from the sleeve rod (32), and a fixing post (34) for fixing the pull rope (51) is provided at the other end of the inner rod (31) along its length direction perpendicular to itself.

6. The coal mine roadway roof and floor displacement measuring device according to claim 1, characterized in that, The sleeve (32) is provided with a return spring (6) for sliding reset of the inner rod (31). One end of the return spring (6) is fixedly disposed in the sleeve (32), and the other end of the return spring (6) is connected to the inner rod (31).

7. A coal mine roadway roof and floor displacement measuring device according to any one of claims 1 to 6, characterized in that, The measuring device also includes an adjustment assembly (7) connected to the telescopic rod (3).

8. A coal mine roadway roof and floor displacement measuring device according to claim 7, characterized in that, The adjustment assembly (7) includes an adjustment outer tube (72) and an adjustment inner tube (71) that are screwed together. One end of the adjustment outer tube (72) is connected to the foot (2), and one end of the adjustment inner tube (71) is screwed together to the telescopic rod (3).

9. A coal mine roadway roof and floor displacement measuring device according to claim 8, characterized in that, A fixing rod (8) is also provided between the adjusting inner tube (71) and the telescopic rod (3).

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