Design methods, devices, equipment and media for reinforcement parameters of surrounding rock of gas storage

Abstract

The present invention discloses a design method, device, equipment and medium for the reinforcement parameters of the surrounding rock of a gas storage reservoir, and relates to the field of energy storage technology. The present invention includes first determining the tensile cracking range of the surrounding rock based on the analysis of the stress conditions of the surrounding rock of the gas storage reservoir. And calculating the cross-sectional tension within the tensile cracking range. Then, based on the cross-sectional tension and the material parameters of the reinforced steel, determining the number of reinforcement strips in the radial cross section of the surrounding rock. Finally, based on the tensile cracking range and the number of reinforcement strips, determining the reinforcement construction plan for the surrounding rock. And according to the reinforcement construction plan, the surrounding rock of the gas storage reservoir can be reinforced. Therefore, through the reinforcement design of the anchor rod, the anchor rod itself can bear part of the tensile stress of the surrounding rock of the gas storage reservoir, so that the tensile strength of the surrounding rock of the gas storage reservoir is improved, and the risk of the surrounding rock of the gas storage reservoir being damaged under high internal pressure conditions is reduced, thereby improving the operating stability and service life of the gas storage reservoir.

Description

Technical Field

[0001] The invention relates to the technical field of energy storage, and in particular to a design method, device, equipment and medium for reinforcement parameters of surrounding rocks of a gas storage reservoir. Background Art

[0002] Compressed air energy storage power station is a new type of energy storage power station. It uses the excess electricity of the power system at low capacity load to compress air and store it in underground caves. It is then released when needed and generates electricity through generator sets to meet the needs of peak loads. Underground caves usually include natural salt caverns and artificial underground energy storage chambers. However, natural salt cavern gas storage is difficult to site due to the distribution of salt cavern resources. The gas storage device of a large-scale compressed air energy storage power station generally requires a larger gas storage capacity. Artificially excavated underground gas storage is considered to be a popularizable type of gas storage. For the artificial excavation and construction of underground gas storage in hard rock, the current mainstream design idea is that the sealing layer only ensures air tightness, and the high-pressure gas acts on the inner wall of the gas storage and is transmitted through the lining, and the surrounding rock mainly bears the high internal pressure.

[0003] However, underground rock is a material with defects such as joints, microcracks and pores. Under the influence of external loads and environmental factors, the original joints and microcracks in the rock will expand, and new cracks and fissures may be generated. At the same time, the maximum operating pressure of the gas storage is much greater than that of other similar underground projects. Considering the economic efficiency of the construction, the burial depth of the gas storage is generally shallow, which leads to part of the surrounding rock being in a three-dimensional tensile state during the operation of the gas storage. The tensile strength of the rock mass is generally much smaller than its compressive strength, and it is very easy to suffer from tensile failure, which greatly reduces the operational stability of the gas storage. Summary of the invention

[0004] In view of the above problems, the present invention is proposed to provide a method, device, equipment and medium for designing reinforcement parameters of surrounding rock of a gas storage reservoir that overcomes the above problems or at least partially solves the above problems.

[0005] Based on the first aspect of the present invention, a method for designing reinforcement parameters of surrounding rock of a gas storage reservoir is provided, the method comprising:

[0006] Determining the radial stress distribution relationship and the hoop stress distribution relationship of the surrounding rock along the radial direction of the gas storage reservoir according to the internal pressure value and the ground stress value of the gas storage reservoir;

[0007] Determining the tensile cracking range of the surrounding rock according to the radial stress distribution relationship, the hoop stress distribution relationship and the tensile strength of the surrounding rock;

[0008] Calculating the cross-sectional tensile force within the tensile crack range;

[0009] Determining the number of reinforcement strips in the radial cross section of the surrounding rock based on the cross-sectional tensile force and material parameters of the reinforcement steel;

[0010] According to the tensile cracking range and the number of reinforcement strips, the reinforcement construction plan of the surrounding rock is determined.

[0011] An optional invention content, determining the tensile cracking range of the surrounding rock based on the radial stress distribution relationship, the hoop stress distribution relationship and the tensile strength of the surrounding rock, includes:

[0012] According to the radial stress distribution relationship and the hoop stress distribution relationship, a radial stress change curve and a hoop stress change curve of the surrounding rock are drawn;

[0013] Based on the hoop stress variation curve and the stress analysis in the hoop stress variation curve, matching the target surrounding rock radius corresponding to the stress value being the same as the tensile strength of the surrounding rock;

[0014] The tensile fracture range of the surrounding rock is determined based on the inner diameter of the gas storage reservoir and the target surrounding rock radius.

[0015] An optional invention content, the calculating the cross-sectional tensile force within the tensile cracking range includes:

[0016] According to the tensile strength and the tearing range, an integral algorithm is used to calculate the cross-sectional tensile force within the tearing range.

[0017] An optional invention content, the determining the number of reinforcement strips in the radial cross section of the surrounding rock based on the cross-sectional tension and the material parameters of the reinforcement steel, includes:

[0018] Determine the total cross-sectional area of ​​the reinforced steel material required under the cross-sectional tension according to the material tensile strength of the reinforced steel material;

[0019] The number of reinforcement strips in the radial cross section of the surrounding rock is determined based on the total cross-sectional area of ​​the reinforcement steel and the cross-sectional area of ​​a single reinforcement steel.

[0020] An optional invention content, the basis for determining the number of reinforcement strips in the radial cross section of the surrounding rock based on the total cross-sectional area of ​​the reinforcement steel and the cross-sectional area of ​​a single reinforcement steel, includes:

[0021] Calculating the area ratio between the total cross-sectional area of ​​the reinforced steel and the cross-sectional area of ​​a single reinforced steel;

[0022] The area ratio is rounded upward to obtain the number of reinforcement strips in the radial cross section of the surrounding rock.

[0023] An optional invention content, the reinforcement construction scheme of the surrounding rock is determined according to the tensile cracking range and the number of reinforcement strips, including:

[0024] Determine the geometrical limiting relationship between the target surrounding rock radius, reinforcement length and reinforcement angle corresponding to the tensile cracking range under the number of reinforcement strips;

[0025] Based on the geometric limiting relationship, a reinforcement construction plan for the surrounding rock is determined.

[0026] An optional invention content, the reinforcement angle includes a first angle between the reinforcement and the vertical normal, and a circumferential spacing angle between two adjacent reinforcements;

[0027] The determining of the geometrical limiting relationship between the target surrounding rock radius, the reinforcement length and the reinforcement angle corresponding to the tensile cracking range under the number of reinforcement strips includes:

[0028] The geometrical limiting relationship among the target surrounding rock radius, reinforcement length, first angle and circumferential spacing angle corresponding to the tensile cracking range interval under the number of reinforcement strips is determined.

[0029] An optional invention content, determining the reinforcement construction scheme of the surrounding rock according to the geometric limiting relationship, includes:

[0030] According to the preset first angle, determine a plurality of reinforcement treatment schemes in which the first angle, reinforcement length and circumferential spacing angle satisfy the geometric limitation relationship;

[0031] A reinforcement construction scheme for the surrounding rock is selected from a variety of reinforcement treatment schemes.

[0032] An optional invention content, determining the reinforcement construction scheme of the surrounding rock according to the geometric limiting relationship, includes:

[0033] The first angle and the annular spacing angle are determined by using construction convenience rules;

[0034] Under the limitation of the geometric limitation relationship, the reinforcement length is determined according to the first angle and the annular spacing angle;

[0035] A reinforcement construction plan for the surrounding rock is generated based on the reinforcement length, the first angle and the circumferential spacing angle.

[0036] Based on the second aspect of the present invention, a design device for reinforcement parameters of surrounding rock of a gas storage reservoir is provided, the device comprising:

[0037] A relationship determination module, used to determine the radial stress distribution relationship and the hoop stress distribution relationship of the surrounding rock along the radial direction of the gas storage according to the internal pressure value and the ground stress value of the gas storage;

[0038] An interval determination module, used to determine the tensile cracking range interval of the surrounding rock according to the radial stress distribution relationship, the hoop stress distribution relationship and the tensile strength of the surrounding rock;

[0039] A tension calculation module, used to calculate the cross-sectional tension within the tensile crack range;

[0040] A strip number determination module, used to determine the number of reinforcement strips in the radial cross section of the surrounding rock based on the cross-sectional tension and the material parameters of the reinforcement steel;

[0041] The scheme determination module is used to determine the reinforcement construction scheme of the surrounding rock according to the tensile cracking range and the number of reinforcement strips.

[0042] In an optional invention, the interval determination module includes:

[0043] A curve drawing submodule is used to draw a radial stress variation curve and a radial variation curve of the surrounding rock according to the radial stress distribution relationship and the hoop stress distribution relationship;

[0044] A surrounding rock radius determination submodule, for matching a target surrounding rock radius corresponding to a stress value that is the same as the tensile strength of the surrounding rock based on the hoop stress variation curve and the stress analysis in the hoop stress variation curve;

[0045] The interval determination submodule is used to determine the tensile fracture range interval of the surrounding rock according to the inner diameter of the gas storage reservoir and the target surrounding rock radius.

[0046] According to a third aspect of the present invention, there is provided an electronic device, comprising:

[0047] one or more processors;

[0048] Memory;

[0049] One or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs are configured to execute any of the methods described in the above invention.

[0050] Based on the fourth aspect of the present invention, a computer-readable storage medium is provided, which stores a computer program used in conjunction with an electronic device, characterized in that the computer program can be executed by a processor to perform any of the methods described in the above invention content.

[0051] Compared with the prior art, the present invention includes first determining the tensile cracking range of the surrounding rock based on the stress analysis of the surrounding rock of the gas storage reservoir. And calculating the cross-sectional tension within the tensile cracking range. Then, based on the cross-sectional tension and the material parameters of the reinforced steel, determining the number of reinforcement strips in the radial cross section of the surrounding rock. Finally, according to the tensile cracking range and the number of reinforcement strips, determining the reinforcement construction plan of the surrounding rock. And according to the reinforcement construction plan, the surrounding rock of the gas storage reservoir can be reinforced. Therefore, through the reinforcement design of the anchor rod, the anchor rod itself can bear part of the tensile stress of the surrounding rock of the gas storage reservoir, so that the tensile strength and stability of the surrounding rock of the gas storage reservoir are higher. And through the design method of optimized reinforcement parameters, a suitable processing and construction plan can be determined to greatly improve the tensile strength of the surrounding rock of the gas storage reservoir. In this way, the risk of the surrounding rock of the gas storage reservoir being damaged under high internal pressure conditions can be reduced, and the operating stability and service life of the gas storage reservoir can be improved.

[0052] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limitations of the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings.

[0054] In the attached picture:

[0055] Figure 1 It is a schematic diagram of the steps of a method for designing reinforcement parameters of surrounding rock of a gas storage reservoir provided by an embodiment of the present invention;

[0056] Figure 2 It is a schematic diagram of the steps of another method for designing reinforcement parameters of surrounding rock of a gas storage reservoir provided by an embodiment of the present invention;

[0057] Figure 3 is a schematic diagram of a force analysis of surrounding rock provided by an embodiment of the present invention;

[0058] Figure 4 is a schematic diagram of a force distribution curve of surrounding rock provided by an embodiment of the present invention;

[0059] Figure 5 is a schematic diagram of cross-sectional tension of surrounding rock provided by an embodiment of the present invention;

[0060] Figure 6It is a construction schematic diagram of a surrounding rock reinforcement treatment solution provided by an embodiment of the present invention;

[0061] Figure 7 It is a structural block diagram of a device for designing reinforcement parameters of gas storage surrounding rocks provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0062] 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.

[0063] Compressed air energy storage power station is a new type of energy storage power station. It uses the excess electricity of the power system at low capacity load to compress air and store it in underground caves. It is then released when needed and generates electricity through generator sets to meet the needs of peak loads. Underground caves usually include natural salt caverns and artificial underground energy storage chambers. However, natural salt cavern gas storage is difficult to site due to the distribution of salt cavern resources. The gas storage device of a large-scale compressed air energy storage power station generally requires a larger gas storage capacity. Artificially excavated underground gas storage is considered to be a popularizable type of gas storage. For the artificial excavation and construction of underground gas storage in hard rock, the current mainstream design idea is that the sealing layer only ensures air tightness, and the high-pressure gas acts on the inner wall of the gas storage and is transmitted through the lining, and the surrounding rock mainly bears the high internal pressure.

[0064] However, underground rock is a material with defects such as joints, microcracks and pores. Under the influence of external loads and environmental factors, the original joints and microcracks in the rock will expand, and new cracks and fissures may be generated. At the same time, the maximum operating pressure of the gas storage is much greater than that of other similar underground projects. Considering the economic efficiency of the construction, the burial depth of the gas storage is generally shallow, which leads to part of the surrounding rock being in a three-dimensional tensile state during the operation of the gas storage. The tensile strength of the rock mass is generally much smaller than its compressive strength, and it is very easy to suffer from tensile failure, which greatly reduces the operational stability of the gas storage.

[0065] Based on the above technical problems, an embodiment of the present invention is proposed. For details, please refer to the following description of each method step corresponding to the embodiment of the present invention.

[0066] Reference Figure 1 , shows a method for designing reinforcement parameters of surrounding rock of a gas storage reservoir provided by an embodiment of the present invention, the method may include:

[0067] S101. Based on the stress analysis of the surrounding rock of the gas storage reservoir, determine the tensile fracture range of the surrounding rock.

[0068] In the embodiment of the present invention, the stress conditions of the surrounding rock of the gas storage reservoir can be obtained by pre-measurement and calculation. The stress conditions of the surrounding rock can include the internal pressure value acting on the surrounding rock in the gas storage reservoir and the ground stress value acting on the surrounding rock. For example, the inner diameter of a circular gas storage reservoir is =5m, the buried depth of the gas storage is h = 150m, and the rock mass density is 2500 In the case of = =3.75MPa (Megapascal). The internal pressure of the gas storage acting on the surrounding rock (It can also be understood as the maximum internal pressure value that the gas storage can reach during operation) is 10MPa. Therefore, the tensile cracking range of the surrounding rock can be determined by comprehensive analysis of the internal pressure value and the ground stress value. The tensile cracking range is used to characterize the distribution range of crack lengths generated by the surrounding rock under the action of the internal pressure of the gas storage without reinforcement.

[0069] S102, calculating the cross-sectional tensile force within the tensile tearing range.

[0070] S103. Determine the number of reinforcement strips in the radial cross section of the surrounding rock based on the cross-sectional tensile force and material parameters of the reinforcement steel.

[0071] In the embodiment of the present invention, after the tensile cracking range is determined, the tensile force per unit length in the tensile cracking range can be used. Considering the low tensile strength of the surrounding rock, it can be determined that after the microcracks of the surrounding rock are opened, the tensile force of the cross section is completely borne by the reinforced steel. Therefore, the number of reinforcement strips in the radial cross section of the surrounding rock can be determined completely by the material parameters and the tensile force of the cross section of the reinforced steel, so that the tensile strength provided by the reinforced steel (which can also be understood as an anchor rod) corresponding to the number of reinforcement strips is greater than the tensile force of the cross section.

[0072] S104, determining a reinforcement construction plan for the surrounding rock according to the tensile cracking range and the number of reinforcement strips.

[0073] In an embodiment of the present invention, the reinforcement construction plan at least includes data such as the reinforcement length, reinforcement angle, and reinforcement interval of the reinforced steel. For example, the geometric constraint relationship between the reinforcement length and the reinforcement angle can be calculated based on the radius of the target surrounding rock and the number of reinforcements corresponding to the cracking range interval, and a variety of reinforcement treatment schemes for the surrounding rock can be determined through the geometric constraint relationship. The reinforcement treatment scheme is used to meet specific construction requirements for given reinforcements. For example, it may include reinforcement length, reinforcement angle, and reinforcement interval. And one of the optimal reinforcement treatment schemes can be selected from the construction convenience as the final reinforcement construction scheme to reinforce the surrounding rock of the gas storage reservoir.

[0074] Therefore, through the reinforcement design of the anchor rod, the anchor rod itself can bear part of the tensile stress of the gas storage reservoir surrounding rock, making the tensile strength and stability of the gas storage reservoir surrounding rock higher. And through the design method of optimized reinforcement parameters, a suitable processing and construction plan can be determined to greatly improve the tensile strength of the gas storage reservoir surrounding rock. This can reduce the risk of gas storage reservoir surrounding rock being damaged under high internal pressure conditions and improve the operating stability and service life of the gas storage reservoir.

[0075] In summary, an embodiment of the present invention provides a design method for reinforcement parameters of gas storage reservoir surrounding rock. The embodiment of the present invention may include first determining the tensile cracking range of the surrounding rock based on the stress analysis of the gas storage reservoir surrounding rock. And calculating the cross-sectional tensile force within the tensile cracking range. Then, based on the cross-sectional tensile force and the material parameters of the reinforced steel, determining the number of reinforcement strips in the radial cross section of the surrounding rock. Finally, according to the tensile cracking range and the number of reinforcement strips, determining the reinforcement construction scheme of the surrounding rock. And according to the reinforcement construction scheme, the surrounding rock of the gas storage reservoir can be reinforced. Therefore, through the reinforcement design of the anchor rod, the anchor rod itself can bear part of the tensile stress of the surrounding rock of the gas storage reservoir, so that the tensile strength and stability of the surrounding rock of the gas storage reservoir are higher. And through the design method of optimized reinforcement parameters, a suitable processing and construction scheme can be determined to greatly improve the tensile strength of the surrounding rock of the gas storage reservoir. In this way, the risk of the surrounding rock of the gas storage reservoir being damaged under high internal pressure conditions can be reduced, and the operation stability and service life of the gas storage reservoir can be improved.

[0076] Reference Figure 2 , shows a method for designing reinforcement parameters of surrounding rock of a gas storage reservoir provided by an embodiment of the present invention, the method may include:

[0077] S201. Determine the radial stress distribution relationship and the annular stress distribution relationship of the surrounding rock along the radial direction of the gas storage reservoir based on the internal pressure value and the ground stress value of the gas storage reservoir.

[0078] In the embodiment of the present invention, the stress conditions of the surrounding rock of the gas storage reservoir can be obtained by pre-measurement and calculation. The stress conditions of the surrounding rock can include the internal pressure value of the gas storage reservoir acting on the surrounding rock, and the ground stress value acting on the surrounding rock. For example, the inner diameter of a circular gas storage reservoir is =5m, the buried depth of the gas storage is h = 150m, and the rock mass density is 2500 In the case of = =3.75MPa (Megapascal). The internal pressure of the gas storage acting on the surrounding rock (It can also be understood as the maximum internal pressure value that the gas storage can reach during operation) is 10MPa. Therefore, the tensile cracking range of the surrounding rock can be determined by comprehensive analysis of the internal pressure value and the ground stress value. The tensile cracking range is used to characterize the distribution range of crack lengths generated by the surrounding rock under the action of the internal pressure of the gas storage without reinforcement.

[0079] In some optional embodiments, the internal pressure and geostress to which the surrounding rock is subjected can be divided into radial stress and hoop stress of the surrounding rock along the radial direction of the gas storage reservoir, wherein the radial stress and hoop stress can be calculated and determined by the internal pressure value and the geostress value, respectively. For example, the radial stress and hoop stress to which the surrounding rock is subjected along the radial direction of the gas storage reservoir can be calculated according to the following formula:

[0080] Formula (1)

[0081] Formula (2)

[0082] In the above formula (1) and formula (2), It refers to the radial stress on the surrounding rock in the radial direction; It refers to the circumferential stress on the surrounding rock in the radial direction; Refers to the internal pressure value of the surrounding rock; Refers to the ground stress value of the surrounding rock; Refers to the inner diameter of the gas storage reservoir; refers to the outer diameter of the surrounding rock; r refers to the radius variable of the surrounding rock, which is greater than , and less than .

[0083] S202: Determine the tensile fracture range of the surrounding rock according to the radial stress distribution relationship, the hoop stress distribution relationship and the tensile strength of the surrounding rock.

[0084] Therefore, the radial stress change curve and the hoop stress change curve of the surrounding rock can be drawn according to the radial stress distribution relationship and the hoop stress distribution relationship, and based on the stress analysis of the hoop stress change curve and the hoop stress change curve, the target surrounding rock radius corresponding to the same stress value as the tensile strength of the surrounding rock can be matched. Figure 3As shown in the figure, considering the convenience of construction and engineering cost, the underground depth of the gas storage is shallow, and the corresponding ground stress is small. As a result, the circumferential stress of the surrounding rock close to the free surface (the surface in contact with the lining structure of the gas storage) is positive, which is the circumferential tensile stress zone. Due to the action of ground stress, the circumferential stress of the surrounding rock far away from the free surface is negative, that is, the circumferential compressive stress zone. Among them, when the stress value is negative, the corresponding stress causes the surrounding rock to be tensile, and when the stress value is positive, the corresponding stress causes the surrounding rock to be compressed.

[0085] Reference Figure 4 As shown, in the process of drawing the hoop stress change curve and the hoop stress change curve, the surrounding rock radius is used as the horizontal coordinate and the stress value is used as the vertical coordinate, wherein the radial stress value is a negative value and the hoop stress value gradually changes from positive to negative. Thus, after obtaining the tensile strength of the surrounding rock, for example, when the tensile strength f is 2MPa, in the hoop stress change curve, the stress value with the same tensile strength is matched, and the target surrounding rock radius corresponding to this stress value is determined. According to the inner diameter of the gas storage reservoir and the target surrounding rock radius, the tensile cracking range of the surrounding rock is determined.

[0086] For example, when the target surrounding rock radius is matched to be 5.5 m, the tensile fracture range of the surrounding rock is determined to be 5-5.5 m. The lower limit value of the length of the tensile cracking range is used as the target surrounding rock radius L of the tensile cracking range.

[0087] S203, calculating the cross-sectional tensile force within the tensile tearing range.

[0088] In the embodiment of the present invention, the cross-sectional tensile force within the tearing range can be calculated based on the tensile strength and the tearing range. Figure 5 As shown, the cross-sectional tensile force within the tearing range can be calculated using an integral algorithm based on the tensile strength and the tearing range. Thus, the cross-sectional tensile force can be used to characterize the resultant tensile force on the surrounding rock cross section within the tearing range. For example, the cross-sectional tensile force can be calculated using the following definite integral:

[0089] Formula (3)

[0090] In the above formula (3), refers to -L is the cross-sectional tensile force in the tensile crack range. dr is the microelement of the surrounding rock radius r, where the surrounding rock radius r ranges from For example, in the tensile tearing range of 5m-5.5m, when the radial stress value is 2Ma, the cross-sectional tensile force in the tensile tearing range is calculated to be 0.5MN (meganewton).

[0091] S204. Determine the number of reinforcement strips in the radial cross section of the surrounding rock based on the cross-sectional tensile force and material parameters of the reinforcement steel.

[0092] In the embodiment of the present invention, considering that the tensile strength of the surrounding rock is low, it can be determined that after the microcracks of the surrounding rock are opened, the cross-sectional tensile force is completely borne by the reinforced steel. Therefore, the number of reinforcement strips in the radial cross section of the surrounding rock can be determined completely by the material parameters of the reinforced steel and the cross-sectional tensile force, so that the tensile strength provided by the reinforced steel corresponding to the number of reinforcement strips is greater than the cross-sectional tensile force.

[0093] In some optional embodiments of the invention, the total cross-sectional area of ​​the reinforced steel required under the cross-sectional tension can be determined based on the tensile strength of the reinforced steel material, and the number of reinforcement strips in the radial cross section of the surrounding rock can be determined based on the total cross-sectional area of ​​the reinforced steel and the cross-sectional area of ​​a single reinforced steel.

[0094] In the embodiment of the present invention, considering that steel is usually used as the material used for reinforcement, the physical parameters corresponding to a single reinforced steel can be obtained. For example, the physical parameters include the tensile strength and cross-sectional area of ​​the material. Or the physical parameters may include tensile strength and steel diameter, etc. For example, when the diameter of a single reinforced steel is 40 mm, the cross-sectional area of ​​the single reinforced steel can be calculated to be 0.00126 by the area calculation formula of a circle. Among them, the tensile strength of the material can be 300 In order to ensure that the reinforced steel can fully bear the cross-sectional tensile force, the total cross-sectional area of ​​the steel corresponding to the number of reinforcement strips required for the radial section is the cross-sectional tensile force. The ratio of the tensile strength of the steel material to the total cross-sectional area of ​​the reinforced steel material is obtained. When the tensile strength of a single reinforced steel is 0.5MN, the tensile strength of the steel is 300 In the case of .

[0095] Then, the area ratio between the total cross-sectional area of ​​the reinforced steel and the cross-sectional area of ​​a single reinforced steel is calculated to determine the number of reinforcement strips in the radial cross-sectional area of ​​the surrounding rock. , then the area ratio is determined to be 1.33. Considering that the reinforcing steel will not be cut during the reinforcement process, and it is necessary to ensure that the tensile strength provided by all reinforcing steel is greater than the cross-sectional tensile force. Therefore, the calculated area ratio is rounded up (it can also be understood as rounding to a larger integer). Thus, the number of reinforcement strips in the radial section of the surrounding rock is obtained. For example, when the area ratio is 1.33, the number of reinforcement strips is determined to be 2.

[0096] S205, determining a geometrically defined relationship between a target surrounding rock radius, a reinforcement length, and a reinforcement angle corresponding to the tensile cracking range under the number of reinforcement strips.

[0097] S206. Determine a reinforcement construction plan for the surrounding rock based on the geometric limiting relationship.

[0098] In an embodiment of the present invention, the reinforcement treatment scheme at least includes data such as the reinforcement length and reinforcement angle of the reinforced steel, and the reinforcement interval. For example, the geometric constraint relationship between the reinforcement length and the reinforcement angle can be calculated based on the radius of the target surrounding rock and the number of reinforcement strips corresponding to the tensile range interval, and the reinforcement treatment scheme of the surrounding rock can be determined through the geometric constraint relationship. And the surrounding rock of the gas storage reservoir can be reinforced according to the reinforcement construction plan. Thereby, the structural stability of the gas storage reservoir after construction can be ensured, and the surrounding rock can be prevented from being tensilely damaged during the operation of the gas storage reservoir, and the lining of the gas storage reservoir can be damaged.

[0099] In an optional embodiment of the invention, referring to Figure 6 As shown, the reinforcement angle may include a first angle between the reinforcement and the vertical normal, and an annular spacing angle between two adjacent reinforcements. Thus, the geometrical limiting relationship between the target surrounding rock radius, reinforcement length, first angle and annular spacing angle corresponding to the tensile cracking range under the number of reinforcements may be determined. For example, the geometrical limiting relationship may be obtained as shown in the following formulas (4) and (5).

[0100] Formula (4)

[0101] Formula (5)

[0102] In the above formula (4) and formula (5), It refers to the first angle between the reinforcement and the vertical normal; L is the target surrounding rock radius, is the inner diameter of the gas storage reservoir, is the reinforcement length, Refers to the annular spacing angle. Wherein, the formula (4) is obtained by the geometric cosine theorem; the formula (5) is obtained based on the fact that the reinforcement length should exceed the tensile stress zone range.

[0103] In some optional implementations, under the constraints of the above formulas (4) and (5), the values ​​of the first angle, the reinforcement length, and the annular spacing angle may not be unique. Therefore, the angle value of the first angle can be predetermined based on the premise of construction feasibility. Then, the angle value of the first angle is substituted into the geometric constraint relationship to determine a plurality of reinforcement treatment schemes in which the first angle, the reinforcement length, and the annular spacing angle satisfy the geometric constraint relationship.

[0104] For example, when the first angle is preset to 75°, all reinforcement lengths and all circumferential spacing angles that meet the geometric limitation relationship are obtained, and multiple reinforcement treatment schemes are generated. The reinforcement treatment scheme is used for specific construction requirements of given reinforcements. For example, the reinforcement treatment scheme may include reinforcement length, first angle, and circumferential spacing angle. For another example, when the reinforcement length is increased by 0.1 cm each time, all circumferential spacing angles that meet the geometric limitation relationship are obtained, and multiple reinforcement treatment schemes are generated based on the preset first angle, reinforcement length, and circumferential spacing angle. For another example, when the circumferential spacing angle is increased by 1° each time, all reinforcement lengths that meet the geometric limitation relationship are obtained, and multiple reinforcement treatment schemes are generated based on the preset first angle, reinforcement length, and circumferential spacing angle.

[0105] Therefore, any one of the above reinforcement treatment schemes can be selected as the reinforcement construction scheme for the surrounding rock.

[0106] In other preferred embodiments of the invention, the first angle and the circumferential spacing angle can be determined by using construction convenience rules. The construction convenience rules can be rules pre-set by technicians in this field according to the actual construction difficulty, which can include a predetermined first angle and a circumferential spacing angle. Therefore, under the limitation of the geometric limitation relationship, the reinforcement length is determined according to the first angle and the circumferential spacing angle. Then, based on the reinforcement length, the first angle and the circumferential spacing angle, a reinforcement construction plan for the surrounding rock is generated.

[0107] For example, when the first angle is 75° and the circumferential angle interval of the reinforcement is 5°, the reinforcement length of the surrounding rock is calculated according to the above formula (4) to be 7.9m. Substituting it into formula (5), the left side of formula (5) is 5.3, which is less than the right side of formula (5) of 5.5m, meeting the requirements of the above geometric limitation relationship. Therefore, the reinforcement construction plan finally obtained can be: the reinforcement length is greater than 7.9m, the first angle is 75°, and the circumferential spacing angle between the two reinforcements is 5°.

[0108] In summary, an embodiment of the present invention provides a design method for reinforcement parameters of gas storage reservoir surrounding rock. The embodiment of the present invention may include first determining the tensile cracking range of the surrounding rock based on the stress analysis of the gas storage reservoir surrounding rock. And calculating the cross-sectional tensile force within the tensile cracking range. Then, based on the cross-sectional tensile force and the material parameters of the reinforced steel, determining the number of reinforcement strips in the radial cross section of the surrounding rock. Finally, according to the tensile cracking range and the number of reinforcement strips, determining the reinforcement construction scheme of the surrounding rock. And according to the reinforcement construction scheme, the surrounding rock of the gas storage reservoir can be reinforced. Therefore, through the reinforcement design of the anchor rod, the anchor rod itself can bear part of the tensile stress of the surrounding rock of the gas storage reservoir, so that the tensile strength and stability of the surrounding rock of the gas storage reservoir are higher. And through the design method of optimized reinforcement parameters, a suitable processing and construction scheme can be determined to greatly improve the tensile strength of the surrounding rock of the gas storage reservoir. In this way, the risk of the surrounding rock of the gas storage reservoir being damaged under high internal pressure conditions can be reduced, and the operation stability and service life of the gas storage reservoir can be improved.

[0109] It should be noted that, for the method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present application are not limited by the described order of actions, because according to the embodiments of the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present application.

[0110] Reference Figure 7 , shows a design device for reinforcement parameters of surrounding rock of a gas storage reservoir provided by an embodiment of the present invention, the device may include:

[0111] The relationship determination module 701 is used to determine the radial stress distribution relationship and the hoop stress distribution relationship of the surrounding rock along the radial direction of the gas storage according to the internal pressure value and the ground stress value of the gas storage;

[0112] An interval determination module 702 is used to determine the tensile cracking range interval of the surrounding rock according to the radial stress distribution relationship, the hoop stress distribution relationship and the tensile strength of the surrounding rock;

[0113] The tension calculation module 703 is used to calculate the cross-sectional tension within the tearing range.

[0114] The strip number determination module 704 is used to determine the number of reinforcement strips in the radial cross section of the surrounding rock based on the cross-sectional tension and the material parameters of the reinforcement steel.

[0115] The scheme determination module 705 is used to determine the reinforcement construction scheme of the surrounding rock according to the tensile cracking range and the number of reinforcement strips.

[0116] In an optional embodiment of the invention, the interval determination module 702 includes:

[0117] The curve drawing submodule is used to draw the radial stress variation curve and the radial variation curve of the surrounding rock according to the radial stress distribution relationship and the annular stress distribution relationship.

[0118] The surrounding rock radius determination submodule is used to match the target surrounding rock radius corresponding to the same stress value as the tensile strength of the surrounding rock based on the annular stress change curve and the stress analysis in the annular stress change curve.

[0119] The interval determination submodule is used to determine the tensile fracture range interval of the surrounding rock according to the inner diameter of the gas storage reservoir and the target surrounding rock radius.

[0120] In an optional embodiment of the invention, the tension calculation module 703 is further used for:

[0121] According to the tensile strength and the tearing range, an integral algorithm is used to calculate the cross-sectional tensile force within the tearing range.

[0122] In an optional embodiment of the invention, the number determination module 704 may include:

[0123] The area determination submodule is used to determine the total cross-sectional area of ​​the reinforced steel material required under the cross-sectional tension according to the material tensile strength of the reinforced steel material.

[0124] The number determination submodule is used to determine the number of reinforcement strips in the radial cross section of the surrounding rock based on the total cross-sectional area of ​​the reinforcement steel and the cross-sectional area of ​​a single reinforcement steel.

[0125] In an optional embodiment of the invention, the number of entries determining submodule is further used for:

[0126] The area ratio between the total cross-sectional area of ​​the reinforced steel and the cross-sectional area of ​​a single reinforced steel is calculated.

[0127] The area ratio is rounded upward to obtain the number of reinforcement strips in the radial cross section of the surrounding rock.

[0128] In an optional embodiment of the invention, the solution determination module 705 includes:

[0129] The geometric relationship determination submodule is used to determine the geometric limitation relationship between the target surrounding rock radius, reinforcement length and reinforcement angle corresponding to the tensile cracking range under the number of reinforcement strips.

[0130] The scheme determination submodule is used to determine the reinforcement construction scheme of the surrounding rock according to the geometric limiting relationship.

[0131] In an optional embodiment of the invention, the reinforcement angle includes a first angle between the reinforcement and the vertical normal, and a circumferential spacing angle between two adjacent reinforcements. The geometric relationship determination submodule is also used for:

[0132] The geometrical limiting relationship among the target surrounding rock radius, reinforcement length, first angle and circumferential spacing angle corresponding to the tensile cracking range interval under the number of reinforcement strips is determined.

[0133] In an optional embodiment of the invention, the scheme determination submodule is further used for:

[0134] According to the preset first angle, multiple reinforcement treatment schemes are determined in which the first angle, reinforcement length and circumferential spacing angle satisfy the geometric limitation relationship.

[0135] A reinforcement construction scheme for the surrounding rock is selected from a variety of reinforcement treatment schemes.

[0136] In an optional embodiment of the invention, the scheme determination submodule is further used for:

[0137] The first angle and the circumferential spacing angle are determined using construction convenience rules.

[0138] Under the limitation of the geometric limitation relationship, the reinforcement length is determined according to the first angle and the annular spacing angle.

[0139] A reinforcement construction plan for the surrounding rock is generated based on the reinforcement length, the first angle and the circumferential spacing angle.

[0140] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0141] It is easy for a person skilled in the art to think that any combination of the above embodiments is feasible, so any combination of the above embodiments is an implementation scheme of the present invention. However, due to space limitations, this specification will not describe them in detail here.

[0142] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0143] Similarly, it should be understood that in order to streamline the present invention and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the intention that the claimed invention requires more features than those expressly recited in each claim. Rather, as reflected in the claims, inventive aspects lie in less than all of the features of the individual embodiments previously disclosed. Therefore, the claims that follow the detailed description are hereby expressly incorporated into the detailed description, with each claim itself serving as a separate embodiment of the present invention.

[0144] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and further may be divided into a plurality of submodules or subunits or subcomponents. All features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device so disclosed may be combined in any combination, except that at least some of such features and / or processes or units are mutually exclusive. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature that provides the same, equivalent or similar purpose.

[0145] An electronic device, comprising:

[0146] one or more processors;

[0147] Memory;

[0148] One or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs are configured to execute the method described in the above embodiment.

[0149] A computer-readable storage medium stores a computer program used in combination with an electronic device, wherein the computer program can be executed by a processor to implement the method described in the above embodiment.

[0150] A computer program product includes a computer program / computer executable instructions, wherein the computer program / computer executable instructions, when executed by a processor in an electronic device, implements the method described in any one of the above-mentioned embodiments of the invention.

[0151] It should be understood by those skilled in the art that the embodiments of the present invention can be provided as methods, devices, or computer program products. Therefore, the embodiments of the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the embodiments of the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0152] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0153] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0154] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0155] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0156] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0157] The above is a detailed introduction to a design method for gas storage reservoir surrounding rock reinforcement parameters and a design device for gas storage reservoir surrounding rock reinforcement parameters provided by the present invention. Specific examples are used in this article to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for general technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for designing reinforcement parameters of surrounding rock of a gas storage reservoir, characterized in that: The method comprises: Determining the radial stress distribution relationship and the hoop stress distribution relationship of the surrounding rock along the radial direction of the gas storage reservoir according to the internal pressure value and the ground stress value of the gas storage reservoir; According to the radial stress distribution relationship and the hoop stress distribution relationship, a radial stress variation curve and a hoop stress radial variation curve of the surrounding rock are drawn; Based on the hoop stress variation curve and the stress analysis in the hoop stress variation curve, matching the target surrounding rock radius corresponding to the stress value being the same as the tensile strength of the surrounding rock; Determining the tensile cracking range of the surrounding rock according to the inner diameter of the gas storage reservoir and the radius of the target surrounding rock; Calculating the cross-sectional tensile force within the tensile crack range; Determining the number of reinforcement strips in the radial cross section of the surrounding rock based on the cross-sectional tensile force and material parameters of the reinforcement steel; Determine the geometrical limiting relationship between the target surrounding rock radius, reinforcement length and reinforcement angle corresponding to the tensile cracking range under the number of reinforcement strips; Based on the geometric limiting relationship, a reinforcement construction plan for the surrounding rock is determined.

2. The method for designing reinforcement parameters of surrounding rock of gas storage according to claim 1 is characterized in that: The calculating of the cross-sectional tensile force within the tensile cracking range includes: According to the tensile strength and the tearing range, an integral algorithm is used to calculate the cross-sectional tensile force within the tearing range.

3. The design method of gas storage surrounding rock reinforcement parameters according to claim 1 is characterized in that: The determining the number of reinforcement strips in the radial cross section of the surrounding rock based on the cross-sectional tension and the material parameters of the reinforcement steel comprises: Determine the total cross-sectional area of ​​the reinforced steel material required under the cross-sectional tension according to the material tensile strength of the reinforced steel material; The number of reinforcement strips in the radial cross section of the surrounding rock is determined based on the total cross-sectional area of ​​the reinforcement steel and the cross-sectional area of ​​a single reinforcement steel.

4. The design method of gas storage surrounding rock reinforcement parameters according to claim 3 is characterized in that: The method of determining the number of reinforcement strips in the radial cross section of the surrounding rock based on the total cross-sectional area of ​​the reinforcement steel and the cross-sectional area of ​​a single reinforcement steel comprises: Calculating the area ratio between the total cross-sectional area of ​​the reinforced steel and the cross-sectional area of ​​a single reinforced steel; The area ratio is rounded upward to obtain the number of reinforcement strips in the radial cross section of the surrounding rock.

5. The method for designing reinforcement parameters of surrounding rock of gas storage according to claim 1 is characterized in that: The reinforcement angle includes a first angle between the reinforcement and the vertical normal, and a circumferential spacing angle between two adjacent reinforcements; The determining of the geometrical limiting relationship between the target surrounding rock radius, the reinforcement length and the reinforcement angle corresponding to the tensile cracking range under the number of reinforcement strips includes: The geometrical limiting relationship among the target surrounding rock radius, reinforcement length, first angle and circumferential spacing angle corresponding to the tensile cracking range interval under the number of reinforcement strips is determined.

6. The method for designing reinforcement parameters of surrounding rock of a gas storage reservoir according to claim 5 is characterized in that: Determining the reinforcement construction scheme of the surrounding rock based on the geometric limiting relationship includes: According to the preset first angle, determine a plurality of reinforcement treatment schemes in which the first angle, reinforcement length and circumferential spacing angle satisfy the geometric limitation relationship; A reinforcement construction scheme for the surrounding rock is selected from a variety of reinforcement treatment schemes.

7. The method for designing reinforcement parameters of surrounding rock of a gas storage reservoir according to claim 5, characterized in that: Determining the reinforcement construction scheme of the surrounding rock based on the geometric limiting relationship includes: The first angle and the annular spacing angle are determined by using construction convenience rules; Under the limitation of the geometric limitation relationship, the reinforcement length is determined according to the first angle and the annular spacing angle; A reinforcement construction plan for the surrounding rock is generated based on the reinforcement length, the first angle and the circumferential spacing angle.

8. A design device for reinforcement parameters of surrounding rock of a gas storage reservoir, characterized in that: The device comprises: A relationship determination module, used to determine the radial stress distribution relationship and the hoop stress distribution relationship of the surrounding rock along the radial direction of the gas storage according to the internal pressure value and the ground stress value of the gas storage; An interval determination module is used to draw a radial stress variation curve and a radial variation curve of the surrounding rock according to the radial stress distribution relationship and the hoop stress distribution relationship; The interval determination module is further used to match the target surrounding rock radius corresponding to the same stress value as the tensile strength of the surrounding rock based on the hoop stress change curve and the stress analysis in the hoop stress change curve; The interval determination module is further used to determine the tensile cracking range interval of the surrounding rock according to the inner diameter of the gas storage reservoir and the radius of the target surrounding rock; A tension calculation module, used to calculate the cross-sectional tension within the tensile crack range; A strip number determination module, used to determine the number of reinforcement strips in the radial cross section of the surrounding rock based on the cross-sectional tension and the material parameters of the reinforcement steel; A scheme determination module is used to determine the geometrical limiting relationship between the target surrounding rock radius, reinforcement length and reinforcement angle corresponding to the tensile cracking range under the number of reinforcement strips; The scheme determination module is also used to determine the reinforcement construction scheme of the surrounding rock according to the geometric limiting relationship.

9. An electronic device, characterized in that: include: one or more processors; Memory; One or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs are configured to execute the method according to any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program for use in conjunction with an electronic device, characterized in that: The computer program can be executed by a processor to implement the method according to any one of claims 1 to 7.

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