Large-diameter pre-pressure-relief hole collapse monitoring device for coal mine

Abstract

The invention discloses a coal mine large-diameter pre-pressure-relief hole collapse monitoring device which comprises a bag arranged in a pressure relief hole, an inner cavity of the pressure relief hole is filled with the bag, a plurality of pressure sensors are distributed on the bag, the pressure sensors are connected with a data collector through a data transmission line, and the data collector is connected with the pressure relief hole through a data transmission line. The data collector is connected with a data processing module; when the pressure relief hole changes, the bag can be extruded, the pressure sensor can detect the pressure change of the bag in time, the detection result is transmitted to a worker in real time through the data collector and the data processing module, and the hole collapse condition can be monitored in real time; the technical problems that hole collapse is difficult to find in time and the pressure relief effect cannot be dynamically evaluated in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the field of rock burst prevention and control, and particularly to a large-diameter pre-pressure relief hole collapse monitoring device for coal mines. Background Art

[0002] In the work of rock burst prevention and control, the construction of large-diameter pre-pressure relief holes is a crucial pressure relief measure. However, the problem of hole collapse often occurs and is difficult to be detected in time. In the prior art, there is a lack of a convenient and effective hole collapse monitoring means like tire pressure monitoring, and it is impossible to observe the degree of hole collapse of the pressure relief hole through real-time online monitoring. Furthermore, it is impossible to dynamically master the stress change of the coal body, and it is difficult to conduct real-time dynamic evaluation of the pressure relief effect of the working face.

[0003] The current main control measures for rock burst prevention are large-diameter pressure relief of coal seams. After pre-pressure relief holes are constructed in front of the working face, it is impossible to conduct real-time dynamic monitoring of the pressure relief effect. Currently, there is no monitoring means for the collapse situation of the pressure relief holes. Therefore, it is impossible to achieve dynamic monitoring of the pressure relief holes and impossible to conduct real-time evaluation of the monitoring effect. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a large-diameter pre-pressure relief hole collapse monitoring device for coal mines.

[0005] To solve the above technical problem, the technical solution of the present invention is: a large-diameter pre-pressure relief hole collapse monitoring device for coal mines, including a bladder disposed in the pressure relief hole, the bladder filling the inner cavity of the pressure relief hole, a plurality of pressure sensors distributed on the bladder, the pressure sensors being connected to a data collector through a data transmission line, and the data collector being connected to a data processing module.

[0006] Optionally, the bladder extends along the depth direction of the pressure relief hole; the pressure sensors are distributed along the extending direction of the bladder.

[0007] Optionally, the distance between two adjacent pressure sensors is 0.8 meters to 1.2 meters.

[0008] Optionally, the bladder extends along the depth direction of the pressure relief hole; the bladder includes a plurality of elliptical bags connected in series, and all the elliptical bags are internally connected.

[0009] Optionally, one pressure sensor is disposed on the outer wall of each elliptical bag.

[0010] Optionally, the pressure sensor is bonded to the outer wall of the bladder.

[0011] Optionally, a card seat with a card slot is disposed on the outer wall of the bladder, and a card connecting strip cooperating with the card slot is disposed on the pressure sensor.

[0012] Optionally, each of the pressure sensors is connected to one of the data transmission lines, and all the data transmission lines are connected to the data collector in parallel.

[0013] Optionally, the data collector includes a single-chip microcomputer for preliminarily processing the detection data of the pressure sensors.

[0014] Optionally, the data processing module includes a host computer for deeply processing and analyzing data, and the host computer is connected to a display for displaying the results of data processing and analysis.

[0015] The beneficial effects of the present application are as follows: The large-diameter pre-pressure relief hole collapse monitoring device for coal mines described in the present application includes a bladder disposed in the pressure relief hole. The bladder fills the inner cavity of the pressure relief hole, and a plurality of pressure sensors are distributed on the bladder. The pressure sensors are connected to a data collector through data transmission lines, and the data collector is connected to a data processing module. When the pressure relief hole changes, the bladder will be squeezed, and the pressure sensors can timely detect the pressure change of the bladder. The detection results are transmitted to the staff in real time through the data collector and the data processing module, enabling real-time monitoring of the collapse situation and solving the technical problems in the prior art that it is difficult to timely detect the collapse and impossible to dynamically evaluate the pressure relief effect. Description of the Drawings

[0016] The following drawings are only intended to illustrate and explain the present invention and do not limit the scope of the present invention. Among them: Figure 1 is a schematic structural diagram of an embodiment of the present invention; In the figure: 11 - pressure relief hole; 12 - rib support bolt; 2 - bladder; 31 - pressure sensor; 32 - data collector; 33 - host computer; 34 - display. Detailed Embodiments

[0017] The present invention will be further described below in conjunction with the drawings and embodiments. In the following detailed description, only some exemplary embodiments of the present invention are described by way of illustration. It is understood that those of ordinary skill in the art can recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of protection of the claims.

[0018] As Figure 1As shown in the figure, a large-diameter pre-pressure relief hole 11 collapse monitoring device for coal mines includes a bladder 2 arranged in the pressure relief hole 11. The bladder 2 fills the inner cavity of the pressure relief hole 11. A plurality of pressure sensors 31 are distributed on the bladder 2. The pressure sensors 31 are connected to a data collector 32 through a data transmission line, and the data collector 32 is connected to a data processing module.

[0019] The size of the bladder 2 can be customized according to the diameter of the pressure relief hole 11, and it is advisable to fill the inner cavity of the pressure relief hole 11 with the bladder 2. The material for making the bladder 2 is selected as a flexible material, which has certain flexibility and compressive resistance.

[0020] Further, the bladder 2 extends along the depth direction of the pressure relief hole 11; the pressure sensors 31 are distributed along the extension direction of the bladder 2. In order to obtain more accurate monitoring data, the pressure sensors 31 are evenly distributed on the bladder 2.

[0021] Further, the interval distance between two adjacent pressure sensors 31 is 0.8 meters to 1.2 meters, and the preferred distance is one meter.

[0022] Further, since the pressure relief hole 11 is relatively deep, a plurality of rib support bolts 12 are arranged around the pressure relief hole 11. The bladder 2 extends along the depth direction of the pressure relief hole 11; the bladder 2 includes a plurality of elliptical bag bodies connected in series, and all the elliptical bag bodies are internally connected.

[0023] Or the bladder 2 is a long strip-shaped bladder 2. At regular intervals (such as one meter), a band is provided. The pressure of the band reduces the outer diameter of the bladder 2 at this place but does not disconnect the bladder 2. Under the action of a plurality of bands, the bladder 2 is divided into multiple sections, and each section of the bladder 2 forms an elliptical shape.

[0024] Further, one pressure sensor 31 is arranged on the outer wall of each elliptical bag body.

[0025] Further, the pressure sensor 31 is bonded to the outer wall of the bladder 2. That is, the pressure sensor 31 is bonded to the bladder 2 through glue.

[0026] Further, a card seat with a card slot (not shown in the figure) is arranged on the outer wall of the bladder 2, and a card connecting strip matched with the card slot is arranged on the pressure sensor 31. The card seat is bonded to the bladder 2, and the card connecting strip of the pressure sensor 31 can be inserted into the card slot of the card seat; when a certain pressure sensor 31 has a problem and needs to be replaced, the card connection method makes the replacement very convenient.

[0027] Further, each of the pressure sensors 31 is connected to one of the data transmission lines, and all the data transmission lines are connected to the data collector 32 in parallel.

[0028] The data collector 32 includes a single-chip microcomputer for preliminarily processing the detection data of the pressure sensors 31. The data collector 32 can also adopt other programmable logic devices.

[0029] Further, the data processing module includes a host 33 for deeply processing and analyzing the data, and the host 33 is connected to a display 34 for displaying the results of data processing and analysis. The configuration of the host 33 can be set according to needs. The host 33 includes at least a CPU processor, a data storage unit, and a wired or wireless data transceiver module. The settings of the host 33 can refer to the setting mode of a computer host 33. The structures and connection methods of each module belong to the common knowledge in the art and will not be elaborated here.

[0030] The pressure sensors 31 are installed on the retractable bladder 2, and the bladder 2 is placed in the pressure relief hole 11. The size of the bladder 2 can be customized according to the diameter of the pressure relief hole 11, and the material has certain flexibility and compressive resistance. The pressure sensors 31 are evenly distributed along the bladder 2, and the distance between adjacent sensors can be set according to actual needs (for example, one per meter) to sense the pressure changes at different positions.

[0031] One end of the data transmission line is connected to the pressure sensor 31, and the other end is connected to the data collector 32. The data collector 32 transmits the collected pressure signals to the processor of the host 33 by wired or wireless (such as an underground ring network, etc.) means. The processor analyzes and processes the data, and converts the pressure data into information about the degree of borehole collapse. The display 34 is connected to the processor and is used to intuitively display the borehole collapse situation corresponding to each sensor position.

[0032] When the pressure relief hole 11 collapses, the fallen coal or rock will squeeze the bladder 2, and the pressure sensors 31 on the bladder 2 will sense the pressure change. The pressure sensors 31 transmit the pressure signals to the data collector 32 through the data transmission line, and the data collector 32 transmits the signals to the processor of the host 33. The processor analyzes the pressure change situation according to a preset algorithm to determine the degree of borehole collapse, and displays it on the display terminal. The staff can timely understand the borehole collapse situation of the pressure relief hole 11 according to the displayed information, so as to adjust the measures for preventing and controlling rock bursts.

[0033] The above has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and all these changes and improvements fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A large-diameter pre-pressure relief hole collapse monitoring device for coal mines, characterized in that: It includes a bladder disposed within a pressure relief hole, the bladder filling the inner cavity of the pressure relief hole, and a plurality of pressure sensors are distributed on the bladder. The pressure sensors are connected to a data collector through data transmission lines, and the data collector is connected to a data processing module.

2. The large-diameter pre-pressure relief hole caving monitoring device for coal mines according to claim 1, characterized in that: The bladder extends along the depth direction of the pressure relief hole; the pressure sensors are distributed along the extension direction of the bladder.

3. The large-diameter pre-pressure relief hole caving monitoring device for coal mines according to claim 2, wherein: The distance between two adjacent pressure sensors is 0.8 meters to 1.2 meters.

4. The large-diameter pre-pressure relief hole caving monitoring device for coal mines according to claim 1, wherein: The bladder extends along the depth direction of the pressure relief hole; the bladder includes a plurality of oval-shaped bag bodies connected in series, and all the oval-shaped bag bodies are internally connected.

5. The large-diameter pre-pressure relief hole caving monitoring device for coal mines according to the claim is characterized in that: One pressure sensor is provided on the outer wall of each oval-shaped bag body.

6. The large-diameter pre-pressure-relief hole caving monitoring device for coal mines according to claim 1, characterized in that: The pressure sensor is bonded to the outer wall of the bladder.

7. The large-diameter pre-pressure relief hole collapse monitoring device for coal mines according to claim 1, characterized in that: A card holder with a card slot is provided on the outer wall of the bladder, and a clamping bar that cooperates with the card slot is provided on the pressure sensor.

8. The large-diameter pre-pressure relief hole caving monitoring device for coal mines according to claim 1, characterized in that: Each pressure sensor is connected to one data transmission line, and all the data transmission lines are connected to the data collector in parallel.

9. The large-diameter pre-pressure-relief hole collapse monitoring device for coal mines according to claim 1, wherein: The data collector includes a single-chip microcomputer that preliminarily processes the detection data of the pressure sensors.

10. The large-diameter pre-pressure-relief hole caving monitoring device for coal mines according to any one of claims 1 to 9, characterized in that: The data processing module includes a host computer that deeply processes and analyzes the data, and the host computer is connected to a display for displaying the results of data processing and analysis.

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