Outer flood interception ditch structure for mine remediation and treatment engineering

Abstract

The utility model belongs to the technical field of mine restoration, and particularly relates to an outer flood interception ditch structure for mine restoration and treatment engineering, which comprises a ditch body, the ditch body comprises a ditch bottom, a first ditch wall and a second ditch wall, the first ditch wall is arranged at one end of the ditch bottom close to a mine closure field, and the second ditch wall is arranged at one end of the ditch bottom far away from the mine closure field; the slope surface, close to the upstream side, of the ditch body is a fresh bedrock surface; the ditch bottom and the first ditch wall are both of a reinforced concrete structure, and the second ditch wall is of a water permeable brick masonry structure. The slope surface, close to the upstream side, of the ditch body is excavated to the fresh bedrock surface, and the long-term stability and safety of the ditch body are ensured by utilizing the characteristics that the fresh bedrock surface is not affected by weathering and has higher strength and stability; the ditch bottom and the first ditch wall of the ditch body are of a reinforced concrete structure, the second ditch wall is of a permeable brick masonry structure, the stability and durability of the ditch body are guaranteed, meanwhile, slope surface flowing water can be smoothly drained into the ditch body through the second ditch wall, and water accumulation is effectively prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of mine restoration, and in particular relates to an external flood interception ditch structure used in mine restoration and management projects. Background Art

[0002] Numerous abandoned mining sites remain. Due to crude and inefficient mining methods and processes, the resulting slag, waste rock, and slag soil are often stored in disorderly, exposed areas within mountains and river valleys. Over time, weathering and leaching have severely polluted the regional water and soil environment. Current risk management and remediation solutions, whether in-situ storage or ex-situ centralized landfill, prioritize clean and polluted water diversion to reduce the influx of external water into contaminated sites. The sewage diversion system can be divided into the inner field drainage ditch and the outer interception ditch around the field. Many abandoned mine restoration projects are mostly located in mountainous areas, which brings many difficulties to the construction of the interception ditch. The inner field drainage ditch can be designed during the site closure process, and the construction is relatively convenient; while the outer interception ditch around the field needs to intercept and drain the passing water outside the site, and is mostly arranged on the mountain. It is necessary to carve out the ditch body and construction surface in the solid rock. To meet the construction requirements, the construction surface usually needs to be wider than the ditch body. To meet the design of the drainage capacity of the project, the top surface of the ditch wall needs to be lower than the original mountain slope line, which greatly increases the difficulty and amount of trench excavation engineering, and the cost of this part of the sub-project will increase accordingly; at the same time, in the process of intercepting and draining slope water flow through the outer interception ditch, the passing water often carries a large amount of slope debris into the ditch. Over time, a large amount of debris accumulates in the ditch, resulting in a reduction in the drainage capacity of the drainage ditch or even the loss of its drainage function. Utility Model Content

[0003] In order to overcome the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide an external flood diversion ditch structure for mine restoration and management projects, which is not only convenient to construct, with less construction work and reduced construction difficulty, but also more efficient and longer-lasting in intercepting and draining water.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is an external flood diversion ditch structure for mine restoration and management projects, including a ditch body, the ditch body including a ditch bottom, a first ditch wall and a second ditch wall, the first ditch wall being arranged at one end of the ditch bottom close to the mine closure, and the second ditch wall being arranged at the other end of the ditch bottom away from the mine closure; the slope surface close to the water-facing side of the ditch body is a fresh bedrock surface; the ditch bottom and the first ditch wall are both reinforced concrete structures, and the second ditch wall is a permeable brick masonry structure.

[0005] As one of the implementation modes, the width of the fresh bedrock surface is at least twice the width of the trench body.

[0006] As one of the implementation modes, the trench bottom extends from below the second trench wall toward the waterfront side to the fresh bedrock surface.

[0007] As one of the implementation modes, the second trench wall, the trench bottom and the fresh bedrock surface form a trench, and the trench is backfilled with crushed stones generated during the trench excavation construction process.

[0008] As one of the implementation modes, the backfill height of the crushed stone is half of the height of the second trench wall.

[0009] As one of the embodiments, the top surface of the groove bottom is tilted downward from the second groove wall to the first groove wall.

[0010] As one of the implementation modes, the slope of the top surface of the ditch bottom is 20-30%.

[0011] As one of the implementation modes, the top surfaces of the first ditch wall and the second ditch wall are higher than the original mountain slope line.

[0012] As one embodiment, the height of the second groove wall is greater than the height of the first groove wall.

[0013] As one of the implementation modes, the planted reinforcement in the first trench wall and the planted reinforcement in the trench bottom are connected as a whole.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The utility model excavates the slope of the water-facing side of the ditch body to the fresh bedrock surface, taking advantage of the fact that the fresh bedrock surface is not affected by weathering and has higher strength and stability, thereby ensuring the long-term stability and safety of the ditch body and reducing the construction workload;

[0016] (2) The bottom of the ditch and the first ditch wall on the backwater side of the ditch body of the utility model adopt a reinforced concrete structure, and the second ditch wall on the frontwater side adopts a permeable brick masonry structure to ensure the stability and durability of the ditch body. At the same time, the slope water can be smoothly discharged into the ditch body through the second ditch wall, effectively preventing water accumulation;

[0017] (3) The utility model backfills the gravel generated during the trench excavation in the trench formed by the second trench wall, the trench bottom and the fresh bedrock surface. This not only absorbs the extra gravel generated during the trench excavation, thus avoiding waste of resources and additional processing costs, but also the gravel can filter the intercepted surface water to prevent clogging. At the same time, the gravel and the second trench wall can cooperate to block debris carried down the slope by the water flow to avoid clogging the trench.

[0018] (4) The top surface of the ditch bottom of the utility model is inclined downward from the second ditch wall to the first ditch wall. Water entering the ditch body through the second ditch wall will naturally gather downward along the inclined ditch bottom, which helps to accelerate drainage and improve drainage efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of an external flood interception ditch structure for a mine restoration and management project provided by an embodiment of the present utility model;

[0021] In the figure: 1. Mine closure boundary; 2. Original mountain slope line; 3. Fresh bedrock surface; 4. Peripheral water flow direction; 5. Trench bottom; 6. First ditch wall; 7. Second ditch wall; 8. Gravel; 9. Embedded reinforcement. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features; and in the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0025] like Figure 1As shown, this embodiment provides an external flood interception ditch structure for mine restoration and management projects, including a ditch body, the ditch body including a ditch bottom 5, a first ditch wall 6, and a second ditch wall 7. The first ditch wall 6 is arranged at the end of the ditch bottom 5 close to the mine enclosure, and the second ditch wall 7 is arranged at the end of the ditch bottom 5 away from the mine enclosure; the slope surface close to the water-facing side of the ditch body is a fresh bedrock surface 3; the ditch bottom 5 and the first ditch wall 6 are both reinforced concrete structures, and the second ditch wall 7 is a permeable brick masonry structure. In this embodiment, the slope surface close to the water-facing side of the ditch body is excavated to the fresh bedrock surface 3, and the fresh bedrock surface 3 is not affected by weathering and has higher strength and stability, thereby ensuring the long-term stability and safety of the ditch body and reducing the amount of construction work. The ditch bottom 5 and the first ditch wall 6 on the backwater side of the ditch body are reinforced concrete structures, and the second ditch wall 7 on the water-facing side is a permeable brick masonry structure, ensuring the stability and durability of the ditch body. At the same time, the slope water can be smoothly discharged into the ditch body through the second ditch wall 7, effectively preventing water accumulation.

[0026] Among them, the reinforced concrete structure is a structure constructed using steel bars and concrete as the main building materials; the permeable brick masonry structure is a structure constructed using permeable masonry building materials. In order to ensure the permeability of the second ditch wall 7, the inside of the second ditch wall 7 of this embodiment does not require a cement mortar cover.

[0027] Optimizing the above embodiment, the width of the fresh bedrock surface 3 is at least twice the width of the trench body. During trench construction, this embodiment widens the trench body upward along the mountain slope on the waterfront side by at least two additional trench widths. The severely weathered surface rock layers near the waterfront slope are removed and excavated to the fresh bedrock surface 3, thereby enhancing the stability and bearing capacity of the waterfront side of the trench body and ensuring long-term stable operation of the trench body.

[0028] Furthermore, the trench bottom 5 extends from the lower side of the second trench wall 7 to the water-facing side to the fresh bedrock surface 3. Figure 1 As shown, the second trench wall 7 of this embodiment is set on the trench bottom 5, which extends to the fresh bedrock surface 3. It can effectively guide the peripheral water flowing down the slope into the trench body, preventing the peripheral water from seeping into the enclosure from below the trench body. During the construction of the trench bottom 5, it is necessary to connect with the construction of the second trench wall 7. Specifically, the second trench wall 7 is half-embedded in the trench bottom 5 to enhance the connectivity and integrity of the second trench wall 7 and the trench bottom 5.

[0029] In one embodiment, the second trench wall 7, the trench bottom 5, and the fresh bedrock surface 3 form a trench, and the trench is backfilled with crushed stone 8 generated during the trench excavation. In this embodiment, the trench formed by the second trench wall 7, the trench bottom 5, and the fresh bedrock surface 3 is backfilled with crushed stone 8 generated during the trench excavation. This not only absorbs the extra crushed stone generated during trench excavation, thus avoiding waste of resources and additional processing costs, but also the crushed stone 8 can filter intercepted surface water to prevent clogging. At the same time, the crushed stone 8 cooperates with the second trench wall 7 to block debris carried down the slope by the water flow, thereby preventing clogging of the trench.

[0030] To optimize the above embodiment, the backfill height of the gravel 8 is half of the height of the second trench wall 7 to ensure that the gravel backfill area has sufficient thickness and stability to exert its filtering and blocking effects.

[0031] In one embodiment, the top surface of the trench bottom 5 is tilted downward from the second trench wall 7 to the first trench wall 6. In this embodiment, since the top surface of the trench bottom 5 is tilted downward from the second trench wall 7 to the first trench wall 6, water entering the trench body through the second trench wall 7 will naturally flow downward along the tilted trench bottom 5 and converge into the trench formed by the first trench wall 6 and the trench bottom 5, which helps to accelerate drainage and improve drainage efficiency.

[0032] The above embodiment is optimized, and the slope of the top surface of the ditch bottom 5 is 20-30%, which can ensure the drainage efficiency and avoid affecting the stability and safety of the ditch body.

[0033] Since the groove between the second ditch wall 7 and the fresh bedrock surface 3 can effectively guide the water flowing outside the slope into the ditch body, the top surfaces of the first ditch wall and the second ditch wall in this embodiment can be higher than the original mountain slope line, reducing the excavation depth of the ditch body, thereby greatly reducing the construction workload.

[0034] In this embodiment, the height of the second ditch wall 7 is greater than that of the first ditch wall 6. By increasing the height of the second ditch wall 7, water flow can be more effectively blocked, thereby improving the flood control and drainage capabilities of the ditch body.

[0035] Furthermore, the rebar 9 in the first trench wall 6 is connected to the rebar 9 in the trench bottom 5 as a whole. Figure 1 As shown, the first ditch wall 6 and the ditch bottom 5 are both made of reinforced concrete structure and are both provided with embedded steel bars 9. By connecting the embedded steel bars 9 in the first ditch wall 6 and the embedded steel bars 9 in the ditch bottom 5 into a whole, the integrity and stability of the ditch body can be enhanced, ensuring that when subjected to external forces such as water erosion, the first ditch wall 6 and the ditch bottom 5 can be subjected to force together as a whole, preventing structural separation or damage due to external forces.

[0036] In this embodiment, the trench bottom 5 is appropriately reinforced according to the rock properties and bearing capacity of the rock strata exposed at the trench bottom to prevent slight uneven settlement; and the connection between the trench bottom 5 and the first trench wall 6 needs to be roughened before pouring the first trench wall 6 to enhance the structural connectivity of the two pourings.

[0037] The construction method of the external flood interception ditch structure for mine restoration and treatment projects in this embodiment includes the following steps:

[0038] Step 1: Construction layout, determine the line position of the trench body, use construction machinery or equipment to remove the loose soil on the construction surface, confirm the trench width, and then start trench excavation construction;

[0039] Step 2: Trench excavation. During the trench excavation process, the trench needs to be widened by at least 2 trench widths upward along the mountain slope. During the construction process, it is important to remove the severely weathered surface rock layer as much as possible and excavate to the fresh bedrock surface 3. The trench bottom needs to be excavated as far as possible when the construction machinery can work, and excavate to the fresh bedrock surface 3;

[0040] Step 3: Trench construction, the construction is divided into four parts, as follows:

[0041] ① During the pouring of the trench bottom 5, appropriate reinforcement can be provided in the trench bottom 5 according to the rock properties and bearing capacity of the exposed rock layer at the trench bottom to prevent slight uneven settlement, and the top surface of the trench bottom 5 is formed with a slope of 20-30% to accelerate drainage;

[0042] ② When pouring the first trench wall 6, the planting of the reinforcement bars 9 of the first trench wall 6 must be carried out simultaneously with the planting of the reinforcement bars 9 of the trench bottom 5 to enhance the connection integrity between the first trench wall 6 and the trench bottom 5; before pouring concrete on the first trench wall 6, the connection between the trench bottom 5 and the first trench wall 6 must be roughened to enhance the structural connectivity of the two pourings;

[0043] ③ The second trench wall 7 is constructed using water-permeable masonry materials. The bottom of the second trench wall 7 is located above the trench bottom 5 and is half embedded in the trench bottom 5 to enhance the connectivity and integrity of the two different structures. The vertical surface of the second trench wall 7 does not need to be covered with cement mortar to ensure the water permeability of the second trench wall 7.

[0044] ④ Backfill construction: the trench formed by the water-facing surface of the second trench wall 7, the trench bottom 5 and the fresh bedrock surface 3 is backfilled with crushed stones 8 generated during the trench excavation construction process. Only half the height of the second trench wall 7 needs to be backfilled.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An external flood interception ditch structure for mine restoration and management engineering, comprising a ditch body, the ditch body comprising a ditch bottom, a first ditch wall and a second ditch wall, the first ditch wall being arranged at one end of the ditch bottom close to the mine enclosure, and the second ditch wall being arranged at one end of the ditch bottom away from the mine enclosure; characterized in that: The slope surface close to the water-facing side of the ditch body is a fresh bedrock surface; the ditch bottom and the first ditch wall are both reinforced concrete structures, and the second ditch wall is a permeable brick masonry structure.

2. The external flood interception ditch structure for mine restoration and management engineering according to claim 1, characterized in that: The width of the fresh bedrock surface is at least twice the width of the trench body.

3. The external flood interception ditch structure for mine restoration and management engineering according to claim 1, characterized in that: The trench bottom extends from the lower side of the second trench wall toward the water-facing side to the fresh bedrock surface.

4. The external flood interception ditch structure for mine restoration and management engineering according to claim 3 is characterized by: The second trench wall, the trench bottom and the fresh bedrock surface form a trench, and the trench is backfilled with crushed stones generated during the trench excavation construction process.

5. The external flood interception ditch structure for mine restoration and management engineering according to claim 4, characterized in that: The backfill height of the crushed stone is half of the height of the second trench wall.

6. The external flood interception ditch structure for mine restoration and management engineering according to claim 1, characterized in that: The top surface of the groove bottom is inclined downward from the second groove wall to the first groove wall.

7. The external flood interception ditch structure for mine restoration and management engineering according to claim 6, characterized in that: The slope of the top surface of the ditch bottom is 20-30%.

8. The external flood interception ditch structure for mine restoration and management engineering according to claim 1, characterized in that: The top surfaces of the first ditch wall and the second ditch wall are higher than the original mountain slope line.

9. The external flood interception ditch structure for mine restoration and management engineering according to claim 1, characterized in that: The height of the second groove wall is greater than the height of the first groove wall.

10. The external flood interception ditch structure for mine restoration and management engineering according to claim 1, characterized in that: The embedded steel bars in the first trench wall and the embedded steel bars in the trench bottom are connected as a whole.

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