Double-sedimentation pool for underground coal mine

Abstract

This utility model discloses a dual sedimentation tank in an underground coal mine, comprising a bottom shaft yard, a roadway, a bypass roadway, a set of sedimentation tanks, a retaining wall, and a set of ditches arranged sequentially. The sedimentation tanks are arranged side-by-side below the roadway. The retaining wall is located between the sedimentation tanks to separate them. One end of each sedimentation tank near the bypass roadway is the inlet side, and the other end is the outlet side. The ditches are located at both ends of the sedimentation tanks, and gates are provided at the connections to both the inlet and outlet sides. A slope change point is located in the middle of each sedimentation tank, and the slope from the inlet side to the slope change point is gradient from high to low. This dual sedimentation tank in an underground coal mine, by arranging the two sedimentation tanks side-by-side and coordinating them with gate control, ensures uninterrupted drainage during dredging, greatly improving the continuity and safety of dredging and drainage. At the same time, the integrated layout significantly shortens the length of the ditches, simplifies the structure, reduces the amount of engineering work and construction costs, and facilitates centralized management and maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of underground sedimentation tanks in coal mines, and specifically relates to a dual sedimentation tank for underground coal mines. Background Technology

[0002] During underground coal mining operations, a large amount of mine water containing solid particles such as mud, sand, and coal dust is generated. To protect the drainage system, sedimentation tanks are typically installed to pre-treat the wastewater.

[0003] Traditional underground sedimentation technologies mainly take two forms: First, a single sedimentation tank is used, which has limited processing capacity. When cleaning sludge from the tank, water intake must be completely stopped, directly affecting normal mine drainage and posing safety hazards. Second, multiple sedimentation tanks are dispersed in different locations underground. While this layout allows for alternating sludge removal, it leads to problems such as excessively long drainage ditches, large engineering workload, and system complexity. This not only increases construction and maintenance costs but also reduces overall operational efficiency due to decentralized management. Furthermore, existing sedimentation tanks often have poor flow control in their structural design. For example, an unreasonable slope can lead to excessively fast or slow flow velocities, affecting the effective settling of suspended particles and resulting in unsatisfactory sedimentation effects.

[0004] The aforementioned shortcomings collectively lead to problems such as high sludge load in the water tank, frequent cleaning, high operating costs, and inconvenient management. Utility Model Content

[0005] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide a dual sedimentation tank in underground coal mines. By arranging the two sedimentation tanks side by side and cooperating with gate control, uninterrupted drainage is ensured during dredging, which greatly improves the continuity and safety of dredging and drainage. At the same time, the integrated layout significantly shortens the length of the water ditch, simplifies the structure, reduces the amount of engineering and construction costs, and facilitates centralized management and maintenance.

[0006] Technical Solution: To achieve the above objectives, this utility model provides a dual sedimentation tank in a coal mine, comprising a bottom shaft yard, a roadway, a bottom shaft yard bypass, a set of sedimentation tanks, a retaining wall, and a set of water ditches arranged sequentially; the sedimentation tanks are arranged side by side below the roadway; the retaining wall is located between the sedimentation tanks to separate them; one end of each sedimentation tank near the bottom shaft yard bypass is the inlet side, and the other end is the outlet side; the water ditches are located at both ends of the sedimentation tanks; and gates are provided at the connections to both the inlet and outlet sides; a slope change point is provided in the middle of the sedimentation tank; and the slope from the inlet side to the slope change point is from high to low. The sedimentation tanks are arranged side-by-side below the tunnel, allowing for close integration between the tanks and the tunnel. This facilitates the use of tunnel space for the construction of the sedimentation tanks and reduces additional space occupation. The retaining wall effectively separates the two sedimentation tanks, preventing water flow from interfering with each other and ensuring relatively independent water flow in each tank. It also ensures uninterrupted drainage during dredging, greatly improving the continuity and safety of dredging and drainage. The drainage ditch facilitates the connection between the sedimentation tanks and external water flow, enabling the introduction and export of water. The setting of the slope change point and the slope design from the inlet side to the slope change point create a certain velocity variation in the water flow within the sedimentation tank, which helps impurities in the water to settle better.

[0007] Furthermore, several anchor bolts and anchor cables are evenly provided on the perimeter wall of the tunnel, which enhances the stability of the tunnel, prevents the collapse of the rock or soil on the perimeter wall of the tunnel, and provides a guarantee for the safe operation of facilities such as sedimentation tanks.

[0008] Furthermore, the slope from the water inlet side to the slope change point is set at 8 degrees; the bypass from the bottom of the well to the water inlet side has a slope from high to low, and the slope is set at 3‰. This slope design allows the water flow to have a certain velocity before entering the sedimentation tank, which helps to initially settle and separate larger impurities in the water before they enter the sedimentation tank. It also ensures smooth water flow and prevents excessively fast flow from significantly interfering with the sedimentation process in the sedimentation tank, thereby improving the purification effect of the sedimentation tank on the water quality.

[0009] Furthermore, the bottom of the sedimentation tank has a slope from high to low from the inlet side to the outlet side, and the slope is set at 3‰. The slope of the bottom of the sedimentation tank can create a certain flow direction for the water in the sedimentation tank, which is conducive to the gradual sedimentation of impurities in the water along the slope direction. At the same time, it can also ensure the smooth flow of water in the sedimentation tank, prevent the water from stagnating, and improve the operating efficiency and sedimentation effect of the sedimentation tank.

[0010] Furthermore, the two ends of the gate are respectively inserted into the side wall of the sedimentation tank and the retaining wall, so that the gate forms a tight connection with the side wall of the sedimentation tank and the retaining wall, which improves the sealing and stability of the gate, thereby better controlling the water flow.

[0011] Furthermore, the water ditch on the outlet side is located close to the side wall of the tunnel, which facilitates the guidance of the water flow after sedimentation tank treatment to the vicinity of the side wall of the tunnel for operations such as entering the water tank, and is conducive to centralized management and control of the water flow.

[0012] Furthermore, the water inlet ditch is located in the middle of the tunnel, which can better collect the water flow in the tunnel and allow the water flow to smoothly enter the sedimentation tank for treatment. This is beneficial for the cleaning equipment to enter the sedimentation tank for cleaning during dredging.

[0013] As can be seen from the above technical solution, this utility model has the following beneficial effects: 1. This utility model provides a dual sedimentation tank for underground coal mines. By arranging two sedimentation tanks side by side and coordinating them with gate control, it ensures uninterrupted drainage during dredging, greatly improving the continuity and safety of dredging and drainage. 2. This utility model provides a dual sedimentation tank for underground coal mines. The integrated layout significantly shortens the length of the water ditch, simplifies the structure, reduces the amount of engineering work and construction costs, and facilitates centralized management and maintenance. 3. This utility model provides a dual sedimentation tank for underground coal mines. The optimized slope design and tank structure effectively increase the water flow cross-section, reduce the flow velocity, and extend the sedimentation path, thereby improving the sedimentation efficiency of particulate matter, reducing the amount of sludge entering the water tank, extending the water tank cleaning cycle, and achieving outstanding comprehensive benefits. Attached Figure Description

[0014] Figure 1 This is a schematic diagram (top view) of the structure of a dual sedimentation tank in an underground coal mine according to the present invention. Figure 2 for Figure 1 The main view; Figure 3 for Figure 1 AA-direction cross section; In the picture: 1- Bottom of the shaft yard; 2-Tunnel; 21-Anchor bolt; 22-Anchor cable; 3-Detour around the well bottom yard; 4-Sedimentation tank; 41-Inlet side; 42-Outlet side; 43-Slope change point; 5- Retaining wall; 6-Ditch; 7-Gate. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. Example

[0016] In this embodiment, as Figure 1 and Figure 2 This utility model discloses a dual sedimentation tank in a coal mine, comprising a bottom yard 1, a roadway 2, a bottom yard bypass 3, a set of sedimentation tanks 4, a retaining wall 5, and a set of ditches 6 arranged sequentially. The sedimentation tanks 4 are arranged side by side below the roadway 2. The retaining wall 5 is located between the sedimentation tanks 4 to separate the two sedimentation tanks 4. One end of the sedimentation tank 4 near the bottom yard bypass 3 is the water inlet side 41, and the other end is the water outlet side 42. The ditches 6 are located at both ends of the sedimentation tanks 4, and gates 7 are provided at the connection points with the water inlet side 41 and the water outlet side 2. A slope change point 43 is provided in the middle of the sedimentation tank 4. The slope from the water inlet side 41 to the slope change point 43 is from high to low.

[0017] Specifically, the width of the alleyway is set to 5.5m, and the depth of the sedimentation tank 4 is 2m as an option. A retaining wall 5 with a width of 0.3m is set between the two sedimentation tanks 4. The net width of the sedimentation tank 4 is 2.5m, and generally not less than 2.0m, which is conducive to the cleaning equipment entering the sedimentation tank 4 for cleaning. The width of the cleaning equipment is generally about 1.5m.

[0018] Specifically, the retaining wall 5 is preferably a reinforced concrete water retaining wall.

[0019] In this embodiment, as Figure 1 and Figure 3 The tunnel walls are uniformly provided with a number of anchor bolts 21 and a number of anchor cables 22.

[0020] Specifically, such as Figure 3 The length of the anchor cable 22 is greater than that of the anchor rod 21; the distribution distance of the anchor cables 22 at the top of the arc above the tunnel 2 is preferably set to 2.0m, and the distribution distance of the anchor cables 22 on both sides of the tunnel 2 is preferably set to 1.5m.

[0021] In this embodiment, as Figure 1 and Figure 2 The slope from the water inlet side 41 to the slope change point 43 is set to 8 degrees; the well bottom detour 3 to the water inlet side 41 has a slope from high to low, and the slope is set to 3‰.

[0022] Specifically, the sedimentation tank 4 is rectangular, and the length of the inclined section from the inlet side 41 to the slope change point 43 is 43m. The water flows horizontally, and the increased length of the sedimentation tank helps to increase the sedimentation time.

[0023] In this embodiment, as Figure 1 and Figure 2 The bottom of the sedimentation tank 4 has a slope from the inlet side 41 to the outlet side 42, which is set to 3‰ to prevent large inflows of water from the well, such as 1000m³. 3 / h or higher.

[0024] In this embodiment, as Figure 1 and Figure 2 The gate 7 is inserted into the side wall of the sedimentation tank 4 and the retaining wall 5 at both ends, respectively.

[0025] Specifically, there are four gates 7 located at both ends of the two sedimentation tanks 4, which are used to control the flow of water into and out of the sedimentation tanks 4.

[0026] In this embodiment, as Figure 1 and Figure 2 The water ditch 6 on the outlet side 42 is located near the side wall of the tunnel 2; the water ditch 6 on the inlet side 41 is located in the middle of the tunnel 2.

[0027] Specifically, a pressure relief sill or a gradually widening ditch section can be installed in the ditch 6 to reduce the water flow velocity, disrupt the kinetic energy of the water flow, and allow it to smoothly enter the inlet side 41 of the sedimentation tank 4, thereby reducing the impact and disturbance of the water flow on the settled sludge.

[0028] The working principle of the above embodiments is as follows: This utility model discloses a dual sedimentation tank in a coal mine. Mine water flows from the bottom of the mine shaft 1 into the inlet ditch 6 in the middle of the roadway 2, and then enters two sedimentation tanks 4 through an open gate 7. The water flow slows down in the 8-degree slope section from the inlet side 41 to the slope change point 43, and solid particles settle in the tank. The clarified water flows over the outlet side 42 at the end of the retaining wall 5 and is discharged into the water tank through the ditch 6 at that end. When dredging is required, the gates 7 at both ends of one sedimentation tank 4 can be closed for cleaning, while the other sedimentation tank 4 continues to operate normally.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A dual sedimentation tank for underground coal mines, characterized in that: include: The following are arranged in sequence: bottom yard (1), tunnel (2), and bottom yard bypass (3); A set of sedimentation tanks (4) are arranged side by side below the tunnel (2); A retaining wall (5) is provided between sedimentation tanks (4) to separate the two sedimentation tanks (4). The sedimentation tank (4) has an inlet side (41) near the well bottom parking lot bypass (3) and an outlet side (42). A set of water ditches (6) are provided at both ends of the sedimentation tank (4); and gates (7) are provided at the connection points with the inlet side (41) and the outlet side (42). The sedimentation tank (4) has a slope change point (43) in the middle; the water inlet side (41) to the slope change point (43) has a slope from high to low.

2. The underground dual sedimentation tank in a coal mine according to claim 1, characterized in that: The tunnel (2) is uniformly provided with several anchor bolts (21) and several anchor cables (22) on its perimeter wall.

3. The underground dual sedimentation tank in a coal mine according to claim 1, characterized in that: The slope from the water inlet side (41) to the slope change point (43) is set to 8 degrees; the well bottom depot bypass (3) to the water inlet side (41) has a slope from high to low, and the slope is set to 3‰.

4. The underground dual sedimentation tank in a coal mine according to claim 1, characterized in that: The bottom of the sedimentation tank (4) has a slope from high to low from the inlet side (41) to the outlet side (42), and the slope is set to 3‰.

5. The underground dual sedimentation tank in a coal mine according to claim 1, characterized in that: The gate (7) is inserted into the side wall of the sedimentation tank (4) and the retaining wall (5) at both ends.

6. The underground dual sedimentation tank in a coal mine according to claim 1, characterized in that: The water ditch (6) on the outlet side (42) is set close to the side wall of the tunnel (2).

7. The underground dual sedimentation tank in a coal mine according to claim 1, characterized in that: The water ditch (6) on the water inlet side (41) is located in the middle of the roadway (2).

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