A method, device and equipment for determining the stability of a transmission line

Abstract

The present invention provides a method, device and equipment for determining the stability of a transmission line, and relates to the technical field of transmission line stability evaluation. The present invention solves the problem of poor accuracy in evaluating the stability of a goaf site of a transmission line using the existing method for determining the stability of a transmission line. The method for determining the stability of a transmission line comprises: obtaining basic geographic information of the goaf site where the transmission line is located; determining, based on the basic geographic information, that the bedrock layer of the curved moving zone of the goaf site is subjected to a maximum tensile stress; determining, based on the maximum tensile stress, a stability evaluation index of the goaf site of the transmission line; and determining, based on the stability evaluation index and a preset evaluation standard, the stability of the transmission line in the current goaf site. The scheme of the present invention realizes a precise evaluation of the stability of the transmission line in the goaf site, and improves the accuracy of the evaluation index.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission line stability evaluation, and in particular to a method, device and equipment for determining the stability of a transmission line. Background Art

[0002] Goaf sites refer specifically to coal mine goafs, which are the cavities or hollow spaces left after underground coal or gangue is mined during coal mining operations. Goafs can cause ground subsidence and collapse, and the resulting surface movement and deformation include surface movement basins, up and down displacement of the surface, surface cracks, surface inclination, collapse pits, surface undulations, and surface translation. For transmission line design, it is necessary to analyze the impact of surface movement and deformation characteristics caused by goaf site subsidence on transmission line towers, and evaluate the stability of the goaf site. The existing commonly used mining depth The quantitative indicator of mining thickness ratio is usually based on the internal mechanism of rock movement characteristics caused by coal mining. It is a comparison of the height and burial depth of the overburden movement, deformation, collapse and fracture zone. The factors affecting the stability of the goaf include coal seam mining depth and coal seam mining thickness, but the factors considered are single, only considering mining depth and mining thickness. In addition, the stability of the goaf is also related to the tensile properties of the rock strata, the span of the goaf, the thickness of the covering soil layer, the collapse and fracture height, and the thickness of the bedrock layer in the curved movement zone. Therefore, the mining depth and mining thickness ratio indicator alone cannot accurately reflect the stability of the goaf site of the transmission line. Summary of the invention

[0003] The present invention provides a method, device and equipment for determining the stability of a power transmission line, which solves the problem that the existing method for determining the stability of a power transmission line has poor accuracy when evaluating the stability of a goaf area of ​​a power transmission line.

[0004] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0005] An embodiment of the present invention provides a method for determining the stability of a power transmission line, which is applied to a goaf site. The method includes:

[0006] Obtain basic geographic information of the goaf site where the transmission line is located;

[0007] According to the basic geographic information, determining that the bedrock layer of the curved moving zone of the goaf site is subjected to the maximum tensile stress;

[0008] Determining the stability evaluation index of the transmission line goaf area site according to the maximum tensile stress;

[0009] The stability of the transmission line in the current goaf site is determined based on the stability evaluation index and preset evaluation criteria.

[0010] Optionally, the basic geographic information of the goaf site where the transmission line is located includes:

[0011] Goaf mining width of goaf site , the thickness of the coal seam overburden , the thickness of the fracture zone in the collapse zone , Mobile influence angle , the bedrock weight of the curved moving zone , the weight of loose soil layer in the bending moving zone , the ultimate tensile strength of the bedrock layer in the curved moving zone of the goaf site And the thickness D of the loose soil layer in the curved moving zone.

[0012] Optionally, determining, based on the basic geographic information, that the bedrock layer of the curved moving zone of the goaf site is subjected to the maximum tensile stress comprises:

[0013] According to the basic geographical information, it is determined that the bedrock layer of the curved moving zone is subjected to the ultimate bending moment and the bending section coefficient of the bedrock layer ;

[0014] By formula , determine the maximum tensile stress on the bedrock layer of the curved moving zone of the goaf site .

[0015] Optionally, based on the basic geographic information, determine the bedrock layer of the curved moving zone is subject to an ultimate bending moment ,include:

[0016] According to the basic geographic information, determining the equivalent uniformly distributed load q on the bedrock layer of the curved moving zone and the fracture span L of the bedrock layer;

[0017] By formula , determine the ultimate bending moment of the bedrock layer in the bending movement zone .

[0018] Optionally, based on the basic geographic information, determine that the bedrock layer of the curved moving zone is subjected to an equivalent uniformly distributed load ,include:

[0019] According to the basic geographical information, the formula , determine the bedrock layer of the bending movement zone is subjected to an equivalent uniformly distributed load ;

[0020] in, is the thickness of the bedrock layer in the flexural movement zone, , is the thickness of the coal seam overburden, is the thickness of the fracture zone in the collapse zone, and D is the thickness of the loose soil layer in the bending movement zone; The bedrock weight of the flexural mobile zone; It is the weight of loose soil layer in the bending moving zone.

[0021] Optionally, determining the stability evaluation index of the transmission line goaf site according to the maximum tensile stress includes:

[0022] By formula , determine the stability evaluation index of the transmission line goaf area site ;in, It is the ultimate tensile strength of the bedrock layer in the curved moving zone of the goaf site.

[0023] Optionally, determining the stability of the transmission line in the current goaf site according to the stability evaluation index and the preset evaluation standard includes:

[0024] When the stability evaluation index is greater than 0 and less than 0.75, the stability of the transmission line in the current goaf site is determined to be unstable;

[0025] When the stability evaluation index is greater than or equal to 0.75 and less than 1, the stability of the transmission line in the current goaf site is determined to be basically stable;

[0026] When the stability evaluation index is greater than or equal to 1, the stability of the transmission line in the current goaf site is determined to be stable.

[0027] An embodiment of the present invention further provides a device for determining the stability of a power transmission line, comprising:

[0028] An acquisition module is used to acquire basic geographic information of the goaf site where the transmission line is located;

[0029] A processing module is used to determine, based on the basic geographic information, that the bedrock layer of the curved moving zone of the goaf site is subjected to the maximum tensile stress; determine, based on the maximum tensile stress, a stability evaluation index of the goaf site of the transmission line; and determine, based on the stability evaluation index and a preset evaluation standard, the stability of the transmission line in the current goaf site.

[0030] An embodiment of the present invention further provides a computing device, comprising: a processor and a memory storing a computer program, wherein the computer program executes the above method when executed by the processor.

[0031] An embodiment of the present invention further provides a computer-readable storage medium, comprising: storing instructions, and when the instructions are executed on a computer, the computer executes the above method.

[0032] The above solution of the present invention includes at least the following beneficial effects:

[0033] The method for determining the stability of a power transmission line of the present invention obtains the basic geographic information of the goaf site where the power transmission line is located; determines the maximum tensile stress on the bedrock layer of the curved moving zone of the goaf site according to the basic geographic information; determines the stability evaluation index of the goaf site of the power transmission line according to the maximum tensile stress; determines the stability of the power transmission line in the current goaf site according to the stability evaluation index and the preset evaluation standard. The accurate evaluation of the stability of the power transmission line in the goaf site is achieved, and the accuracy of the evaluation index is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a flow chart of a method for determining the stability of a power transmission line according to the present invention;

[0035] Figure 2 It is a schematic diagram of the structure of the coal seam overburden in the goaf area in the method for determining the stability of the power transmission line of the present invention;

[0036] Figure 3 is a schematic structural diagram of a device for determining the stability of a power transmission line according to the present invention;

[0037] Description of reference numerals:

[0038] H, thickness of coal seam overburden; l, mining width of goaf; Hr, thickness of fracture zone of collapse zone; θ, movement influence angle; γ M , bedrock layer density; γ D Loose soil layer density; σ t , ultimate tensile strength of bedrock layer; D, thickness of loose soil layer; A, coal seam; e, goaf; a, thickness of fracture zone; b, thickness of collapse zone; Ht, thickness of bending movement zone; B, ground; L, fracture span of bedrock layer; M, thickness of bedrock layer. DETAILED DESCRIPTION

[0039] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0040] like Figure 1 to Figure 2 As shown, an embodiment of the present invention provides a method for determining the stability of a power transmission line, which is applied to a goaf site, and the method includes:

[0041] Step 11, obtaining basic geographic information of the goaf area where the transmission line is located;

[0042] Step 12, determining, based on the basic geographic information, that the bedrock layer of the curved moving zone of the goaf site is subjected to the maximum tensile stress;

[0043] Step 13, determining a stability evaluation index of the transmission line goaf area site according to the maximum tensile stress;

[0044] Step 14: Determine the stability of the transmission line in the current goaf site according to the stability evaluation index and the preset evaluation standard.

[0045] The basic geographic information of the goaf area where the transmission line is located includes:

[0046] Goaf mining width of goaf site , the thickness of the coal seam overburden , the thickness of the fracture zone in the collapse zone , Mobile influence angle , the bedrock weight of the curved moving zone , the weight of loose soil layer in the bending moving zone , the ultimate tensile strength of the bedrock layer in the curved moving zone of the goaf site And the thickness D of the loose soil layer in the curved moving zone.

[0047] In this embodiment, the basic geographical information of the goaf site where the transmission line is located can be obtained and determined through the geological model; wherein the goaf refers to the area where the coal seam is mined; the movement influence angle θ refers to the angle between the boundary of the influence range of the coal seam overburden and the horizontal plane in the horizontal direction where the coal seam A is located (that is, when the coal seam A is mined, the angle between the boundary of the influence range that causes the change of the coal seam overburden and the horizontal plane in the horizontal direction where the coal seam A is located); the thickness parameter H of the coal seam overburden refers to the thickness between the coal seam and the ground B where the transmission line is located; the curved moving zone includes loose soil layers and bedrock layers, which is the entire rock layer from the top boundary of the fracture zone to the surface. The movement of the rock layer in the curved moving zone is integral and the rock layer has good stability; the collapse zone and fracture zone include collapse zones and fracture zones, wherein the rock layer in the collapse zone is broken, and the size of the collapsed rock blocks is different and irregular; the rock layer in the fracture zone presents fractures, delamination and cracks, but still maintains a layered structure. Different from the damage condition of the collapse zone, the form and distribution of the cracks have certain regularities. The farther away from the goaf, the slighter the rock layer fracture; such as Figure 2 As shown, Figure 2 Where e is the goaf, a is the thickness of the rupture zone, b is the thickness of the collapse zone, and Ht is the thickness of the bending movement zone.

[0048] In this embodiment, the method for determining the stability of the transmission line is to determine the width of the goaf. , the thickness of the coal seam overburden , the thickness of the fracture zone in the collapse zone , Mobile influence angle , the bedrock weight of the curved moving zone , the weight of loose soil layer in the bending moving zone , the ultimate tensile strength of the bedrock layer in the curved moving zone of the goaf site The design of stability evaluation index is established by taking into account multiple factors such as the thickness D of the loose soil layer in the curved moving zone at the same time, which solves the problem of poor accuracy when the existing transmission line stability determination method directly evaluates the stability of the transmission line goaf area through a single influencing factor; it realizes the accurate evaluation of the stability of the transmission line in the goaf area and improves the accuracy of the evaluation index.

[0049] In an optional embodiment of the present invention, step 12 may include:

[0050] Step 121, based on the basic geographic information, determine the bedrock layer of the curved moving zone subjected to the ultimate bending moment and the bending section coefficient of the bedrock layer ;

[0051] Step 122, by formula , determine the maximum tensile stress on the bedrock layer of the curved moving zone of the goaf site .

[0052] In this embodiment, the calculation of the stability evaluation index is based on the tensile properties of the bedrock layer in the curved moving zone, which can make the evaluation result more reasonable;

[0053] In this embodiment, based on the basic geographic information, it is determined that the bedrock layer of the curved moving zone is subjected to the ultimate bending moment ,include:

[0054] According to the basic geographical information, it is determined that the bedrock layer of the curved moving zone is subjected to an equivalent uniformly distributed load. and the rupture span L of the bedrock layer;

[0055] By formula , determine the ultimate bending moment of the bedrock layer in the bending movement zone .

[0056] According to the basic geographic information, it is determined that the bedrock layer of the curved moving zone is subjected to an equivalent uniformly distributed load. ,include:

[0057] According to the basic geographical information, the formula , determine the bedrock layer of the bending movement zone is subjected to an equivalent uniformly distributed load ;

[0058] in, is the thickness of the bedrock layer in the flexural movement zone, , is the thickness of the coal seam overburden, is the thickness of the fracture zone in the collapse zone, and D is the thickness of the loose soil layer in the bending movement zone; The bedrock weight of the flexural mobile zone; It is the weight of loose soil layer in the bending moving zone.

[0059] According to the basic geographic information, the fracture span L of the bedrock layer of the curved movement zone is determined, including:

[0060] According to the basic geographical information, the formula , determine the rupture span L of the bedrock layer in the bending movement zone;

[0061] in, is the goaf mining width of the goaf site, is the thickness of the fracture zone in the collapse zone, is the movement influence angle.

[0062] In this embodiment, the design of the movement influence angle allows the evaluation index calculation to take into account the influence of the rock formation movement influence angle on the fracture span, thereby making the calculated evaluation index more accurate.

[0063] According to the basic geographical information, the bending section coefficient of the bedrock layer of the bending movement zone is determined. ,include:

[0064] According to the basic geographical information, the formula , determine the bending section coefficient of the bedrock layer in the bending movement zone ;

[0065] Among them, among them, is the thickness of the bedrock layer in the flexural movement zone, , is the thickness of the coal seam overburden, is the thickness of the fracture zone in the collapse zone, and D is the thickness of the loose soil layer in the bending movement zone.

[0066] In an optional embodiment of the present invention, step 13 may include:

[0067] By formula , determine the stability evaluation index of the transmission line goaf area site ;in, It is the ultimate tensile strength of the bedrock layer in the curved moving zone of the goaf site.

[0068] In an optional embodiment of the present invention, step 14 may include:

[0069] When the stability evaluation index is greater than 0 and less than 0.75, the stability of the transmission line in the current goaf site is determined to be unstable;

[0070] When the stability evaluation index is greater than or equal to 0.75 and less than 1, the stability of the transmission line in the current goaf site is determined to be basically stable;

[0071] When the stability evaluation index is greater than or equal to 1, the stability of the transmission line in the current goaf site is determined to be stable.

[0072] In this embodiment, when the stability evaluation index is evaluated as unstable, it means that the transmission line on the current goaf site will deviate and tilt, and the foundation needs to be replaced; when the stability evaluation index is evaluated as basically stable, it means that the transmission line on the current goaf site will not deviate and tilt, and can operate normally, but measurement and supervision are required at all times; when the stability evaluation index is evaluated as stable, it means that the transmission line on the current goaf site will not deviate and tilt, and is in a stable state, and the transmission line can operate safely.

[0073] The specific evaluation process of the method for determining the stability of a power transmission line according to the present invention will be described below by way of example using a specific embodiment:

[0074] Taking the data of a mining area in a certain region as the background, taking the 500kV line transmission towers in the working faces of the first and second coal mines in the mining area as an example, the parameters of the two coal mine working faces are shown in Table 1;

[0075] Table 1, working face parameters of the first coal mine and the second coal mine

[0076] Geological parameters unit First Coal Mine Second Coal Mine Thickness of overburden m 512 171 Thickness of fracture zone in collapse zone m 103 90 Thickness of loose soil layer m 10 8 Bedrock weight kN / m3 22 23 Loose soil weight kN / m3 15 16 Goaf mining width m 249 228 Moving influence angle ° 70 70 Ultimate tensile strength of bedrock kPa 5000 5000

[0077] Based on the parameters in Table 1, the stability evaluation index of the transmission line tower sites of the two coal mine working faces calculated by the method for determining the stability of the transmission line described in the present invention is 1.13 for the first coal mine and 0.23 for the second coal mine. According to the preset evaluation standard, the stability evaluation index of the first coal mine is greater than 1, which is in a stable state, and the stability evaluation index of the second coal mine is greater than 0 and less than 0.75, which is in an unstable state; then the tower operation result after coal seam mining is: the transmission line of the first coal mine is operating safely, and the transmission tower of the second coal mine is offset and tilted, and the foundation needs to be replaced. The method for determining the stability of the transmission line described in the present invention can truly reflect the difference in the stability of the transmission line in the goaf area by considering the quantitative indicators of multiple factors.

[0078] The method for determining the stability of the transmission line described in the present invention constructs a design of a stability evaluation index by combining the influence of multiple factors such as the tensile properties of the bedrock layer, the mining width of the goaf, the thickness of the loose soil layer, the thickness of the fracture zone in the collapse zone, and the thickness of the bedrock layer in the bending movement zone. A variety of influencing factors are taken into consideration, and the evaluation result can better reflect the actual geological stability situation and can be quantitatively calculated. The evaluation result is easier to apply to the design of transmission lines in goaf sites, and at the same time, the calculation accuracy is high and easy to implement; the calculation process can be easily obtained through conventional computer software.

[0079] like Figure 3 As shown, the embodiment of the present invention further provides a device 30 for determining the stability of a power transmission line, comprising:

[0080] An acquisition module 31 is used to acquire basic geographic information of the goaf area where the transmission line is located;

[0081] The processing module 32 is used to determine the maximum tensile stress on the bedrock layer of the curved moving zone of the goaf site based on the basic geographic information; determine the stability evaluation index of the goaf site of the transmission line based on the maximum tensile stress; and determine the stability of the transmission line in the current goaf site based on the stability evaluation index and preset evaluation standards.

[0082] Optionally, the basic geographic information of the goaf site where the transmission line is located includes:

[0083] Goaf mining width of goaf site , the thickness of the coal seam overburden , the thickness of the fracture zone in the collapse zone , Mobile influence angle , the bedrock weight of the curved moving zone , the weight of loose soil layer in the bending moving zone , the ultimate tensile strength of the bedrock layer in the curved moving zone of the goaf site And the thickness D of the loose soil layer in the curved moving zone.

[0084] Optionally, determining, based on the basic geographic information, that the bedrock layer of the curved moving zone of the goaf site is subjected to the maximum tensile stress comprises:

[0085] According to the basic geographical information, it is determined that the bedrock layer of the curved moving zone is subjected to the ultimate bending moment and the bending section coefficient of the bedrock layer ;

[0086] By formula , determine the maximum tensile stress on the bedrock layer of the curved moving zone of the goaf site .

[0087] Optionally, based on the basic geographic information, determine the bedrock layer of the curved moving zone is subject to an ultimate bending moment ,include:

[0088] According to the basic geographical information, it is determined that the bedrock layer of the curved moving zone is subjected to an equivalent uniformly distributed load. and the rupture span L of the bedrock layer;

[0089] By formula , determine the ultimate bending moment of the bedrock layer in the bending movement zone .

[0090] Optionally, based on the basic geographic information, determine that the bedrock layer of the curved moving zone is subjected to an equivalent uniformly distributed load ,include:

[0091] According to the basic geographical information, the formula , determine the bedrock layer of the bending movement zone is subjected to an equivalent uniformly distributed load ;

[0092] in, is the thickness of the bedrock layer in the flexural movement zone, , is the thickness of the coal seam overburden, is the thickness of the fracture zone in the collapse zone, and D is the thickness of the loose soil layer in the bending movement zone; The bedrock weight of the flexural mobile zone; It is the weight of loose soil layer in the bending moving zone.

[0093] Optionally, determining the stability evaluation index of the transmission line goaf site according to the maximum tensile stress includes:

[0094] By formula , determine the stability evaluation index of the transmission line goaf area site ;in, It is the ultimate tensile strength of the bedrock layer in the curved moving zone of the goaf site.

[0095] Optionally, determining the stability of the transmission line in the current goaf site according to the stability evaluation index and the preset evaluation standard includes:

[0096] When the stability evaluation index is greater than 0 and less than 0.75, the stability of the transmission line in the current goaf site is determined to be unstable;

[0097] When the stability evaluation index is greater than or equal to 0.75 and less than 1, the stability of the transmission line in the current goaf site is determined to be basically stable;

[0098] When the stability evaluation index is greater than or equal to 1, the stability of the transmission line in the current goaf site is determined to be stable.

[0099] It should be noted that the device is a device corresponding to the above method, and all implementation methods in the above method are applicable to the embodiments of the device and can achieve the same technical effects.

[0100] The embodiment of the present invention further provides a computing device, comprising: a processor and a memory storing a computer program, wherein when the computer program is executed by the processor, the above method is executed. All implementations in the above method embodiment are applicable to this embodiment and can achieve the same technical effect.

[0101] The embodiment of the present invention further provides a computer-readable storage medium storing instructions, which, when executed on a computer, enable the computer to execute the above method. All implementations in the above method embodiments are applicable to this embodiment and can achieve the same technical effect.

[0102] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0103] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0104] In the embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0105] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0106] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0107] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical disks.

[0108] In addition, it should be pointed out that in the apparatus and method of the present invention, it is obvious that each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present invention. Moreover, the steps of performing the above series of processing can naturally be performed in chronological order according to the order of description, but it is not necessary to perform them in chronological order, and some steps can be performed in parallel or independently of each other. For those of ordinary skill in the art, it is understandable that all or any steps or components of the method and apparatus of the present invention can be implemented in hardware, firmware, software or a combination thereof in any computing device (including processors, storage media, etc.) or a network of computing devices, which can be achieved by those of ordinary skill in the art using their basic programming skills after reading the description of the present invention.

[0109] Therefore, the purpose of the present invention can also be achieved by running a program or a group of programs on any computing device. The computing device can be a well-known general device. Therefore, the purpose of the present invention can also be achieved by simply providing a program product containing a program code that implements the method or device. That is to say, such a program product also constitutes the present invention, and the storage medium storing such a program product also constitutes the present invention. Obviously, the storage medium can be any well-known storage medium or any storage medium developed in the future. It should also be pointed out that in the device and method of the present invention, it is obvious that each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present invention. In addition, the steps of performing the above-mentioned series of processing can naturally be performed in chronological order according to the order of description, but it is not necessary to perform them in chronological order. Some steps can be performed in parallel or independently of each other.

[0110] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for determining the stability of a power transmission line, characterized in that: Applied to a goaf site, the method comprises: Obtain basic geographic information of the goaf site where the transmission line is located; Determine the maximum tensile stress on the bedrock layer of the curved moving zone of the goaf site based on the basic geographic information; Determining the stability evaluation index of the transmission line goaf area site according to the maximum tensile stress; Determining the stability of the transmission line at the current goaf site according to the stability evaluation index and the preset evaluation standard; The basic geographic information of the goaf where the transmission line is located includes: Goaf mining width of goaf site , the thickness of the coal seam overburden , the thickness of the fracture zone of the collapse zone , Mobile influence angle , the bedrock weight of the curved moving zone , the weight of loose soil layer in the bending moving zone , the ultimate tensile strength of the bedrock layer in the curved moving zone of the goaf site and the thickness D of the loose soil layer in the curved moving zone; According to the basic geographic information, the maximum tensile stress of the bedrock layer in the curved moving zone of the goaf site is determined, including: According to the basic geographical information, determine the ultimate bending moment of the bedrock layer of the bending movement zone and the bending section coefficient of the bedrock layer ; By formula , determine the maximum tensile stress on the bedrock layer of the curved moving zone of the goaf site ; According to the basic geographical information, determine the ultimate bending moment of the bedrock layer of the bending movement zone ,include: Based on the basic geographic information, determine the equivalent uniformly distributed load on the bedrock layer of the curved moving zone and the rupture span L of the bedrock layer; By formula , determine the ultimate bending moment of the bedrock layer in the bending movement zone ; Based on the basic geographic information, determine the equivalent uniformly distributed load on the bedrock layer of the curved moving zone ,include: According to the basic geographical information, the formula , determine the equivalent uniformly distributed load on the bedrock layer of the bending movement zone ; in, is the thickness of the bedrock layer in the flexural movement zone, , is the thickness of the coal seam overburden, is the thickness of the fracture zone in the collapse zone, and D is the thickness of the loose soil layer in the bending movement zone; The bedrock weight of the flexural mobile zone; It is the weight of loose soil layer in the bending moving zone; According to the maximum tensile stress, the stability evaluation index of the transmission line goaf area is determined, including: By formula , determine the stability evaluation index of the transmission line goaf area site ;in, It is the ultimate tensile strength of the bedrock layer in the curved moving zone of the goaf site.

2. The method for determining the stability of a power transmission line according to claim 1, characterized in that: According to the stability evaluation index and the preset evaluation standard, the stability of the transmission line in the current goaf site is determined, including: When the stability evaluation index is greater than 0 and less than 0.75, the stability of the transmission line in the current goaf site is determined to be unstable; When the stability evaluation index is greater than or equal to 0.75 and less than 1, the stability of the transmission line in the current goaf site is determined to be basically stable; When the stability evaluation index is greater than or equal to 1, the stability of the transmission line in the current goaf site is determined to be stable.

3. A device for determining the stability of a power transmission line, characterized in that: include: An acquisition module is used to acquire basic geographic information of the goaf site where the transmission line is located; A processing module is used to determine the maximum tensile stress of the bedrock layer of the curved moving zone of the goaf site according to the basic geographic information; determine the stability evaluation index of the goaf site of the transmission line according to the maximum tensile stress; determine the stability of the transmission line in the current goaf site according to the stability evaluation index and a preset evaluation standard; The basic geographic information of the goaf where the transmission line is located includes: Goaf mining width of goaf site , the thickness of the coal seam overburden , the thickness of the fracture zone of the collapse zone , Mobile influence angle , the bedrock weight of the curved moving zone , the weight of loose soil layer in the bending moving zone , the ultimate tensile strength of the bedrock layer in the curved moving zone of the goaf site and the thickness D of the loose soil layer in the curved moving zone; According to the basic geographic information, the maximum tensile stress of the bedrock layer in the curved moving zone of the goaf site is determined, including: According to the basic geographical information, determine the ultimate bending moment of the bedrock layer of the bending movement zone and the bending section coefficient of the bedrock layer ; By formula , determine the maximum tensile stress on the bedrock layer of the curved moving zone of the goaf site ; According to the basic geographical information, determine the ultimate bending moment of the bedrock layer of the bending movement zone ,include: Based on the basic geographic information, determine the equivalent uniformly distributed load on the bedrock layer of the curved moving zone and the rupture span L of the bedrock layer; By formula , determine the ultimate bending moment of the bedrock layer in the bending movement zone ; Based on the basic geographic information, determine the equivalent uniformly distributed load on the bedrock layer of the curved moving zone ,include: According to the basic geographical information, the formula , determine the equivalent uniformly distributed load on the bedrock layer of the bending movement zone ; in, is the thickness of the bedrock layer in the flexural movement zone, , is the thickness of the coal seam overburden, is the thickness of the fracture zone in the collapse zone, and D is the thickness of the loose soil layer in the bending movement zone; The bedrock weight of the flexural mobile zone; It is the weight of loose soil layer in the bending moving zone; According to the maximum tensile stress, the stability evaluation index of the transmission line goaf area is determined, including: By formula , determine the stability evaluation index of the transmission line goaf area site ;in, It is the ultimate tensile strength of the bedrock layer in the curved moving zone of the goaf site.

4. A computing device, characterized in that include: A processor and a memory storing a computer program, wherein when the computer program is executed by the processor, the method according to any one of claims 1 to 2 is performed.

5. A computer-readable storage medium, characterized in that: include: Instructions are stored, and when the instructions are executed on a computer, the computer is caused to execute the method according to any one of claims 1 to 2.

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