Prediction method for multi-layer accumulation-dumping type reservoir bank collapse and terminal equipment

Abstract

The invention belongs to the technical field of water conservancy and hydropower engineering and geotechnical engineering, and particularly discloses a prediction method and terminal equipment for multi-layer accumulation-dumping type reservoir bank collapse, and the prediction method comprises the steps: dividing a reservoir bank accumulation body into a plurality of blocks; acquiring the fracture water pressure of the failure surface of each block, and determining the stability coefficient of each block according to the fracture water pressure; dividing the reservoir bank accumulation body into a plurality of dumping areas with different dumping degrees according to the stability coefficient, and drawing an engineering geological profile map of the reservoir bank according to the boundaries of the dumping areas; and determining a stable slope angle of each measuring point on the engineering geological profile map, and predicting the bank collapse amount and the bank collapse width of the multilayer accumulation-dumping type reservoir according to the stable slope angle. According to the method, the reservoir bank accumulation body is divided into a plurality of dumping areas with different dumping degrees according to the stability coefficient determined by the fracture water pressure of the failure surface, so that the bank collapse prediction result conforms to the reality, and the stepped failure characteristics of the multi-layer accumulation-dumping type reservoir bank collapse can be reflected.

Description

Technical Field

[0001] The invention belongs to the technical field of water conservancy and hydropower engineering and geotechnical engineering, and discloses a prediction method for bank collapse of a multi-layer accumulation-dumping type reservoir and terminal equipment. Background Art

[0002] Reservoir bank collapse is a typical geological hazard after water storage in a reservoir area. It occurs frequently and is highly destructive in mountainous canyon-type reservoirs. Reservoir banks in mountainous canyon-type reservoirs often develop into multi-layered accumulation-dumping composite structures, primarily composed of loose Quaternary deposits. The mechanism of bank collapse is complex due to the coupled effects of reservoir water infiltration, water level fluctuations, and rock and soil deformation. Hydraulic action triggers seepage deformation of loose deposits and softening of rock structural surfaces. Periodic water level fluctuations exacerbate the erosion effect of dynamic water pressure on the rock and soil interface, while rock and soil fragmentation caused by dumping deformation further weakens shear strength. Traditional prediction methods face fundamental limitations. Classic models such as the Cacciakin method and the two-stage method simplify the geological structure into a homogeneous system and fail to consider the differences in stable slope angles in strong, medium, and weak dumping zones. This results in bank collapse predictions that differ significantly from actual results and makes it difficult to reflect the stepped failure characteristics of multi-layer accumulation-dumping reservoir bank collapse. Summary of the Invention

[0003] The purpose of the present invention is to provide a prediction method for bank collapse of multi-layer accumulation-dumping type reservoirs, so as to solve the technical problem that the existing prediction methods do not take into account the differences in stable slope angles of strong / medium / weak dumping areas, resulting in a large difference between the bank collapse prediction results and the actual results, and it is difficult to reflect the stepped destruction characteristics of the bank collapse of multi-layer accumulation-dumping type reservoirs.

[0004] A first aspect of the present invention provides a method for predicting bank collapse of a multi-layer accumulation-dumping type reservoir, comprising:

[0005] Divide the reservoir bank accumulation into multiple blocks;

[0006] Obtaining the fracture water pressure of each block failure surface, and determining the stability coefficient of each block according to the fracture water pressure;

[0007] Dividing the reservoir bank accumulation body into a plurality of dumping areas with different dumping degrees according to the stability coefficient, and drawing an engineering geological profile of the reservoir bank according to the boundary lines of the dumping areas;

[0008] The stable slope angle of the measuring point on the engineering geological profile is determined, and the bank collapse amount and bank collapse width of the multi-layer accumulation-dumping type reservoir are predicted based on the stable slope angle.

[0009] Preferably, the stability coefficient of each block is determined according to the fissure water pressure, specifically:

[0010] determining the anti-tilting moment of each block according to the fracture water pressure;

[0011] Determine the overturning moment of each block;

[0012] The stability coefficient of each block is determined according to the anti-tilting moment and the overturning moment.

[0013] Preferably, the anti-tilting moment of each block is determined according to the fissure water pressure, specifically:

[0014] determining the anti-sliding force of each block based on the fracture water pressure;

[0015] The anti-tilt moment of each block is determined according to the anti-slip force and the lever arm of the anti-slip force.

[0016] Preferably, the stability coefficient of each block is determined according to the anti-tilting moment and the overturning moment, specifically:

[0017] The stability coefficient of each block is determined according to the quotient of the anti-tilting moment and the overturning moment.

[0018] Preferably, an engineering geological profile of the reservoir bank is drawn according to the boundary line of the dumping area, specifically:

[0019] Drawing the boundary line of the engineering geological profile according to the surface line of the reservoir bank;

[0020] Draw the horizontal lithologic stratigraphic boundary line and the reservoir hydrological boundary line within the boundary line of the engineering geological profile, and draw the vertical dumping area boundary line within the boundary line of the engineering geological profile to obtain a grid-like engineering geological profile.

[0021] Preferably, the bank collapse amount and bank collapse width of a multi-layer accumulation-dumping type reservoir are predicted based on the stable slope angle, specifically:

[0022] Step A: taking the bottom of the boundary line of the engineering geological profile as a measuring point, drawing a straight line with the stable slope angle of the measuring point as an included angle, and determining the intersection of the straight line and the grid;

[0023] Step B, taking the intersection point as the measuring point, repeating step A until reaching the upper boundary line of the engineering geological profile, recording the intersection point of the straight line and the upper boundary line as the bank collapse point, and recording the broken line formed by the multiple straight lines as the bank collapse reconstruction line;

[0024] Step C: determining the bank collapse width according to the bank collapse point, and determining the bank collapse amount according to the bank collapse reconstruction line.

[0025] Preferably, the stable slope angle of the measuring point on the engineering geological profile is determined as follows:

[0026] When the measuring point is above the normal water level, the stable slope angle of the measuring point is determined according to the natural density and natural gravity of the measuring point;

[0027] When the measuring point is below the normal water level, the stable slope angle of the measuring point is determined based on the saturated density and saturated weight of the measuring point.

[0028] Preferably, the reservoir bank accumulation body is divided into a plurality of dumping areas with different dumping degrees according to the stability coefficient, specifically:

[0029] When the stability coefficient of the block is less than or equal to a first threshold, it is determined that the block is located in a strong dumping area;

[0030] When the stability coefficient of the block is greater than a first threshold value and less than or equal to a second threshold value, it is determined that the block is located in a middle dumping zone;

[0031] When the stability coefficient of the block is greater than the second threshold, it is determined that the block is located in the weak dumping area.

[0032] Preferably, the first threshold is 0.8-0.9; the second threshold is 1-1.1.

[0033] The second aspect of the present invention provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the processor implements the steps of a method for predicting bank collapse of a multi-layer accumulation-dumping type reservoir.

[0034] Compared with the prior art, the method and terminal device for predicting bank collapse of a multi-layer accumulation-dumping type reservoir of the present invention have the following beneficial effects:

[0035] The present invention introduces the fissure water pressure of the failure surface when determining the block stability coefficient, which is more in line with the bank slope pore water pressure condition and can judge the degree of bank collapse and toppling damage.

[0036] The present invention comprehensively considers the differentiated effects of three factors, namely, lithologic stratification, hydraulic conditions (underwater / abovewater), and toppling deformation intensity zoning, on the stable slope angle, and can accurately calculate the stable slope angle.

[0037] The present invention uses the "grid graphic method" analysis to realize the calculation and solution of the bank collapse boundary, bank collapse width and bank collapse amount under complex geological conditions, providing a quantitative prediction basis for the stability assessment of multi-layer accumulation-dumping type slopes and the reservoir bank reconstruction and protection design. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 The present invention is a flowchart of a method for predicting bank collapse in a multi-layer accumulation-dumping type reservoir according to an embodiment of the present invention.

[0039] Figure 2 This is a calculation diagram of the block stability coefficient in the prediction method for multi-layer accumulation-dumping type reservoir bank collapse in an embodiment of the present invention.

[0040] Figure 3 Schematic diagram of the “grid graphic method” for predicting bank collapse width according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] In the following description, specific details such as particular system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0042] The first aspect of an embodiment of the present invention provides a method for predicting the collapse of a multi-layer accumulation-dumping type reservoir bank, which is based on the following basic assumptions: ① It is assumed that the reservoir bank accumulation body is composed of countless blocks, and the dumping failure of the accumulation body is the dumping failure between blocks; ② There is no shear force transmission between blocks, and the dumping failure is mainly rotation; ③ The failure surface is a plane; ④ The water pressure is evenly distributed along the failure surface.

[0043] Based on the above assumptions, the prediction method for multi-layer accumulation-dumping type reservoir bank collapse in the embodiment of the present invention is as follows: Figures 1 to 3 As shown, the specific steps include:

[0044] Step 1: Divide the reservoir bank accumulation into multiple blocks.

[0045] Step 2: Obtain the fracture water pressure of each block failure surface and determine the stability coefficient of each block based on the fracture water pressure.

[0046] The embodiment of the present invention is combined with Figure 2 Determine the stability coefficient of the block. Figure 2 Middle block The point is the center of rotation and the collapse occurs; is the weight of the block itself; is the fracture water pressure on the failure surface of the block, which is evenly distributed vertically along the failure surface; is the inclination angle of the failure surface.

[0047] In the embodiment of the present invention, the anti-tilt moment generated by the anti-sliding force provided by the block failure surface is used to determine the stability coefficient of each block. and the overturning moment generated by the sliding component of the block's gravity along the failure surface .

[0048] The anti-tilting moment The determination process is as follows:

[0049] According to the assumption that there is no shear force transmission between blocks, the anti-slip force acting on the failure surface is composed of cohesion and friction (the weight component of the blocks and the water pressure):

[0050] Cohesion torque :

[0051] (1)

[0052] Where, is the cohesion of the block (kPa); is the area of ​​the damaged surface; is the lever arm, that is, the anti-slip force to the center of rotation distance.

[0053] Friction torque :

[0054] (2)

[0055] Again∵ (3)

[0056] ∴ (4)

[0057] Where, is the normal stress perpendicular to the failure surface (kPa); is the area of ​​the damaged surface; is the weight of the block itself; is the inclination angle of the failure surface; is the internal friction angle; is the lever arm; is the fracture water pressure on the block failure surface, is the density of loose accumulation (kN / m 3 ), when it is above the normal water level, the natural gravity is taken; when it is below the groundwater level, the saturated gravity is taken; is the depth from the normal water level to the calculation point (m).

[0058] Combining formula (1) and formula (4), we can get the anti-tilting moment :

[0059] (5)

[0060] Where, is the cohesion of the block (kPa); is the area of ​​the damaged surface; is the weight of the block itself; is the inclination angle of the failure surface; is the density of loose accumulation (kN / m 3 ), when it is above the normal water level, the natural gravity is taken; when it is below the groundwater level, the saturated gravity is taken; is the depth from the normal water level to the calculation point (m); is the internal friction angle; For the lever arm.

[0061] In the embodiment of the present invention, the overturning moment generated by the sliding component of the block gravity along the failure surface is The determination process is as follows:

[0062] Produced only by the gravitational glide component, we can obtain:

[0063] (6)

[0064] Where, is the weight of the block itself; is the inclination angle of the failure surface; is the mass weight component to the rotation point distance.

[0065] From the geometric relationship we can get:

[0066] (7)

[0067] Where, is the lever arm; is the inclination angle of the failure surface.

[0068] Substituting formula (7) into formula (6) and simplifying it:

[0069] (8)

[0070] Where, is the weight of the block itself; is the inclination angle of the failure surface; For the lever arm.

[0071] Obtaining the anti-tilt moment and overturning moment After that, the stability coefficient of the embodiment of the present invention is for:

[0072] (9)

[0073] In summary, the stability coefficient of each block is determined according to the fracture water pressure. Specifically, according to the fracture water pressure Determine the anti-tilting moment of each block ; Determine the overturning moment of each block ; According to the anti-tilting moment and overturning moment The stability coefficient of each block is determined by the quotient of .

[0074] The anti-tilting moment of each block is determined according to the fracture water pressure, specifically: the anti-sliding force of each block is determined according to the fracture water pressure: ; According to the anti-slip force and the force arm of the anti-slip force Determine the anti-tilting moment for each block.

[0075] Step 3: Divide the reservoir bank accumulation into multiple dumping areas with different dumping degrees according to the stability coefficient, and draw the engineering geological profile of the reservoir bank according to the boundary lines of the dumping areas, specifically:

[0076] Step 3.1: Divide the reservoir bank accumulation into multiple dumping areas with different dumping degrees according to the stability coefficient.

[0077] The embodiment of the present invention calculates the stability coefficient The recorded sampling location and depth are used to determine whether the original sample is in a strong dumping zone, a medium dumping zone, or a weak dumping zone. Specifically, when the stability coefficient of the block is less than or equal to a first threshold, the block is determined to be in a strong dumping zone; when the stability coefficient of the block is greater than the first threshold and less than or equal to a second threshold, the block is determined to be in a medium dumping zone; when the stability coefficient of the block is greater than the second threshold, the block is determined to be in a weak dumping zone. The first threshold is 0.8-0.9, preferably 0.85; the second threshold is 1-1.1, preferably 1.05.

[0078] For example, when When it is located in the strong dumping area; when When it is in the middle dumping area; when When it is located in the weak dumping area.

[0079] Step 3.2: Draw the engineering geological profile of the reservoir bank according to the boundary line of the dumping area, specifically:

[0080] Step 3.2.1. Draw the boundary line of the engineering geological profile according to the surface line of the reservoir bank.

[0081] Step 3.2.2: Draw the horizontal lithologic and stratigraphic boundary lines and the reservoir hydrological boundary lines within the boundary lines of the engineering geological profile, and draw the vertical dumping area boundary lines within the boundary lines of the engineering geological profile, to obtain a grid-like engineering geological profile.

[0082] The embodiment of the present invention first calibrates the key control interface: the surface line of the reservoir bank ( Figure 3 the original surface line in the middle of the reservoir), the boundary line of the dumping area, the lithologic and stratigraphic boundary line (stratum boundary 1, stratum boundary 2, the overlying layer is above stratum boundary 1, the interlayer is between stratum boundary 1 and stratum boundary 2, and the basement layer is below stratum boundary 2), and the reservoir hydrological boundary line (normal water storage level, dead water level).

[0083] In the embodiment of the present invention, it is assumed that the surface line of the reservoir bank is the upper boundary line and the right boundary line of the grid, and each control interface is "horizontally and vertically" and parallel to the surface line.

[0084] Step 4: Determine the stable slope angle of the measuring point on the engineering geological profile, and predict the bank collapse amount and width of the multi-layer accumulation-dumping type reservoir based on the stable slope angle, specifically:

[0085] Step 4.1: Determine the stable slope angle of the measuring point on the engineering geological profile.

[0086] According to the Mohr-Coulomb equation and the friction coefficient The definition of , establish formula (10).

[0087] (10)

[0088] Rearranging formula (10), we can obtain:

[0089] (11)

[0090] When the measuring point is above the normal water level, the stable slope angle is The calculation formula is as follows (12):

[0091] (12)

[0092] Where, is the cohesion of the block (kPa); is the natural density of the block; is the natural weight of the block; is the depth from the normal water level to the calculation point (m); is the internal friction angle.

[0093] When the measuring point is below the normal water level, the slope angle is stable. The calculation formula is as follows (13):

[0094] (13)

[0095] Where, is the cohesion of the block (kPa); is the saturation density of the block; is the saturation density of the block; is the depth from the normal water level to the calculation point (m); is the internal friction angle.

[0096] Step 4.2: Predict the bank collapse amount and width of the multi-layer accumulation-dumping reservoir based on the stable slope angle.

[0097] The embodiment of the present invention uses the "grid graphic method" to predict the bank collapse amount and bank collapse width of a multi-layer accumulation-dumping type reservoir, specifically:

[0098] Step A: Take the bottom of the boundary line of the engineering geological profile as the measuring point, draw a straight line with the stable slope angle of the measuring point as the included angle, and determine the intersection of the straight line and the grid;

[0099] Step B: using the intersection point as the measuring point, repeat step A until the upper boundary line of the engineering geological profile is reached, and the intersection point of the straight line and the upper boundary line is recorded as the bank collapse point, and the broken line formed by the multiple straight lines is recorded as the bank collapse reconstruction line;

[0100] Step C: Determine the bank collapse width based on the bank collapse point, and determine the bank collapse amount based on the bank collapse reconstruction line.

[0101] For example, Figure 3 As shown in the figure, the intersection point A of the bottom of the right boundary line of the engineering geological profile and the dead water level is taken as the measuring point, and the stable slope angle at the measuring point is taken as the Draw a straight line that intersects the boundary line of the strong-medium dumping area at point B; then use point B as the measuring point and the stable slope angle at point B. Draw a straight line that intersects the stratum boundary 2 at point C; then take point C as the measuring point and the stable slope angle at point C. Draw a straight line that intersects the boundary line of the medium-weak dumping area at point D; then take point D as the measuring point and take the stable slope angle at D as the Draw a straight line that intersects the stratum boundary 1 at point E; then take point E as the measuring point and the stable slope angle at E Draw a straight line that intersects the normal water level line at point F; then take point F as the measuring point and the stable slope angle at F Draw a straight line that intersects the upper boundary line at point G.

[0102] The horizontal distance between the intersection of the normal water level and the original surface line M~G is the predicted bank collapse width L of the multi-layer accumulation-dumping type reservoir.

[0103] A~G is the bank collapse reconstruction line after the reservoir is filled with water. The area to the right of the bank collapse reconstruction line multiplied by the length of the collapsed bank along the reservoir shoreline is the predicted bank collapse amount.

[0104] The specific operation process of using the method of the present invention to predict the bank collapse width and amount is as follows:

[0105] 1. Through on-site geological surveys and various exploration methods, accurately determine the scope of the accumulation body, draw a typical engineering geological profile of the accumulation body, including the height, slope angle and surface line of the accumulation body before the reservoir is filled with water, and obtain the characteristic water level of the reservoir (normal water level, dead water level).

[0106] 2. Determine the stratigraphic boundaries of the accumulation body, as well as the boundaries of strong dumping, medium dumping, and weak dumping.

[0107] Exploration holes are arranged at regular intervals at the front, middle, and rear of the accumulation body to accurately determine the stratigraphic structure of the accumulation body; the stability coefficient of the collapsed bank block is calculated according to formula (9): And determine the boundaries of strong dumping area, medium dumping area and weak dumping area: take original samples from the front, middle and rear of the accumulation body at certain intervals and depths for in-situ testing, and measure the physical and mechanical indicators of each stratum of the accumulation body, including: rock and soil density , internal friction angle , cohesion , fracture water pressure , natural weight , saturated heavy wait.

[0108] 3. Determine the stable slope angle .

[0109] 4. Based on the "grid graphic method" analysis process, the bank collapse is predicted to obtain the bank collapse reconstruction line, bank collapse width and bank collapse amount.

[0110] The present invention is a method for predicting bank collapse of multi-layer accumulation-dumping type reservoirs, which can calculate the stability coefficient of the collapsed bank block. , and then determine the strong-medium-weak dumping zoning; calculate the stable slope angles of different strata in different dumping areas; finally, predict the width and amount of bank collapse in multi-layer accumulation-dumping reservoirs.

[0111] The second aspect of the present invention provides a terminal device, including a memory, a processor, and a computer program stored in the memory and runnable on the processor. When the processor executes the computer program, the steps of the above-mentioned method for predicting bank collapse of multi-layer accumulation-dumping type reservoirs are implemented.

[0112] The present invention introduces the fissure water pressure of the failure surface when determining the block stability coefficient, which is more in line with the pore water pressure condition of the reservoir bank slope and can judge the degree of bank collapse and toppling damage.

[0113] The present invention comprehensively considers the differentiated effects of three factors, namely, lithologic stratification, hydraulic conditions (underwater / abovewater), and toppling deformation intensity zoning, on the stable slope angle, and can accurately calculate the stable slope angle.

[0114] The present invention uses the "grid graphic method" analysis to realize the calculation and solution of the bank collapse boundary, bank collapse width and bank collapse amount under complex geological conditions, providing a quantitative prediction basis for the stability assessment of multi-layer accumulation-dumping type slopes and the reservoir bank reconstruction and protection design.

[0115] The above descriptions are merely several embodiments of the present invention and do not constitute any form of limitation to the present invention. Although the present invention is disclosed as above in terms of preferred embodiments, they are not intended to limit the present invention. Any technician familiar with the present profession, without departing from the scope of the technical solution of the present invention, who makes slight changes or modifications using the technical contents disclosed above, is equivalent to an equivalent implementation case and falls within the scope of the technical solution.

Claims

1. A method for predicting bank collapse of multi-layer accumulation-dumping reservoir, characterized in that: include: Divide the reservoir bank accumulation into multiple blocks; Obtaining the fracture water pressure of each block failure surface, and determining the stability coefficient of each block according to the fracture water pressure; Dividing the reservoir bank accumulation body into a plurality of dumping areas with different dumping degrees according to the stability coefficient, and drawing an engineering geological profile of the reservoir bank according to the boundary lines of the dumping areas; The stable slope angle of the measuring point on the engineering geological profile is determined, and the bank collapse amount and bank collapse width of the multi-layer accumulation-dumping type reservoir are predicted based on the stable slope angle.

2. The method for predicting bank collapse of a multi-layer accumulation-dumping type reservoir according to claim 1, characterized in that: The stability coefficient of each block is determined according to the fracture water pressure, specifically: determining the anti-tilting moment of each block according to the fracture water pressure; Determine the overturning moment of each block; The stability coefficient of each block is determined according to the anti-tilting moment and the overturning moment.

3. The method for predicting bank collapse of a multi-layer accumulation-dumping type reservoir according to claim 2, characterized in that: The anti-tilting moment of each block is determined according to the fracture water pressure, specifically: determining the anti-sliding force of each block based on the fracture water pressure; The anti-tilt moment of each block is determined according to the anti-slip force and the lever arm of the anti-slip force.

4. The method for predicting bank collapse of a multi-layer accumulation-dumping type reservoir according to claim 2, characterized in that: The stability coefficient of each block is determined according to the anti-tilting moment and the overturning moment, specifically: The stability coefficient of each block is determined according to the quotient of the anti-tilting moment and the overturning moment.

5. The method for predicting bank collapse of a multi-layer accumulation-dumping type reservoir according to claim 1, characterized in that: Draw the engineering geological profile of the reservoir bank according to the boundary line of the dumping area, specifically: Drawing the boundary line of the engineering geological profile according to the surface line of the reservoir bank; Draw the horizontal lithologic stratum boundary line and the reservoir hydrological boundary line within the boundary line of the engineering geological profile, and draw the vertical dumping area boundary line within the boundary line of the engineering geological profile to obtain a grid-like engineering geological profile.

6. The method for predicting bank collapse of a multi-layer accumulation-dumping type reservoir according to claim 5, characterized in that: The bank collapse amount and width of the multi-layer accumulation-dumping type reservoir are predicted based on the stable slope angle, specifically: Step A: taking the bottom of the boundary line of the engineering geological profile as a measuring point, drawing a straight line with the stable slope angle of the measuring point as an included angle, and determining the intersection of the straight line and the grid; Step B, using the intersection point as a measuring point, repeating step A until reaching the upper boundary line of the engineering geological profile, recording the intersection point of the straight line and the upper boundary line as the bank collapse point, and recording the broken line formed by the multiple straight lines as the bank collapse reconstruction line; Step C: determining the bank collapse width according to the bank collapse point, and determining the bank collapse amount according to the bank collapse reconstruction line.

7. The method for predicting bank collapse of a multi-layer accumulation-dumping type reservoir according to claim 6, characterized in that: Determine the stable slope angle of the measuring point on the engineering geological profile, specifically: When the measuring point is above the normal water level, the stable slope angle of the measuring point is determined according to the natural density and natural gravity of the measuring point; When the measuring point is below the normal water level, the stable slope angle of the measuring point is determined based on the saturated density and saturated weight of the measuring point.

8. The method for predicting bank collapse of a multi-layer accumulation-dumping type reservoir according to claim 1, characterized in that: The reservoir bank accumulation body is divided into a plurality of dumping areas with different dumping degrees according to the stability coefficient, specifically: When the stability coefficient of the block is less than or equal to a first threshold, it is determined that the block is located in a strong dumping area; When the stability coefficient of the block is greater than a first threshold value and less than or equal to a second threshold value, it is determined that the block is located in a middle dumping zone; When the stability coefficient of the block is greater than the second threshold, it is determined that the block is located in the weak dumping area.

9. The method for predicting bank collapse of a multi-layer accumulation-dumping type reservoir according to claim 8, characterized in that: The first threshold is 0.8-0.9; the second threshold is 1-1.

1.

10. A terminal device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the method for predicting bank collapse of a multi-layer accumulation-dumping type reservoir as described in any one of claims 1 to 9 are implemented.

Images