Method and system for calculating granular mixture particle size decline for blocking concentrated leakage channel of earth and rockfill dam body

Abstract

The invention discloses a granular mixture particle size decreasing calculation method and system for blocking a concentrated leakage channel of an earth and rockfill dam body. The method comprises the steps that the dry volume weight rs and the dry density rho s of granular mixtures are obtained; establishing a corresponding relation between granular mixtures with different particle sizes and sizes; respectively establishing calculation formulas of underwater weight Gi, drag force FDi and uplift force FLi of the granular mixture, and then establishing a moment balance calculation formula based on Gi, FDi and FLi; establishing a relational expression between the particle size Di and the water flow velocity Vi; the particle sizes Di-1 and Di of granular mixtures required by the (i-1) th plugging and the ith plugging are calculated through a pigment tracing test on site; judging whether the difference value of the particle sizes Di-1 and Di of the granular mixtures required by the (i-1) th plugging and the ith plugging meets a set condition or not, and if so, not further plugging; if not, further plugging is needed. The problems of horizontal conveying and range control of coarse aggregates during leakage plugging are solved, and the problem of flowing water plugging of a leakage channel with the dam leakage flow reaching the m < 3 > / s level and the section reaching the m < 2 > level is solved.

Description

Technical Field

[0001] The invention relates to the field of water conservancy and hydropower engineering, and in particular to a method and system for calculating the decreasing particle size of granular bodies for blocking concentrated leakage channels of an earth-rock dam body. Background Art

[0002] There are 98,600 reservoir dams in service in my country. Since 1954, more than 3,500 dams have collapsed. Dam collapse caused by leakage ranks first among the causes of dam failure. Under the action of long-term high water head, the performance of the dam body and foundation deteriorates, and dam leakage is inevitable. If the leakage reaches m 3 / s level, especially the risk of earth-rock dam collapse has increased significantly, posing a serious threat to people's livelihood security.

[0003] m 3 / S-class earth-rock dam concentrated leakage is a precursor to dam failure. It has the characteristics of large cross-section, large flow and high flow velocity. The water flow continues to scour the dam filling material. If it is not blocked in time, it will easily lead to catastrophic consequences. In addition, underground karst water seepage problems are often encountered in southwest my country, posing a major threat to project safety. For example: at the end of 2008, during the trial water storage of a large hydropower station in Guizhou, the karst cave connected to the No. 1 diversion tunnel was penetrated by the upstream reservoir water, and the water seepage flow reached 40.0m 3 / s, nearly causing huge economic losses due to the one-year delay in power generation. The water blocking of the deep channel of the dam body and foundation is a deep underground hidden project with complex technology and great construction difficulty.

[0004] In response to the difficulty of emptying and plugging the reservoir during rescue operations and the lack of rapid rescue and plugging technology, the engineering community has proposed a method of throwing coarse particles into the channel to block the leakage path of the dam body, namely the method of throwing loose particles to plug the channel. The technical principle of this method is to throw loose particles into the deep permeable channel of the dam foundation through large-diameter holes on the ground, so that the water-passing section of the leakage channel in the dam body is gradually reduced until the entire section of the leakage channel is filled with loose particles to achieve the initial water plugging effect. Then, the loose particles are used as the skeleton for anti-seepage grouting to achieve complete water plugging. However, some people believe that with the throwing of sand and pebbles, the flow section of the water blocking section is reduced, the water flow velocity is bound to increase, and the sand and pebbles are bound to be washed away by the water flow, making it difficult to achieve the purpose of water plugging. In addition, since there is no theoretical guidance at present, some people still have doubts about throwing loose particles. Summary of the invention

[0005] In order to solve the problems of reduced flow section, increased water velocity, easy washing away of granular bodies by water flow, and unsatisfactory plugging effect when using conventional casting method for emergency plugging of concentrated leakage channels in earth-rock dam bodies, the present invention is based on the principle of progressive filling with decreasing particle size, and proposes a method and system for calculating the stable particle size of granular bodies for plugging concentrated leakage channels in earth-rock dam bodies. Through the reverse reconstruction of the anti-filter plugging method of "progressive filling with decreasing particle size materials", the leakage path of dam body particles is blocked, and the leakage control goal of "active interception + hydraulic transition + anti-filtration protection" is achieved, which solves the problem of horizontal transportation and range control of coarse granular materials during leakage plugging, and overcomes the problem of dam body leakage flow rate of m 3 / s level, cross section up to m 2 It can be specially used for emergency plugging of concentrated leakage channels in earth-rock dam bodies and reinforcement of leakage prevention in earth-rock dam bodies.

[0006] In order to solve the above technical problems, the present invention is implemented by the following technical solutions:

[0007] In a first aspect, the present invention provides a method for calculating the particle size reduction of granular material for blocking the concentrated leakage channel of an earth-rock dam body, comprising:

[0008] According to the test, the dry bulk density r of the granular body is obtained s and dry density ρ s ;

[0009] Establish the corresponding relationship between granular bodies of different particle sizes and their sizes through measurement and calculation;

[0010] Establish the underwater weight G i , drag force F Di And the upper force F Li The calculation formula is based on G i 、F Di and F Li Establish the moment balance calculation formula;

[0011] Based on the moment balance calculation formula, the particle size D is established. i With water flow velocity V i The relationship between

[0012] Based on the established particle size D i With water flow velocity V i The relationship between the two is used to calculate the particle size D required for the i-1th and i-th plugging through the on-site pigment tracer test. i-1 , D i ;

[0013] Determine the particle size D required for the i-1th and i-th plugging i-1 , D iWhether the difference meets the set conditions, if so, no further blocking is required; if not, further blocking is required.

[0014] As a further technical solution of the present invention, the step of establishing the corresponding relationship between the granular bodies of different particle sizes and the sizes by measuring and calculating comprises:

[0015] Through the on-site measurement of granular bodies, the length B of granular bodies with different particle sizes of 5 to 250 mm is obtained. i , Width L i , high H i Size, particle size difference is 20mm, establish D i ~f(B i , L i , H i ) between them.

[0016] As a further technical solution of the present invention, the underwater weight G is established respectively. i , drag force F Di And the upper force F Li The calculation formula is as follows:

[0017] G i =1 / 6×(r s -r)×π×D i 3 (1)

[0018]

[0019] The G-based i 、F Di and F Li The torque balance calculation formula is as follows:

[0020] F Di ×L Di +F Li ×L Li =G i ×L Gi (4)

[0021] In formula (2) to formula (4), C Di is the flow resistance coefficient; C Li is the lifting coefficient; by establishing D i ~f(B i , L i , H i ) corresponding relationship, we can find L Gi =L Li =1 / 2×L i , L Di =H i .

[0022] As a further technical solution of the present invention, the particle size D i With water flow velocity V i The relationship between them is as follows:

[0023]

[0024] ξ i =(4 / 3×L Gi / (C Li ×L Li +C Di ×L Di )) 1 / 2 (6)

[0025] In formula (6), ξ i is the process parameter; C Di is the flow resistance coefficient; C Li is the lifting coefficient; by establishing D i ~f(B i , L i , H i ) corresponding relationship, we can find L Gi =L Li =1 / 2×L i , L Di =H i .

[0026] As a further technical solution of the present invention, the particle size D required for the i-1th and i-th plugging is calculated as follows: i-1 , D i The steps include:

[0027] The average water velocity V1 in the channel before the first plugging is calculated through the pigment tracer test, and the particle size D1 required for the first plugging is calculated;

[0028] Repeat the pigment tracing test and particle size calculation to calculate the particle size D required for the i-1th and i-th plugging. i-1 , D i .

[0029] As a further technical solution of the present invention, the non-uniformity coefficient C of the granular body u and the curvature coefficient C C The calculation formula is as follows:

[0030] C u =D max / D min (7)

[0031] C c =D avg2 / (D min ×D max ) (8)

[0032] D min =min(D1, D2…D i-1 , D i ) (9)

[0033] D avg =(D1+D2+…+D i-1 +D i ) / i (10)

[0034] D min =max(D1, D2…D i-1 , D i ) (11)

[0035] Among them, the non-uniformity coefficient C u Required to be greater than or equal to 5, curvature coefficient C C The requirement is between 1 and 3.

[0036] As a further technical solution of the present invention, the particle size D i-1 , D i The difference of meets the setting condition: (D i-1 -D i ) / D i-1 ≤10%.

[0037] In a second aspect, the present invention provides a system based on the method for calculating the decrease in particle size of granular material for blocking the concentrated leakage channel of the earth-rock dam body, the system comprising:

[0038] Bulk material physical parameter determination module: used to obtain the dry bulk density and dry density of bulk materials according to the test;

[0039] Particle size and size correspondence establishment module: through measurement and calculation, establish the correspondence between particles of different particle sizes and sizes;

[0040] Mechanical balance calculation module: including underwater weight calculation unit, drag force calculation unit and lifting force calculation unit, and based on the data output by these calculation units, establish the moment balance calculation formula to evaluate the stability of granular bodies in water flow;

[0041] Particle size and water flow velocity relationship model construction module: Based on the moment balance calculation formula, the relationship between particle size and water flow velocity is constructed to predict the required particle size of the granular body under different water flow velocities;

[0042] Plugging particle size calculation and field test module: using the pigment tracer test, combined with the particle size and water flow velocity relationship model, calculate the particle size of the granular body required for the i-1th and ith plugging, and implement the plugging on site;

[0043] Plugging effect evaluation module: Determine whether the difference in particle size between the i-1th and i-th plugging meets the set conditions. If so, it is determined that no further plugging is required; if not, further plugging is required until the set conditions are met.

[0044] In a third aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for calculating the decrease in particle size of granular material for blocking concentrated seepage channels in an earth-rock dam body.

[0045] In a fourth aspect, the present invention provides a computer device, including a processor and a memory, wherein the memory stores a computer program, and when the processor executes the computer program, it implements the method for calculating the decrease in particle size of granular material for blocking concentrated leakage channels of an earth-rock dam body.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] (1) Based on the principle of "progressive filling of decreasing particle size materials", the present invention proposes a new method for calculating the stable particle size of granular bodies for plugging concentrated leakage channels in earth-rock dam bodies. This method gradually reduces the particle size of granular bodies and utilizes the anti-filtration protection between granular bodies, effectively solving the problem of plugging failure caused by the conventional throwing method due to uniform particle size and lack of anti-filtration protection.

[0048] (2) The present invention determines the stability of granular bodies under different water flow conditions by measuring detailed physical parameters (such as dry bulk density and dry density), establishing the corresponding relationship between particle size and size, and based on a mechanical equilibrium calculation model. This method provides an accurate theoretical basis, making the plugging operation more scientific and reasonable. At the same time, the method also takes into account multiple factors such as water flow velocity, granular body particle size, drag force, and lifting force, making the calculation results more accurate and able to guide on-site personnel to perform accurate plugging operations.

[0049] (3) Use dye tracer tests and other methods to directly obtain the actual water flow velocity in the seepage channel, and adjust the particle size of the granular material used for subsequent plugging accordingly. This method based on measured data ensures that each plugging can make the best response to the current situation, thereby gradually achieving the ideal plugging effect.

[0050] (4) For m 3 / s-level large flow leakage problem, the present invention not only takes into account the initial plugging effect, but also pays attention to the long-term anti-seepage performance. By setting the requirements for the uneven coefficient and curvature coefficient of the granular body, a good grading relationship between the fillers is ensured, a stable anti-filtration layer is formed, the loss of fine particles is effectively prevented, and the dam structure is further strengthened.

[0051] (5) The method of the present invention is not only applicable to the emergency blocking of concentrated leakage channels in earth-rock dam bodies, but can also be widely used in leakage prevention and reinforcement projects in earth-rock dam bodies. The application of this method will greatly improve the safety and stability of dams and provide a strong guarantee for the sustainable development of water conservancy and hydropower projects.

[0052] (6) The calculation method of the stable particle size of bulk solids is reasonable and feasible, the parameters are easy to obtain, and it is convenient for practical engineering operations, providing a good theoretical basis for engineering implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 The figure is a calculation flow chart of the present invention.

[0054] Figure 2 It is a schematic diagram of the structure of the force calculation model of the concentrated leakage channel granular body of the present invention. DETAILED DESCRIPTION

[0055] The specific implementation of the present invention is described below in conjunction with the accompanying drawings to facilitate the understanding of the present invention by those skilled in the art. Obviously, the present invention is not limited to the scope of the specific implementation. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention defined and determined by the attached claims, these changes are non-creative work, and all inventions and creations using the invention concept of this law are protected.

[0056] Example 1

[0057] like Figure 1 As shown, this embodiment provides a method for calculating the particle size reduction of granular material for blocking the concentrated leakage channel of the earth-rock dam body, and the specific steps are as follows:

[0058] (1) Obtain the dry bulk density r of the granular material based on the test s (N / cm 3 ) and dry density ρ s (g / cm 3 ), r is the water density (N / cm 3 ).

[0059] (2) Establish the corresponding relationship between granular bodies of different particle sizes and their dimensions through measurement and calculation.

[0060] Specifically: Through the on-site measurement of granular bodies, different particle sizes of 5mm to 250mm are obtained (the equivalent particle size conversion method is adopted, that is, the volume of a sphere with equivalent diameter is equivalent to the volume of a hexahedron, D i =(6×B i ×L i ×H i / π)) 1 / 3 ) of the granular body i , Width L i , high H i The representative size is 20 mm, and D i ~f(B i , L i , H i ) can be expressed in a table or by a simulation function.

[0061] (3) Establish the underwater weight G of the granular body i , the drag force F of the water flow Di And the upper force F Li The calculation formula, without considering cohesion and penetration, is based on G i 、F Di and F Li Establish the moment balance calculation formula, where F Di 、F Li The starting torque of the granular body, G i The calculation model of the drag force, lifting force and gravity of the granular body in the seepage channel is shown in Figure 1. Figure 2 shown.

[0062] Specifically: Establish the underwater weight G i , drag force F Di And the upper force F Li The calculation formula is as follows:

[0063] G i =1 / 6×(r s -r)×π×D i 3 (1)

[0064]

[0065] Based on G i 、F Di and F Li The torque balance calculation formula is as follows:

[0066] F Di ×L Di +F Li ×L Li =G i ×LGi (4)

[0067] In formula (2) to formula (4), C Di is the flow resistance coefficient, C Di ≈1.0; C Li is the lifting coefficient, C Li ≈1.0; by establishing D i ~f(B i , L i , H i ) corresponding relationship, we can find L Gi =L Li =1 / 2×L i , L Di =H i .

[0068] (4) Based on the moment balance calculation formula, establish the particle size D i With water flow velocity V i The relationship between .

[0069] Specific: Establish particle size D i With water flow velocity V i The relationship between them is as follows:

[0070]

[0071] ξ i =(4 / 3×L Gi / (C Li ×L Li +C Di ×L Di )) 1 / 2 (6)

[0072] In formula (6), ξ i is the process parameter.

[0073] (5) Based on the established particle size D i With water flow velocity V i The relationship between the two is used to calculate the particle size D required for the i-1th and i-th plugging through the on-site pigment tracer test. i-1 , D i .

[0074] Specifically: Through the on-site pigment tracing test, colored pigments are poured into the channel, and the time when the pigments are found at the outlet is measured. The average flow velocity V1 (m / s) of the water flow in the channel before the first plugging is calculated and substituted into formula (5) to calculate the particle size D1 required for the first plugging. Based on this, the first granular plugging throwing is carried out;

[0075] After the first casting is completed, wait until the water flow at the leakage channel outlet is stable, and then pour the color pigment into the channel for the second time, measure the time when the pigment is found at the outlet, and calculate the average flow velocity V2 (m / s) of the water flow in the channel before the second plugging, so as to calculate the particle size D2 of the granular body required for the second plugging, and use this as a basis to carry out the second granular body plugging casting;

[0076] The same method is used to obtain the average flow velocity V of the i-1th and i-th water flows through the pigment tracer test. i-1 (m / s), V i (m / s), thus calculating the particle size D required for the i-1th and i-th plugging i-1 , D i .

[0077] (6) Determine the particle size D required for the i-1th and i-th plugging i-1 , D i Does the difference between the two satisfy the set condition (D i-1 -D i ) / D i-1 ≤10%, if so, no further plugging is required; if it does not meet the requirements, further plugging is required.

[0078] Furthermore, the non-uniformity coefficient C of the granular body u and the curvature coefficient C C The calculation formula is as follows:

[0079] C u =D max / D min (7)

[0080] C c =D avg 2 / (D min ×D max ) (8)

[0081] D min =min(D1, D2…D i-1 , D i ) (9)

[0082] D avg =(D1+D2+…+D i-1 +D i ) / i (10)

[0083] D min =max(D1, D2…D i-1 , D i ) (11)

[0084] Among them, for the non-uniformity coefficient C of the granular body u Required to be greater than or equal to 5, curvature coefficient C C The requirement is between 1 and 3.

[0085] Example 2

[0086] A system based on the method for calculating the decrease in particle size of granular material for blocking the concentrated leakage channel of an earth-rock dam body, the system comprising:

[0087] Bulk material physical parameter determination module: used to obtain the dry bulk density and dry density of bulk materials according to the test;

[0088] Particle size and size correspondence establishment module: through measurement and calculation, establish the correspondence between particles of different particle sizes and sizes;

[0089] Mechanical balance calculation module: including underwater weight calculation unit, drag force calculation unit and lifting force calculation unit, and based on the data output by these calculation units, establish the moment balance calculation formula to evaluate the stability of granular bodies in water flow;

[0090] Particle size and water flow velocity relationship model construction module: Based on the moment balance calculation formula, the relationship between particle size and water flow velocity is constructed to predict the required particle size of the granular body under different water flow velocities;

[0091] Plugging particle size calculation and field test module: using the pigment tracer test, combined with the particle size and water flow velocity relationship model, calculate the particle size of the granular body required for the i-1th and ith plugging, and implement the plugging on site;

[0092] Plugging effect evaluation module: Determine whether the difference in particle size between the i-1th and i-th plugging meets the set conditions. If so, it is determined that no further plugging is required; if not, further plugging is required until the set conditions are met.

[0093] Example 3

[0094] This embodiment provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, the method for calculating the decrease in particle size of granular material for blocking the concentrated leakage channel of the earth-rock dam body described in Embodiment 1 is implemented.

[0095] Example 4

[0096] This embodiment provides a computer device, including a processor and a memory, wherein the memory stores a computer program, and when the processor executes the computer program, the method for calculating the decrease in particle size of granular material for blocking the concentrated leakage channel of the earth-rock dam body described in Example 1 is implemented.

[0097] The present invention provides a system, a computer-readable storage medium and a computer device based on the method. These technical integration and intelligent means make the plugging operation more convenient and efficient, and also provide a technical basis for future intelligent dam management.

[0098] In summary, the present invention has significant innovation and practicality in solving the problem of blocking concentrated leakage channels in the earth-rock dam body. It not only improves the blocking efficiency and effect, but also provides a strong guarantee for the safe operation of water conservancy and hydropower projects.

[0099] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0100] The contents not described in detail in the specification of the present invention belong to the prior art known to the professional and technical personnel in this field.

Claims

1. A method for calculating the decreasing particle size of granular material for blocking the concentrated leakage channel of earth-rock dam, characterized in that: include: According to the test, the dry bulk density r of the granular body is obtained s and dry density ρ s ; Establish the corresponding relationship between granular bodies of different particle sizes and their sizes through measurement and calculation; Establish the underwater weight G of the granular body i , the drag force F of the water flow Di And the upper force F Li The calculation formula is based on G i 、F Di and F Li Establish the moment balance calculation formula; Based on the moment balance calculation formula, the particle size D is established. i With water flow velocity V i The relationship between Based on the established particle size D i With water flow velocity V i The relationship between the two is used to calculate the particle size D required for the i-1th and i-th plugging through the on-site pigment tracer test. i-1 , D i ; Determine the particle size D required for the i-1th and i-th plugging i-1 , D i Whether the difference meets the set conditions, if so, no further blocking is required; if not, further blocking is required.

2. The method for calculating the decreasing particle size of granular material for blocking the concentrated leakage channel of the earth-rock dam body according to claim 1 is characterized in that: The step of establishing the corresponding relationship between the granular bodies with different particle sizes and the sizes by measuring and calculating comprises: Through the on-site measurement of granular bodies, the length B of granular bodies with different particle sizes of 5 to 250 mm is obtained. i , Width L i , high H i Size, particle size difference is 20mm, establish D i ~f(B i , L i , H i ) between them.

3. The method for calculating the decreasing particle size of granular material for blocking the concentrated leakage channel of the earth-rock dam body according to claim 1 is characterized in that: The underwater weight G of the granular body is established respectively. i , the drag force F of the water flow Di And the upper force F Li The calculation formula is as follows: G i =1 / 6×(r s -r)×π×D i 3 (1) The G-based i 、F Di and F Li The torque balance calculation formula is as follows: F Di ×L Di +F Li ×L Li =G i ×L Gi (4) In formula (2) to formula (4), C Di is the flow resistance coefficient; C Li is the lifting coefficient; by establishing D i ~f(B i , L i , H i ) corresponding relationship, we can find L Gi =L Li =1 / 2×L i , L Di =H i .

4. The method for calculating the decreasing particle size of granular material for blocking the concentrated leakage channel of the earth-rock dam body according to claim 1 is characterized in that: The established particle size D i With water flow velocity V i The relationship between them is as follows: x i =(4 / 3×L Gi / (C Li ×L Li +C Di ×L Di )) 1 / 2 (6) In formula (6), ξ i is the process parameter; C Di is the flow resistance coefficient; C Li is the lifting coefficient; by establishing D i ~f(B i , L i , H i ) corresponding relationship, we can find L Gi =L Li =1 / 2×L i , L Di =H i .

5. The method for calculating the decreasing particle size of granular material for blocking the concentrated leakage channel of the earth-rock dam body according to claim 1 is characterized in that: The calculation results in the particle size D required for the i-1th and i-th plugging. i-1 , D i The steps include: The average water velocity V1 in the channel before the first plugging is calculated through the pigment tracer test, and the particle size D1 required for the first plugging is calculated; Repeat the pigment tracing test and particle size calculation to calculate the particle size D required for the i-1th and i-th plugging. i-1 , D i .

6. The method for calculating the decreasing particle size of granular material for blocking the concentrated leakage channel of the earth-rock dam body according to claim 1 is characterized in that: The non-uniformity coefficient C of the granular body u and the curvature coefficient C C The calculation formula is as follows: C u =D max / D min (7) C c =D avg 2 / (D min ×D max ) (8) D min =min(D1,D2…D i-1 ,D i ) (9) D avg =(D1+D2+…+D i-1 +D i ) / i (10) D min =max(D1,D2…D i-1 ,D i ) (11) Among them, the non-uniformity coefficient C u Required to be greater than or equal to 5, curvature coefficient C C The requirement is between 1 and 3.

7. The method for calculating the decreasing particle size of granular material for blocking the concentrated leakage channel of the earth-rock dam body according to claim 1 is characterized in that: The particle size D i-1 , D i The difference of meets the setting condition: (D i-1 -D i ) / D i-1 ≤10%.

8. A system based on the method for calculating the decrease in particle size of granular material for blocking the concentrated leakage channel of an earth-rock dam body according to any one of claims 1 to 7, characterized in that: The system comprises: Bulk material physical parameter determination module: used to obtain the dry bulk density and dry density of bulk materials according to the test; Particle size and size correspondence establishment module: through measurement and calculation, establish the correspondence between particles of different particle sizes and sizes; Mechanical balance calculation module: including underwater weight calculation unit, drag force calculation unit and lifting force calculation unit, and based on the data output by these calculation units, establish the moment balance calculation formula to evaluate the stability of granular bodies in water flow; Particle size and water flow velocity relationship model construction module: Based on the moment balance calculation formula, the relationship between particle size and water flow velocity is constructed to predict the required particle size of the granular body under different water flow velocities; Plugging particle size calculation and field test module: using the pigment tracer test, combined with the particle size and water flow velocity relationship model, calculate the particle size of the granular body required for the i-1th and ith plugging, and implement the plugging on site; Plugging effect evaluation module: Determine whether the difference in particle size between the i-1th and i-th plugging meets the set conditions. If so, it is determined that no further plugging is required; if not, further plugging is required until the set conditions are met.

9. A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for calculating the decrease in particle size of granular material for blocking concentrated seepage channels in an earth-rock dam body as claimed in any one of claims 1 to 7.

10. A computer device comprising a processor and a memory, wherein the memory stores a computer program, and when the processor executes the computer program, the method for calculating the decrease in particle size of granular material for blocking the concentrated seepage channel of an earth-rock dam body as described in any one of claims 1 to 7 is implemented.

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