Vertical structure of closed coal storage yard area of power plant and closed coal storage yard of power plant

Abstract

The invention discloses a vertical structure of a closed coal storage yard area of a power plant and the closed coal storage yard of the power plant, and belongs to the technical field of vertical design of power plant sites. The vertical structure of the closed coal storage yard area of the power plant comprises a closed coal storage yard site, a coal retaining wall, a net rack and stand columns. A coal storage yard is arranged on the closed coal storage yard, the upper portion of the coal storage yard is closed through a net rack, the lower portion of the net rack is closed through a coal retaining wall, and stand columns and the coal retaining wall are located on the same axis and jointly form a lower portion enclosure structure of the coal storage yard. The aproll is arranged on the outer side of the coal retaining wall, drainage ditches are arranged in the field outside the aproll in a segmented mode, the lowest position of each drainage ditch is provided with a drainage pipe connected with a rainwater pipe of a road, and the problems of field ponding and scouring caused by disordered drainage of rainwater on the roof of the closed coal storage field can be effectively solved. When the closed coal storage yard is lower than the surrounding site, the height difference of the site inside and outside the closed coal storage yard is processed by increasing the height of the coal retaining wall of the closed coal storage yard, the problems of land shortage and site water accumulation are solved, and site slopes are saved.

Description

Technical Field

[0001] This invention belongs to the field of vertical design technology for power plant sites, specifically relating to a vertical structure of a closed coal storage area in a power plant and a closed coal storage area in a power plant. Background Technology

[0002] Coal storage yards are an important component of power plants. In recent years, influenced by environmental protection policies, coal storage yards in power plants have mostly adopted a grid-like enclosed structure. The roof area of ​​a single enclosed coal storage yard can reach nearly 50,000 m². 2 Since most of the rainwater from the grid roof is discharged unorganized, during the rainy season, a large amount of rainwater is discharged haphazardly, causing erosion and poor drainage of the surrounding area of ​​the coal storage yard. Furthermore, enclosed coal storage yards exist in two forms within the power plant's vertical structure: one where the yard elevation is higher than the surrounding area and situated on the same platform, and another where the yard elevation is lower than the surrounding area and situated on different platforms. In the latter case, drainage from the surrounding area will converge towards the enclosed coal storage yard area, leading to water accumulation. Additionally, the enclosed coal storage yard area requires elevation treatment through slopes or retaining walls, which occupies a certain amount of floor space. When the site is limited, this will reduce the area of ​​the enclosed coal storage yard, affecting the coal storage capacity. Therefore, when space is limited, it is urgent to solve the problem of how to handle elevation differences to avoid water accumulation while alleviating land scarcity.

[0003] The prior art, patent CN103375041A, provides a circular coal yard retaining wall, including a foundation or abutment, a retaining wall, a top ring beam, at least ten ribs, and at least two intermediate ring beams. The ribs and intermediate ring beams form a grid structure to support the retaining wall. Both the intermediate and top ring beams are provided with circumferential unbonded prestressed tendons, and the retaining wall is also provided with circumferential unbonded prestressed tendons. By setting prestressed steel bars along the circumferential direction on the circular coal yard retaining wall, the circumferential tensile force is used to counteract the pressure on the coal pile side, eliminating the need for buttress columns and solving the problems of excessive steel bar usage and floor space in the prior art. Patent CN201921549373.9 provides a rainwater and sewage separation structure for coal yard shed renovation. The structure includes a first coal sluice and a second coal sluice, respectively located on both sides of the road. The first coal sluice has a rainwater system on the side away from the road, and the second coal sluice has a closed dry coal shed on the side away from the road. The wall of the second coal sluice, near the dry coal shed, extends upward to form an extended sluice wall higher than the ground level. A rainwater ditch is formed between the extended sluice wall and the foundation of the coal retaining wall of the dry coal shed. A rainwater inlet is set at the bottom of the rainwater ditch, and a coal sluice collection port is set on the inner side of the foundation of the coal retaining wall. The coal sluice collection port is connected to the second coal sluice through a coal sluice discharge pipe. By setting an extended sluice wall higher than the ground level and a coal sluice collection port in the coal yard shed renovation, the complete separation of rainwater and sewage is achieved, with the key point being the separation of rainwater and sewage. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a vertical structure for a closed coal storage area in a power plant. The purpose of this invention is to utilize the retaining wall structure of the closed coal storage area to address the elevation difference with the surrounding site when space is limited and the area of ​​the closed coal storage area remains constant, thereby alleviating land constraints for the power plant and saving on slope treatment work. Simultaneously, drainage ditches and site slopes are appropriately installed at the outer sides of the two long sides of the closed coal storage area to effectively address the problems of rainwater accumulation and erosion caused by rainwater from the roof of the closed coal storage area to the surrounding site.

[0005] To achieve the above objectives, the present invention provides a vertical structure for a closed coal storage area in a power plant, including a closed coal storage area, a coal retaining wall, a grid frame, and columns. A coal storage yard is located on the closed coal storage area. The coal storage yard is enclosed on the upper part by a grid frame, and the lower part is enclosed by a coal retaining wall. The columns and the coal retaining wall are on the same axis, together forming the lower enclosure structure of the coal storage yard. A drainage ditch is provided on the outside of the coal retaining wall, and drainage ditches are set in sections in the area outside the drainage ditch. A drainage pipe is provided at the lowest point of each drainage ditch, and the drainage pipe is connected to the rainwater pipe of the road.

[0006] Furthermore, limit height markings are provided on the inner side of the coal retaining wall and the columns, and a safety height margin is left at the top of the coal retaining wall.

[0007] Furthermore, the area between the outer edge of the drainage ditch and the road is called the perimeter area. The perimeter area slopes towards the road with a gradient of 0.3% to 2% and is made of hardened ground.

[0008] Furthermore, the drainage ditch is set in parallel sections along the long side of the enclosed coal storage yard, combined with the inlet and outlet, and the longitudinal slope of each drainage ditch is not less than 0.2%.

[0009] Furthermore, the area between the drainage ditch and the apron is paved with a 3m to 5m wide surface, sloping towards the drainage ditch at a 0.5% to 1% angle.

[0010] Furthermore, the vertical elevation of the surrounding area is lower than the indoor elevation of the enclosed coal storage yard.

[0011] Furthermore, the vertical elevation of the surrounding site is higher than the indoor elevation of the enclosed coal storage yard, and the height of the retaining wall and the columns are increased.

[0012] Furthermore, a linear drainage channel is installed on the top of the coal retaining wall to collect rainwater from the surface of the grid structure and guide it to the drainage ditch.

[0013] Furthermore, an atomizing nozzle system is installed within the grid structure and connected to the plant's water supply network.

[0014] Furthermore, the coal retaining wall adopts a cantilevered retaining wall structure.

[0015] On the other hand, the present invention also provides a closed coal storage yard for a power plant, which adopts the vertical structure of the closed coal storage yard area of ​​the power plant described above.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: by arranging the coal retaining wall and the grid column coaxially to form an integrated enclosure structure, the two can work together to bear the structural load and save space; by setting up a drainage system and segmented drainage ditches outside the coal retaining wall and connecting them to the road rainwater system through drainage pipes, the effective collection and orderly discharge of rainwater falling on the grid structure is realized, avoiding surface erosion and water accumulation problems; when the surrounding site is at a high elevation, the coal retaining wall can be heightened to serve as a retaining wall, eliminating the need for additional retaining walls or slopes, thereby saving land, reducing project investment, and solving the problems of poor drainage and limited land area in enclosed coal storage yards under complex terrain conditions. Attached Figure Description

[0017] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely schematic to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. In the drawings: Figure 1 This is a schematic diagram of the vertical structure of the enclosed coal storage area of ​​the present invention; Figure 2 This is a cross-sectional view of the site according to Embodiment 1 of the present invention; Figure 3 This is a cross-sectional view of the site in Embodiment 2 of the present invention; The components include: 1. Enclosed coal storage yard area; 2. Surrounding area; 3. Coal retaining wall; 4. Coal storage yard; 5. Grid structure; 6. Columns; 7. Drainage ditch; 8. Area between drainage ditch and drainage ditch; 9. Drainage ditch; 10. Drainage pipe; 11. Rainwater pipe; 12. Road.

[0018] It should be noted that the accompanying drawings are not necessarily drawn to scale, but are shown only in a schematic manner without affecting the reader's understanding. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0020] It should be noted that when a component is said to be "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. In the description of this invention, it should be understood that the terms "center," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "side," "one end," "one side," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0022] The present invention will now be described in detail with reference to the accompanying drawings.

[0023] like Figures 1 to 3 As shown, the present invention discloses a vertical structure for a closed coal storage area in a power plant, comprising a closed coal storage area 1, a surrounding area 2, a coal retaining wall 3, a grid frame 5, and columns 6. A coal storage yard 4 is located on the closed coal storage area 1. The coal storage yard 4 is enclosed at the top by the grid frame 5, and surrounded on all four sides by the coal retaining wall 3. A drainage system 7 is provided on the outer side of the coal retaining wall 3. The grid frame 5 is supported by columns 6, which are on the same axis as the coal retaining wall 3. The columns 6 and the coal retaining wall 3 together form the lower enclosure structure of the coal storage yard. The coal piles inside the coal retaining wall 3 and the columns 6 do not exceed the maximum height, and a certain safety margin is left between the coal retaining wall 3 and the top. The surrounding area 2 is the area between the outer side of the drainage system 7 and the road 12. The surrounding area 2 slopes towards the road with a gradient of 0.3% to 2%, and uses a hardened surface to facilitate rainwater drainage and prevent erosion. A drainage ditch 9 is provided on the outer side of the apron 7. The drainage ditch 9 is set in sections parallel to the outside of the apron 7 along the long side of the enclosed coal storage yard and in conjunction with the entrance and exit. The longitudinal slope of each section of the drainage ditch is not less than 0.2%. This solves the problem of water accumulation and erosion of the surrounding area caused by the disorderly discharge of rainwater from the roof of the enclosed coal storage yard of the power plant. At the same time, it addresses the drainage and land use constraints caused by the vertical height difference between the enclosed coal storage yard and the surrounding area.

[0024] The integrated structure and vertical drainage scheme for enclosed coal storage areas in power plants provided in this application achieves a compact structure, orderly drainage, and adaptability to complex terrain by integrating the lower enclosure components and constructing a graded surface drainage system. Specifically, the enclosed coal storage area 1 is a hardened ground area that has been leveled and compacted, used to support the coal storage area 4 and its ancillary facilities, the specific location of which is determined based on the plant layout and coal storage capacity requirements. This area serves as the foundation of the entire enclosed system and must possess sufficient foundation bearing capacity to support the coal pile load and the structure's self-weight. Coal retaining walls 3 are set around the enclosed coal storage yard 1 to prevent coal inside from sliding or rolling outwards, ensuring operational safety. Coal retaining walls 3 can be made of reinforced concrete cantilever retaining wall structure, which has good anti-overturning and anti-sliding performance. Its height is determined comprehensively based on the maximum coal stacking height and safety margin. The grid frame 5 is a large-span spatial grid structure that covers the coal storage yard 4, realizing a fully enclosed dust prevention and suppression function, reducing wind loss and environmental pollution. The grid frame 5 is usually made of steel pipe members connected by bolted ball or welded ball joints. Truss beams or arched steel frames can be used as functionally equivalent replacement structures. By placing the columns 6 and the coal retaining wall 3 on the same axis, the stress is coordinated, structural stability is improved, and the footprint is reduced. The foundations of the columns 6 and the coal retaining wall 3 can be designed together to form a unified strip foundation or pile cap structure. By setting up a drainage ditch 7 on the outside of the coal retaining wall 3 and arranging drainage ditches 9 in sections around it, effective interception and orderly drainage of rainwater from the roof and walls are achieved, avoiding concentrated erosion that could cause ground damage or localized water accumulation. The drainage ditches 9 are connected to the rainwater pipes 11 on the road 12 through drainage pipes 10, ensuring the continuity and reliability of the drainage path. The area 8 between the drainage ditch and the drainage ditch is made of hardened ground with a slope of 0.5% to 1% towards the drainage ditch 9, which collects rainwater from the grid structure 5 when it falls randomly, reducing erosion of the ground. The drainage ditch is divided into nine parallel sections, ensuring each section has a longitudinal slope of at least 0.2%. This design achieves efficient drainage, facilitates construction, and allows for adaptation to elevation differences in different areas. It also effectively controls the ditch depth, allows for adjustments to the longitudinal slope based on the actual terrain, and improves construction flexibility and ease of maintenance. The start and end points of each section can be flexibly determined based on site conditions, typically using the interval between two adjacent inlets / outlets as two basic units. In areas with poor geological conditions or settlement sensitivity, segmentation can also effectively mitigate the risk of structural cracking caused by uneven settlement.

[0025] Optionally, the length of each drainage ditch section 9 is determined based on the longitudinal slope of the terrain and the catchment area. The ditch body can be in the form of a prefabricated U-shaped ditch, a cast-in-place rectangular ditch, or a brick-built open ditch.

[0026] The drainage apron 7 is located at the bottom outer side of the coal retaining wall 3, extending outwards close to the wall. It guides rainwater flowing down the surface of the coal retaining wall 3 away from the base of the wall quickly, preventing long-term soaking from causing foundation softening or structural damage. The drainage apron 7 can be cast in place using C20 or higher grade concrete, with a width generally between 1.0m and 1.5m. The surface is smoothed or textured to enhance durability. It is laid continuously in the longitudinal direction with a slope controlled between 2% and 5% to ensure smooth drainage. The space frame 5 and the coal retaining wall 3 respectively serve the functions of upper enclosure and lower retaining. The columns 6 support the upper structure and participate in the construction of the retaining system. The drainage apron 7 and the drainage ditch 9 form a two-stage surface drainage strategy, and the drainage pipe 10 serves as the terminal interface to complete the connection of the drainage system.

[0027] The area 8 between the apron and the drainage ditch is paved with a width of 3m to 5m and slopes towards the drainage ditch 9 at a rate of 0.5% to 1%. This serves to collect rainwater that falls randomly from the grid structure 5, reducing erosion of the ground. The 0.5% to 1% slope unidirectionally towards the drainage ditch 9 creates controllable gravity drainage conditions. Rainwater first slides from the grid structure 5 onto the apron 7 or the area 8 between the apron and the drainage ditch. Here, it accumulates and converges into a stable flow on a hardened surface with a certain width and directional slope, eventually flowing smoothly into the drainage ditch 9. This helps reduce the risk of direct erosion of the original foundation soil by rainwater and solves the technical problem of this transition area being easily eroded or forming a waterlogged zone in traditional layouts.

[0028] Preferably, a drainage pipe 10 is provided at the lowest point of each drainage ditch 9. The drainage pipe 10 is connected to the rainwater pipe 11 of the road 12 to drain the ground water in the drainage ditch 9. The drainage pipe 10 can be made of HDPE double-wall corrugated pipe, PVC-U drainage pipe or cast iron pipe. The pipe diameter is determined according to the drainage volume. One end of the drainage pipe 10 is connected to the lowest point of the drainage ditch 9, and the other end is connected to the rainwater pipe 11 pre-buried beside the road 12. The latter is part of the factory area rainwater pipe network and will eventually transport the rainwater to the factory area's main drainage system or natural water body.

[0029] Furthermore, by installing visible coal stacking height control markers on the inner side of the retaining wall and pillars, combined with the safety space reserved at the top of the wall, a dual protection mechanism is formed to prevent coal from overflowing due to excessive stacking or structural imbalance. This improves the safety of the enclosed coal storage yard during operation and enhances the standardization and operability of on-site operations, especially suitable for the frequent operation of mechanized stacker-reclaimer equipment in large power plants. The limit height marking can be achieved through weather-resistant coating spraying, embedded metal scale strips, or fixed reflective signs. Alternatively, electronic sensors integrated with luminous indicator lights can be used, automatically flashing an alarm when the coal stack approaches the limit height, thus achieving intelligent monitoring. The safety height margin provides additional space buffer on top of the limit stacking height to address the risk of local bulging or dynamic overflow of coal during stacking due to vibration, slippage, impact, or changes in the angle of repose.

[0030] As a further optimization, an atomizing nozzle system can be added inside the grid frame 5, connected to the plant's water supply network, to achieve timed or sensor-based dust suppression; a linear drainage trough can be added to the top of the coal retaining wall 3 to collect rainwater from the surface of the grid frame 5 and guide it to the drainage ditch 9.

[0031] Alternatively, a paved floor can be used to harden the ground.

[0032] Example 1 like Figure 2 As shown, in this embodiment, the vertical elevation of the surrounding site 2 is lower than the indoor elevation of the enclosed coal storage yard 1.

[0033] The coal storage yard 4 is enclosed at the top by a grid frame 5, and at the bottom by a coal retaining wall 3. A drainage system 7 is installed on the outside of the coal retaining wall 3. The columns 6 of the grid frame 5 and the coal retaining wall 3 are on the same axis, together forming the lower enclosure structure of the coal storage yard. The coal pile inside the coal retaining wall 3 and the columns 6 must not exceed the maximum height, and a certain safety height should be maintained between the coal pile and the top of the coal retaining wall 3. The coal retaining wall 3 is a reinforced concrete cantilever retaining wall.

[0034] Drainage ditch 9 is provided outside the water storage area 7. The drainage ditch 9 is set in sections along the long side of the closed coal storage yard and in conjunction with the entrance and exit, and is parallel to the outside of the water storage area 7. The longitudinal slope of each section of the drainage ditch is not less than 0.2%.

[0035] The area 8 between the drainage ditch and the apron is paved with a width of 3m to 5m and slopes towards the drainage ditch 9 at a rate of 0.5% to 1%. This helps to collect rainwater that falls randomly from the grid structure 5 and reduces the erosion of the ground.

[0036] At the lowest point of each drainage ditch 9, there is a drainage pipe 10, which is connected to the rainwater pipe 11 of the road 12 to drain the site water in the drainage ditch 9.

[0037] When the vertical elevation of the surrounding area 2 is lower than the indoor elevation of the enclosed coal storage yard 1, a positive elevation difference is formed between the two. This elevation difference can prevent external rainwater from flowing back into the coal storage area through surface runoff. It is especially suitable for plant sites with relatively flat terrain or external areas that are easily affected by rainfall, achieving a good drainage guiding effect without the need for additional water-retaining sills, slopes, or retaining walls. The lower elevation of the surrounding area 2 compared to the indoor elevation of the enclosed coal storage yard 1 creates a natural drainage potential energy gradient, reducing the risk of external rainwater seeping into the coal storage area. Combined with the continuous drainage facilities of the drainage ditch 7 and drainage channel 9, it enhances the overall waterproofing capability of the site.

[0038] Example 2 like Figure 3As shown in this embodiment, the vertical elevation of the surrounding site 2 is higher than the indoor elevation of the enclosed coal storage yard 1. The height of the retaining wall 3 and the column 6 are increased to address the elevation difference between the inside and outside of the enclosed coal storage yard 1. This saves on the slope of the surrounding site 2, solves the problems of land scarcity and site water accumulation, and can also reduce the investment in project construction to a certain extent.

[0039] The coal storage yard 4 is enclosed at the top by a grid frame 5 and at the bottom by a coal retaining wall 3. A drainage system 7 is installed on the outside of the coal retaining wall 3. The columns 6 of the grid frame 5 and the coal retaining wall 3 are on the same axis, forming the lower enclosure structure of the coal storage yard. The coal pile inside the coal retaining wall 3 and columns 6 must not exceed the maximum height, and a certain safety height must be maintained from the top of the coal retaining wall 3. The coal retaining wall essentially serves a dual purpose: providing lateral protection for the coal storage and acting as a support structure for the transition from the outdoor ground level. The coal retaining wall 3 and columns 6 are set on the same axis, forming a unified vertical enclosure interface in space, and both work together to bear the load. This allows for site elevation management without the need for a separate retaining structure, even in special terrain conditions where the surrounding site elevation is higher than the indoor elevation of the enclosed coal storage yard. It eliminates the need for additional retaining walls or slopes, saving valuable land resources in the plant area, making it suitable for power plant projects with limited land, especially for power plant renovation and expansion projects.

[0040] Drainage ditch 9 is provided outside the water storage area 7. The drainage ditch 9 is set in sections along the long side of the closed coal storage yard and in conjunction with the entrance and exit, and is parallel to the outside of the water storage area 7. The longitudinal slope of each section of the drainage ditch is not less than 0.2%.

[0041] The area 8 between the drainage ditch and the apron is paved with a width of 3m to 5m and slopes towards the drainage ditch 9 at a rate of 0.5% to 1%. This helps to collect rainwater that falls randomly from the grid structure 5 and reduces the erosion of the ground.

[0042] At the lowest point of each drainage ditch 9, there is a drainage pipe 10, which is connected to the rainwater pipe 11 of the road 12 to drain the site water in the drainage ditch 9.

[0043] Unless otherwise specified, the equipment components involved in the above embodiments are all conventional equipment components, and the structural settings, working methods or control methods involved are all conventional settings, working methods or control methods in the art unless otherwise specified.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention, as long as they do not depart from the spirit and scope of the technical solutions of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A vertical structure for a closed coal storage area in a power plant, characterized in that, It includes a closed coal storage yard site (1), a coal retaining wall (3), a grid frame (5) and columns (6); a coal storage yard (4) is set up on the closed coal storage yard (1), the upper part of the coal storage yard (4) is enclosed by a grid frame (5), and the lower part of the grid frame (5) is enclosed by a coal retaining wall (3). The columns (6) and the coal retaining wall (3) are on the same axis and together form the lower enclosure structure of the coal storage yard; a drainage ditch (7) is set up on the outside of the coal retaining wall (3), and drainage ditches (9) are set up in sections in the site outside the drainage ditch (7). A drainage pipe (10) is set up at the lowest point of each drainage ditch (9), and the drainage pipe (10) is connected to the rainwater pipe (11) of the road (12).

2. The vertical structure of the enclosed coal storage area of ​​a power plant according to claim 1, characterized in that, Limit height markings are provided on the inner side of the coal retaining wall (3) and the column (6), and a safety height margin is left at the top of the coal retaining wall (3).

3. The vertical structure of the enclosed coal storage area of ​​a power plant according to claim 1, characterized in that, The area between the outer side of the drainage (7) and the road (12) is called the perimeter area (2). The perimeter area (2) slopes towards the road (12) with a slope of 0.3% to 2% and is made of hardened ground.

4. The vertical structure of the enclosed coal storage area of ​​a power plant according to claim 1, characterized in that, The drainage ditch (9) runs along the long side of the enclosed coal storage yard. The drainage ditch (9) is set in sections parallel to the outside of the drainage ditch (7) in conjunction with the entrance and exit. The longitudinal slope of each drainage ditch is not less than 0.2%.

5. The vertical structure of the enclosed coal storage area of ​​a power plant according to claim 4, characterized in that, The area between the drainage ditch and the apron (8) is a hardened ground with a width of 3m to 5m, with a slope of 0.5% to 1% towards the drainage ditch (9).

6. The vertical structure of the enclosed coal storage area of ​​a power plant according to claim 1, characterized in that, The vertical elevation of the surrounding site (2) is lower than that of the enclosed coal storage yard (1) indoor elevation.

7. The vertical structure of the enclosed coal storage area of ​​a power plant according to claim 1, characterized in that, The vertical elevation of the surrounding site (2) is higher than that of the enclosed coal storage yard (1) and the indoor elevation. The height of the retaining wall (3) and the column (6) are increased.

8. The vertical structure of the enclosed coal storage area of ​​a power plant according to claim 1, characterized in that, A linear drainage trough is set on the top of the coal retaining wall (3) to collect rainwater on the surface of the grid frame (5) and guide it to the drainage ditch (9); an atomizing nozzle system is set inside the grid frame (5) and connected to the plant area water supply network.

9. The vertical structure of the enclosed coal storage area of ​​a power plant according to claim 1, characterized in that, The coal retaining wall (3) adopts a cantilevered retaining wall structure.

10. A closed coal storage yard for a power plant, characterized in that, The vertical structure of the enclosed coal storage area of ​​the power plant as described in any one of claims 1-9 is adopted.

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