A steep slope water and soil resource collecting and recycling device and method

Abstract

This invention belongs to the field of slope maintenance technology and discloses a device and method for collecting and reusing water and soil resources on steep slopes. The device includes a storage section, a diversion section, and a resource utilization section. The storage section includes a collection box and a diversion channel, with the diversion channel connected to the collection box via a connecting pipe. The diversion section includes a guide plate and a conveying pipe. A guide cavity is provided on the guide plate, which is connected to the top of the conveying pipe, and the bottom of the conveying pipe is located inside the diversion channel. The resource utilization section includes a spraying pump and a water pump. The spraying pump has an inlet pipe at its input end and a spray head at its output end. The water pump has a hose at its input end and a spray head at its output end. The method includes burying the collection box in the soil at the toe of the slope, diverting and collecting water and soil and allowing them to naturally stratify, then extracting clean water for irrigation and spraying mud to replenish the slope surface. This achieves the simultaneous collection and recycling of water and soil resources on steep slopes, preventing snowballing soil erosion at its source.

Description

Technical Field

[0001] This invention relates to the field of slope maintenance technology, and in particular to a device and method for collecting and reusing water and soil resources on steep slopes. Background Technology

[0002] Slopes are an important component of the Earth's surface morphology, widely existing in slope areas formed by human engineering activities such as highways, railways, water conservancy projects, and mining in mountainous areas, as well as in natural mountain slopes. Steep slopes with large surface gradients are highly susceptible to severe soil erosion under the combined action of rainwater and runoff. This is especially true in arid and semi-arid regions, where total rainfall is low and primarily consists of acute, concentrated rainfall events with high intensity. The instantaneous runoff has a strong capacity to strip and transport topsoil from the slope, making soil erosion problems even more pronounced. Therefore, the collection and utilization of soil and water resources on steep slopes is of significant practical importance.

[0003] Current steep slope protection devices typically focus only on water collection and irrigation, such as collecting slope runoff through rainwater collection boxes and water storage bags for later irrigation. However, they cannot simultaneously collect water and soil lost from the slope, nor can they utilize the soil resources lost with the runoff. This results in the inability to replenish valuable topsoil resources and a continuous reduction in the soil matrix needed for slope vegetation growth. Therefore, there is an urgent need for a device that can simultaneously collect and reuse lost water and soil to meet the maintenance needs of steep slopes. Summary of the Invention

[0004] The present invention aims to provide a device and method for collecting and reusing soil and water resources on steep slopes, so as to solve the problem that current protective devices cannot simultaneously collect and reuse lost soil and water.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A device for collecting and reusing water and soil resources on steep slopes includes: The storage unit, located at the bottom of the steep slope, is used to collect water and soil. The storage unit includes a collection box and a diversion trough, and the diversion trough is connected to the collection box through a connecting pipe. The diversion section is set on the steep slope and is used to divert water and soil. The diversion section includes a guide plate and a delivery pipe. The delivery pipe is set on the guide plate and the guide plate is provided with a guide cavity. The guide cavity is connected to the top of the delivery pipe and the bottom of the delivery pipe is located in the diversion trough. The resource utilization section is located on the collection box. The resource utilization section includes a hydroseeding pump and a water pump. The hydroseeding pump has a feed pipe at its input end, and the bottom opening of the feed pipe is located in the mud layer inside the collection box. The hydroseeding pump has a spray head at its output end. The water pump has a hose at its input end, and the bottom end of the hose is located in the clear water layer inside the collection box. The water pump has a water spray head at its output end. Both the spray head and the water spray head face the steep slope.

[0006] Furthermore, the collection box is equipped with a power supply unit, which includes a mounting bracket and a solar photovoltaic panel and a storage battery mounted on the mounting bracket. The solar photovoltaic panel is electrically connected to the storage battery, and the storage battery is electrically connected to the spraying pump and the water pump respectively.

[0007] Furthermore, a buffer box is installed on the conveying pipe, with drainage ports on both sides of the buffer box and a connector on the top of the buffer box.

[0008] Furthermore, multiple sets of diversion sections are arranged from top to bottom along the steep slope. In two adjacent sets of diversion sections, the bottom end of the upper set of conveying pipes is connected to the connector of the lower set of buffer boxes, and a fixing component is provided on the guide plate.

[0009] Furthermore, a float plate is provided at the bottom of the hose, the water inlet of the hose passes through the float plate and is lower than the float plate, and several support columns are provided on the bottom surface of the float plate.

[0010] Furthermore, a cover is provided at the top opening of the collection box, and a heat insulation layer is provided on the top surface of the cover.

[0011] Furthermore, a support crossbar is provided at the top opening of the collection box, and the support crossbar contacts the bottom surface of the cover plate to support the cover plate.

[0012] Furthermore, the bottom surface of the cavity inside the collection box is an inclined plane, and the feed inlet at the bottom of the feed pipe is located at the lowest point of the inclined plane, maintaining a distance from the lowest point of the inclined plane.

[0013] This invention also provides a method for collecting and reusing water and soil resources on steep slopes, comprising the following steps: S1: Bury the collection box in the soil at the foot of the steep slope, so that the top opening of the collection box is lower than or level with the ground surface. Set the diversion channel at the foot of the steep slope and set up a multi-layer diversion section on the slope. Guide the runoff generated on the slope and the sediment it carries into the collection box through the diversion section, so that the runoff and sediment will naturally stratify in the collection box, forming an upper clear water layer and a lower mud layer. S2: Start the water pump through the controller, draw water from the clear water layer through the water pump and the hose connected to its input end, and spray the water onto the steep slope surface through the spray head at the output end of the water pump. S3: Start the hydroseeding pump through the controller, extract the mud from the mud layer through the hydroseeding pump and the feed pipe connected to its input end, and spray the mud onto the steep slope surface through the spray nozzle at the output end of the hydroseeding pump.

[0014] The principles and beneficial effects of the technical solution are as follows: 1. The slope runoff and the sediment it carries are simultaneously guided to the collection box through the diversion section. After natural stratification in the collection box, clean water is directly sprayed onto the steep slope for irrigation by a water pump, realizing the recycling of collected water resources. It is especially suitable for arid and semi-arid areas with scarce water resources. The mud is sprayed back onto the steep slope by a hydroseeding pump to solve the problem of soil infertility caused by water and soil erosion on steep slopes in arid areas. 2. The diversion section adopts multi-layer horizontal strip-shaped diversion plates laid layer by layer along the slope, dividing the long and steep slope into several independent water and soil collection sections. Each layer of diversion plates independently cuts off the runoff in that section and directly guides it into the delivery pipe to the bottom of the slope, avoiding the runoff from accumulating along the slope and the continuous increase in flow and scouring force. This blocks the "snowball" water and soil loss from the source. At the same time, the slope area between adjacent diversion plates can be planted with vegetation normally. The diversion plate laying area is small and the cost is low, and it does not affect the slope vegetation maintenance. 3. The collection box is buried in the soil at the foot of the steep slope. The soil's heat insulation properties reduce the temperature fluctuation of the water in the collection box, reduce evaporation loss in the high-temperature environment of arid areas, and at the same time allow the runoff in the diversion channel to flow smoothly into the collection box under the action of gravity. The cover plate can protect the collection box and prevent surface debris from falling into the box. 4. The power supply unit uses solar photovoltaic power generation and is equipped with batteries, making it particularly suitable for arid regions. The entire system can operate independently in the field without grid coverage. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a steep slope water and soil resource collection and reuse device according to the present invention; Figure 2 This is a schematic diagram of the storage section in a steep slope water and soil resource collection and reuse device of the present invention; Figure 3 This is a schematic diagram of the structure of a steep slope water and soil resource collection and reuse device with a diversion section according to the present invention; Figure 4 This is a schematic diagram of the water pump in a steep slope water and soil resource collection and reuse device of the present invention; Figure 5 This is a schematic diagram of the installation of a steep slope water and soil resource collection and reuse device according to the present invention on a steep slope. Figure 6 This is a cross-sectional view of a steep slope water and soil resource collection and reuse device of the present invention laid on a steep slope. The corresponding labels in the attached diagram are named as follows: 1. Storage section; 101. Collection box; 102. Drainage channel; 103. Cover plate; 104. Support crossbar; 2. Drainage section; 201. Guide plate; 202. Conveying pipe; 203. Drainage cavity; 204. Buffer box; 205. Drainage port; 206. Connector; 207. Fixing component; 3. Resource utilization section; 4. Hydroseeding pump; 401. Feed pipe; 402. Spraying head; 5. Water pump; 501. Hose; 502. Spray head; 503. Float; 504. Support column; 6. Power supply section. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments: like Figures 1-6 As shown, a device for collecting and reusing water and soil resources on steep slopes includes: Storage unit 1 includes a collection box 101 and a diversion channel 102. The collection box 101 is a rectangular box welded from steel plates. The collection box 101 is buried in the soil at the toe of a steep slope. After the collection box 101 is buried in the soil, the area around the box is backfilled and compacted to ensure a tight bond between the box and the surrounding soil. The insulation properties of the soil are used to reduce temperature fluctuations in the water inside the box and reduce evaporation. The top of the collection box 101 is open, and its inner cavity is used to collect lost water and soil. Through natural sedimentation, the lost water and soil are... The collection box 101 is divided into a lower mud layer and an upper clear water layer; the diversion channel 102 is made of stainless steel plate or engineering plastic, and is a long strip channel with a V-shaped or U-shaped cross section. A grid plate can be installed on its top surface to intercept larger debris such as leaves and grass stems to prevent blockage. The diversion channel 102 is inclined from both ends to the middle and is set at the foot of the slope to facilitate the flow of water and soil mixture in the channel. The lowest point of the diversion channel 102 is connected to the inner cavity of the collection box 101 through a connecting pipe. The diversion section 2, located on the steep slope, is used to divert water and soil. The diversion section 2 includes a guide plate 201 and a conveying pipe 202. The guide plate 201 is a horizontal strip-shaped plate made of engineering plastic, fiberglass, or stainless steel. A baffle is installed on the guide plate 201 to intercept the runoff flowing down the slope. The cavity between the baffle and the guide plate 201 forms a diversion cavity 203. The intercepted runoff enters the diversion cavity 203. The diversion cavity 203 is V-shaped or U-shaped. Its bottom end (i.e., the end closest to the bottom of the slope) is connected to the top end of the conveying pipe 202. The inner wall of the conveying pipe 202 is smooth to reduce the adhesion and deposition of mud and sand on the pipe wall. It is arranged along the steep slope. The bottom end of the conveying pipe 202 extends downward to the foot of the slope and into the diversion channel 102, so that the water and soil mixture in the pipe flows downward by gravity and enters the diversion channel 102.

[0017] The resource utilization unit 3 includes a hydroseeding pump 4 and a water pump 5, both of which are fixedly installed on the top of the collection box 101. The hydroseeding pump 4 adopts a wide-channel wear-resistant centrifugal pump (mud pump) in existing soil hydroseeding equipment, which is suitable for conveying high-concentration mud containing solid particles. The hydroseeding pump 4 is installed on the top of the collection box 101 through a mounting base. The input end of the hydroseeding pump 4 is provided with a feed pipe 401. The upper end of the feed pipe 401 is connected to the input interface of the hydroseeding pump 4, and the lower end extends downward into the inner cavity of the collection box 101. The lower end of the feed pipe 401 is the feed inlet, which is located near the bottom of the inner cavity of the collection box 101, that is, in the mud layer inside the collection box 101. The output end of the hydroseeding pump 4 is provided with a spray head 402. The spray head 402 is a fan-shaped nozzle or an adjustable spray nozzle, which is installed on the mounting base and connected to the output interface of the hydroseeding pump 4 through a pipeline. It faces the steep slope and is used to spray mud onto the steep slope for soil replenishment. The water pump 5 is a centrifugal pump used to transport clean water, and its installation method is the same as that of the hydroseeding pump 4. The input end of the water pump 5 is equipped with a hose 501, which is a rubber hose or a PVC hose. The bottom end of the hose 501 is located in the clean water layer inside the collection tank 101. The output end of the water pump 5 is equipped with a spray head 502, which is a rocker arm type spray head or a rotary spray head. It is connected to the output interface of the water pump 5 through a pipeline. The spray head 502 is installed on the mounting base of the water pump 5, and its spraying direction is towards the steep slope surface, used to spray water onto the steep slope surface to irrigate vegetation. Both the hydroseeding pump 4 and the water pump 5 are controlled by a controller (not shown in the figure). The controller is a programmable logic controller (PLC) or a single-chip microcomputer control system. The controller automatically controls the start and stop of the hydroseeding pump 4 and the water pump 5 according to the preset control logic. The controller can also communicate with a remote terminal through a wireless communication module to realize remote monitoring and control.

[0018] In this embodiment, a power supply unit 6 is also included, which is located above or near the collection box 101. The power supply unit 6 includes a mounting bracket, a solar photovoltaic panel, and a storage battery. The mounting bracket is fixed to the top of the collection box 101 or independently buried in the ground next to the collection box 101. Its height and tilt angle are adjusted according to the local latitude to ensure that the solar photovoltaic panel obtains the optimal solar incidence angle. The solar photovoltaic panel is a monocrystalline silicon or polycrystalline silicon photovoltaic panel, and its power is determined according to the total power of the spraying pump 4 and the water pump 5 as well as the local sunshine conditions. It is fixed to the mounting bracket with bolts. The output end of the solar photovoltaic panel is electrically connected to the charging input end of the storage battery through a photovoltaic cable. The storage battery is a lead-acid battery or a lithium battery, and its capacity is determined according to the power generation of the solar photovoltaic panel and the power consumption of the load. The storage battery is installed on the top of the mounting bracket through a waterproof enclosure. The output end of the storage battery is electrically connected to the power input ends of the spraying pump 4 and the water pump 5 through cables, respectively.

[0019] In this embodiment, a buffer box 204 is provided on the conveying pipe 202. The buffer box 204 is located on the path of the conveying pipe 202 and serves as a connection node of the conveying pipe 202. Both sides of the buffer box 204 are provided with drainage ports 205. The water-soil mixture in the guide cavity 203 can enter the buffer box 204 through the drainage ports 205, and then enter the conveying pipe 202. The top of the buffer box 204 is provided with a connector 206, which is a pipe joint used to connect to the bottom end of the previous set of conveying pipes 202. The volume of the buffer box 204 is larger than the internal volume of the conveying pipe 202. When the water flow in the upper conveying pipe 202 carries mud and sand into the conveying pipe 202 at high speed, the buffer box 204 can reduce the impact kinetic energy of the water flow, so that the water-soil mixture of this stage can smoothly enter the conveying pipe 202 through the drainage ports 205.

[0020] In this embodiment, multiple sets of diversion sections 2 are arranged from top to bottom along the steep slope. In two adjacent sets of diversion sections 2, the bottom end of the upper set of conveying pipes 202 is connected to the connector 206 of the lower set of buffer boxes 204. A fixing member 207 is provided on the guide plate 201. The fixing member 207 is an anchor bolt, expansion bolt or ground anchor. The fixing member 207 passes through the mounting hole on the guide plate 201 and is anchored into the slope soil, so as to firmly fix the guide plate 201 to the steep slope. By laying multiple layers of horizontal strip guide plates 201 along the slope layer by layer, the long steep slope is divided into several independent water and soil collection sections. Each layer of guide plate 201 independently cuts off the runoff in the section and directly guides it into the conveying pipe 202 to transport it to the bottom of the slope. This avoids the runoff from being superimposed along the slope and the flow rate and scouring force from increasing continuously. At the same time, it reduces the laying area and reduces the cost of use. Vegetation can also be planted between each guide plate 201 without affecting normal plant maintenance.

[0021] In this embodiment, a float plate 503 is provided at the bottom end of the hose 501. The float plate 503 is a flat float, rectangular or circular in shape, made of closed-cell foam plastic or hollow plastic sheet, with a density less than water, so it can float on the water surface and has sufficient buoyancy to support the weight of the hose 501. A through hole is opened in the center of the float plate 503 for the hose 501 to pass through. The hose 501 passes through the through hole, so that the water inlet at the bottom end of the hose 501 is located below the float plate 503 and below the lower surface of the float plate 503. When the float plate 503 floats on the surface of the clear water layer, the water inlet of the hose 501 is always below the water surface, thereby pumping water. Several vertically downward extending support columns 504 are provided on the bottom surface of the float plate 503. The lower end is hemispherical or flat to prevent excessive sinking when in contact with the mud layer. When the water level of the clear water layer in the collection tank 101 drops, the float 503 drops synchronously with the water surface. When the lower end of the support column 504 contacts the upper surface of the mud layer, the support column 504 supports the float 503, preventing the float 503 from sinking further into the mud layer. This maintains the distance between the float 503 and the mud layer, ensuring that the inlet of the hose 501 is always kept at a distance from the mud layer, preventing the suction of mud from clogging the hose 501 and the water pump 5. At the same time, this prevents the water pump 5 from pumping out all the water, keeping the mud layer moist and maintaining good fluidity for easy extraction, avoiding complete drying and hardening, which would make it impossible to extract.

[0022] In this embodiment, a cover plate 103 is provided at the top opening of the collection box 101, and a heat insulation layer is provided on the top surface of the cover plate 103. The cover plate 103 is a rectangular plate composed of two layers. The lower layer is a steel plate or a rigid plastic plate, which serves as a structural support. The upper layer is a heat insulation layer made of heat insulation material (such as polyurethane foam board, extruded board or rock wool board). The cover plate 103 can not only protect the top opening of the collection box 101 to prevent people or animals from stepping into the gap, but also provide heat insulation to reduce the evaporation of moisture inside the box.

[0023] In this embodiment, a support crossbar 104 is provided at the top opening of the collection box 101. The support crossbar 104 contacts the bottom surface of the cover plate 103 and is used to support the cover plate 103. The support crossbar 104 is a metal square tube, which provides central support for the cover plate 103, preventing the cover plate 103 from collapsing or deforming when soil accumulates on top or when people step on it, thereby further improving the safety of the device.

[0024] In this embodiment, the bottom surface of the inner cavity of the collection box 101 is an inclined surface, and the lowest point of the inclined surface is located on one side of the inner cavity of the collection box 101. This is used to allow the settled mud to automatically collect to the lowest point under the action of gravity. The feed port at the bottom end of the feed pipe 401 is located directly above the lowest point of the inclined surface and maintains a distance of 3 to 8 cm from the lowest point of the inclined surface. This allows the feed port to draw up the concentrated mud collected at the lowest point of the inclined surface, while avoiding the feed port from directly contacting the bottom surface or extending into the bottom coarse particle sediment layer and causing blockage.

[0025] Device operation process: During rainfall, runoff and the sediment it carries flow down the slope. When the runoff reaches the guide plate 201, it is blocked and enters the guide cavity 203. After being collected in the guide cavity 203, it enters the delivery pipe 202. The delivery pipe 202 transports the water-soil mixture downwards to the diversion channel 102, and then through the connecting pipe into the collection box 101 for storage. The runoff and sediment settle in the collection box 101, naturally forming an upper clear water layer and a lower mud layer.

[0026] When the vegetation on the steep slope needs irrigation, the water pump 5 is started via the controller or manual switch. The water pump 5 operates, creating a negative pressure in the hose 501, which draws clean water from the clear water layer through the inlet of the hose 501. After being pressurized by the water pump 5, the water is sprayed from the sprinkler head 502 onto the steep slope surface to irrigate the vegetation.

[0027] When the mud slurry in the collection box 101 accumulates to a certain thickness, the hydroseeding pump 4 is started via the controller or manual switch. The hydroseeding pump 4 operates, creating negative pressure in the feed pipe 401. This draws the mud slurry collected at the lowest point of the slope into the feed inlet of the feed pipe 401. After being pressurized by the hydroseeding pump 4, the slurry is sprayed from the spray nozzle 402 onto the steep slope, replenishing the soil matrix for vegetation growth. After the mud slurry spraying is complete, the water pump 5 can be started to spray water, wetting the vegetation. This dilutes the mud covering the vegetation, causing it to fall back onto the steep slope under gravity, further enhancing the soil replenishment effect and preventing the mud slurry from covering the vegetation pores, thus not affecting vegetation growth.

[0028] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific technical solutions or characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A device for collecting and reusing water and soil resources on steep slopes, characterized in that, include: Storage unit (1), which is set at the bottom of the steep slope, is used to collect water and soil. The storage unit (1) includes a collection box (101) and a diversion channel (102). The diversion channel (102) is connected to the collection box (101) through a connecting pipe. The diversion section (2) is set on the steep slope and is used to divert water and soil. The diversion section (2) includes a guide plate (201) and a conveying pipe (202). The conveying pipe (202) is set on the guide plate (201). The guide plate (201) is provided with a guide cavity (203). The guide cavity (203) is connected to the top end of the conveying pipe (202). The bottom end of the conveying pipe (202) is located in the diversion channel (102). The resource utilization unit (3) is installed on the collection box (101). The resource utilization unit (3) includes a hydroseeding pump (4) and a water pump (5). The hydroseeding pump (4) has a feed pipe (401) at its input end. The bottom opening of the feed pipe (401) is located in the mud layer inside the collection box (101). The hydroseeding pump (4) has a spray head (402) at its output end. The water pump (5) has a hose (501) at its input end. The bottom of the hose (501) is located in the clear water layer inside the collection box (101). The water pump (5) has a spray head (502) at its output end. Both the spray head (402) and the spray head (502) face the steep slope.

2. The device for collecting and reusing water and soil resources on steep slopes according to claim 1, characterized in that: The collection box (101) is provided with a power supply unit (6), which includes a mounting bracket and a solar photovoltaic panel and a storage battery mounted on the mounting bracket. The solar photovoltaic panel is electrically connected to the storage battery, and the storage battery is electrically connected to the spraying pump (4) and the water pump (5) respectively.

3. The device for collecting and reusing water and soil resources on steep slopes according to claim 1, characterized in that: A buffer box (204) is provided on the delivery pipe (202), and a drain port (205) is provided on both sides of the buffer box (204). A connector (206) is provided on the top of the buffer box (204).

4. The device for collecting and reusing water and soil resources on steep slopes according to claim 3, characterized in that: The diversion section (2) is provided in multiple sets from top to bottom along the steep slope. In two adjacent sets of diversion sections (2), the bottom end of the upper set of conveying pipe (202) is connected to the connector (206) of the lower set of buffer box (204). The guide plate (201) is provided with a fixing part (207).

5. The device for collecting and reusing water and soil resources on steep slopes according to claim 1, characterized in that: A float plate (503) is provided at the bottom end of the hose (501). The water inlet of the hose (501) passes through the float plate (503) and is lower than the float plate (503). Several support columns (504) are provided on the bottom surface of the float plate (503).

6. The device for collecting and reusing water and soil resources on steep slopes according to claim 1, characterized in that: The top opening of the collection box (101) is provided with a cover plate (103), and the top surface of the cover plate (103) is provided with a heat insulation layer.

7. A device for collecting and reusing water and soil resources on steep slopes according to claim 6, characterized in that: A support crossbar (104) is provided at the top opening of the collection box (101). The support crossbar (104) contacts the bottom surface of the cover plate (103) and is used to support the cover plate (103).

8. The device for collecting and reusing water and soil resources on steep slopes according to claim 1, characterized in that: The bottom surface of the cavity inside the collection box (101) is an inclined surface, and the feed inlet at the bottom end of the feed pipe (401) is located at the lowest point of the inclined surface and maintains a distance from the lowest point of the inclined surface.

9. A method for collecting and reusing water and soil resources on steep slopes, characterized in that, Includes the following steps: S1: Bury the collection box (101) in the soil at the foot of the steep slope, so that the top opening of the collection box (101) is lower than or level with the ground surface. Set the diversion channel (102) at the foot of the steep slope and set up a multi-layer diversion section (2) on the slope. Guide the runoff generated on the slope surface and the sediment it carries to the collection box (101) through the diversion section (2), so that the runoff and sediment are naturally layered in the collection box (101) to form an upper clear water layer and a lower mud layer. S2: Start the water pump (5) through the controller, and draw water from the clear water layer through the water pump (5) and the hose (501) connected to its input end, and spray the water onto the steep slope surface through the spray head (502) at the output end of the water pump (5). S3: Start the spraying pump (4) through the controller, extract the mud from the mud layer through the spraying pump (4) and the feed pipe (401) connected to its input end, and spray the mud onto the steep slope surface through the spraying head (402) at the output end of the spraying pump (4).

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