Method and device for predicting normal displacement of soft rock joint surface, electronic equipment and medium

Abstract

The application provides a method and device for predicting normal displacement of soft rock joint surface, electronic equipment and medium. The method comprises the following steps: firstly, determining residual shear dilation angle of the joint surface and displacement maximum value of the soft rock in the elastic stage; if the shear displacement is less than or equal to the displacement maximum value of the soft rock in the elastic stage, determining the first joint surface closure displacement according to the shear displacement and the shear closure coefficient, and obtaining the predicted joint surface normal displacement; if the shear displacement is greater than the displacement maximum value of the soft rock in the elastic stage, determining the opening displacement caused by the joint surface climbing effect according to the shear displacement, the normal stress, the residual shear dilation angle and the displacement maximum value of the soft rock in the elastic stage; determining the second joint surface closure displacement according to the opening displacement and the shear closure coefficient; and taking the sum of the opening displacement caused by the joint surface climbing effect and the second joint surface closure displacement as the predicted joint surface normal displacement. The application can predict the joint surface normal displacement according to the size of the shear displacement.

Description

Technical Field

[0001] This invention relates to the field of engineering rock mass joint technology, and more specifically, to a method, device, electronic equipment, and medium for predicting the normal displacement of soft rock joint surfaces. Background Technology

[0002] Predicting joint dilatation behavior requires a quantitative assessment of surface roughness; therefore, obtaining the joint surface roughness is fundamental to establishing a theoretical model for predicting joint dilatation behavior. To predict joint roughness, scholars both domestically and internationally have proposed a series of three-dimensional roughness indices, such as Grasselli1, Belem2, Tang3, and Xia Caichu4. In comparison, the three-dimensional roughness index proposed by Xia Caichu has the advantages of fewer parameters and clear physical meaning.

[0003] However, we found that the three-dimensional roughness index proposed by Xia Caichu mainly uses empirical models and qualitatively describes the trend of normal displacement-shear displacement change, but does not have the ability to predict the change of joint surface normal displacement with shear displacement. Moreover, since the mechanical parameters of different rock types are different, the prediction results are also different. This method cannot distinguish the applicable range of soft rock and hard rock. In other words, this method cannot accurately predict the normal displacement of soft rock joint surface. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a method, device, electronic device and medium for predicting the normal displacement of joint surfaces in soft rock, which can predict the normal displacement of joint surfaces based on the magnitude of shear displacement.

[0005] In a first aspect, embodiments of this application provide a method for predicting the normal displacement of soft rock joint surfaces, the method comprising:

[0006] Obtain the shear displacement, shear closure factor, normal stress, and basic friction angle of the joint surface in soft rock.

[0007] Based on the normal stress and the basic friction angle, determine the residual dilatation angle of the joint surface and the maximum displacement of soft rock in the elastic stage;

[0008] If the shear displacement is less than or equal to the maximum displacement of soft rock in the elastic stage, then the closing displacement of the first joint surface is determined based on the shear displacement and the shear closure coefficient; and the closing displacement of the first joint surface is determined as the predicted normal displacement of the joint surface.

[0009] If the shear displacement is greater than the maximum displacement of soft rock in the elastic stage, then the opening displacement caused by the joint surface climbing action is determined based on the shear displacement, normal stress, residual dilatation angle and the maximum displacement of soft rock in the elastic stage.

[0010] The closing displacement of the second joint surface is determined based on the opening displacement and the shear closure coefficient.

[0011] The sum of the opening displacement caused by the climbing action of the joint surface and the closing displacement of the second joint surface is calculated to obtain the predicted normal displacement of the joint surface.

[0012] In one possible implementation, the residual dilatation angle of the joint surface is determined based on the normal stress and the fundamental friction angle, including:

[0013] Based on the normal stress and the maximum effective tilt angle of the joint element along the shear direction, determine the minimum apparent tilt angle of the contact joint element under normal stress.

[0014] The shear brittleness coefficient is determined based on the maximum value of the normal stress, the basic friction angle, and the effective inclination angle of the joint surface micro-element along the shear direction;

[0015] The residual dilatation angle is determined based on the minimum apparent tilt angle and the shear brittleness coefficient.

[0016] In one possible implementation, determining the minimum apparent tilt angle and shear brittleness coefficient includes:

[0017] Calculate the minimum apparent tilt angle using the following formula;

[0018]

[0019] The shear brittleness coefficient is calculated using the following formula;

[0020]

[0021]

[0022] in, For the minimum viewing tilt angle, σ n For normal stress, σ c Let A0 be the uniaxial compressive strength, A0 be the ratio of the equivalent dip angle of all joint surface elements greater than 0 to the total area of ​​the joint surfaces, and C be the formula fitting coefficient. Let be the maximum effective dip angle of the joint element along the shear direction, and b be the shear brittleness coefficient. The basic friction angle, The average apparent tilt angle of the joint surface in actual contact with the joint micro-protrusion.

[0023] In one possible implementation, determining the residual dilatation angle based on the minimum apparent tilt angle and the shear brittleness coefficient includes:

[0024] The residual dilatation angle is calculated using the following formula;

[0025]

[0026] Among them, i mr For residual shear dilatation angle, denoted as minimum apparent tilt angle, and b as shear brittleness coefficient.

[0027] In one possible implementation, the maximum displacement of soft rock in the elastic stage is determined based on the normal stress and the fundamental friction angle, including:

[0028] The maximum displacement of soft rock in the elastic stage can be calculated using the following formula;

[0029]

[0030] in, This represents the maximum displacement of soft rock in the elastic stage.

[0031] In one possible implementation, determining the first joint surface closure displacement based on the shear displacement and the shear closure coefficient includes:

[0032] Calculate the closure displacement of the first section plane using the following formula;

[0033]

[0034] Where, δ v1 Let 'a' be the displacement of the first plane closure, and 'a' be the shear closure coefficient. For shear displacement, i m0 This represents the maximum possible dilatation angle during the elastic stage of soft rock.

[0035] In one possible implementation, determining the opening displacement caused by the joint climbing action and the second joint surface closing displacement includes:

[0036] The opening displacement caused by the joint climbing effect can be calculated using the following formula;

[0037]

[0038] Where, δ v2 This refers to the opening displacement caused by the joint's climbing action. Let i be the shear displacement, k be the wear rate constant, and i be the wear rate constant. m0 i represents the maximum possible dilatation angle in the elastic stage of soft rock. mr For the residual shear dilatation angle, σ n For normal stress, σ c For uniaxial compressive strength, δ r The displacement at the preset residual stress. This represents the maximum displacement of soft rock in the elastic stage.

[0039] Calculate the closed displacement of the second section surface using the following formula;

[0040] δ v3 =aδ v2 ;

[0041] Where, δ v3 Let be the displacement of the second section plane closure, and 'a' be the shear closure coefficient.

[0042] Secondly, embodiments of this application also provide a device for predicting the normal displacement of soft rock joint surfaces, the device comprising:

[0043] The acquisition module is used to acquire the shear displacement, shear closure coefficient, normal stress, and basic friction angle of the joint surface in soft rock.

[0044] The determination module is used to determine the residual dilatation angle of the joint surface and the maximum displacement of soft rock in the elastic stage based on the normal stress and the basic friction angle.

[0045] The determination module is also used to determine the first joint surface closure displacement based on the shear displacement and the shear closure coefficient if the shear displacement is less than or equal to the maximum displacement of soft rock in the elastic stage; and to determine the first joint surface closure displacement as the predicted joint surface normal displacement.

[0046] The determination module is also used to determine the opening displacement caused by the climbing action of the joint surface if the shear displacement is greater than the maximum displacement of soft rock in the elastic stage, based on the shear displacement, normal stress, residual dilatation angle and the maximum displacement of soft rock in the elastic stage.

[0047] The determination module is also used to determine the second joint surface closure displacement based on the opening displacement and the shear closure coefficient;

[0048] The calculation module is used to calculate the sum of the opening displacement caused by the joint climbing action and the closing displacement of the second joint surface, so as to obtain the predicted joint surface normal displacement.

[0049] In one possible implementation, the determining module is specifically used to determine the minimum apparent tilt angle of the contact joint element under normal stress based on the normal stress and the maximum value of the effective tilt angle of the joint element along the shear direction; to determine the shear brittleness coefficient based on the normal stress, the basic friction angle, and the maximum value of the effective tilt angle of the joint surface element along the shear direction; and to determine the residual dilatation angle based on the minimum apparent tilt angle and the shear brittleness coefficient.

[0050] In one possible implementation, the determining module is specifically used to calculate the minimum apparent tilt angle using the following formula; The shear brittleness coefficient is calculated using the following formula; in, For the minimum viewing tilt angle, σ n For normal stress, σ c Let A0 be the uniaxial compressive strength, A0 be the ratio of the equivalent dip angle of all joint surface elements greater than 0 to the total area of ​​the joint surfaces, and C be the formula fitting coefficient. Let be the maximum effective dip angle of the joint element along the shear direction, and b be the shear brittleness coefficient. The basic friction angle, The average apparent tilt angle of the joint surface in actual contact with the joint micro-protrusion.

[0051] In one possible implementation, the determining module is specifically used to calculate the residual dilatation angle using the following formula; Among them, i mr For residual shear dilatation angle, denoted as minimum apparent tilt angle, and b as shear brittleness coefficient.

[0052] In one possible implementation, the determining module is specifically used to calculate the maximum displacement of soft rock in the elastic stage using the following formula; in, This represents the maximum displacement of soft rock in the elastic stage.

[0053] In one possible implementation, the determining module is specifically used to calculate the first joint plane closure displacement using the following formula; Where, δ v1 Let 'a' be the displacement of the first plane closure, and 'a' be the shear closure coefficient. For shear displacement, i m0 This represents the maximum possible dilatation angle during the elastic stage of soft rock.

[0054] In one possible implementation, the determining module is specifically used to calculate the opening displacement caused by the joint climbing effect using the following formula;

[0055]

[0056] Where, δ v2 This refers to the opening displacement caused by the joint's climbing action. Let i be the shear displacement, k be the wear rate constant, and i be the wear rate constant. m0 i represents the maximum possible dilatation angle in the elastic stage of soft rock. mr For the residual shear dilatation angle, σ n For normal stress, σ c For uniaxial compressive strength, δ r The displacement at the preset residual stress. The maximum displacement of soft rock in the elastic stage is given by the following formula; the closing displacement of the second joint surface is calculated using the formula: δ v3 =aδ v2 ; where δ v3 denoted as the joint surface closure displacement, and 'a' as the shear closure coefficient.

[0057] Thirdly, embodiments of this application also provide an electronic device, including: a processor, a storage medium, and a bus. The storage medium stores machine-readable instructions executable by the processor. When the electronic device is running, the processor communicates with the storage medium via the bus, and the processor executes the machine-readable instructions to perform the steps of the method for predicting the normal displacement of soft rock joint surfaces as described in any of the first aspects.

[0058] Fourthly, embodiments of this application also provide a computer-readable storage medium storing a computer program, which, when run by a processor, performs the steps of the method for predicting the normal displacement of soft rock joint surfaces as described in any of the first aspects.

[0059] This application provides a method, apparatus, electronic device, and medium for predicting the normal displacement of soft rock joint surfaces. The method includes: acquiring the shear displacement, shear closure coefficient, normal stress, and basic friction angle of the soft rock joint surface; determining the residual dilatation angle and the maximum displacement of the soft rock in the elastic stage based on the normal stress and the basic friction angle; if the shear displacement is less than or equal to the maximum displacement of the soft rock in the elastic stage, determining the first joint surface closure displacement based on the shear displacement and the shear closure coefficient; and determining the first joint surface closure displacement as the predicted joint surface normal displacement; if the shear displacement is greater than the maximum displacement of the soft rock in the elastic stage, determining the opening displacement caused by the joint surface climbing action based on the shear displacement, normal stress, residual dilatation angle, and the maximum displacement of the soft rock in the elastic stage; determining the second joint surface closure displacement based on the opening displacement and the shear closure coefficient; and calculating the sum of the opening displacement caused by the joint surface climbing action and the second joint surface closure displacement to obtain the predicted joint surface normal displacement. When the shear displacement is less than or equal to the maximum displacement of soft rock in the elastic stage, this application determines the first joint surface closure displacement as the predicted joint surface normal displacement; when the shear displacement is greater than the maximum displacement of soft rock in the elastic stage, the sum of the opening displacement caused by the joint surface climbing action and the second joint surface closure displacement is determined as the predicted joint surface normal displacement; it can predict the joint surface normal displacement based on the magnitude of the shear displacement. Attached Figure Description

[0060] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0061] Figure 1 A flowchart of a method for predicting the normal displacement of a soft rock joint surface, provided in an embodiment of this application, is shown.

[0062] Figure 2 A flowchart is shown for another method for predicting the normal displacement of soft rock joint surfaces provided in an embodiment of this application;

[0063] Figure 3 A schematic diagram of the structure of a device for predicting the normal displacement of a soft rock joint surface provided in an embodiment of this application is shown;

[0064] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of this application is shown. Detailed Implementation

[0065] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the accompanying drawings in this application are for illustrative and descriptive purposes only and are not intended to limit the scope of protection of this application. Furthermore, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of this application. It should be understood that the operations in the flowcharts may not be implemented in sequence, and steps without logical contextual relationships may be reversed or implemented simultaneously. In addition, those skilled in the art, guided by the content of this application, may add one or more other operations to the flowcharts, or remove one or more operations from the flowcharts.

[0066] Furthermore, the described embodiments are merely some, not all, of the embodiments of this application. The components of the embodiments of this application described and illustrated herein can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0067] To enable those skilled in the art to utilize the content of this application, and in conjunction with the specific application scenario of "engineering rock mass jointing technology," the following embodiments are provided. For those skilled in the art, the general principles defined herein can be applied to other embodiments and application scenarios without departing from the spirit and scope of this application. Although this application primarily describes the field of "engineering rock mass jointing technology," it should be understood that this is merely an exemplary embodiment.

[0068] It should be noted that the term "comprising" will be used in the embodiments of this application to indicate the presence of the features declared thereafter, but does not exclude the addition of other features.

[0069] The following is a detailed description of a method for predicting the normal displacement of joint surfaces in soft rock, provided in the embodiments of this application.

[0070] Reference Figure 1 The diagram shown is a flowchart illustrating a method for predicting the normal displacement of a soft rock joint surface according to an embodiment of this application. The exemplary steps of this embodiment are described below:

[0071] S101. Obtain the shear displacement, shear closure coefficient, normal stress, and basic friction angle of the joint surface in soft rock.

[0072] In this application, soft rock refers to a complex petrological medium exhibiting significant plastic deformation under specific environmental conditions. A joint refers to a fissure in rock, a fracture where the rock on either side does not show significant displacement; simply put, it is a crack or fissure formed in rock under natural conditions. Soft rock undergoes a process from an elastic stage to a plastic stage after being subjected to shear force. The shear displacement of a soft rock joint surface can be measured using measuring instruments. It is readily understood that this shear displacement refers to the displacement of the soft rock joint surface from the time it begins to be subjected to shear force until the present time. Normal stress refers to the force perpendicular to the direction of the shear force. Shear closure coefficient, normal stress, and basic friction angle are all commonly used terms in this field.

[0073] S102. Based on the normal stress and the basic friction angle, determine the residual dilatation angle of the joint surface and the maximum displacement of soft rock in the elastic stage.

[0074] In this embodiment, the determination of the residual dilatation angle of the joint surface and the maximum displacement of the soft rock in the elastic stage, based on normal stress and the basic friction angle, can be divided into two steps. One step determines the residual dilatation angle of the joint surface using normal stress and the basic friction angle; the other step determines the maximum displacement of the soft rock in the elastic stage using the same parameters. There is no specific order between these two determinations.

[0075] In one instance, the residual dilatation angle of the joint surface is determined using normal stress and the basic friction angle. The specific steps are as follows: based on the normal stress and the maximum effective dip angle of the joint element along the shear direction, the minimum apparent dip angle of the contact joint element under normal stress is determined; based on the normal stress, the basic friction angle, and the maximum effective dip angle of the joint surface element along the shear direction, the shear brittleness coefficient is determined; based on the minimum apparent dip angle and the shear brittleness coefficient, the residual dilatation angle is determined.

[0076] In another instance, the maximum displacement of soft rock in the elastic stage was determined using normal stress and the basic friction angle.

[0077] The maximum displacement of soft rock in the elastic stage can be calculated using the following formula.

[0078]

[0079]

[0080] in, This represents the maximum displacement of soft rock in its elastic stage. The basic friction angle, The average apparent tilt angle of the joint surface in actual contact with the joint micro-element. σ is the maximum effective dip angle of the joint element along the shear direction. n For normal stress, σ c denoted as uniaxial compressive strength, A0 is the ratio of the equivalent dip angle of all joint surface elements greater than 0 to the total area of ​​the joint surfaces, and C is the formula fitting coefficient.

[0081] S103. If the shear displacement is less than or equal to the maximum displacement of soft rock in the elastic stage, then the closing displacement of the first joint surface is determined according to the shear displacement and the shear closure coefficient; and the closing displacement of the first joint surface is determined as the predicted joint surface normal displacement.

[0082] In the embodiments of this application, if the shear displacement is less than or equal to the maximum displacement of soft rock in the elastic stage, it indicates that the joint micro-element has not yet worn, that is, the joint surface has not yet climbed, so there is no opening displacement caused by the climbing effect of the joint surface, only the closing displacement of the joint surface.

[0083] Specifically, the closure displacement of the first section plane is calculated using the following formula;

[0084]

[0085] Where, δ v1 Let 'a' be the displacement of the first plane closure, and 'a' be the shear closure coefficient. For shear displacement, i m0 This represents the maximum possible dilatation angle during the elastic stage of soft rock.

[0086] S104. If the shear displacement is greater than the maximum displacement of soft rock in the elastic stage, then the opening displacement caused by the climbing effect of the joint surface is determined based on the shear displacement, normal stress, residual dilatation angle and the maximum displacement of soft rock in the elastic stage.

[0087] In the embodiments of this application, if the shear displacement is greater than the maximum displacement of soft rock in the elastic stage, it indicates that the joint micro-element has been worn, that is, the joint surface has already experienced a climbing effect, and therefore there is already an opening displacement caused by the climbing effect of the joint surface.

[0088] The opening displacement caused by the joint climbing effect can be calculated using the following formula.

[0089]

[0090] Where, δ v2 This refers to the opening displacement caused by the joint's climbing action. Let i be the shear displacement, k be the wear rate constant, and i be the wear rate constant. m0 i represents the maximum possible dilatation angle in the elastic stage of soft rock. mr For the residual shear dilatation angle, σ n For normal stress, σ c For uniaxial compressive strength, δ r The displacement at the preset residual stress. This represents the maximum displacement of soft rock in the elastic stage.

[0091] S105. Determine the closing displacement of the second joint surface based on the opening displacement and the shear closure coefficient.

[0092] In the embodiments of this application, if the shear displacement is greater than the maximum displacement of soft rock in the elastic stage, in addition to the opening displacement caused by the joint climbing effect, there is also a second joint surface closing displacement.

[0093] The closing displacement of the second section surface is calculated using the following formula.

[0094] δ v3 =aδ v2 .

[0095] Where, δ v3 The displacement of the second joint plane closure is given by δ, where α is the shear closure coefficient and δ is the displacement of the second joint plane closure. v2 This refers to the opening displacement caused by the joint climbing action.

[0096] S106. Calculate the sum of the opening displacement caused by the joint climbing action and the closing displacement of the second joint surface to obtain the predicted normal displacement of the joint surface.

[0097] In the embodiments of this application, if the shear displacement is greater than the maximum displacement of soft rock in the elastic stage, there are two types of displacement: the opening displacement caused by the joint climbing action and the closing displacement of the second joint surface. This application uses the sum of the opening displacement caused by the joint climbing action and the closing displacement of the joint surface as the predicted joint surface normal displacement, thus possessing the ability to predict the change of the joint surface normal displacement with shear displacement.

[0098] This application provides a method, apparatus, electronic device, and medium for predicting the normal displacement of soft rock joint surfaces. The method includes: acquiring the shear displacement, shear closure coefficient, normal stress, and basic friction angle of the soft rock joint surface; determining the residual dilatation angle and the maximum displacement of the soft rock in the elastic stage based on the normal stress and the basic friction angle; if the shear displacement is less than or equal to the maximum displacement of the soft rock in the elastic stage, determining the first joint surface closure displacement based on the shear displacement and the shear closure coefficient; and determining the first joint surface closure displacement as the predicted joint surface normal displacement; if the shear displacement is greater than the maximum displacement of the soft rock in the elastic stage, determining the opening displacement caused by the joint surface climbing action based on the shear displacement, normal stress, residual dilatation angle, and the maximum displacement of the soft rock in the elastic stage; determining the second joint surface closure displacement based on the opening displacement and the shear closure coefficient; and calculating the sum of the opening displacement caused by the joint surface climbing action and the second joint surface closure displacement to obtain the predicted joint surface normal displacement. When the shear displacement is less than or equal to the maximum displacement of soft rock in the elastic stage, this application determines the first joint surface closure displacement as the predicted joint surface normal displacement; when the shear displacement is greater than the maximum displacement of soft rock in the elastic stage, the sum of the opening displacement caused by the joint surface climbing action and the second joint surface closure displacement is determined as the predicted joint surface normal displacement; it can predict the joint surface normal displacement based on the magnitude of the shear displacement.

[0099] Reference Figure 2 The diagram shown is a flowchart illustrating another method for predicting the normal displacement of a soft rock joint surface provided in this application embodiment. This method determines the residual dilatation angle of the joint surface based on the normal stress and the basic friction angle. The exemplary steps of this application embodiment are described below:

[0100] S201. Based on the normal stress and the maximum effective tilt angle of the joint element along the shear direction, determine the minimum apparent tilt angle of the contact joint element under the normal stress.

[0101] The minimum apparent tilt angle can be calculated using the following formula.

[0102]

[0103] in, For the minimum viewing tilt angle, σ n For normal stress, σ c Let A0 be the uniaxial compressive strength, A0 be the ratio of the equivalent dip angle of all joint surface elements greater than 0 to the total area of ​​the joint surfaces, and C be the formula fitting coefficient. This represents the maximum effective tilt angle of the joint element along the shear direction.

[0104] S202. Determine the shear brittleness coefficient based on the maximum value of the normal stress, the basic friction angle, and the effective inclination angle of the joint surface micro-element along the shear direction.

[0105] Specifically, the shear brittleness coefficient is calculated using the following formula.

[0106]

[0107]

[0108] Where b is the shear brittleness coefficient, σ n For normal stress, The basic friction angle, σ is the average apparent dip angle of the joint surface in actual contact with the joint micro-protrusion. c Uniaxial compressive strength, A0 represents the maximum effective dip angle of the joint element along the shear direction, A0 is the ratio of the effective dip angle of all joint surface elements when it is greater than 0 to the total area of ​​the joint surface, and C is the formula fitting coefficient.

[0109] S203. Determine the residual dilatation angle based on the minimum apparent tilt angle and the shear brittleness coefficient.

[0110] The residual dilatation angle is calculated using the following formula.

[0111]

[0112] Among them, i mr For residual shear dilatation angle, denoted as minimum apparent tilt angle, and b as shear brittleness coefficient.

[0113] This application provides a method for predicting the normal displacement of a soft rock joint surface. The method includes: determining the minimum apparent dip angle of the contact joint element under the normal stress based on the normal stress and the maximum effective dip angle of the joint element along the shear direction; determining the shear brittleness coefficient based on the normal stress, the basic friction angle, and the maximum effective dip angle of the joint element along the shear direction; and determining the residual dilatation angle based on the minimum apparent dip angle and the shear brittleness coefficient. This application determines the minimum apparent dip angle and the shear brittleness coefficient by using the normal stress and the maximum effective dip angle of the joint element along the shear direction, and finally determines the residual dilatation angle based on the minimum apparent dip angle and the shear brittleness coefficient.

[0114] Reference Figure 3 As shown in the figure, a device for predicting the normal displacement of a soft rock joint surface is provided in an embodiment of this application. The device includes:

[0115] The acquisition module 301 is used to acquire the shear displacement, shear closure coefficient, normal stress and basic friction angle of the joint surface of soft rock.

[0116] The determination module 302 is used to determine the residual dilatation angle of the joint surface and the maximum displacement of soft rock in the elastic stage based on the normal stress and the basic friction angle.

[0117] The determination module 302 is also used to determine the first joint surface closure displacement based on the shear displacement and the shear closure coefficient if the shear displacement is less than or equal to the maximum displacement of the soft rock in the elastic stage; and to determine the first joint surface closure displacement as the predicted joint surface normal displacement.

[0118] The determination module 302 is also used to determine the opening displacement caused by the joint surface climbing action if the shear displacement is greater than the maximum displacement of soft rock in the elastic stage, based on the shear displacement, normal stress, residual dilatation angle and the maximum displacement of soft rock in the elastic stage.

[0119] The determination module 302 is also used to determine the second joint surface closure displacement based on the opening displacement and the shear closure coefficient;

[0120] The calculation module 303 is used to calculate the sum of the opening displacement caused by the joint climbing action and the closing displacement of the second joint surface, so as to obtain the predicted joint surface normal displacement.

[0121] In one possible implementation, the determining module 302 is specifically used to determine the minimum apparent tilt angle of the contact joint element under normal stress based on the normal stress and the maximum value of the effective tilt angle of the joint element along the shear direction; to determine the shear brittleness coefficient based on the normal stress, the basic friction angle, and the maximum value of the effective tilt angle of the joint surface element along the shear direction; and to determine the residual dilatation angle based on the minimum apparent tilt angle and the shear brittleness coefficient.

[0122] In one possible implementation, the determining module 302 is specifically used to calculate the minimum apparent tilt angle using the following formula; The shear brittleness coefficient is calculated using the following formula; in, For the minimum viewing tilt angle, σ n For normal stress, σ c Let A0 be the uniaxial compressive strength, A0 be the ratio of the equivalent dip angle of all joint surface elements greater than 0 to the total area of ​​the joint surfaces, and C be the formula fitting coefficient. Let be the maximum effective dip angle of the joint element along the shear direction, and b be the shear brittleness coefficient. The basic friction angle, The average apparent tilt angle of the joint surface in actual contact with the joint micro-protrusion.

[0123] In one possible implementation, the determining module 302 is specifically used to calculate the residual dilatation angle using the following formula; Among them, i mr For residual shear dilatation angle, denoted as minimum apparent tilt angle, and b as shear brittleness coefficient.

[0124] In one possible implementation, the determining module 302 is specifically used to calculate the maximum displacement of soft rock in the elastic stage using the following formula; in, This represents the maximum displacement of soft rock in the elastic stage.

[0125] In one possible implementation, the determining module 302 is specifically used to calculate the first joint plane closure displacement using the following formula; Where, δ v1 Let 'a' be the displacement of the first plane closure, and 'a' be the shear closure coefficient. For shear displacement, i m0 This represents the maximum possible dilatation angle during the elastic stage of soft rock.

[0126] In one possible implementation, the determining module 302 is specifically used to calculate the opening displacement caused by the joint climbing effect using the following formula;

[0127]

[0128] Where, δ v2 This refers to the opening displacement caused by the joint's climbing action. Let i be the shear displacement, k be the wear rate constant, and i be the wear rate constant. m0 i represents the maximum possible dilatation angle in the elastic stage of soft rock. mr For the residual shear dilatation angle, σ n For normal stress, σ c For uniaxial compressive strength, δ r The displacement at the preset residual stress. The maximum displacement of soft rock in the elastic stage is given by the following formula; the closing displacement of the second joint surface is calculated using the formula: δ v3 =aδ v2 ; where δ v3 denoted as the joint surface closure displacement, and 'a' as the shear closure coefficient.

[0129] This application provides a device for predicting the normal displacement of a soft rock joint surface. The device includes: an acquisition module 301 for acquiring the shear displacement, shear closure coefficient, normal stress, and basic friction angle of the soft rock joint surface; a determination module 302 for determining the residual dilatation angle and the maximum displacement of the soft rock in its elastic stage based on the normal stress and basic friction angle; the determination module 302 is further configured to determine the first joint surface closure displacement based on the shear displacement and shear closure coefficient if the shear displacement is less than or equal to the maximum displacement of the soft rock in its elastic stage; and to set the first... The joint surface closure displacement is determined as the predicted joint surface normal displacement. The determination module 302 is also used to determine the opening displacement caused by the joint surface ramping action based on the shear displacement, normal stress, residual dilatation angle, and the maximum displacement of the soft rock in the elastic stage if the shear displacement is greater than the maximum displacement of the soft rock in the elastic stage. The determination module 302 is also used to determine the second joint surface closure displacement based on the opening displacement and the shear closure coefficient. The calculation module 303 is used to calculate the sum of the opening displacement caused by the joint ramping action and the second joint surface closure displacement to obtain the predicted joint surface normal displacement. In this application, when the shear displacement is less than or equal to the maximum displacement of the soft rock in the elastic stage, the first joint surface closure displacement is determined as the predicted joint surface normal displacement; when the shear displacement is greater than the maximum displacement of the soft rock in the elastic stage, the sum of the opening displacement caused by the joint surface ramping action and the second joint surface closure displacement is determined as the predicted joint surface normal displacement; it can predict the joint surface normal displacement based on the magnitude of the shear displacement.

[0130] like Figure 4 As shown in the embodiment of this application, an electronic device 400 includes a processor 401, a memory 402, and a bus. The memory 402 stores machine-readable instructions that can be executed by the processor 401. When the electronic device is running, the processor 401 communicates with the memory 402 through the bus. The processor 401 executes the machine-readable instructions to perform the steps of the prediction method for the normal displacement of soft rock joint surfaces as described above.

[0131] Specifically, the memory 402 and processor 401 mentioned above can be general-purpose memory and processor, without any specific limitations. When the processor 401 runs the computer program stored in the memory 402, it can execute the above-mentioned method for predicting the normal displacement of soft rock joint surfaces.

[0132] Corresponding to the above-described method for predicting the normal displacement of soft rock joint surfaces, this application embodiment also provides a computer-readable storage medium storing a computer program, which, when run by a processor, executes the steps of the above-described method for predicting the normal displacement of soft rock joint surfaces.

[0133] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems and devices described above can be referred to the corresponding processes in the method embodiments, and will not be repeated here. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed mutual coupling or direct coupling or communication connection can be through some communication interfaces; the indirect coupling or communication connection of devices or modules can be electrical, mechanical, or other forms.

[0134] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0135] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0136] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the information processing methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0137] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for predicting the normal displacement of joint surfaces in soft rock, characterized in that, The method includes: Obtain the shear displacement, shear closure factor, normal stress, and basic friction angle of the joint surface in soft rock. Based on the normal stress and the basic friction angle, determine the residual dilatation angle of the joint surface and the maximum displacement of the soft rock in the elastic stage; If the shear displacement is less than or equal to the maximum displacement of the soft rock in the elastic stage, then the first joint surface closure displacement is determined based on the shear displacement and the shear closure coefficient; and the first joint surface closure displacement is determined as the predicted joint surface normal displacement. If the shear displacement is greater than the maximum displacement of the soft rock in the elastic stage, then the opening displacement caused by the joint surface climbing action is determined based on the shear displacement, the normal stress, the residual dilatation angle, and the maximum displacement of the soft rock in the elastic stage. The second joint surface closure displacement is determined based on the opening displacement and the shear closure coefficient. The sum of the opening displacement caused by the climbing action of the joint surface and the closing displacement of the second joint surface is calculated to obtain the predicted normal displacement of the joint surface; The step of determining the first joint surface closure displacement based on the shear displacement and the shear closure coefficient includes: calculating the first joint surface closure displacement using the following formula; ;in, For the first section of the closure displacement of the lithography plane, The shear closure factor is... This is the shear displacement. This represents the maximum possible dilatation angle in the elastic stage of soft rock. The closing displacement of the second joint plane is calculated using the following formula; ;in, This refers to the closed displacement of the second plane. The shear closure factor is... This refers to the opening displacement caused by the joint climbing action.

2. The method for predicting the normal displacement of soft rock joint surfaces according to claim 1, characterized in that, The residual dilatation angle of the joint surface is determined based on the normal stress and the basic friction angle, including: Based on the normal stress and the maximum effective tilt angle of the joint element along the shear direction, determine the minimum apparent tilt angle of the contact joint element under the normal stress. The shear brittleness coefficient is determined based on the maximum value of the normal stress, the basic friction angle, and the effective inclination angle of the joint surface micro-element along the shear direction; The residual dilatation angle is determined based on the minimum apparent tilt angle and the shear brittleness coefficient.

3. The method for predicting the normal displacement of soft rock joint surfaces according to claim 2, characterized in that, Determining the minimum apparent tilt angle and the shear brittleness coefficient includes: The minimum apparent tilt angle is calculated using the following formula; ； The shear brittleness coefficient is calculated using the following formula; ， ； in, For the minimum viewing angle, For normal stress, Uniaxial compressive strength, This is the ratio of the equivalent dip angle of all joint surface elements greater than 0 to the total area of ​​the joint surfaces. The coefficients are the fitting coefficients for the formula. This represents the maximum effective dip angle of the joint element along the shear direction. The shear brittleness coefficient, The basic friction angle, The average apparent tilt angle of the joint surface in actual contact with the joint micro-protrusion.

4. The method for predicting the normal displacement of soft rock joint surfaces according to claim 3, characterized in that, Determining the residual dilatation angle based on the minimum apparent tilt angle and the shear brittleness coefficient includes: The residual dilatation angle is calculated using the following formula; ； in, For residual shear dilatation angle, For the minimum viewing angle, This is the shear brittleness coefficient.

5. The method for predicting the normal displacement of soft rock joint surfaces according to claim 3, characterized in that, Based on the normal stress and the basic friction angle, the maximum displacement of soft rock in the elastic stage is determined, including: The maximum displacement of the soft rock in the elastic stage is calculated using the following formula; ； in, This represents the maximum displacement of soft rock in the elastic stage.

6. The method for predicting the normal displacement of soft rock joint surfaces according to claim 4 or 5, characterized in that, Determine the opening displacement caused by joint climbing action, including: The opening displacement caused by the joint climbing effect is calculated using the following formula; ； in, This refers to the opening displacement caused by the joint's climbing action. This is the shear displacement. The wear rate constant is This represents the maximum possible dilatation angle in the elastic stage of soft rock. For residual shear dilatation angle, For normal stress, Uniaxial compressive strength, The displacement at the preset residual stress. This represents the maximum displacement of soft rock in the elastic stage.

7. A device for predicting the normal displacement of joint surfaces in soft rock, characterized in that, The device includes: The acquisition module is used to acquire the shear displacement, shear closure coefficient, normal stress, and basic friction angle of the joint surface in soft rock. The determination module is used to determine the residual dilatation angle of the joint surface and the maximum displacement of the soft rock in the elastic stage based on the normal stress and the basic friction angle. The determining module is further configured to, if the shear displacement is less than or equal to the maximum displacement of the soft rock in the elastic stage, determine the first joint surface closure displacement based on the shear displacement and the shear closure coefficient; and determine the first joint surface closure displacement as the predicted joint surface normal displacement; The determining module is further configured to, if the shear displacement is greater than the maximum displacement of the soft rock in the elastic stage, determine the opening displacement caused by the joint surface climbing action based on the shear displacement, the normal stress, the residual dilatation angle and the maximum displacement of the soft rock in the elastic stage; The determining module is further configured to determine the second joint surface closing displacement based on the opening displacement and the shear closing coefficient; The calculation module is used to calculate the sum of the opening displacement caused by the climbing action of the joint surface and the closing displacement of the second joint surface, so as to obtain the predicted normal displacement of the joint surface; Specifically, the determining module is used to calculate the closed displacement of the first joint surface using the following formula; ;in, For the first section of the closure displacement of the lithography plane, The shear closure factor is... This is the shear displacement. This represents the maximum possible dilatation angle in the elastic stage of soft rock. The module is specifically used to calculate the closed displacement of the second joint surface using the following formula; ;in, This refers to the closed displacement of the second plane. The shear closure factor is... This refers to the opening displacement caused by the joint climbing action.

8. An electronic device, characterized in that, include: The device includes a processor, a storage medium, and a bus, wherein the storage medium stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor communicates with the storage medium via the bus, and the processor executes the machine-readable instructions to perform the steps of the method for predicting the normal displacement of soft rock joint surfaces as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, performs the steps of the method for predicting the normal displacement of soft rock joint surfaces as described in any one of claims 1 to 6.

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