Double-dip-angle working face instability danger area division method, storage medium and electronic device

Abstract

The invention provides a double-dip-angle working face instability danger area dividing method, a storage medium and an electronic device, the dividing method comprises the steps that a critical value of toppling of supporting equipment is acquired, and the critical value comprises a first dip angle and a first trend angle; acquiring an actual measurement angle of the working face, wherein the actual measurement angle comprises a second inclination angle and a second trend angle; when it is judged that the second inclination angle is larger than the first inclination angle, the area is marked as a dangerous area; or when it is judged that the second strike angle is larger than the first strike angle, the area is marked as the danger area; by means of the technical scheme, the problem that in the prior art, design only aims at a single-direction inclined coal seam, and the development requirement of a double-dip-angle working face is difficult to effectively meet is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mining, and in particular to a method for dividing an instability danger zone of a double-inclination working face, a storage medium and an electronic device. Background Art

[0002] As an important part of the energy industry, the safety and efficiency of coal mining directly affect the country's energy supply and economic development. In the process of coal mining, the design and layout of the working face are key links to ensure mining safety and improve mining efficiency. Traditional coal working face mining usually assumes that the direction of the coal seam strike and dip is relatively stable, that is, the working face is arranged roughly along the coal seam strike, and the mining direction is perpendicular to the strike, that is, it advances along the dip of the coal seam.

[0003] However, under complex geological conditions, such as stratum folds and syncline structures, coal working faces often face a "double dip" situation where both the strike and dip directions are significantly tilted. In this case, both the strike and dip directions of the coal seam may form large dips, causing the working face to adapt to both the circumferential pitch (changes in the dip angle in the strike direction) and the large dip angle changes during the mining process, bringing unprecedented challenges to mining operations.

[0004] Existing face mining technologies, such as traditional longwall mining, are mainly designed for single-direction inclined coal seams and are difficult to effectively meet the mining needs of "double-angle" face mining. Under "double-angle" conditions, the existing support systems, coal mining equipment and mining strategies may not ensure the stability of the face and the safety of personnel, and the mining efficiency and resource recovery rate will also be affected.

[0005] Specifically, the problems faced by existing technologies in "double-angle" working face mining include:

[0006] Increased support difficulty: The significant inclination of the coal seam in the strike and dip directions increases the complexity of the support system design for the working face. Traditional support methods may not be able to effectively support the working face, resulting in the risk of support instability.

[0007] Poor equipment adaptability: Existing coal mining equipment and transportation systems are mainly designed to adapt to coal seams inclined in a single direction. It is difficult to flexibly adjust to meet the mining needs of "double-angle" working faces, resulting in low equipment utilization efficiency.

[0008] Reduced mining efficiency: During the mining process of the "double-angle" working face under complex geological conditions, it may be necessary to frequently adjust the mining plan and equipment layout, which increases the uncertainty and cost of the mining operation and also reduces mining efficiency.

[0009] Safety hazards: The dual-inclination characteristics of coal seams increase the instability of the working face and the risks during mining, such as sudden collapse of coal walls and roofs, posing major challenges to mine safety. Summary of the invention

[0010] The main purpose of the present invention is to provide a method for dividing the instability danger zone of a dual-angle working face, a storage medium and an electronic device, so as to solve the problem that the prior art only designs inclined coal seams in a single direction and is difficult to effectively meet the development needs of dual-angle working faces.

[0011] In order to achieve the above-mentioned object, according to one aspect of the present invention, a method for dividing the instability danger zone of a dual-inclination working face is provided. The division method is implemented based on support equipment. During the mining process of the working face, the support equipment is used to support the roof to prevent the roof of the tunnel or goaf from collapsing, so as to ensure the safety and stability of the working face. The roof is the coal seam or rock part above the working face. The division method includes:

[0012] Obtaining a critical value of the collapse of the supporting equipment, the critical value including a first inclination angle and a first strike angle;

[0013] Obtaining the measured angle of the working face, the measured angle including the second inclination angle and the second strike angle;

[0014] When it is determined that the second inclination angle is greater than the first inclination angle, the area is marked as a dangerous area; or,

[0015] When it is determined that the second strike angle is greater than the first strike angle, the area is marked as a danger zone.

[0016] Furthermore, the critical value of the collapse of the supporting equipment is obtained, including:

[0017] Construct mechanical analysis models;

[0018] Constructing a first instability mechanical model, where the first instability mechanical model is an instability mechanical model constructed when the support equipment is in a moving state;

[0019] Constructing a second instability mechanical model, where the second instability mechanical model is an instability mechanical model constructed when the support equipment is in a tilted state;

[0020] According to the mechanical analysis model, the first instability mechanical model and the second instability mechanical model, the critical value of the collapse of the support equipment is calculated.

[0021] Furthermore, a mechanical analysis model is constructed, including:

[0022] Obtain the first parameter, which includes obtaining the elevation angle or depression angle α of the working face, obtaining the inclination angle β of the working face, and obtaining the angle between the gravity G of the support equipment along the working face and the inclination direction of the working face. And obtain the angle θ between the plane where the working surface is located and the horizontal plane;

[0023] According to the first parameter, a mechanical analysis model is constructed, and the formula of the mechanical analysis model is:

[0024]

[0025] Where: G1 represents the component force of the support equipment along the working face arrangement direction;

[0026] G2 represents the support force exerted on the supporting equipment;

[0027] G3 represents the component force of the support equipment along the working face.

[0028] Furthermore, the support equipment includes a working surface bottom plate abutting against the working surface bottom plate, and a support equipment shielding beam, and a first instability mechanical model is constructed, including:

[0029] Obtaining second parameters, the second parameters include a maximum coal seam height h at which the coal mining machine can effectively operate, and a length S of a support equipment shielding beam of the support equipment in the direction of the working face;

[0030] The first instability mechanical model is constructed according to the second parameter, G1, G2, and G3. The first instability mechanical model is as follows:

[0031]

[0032] Where: μ1 represents the friction coefficient between the bottom plate of the working surface and the base of the support equipment in the direction of the support equipment;

[0033] L represents the length of the support equipment base.

[0034] Furthermore, the second parameter also includes the support force T1 of the working surface bottom plate on the support equipment when the support equipment is in the moving state, the friction force f1 between the working surface bottom plate and the support equipment base when the support equipment is in the moving state, and the first instability mechanical model is constructed according to the second parameter, G1, G2, and G3, including:

[0035] The first model is constructed according to the second parameters, G1, G2, and G3, as follows:

[0036]

[0037] The first formula is obtained by combining the formula of the first model with the formula of the mechanical analysis model as follows:

[0038]

[0039] The formula of the second model is constructed. The formula of the second model includes the model formula when the support equipment is in the downward mining state and the model formula when the support equipment is in the upward mining state. The model formula in the downward mining state is shown as follows:

[0041] G2S=G3h / 2;

[0042] The model formula in the upward mining state is as follows:

[0043] G2(LS)=G3h / 2;

[0044] The formula of the second model is combined with the formula of the mechanical analysis model to obtain the second formula, which includes the A model formula when the support equipment is in the downward mining state and the B model formula when the support equipment is in the upward mining state, wherein the A model formula is as follows:

[0045]

[0046] The B model formula is as follows:

[0047]

[0048] The first instability mechanical model is obtained according to the first formula and the first model and according to the second formula and the second model.

[0049] Furthermore, a second instability mechanical model is constructed, including:

[0050] Obtain the third parameter, the width b of the support equipment, and the friction coefficient μ2 between the bottom plate of the working surface of the support equipment and the base of the support equipment in the inclination direction;

[0051] The second instability mechanical model is constructed according to the third parameter, G1, G2, and G3. The second instability mechanical model is as follows:

[0052]

[0053] Furthermore, the third parameter also includes a support force T2 of the bottom plate of the working surface of the protective device on the protective device in the inclination direction. The second instability mechanical model constructed according to the third parameter, G1, G2, and G3 includes:

[0054] According to the third parameter, G1, G2, and G3 construct the third model as follows:

[0055]

[0056] The third formula is obtained by combining the second model with the formula of the mechanical analysis model as follows:

[0057]

[0058] The formula for constructing the fourth model is shown below:

[0059] G1h / 2=G2b / 2;

[0060] The fourth formula is obtained by combining the formula of the fourth model with the formula of the mechanical analysis model, as follows:

[0061]

[0062] The second instability mechanical model is obtained according to the third formula and the third model, and the fourth formula and the fourth model.

[0063] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium includes a stored program, wherein the program executes the above method when it is run.

[0064] According to another aspect of the present invention, an electronic device is provided, comprising a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to execute the above method through the computer program.

[0065] According to another aspect of the present invention, a computer program product is provided, comprising a computer program, and when the computer program is executed by a processor, the method as described above is implemented.

[0066] Applying the technical solution of the present invention, based on the mechanical model of the support equipment and the geological conditions of the working face, the application calculates the maximum allowable angle (first inclination angle and first strike angle) of the support equipment in the inclination and strike directions without losing stability through theoretical analysis, obtains the measured angle of the working face, including the second inclination angle and the second strike angle, and compares the measured second inclination angle and the second strike angle with the critical value of the support tipping in real time. If the second inclination angle is greater than the first inclination angle or the second strike angle is greater than the first strike angle, the system automatically marks the area as a dangerous area, and issues an early warning to the operators and managers at the mining site, prompting them to take necessary safety measures. According to the distribution of the dangerous area, the working face advancement speed, support equipment support parameters, coal mining methods, etc. are adjusted in real time to reduce the risk of slippage and tipping. Increase the density of support equipment in the dangerous area, use more efficient support equipment, such as anti-slip supports or reinforced supports, and strengthen geological monitoring and equipment maintenance in the area to ensure the stability of the support equipment and mining safety. After the early warning is issued, guide the on-site personnel to quickly evacuate the dangerous area, adjust the equipment position, avoid working in high-risk areas, and reduce the risk of loss of personnel and equipment.

[0067] By timely discovering and marking unstable danger zones according to the angle changes of the working face, it is possible to effectively prevent support equipment tipping accidents and reduce the risk of geological disasters in coal mining. Real-time division and early warning of danger zones enable mining strategies to be dynamically adjusted according to actual conditions, avoiding blind operations in high-risk areas and improving mining efficiency and resource utilization. Dynamic adjustment of mining parameters and timely evacuation of personnel can significantly reduce equipment damage and casualties caused by support tipping, and reduce operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0069] Figure 1 A diagram showing the sliding instability of the support equipment in the embodiment of the present application is shown;

[0070] Figure 2 A diagram showing the instability of the support equipment in the embodiment of the present application tending to slide;

[0071] Figure 3 A diagram showing the instability of the support equipment in the embodiment of the present application tilting forward is shown;

[0072] Figure 4 A diagram showing the backward instability of the support equipment in an embodiment of the present application is shown;

[0073] Figure 5 A diagram showing the tendency of the support equipment of an embodiment of the present application to fall over and become unstable is shown;

[0074] Figure 6 A structural diagram of a support device according to an embodiment of the present application is shown;

[0075] Figure 7 A mechanical analysis diagram of the support equipment of the embodiment of the present application in the strike-down mining state is shown;

[0076] Figure 8 A mechanical analysis diagram of the Zhihu device of an embodiment of the present application in a tilted downward mining state is shown;

[0077] Fig. 9 A stereoscopic view of the C double-angle working surface is shown;

[0078] Fig.10 The strike and dip contour map of the C double-dip working face is shown;

[0079] Fig.11 The dip angle contour map of the C double dip working face is shown;

[0080] Fig.12The result diagram of the division of the instability danger zone of the C double-inclination working face support equipment is shown;

[0081] Fig.13 The result diagram of the division of the instability danger zone of the inclined support equipment of the C double-inclination working face is shown;

[0082] Fig.14 This is a hardware structure block diagram of a computer terminal for the method for dividing the instability danger zone of a dual-inclination working face according to an embodiment of the present application.

[0083] The above drawings include the following reference numerals:

[0084] 1. Tail beam; 2. Cover beam; 3. Top beam; 4. Guard plate; X, direction; Y, inclination. DETAILED DESCRIPTION

[0085] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0086] As an important part of the energy industry, the safety and efficiency of coal mining directly affect the country's energy supply and economic development. In the process of coal mining, the design and layout of the working face are key links to ensure mining safety and improve mining efficiency. Traditional coal working face mining usually assumes that the direction of the coal seam strike and dip is relatively stable, that is, the working face is arranged roughly along the coal seam strike, and the mining direction is perpendicular to the strike, that is, it advances along the dip of the coal seam.

[0087] However, under complex geological conditions, such as stratum folds and syncline structures, coal working faces often face a "double dip" situation where both the strike and dip directions are significantly tilted. In this case, both the strike and dip directions of the coal seam may form large dips, causing the working face to adapt to both the circumferential pitch (changes in the dip angle in the strike direction) and the large dip angle changes during the mining process, bringing unprecedented challenges to mining operations.

[0088] Existing face mining technologies, such as traditional longwall mining, are mainly designed for single-direction inclined coal seams and are difficult to effectively meet the mining needs of "double-angle" face mining. Under "double-angle" conditions, the existing support systems, coal mining equipment and mining strategies may not ensure the stability of the face and the safety of personnel, and the mining efficiency and resource recovery rate will also be affected.

[0089] Specifically, the problems faced by existing technologies in "double-angle" working face mining include:

[0090] Increased support difficulty: The significant inclination of the coal seam in the strike and dip directions increases the complexity of the support system design for the working face. Traditional support methods may not be able to effectively support the working face, resulting in the risk of support instability.

[0091] Poor equipment adaptability: Existing coal mining equipment and transportation systems are mainly designed to adapt to coal seams inclined in a single direction. It is difficult to flexibly adjust to meet the mining needs of "double-angle" working faces, resulting in low equipment utilization efficiency.

[0092] Reduced mining efficiency: During the mining process of the "double-angle" working face under complex geological conditions, it may be necessary to frequently adjust the mining plan and equipment layout, which increases the uncertainty and cost of the mining operation and also reduces mining efficiency.

[0093] Safety hazards: The dual-inclination characteristics of coal seams increase the instability of the working face and the risks during mining, such as sudden collapse of coal walls and roofs, posing major challenges to mine safety.

[0094] First, this application analyzes the instability forms of the double-inclination working face support and the main factors causing them. Next, the terms that may be used in this application are introduced;

[0095] Instability: Instability refers to the loss of a structure or system's original stable or balanced state when subjected to external forces or changes in environmental conditions. The forms of instability include sliding instability and tipping instability.

[0096] Double dip: In the field of geological engineering, especially in coal mining, "double dip" refers to the characteristics of the working face or coal seam having both strike dip and dip dip. The double dip includes strike dip and dip dip. The specific explanations of these two angles are as follows:

[0097] 1. Strike dip: refers to the inclination angle of the coal seam or working face in the strike direction, that is, the angle between the coal seam surface and the horizontal plane perpendicular to the strike of the coal seam. The strike dip reflects the degree of inclination of the coal seam in the length direction and has an important impact on the mining layout, transportation system design and working face advancement direction.

[0098] 2. Dip Angle: refers to the inclination angle of the coal seam or working face in the inclination direction, that is, the angle between the coal seam surface and the horizontal plane perpendicular to the coal seam inclination. The dip angle reflects the degree of inclination of the coal seam in the depth direction and has a direct impact on the stability of the mining equipment and the safety of the mining operation.

[0099] When a coal seam or working face has significant inclination in both strike and dip, it is called a "double-dip" coal seam or working face.

[0100] Roof: The roof refers to the rock or soil layer above the working face. During the mining process, it blocks the pressure of the overlying rock strata and protects the mining space from collapse.

[0101] Floor: The floor refers to the rock or soil layer below the working face, which provides a support surface for the bracket and other mining equipment. The stability of the floor is crucial to prevent floor heave and keep the mining equipment stable.

[0102] Next, the main factors affecting the double tilt angle are analyzed:

[0103] Sliding instability: The sliding instability of the support equipment is mainly caused by the friction between the top plate of the working face and the bottom plate of the working face on the support equipment being less than the component force of the support equipment's own gravity (or overburden load) along the sliding direction. It mostly occurs on the working face with a large inclination angle or the working face with a smooth top and bottom plate of the support equipment (there is water gushing or water accumulation on the working face, etc.). The sliding instability of the support equipment is as follows: Figure 1 As shown, the support equipment tends to slide and fail in the following ways: Figure 2 shown.

[0104] The main reason for the tilting instability of the support equipment is that the combined force point of the support equipment's own gravity and the overburden load it receives deviates from the center of the support equipment, resulting in the risk of the support equipment toppling along the direction or inclination. Figure 3 As shown, the support equipment moves backward and loses stability. Figure 4 As shown in the figure, the support equipment tends to collapse and become unstable. Figure 5 shown.

[0105] The main factors affecting the stability of support equipment include:

[0106] (1) Geological conditions

[0107] (1.1) Coal seam inclination: the critical inclination that affects the hydraulic support of the working face;

[0108] (1.2) Mining height: As the mining height increases, the support height of the support equipment increases, and the center of gravity of the support equipment increases, which increases the tipping moment of the support equipment and makes its self-stability worse. Actual production shows that as the mining height increases, the possibility of the support equipment tipping increases exponentially, and the stability decreases significantly;

[0109] (1.3) Working surface top plate and working surface bottom plate (referred to as top and bottom plates): When the working surface top plate is unstable and leaks, once the working surface top plate leaks, an empty top will be formed above the support equipment, and the support equipment will lose the anti-tilting torque provided by the working surface top plate, making the support equipment in a free sliding state. At the same time, the tilting and sliding of the support equipment is closely related to the friction coefficient between the support equipment and the working surface top plate. The larger the friction coefficient, the more beneficial it is to the anti-tilting and anti-slipping of the support equipment. When the top and bottom plates are smooth or the top and bottom plates are sprayed with water, the friction coefficient will be greatly reduced, which is not conducive to the anti-tilting and anti-slipping of the support equipment.

[0110] (2) Structural characteristics of support equipment

[0111] (2.1) Initial support force: When the hydraulic support equipment is in normal working condition, the existence of the initial support force makes the top beam 3 and the base of the support equipment evenly contact with the top plate and the bottom plate respectively. The friction force generated thereby plays an important role in controlling the stability of the support equipment. If the initial support force of the support equipment is too low, it will inevitably affect the magnitude of the friction force acting to stabilize the support equipment, and thus will also affect the stability of the top plate of the working face. In severe cases, it may cause the top plate of the working face to break and leak, thereby affecting the stability of the support equipment;

[0112] (2.2) Side protection device for supporting equipment: The side protection plate of the supporting equipment not only ensures good anti-gangue and sealing performance of the supporting equipment, but also increases the lateral constraints between the supporting equipment. Especially when the top plate of the working surface above the supporting equipment is hollow, the side protection capacity of the adjacent supporting equipment plays an important role in preventing the supporting equipment from tipping over;

[0113] (2.3) Strength of support equipment structure: The structure of the support equipment is as follows: Figure 6 The supporting equipment comprises a tail beam 1, a shield beam 2, a top beam 3 and a guard plate 4. When the supporting equipment topples and slides down to a certain extent, the columns, four-linkages and shield beam structures are often twisted and deformed due to the eccentric load. If the structural components of the supporting equipment are not strong enough, it may cause torsion damage to the structural components, aggravating the toppling and sliding of the supporting equipment. It should be noted that the supporting equipment belongs to the prior art, and the technical solution of the present application only uses one or several components of the supporting equipment.

[0114] The shape of the support equipment in this application is as follows Figure 6 shown.

[0115] Therefore, in order to solve the above technical problems, the present application provides a method for dividing the instability danger zone of a dual-inclination working surface, a storage medium and an electronic device.

[0116] First of all, the present application provides a method for dividing the instability danger zone of a double-inclination working face. The division method of the present application mainly includes the following four possible situations, namely: 1. strike slip; 2. strike tipping; 3. inclination slip; 4. inclination tipping; among them, strike tipping is divided into strike downward mining tipping and strike upward mining tipping.

[0117] Because the critical angles in this application include the above five situations, when obtaining the measured angles of the working face, it is also necessary to obtain the measured angles corresponding to the above five situations, and then compare them one by one. As long as one of the measured angles is greater than one of the above five situations, it proves that the support equipment will be unstable under the current working face conditions, and corresponding measures need to be taken.

[0118] The method for dividing the instability danger zone of the double-inclination working face provided in this application is based on the support equipment. During the mining process of the working face, the support equipment is used to support the roof to prevent the roof of the tunnel or goaf from collapsing, so as to ensure the safety and stability of the working face. The roof is the coal seam or rock part above the working face. The division method includes:

[0119] Obtaining a critical value of the collapse of the supporting equipment, the critical value including a first inclination angle and a first strike angle;

[0120] Obtaining the measured angle of the working face, the measured angle including the second inclination angle and the second strike angle;

[0121] When it is determined that the second inclination angle is greater than the first inclination angle, the area is marked as a dangerous area; or,

[0122] When it is determined that the second strike angle is greater than the first strike angle, the area is marked as a danger zone.

[0123] Specifically, based on the mechanical model of the support equipment and the geological conditions of the working face, the application calculates the maximum allowable angle (first inclination angle and first strike angle) of the support equipment in the inclination and strike directions without losing stability through theoretical analysis, obtains the measured angle of the working face, including the second inclination angle and the second strike angle, and compares the measured second inclination angle and the second strike angle with the critical value of the support tipping in real time. If the second inclination angle is greater than the first inclination angle or the second strike angle is greater than the first strike angle, the system automatically marks the area as a dangerous area, and issues an early warning to the operators and managers at the mining site, prompting them to take necessary safety measures. According to the distribution of the dangerous area, the working face advancement speed, support equipment support parameters, coal mining methods, etc. are adjusted in real time to reduce the risk of slippage and tipping. Increase the density of support equipment in the dangerous area, use more efficient support equipment, such as anti-slip supports or reinforced supports, and strengthen geological monitoring and equipment maintenance in the area to ensure the stability of the support equipment and mining safety. After the early warning is issued, guide the on-site personnel to quickly evacuate the dangerous area, adjust the equipment position, avoid working in high-risk areas, and reduce the risk of loss of personnel and equipment.

[0124] By timely discovering and marking unstable danger zones according to the angle changes of the working face, it is possible to effectively prevent support equipment tipping accidents and reduce the risk of geological disasters in coal mining. Real-time division and early warning of danger zones enable mining strategies to be dynamically adjusted according to actual conditions, avoiding blind operations in high-risk areas and improving mining efficiency and resource utilization. Dynamic adjustment of mining parameters and timely evacuation of personnel can significantly reduce equipment damage and casualties caused by support tipping, and reduce operating costs.

[0125] The technical solution of the present invention can accurately divide the instability risk zone by measuring the actual inclination angle of the working face and combining it with the mechanical characteristics of the support equipment, providing a scientific basis for the safety management and real-time adjustment of coal mining. Compared with the existing technology, the present invention can warn of instability risks earlier and control the mining process more accurately, thereby significantly improving the safety and efficiency of mining operations and reducing operating costs and the risk of personnel and equipment losses.

[0126] Furthermore, the critical value of the collapse of the supporting equipment is obtained, including:

[0127] Construct mechanical analysis models;

[0128] Specifically, the specific steps of obtaining the critical value of the collapse of the support equipment include: constructing a mechanical analysis model, and the specific steps of constructing the mechanical analysis model are as follows:

[0129] Obtain the first parameter, which includes obtaining the elevation angle or depression angle α of the working face, obtaining the inclination angle β of the working face, obtaining the angle between the component force direction of the support equipment gravity G along the working face direction and the inclination component force direction of the working face And obtain the angle θ between the plane where the working surface is located and the horizontal plane;

[0130] According to the first parameter, a mechanical analysis model is constructed, and the formula of the mechanical analysis model is:

[0131]

[0132] Where: G1 represents the component force of the support equipment along the working face arrangement direction;

[0133] G2 represents the support force exerted on the supporting equipment;

[0134] G3 represents the component force of the support equipment along the working face.

[0135] Specifically, by obtaining the elevation or depression angle α of the working face, the inclination angle β of the working face, the component forces of the support equipment gravity G in different directions, and the angle between the working face and the horizontal plane The constructed mechanical analysis model can accurately calculate the stability parameters of the support equipment under the double-angle working surface. The constructed mechanical analysis model is as follows:

[0136]

[0137] Using the model formula G1 represents the component force of the support equipment along the working face arrangement direction; G2 represents the supporting force of the support equipment; G3 represents the component force of the support equipment along the working face direction, the stability of the support equipment can be scientifically evaluated, and the potential risk of instability can be predicted, so as to take preventive measures to avoid accidents.

[0138] The mechanical analysis model can help engineers understand the force distribution of support equipment under complex tilt conditions and provide a theoretical basis for the design and improvement of support equipment. The calculation of G1, G2 and G3 can guide the optimization of support equipment structural parameters, such as adjusting the tilt adaptability of support equipment, enhancing lateral and bottom support capabilities, and improving the base and top beam 3 design of support equipment to make it more suitable for mining conditions of double-tilt working faces.

[0139] The results of mechanical model analysis can provide an important reference for the adjustment of mining strategies. When it is predicted that the risk of instability in a specific area is high, the mining path can be optimized by adjusting the mining sequence, support equipment layout, support strength and other parameters to avoid intensive mining in high-risk areas, reduce the possibility of geological disasters, and improve mining efficiency and safety. By predicting and preventing the instability of support equipment in advance, the waste of resources and the increase in costs caused by equipment damage, accident handling and subsequent repair work can be reduced. In addition, the optimization of design and mining strategies can improve the recovery rate of coal resources, reduce energy and material consumption in the mining process, and achieve a dual improvement in economic and environmental benefits. The construction and application of mechanical analysis models can promote the advancement of data collection, processing and analysis technologies in mining engineering, and provide a technical basis for the development of intelligent mining systems. By real-time monitoring and analysis of working face parameters, intelligent monitoring and early warning of the mining process can be achieved, and the intelligence level of the entire mining operation can be improved.

[0140] In short, the mechanical analysis model constructed based on the first parameter can provide a scientific basis for the stability of support equipment and the optimization of mining strategies in double-angle working faces, effectively prevent geological disasters, reduce accident risks, improve the safety, efficiency and economic benefits of coal mining, and promote the development of mining technology towards intelligence.

[0141] Construct the first instability mechanical model, which is the instability mechanical model constructed when the support equipment is in the moving state, where: Figure 6 The X direction is the strike direction, and the Y direction is the inclination. The steps to construct the first instability mechanical model are as follows:

[0142] The mechanical analysis of the support equipment in the strike-down mining state is carried out, and the analysis results are as follows: Figure 7 As shown, the support equipment includes a working surface bottom plate abutting against the working surface bottom plate, and a support equipment shielding beam 2, and a first instability mechanical model is constructed, including:

[0143] Obtaining second parameters, the second parameters include the maximum coal seam height h at which the coal mining machine can effectively operate, and the length S of the support equipment shielding beam 2 of the support equipment in the direction of the working face;

[0144] The first instability mechanical model is constructed according to the second parameter, G1, G2, and G3. The first instability mechanical model is as follows:

[0145]

[0146] Where: μ1 represents the friction coefficient between the bottom plate of the working surface and the base of the support equipment in the direction of the support equipment;

[0147] L represents the length of the support equipment base.

[0148] Specifically, the first instability mechanical model is constructed, taking into account the specific structure and working characteristics of the support equipment, which can more comprehensively evaluate its stability under the double-angle working surface, as shown below:

[0149] Use high-precision measuring equipment to determine the maximum coal seam height h at which the shearer can effectively operate, and measure the actual length S of the support equipment shield beam 2 in the direction of the working face, which directly affects the stability of the support equipment and its coordinated operation with the shearer. According to G1 (the component of the support equipment along the working face layout direction), G2 (the support force received by the support equipment), G3 (the component of the support equipment along the working face direction), the maximum coal seam height h and the length S of the support equipment shield beam 2, a complete first instability mechanical model is established, taking into account the double inclination of the working face, the deadweight of the equipment, the coal seam characteristics and the structural dimensions of the equipment.

[0150] Key data such as working face angle, support equipment stress, coal seam height, etc. are collected in real time and input into the first instability mechanical model for dynamic analysis. According to the output results of the model, the length S of the support equipment shield beam 2 is adjusted to adapt to different working face inclinations to ensure that the support can still provide sufficient support force under double inclination conditions. The support parameters of the support equipment, such as the size and direction of the support force, are adjusted to ensure that G2 can effectively resist G1 and G3 to prevent the support equipment from slipping and tipping during coal seam mining. According to the maximum coal seam height h, the collaborative operation mode of the coal mining machine and the support equipment is optimized to ensure that the coal mining machine is within the effective operating height to avoid the risk of increased support instability due to improper height. When the model predicts that the support may be unstable, an early warning is immediately issued to guide on-site personnel to take emergency risk avoidance measures, such as adjusting the working face advancement direction, increasing the support density, or suspending operations for inspection and reinforcement.

[0151] The first instability mechanical model can accurately predict the instability risk of the support under the double-angle working face, provide real-time warning for on-site operations, and significantly improve the safety of mining operations. By dynamically adjusting the length S of the support equipment shield beam 2 and accurately calculating G1, G2, and G3, the best match between the support equipment and the working face conditions can be achieved, and the working efficiency and reliability of the equipment can be improved. By preventing and reducing instability accidents of support equipment, the cost of accident handling and equipment maintenance can be reduced, while the amount and quality of coal mining can be increased, and economic benefits can be improved.

[0152] In summary, by constructing the first instability mechanical model and combining it with real-time monitoring and data analysis, it is possible to accurately assess and warn of the instability risk of support equipment during the double-angle working face mining process, thereby effectively improving the safety, efficiency and economic benefits of mining operations and promoting mining engineering to develop in a more scientific and intelligent direction.

[0153] Furthermore, the second parameter also includes the support force T1 of the working surface bottom plate on the support equipment when the support equipment is in the moving state, the friction force f1 between the working surface bottom plate and the support equipment base when the support equipment is in the moving state, and the first instability mechanical model is constructed according to the second parameter, G1, G2, and G3, including:

[0154] The first model is constructed according to the second parameters, G1, G2, and G3, as follows:

[0155]

[0156] The first formula is obtained by combining the formula of the first model with the formula of the mechanical analysis model as follows:

[0157]

[0158] The formula of the second model is constructed. The formula of the second model includes the model formula when the support equipment is in the downward mining state and the model formula when the support equipment is in the upward mining state. The model formula in the downward mining state is shown as follows:

[0159] G2S=G3h / 2;

[0160] The model formula in the upward mining state is as follows:

[0161] G2(LS)=G3h / 2;

[0162] The formula of the second model is combined with the formula of the mechanical analysis model to obtain the second formula, which includes the A model formula when the support equipment is in the downward mining state and the B model formula when the support equipment is in the upward mining state, wherein the A model formula is as follows:

[0163]

[0164] The B model formula is as follows:

[0165]

[0166] The first instability mechanical model is obtained according to the first formula and the first model and according to the second formula and the second model.

[0167] Constructing a second instability mechanical model, where the second instability mechanical model is an instability mechanical model constructed when the support equipment is in a tilted state;

[0168] The specific steps of constructing the second instability mechanical model include:

[0169] The force of the support equipment in the inclined mining state is analyzed, and the analysis results are as follows: Figure 8 As shown,

[0170] Obtain the third parameter, the width b of the support equipment, and the friction coefficient μ2 between the bottom plate of the working surface of the support equipment and the base of the support equipment in the inclination direction;

[0171] The second instability mechanical model is constructed according to the third parameter, G1, G2, and G3. The second instability mechanical model is as follows:

[0172]

[0173] Furthermore, the third parameter also includes the support force T2 of the bottom plate of the working surface of the protective device on the protective device in the inclination direction. The second instability mechanical model is constructed according to the third parameter, G1, G2, and G3, including:

[0174] According to the third parameter, G1, G2, and G3 construct the third model as follows:

[0175]

[0176] The third formula is obtained by combining the formula of the second model with the formula of the mechanical analysis model as follows:

[0177]

[0178] The formula for constructing the fourth model is shown below:

[0179] G1h / 2=G2b / 2;

[0180] The fourth formula is obtained by combining the formula of the fourth model with the formula of the mechanical analysis model, as follows:

[0181]

[0182] The second instability mechanical model is obtained according to the third formula and the third model, and the fourth formula and the fourth model.

[0183] Next, the above embodiment is described by example:

[0184] Applying the above division method, the instability danger zone of the support equipment of the C double-angle working face of a coal mine is divided, and the machine mining height h is set to 4.0 meters. The friction coefficients μ1 and μ2 between the bottom plate of the working face and the base of the support equipment are both 0.2. The model of the selected support equipment is ZFA15000 / 25 / 43D, the width b of the support equipment is 1.75 meters, the length L of the base of the support equipment is 3.2 meters, the length S of the support equipment shield beam 2 in the working face is 2.4 meters, the working face strike inclination angle range is 0-16°, and the dip inclination angle range is 16-35°. Substituted into the above model calculation formula, the critical angle of strike slip of the C face of the coal mine is 9.2-10.9°, the critical angle of strike tipping is 22.4°-44.1° (including 22.4-26.5° in the downward mining stage and 36.3°-44.1° in the upward mining stage), the critical angle of dip slip of the C face is 10.9°-11.3°, and the critical angle of dip tipping is 22.8°-22.6°;

[0185] Based on the elevation data of multiple feature points on the working face, the gridded quantitative data processing combined with the Kelijin interpolation method is used to obtain the three-dimensional image of the C-face double-angle working face. Fig. 9 As shown, the C double-angle working face strike / dip angle contour map is as follows Fig.10 and Fig.11 As shown in the figure, the calculation results of the critical angle of instability of the support equipment of the C double-angle working face are used as the criterion to divide and delineate the instability danger zone of the support equipment of the double-angle working face, and the following results are obtained: the C double-angle working face has no support equipment dumping area in the direction and part of it is a sliding area; the inclination is the authoritative support equipment sliding area and part of it is a dumping area. The division results of the instability danger zone of the C double-angle working face are shown in the figure. Fig.12 and Fig.13 As shown, Fig.12 The diagram represents the result of the division of the instability danger zone of the support equipment in the C double-angle working face. Fig.13 The figure represents the result of demarcation of the instability danger zone of the inclined support equipment of the C double-inclination working face.

[0186] The method embodiments provided in the embodiments of the present application can be executed in a computer terminal, a mobile terminal or a similar computing device. Taking running on a computer terminal as an example, Fig.14 1 is a hardware structure block diagram of a computer terminal of a method for managing regenerative energy consumption according to an embodiment of the present application. Fig.14 As shown, the computer terminal may include one or N ( Fig.14Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor (Central Processing Unit, CPU) or a programmable logic device (Field Programmable Gate Array, FPGA)) and a memory 104 for storing data, wherein the above-mentioned computer terminal may also include a transmission device 106 and an input and output device 108 for communication functions. It can be understood by those skilled in the art that Fig.14 The structure shown is only for illustration and does not limit the structure of the above-mentioned computer terminal. Fig.14 More or fewer components as shown, or with Fig.14 Different configurations are shown.

[0187] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the adjustment method of the monitoring network point in the embodiment of the present application. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, to implement the above method. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or N magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories may be connected to the computer terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0188] The transmission device 106 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of a computer terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0189] An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above method embodiments when run.

[0190] In an exemplary embodiment, the computer-readable storage medium may include, but is not limited to, various media that can store computer programs, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk.

[0191] For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary implementation modes, and this embodiment will not be described in detail herein.

[0192] An embodiment of the present application further provides a computer program product, including a computer program, and when the computer program is executed by a processor, the steps of any one of the above method embodiments are performed.

[0193] An embodiment of the present application further provides another computer program product, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in any of the above method embodiments are implemented.

[0194] An embodiment of the present application further provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0195] In an exemplary embodiment, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0196] For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary implementation modes, and this embodiment will not be described in detail herein.

[0197] Obviously, those skilled in the art should understand that the above modules or steps of the present application can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of N computing devices, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order from that here, or they can be made into individual integrated circuit modules, or N of the modules or steps can be made into a single integrated circuit module for implementation. In this way, the present application is not limited to any specific combination of hardware and software.

[0198] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0199] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0200] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0201] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0202] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0203] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for dividing the instability danger zone of a double-inclination working face, characterized in that: The division method is implemented based on the support equipment. During the mining process of the working face, the support equipment is used to support the roof to prevent the roof of the tunnel or goaf from collapsing, so as to ensure the safety and stability of the working face, wherein the roof is the coal seam or rock part above the working face, and the division method includes: Obtaining a critical value for the collapse of the supporting device, wherein the critical value includes a first inclination angle and a first strike angle; Acquire the measured angle of the working face, wherein the measured angle includes a second inclination angle and a second strike angle; When it is determined that the second inclination angle is greater than the first inclination angle, marking the area as a dangerous area; or, When it is determined that the second strike angle is greater than the first strike angle, the area is marked as a dangerous area.

2. The method for dividing the instability danger zone of a dual-inclination working face according to claim 1 is characterized in that: The step of obtaining the critical value of the collapse of the supporting device comprises: Construct mechanical analysis models; Constructing a first instability mechanical model, wherein the first instability mechanical model is an instability mechanical model constructed when the support device is in a moving state; constructing a second instability mechanical model, wherein the second instability mechanical model is an instability mechanical model constructed when the support device is in a tilted state; According to the mechanical analysis model, the first instability mechanical model and the second instability mechanical model calculate the critical value of the collapse of the supporting equipment.

3. The method for dividing the instability danger zone of a dual-inclination working face according to claim 2 is characterized in that: The construction of the mechanical analysis model comprises: Obtain the first parameter, which includes obtaining the elevation angle or depression angle α of the working face, obtaining the inclination angle β of the working face, and obtaining the angle between the gravity G of the support equipment along the direction of the component force of the working face and the direction of the inclination component force of the working face. and obtaining an angle θ between the plane where the working surface is located and the horizontal plane; The mechanical analysis model is constructed according to the first parameter. The formula of the mechanical analysis model is: Where: G1 represents the component force of the support equipment along the direction of the working surface arrangement; G2 represents the supporting force exerted on the supporting equipment; G3 represents the component force of the supporting equipment along the working face.

4. The method for dividing the instability danger zone of a dual-inclination working face according to claim 3 is characterized in that: The support equipment includes a working surface bottom plate abutting against the working surface bottom plate, and a support equipment shielding beam, and the first instability mechanical model is constructed, including: Obtaining second parameters, the second parameters including a maximum coal seam height h at which the coal mining machine can effectively operate, and a length S of a support equipment shielding beam of the support equipment in the direction of the working face; The first instability mechanical model is constructed according to the second parameter, G1, G2, and G3. The first instability mechanical model is as follows: Where: μ1 represents the friction coefficient between the bottom plate of the working surface on the support equipment and the base of the support equipment; L represents the length of the base of the support device.

5. The method for dividing the instability danger zone of a dual-inclination working face according to claim 4 is characterized in that: The second parameter also includes the supporting force T1 of the working surface bottom plate on the supporting device when the supporting device is in the moving state, the friction force f1 between the working surface bottom plate and the base of the supporting device when the supporting device is in the moving state, and the first instability mechanical model is constructed according to the second parameter, G1, G2, and G3, including: The first model is constructed according to the second parameter, G1, G2, and G3 as follows: The first model is combined with the formula of the mechanical analysis model to obtain the first formula as follows: Construct a formula for the second model, wherein the formula for the second model includes a model formula when the support device is in a prone mining state and a model formula when the support device is in an overhead mining state, wherein the model formula in the prone mining state is as follows: G2S=G3h / 2; The model formula in the upward mining state is as follows: G2(LS)=G3h / 2; The formula of the second model is combined with the formula of the mechanical analysis model to obtain the second formula, wherein the second formula includes the A model formula when the support equipment is in the prone mining state and the B model formula when the support equipment is in the prone mining state, wherein the A model formula is as follows: The B model formula is as follows: The first instability mechanical model is obtained according to the first formula and the first model, and according to the second formula and the second model.

6. The method for dividing the instability danger zone of a dual-inclination working face according to claim 5 is characterized in that: The constructing of the second instability mechanical model comprises: Obtain the third parameter, the width b of the support device, and the friction coefficient μ2 between the bottom plate of the working surface of the support device and the base of the support device in the inclination direction; The second instability mechanical model is constructed according to the third parameter, G1, G2, and G3. The second instability mechanical model is as follows:

7. The method for dividing the instability danger zone of a dual-inclination working face according to claim 6 is characterized in that: The third parameter also includes the support force T2 of the bottom plate of the working surface of the protective device on the protective device in the inclination direction. The second instability mechanical model constructed according to the third parameter, G1, G2, and G3 includes: According to the third parameter, G1, G2, and G3 construct a third model as follows: The third formula obtained by combining the formula of the second model with the formula of the mechanical analysis model is as follows: The formula for constructing the fourth model is shown below: G1h / 2=G2b / 2; The fourth formula is obtained by combining the formula of the fourth model with the formula of the mechanical analysis model, as follows: The second instability mechanical model is obtained according to the third formula and the third model, and the fourth formula and the fourth model.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein the program executes the method according to any one of claims 1 to 7 when executed.

9. An electronic device comprising a memory and a processor, characterized in that: A computer program is stored in the memory, and the processor is configured to execute the method according to any one of claims 1 to 7 through the computer program.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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