A method and device for early warning of roof water damage in coal mining working face

Abstract

The present invention proposes a method and equipment for early warning of water hazards in the roof of a coal mining working face. The method clearly divides the types of water hazards affected by the structure at different periods, and the early warning method is simple to implement. The early warning credibility is higher when combined in time and space. It is applied to early warning of water hazards before mining in high-intensity mining working faces, and can effectively prevent the occurrence of water disasters. Moreover, under the general trend of intelligent construction of coal mines in my country, intelligent early warning models for mines threatened by water hazards are more important. The method can be used as an early warning method for intelligent prevention and control of water hazards, and is of great significance to the safe and efficient production of coal mines.

Description

Technical Field

[0001] The present invention relates to the field of coal mine safety technology, and in particular to a method, device, computer equipment and storage medium for early warning of water damage on a roof of a coal mine working face. Background Art

[0002] The high-intensity mining of coal mine working faces results in severe overburden damage and working face pressure. The degree of water hazard threat and the identification method vary greatly in different mining periods and under the influence of structures. At present, water inrush accidents have occurred in many working faces in the early stages of mining in China, and many water inrush disasters have occurred at different times under the influence of fold structures. Water inrush accidents are usually related to multiple factors such as coal mining methods, mining intensity, water-richness of aquifers, characteristics of aquicludes, bedrock thickness, and structural development characteristics. Due to the failure to establish an effective water hazard early warning method, water hazards cannot be prevented and controlled in a timely and accurate manner, resulting in flooding of wells and faces, and even casualties.

[0003] The existing technology basically starts from the development characteristics of cracks caused by overburden mining, analyzes the positional relationship between the water-conducting channel and the aquifer, and then analyzes the factors of mine water filling and predicts the water damage to the aquifer. The above prediction of water damage does not take into account the factors of the initial breakage and periodic breakage of the old roof of the working face, nor does it classify the types of water damage affected by the structure at different periods. At present, the monitoring of the water level of the aquifer does not play a warning role. Most of the time, the water source layer is determined based on the monitoring situation after the mine water inrush occurs. Summary of the invention

[0004] The present invention provides a method, device, computer equipment and storage medium for early warning of water damage on the roof of a coal mining working face, which are intended to be used for early warning of water damage before mining of a high-intensity mining working face, so as to effectively prevent the occurrence of water damage accidents.

[0005] To this end, the first object of the present invention is to provide a coal mining working face roof water hazard early warning method, comprising:

[0006] According to the mining stage and the influence of fold structure on the mining face of coal mining, the working face is divided in time and space;

[0007] By analyzing geological materials, evaluating the thickness of bedrock from high-intensity mining coal seams to aquifers, the degree of mining rock damage and structural impact, the vertical water hazard threat zone is divided;

[0008] According to the law of mine pressure in the recovery stage of high-intensity mining working face and its relationship with mine pressure, the degree of water threat is evaluated and the key areas of water threat in the horizontal direction are divided;

[0009] Combined with the vertical and horizontal division of key water hazard threat areas, a comprehensive evaluation of water hazard threat areas is conducted to achieve spatiotemporal water inrush warning during high-intensity mining, and determine the warning range.

[0010] Among them, in the step of dividing the working face in time and space, the working face is divided into the first mining face of the mine or mining area without structural influence area, the initial syncline structure influence area of ​​non-first mining face mining and the mid-term anticline structure influence area of ​​non-first mining face mining according to whether the mining planning time and geological space are affected by fold structures.

[0011] Among them, the vertical division of water threat areas is based on the thickness of bedrock above the working face, the water-richness of the aquifer, the characteristics of the impermeable layer, the degree of impact of high-intensity mining and the conditions affected by the fold structure. The vertical relationship between various factors is compared and analyzed, the water hazard characteristics under different states are classified, and a vertical water hazard early warning identification method is established. The water threat early warning areas are divided; among them, the anticline structure takes into account the development range of structural fractures in the effective impermeable layer under the aquifer.

[0012] Among them, the division of key areas of horizontal water hazard threat is to obtain the law of mine pressure manifestation in high-intensity mining working faces through theoretical analysis or on-site measurement. According to the characteristics of mine pressure and the relationship between overburden damage and mine pressure, the first mining working face of the mine or mining area is located at L c ~L c +2L z The area is divided into the key area for horizontal water disaster warning. The initial mining of non-first mining face is affected by the syncline structure and the syncline axis passes through L c ~L c +2L z When the area is c ~L c +2L z The area is divided into the key areas for horizontal water disaster warning, and the non-first mining face mining mid-term is L c +2L z The affected area where the axis of the anticline structure is perpendicular or oblique to the working face is the key area for horizontal water hazard warning;

[0013] Where, L is the length of the working face, L c The step distance for the first time of pressing the old top is 30 to 50m, L z The step distance for the old top cycle is 10 to 30m.

[0014] Among them, when the mine or the first mining face of the mining area is threatened by the medium or higher strength aquifer in the roof without structural influence area, the roof water hazard warning area is H ji <K li M+P / I0 and L c ≤L≤L c +2L z, that is, the water level of the aquifer is monitored in real time through the hydrological monitoring system. When P = (H ji -K li M)I0 and L c ≤L≤L c +2L z When the alarm starts,

[0015] Among them, H ji K is the distance from the mining coal seam to the roof aquifer. li is the crack mining ratio of the roof destruction of the high-intensity mining working face, M is the mining thickness of the coal seam, P is the pore water pressure of the aquifer, I0 is the effective impermeable layer coefficient, which is generally 0.06~0.1, and is selected according to whether there is a mudstone impermeable layer of stable thickness under the aquifer and its impermeable performance.

[0016] Among them, when the mine or the first mining face of the mining area has no structural influence area and is threatened by the weak aquifer on the roof, the roof water hazard warning area is H ji <K li M and L c ≤L≤L c +2L z .

[0017] Among them, when the syncline structure influence area of ​​the non-first mining face is threatened by the roof aquifer, the water hazard warning area is H ji <K li M+P / I0 and located at L c ~L c +2L z Within the range, that is, the water level of the aquifer is monitored in real time through the hydrological monitoring system. When P = (H ji -K li M)I0 and located in L c ~L c +2L z When it is within range, an early warning will be initiated.

[0018] Among them, according to the geological drilling structure observation data, the impact area of ​​the anticline structure in the mid-term mining of the non-first mining face was fitted to form a two-dimensional structural surface. By calculating the curvature of different points, the fracture range of the stable impermeable layer under the anticline structure aquifer was delineated as follows: When the anticline structure affected area in the middle stage of non-first mining face mining is threatened by the medium or higher strength aquifer in the roof, the water hazard warning area is And L>L c +2L z Within the scope, that is, the water level of the aquifer is monitored in real time through the hydrological monitoring system. And L>L c +2L zWhen it is within the range, the warning is started; where h is the thickness of the effective impermeable layer under the aquifer, σt is the tensile strength of the effective impermeable layer under the aquifer, K(x,y) is the curvature of the two-dimensional structural surface, and E is the elastic modulus of the impermeable layer rock.

[0019] Among them, when the anticline structure affected area in the middle stage of non-first mining face is threatened by the weak aquifer on the roof, the water hazard warning area is And L>L c +2L z within the range.

[0020] The second object of the present invention is to provide a coal mining working face roof water hazard early warning device, comprising:

[0021] The working face division module is used to divide the working face in time and space according to the mining stage and the influence of fold structure on the mining of coal mining working face;

[0022] The module for dividing key areas of water hazard threat in the horizontal direction is used to divide the water hazard threat areas in the vertical direction by analyzing geological materials, evaluating the bedrock thickness from the high-intensity mining coal seam to the aquifer, the degree of mining rock damage and the degree of structural impact;

[0023] The vertical water hazard threat key area division module is used to evaluate the degree of water hazard threat and divide the horizontal water hazard threat key areas according to the mine pressure law and its relationship with mine pressure in the recovery stage of high-intensity mining working faces;

[0024] The early warning module is used to divide the key areas of water threat in the vertical and horizontal directions, conduct a comprehensive evaluation of the water threat areas, realize the spatiotemporal water inrush early warning during high-intensity mining, and determine the warning range.

[0025] The third object of the present invention is to provide a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method of the aforementioned technical solution is implemented.

[0026] The fourth object of the present invention is to provide a non-temporary computer-readable storage medium having a computer program stored thereon, which implements the method of the aforementioned technical solution when the computer program is executed by a processor.

[0027] Different from the prior art, the coal mine mining face roof water hazard early warning method provided by the present invention clearly divides the water hazard types affected by the structure in different periods, the early warning method is simple to implement, and the early warning credibility is higher due to the combination of time and space. It is applied to water hazard early warning before mining in high-intensity mining faces, which can effectively prevent the occurrence of water hazard accidents. Moreover, under the general trend of intelligent coal mine construction in my country, the intelligent early warning model of mines threatened by water hazard is more important. This method can be used as an early warning method for intelligent prevention and control of water hazard, which is of great significance to the safe and efficient production of coal mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention and / or additional aspects and advantages will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0029] Figure 1 The present invention provides a flow chart of a method for early warning of water hazards on the roof of a coal mining working face.

[0030] Figure 2 It is a schematic diagram of the division of warning areas when the non-structurally influenced area of ​​the first mining face of a mine or a mining area is threatened by a medium or higher strength aquifer on the roof in a method for warning water hazards on the roof of a coal mining working face provided by the present invention.

[0031] Figure 3 It is a schematic diagram of the division of warning areas when the syncline structure influence area of ​​the non-first mining face in the initial stage of mining is threatened by the roof aquifer in a coal mining working face roof water hazard warning method provided by the present invention.

[0032] Figure 4 It is a schematic cross-sectional diagram of an anticline structure influence zone in the middle stage of non-first mining face mining in a coal mining working face roof water hazard early warning method provided by the present invention.

[0033] Figure 5 It is a schematic diagram of the division of warning areas when the anticline structure influence area of ​​the non-first mining face in the middle stage of mining is threatened by the weak aquifer on the roof in a coal mining working face roof water hazard warning method provided by the present invention.

[0034] Figure 6 The present invention is a schematic structural diagram of a coal mine working face roof water hazard early warning device.

[0035] Figure 7 It is a structural schematic diagram of a non-temporary computer-readable storage medium provided by the present invention. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, 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 invention, and should not be construed as limiting the present invention.

[0037] Figure 1 The present invention provides a method for early warning of roof water damage in a coal mining working face. The method comprises the following steps:

[0038] Step 101, dividing the working face in time and space according to the mining stage and the influence of the fold structure on the mining of the coal mining working face.

[0039] According to whether the mining planning time and geological space are affected by fold structures, the working face is divided into the first mining face of the mine or mining area without structural influence, the initial syncline structure influence zone of non-first mining face mining, and the mid-term anticline structure influence zone of non-first mining face mining.

[0040] Step 102, by analyzing geological materials, evaluating the bedrock thickness from the high-intensity mining coal seam to the aquifer, the degree of mining-induced rock stratum damage and the degree of structural impact, and dividing the vertical water hazard threat area.

[0041] The vertical division of water threat areas is based on the thickness of bedrock above the working face, the water-richness of the aquifer, the characteristics of the impermeable layer, the degree of impact of high-intensity mining and the conditions affected by the fold structure. The vertical relationship between the factors is compared and analyzed, the water hazard characteristics under different states are classified, and a vertical water hazard early warning identification method is established. The water threat early warning areas are divided; among them, the anticline structure takes into account the development range of structural fractures in the effective impermeable layer under the aquifer.

[0042] Step 103, based on the mine pressure law in the high-intensity mining working face during the mining phase and its relationship with the mine pressure, evaluate the degree of water threat and divide the key areas of water threat in the horizontal direction.

[0043] The key areas of horizontal water hazard threat are divided by theoretical analysis or field measurement to obtain the law of mine pressure manifestation in high-intensity mining working faces. According to the characteristics of mine pressure and the relationship between overburden damage and mine pressure, the first mining working face of the mine or mining area is located at L c ~L c +2L z The area is divided into the key area for horizontal water disaster warning. The initial mining of non-first mining face is affected by the syncline structure and the syncline axis passes through L c ~L c +2L z When the area is c ~L c +2L zThe area is divided into the key areas for horizontal water disaster warning, and the non-first mining face mining mid-term is L c +2L z The affected area where the axis of the anticline structure is perpendicular or oblique to the working face is the key area for horizontal water hazard warning;

[0044] Where, L is the length of the working face, L c The step distance for the first time of pressing the old top is 30 to 50m, L z The step distance for the old top cycle is 10 to 30m.

[0045] Step 104, combining the vertical and horizontal water hazard threat key area division, comprehensively evaluating the water hazard threat area, realizing the spatiotemporal water inrush warning of high-intensity mining, and determining the warning range.

[0046] like Figure 2 As shown in the figure, when the mine or the first mining face of the mining area is threatened by the medium or higher strength aquifer in the roof without structural influence, the roof water hazard warning area is H ji <K li M+P / I0 and L c ≤L≤L c +2L z , that is, the water level of the aquifer is monitored in real time through the hydrological monitoring system. When P = (H ji -K li M)I0 and L c ≤L≤L c +2L z When the alarm starts,

[0047] Among them, H ji K is the distance from the mining coal seam to the roof aquifer. li is the crack mining ratio of the roof destruction of the high-intensity mining working face, M is the mining thickness of the coal seam, P is the pore water pressure of the aquifer, I0 is the effective impermeable layer coefficient, which is generally 0.06-0.1. It is selected according to whether there is a mudstone impermeable layer of stable thickness under the aquifer and its impermeable performance. It has strong impermeability and undeveloped cracks. In the embodiment of the present invention, I0 is 0.1.

[0048] When the mine or the first mining face of the mining area has no structural influence area and is threatened by the weak aquifer in the roof, the roof water hazard warning area is H ji <K li M and L c ≤L≤L c +2L z .

[0049] like Figure 3 As shown, in another embodiment of the present invention, when the syncline structure influence area of ​​the non-first mining face is threatened by the roof aquifer, the water hazard warning area is H ji <K liM+P / I0 and located at L c ~L c +2L z Within the range, that is, the water level of the aquifer is monitored in real time through the hydrological monitoring system. When P = 0.1 (H ji -K li M) and located in L c ~L c +2L z When it is within range, an early warning will be initiated.

[0050] like Figure 4 As shown in the figure, based on the geological drilling structure observation data, the impact area of ​​the anticline structure in the mid-term mining of the non-first mining face is fitted to form a two-dimensional structural surface. By calculating the curvature of different points, the fracture range of the stable impermeable layer under the anticline structure aquifer is delineated as follows: When the anticline structure affected area in the middle stage of non-first mining face mining is threatened by the medium or higher strength aquifer in the roof, the water hazard warning area is And L>L c +2L z Within the scope, that is, the water level of the aquifer is monitored in real time through the hydrological monitoring system. And L>L c +2L z When it is within the range, the warning is started; where h is the thickness of the effective impermeable layer under the aquifer, σt is the tensile strength of the effective impermeable layer under the aquifer, K(x,y) is the curvature of the two-dimensional structural surface, and E is the elastic modulus of the impermeable layer rock.

[0051] like Figure 5 As shown in the figure, when the anticline structure affected area in the middle stage of non-first mining face is threatened by the weak aquifer on the roof, the water hazard warning area is And L>L c +2L z within the range.

[0052] In order to implement the embodiment, the present invention also proposes a coal mining working face roof water hazard early warning, such as Figure 6 As shown, including:

[0053] The working face division module 310 is used to divide the working face in time and space according to the mining stage and the influence of the fold structure on the mining of the coal mining working face;

[0054] The horizontal water hazard threat key area division module 320 is used to divide the vertical water hazard threat area by analyzing geological materials, evaluating the bedrock thickness from the high-intensity mining coal seam to the aquifer, the degree of mining rock layer damage and the degree of structural impact;

[0055] A vertical water hazard threat key area division module 330 is used to evaluate the degree of water hazard threat and divide the horizontal water hazard threat key areas according to the mine pressure law and its relationship with the mine pressure in the recovery stage of the high-intensity mining working face;

[0056] The early warning module 340 is used to divide the key water hazard threat areas in the vertical and horizontal directions, conduct a comprehensive evaluation of the water hazard threat areas, realize the spatiotemporal water inrush early warning of high-intensity mining, and determine the early warning range.

[0057] In order to implement the described embodiment, the present invention also proposes another computer device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the working face roof water hazard warning as described in the embodiment of the present invention.

[0058] like Figure 7 As shown, the non-transitory computer-readable storage medium includes a memory 810 of instructions and an interface 830, and the instructions can be executed by a processor 820 according to the working face roof water hazard warning device to complete the method. Optionally, the storage medium can be a non-transitory computer-readable storage medium, for example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a tape, a floppy disk, an optical data storage device, etc.

[0059] In order to implement the embodiment, the present invention also proposes a non-temporary computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it realizes the working face roof water hazard warning as in the embodiment of the present invention.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means 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 invention. In this specification, the schematic representation of the terms does 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, without contradiction.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] 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 invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0063] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, 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 in other suitable ways if necessary, and then stored in a computer memory.

[0064] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the described embodiment, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0065] A person skilled in the art may understand that all or part of the steps of implementing the method of the embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0066] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The 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.

[0067] 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 invention have been shown and described above, it can be understood that the embodiments are exemplary and cannot be construed as limiting the present invention. A person of ordinary skill in the art may change, modify, replace and modify the embodiments within the scope of the present invention.

Claims

1. A method for early warning of roof water damage in a coal mining working face, characterized in that: include: According to the mining stage and the influence of fold structure on the mining face of coal mining, the working face is divided in time and space, wherein: in the step of dividing the working face in time and space, according to whether the mining planning time and geological space are affected by the fold structure, the working face is divided into the first mining face of the mine or mining area without structural influence area, the initial syncline structural influence area of ​​non-first mining face mining and the mid-term anticline structural influence area of ​​non-first mining face mining; By analyzing geological materials, evaluating the thickness of bedrock from high-intensity mining coal seams to aquifers, the degree of mining rock damage and structural impact, the vertical water hazard threat zone is divided; According to the law of mine pressure in the recovery stage of high-intensity mining working face and its relationship with mine pressure, the degree of water threat is evaluated and the key areas of water threat in the horizontal direction are divided; Combine the vertical and horizontal water threat key areas, conduct a comprehensive evaluation of the water threat areas, achieve high-intensity mining time and space water inrush warning, and determine the warning range; The key areas of horizontal water hazard threat are divided by theoretical analysis or field measurement to obtain the law of mine pressure manifestation in high-intensity mining working faces. According to the characteristics of mine pressure and the relationship between overburden damage and mine pressure, the first mining working face of the mine or mining area is located at L c ~L c +2L z The area is divided into the key area for horizontal water disaster warning. The initial mining of non-first mining face is affected by the syncline structure and the syncline axis passes through L c ~L c +2L z When the area is c ~L c +2L z The area is divided into the key areas for horizontal water disaster warning, and the non-first mining face mining mid-term is L c +2L z The affected area where the axis of the anticline structure is perpendicular or oblique to the working face is the key area for horizontal water hazard warning; Where, L is the length of the working face, L c The step distance for the first time of pressing the old top is 30 to 50m, L z The step distance for the old top cycle is 10 to 30m; When the mine or the first mining face of the mining area is threatened by the medium or higher strength aquifer in the roof without structural influence, the roof water hazard warning area is H ji <K li M+P / I0 and L c ≤L≤L c +2L z , that is, the water level of the aquifer is monitored in real time through the hydrological monitoring system. When P = (H ji -K li M)I0 and L c ≤L≤L c +2L z When the alarm starts, Among them, H ji K is the distance from the mining coal seam to the roof aquifer. li is the crack mining ratio of the roof destruction of the high-intensity mining working face, M is the mining thickness of the coal seam, P is the pore water pressure of the aquifer, I0 is the effective aquiclude coefficient, and the effective aquiclude coefficient ranges from 0.06 to 0.

1. The effective aquiclude coefficient is determined based on whether there is a mudstone aquiclude of stable thickness under the aquifer and its waterproof performance.

2. The method for early warning of roof water damage in a coal mining working face according to claim 1, characterized in that: The vertical division of water threat areas is based on the thickness of bedrock above the working face, the water-richness of the aquifer, the characteristics of the aquiclude, the degree of impact of high-intensity mining and the conditions affected by the fold structure. The vertical relationship between the factors is compared and analyzed, the water hazard characteristics under different states are classified, a vertical water hazard early warning identification method is established, and the water threat early warning areas are divided; among them, the anticline structure takes into account the development range of structural fractures in the effective aquiclude under the aquifer.

3. The method for early warning of roof water damage in coal mining working face according to claim 1, characterized in that: When the mine or the first mining face of the mining area has no structural influence area and is threatened by the weak aquifer in the roof, the roof water hazard warning area is H ji <K li M and L c ≤L≤L c +2L z .

4. The method for early warning of roof water damage in a coal mining working face according to claim 1, characterized in that: When the syncline structure influence area of ​​the non-first mining face is threatened by the roof aquifer, the water hazard warning area is H ji <K li M+P / I0 and located at L c ~L c +2L z Within the range, that is, the water level of the aquifer is monitored in real time through the hydrological monitoring system. When P = (H ji -K li M)I0 and located in L c ~L c +2L z When it is within range, an early warning will be initiated.

5. The method for early warning of roof water damage in coal mining working face according to claim 1, characterized in that: According to the geological drilling structure observation data, the impact area of ​​the anticline structure in the mid-term mining of the non-first mining face was fitted to form a two-dimensional structural surface. By calculating the curvature of different points, the fracture range of the stable impermeable layer under the anticline structure aquifer was delineated as follows: When the anticline structure influence area in the middle stage of non-first mining face mining is threatened by the medium or higher strength aquifer in the roof, the water hazard warning area is and L>L c +2L z Within the scope, that is, the water level of the aquifer is monitored in real time through the hydrological monitoring system. And L>L c +2L z When the range is reached, the warning starts; where h is the thickness of the effective aquifer under the aquifer, σ t is the tensile strength of the effective impermeable layer under the aquifer, K(x,y) is the curvature of the two-dimensional structural surface, and E is the elastic modulus of the impermeable layer rock.

6. The method for early warning of roof water damage in a coal mining working face according to claim 1, characterized in that: When the anticline structure-affected area in the middle stage of non-first mining face mining is threatened by the weak aquifer on the roof, the water hazard warning area is And L>L c +2L z within the range.

7. A coal mining working face roof water hazard early warning device, characterized in that: include: The working face division module is used to divide the working face in time and space according to the mining stage and the influence of the fold structure on the mining of the coal mining working face, wherein: in the step of dividing the working face in time and space, the working face is divided into the first mining face of the mine or mining area without structural influence area, the initial syncline structural influence area of ​​the non-first mining face mining and the mid-term anticline structural influence area of ​​the non-first mining face mining according to whether the mining planning time and geological space are affected by the fold structure; The module for dividing key areas of water hazard threat in the horizontal direction is used to divide the water hazard threat areas in the vertical direction by analyzing geological materials, evaluating the bedrock thickness from the high-intensity mining coal seam to the aquifer, the degree of mining rock damage and the degree of structural impact; The vertical water hazard threat key area division module is used to evaluate the degree of water hazard threat and divide the horizontal water hazard threat key areas according to the mine pressure law and its relationship with mine pressure in the recovery stage of high-intensity mining working faces; The early warning module is used to divide the key water hazard threat areas in the vertical and horizontal directions, conduct a comprehensive evaluation of the water hazard threat areas, realize the spatiotemporal water inrush early warning of high-intensity mining, and determine the early warning range; The key areas of horizontal water hazard threat are divided by theoretical analysis or field measurement to obtain the law of mine pressure manifestation in high-intensity mining working faces. According to the characteristics of mine pressure and the relationship between overburden damage and mine pressure, the first mining working face of the mine or mining area is located at L c ~L c +2L z The area is divided into the key area for horizontal water disaster warning. The initial mining of non-first mining face is affected by the syncline structure and the syncline axis passes through L c ~L c +2L z When the area is c ~L c +2L z The area is divided into the key areas for horizontal water disaster warning, and the non-first mining face mining mid-term is L c +2L z The affected area where the axis of the anticline structure is perpendicular or oblique to the working face is the key area for horizontal water hazard warning; Where, L is the length of the working face, L c The step distance for the first time of pressing the old top is 30 to 50m, L z The step distance for the old top cycle is 10 to 30m; When the mine or the first mining face of the mining area is threatened by the medium or higher strength aquifer in the roof without structural influence, the roof water hazard warning area is H ji <K li M+P / I0 and L c ≤L≤L c +2L z , that is, the water level of the aquifer is monitored in real time through the hydrological monitoring system. When P = (H ji -K li M)I0 and L c ≤L≤L c +2L z When the alarm starts, Among them, H ji K is the distance from the mining coal seam to the roof aquifer. li is the crack mining ratio of the roof destruction of the high-intensity mining working face, M is the mining thickness of the coal seam, P is the pore water pressure of the aquifer, I0 is the effective aquiclude coefficient, and the effective aquiclude coefficient ranges from 0.06 to 0.

1. The effective aquiclude coefficient is determined based on whether there is a mudstone aquiclude of stable thickness under the aquifer and its waterproof performance.

8. A computer device, characterized in that: The method comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method according to any one of claims 1 to 6 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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