Device for monitoring deformation of underground roadway of coal mine

Abstract

The utility model belongs to the technical field of coal mine safety monitoring, and particularly discloses a device for monitoring deformation of an underground roadway of a coal mine. The device comprises a data measurement device and a data acquisition device, wherein the data measuring device comprises a fixed hook, a telescopic rod and a laser range finder, the bottom end of the fixed hook is connected with the top end of the telescopic rod, and the bottom end of the telescopic rod is connected with the laser range finder; the data collection device comprises a collector. According to the utility model, the distance from a monitoring point to a roadway bottom plate and a roadway side foot and the angle between the monitoring point and the roadway bottom plate and the roadway side foot are measured through the laser range finders, and measured values before and after deformation are stored and displayed through the collector, so that manual calculation is not needed in the operation process, and the accuracy of a measured result can be ensured; by measuring and monitoring the deformation of the underground coal mine roadway, the deformation information of the roadway is accurately mastered, the roadway can be repaired in a targeted manner in time, and the safety of the roadway and the life safety of workers are ensured.

Description

Technical Field

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

[0002] Coal mine tunnels play an important role in the production process, with functions such as transportation, ventilation and drainage. However, with the increase in the depth of coal mining, tunnels are subject to multiple forces, and the deformation problem of tunnels is becoming increasingly prominent, which is prone to cause disasters and accidents. The purpose of monitoring tunnel deformation is to be able to take targeted repairs to the tunnels in time when large deformation occurs in the underground tunnels, to ensure the normal use of the tunnels and reduce the probability of disasters and accidents, thereby protecting the lives of workers and the safety of mine equipment and property. Therefore, tunnel deformation monitoring is of great significance to tunnel safety warning and is very important for the safe use of tunnels.

[0003] To this end, the utility model proposes a device for monitoring deformation of underground coal mine tunnels. Utility Model Content

[0004] The utility model aims to provide a device for monitoring the deformation of underground mine tunnels, which can monitor the deformation of underground mine tunnels.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A device for monitoring deformation of underground coal mine tunnels, comprising a data measuring device and a data acquisition device; the data measuring device comprises a fixed hook, a telescopic rod and a laser rangefinder;

[0007] The bottom end of the fixed hook is connected to the top end of the telescopic rod, and the bottom end of the telescopic rod is connected to the laser rangefinder; the laser rangefinder comprises a housing, a laser probe, a central processing module and a data transmission module; the laser probe is arranged on the housing, and a distance measuring module is arranged inside the laser probe;

[0008] The central processing module and the data transmission module are arranged in the housing, the distance measurement module is connected to the central processing module, and the central processing module is connected to the data transmission module;

[0009] The data acquisition device comprises a collector, a built-in module is arranged inside the collector, and the built-in module is communicatively connected with the data transmission module.

[0010] Preferably, a power supply is also provided inside the shell, and the power supply is connected to the laser probe, the central processing module and the data transmission module through a transmission cable.

[0011] Preferably, the bottom end of the fixing hook is provided with an external thread, the top end of the telescopic rod is provided with a screw hole, and the bottom end of the fixing hook is threadedly connected to the top end of the telescopic rod.

[0012] Preferably, the telescopic rod passes through the interior of the laser rangefinder and is fixed to the laser rangefinder via a claw-shaped hook provided at the bottom end of the telescopic rod.

[0013] Preferably, a sealing rubber pad is provided at the connection between the telescopic rod and the top of the shell.

[0014] Preferably, the collector is provided with a display screen, an operation panel and an indicator light.

[0015] Preferably, the collector is a handheld collector.

[0016] Preferably, the laser probe is a fully solid-state area array laser probe.

[0017] Preferably, the power source is a detachable battery.

[0018] Preferably, a timing switch is provided on the transmission cable.

[0019] The beneficial effects of the utility model are as follows:

[0020] The utility model proposes a device for monitoring the deformation of underground tunnels in coal mines. The connection between a laser rangefinder and an anchor net on a tunnel roof is realized by a fixed hook, so that the leveling step of the laser rangefinder can be omitted, and the detection efficiency is improved. The device uses a telescopic rod to adjust the measuring angle, so that the measuring angles before and after deformation are consistent, and the accuracy of subsequent measurement data is guaranteed. The device measures the distance from a monitoring point to a tunnel bottom plate and a tunnel support and the angle therebetween by a laser probe of the laser rangefinder, processes and calculates the measuring data by a central processing module of the laser rangefinder, and obtains the deformation amount of the tunnel, and collects, stores and displays the deformation amount of the tunnel before and after deformation by a collector. The process omits the step of manual calculation, and ensures the accuracy of the measurement result. By measuring and monitoring the deformation amount of the underground tunnel in the coal mine, the deformation information of the tunnel is accurately grasped, and targeted repairs are taken on the tunnel in a timely manner, so as to ensure the safety of the tunnel, protect the life safety of the staff and the safety of the mine equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the assembly of the fixed hook and the telescopic rod of the utility model;

[0023] Figure 3 It is a schematic diagram of the assembly of the telescopic rod and the laser rangefinder of the utility model;

[0024] Figure 4 This is a schematic diagram of the internal structure of the laser rangefinder of the utility model;

[0025] Figure 5 This is a schematic diagram of the front structure of the collector of the utility model;

[0026] Figure 6 This is a schematic diagram of the back structure of the collector of the utility model;

[0027] Figure 7 It is a schematic diagram of the tunnel structure of the utility model before the tunnel is deformed;

[0028] Figure 8 It is a schematic diagram of the tunnel structure after the tunnel is deformed according to the utility model;

[0029] Among them, a-tunnel profile, b-tunnel floor, c-monitoring point;

[0030] Data measuring device: 11-fixed hook, 111-external thread;

[0031] 12-telescopic rod, 121-screw hole, 122-claw hook, 123-sealing rubber pad;

[0032] 13-laser rangefinder, 131-housing, 132-laser probe, 1321-range measurement module; 133-central processing module; 134-data transmission module, 135-power supply, 136-timing switch, 137-sealing ring;

[0033] Data acquisition device: 2-collector, 20-explosion-proof housing, 21-display screen, 22-operation panel, 23-indicator light, 24-built-in module, 25-removable battery. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Combination Figures 1 to 8 As shown, the utility model proposes a device for monitoring deformation of underground coal mine tunnels, which mainly includes a data measuring device and a data acquisition device, wherein the data measuring device is used to measure specific data of tunnel monitoring points and calculate and generate data such as tunnel deformation, and the data acquisition device is used to collect, store and display the measurement data of the monitoring point.

[0037] Combination Figures 1 to 3 As shown, the data measuring device includes structural components such as a fixed hook 11, a telescopic rod 12 and a laser rangefinder 13.

[0038] Combination Figure 2 As shown, the fixed hook 11 is mainly used to hang the data measurement device, and can fix the telescopic rod 12 and the laser rangefinder 13 and other structural components on the anchor net of the tunnel roof, so as to facilitate the data measurement of the tunnel in the later stage. The bottom end of the fixed hook 11 is connected to the top of the telescopic rod 12, and the bottom end of the telescopic rod 12 is connected to the laser rangefinder 13. Among them, the bottom end of the fixed hook 11 is provided with an external thread 111, and the top end of the telescopic rod 12 is provided with a screw hole 121. The connection and fixation of the fixed hook 11 and the telescopic rod 12 are realized through the threaded cooperation of the external thread 111 and the screw hole 121. The fixed hook 11 has a large curvature and can rotate freely when suspended, ensuring that the suspension angle of the laser rangefinder 13 is vertically downward during each measurement, reducing the steps of leveling the instrument and improving the measurement efficiency.

[0039] The telescopic rod 12 can be freely extended to a certain length range according to the measurement requirements. When measuring, the measurement angle can be adjusted by changing the length of the telescopic rod 12. Figure 3 As shown, the bottom end of the telescopic rod 12 is connected to the laser rangefinder 13 and passes through the interior of the laser rangefinder 13 , and is fixed to the laser rangefinder 13 via a claw-shaped hook 122 provided at the bottom end of the telescopic rod 12 .

[0040] Combination Figure 4 As shown, the laser rangefinder 13 is the main structure for monitoring and measuring the deformation of the tunnel, and includes structural components such as a housing 131, a laser probe 132, a central processing module 133, and a data transmission module 134. Among them, the housing 131 is a protective shell that can ensure that the internal components of the laser rangefinder 13 are not damaged. At the same time, a sealing rubber pad 123 is provided at the connection between the telescopic rod 12 and the top of the housing 131 to ensure good sealing of the laser rangefinder 13.

[0041] Combination Figure 4As shown, a laser probe 132 is arranged on the shell 131. The laser probe 132 adopts a fully solid-state array laser probe. The laser probe 132 emits a single beam of laser and can perform operations such as distance measurement and angle measurement on the tunnel. At the same time, a distance measurement module 1321 is arranged inside the laser probe 132, which is responsible for data measurement and data transmission of the laser probe 132. A central processing module 133 and a data transmission module 134 are arranged in the shell 131. The distance measurement module 1321 is connected to the central processing module 133, and the central processing module 133 is connected to the data transmission module 134. The central processing module 133 is used to process and calculate the data from the laser probe 132, and generate data such as tunnel deformation and cross-section displacement, and can also perform data storage and data transmission. The data transmission module 134 can realize the intercommunication between the data measurement device and the data acquisition device, that is, the data transmission module 134 receives commands from the data acquisition device and sends instructions to the central processing module 133, so as to realize the purpose of the data acquisition device controlling the data measurement device, and can also send the data stored and processed in the central processing module 133 to the data acquisition device, so as to finally realize the intercommunication between the data measurement device and the data acquisition device. At the same time, a sealing ring 137 is provided at the connection of each module, which can protect the internal circuit from damage, ensure the accuracy of the measurement data and the smooth progress of the measurement process.

[0042] Combination Figure 4 As shown, a power supply 135 is also provided inside the housing 131, and the power supply 135 is connected to the laser probe 132, the central processing module 133 and the data transmission module 134 through a transmission cable. The power supply 135 can supply power to the entire data measurement device, and the power supply 135 uses a detachable battery, which is convenient for timely replacement to ensure smooth measurement. At the same time, a timer switch 136 is provided on the transmission cable connecting the power supply 135 to each module, which can achieve the purpose of timed measurement, and the laser probe 132 can measure on time according to the set time, thereby achieving timed measurement.

[0043] Combination Figure 1 As shown, the data acquisition device includes a collector 2. The collector 2 is a handheld collector, which is convenient for staff to pick up and use. At the same time, the collector 2 can control the data measurement device and realize the collection, storage and display of measurement data.

[0044] Combination Figures 5 and 6As shown, the collector 2 is composed of an explosion-proof housing 20, a display screen 21, an operation panel 22, an indicator light 23 and a built-in module 24. The main function of the collector 2 is to operate and remotely control the data measurement device to complete the measurement task, which can realize the collection and deletion of the internal storage data of the laser rangefinder 13, and complete the functions of collecting, storing and displaying the measurement data. The explosion-proof housing 20 arranged outside the collector 2 can be used to protect the internal components from damage and ensure the smooth progress of the data collection work. A display screen 21 is arranged above the front of the collector 2, and the display screen 21 can display data such as the collection time, the displacement of the cross section and the deformation of the monitoring point. An operation panel 22 is arranged below the display screen 21, and the operation panel 22 includes buttons such as collection, deletion, and numbers. The data measurement device can be encoded and the collection time interval can be set by pressing the buttons. The indicator light 23 is located at the top of the collector 2, and the operator is prompted by the flashing light whether the collector 2 is working normally. The collector 2 is provided with a built-in module 24, and the built-in module 24 establishes a communication connection with the data transmission module 134. The embodiment adopts an infrared wireless remote control method to realize the communication connection between the built-in module 24 and the data transmission module 134, and wirelessly controls the laser rangefinder 13 to perform measurement and calculation. After the data in the laser rangefinder 13 is collected, the data in the laser rangefinder 13 can be deleted and stored in the storage unit of the built-in module 24. A removable battery 25 is provided on the back of the collector 2 to power the collector 2.

[0045] The built-in module 24 of the collector 2 wirelessly remotely controls the data transmission module 134 to achieve intercommunication between the data measurement device and the data collection device. The data transmission module 134 receives commands from the data collection device and sends instructions to the central processing module 133 to achieve the purpose of the data collection device controlling the data measurement device. The central processing module 133 processes and calculates the data from the laser probe 132, generates data such as the deformation of the tunnel, and performs data storage and data transmission. The data transmission module 134 transmits the data stored in the central processing module 133 to the built-in module 24. After the data is collected, the data of the central processing module 133 in the laser rangefinder 13 can be deleted and stored in the storage unit of the built-in module 24. Later, the measurement data of different monitoring points in the tunnel are imported into the computer and a deformation curve is generated to grasp the overall deformation of the tunnel.

[0046] The device of the utility model can reduce the steps of manual calculation and the calculation result is more accurate, the operation is simple and convenient, and the learning steps are simplified, thereby reducing the cost of manual learning.

[0047] Combination Figure 7 and Figure 8 As shown, the use and measurement method of the utility model of the coal mine underground tunnel deformation monitoring device are as follows:

[0048] First of all, it should be noted that for a single tunnel, monitoring points can be arranged according to its specific structural design, and point marks can be sprayed on the tunnel roof according to the arranged monitoring points to ensure that the measurement position is consistent each time;

[0049] Secondly, the data measuring device is hung at the spray point position of the roof. Before measuring, the fixed hook 11 is fixed to the telescopic rod 12 through the screw hole 121. The telescopic rod 12 passes through the hole of the laser rangefinder 13 and is fixed by the claw hook 122 of the telescopic rod 12. After the telescopic rod 12 is connected to the laser rangefinder 13, it is hung on the anchor net of the tunnel roof through the fixed hook 11.

[0050] Then, the data acquisition device controls the data measurement device to start measuring, opens the collector 2, calls the measuring point name, and actively retrieves the last measurement information of the monitoring point. The last measured data is used as the basis for the next measurement and calculation, and controls the laser rangefinder 13 to measure;

[0051] Finally, the laser rangefinder 13 sends the data to the collector 2, and the display screen of the collector 2 will display the deformation of the measured point and store it.

[0052] The specific principle of the device for monitoring deformation of underground coal mine tunnels of the utility model is as follows:

[0053] Combination Figure 7 As shown in the figure, before the tunnel is deformed, the initial measurement value of the distance between the monitoring point c and the tunnel bottom plate b is h 1 The initial measurement value of the distance between the monitoring point c and the roadway support is h 2 The angle between them is θ 1 ;

[0054] Combination Figure 8 As shown, after the tunnel is deformed, the length of the telescopic rod 12 is controlled so that the angles from the monitoring point c to the tunnel bottom plate b and the tunnel support are equal, that is, θ 11 =θ 1 At this time, the measured value of the distance from the monitoring point c to the tunnel floor b after deformation is h 11 The measured value of the distance from the monitoring point c to the side of the roadway after deformation is h 22 ;

[0055] At this time, the deformation of the roadway can be calculated based on the triangle similarity principle.

[0056] Using the triangle similarity law, we can get:

[0057]

[0058] Get h 底 ;

[0059] The data measured after the roadway deformation:

[0060]

[0061] Get y 2 ;

[0062] Finally, the deformation of the tunnel floor h f :

[0063] h f =h 底 -h 11 +y 2

[0064] This method is applicable to deformation measurement of any point in the tunnel. After the laser rangefinder 13 measures the data, the central processing module 133 processes and calculates it, and the collector 2 stores and displays the deformation h of the monitoring point c. f .

[0065] The utility model proposes a device for monitoring the deformation of underground tunnels in coal mines. The connection between a laser rangefinder 13 and an anchor net of a tunnel roof is realized by a fixed hook 11, and the leveling step of the laser rangefinder 13 can be omitted, thereby improving the measurement efficiency. The device uses a telescopic rod 12 to adjust the measurement angle, so that the measurement angles before and after deformation are consistent, thereby ensuring the accuracy of subsequent measurement data. The distance from the monitoring point c to the tunnel bottom plate b and the tunnel support and the angle therebetween are completed by a laser rangefinder, and the measurement data is processed and calculated by a central processing module 133, and the deformation amount of the tunnel before and after deformation is stored and displayed by a collector 2, thereby omitting the step of manual calculation, thereby ensuring the accuracy of the measurement result. By measuring and monitoring the deformation amount of the underground tunnel in the coal mine, the deformation information of the tunnel is accurately grasped, so that targeted repairs can be taken to the tunnel in a timely manner, thereby ensuring the safety of the tunnel, protecting the life safety of the staff, and the safety of the property of the mine equipment.

[0066] Of course, the above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept of the utility model, or direct / indirect application in other related technical fields are included in the patent protection scope of the utility model and should be protected by the utility model.

Claims

1. A device for monitoring deformation of underground coal mine tunnels, characterized in that: It includes a data measuring device and a data collecting device; The data measuring device includes a fixed hook, a telescopic rod and a laser rangefinder; The bottom end of the fixed hook is connected to the top end of the telescopic rod, and the bottom end of the telescopic rod is connected to the laser rangefinder; The laser rangefinder comprises a housing, a laser probe, a central processing module and a data transmission module; The laser probe is arranged on the shell, and a distance measuring module is arranged inside the laser probe; The central processing module and the data transmission module are arranged in the housing, the distance measurement module is connected to the central processing module, and the central processing module is connected to the data transmission module; The data acquisition device comprises a collector, wherein the collector is provided with a built-in module, and the built-in module is communicatively connected with the data transmission module.

2. The device for monitoring deformation of underground coal mine tunnels according to claim 1, characterized in that: A power supply is also provided inside the shell, and the power supply is connected to the laser probe, the central processing module and the data transmission module through a transmission cable.

3. The device for monitoring deformation of underground coal mine tunnels according to claim 1, characterized in that: The bottom end of the fixing hook is provided with an external thread, the top end of the telescopic rod is provided with a screw hole, and the bottom end of the fixing hook is threadedly connected to the top end of the telescopic rod.

4. The device for monitoring deformation of underground coal mine tunnels according to claim 1, characterized in that: The telescopic rod passes through the interior of the laser rangefinder and is fixed to the laser rangefinder via a claw-shaped hook arranged at the bottom end of the telescopic rod.

5. The device for monitoring deformation of underground coal mine tunnels according to claim 1, characterized in that: A sealing rubber pad is provided at the connection between the telescopic rod and the top of the shell.

6. The device for monitoring deformation of underground coal mine tunnels according to claim 1, characterized in that: The collector is provided with a display screen, an operation panel and indicator lights.

7. The device for monitoring deformation of underground coal mine tunnels according to claim 1, characterized in that: The collector is a handheld collector.

8. The device for monitoring deformation of underground coal mine tunnels according to claim 1, characterized in that: The laser probe adopts a full solid-state area array laser probe.

9. The device for monitoring deformation of underground coal mine tunnels according to claim 2, characterized in that: The power source adopts a detachable battery.

10. The device for monitoring deformation of underground coal mine tunnels according to claim 2, characterized in that: The transmission cable is provided with a timing switch.

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