Tunnel surrounding rock chain collapse disaster prediction method and system

Abstract

The invention discloses a tunnel surrounding rock chain collapse disaster prediction method and system, and the method comprises the steps: collecting rock mass structural plane information, and building a tunnel surrounding rock block model based on the rock mass structural plane information; all inner wall blocks are searched based on the tunnel surrounding rock block model, danger judgment is conducted on the inner wall blocks, and dangerous blocks in the inner wall blocks are found; contact blocks of the dangerous blocks are searched, block type discrimination is carried out on the contact blocks, and blocks which are not subjected to danger discrimination in the contact blocks are found; carrying out dangerousness judgment on the blocks which are not subjected to dangerousness judgment, and if the blocks are not dangerous blocks, ignoring the blocks; and if the blocks are dangerous blocks, searching, namely danger judgment, of the contact blocks of the dangerous blocks is repeated until the contact blocks of the dangerous blocks are not dangerous blocks, and information of all the dangerous blocks of the surrounding rock of the tunnel is obtained. Therefore, all dangerous blocks on the inner wall and all internal dangerous blocks in contact with the dangerous blocks on the inner wall can be found.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel engineering disaster prediction, and particularly relates to a method and system for predicting the disaster of chain collapse of tunnel surrounding rock. Background Art

[0002] The statements herein only provide the background art related to the present invention and do not necessarily constitute the prior art.

[0003] During the tunnel construction process, large-scale crossing of hard rock mass formations, the collapse disaster has become a major challenge for the safe construction of tunnel engineering. The essence of the collapse disaster is a catastrophic phenomenon in which a complex structure system composed of structural planes of different scales developed in the rock mass and rock blocks becomes unstable under excavation disturbance. Current technical means are difficult to accurately predict the block interaction relationship and the construction evolution process. There is a large deviation between the construction plan design and the actual demand for disaster control. The block collapse causes heavy casualties and economic and resource losses. Some existing collapse disaster prediction methods only stay in the identification of the dangerous collapse areas on the surface of the tunnel surrounding rock, and cannot accurately predict the possible chain collapse in the internal area of the surrounding rock. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above deficiencies existing in the prior art, and provide a method and system for predicting the disaster of chain collapse of tunnel surrounding rock to judge the chain collapse disaster during the tunnel construction process.

[0005] To achieve the above purpose, the present invention is implemented through the following technical solutions:

[0006] On the one hand, the technical solution of the present invention provides a method for predicting the disaster of chain collapse of tunnel surrounding rock, including:

[0007] Collect the information of the rock mass structural plane, and construct a tunnel surrounding rock block model based on the information of the rock mass structural plane;

[0008] Search all inner wall blocks based on the tunnel surrounding rock block model and judge the danger of the inner wall blocks to find the dangerous blocks among the inner wall blocks;

[0009] Search the contact blocks of the dangerous blocks, judge the block types of the contact blocks, and find the blocks among the contact blocks that have not been judged for danger;

[0010] Judge the danger of the blocks that have not been judged for danger. If it is not a dangerous block, it is ignored; if it is a dangerous block, repeat the search and danger judgment of the contact blocks of the dangerous blocks until the contact blocks of the dangerous blocks are not dangerous blocks, and obtain the information of all dangerous blocks of the tunnel surrounding rock.

[0011] In at least one embodiment, the information of the rock mass structural planes in the tunnel is collected through artificial geological logging or three-dimensional laser scanning.

[0012] In at least one embodiment, the specific operation of searching for all inner wall blocks based on the tunnel surrounding rock block model is as follows: By traversing the vertex coordinates of each face patch of the block and the coordinates of each point on the upper and lower edge faces, it is determined whether the included angle between vectors m1 and m2 is an obtuse angle. If so:

[0013] m1·m2 < 0

[0014] It indicates that this face patch is located on the inner wall surface of the tunnel, and the block where this face patch is located is an inner wall block. Wherein, m1 is the vector formed by connecting the vertex of this face patch with the point on the upper edge face, and m2 is the vector formed by connecting the vertex of this face patch with the point on the lower edge face.

[0015] In at least one embodiment, the specific operation of the danger discrimination is as follows: Using the normal vector n i =(A i , B i , C i ) of each structural plane of the block pointing to the inside of the block as the coefficients in A i x + B i y + C i z ≥ 0 to construct an inequality group, and solve the inequality group. If there is and only one set of solutions (0, 0, 0), it indicates that this block is not a dangerous block, otherwise this block is a dangerous block. Wherein, the number of inequalities in the inequality group is the same as the number of structural planes of the cut block.

[0016] In at least one embodiment, after searching for all the contact blocks of the dangerous block, the block type of these contact blocks is determined. If this contact block is an inner wall block, it is ignored, otherwise it is determined as an inner block and needs to be subjected to danger discrimination.

[0017] In at least one embodiment, a dangerous block vector array is formed with the contact vectors of the contact blocks, and the directions of the contact vectors in the vector array are judged in sequence;

[0018] If the direction of the contact vector is downward, this contact vector is ignored and the determination of the next vector direction continues; if the direction of the contact vector is upward, this contact vector is removed from the vector array and the danger of the block is discriminated;

[0019] If the discrimination result is a dangerous block, the determination and danger discrimination of the contact blocks of the dangerous block are repeated, otherwise this contact block is ignored and the judgment of the next block continues.

[0020] In at least one embodiment, the contact vectors in this vector array all point to the inside of the dangerous block.

[0021] On the other hand, the technical solution of the present invention also provides a prediction system for tunnel surrounding rock chain collapse disasters, including:

[0022] A model construction module, configured to: collect rock mass structural plane information and construct a tunnel surrounding rock block model based on the rock mass structural plane information;

[0023] An inner wall dangerous block discrimination module, configured to: search all inner wall blocks based on the tunnel surrounding rock block model and discriminate the danger of the inner wall blocks to find the dangerous blocks among the inner wall blocks;

[0024] A contact block search module, configured to: search for the contact blocks of the dangerous blocks, discriminate the block types of the contact blocks, and find the blocks among the contact blocks that have not been discriminated for danger;

[0025] A contact block discrimination module, configured to: discriminate the danger of the blocks that have not been discriminated for danger. If it is not a dangerous block, it is ignored; if it is a dangerous block, repeat the search and danger determination of the contact blocks of the dangerous blocks until the contact blocks of the dangerous blocks are not dangerous blocks, and obtain the information of all dangerous blocks of the tunnel surrounding rock.

[0026] The beneficial effects of the above technical solution of the present invention are as follows:

[0027] 1) A prediction method for tunnel surrounding rock chain collapse disasters of the present invention can find all the dangerous blocks on the inner wall of the tunnel surrounding rock and all the internal dangerous blocks contacted by the inner wall dangerous blocks, and can obtain information such as the positions and volumes of the blocks that may undergo chain collapse in the internal area of the surrounding rock. Furthermore, it can accurately predict the possible chain collapse in the internal area of the surrounding rock during the tunnel construction process.

[0028] 2) A prediction method for tunnel surrounding rock chain collapse disasters of the present invention innovates the discriminant method for movable blocks in the block theory. According to the contact vector, it judges whether a block will affect the blocks in contact with it after falling, improving the accuracy of identifying the blocks that may become unstable at each stage in the chain collapse and ensuring the accuracy of the prediction of tunnel surrounding rock chain collapse. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0030] Figure 1 is a flowchart of a prediction method for tunnel surrounding rock chain collapse disasters of the present invention;

[0031] Figure 2It is a schematic diagram of the relationship between contact blocks in a method for predicting the disaster of chain collapse of tunnel surrounding rock according to the present invention;

[0032] Figure 3 It is a schematic diagram of inner wall blocks and internal blocks in a method for predicting the disaster of chain collapse of tunnel surrounding rock according to the present invention;

[0033] Figure 4 It is an interface diagram for constructing a tunnel surrounding rock block model in a method for predicting the disaster of chain collapse of tunnel surrounding rock according to the present invention;

[0034] Figure 5 It is a schematic diagram of a tunnel surrounding rock block model constructed by a method for predicting the disaster of chain collapse of tunnel surrounding rock according to the present invention, where Figure 5 (a) is an overall schematic diagram, Figure 5 (b) is a schematic diagram of an explosion;

[0035] Figure 6 It is a schematic diagram of a tunnel inner wall patch in a method for predicting the disaster of chain collapse of tunnel surrounding rock according to the present invention;

[0036] Figure 7 is a schematic diagram of two viewing angles of the same block in a method for predicting the disaster of chain collapse of tunnel surrounding rock according to the present invention. Among them, Figure 7(a) is a schematic diagram of the block at the first viewing angle, and Figure 7(b) is a schematic diagram of the block at the second viewing angle. Detailed implementation manners

[0037] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanations of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0038] As introduced in the background art, the purpose of the present invention is to overcome the deficiencies existing in the above-mentioned prior art and provide a method and system for predicting the disaster of chain collapse of tunnel surrounding rock to judge the disaster of chain collapse during the tunnel construction process.

[0039] Example 1

[0040] In a typical implementation manner of the present invention, this embodiment discloses a method for predicting the disaster of chain collapse of tunnel surrounding rock, including:

[0041] S1. Collect information on rock mass structural planes and construct a tunnel surrounding rock block model based on the information on rock mass structural planes;

[0042] S2. Search all inner wall blocks based on the tunnel surrounding rock block model and judge the danger of the inner wall blocks to find the dangerous blocks among the inner wall blocks;

[0043] S3. Search for the contact blocks of the dangerous blocks; determine the block types of the contact blocks, and find the blocks among the contact blocks that have not undergone danger discrimination.

[0044] S4. Conduct danger discrimination on the blocks that have not undergone danger discrimination. If it is not a dangerous block, ignore it; if it is a dangerous block, repeat the search for the contact blocks of the dangerous blocks, that is, the danger determination, until all the contact blocks of the dangerous blocks are not dangerous blocks, and obtain the information of all the dangerous blocks of the tunnel surrounding rock.

[0045] The following is a detailed description in conjunction with Figure 1 - Figure 7.

[0046] In this embodiment, the block is an isolated structure formed by the complete cutting of the surrounding rock by structural planes and structural planes, excavation surfaces and structural planes, such as Figure 2 the shown Block 1, Block 2, Block 3, and Block 4; the dangerous block is a block that will inevitably become unstable without engineering anchoring measures under the action of only the self-weight of the block; the inner wall block is an isolated block formed by the cutting of the structural plane and the free face, that is, the block in contact with the tunnel excavation surface, such as Figure 3 the shown inner wall block; the isolated block formed by the cutting of the structural plane and the structural plane, that is, the block not in contact with the tunnel excavation surface is the internal block, such as Figure 3 the shown internal block; the contact block is all the blocks that have a common contact surface with this block, such as Figure 2 shown, the contact blocks of Block 1 are Block 2 and Block 4.

[0047] S1. Collect the information of the rock mass structural plane, and construct a block model of the tunnel surrounding rock based on the information of the rock mass structural plane.

[0048] In this field, the information of the rock mass structural plane refers to various tectonic relics (including faults, joints, bedding planes, and fracture zones, etc.) generated in the rock mass under the action of tectonic stress, which are two-dimensional planar geological interfaces with a certain direction, large extension, and small thickness. These structural planes cut the rock mass into a fractured body that is both continuous and discontinuous, and have an important impact on the stability, strength, and deformation characteristics of the rock mass.

[0049] In this embodiment, the information of the rock mass structural plane in the tunnel is collected through artificial geological logging or three-dimensional laser scanning. Based on the collected information of the rock mass structural plane, a block model of the tunnel surrounding rock is constructed through rock mass modeling software such as UDEC and 3DEC, such as Figure 4 shown, the constructed block model of the tunnel surrounding rock is as shown in Figure 5 (a) and Figure 5 (b).

[0050] S2. Search all inner wall blocks based on the tunnel surrounding rock block model and determine the danger of the inner wall blocks to find the dangerous blocks among the inner wall blocks.

[0051] There must be a plane as the contour surface of the tunnel inner wall for the dangerous blocks in the first batch of tunnel chain collapses. Therefore, in this embodiment, based on the real tunnel inner wall, a tunnel upper edge surface and a lower edge surface are assumed, and it is judged whether there is a patch on the tunnel inner wall for the block. If so, the block is a block on the tunnel inner wall, otherwise it is not, as Figure 6 shown.

[0052] Specifically, the method is to judge whether the included angle between vectors m1 and m2 is an obtuse angle by traversing the vertex coordinates of each patch of the block and the coordinates of each point on the upper and lower edge surfaces. If there is:

[0053] m1·m2 < 0

[0054] It indicates that the patch is on the tunnel inner wall surface, and the block where the patch is located is an inner wall block. Among them, m1 is the vector formed by connecting the vertex of the patch to the point on the upper edge surface, and m2 is the vector formed by connecting the vertex of the patch to the point on the lower edge surface.

[0055] After searching all inner wall blocks by the above method, the danger of the inner wall blocks is judged. In this embodiment, the judgment method of dangerous blocks is realized geometrically. After obtaining the vectors pointing to the inside of the block for each plane of each block on the tunnel inner wall, it can be judged whether the block is a dangerous block based on these vectors. And in this embodiment, a dangerous block is a block that will inevitably become unstable without engineering anchoring measures under the action of only the self-weight of the block. Its judgment method draws on the judgment criterion of movable blocks in block theory and is improved. The specific method is as follows:

[0056] Taking the normal vector n i = (A i , B i , C i ) of each structural plane of the block pointing to the inside of the block as the coefficients in A i x + B i y + C i z ≥ 0 to construct an inequality group, solve the inequality group. If there is and only one set of solutions (0, 0, 0), it means that the block is not a dangerous block, otherwise the block is a dangerous block. Among them, the number of inequalities in the inequality group is the same as the number of structural planes cutting the block.

[0057] As shown in Figures 7(a) and 7(b), taking a certain block on the tunnel inner wall as an example, the block contains a curved surface of the tunnel inner wall and three planes formed by being cut by structural planes. The normal vectors of the three planes formed by being cut by the structural planes pointing to the inside of the block are respectively denoted as n1, n2, and n3. Then there are:

[0058] n1 = (A1, B1, C1) (2)

[0059] n2 = (A2, B2, C2) (3)

[0060] n3 = (A3, B3, C3) (4)

[0061] Determine whether the block is a dangerous block by judging the solution situation of the inequality group (5). If there is and only one set of solutions (0, 0, 0), it means that the block is not a dangerous block; otherwise, the block is a dangerous block.

[0062]

[0063] Through the above-mentioned danger discrimination method, screen out the dangerous blocks among all the inner wall blocks, save the information of these dangerous blocks and mark them as the first batch of dangerous blocks.

[0064] S3. Search for the contact blocks of the dangerous blocks; conduct block type discrimination on the contact blocks to find the blocks among the contact blocks that have not undergone danger discrimination.

[0065] In this embodiment, the search for the blocks contacted by the dangerous blocks specifically includes two aspects. One is the search for the blocks contacted by the dangerous blocks on the inner wall, and the other is the search for the dangerous blocks contacted by the dangerous blocks inside. The search for the dangerous blocks contacted by the dangerous blocks on the inner wall is carried out one by one among the dangerous blocks after determining all the dangerous blocks on the inner wall blocks to find all the contact blocks of the dangerous blocks. The search for the dangerous blocks inside is carried out after finding the dangerous blocks inside, and it is the search for the contact blocks of all the found dangerous blocks inside.

[0066] The fall or sliding of a dangerous block can only affect the blocks it contacts. Therefore, making a correct judgment on whether the blocks contact each other is the premise for finding the dangerous blocks in the process of tunnel chain collapse. In this embodiment, the meaning of contact is that the shortest distance between two blocks is infinitely close to the thickness of the thin disc of the given structural plane. As Figure 2 shown, block 1 contacts block 2 and block 4, and does not contact block 3. That is, if block 1 is judged as a dangerous block, when the dangerous block 1 is removed (simulating the fall or sliding of the dangerous block 1), the newly added free face can only affect block 2 and block 4. That is, the contact blocks of the dangerous block 1 are block 2 and block 4, and block 3 is not a contact block of the dangerous block 1. Through this judgment method, search for the contact blocks of the first batch of dangerous blocks.

[0067] After all the contact blocks of all the first - batch dangerous blocks are searched, the block type of these contact blocks is determined. If the contact block is an inner - wall block, it is ignored (because the inner - wall block has already been judged for danger and there is no need for repeated judgment). If it is not, it is determined as an internal block and needs to be judged for danger. In this way, all the blocks that have not been judged for danger among the contact blocks of the first - batch dangerous blocks are found.

[0068] S4. Judge the danger of the blocks that have not been judged for danger. If it is not a dangerous block, it is ignored; if it is a dangerous block, repeat the search and danger judgment of the contact blocks of the dangerous block until the contact blocks of the dangerous block are all not dangerous blocks.

[0069] As Figure 1 shown, after determining the contact blocks of the dangerous block, find the contact vectors of these contact blocks to form a dangerous - block vector array. The contact vectors in this vector array all point to the inside of the dangerous block. In this embodiment, the contact vector refers to two vectors with opposite directions on the common contact surface of two mutually - contacting blocks, and these two vectors respectively point to the inside of the two mutually - contacting blocks. Therefore, in this vector array, one contact vector represents one common contact surface, and a block is composed of multiple common contact surfaces, that is, a block is composed of multiple contact vectors.

[0070] For a block, the directions of its contact vectors all point to the inside of the block. Therefore, judge the directions of the contact vectors in the dangerous - block vector array in turn. If the direction of the contact vector is downward, it means that the surface from which this contact vector starts is the common contact surface above the block, and removing the upper surface will not cause the block to fall, so this contact vector can be ignored and continue to judge the direction of the next vector; if the direction of the contact vector is upward, it means that the surface from which this contact vector starts is the common contact surface below the block. If the common contact surface below the block is lost (that is, the block in contact with the lower part of the block is removed), it is very likely that the block will fall. Therefore, remove this contact vector from the vector array, create a new free face and judge the danger of the block. If the judgment result is a dangerous block, repeat the determination and danger judgment of the contact blocks of the dangerous block, otherwise ignore this contact block and continue to judge the next block.

[0071] Specifically, judge the danger of all the found internal blocks. If the internal block is a dangerous block, save the relevant information of the block and mark it as the second - batch dangerous block; if the internal block is not a dangerous block, it is ignored.

[0072] Search for contact blocks of all the dangerous blocks in the second batch again, and find all the contact blocks of the dangerous blocks in the second batch. Determine the found contact blocks. If the block has been determined to be dangerous before, ignore it. Otherwise, determine the danger of the contact block, find the dangerous blocks inside, and mark the block in this step as the dangerous blocks in the third batch.

[0073] Then repeat the search for contact blocks and the determination of danger for the dangerous blocks in the third batch until the search stops when the contact blocks of all the dangerous blocks in the last batch are not dangerous blocks.

[0074] Through the above steps, all the dangerous blocks in each batch can be found, and the position, shape, volume and other information of all the dangerous blocks can be determined. By determining the information of the potentially unstable blocks in each stage of the progressive collapse, the prediction of the progressive collapse disaster of the tunnel surrounding rock can be realized.

[0075] Embodiment 2

[0076] In a typical implementation manner of the present invention, this embodiment discloses a prediction system for progressive collapse disasters of tunnel surrounding rock, including:

[0077] A model construction module, configured to: collect rock mass structural plane information, and construct a tunnel surrounding rock block model based on the rock mass structural plane information;

[0078] An inner wall dangerous block discrimination module, configured to: search for all inner wall blocks based on the tunnel surrounding rock block model and determine the danger of the inner wall blocks, and find the dangerous blocks among the inner wall blocks;

[0079] A contact block search module, configured to: search for the contact blocks of the dangerous blocks; determine the block types of the contact blocks, and find the blocks among the contact blocks that have not been determined to be dangerous;

[0080] A contact block discrimination module, configured to: determine the danger of the blocks that have not been determined to be dangerous. If it is not a dangerous block, ignore it; if it is a dangerous block, repeat the search for the contact blocks of the dangerous block and the determination of danger until the contact blocks of the dangerous block are not dangerous blocks, and obtain the information of all the dangerous blocks of the tunnel surrounding rock.

[0081] Embodiment 3

[0082] In a typical implementation manner of the present invention, this embodiment discloses a computing device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the steps of the above prediction method for progressive collapse disasters of tunnel surrounding rock are implemented.

[0083] Embodiment 4

[0084] In a typical embodiment of the present invention, this embodiment discloses a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, it performs the steps of the above-mentioned tunnel surrounding rock chain collapse disaster prediction method.

[0085] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A tunnel surrounding rock chain collapse disaster prediction method, characterized in that: include: Collecting rock mass structural surface information, and constructing a tunnel surrounding rock block model based on the rock mass structural surface information; Based on the tunnel surrounding rock block model, all inner wall blocks are searched and dangerousness judgement is performed on the inner wall blocks to find dangerous blocks among the inner wall blocks; Searching for contact blocks of the dangerous block, performing block type identification on the contact blocks, and finding blocks in the contact blocks that have not been identified as dangerous; Performing a hazard assessment on the block that has not been assessed for hazard, and ignoring it if it is not a hazard block; If it is a dangerous block, the search for the contact blocks of the dangerous block, that is, the dangerousness judgment, is repeated until the contact blocks of the dangerous block are no longer dangerous blocks, and the information of all dangerous blocks in the tunnel surrounding rock is obtained.

2. A tunnel surrounding rock chain collapse disaster prediction method according to claim 1, characterized in that: The rock structure surface information in the tunnel is collected through manual geological cataloging or 3D laser scanning.

3. A tunnel surrounding rock chain collapse disaster prediction method according to claim 1, characterized in that: The specific method of searching all inner wall blocks based on the tunnel surrounding rock block model is as follows: by traversing the vertex coordinates of each facet of the block and the coordinates of each point on the upper and lower edge surfaces, it is determined whether the angle between vectors m1 and m2 is an obtuse angle. If so: m1·m2<0 It means that the patch is located on the inner wall of the tunnel, and the block where the patch is located is the inner wall block; among them, m1 is the vector formed by connecting the vertex of the patch with the point on the upper edge surface, and m2 is the vector formed by connecting the vertex of the patch with the point on the lower edge surface.

4. A tunnel surrounding rock chain collapse disaster prediction method according to claim 1, characterized in that: The specific hazard determination is: i =(A i ,B i ,C i ) as A i x+B i y+C i The coefficients in z≥0 construct an inequality group and solve the inequality group. If there is only one solution (0, 0, 0), it means that the block is not a dangerous block, otherwise the block is a dangerous block; the number of inequalities in the inequality group is the same as the number of structural surfaces that cut the block.

5. A tunnel surrounding rock chain collapse disaster prediction method according to claim 1, characterized in that: After searching for all contact blocks of the dangerous block, the block types of these contact blocks are determined. If the contact block is an inner wall block, it is ignored. Otherwise, it is determined to be an internal block and requires dangerousness judgment.

6. A tunnel surrounding rock chain collapse disaster prediction method according to claim 1, characterized in that: Forming a dangerous block vector array with the contact vectors of the contact blocks, and judging the directions of the contact vectors in the vector array in turn; If the direction of the contact vector is downward, the contact vector is ignored and the next vector direction is determined; if the direction of the contact vector is upward, the contact vector is removed from the vector array and the block danger determination is performed; If the judgment result is a dangerous block, the determination of the contact block of the dangerous block and the dangerousness judgment are repeated; otherwise, the contact block is ignored and the judgment of the next block is continued.

7. A tunnel surrounding rock chain collapse disaster prediction method as claimed in claim 6, characterized in that: The contact vectors in the vector array all point to the inside of the dangerous block.

8. A tunnel surrounding rock chain collapse disaster prediction system, characterized in that: include: The model building module is configured to: collect rock mass structural surface information, and build a tunnel surrounding rock block model based on the rock mass structural surface information; The inner wall dangerous block identification module is configured to: search all inner wall blocks based on the tunnel surrounding rock block model and identify the dangerousness of the inner wall blocks to find the dangerous blocks in the inner wall blocks; The contact block search module is configured to: search for contact blocks of the dangerous block, identify the contact blocks by block type, and find blocks in the contact blocks that have not been identified as dangerous; The contact block identification module is configured to: identify the block that has not been identified as dangerous, and ignore it if it is not a dangerous block; If it is a dangerous block, the search for the contact blocks of the dangerous block, that is, the dangerousness judgment, is repeated until the contact blocks of the dangerous block are no longer dangerous blocks, and the information of all dangerous blocks in the tunnel surrounding rock is obtained.

9. A computing device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any of the methods described in claims 1 to 7 when executing the program.

10. A computer-readable storage medium having a computer program stored thereon, wherein when the program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are performed.

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