Method, device and equipment for monitoring periodic weighting of working face and storage medium

By setting a piezoelectric unit at the contact point between the roof support equipment and the working face roof, monitoring the power generation and judging the pressure status, the problem of early warning of roof rock collapse during coal seam mining is solved and the accuracy of safety monitoring is improved.

CN120668292APending Publication Date: 2025-09-19CCTEG COAL MINING RES INST
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Patent Information

Application Number
CN202510662634.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-21
Publication Date
2025-09-19

AI Technical Summary

Technical Problem

In the existing technology, the collapse of roof rock layers caused by periodic pressure during coal mining may cause accidents, which is difficult to effectively monitor and warn.

Method used

By setting piezoelectric units at the contact point between the roof support equipment and the working face roof, monitoring the power generation within a unit time period, determining the target piezoelectric units and judging whether the working face is in a pressure state based on the relationship between their number and the total number of equipment.

Benefits of technology

It achieves more accurate judgment of the pressure status of the working face and improves the accuracy and early warning capability of safety monitoring.

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Abstract

The invention provides a working face periodic weighting monitoring method, device and equipment and a storage medium, and the method comprises the steps: obtaining the first power generation amount of each piezoelectric unit in a plurality of piezoelectric units in a unit time period; wherein different piezoelectric units are arranged at contact parts of different roof supporting equipment and a working face roof; determining a target piezoelectric unit in the plurality of piezoelectric units based on the first generating capacity; wherein the first generating capacity of the target piezoelectric unit is greater than or equal to a preset generating capacity threshold value; obtaining a first equipment number of the roof support equipment corresponding to the target piezoelectric unit; and whether the working face is in a weighting state or not is determined based on the quantitative relation between the first equipment number and the total equipment number of the top plate supporting equipment. According to the technical scheme, the weighting state of the working face can be judged more accurately.
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Description

Technical Field

[0001] The present application relates to the technical field of safe mining of coal mines, and in particular to a method, device, equipment and storage medium for monitoring periodic pressure on a working face. Background Art

[0002] During the coal mining process, after the coal seam is mined, it is covered by a thick hard rock layer to form a suspended roof structure. When the suspended roof area reaches its limit, it will break and collapse. Periodic pressure is a pressure manifestation phenomenon caused by the periodic collapse of the roof rock layer, which may cause accidents such as roof falls and rock spalling.

[0003] In related technologies, the periodic pressure is usually monitored by means of hydraulic support working resistance, micro-seismic monitoring, etc. Summary of the Invention

[0004] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] In the first aspect, the present application proposes a method for monitoring periodic pressure on a working face, the method comprising: obtaining a first power generation of each of a plurality of piezoelectric units within a unit time period; wherein different piezoelectric units are arranged at contact positions between different roof support devices and the working face roof; determining a target piezoelectric unit among the plurality of piezoelectric units based on the first power generation; wherein the first power generation of the target piezoelectric unit is greater than or equal to a preset power generation threshold; obtaining a first device quantity of the roof support equipment corresponding to the target piezoelectric unit; and determining whether the working face is in a pressure state based on a quantitative relationship between the first device quantity and the total device quantity of the roof support equipment.

[0006] In one implementation, the power generation threshold is obtained by the following steps: obtaining the first historical power generation of the multiple piezoelectric units in the first historical unit time period and the number of the first historical unit time period; wherein, the first historical unit time period is a period when the working surface is not in a pressure-receiving state; based on the first historical power generation and the number of the first historical unit time period, obtaining the average value of the first historical power generation as the power generation threshold.

[0007] In one implementation, the method further includes: obtaining a second historical power generation of the multiple piezoelectric units within a second historical unit time period; wherein the second historical unit time period is a time period when the working surface is in a pressure-incoming state; and obtaining a ratio between the first historical power generation and the second historical power generation as a first pressure-incoming level of the working surface.

[0008] In one implementation, the method further includes: determining that the roof support device corresponding to the target piezoelectric unit is in a pressure-incoming state.

[0009] In one implementation, the method further includes: determining that the working surface is in a pressure state within the unit time period, and obtaining a ratio between the first power generation and the power generation threshold as a second pressure level within the unit time period.

[0010] In one implementation, the method further includes: storing the amount of electricity generated by the plurality of piezoelectric units.

[0011] In the second aspect, the present application proposes a device for monitoring periodic pressure on a working face, the device comprising: an acquisition module for acquiring a first power generation of each of a plurality of piezoelectric units within a unit time period; wherein different piezoelectric units are arranged at contact positions between different roof support devices and the working face roof; a first processing module for determining a target piezoelectric unit among the plurality of piezoelectric units based on the first power generation; wherein the first power generation of the target piezoelectric unit is greater than or equal to a preset power generation threshold; a second processing module for acquiring a first device quantity of the roof support equipment corresponding to the target piezoelectric unit; and a third processing module for determining whether the working face is in a pressure state based on a quantitative relationship between the first device quantity and the total device quantity of the roof support equipment.

[0012] In one implementation, the power generation threshold is obtained by the following steps: obtaining the first historical power generation of the multiple piezoelectric units in the first historical unit time period and the number of the first historical unit time period; wherein, the first historical unit time period is a period when the working surface is not in a pressure-receiving state; based on the first historical power generation and the number of the first historical unit time period, obtaining the average value of the first historical power generation as the power generation threshold.

[0013] In one implementation, the device also includes a fourth processing module for obtaining a second historical power generation of the multiple piezoelectric units within a second historical unit time period; wherein the second historical unit time period is a time period when the working surface is in a pressure-incoming state; and obtaining a ratio between the first historical power generation and the second historical power generation as a first pressure-incoming level of the working surface.

[0014] In one implementation, the first processing module may also be used to determine whether the roof supporting device corresponding to the target piezoelectric unit is in a pressure-incoming state.

[0015] In one implementation, the device further includes a sixth processing module for determining whether the working surface is in a pressure state within the unit time period, and obtaining a ratio between the first power generation and the power generation threshold as a second pressure level within the unit time period.

[0016] In one implementation, the device further includes an energy storage module for storing the electricity generated by the plurality of piezoelectric units.

[0017] In a third aspect, the present application proposes an electronic device comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the working surface periodic pressure monitoring method as described in the first aspect.

[0018] In a fourth aspect, the present application proposes a computer-readable storage medium for storing instructions, which, when executed, enables the method described in the first aspect to be implemented.

[0019] In a fifth aspect, the present application proposes a computer program product, comprising a computer program, which, when executed by a processor, implements the steps of the working face periodic pressure monitoring method as described in the first aspect.

[0020] The working face periodic pressure monitoring method, device, equipment and storage medium provided in the present application can obtain the power generation of the piezoelectric unit arranged at the contact part between the roof support equipment and the working face roof in a unit time period, so as to determine the target piezoelectric unit according to the power generation of each piezoelectric unit, and thus determine whether the working face is in a pressure state according to the quantitative relationship between the number of target piezoelectric units and the total number of roof support equipment.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0023] Figure 1 This is a flow chart of a method for monitoring periodic pressure on a working face provided in an embodiment of the present application;

[0024] Figure 2 is a cross-sectional schematic diagram of the arrangement position of the piezoelectric material provided in an embodiment of the present application;

[0025] Figure 3 is a planar schematic diagram of the arrangement of piezoelectric materials provided in an embodiment of the present application;

[0026] Figure 4 This is a schematic structural diagram of a working face periodic pressure monitoring device provided in an embodiment of the present application;

[0027] Figure 5This is a schematic structural diagram of another working face periodic pressure monitoring device provided in an embodiment of the present application;

[0028] Figure 6 This is a structural diagram of another working face periodic pressure monitoring device provided in an embodiment of the present application;

[0029] Figure 7 This is a structural diagram of another working face periodic pressure monitoring device provided in an embodiment of the present application;

[0030] Figure 8 It is a structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0032] The following describes the working surface periodic pressure monitoring method and device according to an embodiment of the present application with reference to the accompanying drawings.

[0033] Figure 1 This is a flow chart of a method for monitoring periodic pressure on a working surface provided by an embodiment of the present application. Figure 1 As shown, the method may include but is not limited to the following steps:

[0034] Step S101: obtaining a first power generation amount of each piezoelectric unit in a unit time period among a plurality of piezoelectric units;

[0035] In an embodiment of the present application, different piezoelectric units are arranged at the contact positions between different roof support equipment and the working face roof.

[0036] Exemplarily, each roof support device may be provided with a plurality of piezoelectric units.

[0037] Exemplarily, the roof support equipment may be a hydraulic support.

[0038] Exemplarily, the above-mentioned unit time period may be the current unit time period.

[0039] For example, the duration of the unit period may be one hour.

[0040] Exemplarily, a piezoelectric unit is provided at the contact portion between each roof support device and the working face roof, and the first power generation of each piezoelectric unit in the current unit time period is obtained.

[0041] Step S102: determining a target piezoelectric cell among the plurality of piezoelectric cells based on the first power generation amount.

[0042] The first power generation amount of the target piezoelectric unit is greater than or equal to a preset power generation amount threshold.

[0043] Exemplarily, a piezoelectric unit whose power generation in a unit time period is greater than or equal to a preset power generation threshold is determined as a target piezoelectric unit.

[0044] In some embodiments, the roof support device corresponding to the target piezoelectric unit may be determined as the roof support device in a pressure-incoming state.

[0045] Exemplarily, the roof area corresponding to the roof support equipment where the target piezoelectric unit is located is determined as the roof area where periodic pressure occurs.

[0046] Step S103: Obtain a first device quantity of the roof support device corresponding to the target piezoelectric unit.

[0047] For example, taking the example of setting one piezoelectric unit on each roof supporting device, the number of target piezoelectric units is obtained as the first device number of the roof supporting device corresponding to the target piezoelectric unit.

[0048] Step S104: Based on the quantitative relationship between the first equipment quantity and the total equipment quantity of the roof support equipment, determine whether the working face is in a pressure state.

[0049] Exemplarily, a ratio of the first equipment quantity to the total number of roof support equipment is obtained. If the ratio is greater than or equal to a preset threshold, it is determined that the working face is in a pressure state. For example, if the ratio of the first equipment quantity to the total number of roof support equipment is greater than or equal to 20 percent, it is determined that the working face is in a pressure state.

[0050] Exemplarily, the ratio between the first equipment quantity and the total equipment quantity of the roof support equipment is obtained. If the ratio is less than a preset threshold, it is determined that the working face is not in a pressure state.

[0051] By implementing the embodiments of the present application, the power generation per unit time period of the piezoelectric units located at the contact point between the roof support equipment and the working face roof can be obtained. The target piezoelectric unit can be determined based on the power generation of each piezoelectric unit. Furthermore, based on the quantitative relationship between the number of target piezoelectric units and the total number of roof support equipment, it can be determined whether the working face is in a pressure-incoming state. This allows for a more accurate judgment of the working face pressure-incoming state.

[0052] In some embodiments, the power generation threshold in the embodiments of the present application can be obtained by the following steps:

[0053] Step A1: Obtain a first historical power generation amount and the number of the first historical unit time period of a plurality of piezoelectric units.

[0054] In an embodiment of the present application, the first historical unit period is a historical unit period in which the working surface is not in a pressure state.

[0055] Exemplarily, the total power generation of all piezoelectric units on the working surface in each time period in all first historical unit time periods is obtained as the first historical power generation.

[0056] Step A2: Based on the first historical power generation and the number of the first historical unit time period, an average value of the first historical power generation is obtained as a power generation threshold.

[0057] Exemplarily, the first historical power generation is divided by the number of first historical unit time periods to obtain an average value of the first historical power generation, which is used as the power generation threshold.

[0058] In some embodiments, the above method may further include the following steps:

[0059] Step B1: Obtain a second historical power generation amount of the plurality of piezoelectric units within a second historical unit time period.

[0060] Among them, the second historical unit period is the period when the working face is in a pressure state.

[0061] Exemplarily, the total amount of power generated by all piezoelectric units in all second historical unit time periods is obtained as the second historical power generation.

[0062] Step B2: Obtain the ratio between the first historical power generation and the second historical power generation as the first pressure level of the working face.

[0063] Exemplarily, the above steps can be expressed as follows:

[0064] K=Q1 / Q2

[0065] Among them, K is the first voltage level, Q1 is the second historical power generation during the voltage period, and Q2 is the first historical power generation during the non-voltage period.

[0066] In some embodiments, if it is determined that the working surface in the current unit time period is in a non-pressure state, the first power generation can be used as part of the first historical power generation; if it is determined that the working surface in the current unit time period is in a pressure state, the first power generation can be used as part of the second historical power generation.

[0067] In some embodiments, the above method further includes: determining that the working surface is in a pressure state within a unit time period, and obtaining a ratio between the first power generation and the power generation threshold as a second pressure level within the unit time period.

[0068] Exemplarily, it is determined that the working face is in a pressure state within a unit time period, and the ratio obtained by dividing the first power generation by the power generation threshold is used as the second pressure level of the unit time period.

[0069] In some embodiments, the above method may further include: storing the electricity generated by the plurality of piezoelectric units.

[0070] For example, the piezoelectric unit may be connected to an energy storage device to store the electricity generated by the plurality of piezoelectric units.

[0071] As an example, see Figure 2 and Figure 3 , Figure 2 is a cross-sectional schematic diagram of the arrangement position of the piezoelectric material provided in the embodiment of the present application, Figure 3 Schematic diagram of the arrangement of piezoelectric materials provided in the embodiment of the present application. Figure 2 and Figure 3 As shown, the mining face has a dip length of 160 meters, with mining lanes consisting of a transport lane and a return air lane. Twenty-five hydraulic supports 1 are deployed within the working face. Piezoelectric materials 2 are installed at the contact point between each hydraulic support and the roof support. During continuous mining, as the coal seam 3 is mined, the hydraulic supports follow the working face and are moved and raised, causing the roof 4 to periodically fracture and collapse. During this energy release from the coal and rock mass, the captured mechanical energy is converted into electrical energy by the power generation materials and stored for utilization.

[0072] See Figure 4 , Figure 4 This is a schematic diagram of the structure of a working surface periodic pressure monitoring device provided in an embodiment of the present application. Figure 4 As shown, the device 400 includes: an acquisition module 401, used to obtain the first power generation of each piezoelectric unit in a plurality of piezoelectric units within a unit time period; wherein different piezoelectric units are arranged at the contact parts between different roof support equipment and the working face roof; a first processing module 402, used to determine a target piezoelectric unit among the plurality of piezoelectric units based on the first power generation; wherein the first power generation of the target piezoelectric unit is greater than or equal to a preset power generation threshold; a second processing module 403, used to obtain a first device quantity of the roof support equipment corresponding to the target piezoelectric unit; a third processing module 404, used to determine whether the working face is in a pressure state based on the quantitative relationship between the first device quantity and the total device quantity of the roof support equipment.

[0073] In one implementation, the power generation threshold is obtained by the following steps: obtaining the first historical power generation and the number of the first historical unit time period of multiple piezoelectric units; wherein the first historical unit time period is a time period when the working surface is not in a pressure-receiving state; based on the first historical power generation and the number of the first historical unit time period, obtaining the average value of the first historical power generation as the power generation threshold.

[0074] In one implementation, the apparatus further includes a fourth processing module. As an example, see Figure 5 , Figure 5 This is a schematic diagram of the structure of another working surface periodic pressure monitoring device provided in the embodiment of the present application. Figure 5 As shown, the device 500 further includes a fourth processing module 505 for obtaining a second historical power generation of the plurality of piezoelectric units in a second historical unit period; wherein the second historical unit period is a period when the working surface is in a pressure-incoming state; and obtaining a ratio between the first historical power generation and the second historical power generation as a first pressure-incoming level of the working surface. Figure 5 Modules 501 to 504 in Figure 4 Modules 401 to 404 have the same structure and function.

[0075] In one implementation, the first processing module 402 may also be used to determine whether the roof support device corresponding to the target piezoelectric unit is in a pressure-incoming state.

[0076] In one implementation, the apparatus further includes a fifth processing module. As an example, see Figure 6 , Figure 6 This is a structural diagram of another working surface periodic pressure monitoring device provided in the embodiment of the present application. Figure 6 As shown, the device 600 further includes a fifth processing module 605 for determining whether the working face is in a pressure state within a unit time period, and obtaining a ratio between the first power generation and the power generation threshold as a second pressure level within the unit time period. Figure 6 Modules 601 to 604 in Figure 4 Modules 401 to 404 have the same structure and function.

[0077] In one implementation, the above device further includes an energy storage module. As an example, see Figure 7 , Figure 7 This is a structural diagram of another working surface periodic pressure monitoring device provided in the embodiment of the present application. Figure 7 As shown, the device 700 further includes an energy storage module 705 for storing the electricity generated by the plurality of piezoelectric units. Figure 7 Modules 701 to 704 in Figure 4 Modules 401 to 404 have the same structure and function.

[0078] Through the device of the embodiment of the present application, the power generation of the piezoelectric unit set at the contact part between the roof support equipment and the working face roof in a unit time period can be obtained, so as to determine the target piezoelectric unit according to the power generation of each piezoelectric unit, and thus determine whether the working face is in a pressure state according to the quantitative relationship between the number of target piezoelectric units and the total number of roof support equipment.

[0079] It should be noted that the above explanation of the embodiment of the working face periodic pressure monitoring method is also applicable to the working face periodic pressure monitoring device of this embodiment, and will not be repeated here.

[0080] In order to implement the above embodiment, the present application also proposes an electronic device. Figure 8 , Figure 8 Schematic diagram of the structure of the electronic device provided in the embodiment of the present application. Figure 8 As shown, the electronic device 800 includes: a processor 801, and a memory 802 communicatively connected to the processor 801; the memory 802 stores computer-executable instructions; the processor 801 executes the computer-executable instructions stored in the memory to implement the method provided in the aforementioned embodiment.

[0081] In order to implement the above embodiments, the present application also proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods provided in the above embodiments.

[0082] In order to implement the above embodiments, the present application also proposes a computer program product, including a computer program, which implements the methods provided by the above embodiments when executed by a processor.

[0083] In the description of this application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a way to describe the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0084] In the descriptions of the foregoing embodiments, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are mutually inconsistent.

[0085] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0086] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0087] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0088] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0089] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0090] In addition, the functional units in the various embodiments of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into a module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0091] The storage medium mentioned above may be a read-only memory, a magnetic disk, or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application. Persons skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A method for monitoring periodic pressure on a working face, characterized in that: include: Obtaining a first power generation amount of each of the plurality of piezoelectric units within a unit time period; wherein different piezoelectric units are arranged at contact locations between different roof support devices and the roof of the working face; determining a target piezoelectric unit among the plurality of piezoelectric units based on the first power generation amount; wherein the first power generation amount of the target piezoelectric unit is greater than or equal to a preset power generation amount threshold; Obtaining a first device quantity of the roof support device corresponding to the target piezoelectric unit; Based on the quantitative relationship between the first equipment quantity and the total equipment quantity of the roof support equipment, it is determined whether the working face is in a pressure state.

2. The method according to claim 1, wherein The power generation threshold is obtained by the following steps: Obtaining a first historical power generation amount of the plurality of piezoelectric units in a first historical unit time period and the number of the first historical unit time period; wherein the first historical unit time period is a time period during which the working surface is not in a pressure-applying state; Based on the first historical power generation and the number of the first historical unit time periods, an average value of the first historical power generation is obtained as the power generation threshold.

3. The method according to claim 2, wherein The method further comprises: Acquire a second historical power generation amount of the plurality of piezoelectric units in a second historical unit time period; wherein the second historical unit time period is a time period when the working surface is in a pressure-appearing state; A ratio between the first historical power generation and the second historical power generation is obtained as a first incoming pressure level of the working face.

4. The method according to claim 1, wherein The method further comprises: Determine whether the roof support equipment corresponding to the target piezoelectric unit is in a pressure-incoming state.

5. The method according to claim 1, wherein The method further comprises: It is determined that the working face is in a pressure state within the unit time period, and a ratio between the first power generation and the power generation threshold is obtained as a second pressure level within the unit time period.

6. The method according to any one of claims 1 to 5, wherein The method further comprises: The electricity generated by the plurality of piezoelectric units is stored.

7. A working face periodic pressure monitoring device, characterized in that: include: an acquisition module, configured to acquire a first power generation amount of each of the plurality of piezoelectric units within a unit time period; wherein different piezoelectric units are arranged at contact locations between different roof support devices and the roof of the working face; a first processing module, configured to determine a target piezoelectric unit among the plurality of piezoelectric units based on the first power generation; wherein the first power generation of the target piezoelectric unit is greater than or equal to a preset power generation threshold; A second processing module is used to obtain a first device quantity of the roof supporting device corresponding to the target piezoelectric unit; The third processing module is used to determine whether the working face is in a pressure state based on the quantitative relationship between the number of the first equipment and the total number of the roof support equipment.

8. An electronic device, characterized in that: include: a processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 6 when executed by a processor.

10. A computer program product, characterized in that The invention comprises a computer program, which implements the method according to any one of claims 1 to 6 when being executed by a processor.

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