Coal mine water prevention and control drainage system and method

Abstract

The invention provides a coal mine water prevention and control drainage system and method, and relates to the technical field of coal mine water prevention and control. Whole-process automation and continuous drainage of dredging operation are achieved, and safety and efficiency are remarkably improved; the sedimentation tank is divided into a water bin and a sedimentation bin, and is matched with sequential control of three valves, so that cyclic operation of three stages of'upper-layer drainage and lower-layer sedimentation ', 'upper-layer drainage and lower-layer drainage', and'upper-layer drainage and lower-layer desilting 'is realized. The circulating operation is characterized in that the desilting operation only needs to close the first valve to isolate the water sump and the sedimentation bin without stopping water inlet of the whole system and normal water drainage of the water sump, so that the major defect that water drainage must be interrupted in traditional manual cleaning is thoroughly overcome, continuity of water control work is guaranteed, and the working efficiency is improved. And the potential safety hazard caused by the drainage window period is greatly eliminated. And meanwhile, workers are thoroughly liberated from high-risk and heavy dredging work, and the safety risk and the labor cost are fundamentally reduced.

Description

Technical Field

[0001] This invention relates to the field of coal mine water control technology, specifically to a coal mine water control drainage system and method. Background Technology

[0002] Water control is a crucial aspect of safe coal mine production. Water accumulation in coal mine areas primarily originates from underground production water, dust suppression spraying, tunnel watering, and potential seepage from fissures. To ensure a safe working environment, prevent equipment flooding, and guarantee normal production, a comprehensive drainage system is essential. Currently, a common practice is to install sedimentation ponds in lower-lying areas of the mining area's roadways, introducing collected mine water into these ponds for initial sedimentation before pumping it to the main water tank or the surface.

[0003] However, existing settling ponds in mining areas have significant drawbacks in practical use. Mine water typically contains large amounts of solid particulate impurities such as coal dust and rock fragments. These impurities gradually accumulate at the bottom of the settling pond after settling, forming a thick layer of coal slag. As the amount of slag increases, the effective volume of the settling pond decreases significantly, leading to a sharp decline in its water storage capacity and sedimentation effect. This not only increases the frequency of pump start-ups and shutdowns and wear and tear but also poses a safety hazard of flooding roadways due to untimely drainage.

[0004] To address the problem of coal slag accumulation, the current common method is to periodically schedule manual cleaning. Before cleaning, drainage must be stopped, the water in the pool emptied, and then workers enter the pool to load the accumulated coal slag onto trucks and transport it out using shovels and other tools. This process presents several significant problems: First, the cleaning work is labor-intensive and the working environment is harsh (damp, confined, and potentially containing harmful gases), posing a threat to worker health and safety. Second, cleaning requires interrupting drainage, affecting normal mine water control operations and creating safety risks. Third, frequent manual cleaning requires a large investment of manpower and time, resulting in high maintenance costs and low efficiency. Finally, manual cleaning cannot be continuous; the slag accumulation problem is cyclical, making it difficult to fundamentally achieve automated and intelligent drainage management.

[0005] Therefore, there is an urgent need in this field for a coal mine water control and drainage system and method that can automatically and efficiently remove coal slag deposits in sedimentation tanks, in order to overcome the various defects caused by the reliance on manual cleaning in existing technologies and achieve continuous, efficient and safe operation of the drainage system. Summary of the Invention

[0006] The purpose of this invention is to provide a coal mine water control and drainage system and method that can automatically and efficiently remove coal slag deposits in sedimentation tanks.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A coal mine water control and drainage system, comprising: The sedimentation tank is arranged vertically from top to bottom as a water tank and a sedimentation tank. The water inlet channel is connected to the upper end of the water tank and is used to allow mine water to flow into the water tank; The inter-tank pipeline connects the water tank and the sedimentation tank, and the inter-tank pipeline is equipped with a first valve that can open and close the inter-tank pipeline. The first drainage pipe is connected to the lower end of the water tank and is used to drain the water in the water tank. The second drainage pipe is connected to the lower end of the sedimentation tank and is used to drain the water in the sedimentation tank. The second drainage pipe is equipped with a second valve that can open and close the second drainage pipe. The sludge discharge pipe is connected to the lower end of the sedimentation tank and is used to discharge the coal slag in the sedimentation tank. A third valve is installed on the sludge discharge pipe to open and close the sludge discharge pipe. The lifting device is used to transfer the coal slag discharged from the sludge discharge pipe.

[0008] Furthermore, it also includes a control unit, which is connected to the control terminals of the first valve, the second valve, the third valve, and the lifting device.

[0009] Furthermore, it also includes a density sensor and / or a water level sensor that are connected to the control unit via signals; A density sensor is installed inside the sedimentation tank to monitor the density changes of the mine water in the sedimentation tank in real time. The water level sensor is installed inside the sedimentation tank to monitor the changes in the mine water level in real time.

[0010] Furthermore, the bottom of the sedimentation tank is provided with a first inclined surface, the inlet end of the second drainage pipe is located at the high end of the first inclined surface, and the inlet end of the sludge discharge pipe is located at the low end of the first inclined surface.

[0011] Furthermore, a second inclined surface is provided at the bottom of the water tank, and the inlet end of the inter-tank pipe is located at the lower end of the second inclined surface.

[0012] Furthermore, the inlet end of the first drainage pipe is located above the inlet end of the intercom pipe.

[0013] Furthermore, filter screens are provided at the inlet ends of the first drainage pipe and the second drainage pipe.

[0014] Furthermore, the lifting device includes a scraper conveyor, which is installed in the inclined tunnel, with the tail of the scraper conveyor located at the outlet end of the sludge discharge pipe.

[0015] Furthermore, the lifting device also includes a transfer hopper, the inlet end of which is located at the head of the scraper conveyor.

[0016] A coal mine water control and drainage method, employing the aforementioned coal mine water control and drainage system, wherein the method cyclically executes steps S1 to S3: S1, upper layer drainage, lower layer sedimentation; The first valve is open, the second valve is closed, and the third valve is closed. The water inlet channel flows into the water tank and sedimentation tank, and the water in the mine is discharged through the first drainage pipe. The coal slag in the mine water enters the sedimentation tank through the inter-tank pipe under its own gravity and accumulates at the bottom of the sedimentation tank. S2, Upper layer drainage allows for temporary sedimentation, lower layer drainage; When the density sensor detects that the density of the mine water in the sedimentation chamber reaches the set threshold, the control unit controls the first valve to close, the second valve to open, and the third valve to close. Mine water flows into the water chamber through the water inlet channel. The water in the mine water is discharged through the first drainage pipe. The coal slag in the mine water temporarily accumulates to the bottom of the water chamber under its own gravity. The water above the sedimentation chamber is discharged through the second drainage pipe. S3: Upper layer drainage for temporary sedimentation, lower layer dredging; When the water level sensor detects that the mine water level in the sedimentation tank reaches the set threshold, the control unit controls the first valve to close and the third valve to open, the lifting device to start, and the water inlet channel flows into the water tank. The water in the mine tank is discharged through the first drainage pipe. The coal slag in the mine water temporarily accumulates to the bottom of the water tank under its own gravity. The coal slag in the sedimentation tank is discharged through the sludge discharge pipe, and the lifting device will transfer the coal slag discharged from the sludge discharge pipe.

[0017] The beneficial technical effects of this invention are: 1. This invention achieves full automation and continuous drainage in dredging operations, significantly improving safety and efficiency. By cleverly dividing the sedimentation tank into a water tank and a sedimentation tank, and coordinating the sequential control of three valves (first, second, and third valves), this invention enables a cyclical operation of three stages: "upper layer drainage, lower layer sedimentation," "upper layer drainage, lower layer drainage," and "upper layer drainage, lower layer dredging." The essence of this cyclical operation lies in the fact that dredging only requires closing the first valve to isolate the water tank and the sedimentation tank, without stopping the entire system's water intake and normal drainage. This completely overcomes the major drawback of traditional manual dredging, which requires interrupting drainage, ensuring the continuity of water control work and greatly eliminating the safety hazards caused by drainage gaps. Simultaneously, it completely liberates workers from the high-risk and arduous dredging work, fundamentally reducing safety risks and labor costs.

[0018] 2. The dredging triggering mechanism of this invention is intelligent and precise, avoiding energy waste and equipment idling. By setting density sensors and / or water level sensors connected to the control unit, the system can monitor the accumulation of coal slag in the sedimentation tank in real time (indirectly reflected by density changes or changes in the liquid level after sedimentation). The control unit can intelligently determine the timing of lower-level drainage and dredging based on the data uploaded by the sensors, automatically starting the lower-level drainage stage (S2) and the dredging operation stage (S3), thereby avoiding the problems of "dredging before full" or "clogging due to overfilling" that may be caused by periodic dredging based on experience. This makes the dredging operation more scientific and precise, improves system operating efficiency, and extends the service life of the equipment.

[0019] 3. This invention features an ingenious structural design, utilizing gravity flow to achieve efficient collection and discharge of coal slag, resulting in high reliability. The invention incorporates a first inclined surface at the bottom of the sedimentation tank, placing the inlet of the second drainage pipe at the higher end and the inlet of the sludge discharge pipe at the lower end. This structure ensures that during the lower drainage stage (S2), the water flow does not easily disturb the settled coal slag, guaranteeing the quality of the drainage water. During the sludge removal stage (S3), the coal slag naturally slides towards the lower sludge discharge pipe inlet under gravity, significantly reducing sludge discharge resistance and making the sludge removal smoother and more thorough, minimizing the risk of blockage. Similarly, the second inclined surface at the bottom of the water tank also facilitates the collection of coal slag towards the inlet of the inter-tank pipe, ensuring efficient transfer of coal slag to the sedimentation tank during stage S1. Furthermore, the inlet of the first drainage pipe is located above the inlet of the inter-tank pipe, allowing the coal slag filtered by the filter screen at the inlet of the first drainage pipe to collect at the inlet of the inter-tank pipe.

[0020] 4. This invention enables continuous and centralized transfer of coal slag, creating conditions for resource recycling. The system directly transports coal slag to a scraper conveyor via a sludge discharge pipe, and can further centrally transport it out through transfer hoppers. This design forms a closed-loop production line from sedimentation and separation to lifting and transfer, which not only has a handling efficiency far exceeding that of manual operations, but also collects coal slag with relatively low moisture content and high purity, facilitating its subsequent resource utilization as low-calorific-value fuel or building material, turning waste into treasure, and improving both economic and environmental benefits.

[0021] 5. The system layout of this invention is reasonable. The water tank and sedimentation tank of the sedimentation tank are arranged vertically from top to bottom, and the hoisting device is set in the inclined roadway, making full use of the underground space. The entire system has a compact structure and few maintenance points, making it very suitable for long-term reliable operation in the harsh environment of underground coal mines. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a coal mine water control and drainage system according to an embodiment of the present invention; Figure 2 This is a flowchart of a coal mine water control and drainage method according to an embodiment of the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. Certain embodiments of the invention will be described more fully below with reference to the accompanying drawings, and some, but not all, of these embodiments will be shown. In fact, various embodiments of the invention can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to enable the invention to meet applicable legal requirements.

[0024] In the description of this invention, it should be noted that the terms "inner," "outer," "upper," "lower," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for 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. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In this embodiment of the invention, a coal mine water control and drainage system and method are provided. Please refer to [reference needed]. Figure 1 , Figure 2 As shown.

[0026] A coal mine water control and drainage system includes a sedimentation tank (water tank 11 and sedimentation tank 12), a water inlet channel 2, an inter-tank pipe 3, a first drainage pipe 41, a second drainage pipe 42, a sludge discharge pipe 6, and a lifting device.

[0027] The sedimentation tanks are arranged vertically from top to bottom as water tank 11 and sedimentation tank 12.

[0028] The water inlet channel 2 is connected to the upper end of the water tank 11. The water inlet channel 2 is used to flow mine water into the water tank 11. The water inlet channel 2 can be a drainage ditch in the coal mining area.

[0029] The inter-tank pipeline 3 connects the water tank 11 and the sedimentation tank 12. The inter-tank pipeline 3 is equipped with a first valve 71 that can open and close the inter-tank pipeline 3.

[0030] The first drainage pipe 41 is connected to the lower end of the water tank 11 and is used to drain the water in the water tank 11.

[0031] The second drainage pipe 42 is connected to the lower end of the sedimentation tank 12. The second drainage pipe 42 is used to drain the water in the sedimentation tank 12. A second valve 72 is provided on the second drainage pipe 42 to open and close the second drainage pipe 42.

[0032] The sludge discharge pipe 6 is connected to the lower end of the sedimentation tank 12. The sludge discharge pipe 6 is used to discharge the coal slag in the sedimentation tank 12. A third valve 73 is installed on the sludge discharge pipe 6 to open and close the sludge discharge pipe 6.

[0033] The lifting device is used to transfer the coal slag discharged from the sludge discharge pipe 6.

[0034] The control unit is connected to the first valve 71, the second valve 72, the third valve 73, and the control terminal of the lifting device via signal cables. The control unit controls the opening and closing of the first valve 71, the second valve 72, the third valve 73, and the lifting device.

[0035] The control unit signals are connected to density sensor 81 and water level sensor 82 via signal cables. Density sensor 81 is installed inside sedimentation tank 12 and is used to monitor the density changes of the mine water in sedimentation tank 12 in real time. When the density of the mine water in sedimentation tank 12 increases to a set threshold, it indicates that there is a large amount of coal slag in sedimentation tank 12, requiring drainage of the lower sedimentation tank 12. Water level sensor 82 is installed inside sedimentation tank 12 and is used to monitor the liquid level changes of the mine water in sedimentation tank 12 in real time. When the liquid level of the mine water in sedimentation tank 12 decreases to a set threshold, it indicates that the water in the upper part of sedimentation tank 12 has been largely drained.

[0036] The bottom of the sedimentation tank 12 is provided with a first inclined surface 121. The inlet end of the second drainage pipe 42 is located at the high end of the first inclined surface 121, and the inlet end of the sludge discharge pipe 6 is located at the low end of the first inclined surface 121. Thus, by setting the first inclined surface 121 at the bottom of the sedimentation tank 12 and placing the inlet end of the second drainage pipe 42 at the high end and the inlet end of the sludge discharge pipe 6 at the low end, this structure ensures that during the lower-level drainage stage (S2), the water flow does not easily agitate the settled coal slag, guaranteeing the quality of the drainage water. During the sludge removal stage (S3), the coal slag can naturally slide towards the inlet of the lower-end sludge discharge pipe 6 under gravity, greatly reducing sludge removal resistance, making sludge removal smoother and more thorough, and reducing the risk of blockage.

[0037] A second inclined surface 111 is provided at the bottom of the water tank 11, and the inlet end of the inter-tank pipe 3 is located at the lower end of the second inclined surface 111. The second inclined surface 11 at the bottom of the water tank 11 facilitates the collection of coal slag towards the inlet of the inter-tank pipe 3, ensuring that the coal slag in stage S1 can be efficiently transferred to the sedimentation tank 12.

[0038] The inlet end of the first drainage pipe 41 is located above the inlet end of the inter-bin pipe 3, so that the coal slag isolated by the filter screen 5 at the inlet end of the first drainage pipe 41 can be collected at the inlet of the inter-bin pipe 3.

[0039] A filter screen 5 is installed at the inlet end of the first drainage pipe 41 and the inlet end of the second drainage pipe 42, so that the filter screen 5 isolates the coal slag in the water tank 11 and the sedimentation tank 12.

[0040] The hoisting device includes a scraper conveyor 91 and a transfer hopper 92. The scraper conveyor 91 is located in the inclined shaft 90, with its tail end at the outlet end of the sludge discharge pipe 6 and its inlet end at the head end of the scraper conveyor 92. When the scraper conveyor 91 operates, it transports the coal slag from the outlet end of the sludge discharge pipe 6 from its tail end to its head end, and then through the transfer hopper 92 to the mine car 93, from which it is transported out.

[0041] A coal mine water control and drainage method, using the coal mine water control and drainage system described above in this embodiment, wherein the method is executed cyclically from S1 to S3: S1, upper layer drainage, lower layer sedimentation; The first valve 71 is open, the second valve 72 is closed, and the third valve 73 is closed. The water inlet channel 2 flows into the water tank 11 and the sedimentation tank 12. The water in the mine water is discharged through the first drainage pipe 41. The coal slag in the mine water enters the sedimentation tank 12 through the inter-tank pipe 3 under its own gravity and accumulates at the bottom of the sedimentation tank 12. S2, Upper layer drainage allows for temporary sedimentation, lower layer drainage; When the density sensor 81 detects that the density of the mine water in the sedimentation tank 12 reaches the set threshold, the control unit controls the first valve 71 to close, the second valve 72 to open, and the third valve 73 to close. The water inlet channel 2 flows into the water tank 11, and the water in the mine water is discharged through the first drainage pipe 41. The coal slag in the mine water temporarily accumulates to the bottom of the water tank 11 under its own gravity, and the water above the sedimentation tank 12 is discharged through the second drainage pipe 42. S3: Upper layer drainage for temporary sedimentation, lower layer dredging; When the water level sensor 82 detects that the mine water level in the sedimentation tank 12 reaches the set threshold, the control unit controls the first valve 71 to close and the third valve 73 to open, the lifting device to start operation, the water inlet channel 2 flows into the water tank 11, the water in the mine water is discharged through the first drainage pipe 41, the coal slag in the mine water temporarily accumulates to the bottom of the water tank 11 under its own gravity, the coal slag in the sedimentation tank 12 is discharged through the sludge discharge pipe 6, and the lifting device will transfer the coal slag discharged from the sludge discharge pipe 6 out.

[0042] The present invention has been described in detail above with reference to the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the coal mine water control and drainage system and method of the present invention. Of course, the specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A coal mine water control and drainage system, characterized in that, include: The sedimentation tank is arranged vertically from top to bottom as a water tank and a sedimentation tank. The water inlet channel is connected to the upper end of the water tank and is used to allow mine water to flow into the water tank; The inter-tank pipeline connects the water tank and the sedimentation tank, and the inter-tank pipeline is equipped with a first valve that can open and close the inter-tank pipeline. The first drainage pipe is connected to the lower end of the water tank and is used to drain the water in the water tank. The second drainage pipe is connected to the lower end of the sedimentation tank and is used to drain the water in the sedimentation tank. The second drainage pipe is equipped with a second valve that can open and close the second drainage pipe. The sludge discharge pipe is connected to the lower end of the sedimentation tank and is used to discharge the coal slag in the sedimentation tank. A third valve is installed on the sludge discharge pipe to open and close the sludge discharge pipe. The lifting device is used to transfer the coal slag discharged from the sludge discharge pipe.

2. The coal mine water control and drainage system according to claim 1, characterized in that: It also includes a control unit, which is connected to the control terminals of the first valve, the second valve, the third valve, and the lifting device.

3. A coal mine water control and drainage system according to claim 2, characterized in that: It also includes a density sensor and / or a water level sensor that are connected to the control unit via signals; A density sensor is installed inside the sedimentation tank to monitor the density changes of the mine water in the sedimentation tank in real time. The water level sensor is installed inside the sedimentation tank to monitor the changes in the mine water level in real time.

4. A coal mine water control and drainage system according to claim 1, characterized in that: The bottom of the sedimentation tank is provided with a first inclined surface, the inlet end of the second drainage pipe is located at the high end of the first inclined surface, and the inlet end of the sludge discharge pipe is located at the low end of the first inclined surface.

5. A coal mine water control and drainage system according to claim 1, characterized in that: The bottom of the water tank is provided with a second inclined surface, and the inlet end of the inter-tank pipe is located at the lower end of the second inclined surface.

6. A coal mine water control and drainage system according to claim 1, characterized in that: The inlet end of the first drainage pipe is located above the inlet end of the intercom pipe.

7. A coal mine water control and drainage system according to claim 1, characterized in that: The inlet ends of the first drainage pipe and the second drainage pipe are equipped with filter screens.

8. A coal mine water control and drainage system according to claim 1, characterized in that: The lifting device includes a scraper conveyor, which is installed in the inclined tunnel, with the tail of the scraper conveyor located at the outlet end of the sludge discharge pipe.

9. A coal mine water control and drainage system according to claim 8, characterized in that: The lifting device also includes a transfer hopper, the inlet end of which is located at the head of the scraper conveyor.

10. A method for preventing and draining water in coal mines, using the coal mine water prevention and drainage system according to any one of claims 1 to 9, characterized in that, The method is executed cyclically from S1 to S3: S1, upper layer drainage, lower layer sedimentation; The first valve is open, the second valve is closed, and the third valve is closed. The water inlet channel flows into the water tank and sedimentation tank, and the water in the mine is discharged through the first drainage pipe. The coal slag in the mine water enters the sedimentation tank through the inter-tank pipe under its own gravity and accumulates at the bottom of the sedimentation tank. S2, Upper layer drainage allows for temporary sedimentation, lower layer drainage; When the density sensor detects that the density of the water in the sedimentation tank reaches the set threshold, the control unit controls the first valve to close, the second valve to open, and the third valve to close. Mine water flows into the water tank through the water inlet channel. The water in the mine water is discharged through the first drainage pipe. The coal slag in the mine water temporarily accumulates to the bottom of the water tank under its own gravity. The water above the sedimentation tank is discharged through the second drainage pipe. S3: Upper layer drainage for temporary sedimentation, lower layer dredging; When the water level sensor detects that the water level in the sedimentation tank reaches the set threshold, the control unit controls the first valve to close and the third valve to open, the lifting device to start, and the water inlet channel flows into the water tank. The water in the mine is discharged through the first drainage pipe. The coal slag in the mine is temporarily deposited at the bottom of the water tank under its own gravity. The coal slag in the sedimentation tank is discharged through the sludge discharge pipe, and the lifting device will transfer the coal slag discharged from the sludge discharge pipe.

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