Physical simulation test device and simulation method for development and evolution of debris flow disasters

Abstract

The invention provides a physical simulation test device and method for development and evolution of debris flow disasters. The physical simulation test device comprises a material source supply device used for providing materials, a material source circulation device used for material flowing and a test monitoring device, and the material source supply device comprises a movable grid-shaped belt conveyor, a water source supply device and a material source supply box; the material source circulation device comprises a circulation device and a stacking device. According to the physical simulation test device and the simulation method for development and evolution of debris flow disasters, disaster formation mechanisms and disaster movement processes of debris flow disasters composed of different material sources and under different mountain terrains can be simulated.

Description

Technical Field

[0001] The invention belongs to the technical field of debris flow, and in particular to a physical simulation test device and a simulation method for the development and evolution of debris flow disasters. Background Art

[0002] Debris flow is a sudden geological disaster unique to mountainous areas. There are a large number of loose solid materials in a critical state of motion in the source area above the debris flow. Under heavy rain or sufficient water conditions, debris flow disasters often occur, posing a serious threat to the lives, property and engineering construction of mountain personnel. Therefore, studying the development and evolution of debris flow disasters under different source compositions and different mountain terrain conditions provides core theoretical support for debris flow prevention and control.

[0003] Traditional debris flow disaster research methods rely on field investigations, hydrological and meteorological analysis, monitoring technology and numerical simulation, with very few physical model tests. In addition, current debris flow disaster simulations are often based on physical simulations, which have great limitations. How to combine physical simulations with numerical simulations is also a technical problem that needs to be solved urgently. Summary of the invention

[0004] The purpose of the present invention is to provide a physical simulation test device and simulation method for the development and evolution of debris flow disasters, which solves the technical problem of how to simulate the disaster formation mechanism and disaster movement process of debris flow disasters under different material source compositions and different mountain terrains.

[0005] The physical test device comprises a material source supply device, a material source circulation device and a test monitoring device.

[0006] The material supply device includes a movable grid belt conveyor, a water supply device, and a material supply box. The material circulation device includes a circulation device and a stacking device. The test monitoring device includes a high-speed camera, a multifunctional signal dynamic acquisition instrument, a pressure sensing device, a passive soil pressure signal sensor, a vibration signal sensor, a host computer, and a stainless steel frame.

[0007] The movable grid belt conveyor consists of a conveyor support block at the top and a soil and rock chute at the bottom. The conveyor support block is built on the material supply box to support the upper weight of the conveyor and increase stability. The soil and rock chute is placed above the lower conveyor to evenly spread the soil and rock in the grid of the conveyor belt, ensuring that the soil and rock are evenly dumped into the material supply box.

[0008] The water source replenishment device consists of a stainless steel water pipe bracket, a bottom water source switch, a top shower and an electronic flow counter. The stainless steel water pipe bracket can be disassembled and moved, and has a portable function. When studying mountainous terrains with different slopes, the height can also be adjusted. The top shower simulates rainfall and is used to simulate water source replenishment in actual disasters. The electronic flow counter is used to control the ratio of fluid and solid in debris flow disasters, so as to reveal the laws of debris flow disasters under different source components.

[0009] The material supply box is composed of a transparent acrylic enclosure, a transparent acrylic baffle, a hydraulic rod retractor, a high-strength aluminum alloy hinge and a material supply pad. The material supply box uses a transparent acrylic enclosure to facilitate observation of the material composition and state of the material in the material supply box. Among them, the upper transparent acrylic enclosure and the transparent acrylic baffle are connected in a concave shape through high-strength aluminum alloy hinges, so that the hydraulic rod retractor can be normally retracted and used. The switch of the transparent acrylic baffle is controlled by controlling the hydraulic rod retractor, so that the debris flow can flow smoothly. The bottom of the material supply box is inclined to facilitate the flow of debris flow under the action of gravity. The material supply pad is composed of a cement pad fixed at the bottom and a solid wood pad. The solid wood pad is increased or decreased according to the similar ratio height of the actual terrain to achieve the purpose of adjusting the material supply box. The material supply box and the circulation channel are connected by four high-strength aluminum alloy hinges to achieve the effect of adjusting the angle.

[0010] The circulation device is composed of a transparent acrylic plate, a hydraulic jack at the bottom, and a cement platform. The bottom of the transparent acrylic plate is coated with real stone paint, and the coating density is determined according to the friction in the actual terrain, which is used to fully simulate the actual terrain. The transparent acrylic plates on both sides are convenient for observing the movement process and shape of debris flows. The hydraulic jack at the bottom is used to adjust the inclination angle of the circulation area to simulate the angle of the real terrain. The cement platform provides support, and the width of the platform is greater than the width of the circulation channel to facilitate close observation.

[0011] The stacking device consists of a detachable cement pile, a stacking trough and a replaceable flexible protective net. The detachable cement pile is a one-time cast concrete structure that can be pulled out from both sides for replacement to simulate different forms of blocking and protection effects. Three rows of buckles are designed on both sides of the stacking trough to fix the flexible protective net. The replaceable flexible protective net can be laid at different positions in the stacking trough to test the protective effect of the flexible protective net at different positions.

[0012] High-speed cameras are used to record the entire process of debris flow disaster movement.

[0013] The multifunctional signal dynamic acquisition instrument is used to collect the vibration frequency at different positions during the movement of debris flow, to analyze the movement law of debris flow disasters, and to provide a basis for the prediction of debris flow disasters.

[0014] The pressure sensing equipment is used to monitor the changes in pressure at the bottom of the material supply box under different material composition.

[0015] The sensors are divided into vibration signal sensors and passive soil pressure signal sensors, which are used to connect to the multifunctional signal dynamic collector and pressure sensing equipment respectively for information collection.

[0016] The host computer is used to store the data recorded by the pressure sensor equipment, signal acquisition instrument and high-speed camera.

[0017] Two movable beams are set on the stainless steel frame. The beams are used to stick high-speed cameras. The beams can be adjusted according to monitoring needs to meet monitoring requirements.

[0018] A flexible adjustment structure is provided inside the long cylindrical structure;

[0019] The flexible adjustment structure includes a bellows and a plurality of telescopic cylinders respectively arranged on both sides of the bellows. The free ends of the plurality of telescopic cylinders are movably abutted against the outer sides of the bellows to form a multi-point molding structure. One end of the bellows is docked at the opening position of the box-type structure, and the other end is arranged close to the stacking device. The plurality of telescopic cylinders are positioned on both sides of the long cylindrical structure, and a long strip opening is arranged at the upper end of the bellows.

[0020] When the bellows is inside the long cylindrical structure, the size of the long cylindrical structure can be adaptively adjusted, but the principle is that the top of the bellows is aligned with the opening position of the box-type structure, and the debris flow in the experimental device accurately enters the bellows.

[0021] A physical test method for simulating the development and evolution of debris flow disasters in the whole process, specifically comprising the following steps:

[0022] Step S1: obtaining a corresponding monitoring data set M by testing the monitoring device;

[0023] Step S2: Design a three-dimensional model of the test monitoring device, import it into the Massflow software, preliminarily set the parameter set A, input it into the Massflow software, and perform the simulation process;

[0024] Step S3: Obtain the simulation data set B in step S2 and compare it with the monitoring data set M;

[0025] Step S4: Introduce correction parameter C to correct the simulation data set B to obtain the corrected data set N, so that the error between N and M is less than 5%;

[0026] Step S5: adjusting the test parameters in step S1, performing the debris flow test again, and obtaining a new monitoring data set M1;

[0027] Step S6: Repeat steps S2-S3 to obtain a new simulation data set B1, and compare it with M1;

[0028] Step S7: By using the correction parameter C, determine whether the error between the new correction data set N and M1 is less than 5%. If it is less than 5%, it means that the correction parameter C is effective; if it is greater than 5%, obtain a new correction parameter C1, and repeat the above experimental and numerical simulation process;

[0029] Step S8: obtaining correction parameters C2, C3, ..., Cn in sequence; when Cmax-Cmin<1.5, calculating the average value thereof to obtain Cp as the correction parameter, and indicating that the mathematical model of the numerical simulation is effective;

[0030] When Cmax-Cmin>1.5, and it indicates that the mathematical model of numerical simulation is invalid, replace the mathematical model of simulation and repeat the above simulation test.

[0031] A handheld 3D coordinate measuring machine is used to construct a real terrain 3D model, which is then imported into the Massflow software for actual numerical simulation to verify the numerical simulation effect and ultimately obtain relatively accurate simulation experimental data.

[0032] The beneficial effects of the present invention are as follows:

[0033] (1) In this scheme, a grid belt conveyor, a water source replenishment device and a material supply box are designed. Different materials can be placed in the material supply box, and water can be added to the material supply box to form a debris flow state, which is helpful for studying the development and evolution of debris flow disasters under different material source compositions;

[0034] (2) The design has a circulation device that works in conjunction with the accumulation device to adjust the inclination angle of the long cylindrical structure, which helps to explore the development and evolution of debris flow disasters under different mountain terrain conditions;

[0035] (3) A test monitoring device is installed to facilitate the analysis of the formation mechanism and movement process of debris flow disasters;

[0036] (4) A flexible adjustment structure is provided, which can simulate the development and evolution of debris flow disasters for slopes with a certain degree of curvature and different curvatures. This is of great significance for exploring whether the curved movement of debris flow has the effect of blocking debris flow and the subsequent protection against debris flow;

[0037] In addition, the free ends of some telescopic cylinders can also be directly extended into the interior of the bellows to act as a barrier column, which helps to simulate the barrier effect of the barrier column on debris flow.

[0038] (5) Numerical simulation is introduced in this plan. Through specific experimental data, the mathematical model and correction parameters of the relevant numerical simulation are obtained, which provides a relatively accurate reference basis for subsequent experimental research under complex conditions and helps to ensure the safety of subsequent debris flows. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of the physical experiment device in Example 1 of the present invention.

[0040] Figure 2 It is a structural schematic diagram of the flexible adjustment structure in Example 2, Example 3 and Example 4 of the present invention.

[0041] Among them, the reference numerals are: 1, grid belt conveyor; 101, conveyor support block; 102, soil and rock trough; 2, water source replenishment device; 201, stainless steel water pipe bracket; 202, bottom water source switch; 203, top shower; 204, electronic flow counter; 3, material source supply box; 301, acrylic enclosure; 302, acrylic baffle; 303, hydraulic rod retractor; 304, high-strength aluminum alloy hinge; 305, material source pad; 3051, cement pad; 3052, solid wood pad; 4, circulation device; 40 1. Transparent acrylic plate; 402. Hydraulic jack; 403. Cement ladder; 404. Bellows; 405. Telescopic cylinder; 406. Long opening; 5. Stacking device; 501. Cement pile; 502. Flexible protective net; 503. Flexible protective net; 504. Three rows of buckles; 6. High-speed camera; 7. Multifunctional signal dynamic collector; 8. Pressure sensing equipment; 901. Vibration signal sensor; 902. Passive soil pressure signal sensor; 10. Host computer; 11. Stainless steel frame; 111. Movable beam. DETAILED DESCRIPTION

[0042] In order to more clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0043] Example 1

[0044] See also Figure 1 A physical simulation test device and simulation method for the development and evolution of debris flow disasters, including a material supply device for providing materials, a material flow device for material flow, and a test monitoring device. The material supply device includes a movable grid belt conveyor 1, a water source replenishment device 2, and a material supply box 3;

[0045] The source circulation device includes a circulation device 4 and a stacking device 5 .

[0046] The grid belt conveyor 1 includes an inclined conveyor belt mechanism, a conveyor support block 101 and a soil and rock chute 102 respectively fixed at the upper and lower ends of the conveyor belt mechanism; the conveyor support block 101 is built on the material supply box 3 to support the upper weight of the conveyor, and the soil and rock chute 102 is placed above the lower end of the conveyor belt mechanism.

[0047] The water source replenishment device 2 includes a top shower 203, a stainless steel water pipe bracket 201 connected to the top shower 203 at one end, and a bottom water source switch 202 connected to the other end of the stainless steel water pipe bracket 201. An electronic flow counter 204 is arranged on the stainless steel water pipe bracket 201, and the top shower 203 is arranged above the source supply box 3.

[0048] The material supply box 3 includes a box structure formed by a plurality of acrylic panels 301, an opening arranged on one side of the box structure, a transparent acrylic baffle 302 located at the opening, and a hydraulic rod retractor 303 hinged to the inner side of the transparent acrylic baffle 302. One end of the transparent acrylic baffle 302 is hingedly connected to the opening position by a high-strength aluminum alloy hinge 304.

[0049] A plurality of material source pads 305 are arranged at the bottom end of the box-type structure. The material source pads 305 include cement pads 3051 and solid wood pads 3052 arranged above the cement pads 3051 .

[0050] The circulation device 4 includes a long cylindrical structure composed of a plurality of transparent acrylic plates 401 , a hydraulic jack 402 arranged at the bottom of the long cylindrical structure, and a cement step 403 supported at the bottom end of the hydraulic jack 402 . The bottom of the transparent acrylic plate 401 is coated with real stone paint.

[0051] The stacking device 5 includes a stacking trough 502, detachable cement retaining piles 501 and a replaceable flexible protective net 503 respectively arranged at both ends of the stacking trough 502; three rows of buckles 504 are respectively arranged on both sides of the stacking trough 502 for fixing the flexible protective net 503, and the stacking trough 502 is arranged at the bottom end of the long cylindrical structure.

[0052] The test monitoring device includes a stainless steel frame 11 arranged above the stacking tank 502, a high-speed camera 6 fixed on the top of the stainless steel frame 11, a multifunctional signal dynamic acquisition instrument 7 and a pressure sensing device 8 arranged on the ground, and the multifunctional signal dynamic acquisition instrument 7, the pressure sensing device 8 and the high-speed camera 6 are all connected to the host computer 10;

[0053] The multifunctional signal dynamic collector 7 is connected to the passive soil pressure signal sensor 902 through wire 1, and the passive soil pressure signal sensor 902 is fixed on the outside of the source supply box 3. The pressure sensing device 8 is connected to the vibration signal sensor 901 through wire 2, and the vibration signal sensor 901 is fixed on the bottom end of the long cylindrical structure.

[0054] A physical test method for simulating the development and evolution of debris flow disasters in the whole process, specifically comprising the following steps:

[0055] Step S1: obtaining a corresponding monitoring data set M by testing the monitoring device;

[0056] Step S2: Design a three-dimensional model of the test monitoring device, import it into the Massflow software, preliminarily set the parameter set A, input it into the Massflow software, and perform the simulation process;

[0057] Step S3: Obtain the simulation data set B in step S2 and compare it with the monitoring data set M;

[0058] Step S4: Introduce correction parameter C to correct the simulation data set B to obtain the corrected data set N, so that the error between N and M is less than 5%;

[0059] Step S5: adjusting the test parameters in step S1, performing the debris flow test again, and obtaining a new monitoring data set M1;

[0060] Step S6: Repeat steps S2-S3 to obtain a new simulation data set B1, and compare it with M1;

[0061] Step S7: By using the correction parameter C, determine whether the error between the new correction data set N and M1 is less than 5%. If it is less than 5%, it means that the correction parameter C is effective; if it is greater than 5%, obtain a new correction parameter C1, and repeat the above experimental and numerical simulation process;

[0062] Step S8: obtaining correction parameters C2, C3, ..., Cn in sequence; when Cmax-Cmin<1.5, calculating the average value thereof to obtain Cp as the correction parameter, and indicating that the mathematical model of the numerical simulation is effective;

[0063] When Cmax-Cmin>1.5, and it indicates that the mathematical model of numerical simulation is invalid, replace the mathematical model of simulation and repeat the above simulation test.

[0064] A handheld 3D coordinate measuring machine is used to construct a real terrain 3D model, which is then imported into the Massflow software for actual numerical simulation to verify the numerical simulation effect and ultimately obtain relatively accurate simulation experimental data.

[0065] The specific working process of the device of the present invention is as follows:

[0066] In actual engineering, the depth of the valley in the debris flow area and the height of the source area are different. The source conditions and water source conditions of the debris flow are also different. Debris flows are divided into mud flows, debris flows, and water-rock flows. By investigating the characteristics of debris flows in the actual area, relevant data on the generation of debris flow disasters are obtained and physical tests are conducted. According to the data of the source area, circulation area, and accumulation area in the investigation and the composition of the source, the height of the source supply box 3 is adjusted according to the similarity ratio. The height is adjusted by the source pad 305, and the inclination of the circulation area is adjusted by adjusting the hydraulic jack 402.

[0067] Fix the vibration signal sensor on the transparent acrylic plate 401. The number and position of the vibration signal sensor are determined according to the test requirements. Place the passive earth pressure sensor 902 at the bottom of the material supply box 3, and fix and waterproof the sensor. Connect the host computer 10 with the high-speed camera 6, the multifunctional signal dynamic acquisition instrument 7, and the pressure sensor 8 to debug the equipment. After debugging the equipment, replenish the material source, operate the grid belt conveyor 1, and pour the designed weight of test soil and rock into the soil and rock trough 102 according to the test requirements. Turn on the bottom water source switch 202 in the water source replenishment device 2, and adjust the composition of the material source according to the requirements.

[0068] After the replenishment is completed, the hydraulic rod retractor 303 is started to quickly lift the transparent acrylic baffle 302, and the debris flow rushes down, and the host computer is used to record the relevant test data.

[0069] According to the test requirements, the cement piles 501 and the flexible protection net 502 at the stacking device are adjusted. When the protection test is not needed, the cement piles 501 are pulled out and inserted into the stacking trough without cement piles; the flexible protection net is fixed in the stacking trough at different positions according to the design.

[0070] Example 2

[0071] See also Figure 2 , a flexible adjustment structure is provided inside the long cylindrical structure;

[0072] The flexible adjustment structure includes a bellows 404 and a plurality of telescopic cylinders 405 respectively arranged on both sides of the bellows. The free ends of the plurality of telescopic cylinders 405 are movably abutted against the outer side of the bellows 404 to form a multi-point forming structure. One end of the bellows 404 is butted against the opening position of the box-type structure, and the other end thereof is arranged close to the stacking device. The plurality of telescopic cylinders 405 are positioned on both sides of the long cylindrical structure, and a long strip opening 406 is arranged at the upper end of the bellows 404.

[0073] By moving different telescopic cylinders 405 , the two sides of the bellows 404 are limited, so that different positions of the bellows 404 are at different curvatures, thereby realizing the simulation process of slopes with different curvatures.

[0074] Example 3

[0075] A support plate is provided on the outer side of the free end of the telescopic cylinder 405, so that the free end of part of the telescopic cylinder 405 can directly extend into the interior of the bellows 404, acting as a barrier column, which helps to simulate the barrier effect of the barrier column on mud and rock flow, and the support plate is limitedly contacted with the outer side of the bellows 404; at this time, the camera is located at the inner top of the bellows 404, which is convenient for observation; a long opening 406 is provided at the top of the bellows 404 to facilitate observation by the camera.

[0076] Example 4

[0077] On the basis of Example 2 and Example 3, a plurality of filter plates are fixed on the inner side of the bellows 404, and the apertures of the plurality of filter plates decrease successively from top to bottom, so as to simulate the development and evolution of debris flow under filtering conditions; at the same time, a spray is arranged above the long cylindrical structure, and the spray water can fall directly into the bellows 404.

[0078] Technical features not described in the present invention can be achieved through or by adopting existing technologies and will not be described in detail here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A physical simulation test device for the development and evolution of debris flow disasters, characterized in that: It comprises a material source supply device for providing materials, a material source circulation device for material flow, and a test monitoring device, wherein the material source supply device comprises a movable grid belt conveyor (1), a water source replenishment device (2), and a material source supply box (3); The source circulation device comprises a circulation device (4) and a stacking device (5).

2. A physical simulation test device for the development and evolution of debris flow disasters according to claim 1, characterized in that: The grid belt conveyor (1) comprises an inclined conveyor belt mechanism, a conveyor support block (101) and a soil and rock trough (102) respectively fixed to the upper and lower ends of the conveyor belt mechanism; the conveyor support block (101) is built on the material source supply box (3) to support the upper weight of the conveyor, and the soil and rock trough (102) is placed above the lower end of the conveyor belt mechanism.

3. A physical simulation test device for the development and evolution of debris flow disasters according to claim 1, characterized in that: The water source replenishment device (2) comprises a top shower (203), a stainless steel water pipe support (201) connected to the top shower (203) at one end, and a bottom water source switch (202) connected to the other end of the stainless steel water pipe support (201); an electronic flow counter (204) is arranged on the stainless steel water pipe support (201); and the top shower (203) is arranged above the material source replenishment box (3).

4. A physical simulation test device for the development and evolution of debris flow disasters according to claim 1, characterized in that: The material supply box (3) comprises a box structure formed by a plurality of acrylic panels (301), an opening arranged on one side of the box structure, a transparent acrylic baffle (302) located at the opening, and a hydraulic rod retractor (303) hinged to the inner side of the transparent acrylic baffle (302), one end of the transparent acrylic baffle (302) being hingedly connected to the opening position via a high-strength aluminum alloy hinge (304); A plurality of material source pads (305) are arranged at the bottom end of the box-type structure, and the material source pads (305) include cement pads (3051) and solid wood pads (3052) arranged above the cement pads (3051).

5. The physical simulation test device for the development and evolution of debris flow disaster according to claim 1 is characterized in that: The circulation device (4) comprises a long cylindrical structure composed of a plurality of transparent acrylic plates (401), a hydraulic jack (402) arranged at the bottom of the long cylindrical structure, and a cement step (403) supported at the bottom end of the hydraulic jack (402), and the bottom of the transparent acrylic plate (401) is coated with real stone paint.

6. A physical simulation test device for the development and evolution of debris flow disasters according to claim 1, characterized in that: The stacking device (5) comprises a stacking trough (502), detachable cement stop piles (501) and a replaceable flexible protective net (503) respectively arranged at both ends of the stacking trough (502); three rows of buckles (504) are respectively arranged on both sides of the stacking trough (502) for fixing the flexible protective net (503); the stacking trough (502) is arranged at the bottom end of the long cylindrical structure.

7. The physical simulation test device for the development and evolution of debris flow disasters according to claim 1 is characterized in that: The test monitoring device comprises a stainless steel frame (11) arranged above the stacking tank (502), the high-speed camera (6) fixed to the top of the stainless steel frame (11), a multifunctional signal dynamic acquisition instrument (7) and a pressure sensing device (8) arranged on the ground, wherein the multifunctional signal dynamic acquisition instrument (7), the pressure sensing device (8) and the high-speed camera (6) are all connected to a host computer (10); The multifunctional signal dynamic acquisition instrument (7) is connected to a passive soil pressure signal sensor (902) via a wire 1, and the passive soil pressure signal sensor (902) is fixed on the outside of the material supply box (3). The pressure sensing device (8) is connected to a vibration signal sensor (901) via a wire 2, and the vibration signal sensor (901) is fixed on the bottom end of the long cylindrical structure.

8. The physical simulation test device for the development and evolution of debris flow disasters according to claim 5 is characterized in that: A flexible adjustment structure is provided inside the long cylindrical structure; The flexible adjustment structure comprises a bellows (404) and a plurality of telescopic cylinders (405) respectively arranged on both sides of the bellows (404); the free ends of the plurality of telescopic cylinders (405) are movably abutted against the outer sides of the bellows (404) to form a multi-point forming structure; one end of the bellows (404) is butted against an opening position of the box-type structure, and the other end thereof is arranged close to a stacking device; the plurality of telescopic cylinders (405) are positioned on both sides of the long cylindrical structure; and a long strip opening (406) is arranged at the upper end of the bellows (404).

9. A physical simulation method for the development and evolution of debris flow disasters, using a physical simulation test device for the development and evolution of debris flow disasters as claimed in any one of claims 1 to 8, characterized in that: The specific steps include: Step S1: obtaining a corresponding monitoring data set M by testing the monitoring device; Step S2: Design a three-dimensional model of the test monitoring device, import it into the Massflow software, preliminarily set the parameter set A, input it into the Massflow software, and perform the simulation process; Step S3: Obtain the simulation data set B in step S2 and compare it with the monitoring data set M; Step S4: Introduce correction parameter C to correct the simulation data set B to obtain the corrected data set N, so that the error between N and M is less than 5%; Step S5: adjusting the test parameters in step S1, performing the debris flow test again, and obtaining a new monitoring data set M1; Step S6: Repeat steps S2-S3 to obtain a new simulation data set B1, and compare it with M1; Step S7: By using the correction parameter C, determine whether the error between the new correction data set N and M1 is less than 5%. If it is less than 5%, it means that the correction parameter C is effective; if it is greater than 5%, obtain a new correction parameter C1, and repeat the above experimental and numerical simulation process; Step S8: obtaining correction parameters C2, C3, ..., Cn in sequence; when Cmax-Cmin<1.5, calculating the average value thereof to obtain Cp as the correction parameter, and indicating that the mathematical model of the numerical simulation is effective; When Cmax-Cmin>1.5, and it indicates that the mathematical model of numerical simulation is invalid, replace the mathematical model of simulation and repeat the above simulation test.

10. A physical simulation method for the development and evolution of debris flow disasters according to claim 9, characterized in that: A handheld 3D coordinate measuring machine is used to construct a real terrain 3D model, which is then imported into the Massflow software for actual numerical simulation to verify the numerical simulation effect and ultimately obtain relatively accurate simulation experimental data.

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