Calculation method for connectivity rate of structural surface of broken structure rock mass

Abstract

The invention relates to the technical field of engineering geological survey, in particular to a method for calculating the connectivity rate of structural surfaces of a rock mass of a fragmented structure. The method comprises the following steps: acquiring an orthoimage of an in-situ shear test failure surface of a rock mass test block; obtaining the shear failure area of the structural surface on the failure surface; acquiring the area of the damaged surface of the single test block; according to the shear failure area of the structural surface on the failure surface and the area of the failure surface of the single test block, calculating the connectivity rate of the structural surface of the single test block; and according to the structural surface connectivity rate of the single test block, calculating the structural surface connectivity rate of the test area. According to the method, the application range of the shear test can be expanded to calculation of the connectivity rate of the rock mass structural surface, and parameter types provided by the shear test are greatly enriched.

Description

Technical Field

[0001] The invention relates to the technical field of engineering geological survey, and in particular to a method for calculating the connectivity rate of structural surfaces of a fragmented structural rock mass. Background Art

[0002] The Code for Geological Investigation of Hydropower Engineering (GB50287-2016) divides fragmented structural rock mass into two subcategories based on the spacing of structural planes: one is block structure, which is characterized by a spacing of structural planes between 10 and 30 cm; the other is fragmented structure, whose spacing is less than 10 cm. The formation of fragmented structural rock mass is mainly attributed to the combined effects of early geological movements and tectonic stresses, and the subsequent influence of external factors such as weathering and unloading, resulting in the interlaced cutting of structural planes of various sizes in the rock mass, and the rock mass presents a highly fragmented state. The structural planes in this type of fragmented rock mass have small development spacing, short extension length, diverse shapes, and are mostly filled with mud and rock debris.

[0003] As a key indicator for comprehensively measuring the size of the internal structural planes of a rock mass and their degree of interconnection, connectivity plays a pivotal role in assessing the overall strength and stability of the rock mass. However, given that the development characteristics of structural planes are often hidden deep beneath the surface, and the current technology and methods for measuring structural planes are still limited, research on connectivity is still scarce. Therefore, how to accurately evaluate connectivity is undoubtedly a topic that needs to be explored in depth.

[0004] In the prior art, the calculation method of structural surface connectivity relies on the detailed cataloging of structural surfaces in the adit, and then the bandwidth projection method, window method or network simulation-based calculation method are used indoors to obtain the result. In the practice of adit geological cataloging, the scale range commonly used is 1:50 to 1:100, and structural surfaces with a length of less than 0.5 meters are often ignored. However, in the fragmented rock structure, these short and dense structural surfaces are precisely the main elements that constitute the rock structure. If the traditional bandwidth or window method is used to calculate the connectivity, not only may significant errors occur, but the applicability is also greatly reduced.

[0005] In addition, the traditional calculation method of structural surface connectivity is closely related to the projection bandwidth and window size. The connectivity will gradually increase with the increase of projection bandwidth or window until the connectivity is 100%. This problem has been demonstrated in the prior art, and it is recommended to use 2 to 2.5 times the structural surface spacing as a reference for the shear band width value when analyzing the connectivity.

[0006] In order to accurately evaluate the connectivity of fragmented rock mass structures, all structural surfaces should be cataloged in theory, but this will greatly increase the workload of cataloging and is extremely difficult to operate in practice. Therefore, the accurate estimation of the connectivity of structural surfaces in fragmented rock mass structures is still a difficult problem that needs to be solved urgently. Summary of the invention

[0007] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a method for calculating the connectivity rate of the structural surfaces of a fractured structural rock mass, which solves the problem that the actual operation is extremely difficult and the connectivity rate of the structural surfaces of a fractured structural rock mass cannot be accurately estimated.

[0008] To achieve the above-mentioned and other related purposes, the present invention provides a method for calculating the connectivity of structural surfaces of a fractured rock mass, comprising:

[0009] S1. Obtain the orthophoto of the failure surface of the in-situ shear test of the rock mass specimen;

[0010] S2, obtaining the shear failure area of ​​the structural surface on the failure surface;

[0011] S3, obtaining the area of ​​the failure surface of a single test block;

[0012] S4, calculating the structural surface connectivity rate of a single test block according to the shear failure area of ​​the structural surface on the failure surface and the area of ​​the failure surface of a single test block;

[0013] S5. Calculate the structural surface connectivity rate of the test area according to the structural surface connectivity rate of the single test block.

[0014] In one embodiment of the present invention, the number of the rock test blocks in step S1 is greater than or equal to 5, and the bottom shear surface area of ​​the rock test blocks is greater than or equal to 2500 cm 2 , the minimum side length is greater than or equal to 50cm, the rock mass test blocks are named (τ 1 , τ 2 ···τ k , k≥5).

[0015] In one embodiment of the present invention, obtaining an orthophoto of the failure surface of the in-situ shear test of the rock mass test block in step S1 includes:

[0016] S11, the rock mass test blocks are placed horizontally, and four control points are arranged on the shear failure surface of each rock mass test block, namely, T 1 (0, 0), T 2 (30, 0), T 3 (30, 30), T 4 (0, 30);

[0017] S12, taking an orthophoto of the shear failure surface of the rock mass test block, photographing the shear failure surface with a camera or a mobile phone;

[0018] S13, using ArcMap software to open the orthophoto of the shear damage surface, 1 , T 2 , T 3 , T 4 To calibrate the base point, the orthophoto of the shear damage surface was calibrated in ArcMap software and the photo was output in JPEG format.

[0019] In one embodiment of the present invention, obtaining the shear failure area of ​​the structural surface on the failure surface in step S2 includes:

[0020] Enlarging the orthophoto of the shear failure surface in Surfer software or Autocad software;

[0021] Use polylines to draw the area S of each structural surface on the enlarged orthophoto of the shear failure surface. ji , then the total structural surface area of ​​each rock mass specimen is

[0022] In one embodiment of the present invention, obtaining the area of ​​the failure surface of a single test block in step S3 includes:

[0023] In Surfer software or Autocad software, draw along the boundary of the test block and measure the area of ​​the failure surface of a single test block.

[0024] In one embodiment of the present invention, the calculation of the structural surface connectivity rate of a single test block according to the shear failure area of ​​the structural surface on the failure surface and the area of ​​the failure surface of a single test block in step S4 includes:

[0025] The calculation formula of the structural surface connectivity of a single test block is:

[0026] in, is τ k The total area of ​​the test block structure, is τ k The area of ​​the test block failure surface, is τ k The connectivity rate of the test block structure surface.

[0027] In one embodiment of the present invention, calculating the structural surface connectivity rate of the test area according to the structural surface connectivity rate of a single test block in step S5 includes:

[0028] Repeat steps S1 to S4 to calculate the structural surface connectivity of other test blocks. The calculation formula of the structural surface connectivity rate K in the test area is:

[0029] The present invention also provides an electronic device, comprising a processor and a memory, wherein the memory stores program instructions, and is characterized in that: the processor runs the program instructions to implement the above-mentioned method for calculating the connectivity rate of the structural surface of the fractured structure rock mass.

[0030] As described above, the method for calculating the connectivity of structural surfaces of a fractured rock mass according to the present invention has the following beneficial effects:

[0031] (1) The method for calculating the connectivity of structural surfaces of a fractured rock mass of the present invention can expand the application scope of the shear test to the calculation of the connectivity of structural surfaces of the rock mass, thus greatly enriching the types of parameters that can be provided by the shear test.

[0032] (2) The method for calculating the connectivity of structural surfaces of fractured rock mass of the present invention expands the connectivity estimation method and provides a new perspective and approach for the estimation of connectivity.

[0033] (3) The method for calculating the connectivity of structural surfaces of a fractured structural rock mass of the present invention can comprehensively and accurately catalog all structural surfaces on the shear failure surface by introducing high-definition imaging technology, thereby overcoming the difficulties of structural surface concealment and measurement technology limitations. At the same time, the present invention also realizes the accurate calculation of the connectivity of two-dimensional structural surfaces, and the result can truly and objectively reflect the actual connectivity of the rock mass.

[0034] (4) The method for calculating the connectivity of the structural surface of the fractured structure rock mass of the present invention fully considers the specific failure path of the rock mass when calculating the connectivity as the connectivity on the shear failure surface. By defining the connectivity as the proportion of the structural surface on the failure path and reducing it to the calculation of the effective area of ​​the structural surface and the rock bridge area, the present invention further reveals the essence of the connectivity calculation from a mechanical perspective.

[0035] (5) The method for calculating the connectivity of the structural surface of a fractured rock mass of the present invention not only expands the application scope of the shear test and improves the accuracy of calculating the connectivity of the structural surface of the fractured rock mass, but also realizes the calculation of the connectivity of the structural surface in a true sense. This makes the present invention patent have broad application prospects and important practical value in the field of geotechnical engineering parameter acquisition. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A flow chart of a method for calculating the connectivity of structural surfaces of a fractured rock mass provided in an embodiment of the present application.

[0037] Figure 2The invention provides a shear failure surface control point arrangement for a method for calculating the connectivity rate of structural surfaces of a fractured rock mass provided in an embodiment of the present application.

[0038] Figure 3 A method for calculating the connectivity rate of structural surfaces of a fractured rock mass provided in an embodiment of the present application is based on drawing the shear failure surface area using Surfer or Autocad software.

[0039] Figure 4 The present application provides a method for calculating the connectivity of structural surfaces of a fragmented rock mass, which is a failure surface of the τ1 first block sample in a strong overturning deformation zone.

[0040] Figure 5 A method for calculating the connectivity of structural surfaces of a fragmented structural rock mass provided in an embodiment of the present application is provided, which is a τ1 second block-like failure surface in a strong overturning deformation zone.

[0041] Figure 6 A method for calculating the connectivity of structural surfaces of a fragmented structural rock mass provided in an embodiment of the present application is provided, which is the τ1 third block sample failure surface in the SPD1 strong dumping deformation zone.

[0042] Figure 7 The present application provides a method for calculating the connectivity of structural surfaces of a fragmented rock mass, which is a failure surface of the τ1 fourth block sample in a strong overturning deformation zone.

[0043] Figure 8 A method for calculating the connectivity of structural surfaces of a fragmented structural rock mass provided in an embodiment of the present application is provided for the τ1 5th sample failure surface in the strong toppling deformation zone of a horizontal tunnel. DETAILED DESCRIPTION

[0044] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0045] It should be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present invention in a schematic manner, and thus the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0046] Terms such as first or second can be used to describe various components, but these components are not limited by the above terms. The above terms are used to distinguish one component from another component, for example, without departing from the scope of the concept according to the present disclosure, a first component can be referred to as a second component, and similarly, a second component can be referred to as a first component.

[0047] In addition, "connected / coupled" means that one component is directly electrically coupled to another component or is indirectly electrically coupled through another component. The singular form may include the plural form unless explicitly stated in the sentence. In addition, "include / comprise" or "includes / comprises" used in this specification indicates that one or more components, steps, operations, and elements exist or have been added. The specific structural or functional descriptions of the examples of the implementation of the concepts disclosed in this specification are only illustrated to describe the examples of the implementation of the concepts, and the examples of the implementation of the concepts can be implemented in various forms, but these descriptions are not limited to the examples of the implementation described in this specification.

[0048] According to the concept, various modifications and changes can be applied to the examples of the embodiments, so that the examples of the embodiments will be illustrated in the drawings and described in the specification. However, the examples of the embodiments according to the concept are not limited to the specific embodiments, but include all changes, equivalents or replacements included in the spirit and technical scope of the present disclosure.

[0049] It should be understood that when an element is described as being "coupled" or "connected" to another element, the element may be directly coupled or directly connected to the other element, or may be coupled or connected to the other element through a third element. Conversely, it should be understood that when an element is referred to as being "directly coupled to" or "directly coupled to" another element, no other element is placed between them. Other expressions describing the relationship between components (i.e., "between" and "directly between" or "adjacent to" and "directly adjacent to") need to be interpreted in the same manner.

[0050] The terms used in this specification are only used to describe specific examples of the embodiments and are not intended to limit the present disclosure. If there is no clear opposite meaning in the context, the singular form may include the plural form. In this specification, it should be understood that the term "including" or "having" indicates the presence of the features, quantities, steps, operations, components, parts or combinations thereof described in the specification, but the possibility of the presence or addition of one or more other features, quantities, steps, operations, components, parts or combinations thereof cannot be precluded.

[0051] If there is no contrary definition, all terms (including technical terms or scientific terms) used herein have the same meaning as those generally understood by ordinary technicians in the field. If the terms defined in the commonly used dictionary are not clearly defined in this specification, they should be interpreted as having the same meaning as in the context of the relevant technology, and not interpreted as ideal or overly formal meanings.

[0052] Descriptions of well-known components and processing techniques may be omitted so as not to unnecessarily obscure the embodiments of the disclosure.

[0053] Throughout the specification, the same reference numerals refer to the same elements. Thus, even if a reference numeral is not mentioned or described with reference to one figure, it may be mentioned or described with reference to another figure. Furthermore, even if a reference numeral is not shown in one figure, it may be mentioned or described with reference to another figure.

[0054] In addition, the logic level of the signal may be different or opposite to the described logic level. For example, a signal described as having a logic "high" level may alternatively have a logic "low" level, and a signal described as having a logic "low" level may alternatively have a logic "high" level.

[0055] The following will describe the various embodiments of the present disclosure in detail with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the various embodiments of the present disclosure, many technical details are provided in order to enable the reader to better understand the present disclosure. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present disclosure can be implemented.

[0056] It is worth noting that the connectivity referred to by the traditional connectivity calculation method is actually the "trace" connectivity of the structural surface exposed on the side wall of the adit, rather than its true "surface" connectivity.

[0057] For the fractured structural rock mass in the main parts of the project, a certain number of on-site in-situ shear tests are generally arranged. By taking high-definition images of the shear test failure surface and calibrating them indoors, the area of ​​the sheared structural surface on the shear failure surface is counted, and the ratio of the structural surface failure area to the shear failure surface area is calculated accordingly, thereby obtaining the structural surface connectivity rate on the two-dimensional space plane.

[0058] The present invention provides a more accurate and practical method to solve the problem of evaluating the connectivity of fragmented structural rock mass. Traditional calculation methods are limited by the concealment of structural surface development characteristics and the limitations of measurement technology, and are often difficult to accurately reflect the true connectivity of fragmented structural rock mass.

[0059] See also Figure 1 , Figure 1 A flow chart of a method for calculating the connectivity rate of structural surfaces of a shattered structural rock mass provided in an embodiment of the present application. The present invention provides a method for calculating the connectivity rate of structural surfaces of a shattered structural rock mass, comprising:

[0060] Step S1, obtaining an orthophoto of the failure surface of the in-situ shear test of the rock mass specimen.

[0061] Step S2: Obtain the shear failure area of ​​the structural surface on the failure surface.

[0062] Step S3, obtaining the area of ​​the failure surface of a single test block.

[0063] Step S4, calculating the structural surface connectivity rate of a single test block according to the shear failure area of ​​the structural surface on the failure surface and the area of ​​the failure surface of a single test block.

[0064] Step S5, calculating the structural surface connectivity rate of the test area according to the structural surface connectivity rate of the single test block.

[0065] The present invention provides a method for calculating the connectivity of structural surfaces of a fragmented structural rock mass, which aims to directly measure and calculate the actual damage area of ​​the structural surface on the shear failure surface by combining an on-site in-situ shear test with high-definition image analysis technology, and then obtain the connectivity of the structural surface on a two-dimensional space plane. The present invention not only overcomes the errors and lack of applicability of traditional methods in calculating the connectivity of fragmented structural rock mass, expands the types of parameters that can be obtained in shear tests, but also provides a more reliable and scientific basis for engineering practice, which helps to improve the assessment accuracy and safety of the stability of fragmented structural rock mass in the fields of water conservancy and hydropower engineering, mining, etc.

[0066] Specifically, the number of the rock test blocks in step S1 is greater than or equal to 5, and the bottom shear surface area of ​​the rock test blocks is greater than or equal to 2500 cm 2 , the minimum side length is greater than or equal to 50cm, the rock mass test blocks are named (τ 1 , τ 2 ···τ k , k≥5).

[0067] Specifically, obtaining the orthophoto of the failure surface of the in-situ shear test of the rock mass test block in step S1 includes:

[0068] Step S11: Place the rock mass test blocks horizontally, and arrange four control points on the shear failure surface of each rock mass test block, namely, T 1 (0, 0), T 2 (30, 0), T 3 (30, 30), T 4 (0, 30).

[0069] Step S12: taking an orthophoto of the shear failure surface of the rock mass test block, using a camera or a mobile phone to photograph the shear failure surface.

[0070] Step S13, using ArcMap software to open the orthophoto of the shear damage surface, 1 , T 2 , T 3 , T 4 To calibrate the base point, the orthophoto of the shear damage surface was calibrated in ArcMap software and the photo was output in JPEG format.

[0071] See also Figure 2 , Figure 2 The shear failure surface control point arrangement of a method for calculating the connectivity rate of a fractured rock mass structure provided in an embodiment of the present application. In one embodiment of the present invention, the upper plate shear test block, i.e., the rock mass test block, is placed horizontally, and four control points are arranged on the shear failure surface of each test block, namely, T 1 (0, 0), T 2 (30, 0), T 3 (30, 30), T 4 (0, 30), e.g. Figure 2 shown.

[0072] Take a high-definition orthophoto of the shear failure surface of the rock mass test block. Use a high-definition digital camera or mobile phone to take photos of the shear failure, requiring sufficient light to be provided to the failure surface before taking the photo, and the center of the photo should be facing the center of the shear failure. At the same time, adjust the shooting angle to ensure that the photo is flat and straight.

[0073] Indoor calibration pictures, high-definition images taken with ArcMap software, 1 , T 2 , T 3 , T 4 To calibrate the base point, use the “geo-referencing” function in the software to calibrate the image, and finally output the photo in JPEG format.

[0074] Specifically, obtaining the shear failure area of ​​the structural surface on the failure surface in step S2 includes:

[0075] Enlarging the orthophoto of the shear failure surface in Surfer software or Autocad software;

[0076] Use polylines to draw the area S of each structural surface on the enlarged orthophoto of the shear failure surface. ji , then the total structural surface area of ​​each rock mass specimen is

[0077] See also Figure 3 , Figure 3 A method for calculating the connectivity of structural surfaces of a fragmented structural rock mass provided in an embodiment of the present application is based on outlining the shear failure surface area using Surfer or Autocad software. In one embodiment of the present invention, the structural surface of the fragmented rock mass is usually filled with rock debris and mud. The shear surface along the structural surface is yellow, brown or rusty, and is generally straight. The shear zone along the rock failure is mostly undulating and has the color of fresh original rock. According to the different shear failure characteristics of the structural surface and the rock mass, the high-definition orthophoto image is enlarged in Surfer or Autocad software, and the area (S) of each structural surface on the failure surface is outlined using polyline. ji ), the total structural surface area of ​​each test block can be calculated according to the formula Perform calculations.

[0078] Specifically, obtaining the area of ​​the failure surface of a single test block in step S3 includes: drawing along the boundary of the test block in Surfer software or Autocad software, and measuring the area of ​​the failure surface of the single test block.

[0079] Specifically, in step S4, according to the shear failure area of ​​the structural surface on the failure surface and the area of ​​the failure surface of a single test block, the structural surface connectivity rate of a single test block is calculated, which includes: the structural surface "surface" connectivity rate is defined as the ratio of the area of ​​the shear failure structural surface of the test block to the total area of ​​the shear failure surface. The calculation formula of the structural surface connectivity rate of a single test block is:

[0080] in, is τ k The total area of ​​the test block structure, is τ k The area of ​​the test block failure surface, is τ k The connectivity rate of the test block structure surface.

[0081] Specifically, the calculation of the structural surface connectivity of the test area in step S5 based on the structural surface connectivity of a single test block includes: Since the area of ​​a single test block is small, the connectivity of a single test block is relatively discrete and less representative. Therefore, the average connectivity of all test blocks in the test area is selected as the connectivity of the structural surface of the area. Repeat steps S1 to S4 to calculate the structural surface connectivity of other test blocks respectively. The calculation formula of the structural surface connectivity rate K in the test area is:

[0082] See also Figures 4 to 8 , Figure 4The present application provides a method for calculating the connectivity of structural surfaces of a fragmented rock mass, which is a failure surface of the τ1 first block sample in a strong overturning deformation zone. Figure 5 A method for calculating the connectivity of structural surfaces of a fragmented structural rock mass provided in an embodiment of the present application is provided, which is a τ1 second block-like failure surface in a strong overturning deformation zone. Figure 6 A method for calculating the connectivity of structural surfaces of a fragmented structural rock mass provided in an embodiment of the present application is provided, which is the τ1 third block sample failure surface in the SPD1 strong dumping deformation zone. Figure 7 The present application provides a method for calculating the connectivity of structural surfaces of a fragmented rock mass, which is a failure surface of the τ1 fourth block sample in a strong overturning deformation zone. Figure 8 The fifth sample failure surface of τ1 in the strong toppling deformation zone of the horizontal tunnel in a method for calculating the surface connectivity rate of a fragmented structure rock mass provided in an embodiment of the present application. In order to further illustrate the method for calculating the surface connectivity rate of a fragmented structure rock mass of the present invention, the present invention takes the calculation of the surface connectivity rate of a fragmented rock mass structure in the toppling deformation zone of a pumped storage project as an example to illustrate the feasibility of the calculation method. The in-situ shear test site is located at 28m to 32m in the SPD2 horizontal tunnel, which is mainly a strongly toppled deformed rock mass with a fragmented structure. The 5 failure surfaces of the shear test are as follows Figures 4 to 8 As shown in Table 1, according to the proportion of the structural surface area of ​​each failure surface, the connectivity rate of each test block is calculated to be 43.3% to 62.0%, and the average connectivity rate is 53%.

[0083] In order to verify the reliability of the calculation method of the connectivity rate of the structural surface of the fractured rock mass, the bandwidth projection method was used according to the catalog map, and the bandwidth was selected as 0.5m. The connectivity rates of the two side walls of the adit at this location were calculated as K 1 =47.8%, K 2 =50.6%, then the connectivity rate of the two side arms K = 49.2%.

[0084] The structural surface connectivity rate estimated by on-site in-situ tests is 53%, and the structural surface connectivity rate calculated by the 0.5m bandwidth projection method is 49.2%. The two calculation results are basically consistent, but the bandwidth projection method is slightly smaller, mainly because some structural surfaces smaller than 0.5m were not cataloged during the structural surface cataloging process.

[0085] Table 1: Structural surface connectivity of each failure surface in the horizontal tunnel τ1 shear test

[0086]

[0087] The present invention also proposes an electronic device, the electronic device includes a processor and a memory, the memory stores program instructions, and the processor runs the program instructions to implement the above-mentioned calculation method of the connectivity rate of the structural surface of the fractured structure rock mass. The processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components; the memory may include a random access memory (RAM), and may also include a non-volatile memory, such as at least one disk memory. The memory can also be an internal memory of the random access memory (RAM) type, and the processor and the memory can be integrated into one or more independent circuits or hardware, such as an application specific integrated circuit (ASIC). It should be noted that the computer program in the above-mentioned memory can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, an electronic device, or a network device, etc.) to perform all or part of the steps of the methods of various embodiments of the present invention.

[0088] The present invention also proposes a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the above-mentioned calculation method of the connectivity rate of the structural surface of the fractured structure rock mass. The computer-readable storage medium can be an electronic medium, a magnetic medium, an optical medium, an electromagnetic medium, an infrared medium or a semiconductor system or a propagation medium. The computer-readable storage medium can also include a semiconductor or solid-state memory, a magnetic tape, a removable computer disk, a random access memory (RAM), a read-only memory (ROM), a hard disk and an optical disk. The optical disk can include a compact disk-read only memory (CD-ROM), a compact disk-read / write (CD-RW) and a DVD.

[0089] In summary, the method for calculating the connectivity of structural surfaces of fractured rock mass of the present invention can expand the application scope of shear test to calculate the connectivity of structural surfaces of rock mass, greatly enriching the types of parameters that can be provided by shear test. The present invention expands the connectivity estimation method and provides a new perspective and approach for estimating the connectivity. By introducing high-definition imaging technology, the present invention can comprehensively and accurately catalog all structural surfaces on the shear failure surface, thereby overcoming the difficulties of structural surface concealment and measurement technology limitations. At the same time, the present invention also realizes the accurate calculation of the connectivity of two-dimensional structural surfaces, and the result can truly and objectively reflect the actual connectivity status of the rock mass.

[0090] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A method for calculating the connectivity of structural surfaces of a fractured rock mass, characterized in that: include: S1. Obtain the orthophoto of the failure surface of the in-situ shear test of the rock mass specimen; S2, obtaining the shear failure area of ​​the structural surface on the failure surface; S3, obtaining the area of ​​the failure surface of a single test block; S4, calculating the structural surface connectivity rate of a single test block according to the shear failure area of ​​the structural surface on the failure surface and the area of ​​the failure surface of a single test block; S5. Calculate the structural surface connectivity rate of the test area according to the structural surface connectivity rate of the single test block.

2. The method for calculating the connectivity of structural surfaces of a fractured rock mass according to claim 1, characterized in that: The number of the rock test blocks in step S1 is greater than or equal to 5, and the bottom shear surface area of ​​the rock test blocks is greater than or equal to 2500 cm 2 , the minimum side length is greater than or equal to 50cm, the rock mass test blocks are named (τ1, τ2···τ k , k≥5).

3. The method for calculating the connectivity of structural surfaces of a fractured rock mass according to claim 1, characterized in that: The step S1 of obtaining the orthophoto of the failure surface of the in-situ shear test of the rock mass test block includes: S11, placing the rock test blocks horizontally, and arranging four control points on the shear failure surface of each rock test block, namely T1 (0, 0), T2 (30, 0), T3 (30, 30), and T4 (0, 30); S12, taking an orthophoto of the shear failure surface of the rock mass test block, photographing the shear failure surface with a camera or a mobile phone; S13, using ArcMap software to open the orthophoto of the shear damage surface taken, using T1, T2, T3, and T4 as calibration base points, calibrating the orthophoto of the shear damage surface in ArcMap software, and outputting the photo in JPEG format.

4. The method for calculating the connectivity of structural surfaces of a fractured rock mass according to claim 3, characterized in that: The step S2 of obtaining the shear failure area of ​​the structural surface on the failure surface includes: Enlarging the orthophoto of the shear failure surface in Surfer software or Autocad software; Use polylines to draw the area S of each structural surface on the enlarged orthophoto of the shear failure surface. ji , then the total structural surface area of ​​each rock mass specimen is 5. The method for calculating the connectivity of structural surfaces of a fractured rock mass according to claim 4, characterized in that: The step S3 of obtaining the area of ​​the failure surface of a single test block includes: In Surfer software or Autocad software, draw along the boundary of the test block and measure the area of ​​the failure surface of a single test block.

6. The method for calculating the connectivity of structural surfaces of a fractured rock mass according to claim 5, characterized in that: Calculating the structural surface connectivity rate of a single test block according to the shear failure area of ​​the structural surface on the failure surface and the area of ​​the failure surface of a single test block in step S4 includes: The calculation formula of the structural surface connectivity of a single test block is: in, is τ k The total area of ​​the test block structure, is τ k The area of ​​the test block failure surface, is τ k The connectivity rate of the test block structure surface.

7. The method for calculating the connectivity of structural surfaces of a fractured rock mass according to claim 6, characterized in that: Calculating the structural surface connectivity rate of the test area according to the structural surface connectivity rate of a single test block in step S5 includes: Repeat steps S1 to S4 to calculate the structural surface connectivity of other test blocks. The calculation formula of the structural surface connectivity rate K in the test area is:

8. An electronic device, comprising a processor and a memory, wherein the memory stores program instructions, characterized in that: The processor runs program instructions to implement the method for calculating the connectivity rate of structural surfaces of a fractured structural rock mass as described in any one of claims 1 to 7.

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