Small sand setting structure for drainage of mining area
By setting up sand sedimentation tanks and sand-blocking weirs in the mine drainage ditch, the siltation problem caused by large slopes and long distances in the mine drainage ditch is solved, and the convenience of dredging and environmental protection requirements are met, and the construction technology is mature.
Patent Information
- Application Number
- CN202422627982.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-10-30
AI Technical Summary
The drainage ditches in the mining area have a large slope and long distance, which leads to easy accumulation of silt at the drainage terminal and difficult to clean, affecting production operation and environmental protection requirements.
A sand sinking tank and a sand-blocking weir are set up in the drainage ditch. The middle of the sand sinking tank is wider than the drainage ditch, and the sand-blocking weir is obliquely upstream. Combined with the dredging equipment, the design is flexible and the construction is convenient.
It effectively solves the problem of sand deposition and silting in long-distance drainage ditches, meets environmental protection requirements, ensures smooth drainage, facilitates production and operation, and mature construction technology.
Smart Images
Figure CN223305128U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of drainage systems and relates to a small sand settling structure used for drainage in mining areas. Background Art
[0002] Limestone is typically found in mountainous and hilly areas with large elevation differences and heavy rainfall. In recent years, with increasing environmental protection requirements, limestone mining has generated dust and sediment during the mining process, necessitating the hardening of roads and drainage facilities. In particular, drainage systems in mining areas require organized drainage, collection, and sedimentation before discharge.
[0003] The mine drainage design is divided into three parts, mainly the external flood diversion ditch, the on-site drainage ditch and the initial rainwater collection pool at the mine drainage terminal. The size of the pool is designed in accordance with environmental impact assessment and regulatory requirements.
[0004] Due to the large elevation differences between the mining area and the site, steep drainage ditch slopes, and long distances in actual mining operations, a primary rainwater collection pool was installed at the drainage terminal. This ditch was prone to silt accumulation, making it difficult to clean and resulting in poor drainage. Clearly, the conventional drainage ditch plus primary rainwater collection pool approach could not adequately meet the drainage and sand removal requirements, causing inconvenience to production operations. Utility Model Content
[0005] The purpose of the utility model is to provide a small sand settling structure for mining drainage, so as to solve the technical problem in the prior art that the drainage ditch has a large slope and a long distance, and an initial rainwater collection pool is directly set at the drainage terminal, where silt is easily accumulated in the drainage ditch and is difficult to clean.
[0006] The small-scale sand settling structure used for mine drainage includes a drainage ditch, a sand settling tank and a sand weir. The sand settling tank is arranged at a certain interval along the drainage ditch, and each sand settling tank is provided with a sand weir. The middle width of the sand settling tank is greater than the width of the drainage ditch. The sand weir is arranged in the middle of the sand settling tank. The top height of the sand weir is lower than the top height of the sand settling tank. The slope of the sand weir faces the upstream direction of the water flow. The mouth of the sand settling tank is larger than the bottom of the sand settling tank. The side walls of the sand settling tank are inclined and provided with guard walls. The left and right sides of the sand weir extend to the guard walls.
[0007] Preferably, the slope of the bottom of the grit chamber is smaller than the slope of the bottom of the drainage ditch, the bottom of the grit chamber is divided into an upstream part and a downstream part by the sand retaining weir, the bottom of the grit chamber is paved with rubble concrete, and the thickness of the rubble concrete in the upstream part is greater than the thickness of the rubble concrete in the downstream part.
[0008] Preferably, the sand-blocking weir includes a main body and a foundation, the foundation of the sand-blocking weir is located below the bottom of the sand settling tank, the bottom of the main body is arranged on the foundation, and the main body passes through the bottom of the sand settling tank.
[0009] Preferably, the sedimentation tank is divided into a middle area, a front area and a rear area. The width of the middle area is greater than the width of the drainage ditch. The front area connects the drainage ditch 1 located upstream and the front end of the middle area. The rear area connects the drainage ditch 2 located downstream and the rear end of the middle area. The sand weir is located at the rear of the middle area.
[0010] Preferably, the drainage ditch is a mortared flagstone trapezoidal drainage ditch, which includes a mortared flagstone layer arranged along the bottom and inner side of the inner side of the trapezoidal drainage ditch body and a concrete cushion layer arranged under the bottom of the trapezoidal drainage ditch body.
[0011] Preferably, the drainage ditch is a concrete trapezoidal drainage ditch, which includes a plain concrete layer arranged along the bottom and inner side of the inner side of the trapezoidal drainage ditch body and a second concrete cushion layer arranged below the bottom of the trapezoidal drainage ditch body.
[0012] This utility model has the following advantages: the grit chamber and weir installed on the drainage ditch can be adjusted in length and width in conjunction with silt removal equipment, effectively solving the problem of grit removal in drainage ditches with steep slopes and long distances, facilitating production and operation, and meeting environmental protection requirements. Furthermore, the solution is aesthetically pleasing, has mature construction technology, and has a wide range of applications.
[0013] Grit chambers and weirs are arranged at intervals in the middle of long-distance ditches, which facilitates the desilting of long-distance drainage ditches, effectively solves the problem of drainage ditch congestion caused by sediment, and meets drainage and environmental protection requirements. The size and position of grit chambers and weirs can be adjusted according to the actual situation on site, which is very flexible. Combining grit chambers, weirs and drainage ditches with synchronous design and construction is more beautiful. The construction technology of grit chambers, weirs and drainage ditches is mature, and the scheme is easy to construct. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 The utility model is a top view of a small sand settling structure used for drainage in mining areas.
[0015] Figure 2 for Figure 1 A cross-sectional view of the structure shown along the AA direction.
[0016] Figure 3 for Figure 1 Cross-sectional view along line BB of the structure shown.
[0017] Figure 4 for Figure 1Cross-sectional view along CC direction of the structure shown.
[0018] Figure 5 for Figure 1 Cross-sectional view along DD direction of the structure shown.
[0019] The figure numbers in the accompanying drawings are as follows: 1. Sedimentation tank, 11. Side wall, 12. Upstream part, 13. Downstream part, 14. Middle area, 15. Front area, 16. Rear area, 2. Sand weir, 21. Main body, 22. Foundation, 3. Drainage ditch 1, 31. Mortared stone layer, 32. Concrete cushion layer 1, 4. Drainage ditch 2, 41. Plain concrete layer, 42. Concrete cushion layer 2. DETAILED DESCRIPTION
[0020] The following is a further detailed description of the specific implementation methods of the present invention by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.
[0021] like Figure 1-Figure 5 As shown, the utility model provides a small-scale sand settling structure for drainage in mining areas, including a drainage ditch, a sand settling tank 1 and a sand weir 2. The sand settling tank 1 is arranged at a certain interval along the drainage ditch, and the sand settling tank 1 is provided with the sand weir 2. The middle width of the sand settling tank 1 is greater than the width of the drainage ditch, and the sand weir 2 is arranged in the middle of the sand settling tank 1. The top height of the sand weir 2 is lower than the top height of the sand settling tank 1. The slope of the sand weir 2 faces the upstream direction of the water flow, the mouth of the sand settling tank 1 is larger than the bottom of the sand settling tank 1, the side wall 11 of the sand settling tank 1 is inclined and provided with a guard wall, and the left and right sides of the sand weir 2 extend to the guard wall.
[0022] The bottom slope of the grit chamber 1 is less than that of the drainage ditch. The bottom of the grit chamber 1 is divided into an upstream portion 12 and a downstream portion 13 by the sand retaining weir 2. The bottom of the grit chamber 1 is paved with rubble concrete, with the rubble concrete thickness of the upstream portion 12 being greater than that of the downstream portion 13. The retaining wall of the grit chamber 1 is a rubble concrete structure, such as C30 rubble concrete. In this embodiment, the retaining wall of the grit chamber 1 is 30 cm thick, with the rubble concrete thickness of the upstream portion 12 being 40 cm and the rubble concrete thickness of the downstream portion 13 being 30 cm.
[0023] The sand weir 2 includes a main body 21 and a foundation 22. The foundation 22 of the sand weir 2 is located below the bottom of the sand trap 1. The bottom of the main body 21 is located on the foundation 22, and the main body 21 extends out of the bottom of the sand trap 1. The sand trap 1 and the sand weir 2 are designed and constructed in conjunction with the drainage ditch. The sand trap 1 and the sand weir 2 are designed to be widened and deepened. The length and width of the sand trap 1 and the sand weir 2 can be adjusted in conjunction with dredging equipment. The size and position of the sand trap 1 and the sand weir 2 can also be adjusted based on actual site conditions, providing great flexibility.
[0024] The grit chamber 1 is divided into a middle area 14, a front area 15 and a rear area 16. The width of the middle area 14 is greater than the width of the drainage ditch. The front area 15 connects the drainage ditch 1 3 located upstream and the front end of the middle area 14. The rear area 16 connects the drainage ditch 2 4 located downstream and the rear end of the middle area 14. The sand weir 2 is located at the rear of the middle area 14.
[0025] The drainage ditch includes a drainage ditch 1 (3) located upstream of the grit chamber 1 and a drainage ditch 2 (4) located downstream of the grit chamber 1. Drainage ditch 1 (3) and drainage ditch 2 (4) can have the same or different structures. The drainage ditch includes two structures: a mortared stone trapezoidal drainage ditch and a concrete trapezoidal drainage ditch. The mortared stone trapezoidal drainage ditch includes a mortared stone layer 31 disposed along the bottom and inner side of the trapezoidal drainage ditch body 21 and a concrete cushion layer 1 (32) disposed below the bottom of the trapezoidal drainage ditch body 21. The mortared stone layer 31 is made of M20 mortared stone, and the concrete cushion layer 1 (32) is made of C20 concrete. The concrete trapezoidal drainage ditch includes a plain concrete layer 41 disposed along the bottom and inner side of the trapezoidal drainage ditch body 21 and a concrete cushion layer 2 (42) disposed below the bottom of the trapezoidal drainage ditch body 21. The plain concrete layer 41 is made of C25 plain concrete, and the concrete cushion layer 2 (42) is made of C20 concrete. The thickness of the mortared stone layer 31 is greater than that of the plain concrete layer 41. In this embodiment, the upstream drainage ditch 1 3 adopts a mortared stone trapezoidal drainage ditch, and the mortared stone layer 31 reaches 30 cm. The downstream drainage ditch 2 4 adopts a concrete trapezoidal drainage ditch, and the thickness of the plain concrete layer 41 reaches 15 cm.
[0026] The construction process for this solution includes: first, designing the mine's drainage ditches and initial rainwater collection tanks based on the terrain and requirements. Following this, several central grit chambers (1) and weirs (2) are designed based on the drainage ditch layout and terrain. These chambers are then constructed simultaneously with the drainage ditches according to the design plan. Following their completion, the initial rainwater collection tanks are constructed. The grit chambers (1) and weirs (2) are spaced apart in the middle of long ditches to facilitate desilting, effectively addressing silt congestion and meeting drainage and environmental protection requirements. The mature construction technology for the grit chambers (1), weirs (2), and drainage ditches makes this solution easy to implement.
[0027] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the inventive concept and technical solution of the present invention, or the inventive concept and technical solution are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.
Claims
1. A small sand settling structure for mining drainage, characterized by: The invention comprises a drainage ditch, a grit chamber (1) and a sand weir (2). The grit chamber (1) is arranged at a certain interval along the drainage ditch. The grit chamber (1) is provided with the sand weir (2). The width of the middle part of the grit chamber (1) is greater than the width of the drainage ditch. The sand weir (2) is arranged in the middle part of the grit chamber (1). The top height of the sand weir (2) is lower than the top height of the grit chamber (1). The inclined surface of the sand weir (2) faces the upstream direction of the water flow. The mouth of the grit chamber (1) is greater than the bottom of the grit chamber (1). The side wall (11) of the grit chamber (1) is inclined and provided with a protective wall. The left and right sides of the sand weir (2) extend to the protective wall.
2. The small sand settling structure for mine drainage according to claim 1, characterized in that: The slope of the bottom of the grit chamber (1) is smaller than the slope of the bottom of the drainage ditch. The bottom of the grit chamber (1) is divided into an upstream part (12) and a downstream part (13) by the sand weir (2). The bottom of the grit chamber (1) is paved with rubble concrete. The thickness of the rubble concrete of the upstream part (12) is greater than the thickness of the rubble concrete of the downstream part (13).
3. The small sand settling structure for mine drainage according to claim 1, characterized in that: The sand-blocking weir (2) comprises a main body (21) and a foundation (22); the foundation (22) of the sand-blocking weir (2) is located below the bottom of the sand-setting tank (1); the bottom of the main body (21) is arranged on the foundation (22); and the main body (21) passes through the bottom of the sand-setting tank (1).
4. The small sand settling structure for mine drainage according to claim 2, characterized in that: The sedimentation tank (1) is divided into a middle area (14), a front area (15) and a rear area (16). The width of the middle area (14) is greater than the width of the drainage ditch. The front area (15) connects the drainage ditch 1 (3) located upstream and the front end of the middle area (14). The rear area (16) connects the drainage ditch 2 (4) located downstream and the rear end of the middle area (14). The sand weir (2) is located at the rear of the middle area (14).
5. The small sand settling structure for mine drainage according to claim 1, characterized in that: The drainage ditch is a mortar-laid slate trapezoidal drainage ditch, which includes a mortar-laid slate layer (31) arranged along the bottom and inner side of the inner side of the trapezoidal drainage ditch body (21) and a concrete cushion layer (32) arranged below the bottom of the trapezoidal drainage ditch body (21).
6. The small sand settling structure for mine drainage according to claim 1, characterized in that: The drainage ditch is a concrete trapezoidal drainage ditch, which includes a plain concrete layer (41) arranged along the bottom and inner side of the inner side of the trapezoidal drainage ditch body (21) and a second concrete cushion layer (42) arranged below the bottom of the trapezoidal drainage ditch body (21).