A method for treating cemented ore in a rock gold mine goaf based on high-pressure water technology

Abstract

The application discloses a high-pressure water technology-based rock gold mine goaf cemented ore processing method, and belongs to the technical field of mine engineering, and comprises the following steps: a stope high-pressure water platform is arranged in a working area, and a high-pressure water gun is installed in the stope high-pressure water platform; a high-pressure water pipeline is laid to the high-pressure water platform through a pipeline well, the high-pressure water pipe is connected with a fire hose, and the fire hose is connected to the high-pressure water gun; geotextile is laid along the strike of the goaf in a lower roadway of the goaf and a mine-extracting roadway; the stope cemented ore is gradually separated from top to bottom by using the high-pressure water gun, so that the ore falls on the geotextile; and the whole process realizes safe, efficient and low-disturbance processing of the rock gold mine goaf cemented ore through integrated application of the high-pressure water technology, and balances the demand for resource recovery and operation safety.

Description

Technical Field

[0001] This invention belongs to the field of mining engineering technology, and in particular relates to a method for treating sludge deposits in goaf areas of gold mines based on high-pressure water technology. Background Technology

[0002] During mining, the characteristics of cohesive ore bodies are particularly prominent. When blasting is used, the crushed ore easily clumps together, making it difficult to form a uniform, loose mass, resulting in poor blasting effectiveness. Some ore pieces remain large and adhered to each other. During ore discharge, ore is prone to blockage at the ore pass, ore bin, or stope outlet. This is especially true in processes like shallow-hole casting that rely on ore weight for discharge, where cohesion significantly reduces the ore discharge rate, resulting in a much higher residual proportion than in ordinary ore bodies. These characteristics collectively lead to low resource recovery rates and limited production efficiency during the mining of highly cohesive ore bodies. Furthermore, they easily cause a series of problems such as stope blockage and ore caking, becoming a critical technical challenge in mining production that urgently needs targeted solutions. Summary of the Invention

[0003] In view of the technical problems existing in the background art, this application provides a method for treating sludge deposits in the goaf of a gold mine based on high-pressure water technology, including: S1. In the middle section above the mining area, select a roadway with a relatively close location to arrange a water storage tank, and build a vertical multi-stage centrifugal pump station and related chamber supporting facilities in the surrounding area. S2. Install a vertical multistage centrifugal pump outside the water storage tank, and install a butterfly valve and a check valve at the outlet of the vertical multistage centrifugal pump. S3. Set up a high-pressure water platform in the working area and install high-pressure water cannons inside the high-pressure water platform; S4. Lay the high-pressure water pipeline to the high-pressure water platform through the pipe well, connect the high-pressure water pipeline to the fire hose, and connect the fire hose to the high-pressure water cannon. S5. Lay geotextile along the goaf direction in the lower roadway and the ore exit roadway of the goaf. S6. Use high-pressure water cannons to gradually separate the slab ore in the goaf from top to bottom, so that the ore falls onto the geotextile. S7, loader unloading ore.

[0004] In some implementations, in step S6, the operation time for using a high-pressure water cannon to separate the slab ore in the stope does not exceed 20 minutes.

[0005] In some implementations, in step S6, after the wastewater generated from the current operation of separating ore deposits in the stope by high-pressure water cannon is completely discharged through the lower middle section ditch, the next part of the stope ore separation operation is carried out.

[0006] In some embodiments, in step S6, the wastewater is discharged to the lower middle section inner water tank via the mine exit tunnel and the inclined ramp connecting the two layers.

[0007] In some implementations, in step S6, the water tank volume is not less than 50 cubic meters.

[0008] In some embodiments, in step S3, the high-pressure water cannon is a PS series fixed high-pressure water cannon with a built-in pressurization system, which can realize high-pressure spraying and remote operation.

[0009] In some embodiments, in step S1, the water storage tank is 15 meters long, 2 meters wide, and 1.3 meters high.

[0010] In some embodiments, in step S1, the bottom and sidewalls of the water storage tank are waterproofed.

[0011] In some embodiments, in step S2, the foundation of the vertical multistage centrifugal pump is a pit 1.0 m long × 1.0 m wide × 0.6 m deep, with four 22 mm diameter round steel bars pre-embedded in the pit as embedded parts, and the foundation is poured with C25 grade concrete.

[0012] In some embodiments, in step S1, the relevant chamber supporting facilities include a frequency converter cabinet chamber, the floor of which is more than 0.5 meters higher than the pump room floor.

[0013] This invention provides a method for treating sludge in the goaf of a gold mine based on high-pressure water technology. By constructing a water storage tank and a vertical multi-stage centrifugal pump station in section S1, the stability of the water source and power supply for high-pressure water operations is solved, providing a continuous foundation for the entire system. The combined configuration of the vertical multi-stage centrifugal pump and valves in section S2 solves the problems of pressure regulation and equipment protection for the high-pressure water flow, achieving precise pressure matching with the hardness of the sludge. The coordinated arrangement of high-pressure water pipes, fire hoses, and the work platform in section S3 resolves the contradiction between the flexibility of high-pressure water delivery and operational safety. The system ensures precise application of water flow to the target ore body. Through the pipeline laying in section S4 (the pipeline well), the safety protection and pressure loss issues of high-pressure pipelines are resolved, guaranteeing terminal operating pressure. The laying of geotextile in section S5 solves the problem of collecting and separating crushed ore, reducing resource loss and subsequent cleanup costs. The layered operation of high-pressure water cannons in section S6 addresses the efficiency and safety issues of non-blasting crushing of slab ore, avoiding the disturbance risks of traditional blasting. The continuous ore extraction by the loader in section S7 solves the problem of secondary slab caking of ore accumulation, achieving efficient connection of the processing flow. The overall process, through the integrated application of high-pressure water technology, achieves safe, efficient, and low-disturbance treatment of slab ore in the goaf of a gold mine, balancing the needs of resource recovery and operational safety.

[0014] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in this application will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of the engineering layout for a method of treating sludge deposits in a gold mine goaf based on high-pressure water technology, provided in an embodiment of this application. Figure 2 This is a schematic diagram of the engineering layout of a method for treating sludge deposits in a gold mine goaf based on high-pressure water technology, provided in an embodiment of this application. Figure 3 This is a schematic cross-sectional view of the engineering layout of a method for treating sludge deposits in a gold mine goaf based on high-pressure water technology, provided in an embodiment of this application. Figure 4 This is a schematic diagram of the high-pressure water system layout for a method of treating sludge deposits in a goaf of a gold mine based on high-pressure water technology, provided in an embodiment of this application. Figure 5 This is a schematic diagram of the high-pressure water platform layout for a method of treating sludge in a goaf of a gold mine based on high-pressure water technology, provided in an embodiment of this application. Figure 6 This is a schematic diagram of a high-pressure water cannon structure for a method of treating sludge deposits in a gold mine goaf based on high-pressure water technology, provided in an embodiment of this application.

[0017] Explanation of reference numerals in the attached diagram: 1. Upper-middle section roadway; 2. Lower-middle section roadway; 3. Stope ventilation shaft; 4. Stope slab ore; 5. Inclined ramp; 6. Ore extraction tunnel; 7. Water storage tank; 8. Vertical multi-stage centrifugal pump; 9. High-pressure water pipe; 91. Fire hose; 10. Pipeline shaft; 11. High-pressure water platform; 111. High-pressure water cannon; 12. Butterfly valve; 13. Check valve; 14. Locking buckle; 15. Primary pressure valve; 16. Solenoid valve; 17. Connecting ring; 18. Intelligent controller; 19. Battery compartment; 20. Support frame; 21. Fastening bolt; 22. Turret; 23. Infrared rangefinder; 24. Secondary pressure valve; 25. Pressure gauge; 26. Gun barrel; 27. Gun head. Detailed Implementation

[0018] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0019] 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 application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0020] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0021] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0023] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0024] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to 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 the embodiments of this application.

[0025] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0027] For ease of understanding, the embodiments of this application exemplarily provide a mining environment suitable for a method of treating sludge deposits in goaf areas of gold mines based on high-pressure water technology, referring to... Figure 1 and Figure 2 A type of compacted ore mining area includes an upper-middle section roadway 1 located at the top of the mining area and a lower-middle section roadway 2 located at the bottom of the mining area. The upper-middle section roadway 1 and the lower-middle section roadway 2 are connected by a mining area ventilation shaft 3. There is a compacted ore body 4 in the mining area. The compacted ore body 4 is the target ore body to be mined in this application. It exists because the ore particles are cemented and agglomerated due to long-term environmental factors such as pressure and humidity, or under the influence of mining operations, forming a ore body with high hardness and relatively dense structure, which is different from the loose ore morphology. It is often accompanied by the characteristics of ore agglomeration and enhanced integrity. A ramp 5 is excavated from the lower-middle section roadway 2 to the middle of the mining area. Multiple ore extraction tunnels 6 are passed through the middle of the mining area. The multiple ore extraction tunnels 6 are connected to each other through the goaf lower foot roadway and are connected to the ramp 5 through the goaf lower foot roadway.

[0028] Reference Figures 1 to 6A method for treating sludge in the goaf of a gold mine based on high-pressure water technology, wherein S1, a water storage tank 7 is arranged in a relatively close roadway in the upper middle section of the mining area, and a vertical multi-stage centrifugal pump station and related chamber facilities are built in the surrounding area; specifically, this step provides a continuous and stable basic guarantee for the high-pressure water system by establishing a water source reserve and power supply base in advance. The core function is to ensure sufficient water source and controllable pressure for high-pressure water operation. The water storage tank 7 can buffer water volume fluctuations, the vertical multi-stage centrifugal pump station is the power core for generating high-pressure water flow, and the related chambers provide safe space for equipment operation and maintenance, thereby avoiding operation stoppage due to insufficient water source or power interruption. For example, a water storage tank 7 is arranged in a roadway with a horizontal distance of ≤50 meters from the goaf. Its dimensions are designed to be 8 meters long × 5 meters wide × 3 meters deep (effective water storage capacity ≥100 cubic meters). The tank wall is made of C20 concrete (thickness ≥30 cm) to prevent leakage. A vertical multi-stage centrifugal pump station chamber is built 3-5 meters away from the water storage tank 7. The cross-sectional dimensions are 4 meters wide × 3.5 meters high × 6 meters long. The equipment foundation (concrete strength grade C25) is pre-installed inside. At the same time, a duty room (2 meters × 3 meters) and a tool storage chamber (3 meters × 2.5 meters) are built. Both are supported by anchor spraying (sprayed concrete thickness 10 cm).

[0029] S2. Install a vertical multistage centrifugal pump 8 outside the water storage tank 7, and install a butterfly valve 12 and a check valve 13 at the outlet of the vertical multistage centrifugal pump 8. This step achieves precise control of water flow pressure and direction by configuring the core pressurizing equipment (i.e., the vertical multistage centrifugal pump 8) and control components. The vertical multistage centrifugal pump 8 can generate high pressure through the superposition of multiple impellers. The butterfly valve 12 is used to flexibly adjust the water output to match the hardness requirements of different plate ore. The check valve 13 can prevent high-pressure water backflow from damaging the pump body. The three work together to ensure stable system pressure and safe operation of the equipment. For example, a vertical multistage centrifugal pump 8 of model DL12-25×5 (flow rate 12 cubic meters per hour, head 125 meters, power 11 kilowatts) is selected and installed on a concrete base 0.5 meters outside the water storage tank 7 (the base is 0.3 meters high and is fixed to the pump body with bolts); the outlet end is connected in sequence to a DN80 (i.e., compatible with a nominal diameter of 80 mm) manual butterfly valve 12 (working pressure ≥ 1.6 MPa, requires customization) and a DN80 (i.e., compatible with a nominal diameter of 80 mm) swing check valve 13 (temperature resistance ≥ 80℃). The valves are connected to the pump body by flanges, and the sealing gaskets are made of nitrile rubber.

[0030] S3. Set up a high-pressure water platform 11 in the working area, and install a high-pressure water cannon 111 inside the high-pressure water platform 11. This step provides a safe and controllable execution space for high-pressure water operations by establishing a stable operating benchmark and deploying core crushing equipment. The high-pressure water platform 11, as the supporting foundation for operators and equipment, must have sufficient structural strength to withstand operational vibrations and the impact of falling ore. The high-pressure water cannon 111, as a key component that directly acts on the slab ore, has its installation position and fixing method directly affecting the crushing accuracy and range. Through the coordinated setting of the platform and the water cannon, the directional spray of high-pressure water can be achieved, ensuring that the impact force is concentrated on the target slab area, while providing operators with a safe observation and operating perspective. For example, a high-pressure water cannon platform 11 is constructed 2-3 meters above the top of the ore body 4 in the upper hanging wall of the goaf. It uses a welded I-beam frame (main beam spacing 1.2 meters), and the platform surface is covered with 8mm thick anti-slip steel plates (6 meters long × 2.5 meters wide). A 1.2-meter high guardrail is installed along the platform edge (guardrail spacing ≤ 15 cm), and a 0.8-meter wide passage is reserved on one side of the platform for connection to the roadway. The high-pressure water cannon 111 is a fixed PSZ-40 type (working pressure 15-25 MPa, spray angle adjustable from -20° to 60°, effective range ≥ 20 meters), fixed to a pre-set steel base in the middle of the platform using M20 expansion bolts (the base is welded to the platform frame, flatness error ≤ ±2 mm), ensuring no significant displacement of the cannon body during high-pressure spraying. (Refer to...) Figure 5 For example, the high-pressure water cannon 111 includes a latch 14 located at the bottom, a primary pressure valve 15 connected to the upper part of the latch 14, a solenoid valve 16 connected to the upper part of the primary pressure valve 15, a docking ring 17 connected to the upper part of the solenoid valve 16, and an intelligent controller 18 connected through the docking ring 17. The intelligent controller 18 is provided with a battery slot 19 and is connected to the water cannon body through a turret 22 provided on the support frame 20. The turret 22 is provided with a fastening bolt 21 for fixing the water cannon body. The water cannon body also includes an infrared rangefinder 23, a secondary pressure valve 24, a pressure gauge 25, a cannon barrel 26, and a cannon head 27.

[0031] S4. Lay the high-pressure water pipe 9 through the pipe shaft 10 to the high-pressure water platform 11, connect the high-pressure water pipe 9 to the fire hose 91, and connect the fire hose 91 to the high-pressure water cannon 111. Specifically, this step achieves pressure transmission and flexible connection from the pumping station to the operation terminal by constructing a complete high-pressure water delivery link. The pipe shaft 10, as a closed delivery channel, can protect the high-pressure water pipe 9 from external interference such as surrounding rock compression and falling rock impact, reducing pressure loss during long-distance delivery. The connection between the high-pressure water pipe 9 and the fire hose 91 combines rigidity and flexibility, taking into account both the pressure resistance of the pipeline and the flexibility of operation. The rigid high-pressure water pipe 9 ensures pressure stability during long-distance delivery, while the flexible fire hose 91 facilitates the adjustment of the water cannon spray angle on the platform according to the location of the slab ore. Finally, through the precise connection between the pipeline and the water cannon, it is ensured that the high-pressure water flow acts on the target ore body without leakage. For example, a 1.5-meter diameter vertical pipe shaft 10 (formed by smooth blasting, with 10 cm thick C20 concrete sprayed onto the shaft wall) is constructed between the upper and lower sections of the mining area. The high-pressure water pipes 9 are made of seamless steel pipes with a diameter of 65 mm (material Q235B, pressure rating ≥30 MPa), and are fixed inside the pipe shaft 10 using arc-shaped pipe clamps (spaced 2 meters apart). The clamps are connected to the shaft wall using expansion bolts. The pipeline extends from the top of the pipe shaft 10 to below the high-pressure water platform 11, and is then connected to a 75 mm diameter high-pressure fire hose 91 (pressure rating ≥25 MPa, length 15 meters, outer layer of wear-resistant rubber) via a DN65 (i.e., compatible with a nominal diameter of 65 mm) reducer. The joint is wrapped with three layers of PTFE sealing tape and secured with hose clamps. The other end of the fire hose 91 is connected to the inlet of the high-pressure water cannon 111 via a quick connector. After connection, a pressure test is performed (the test pressure is 1.2 times the working pressure, and it is considered qualified if there is no leakage after holding the pressure for 20 minutes).

[0032] S5. Lay geotextile along the goaf direction in the lower roadway and the ore extraction tunnel 6 within the goaf area. Specifically, this step achieves efficient collection and separation of crushed slab ore by setting up a flexible isolation layer. The geotextile can prevent ore from embedding into the roadway floor or mixing with waste rock, while reducing impact wear during ore falling and loss of ore powder, providing a clean and concentrated ore pile for subsequent ore extraction. For example, 400 g / m² long-filament geotextile is selected and laid along the goaf direction from the entrance of the lower roadway to the end of the ore extraction tunnel 6. During laying, the overlap width of adjacent geotextiles is ≥30 cm, and they are fixed by sewing with nylon rope (sewing spacing ≤20 cm). Geotextile pleats are added at roadway bends (leaving 50 cm for expansion) to prevent tearing.

[0033] S6. Using high-pressure water cannons 111, the ore in the goaf is gradually separated from top to bottom, allowing the ore to fall onto the geotextile. Specifically, this step uses the impact force of high-pressure water flow to achieve non-blasting crushing of the ore. The order from top to bottom allows gravity to assist the ore in falling, preventing the collapse of the upper unbroken ore body and burying the separated ore. The continuous impact of high-pressure water can peel off the ore layer by layer, which is especially suitable for dense slab layers formed by weathering and cementing. Compared with traditional blasting methods, it is safer, with no risk of shock waves and flying rocks, and can accurately control the crushing range, reducing disturbance to the surrounding rock. For example, when operating the high-pressure water cannon 111, first adjust the spray pressure to 12 MPa and start working from the top edge of the ore body 4 in the stope (10 meters away from the ore body surface), impacting at a 50° angle to loosen the edge ore; after the top ore falls to the geotextile, gradually reduce the working height (moving down 1.5 meters each time) and increase the pressure to 15-18 MPa to treat the central dense area, keeping the impact point spacing at 30 cm to ensure uniform crushing of the ore body (block size controlled below 30 cm); during the process, arrange for a dedicated person to observe the stability of the ore body to avoid large pieces of ore suddenly falling.

[0034] S7. Ore extraction by loader: This step achieves rapid recovery of crushed ore through mechanical transportation. The loader can adapt to narrow tunnel spaces and directly scoop ore from the geotextile, reducing secondary handling. Combined with the orderly crushing in S6, it enables continuous crushing-ore extraction operations, improving overall processing efficiency and preventing re-caking caused by long-term ore accumulation. For example, a WJ-1.5 electric loader (rated load capacity 1.5 tons) is selected. It enters the work area from the ore extraction tunnel 6 and scoops ore from far to near along the geotextile laying direction. The bucket insertion depth is controlled at 30-50 cm to prevent tearing the geotextile. When extracting ore, a "load and transport" mode is adopted to transfer the ore to the intermediate pass. The ore extraction rate is ≥80 tons per hour. During the operation interval, the fine mineral powder on the geotextile is cleaned to prevent accumulation and agglomeration, ensuring that the crushed ore can slide smoothly afterward.

[0035] This application addresses the stability of water source and power for high-pressure water operations by constructing a water storage tank 7 and a vertical multi-stage centrifugal pump station in S1, providing a continuous foundation for the entire system. In S2, the combination of the vertical multi-stage centrifugal pump 8 and valves resolves the issues of pressure regulation and equipment protection for high-pressure water flow, achieving precise pressure matching to the hardness of slab ore. In S3, the coordinated setup of high-pressure water pipes 9, fire hoses 91, and the work platform resolves the conflict between the flexibility of high-pressure water delivery and operational safety, ensuring precise application of water to the target ore body. In S4, the pipeline laying of the pipeline well 10 addresses the safety protection and pressure loss issues of high-pressure pipelines, guaranteeing terminal operating pressure. In S5, the laying of geotextile fabric solves the problem of collecting and separating crushed ore, reducing resource loss and subsequent cleanup costs. In S6, the layered operation of the high-pressure water cannon 111 addresses the efficiency and safety issues of non-blasting crushing of slab ore, avoiding the disturbance risks of traditional blasting. Finally, in S7, the continuous ore extraction by the loader solves the problem of secondary slab caking of ore accumulation, achieving efficient connection of the processing flow. The overall process, through the integrated application of high-pressure water technology, achieves safe, efficient, and low-disturbance treatment of slab deposits in the goaf of gold mines, balancing the needs of resource recovery and operational safety.

[0036] In some implementations, refer to Figure 3 In step S6, the operation time of the high-pressure water cannon 111 in separating the slab ore 4 in the stope shall not exceed 20 minutes. Specifically, this embodiment limits the single operation time of the high-pressure water cannon 111 in separating the slab ore 4 in the stope. The purpose is to avoid overheating and increased wear of the high-pressure equipment due to prolonged operation, while reducing the amount of wastewater generated per operation, reducing the impact of wastewater accumulation on subsequent processes, and ensuring the safety and continuity of the operation.

[0037] In some implementations, refer to Figure 3 In step S6, after the wastewater generated from the high-pressure water cannon 111's separation of the ore block 4 in the current operation is completely discharged through the lower middle drainage ditch, the next part of the ore block 4 separation operation will proceed. Specifically, it is required that the wastewater be completely discharged before proceeding to the next stage of the operation. The purpose is to prevent wastewater from accumulating in the work area, avoiding affecting ore collection (such as the ore mixing with accumulated water increasing the difficulty of ore extraction), and at the same time, to prevent wastewater from soaking the surrounding rock, which would reduce the stability of the rock mass and ensure the safety of the working environment.

[0038] In some implementations, refer to Figure 5In step S6, wastewater is discharged to the lower-middle section water tank via the ore outlet tunnel 6 and the inclined ramp 5 connecting the two levels. Specifically, the wastewater discharge path is defined, and the wastewater is led to the lower-middle section water tank through the ore outlet tunnel 6 and the inclined ramp 5, forming an orderly wastewater collection and treatment channel. This avoids wastewater from randomly flowing and polluting the work area, and at the same time facilitates centralized wastewater treatment (such as sedimentation and purification), which complies with the environmental protection and safety regulations for mining operations.

[0039] In some implementations, in step S6, the volume of the water tank is not less than 50 cubic meters.

[0040] In some implementations, in step S3, refer to Figure 3 and Figure 6 The high-pressure water cannon 111 is a PS series fixed high-pressure water cannon 111, which has a built-in pressurization system, enabling high-pressure spraying and remote operation. Specifically, this embodiment defines the type and function of the high-pressure water cannon 111. The selection of the PS series fixed high-pressure water cannon 111 is suitable for the high-pressure operation requirements of mines; the built-in pressurization system ensures that the spraying pressure meets the strength requirements for the separation of ore deposits in the stope; the remote operation function reduces the direct operation of personnel in dangerous areas and improves operational safety.

[0041] In some implementations, refer to Figure 2 In step S1, the water storage tank 7 is 15 meters long, 2 meters wide, and 1.3 meters high. Specifically, this embodiment clarifies the specific dimensions of the water storage tank 7. The design of 15 meters long, 2 meters wide, and 1.3 meters high is determined based on the water consumption requirements of high-pressure water operations. This design ensures a continuous water supply for the vertical multistage centrifugal pump 8 while avoiding increased construction costs and excessive space occupation due to an excessively large water storage tank 7, thus balancing water supply capacity and practicality.

[0042] In some implementations, refer to Figure 4 In step S1, waterproofing measures are taken for the bottom and side walls of the water storage tank 7. Specifically, this embodiment defines the waterproofing requirements for the water storage tank 7. Taking waterproofing measures for the bottom and side walls (such as laying waterproof membrane, applying waterproof coating, etc.) can prevent water leakage, avoid water waste, and at the same time prevent seepage from affecting the stability of the surrounding rock mass or causing water accumulation in the tunnel, ensuring the efficient operation of the water supply system.

[0043] In some implementations, refer to Figure 4In step S2, the foundation for the vertical multistage centrifugal pump 8 is a pit measuring 1.0 meter long × 1.0 meter wide × 0.6 meters deep. Four 22 mm diameter round steel bars are pre-embedded in the pit as embedded parts, and the foundation is poured with C25 grade concrete. Specifically, this embodiment specifies the foundation parameters for the vertical multistage centrifugal pump 8. The specific dimensions of the pit, the setting of the embedded parts, and the use of C25 concrete are all to ensure the stability of the equipment installation, prevent displacement or damage to the pump due to vibration during operation, ensure its long-term stable operation, and meet the power supply requirements of the high-pressure water system.

[0044] In some embodiments, in step S1, the relevant chamber supporting facilities include a frequency converter cabinet chamber, the floor of which is at least 0.5 meters higher than the pump room floor. Specifically, this embodiment limits the setting requirements for the frequency converter cabinet chamber; the floor of the frequency converter cabinet chamber is at least 0.5 meters higher than the pump room floor. This effectively prevents water accumulation in the pump room from entering the chamber and damaging electrical equipment, ensures the normal operation of the frequency converter cabinet (used to regulate the pump speed and pressure), and ensures stable and controllable pressure in the high-pressure water system.

[0045] In some implementations, refer to Figures 1 to 6 A method for treating sludge deposits in goaf areas using high-pressure water technology, the specific steps of which are as follows: Step 1: In the upper middle section of the mining area, select the nearest roadway 12 as the water storage tank 7, and arrange the high-pressure pump station and frequency converter cabinet chamber near the water storage tank 7.

[0046] Step 2: Install a vertical multistage centrifugal pump 8 outside the water storage tank 7, and connect the butterfly valve 12 and check valve 13 to the pipeline of the water storage tank 7 and the water pump outlet.

[0047] Step 3: Connect the high-pressure water pipe 6 to the fire hose 8, install the high-pressure water cannon 111 on the high-pressure water platform 11 in the mining area, and after it is firmly fixed, conduct high-pressure water testing.

[0048] Step 4: The high-pressure water pipe 9 is laid from the pipeline well 10 to the high-pressure water platform 11 in the mining area, and the high-pressure water is used to separate the slab ore from the mining area from top to bottom.

[0049] Step 5: Lay a layer of geotextile along the goaf direction in the lower roadway and the ore exit roadway 6. The ore washed down by the high-pressure water cannon 111 will fall onto the geotextile to prevent the loss of fine ore.

[0050] Step Six: After all the slab ore in the goaf has been processed, a loader is used to transport the ore from the ore passage through ramp 5 to the lower middle section ore chute, and then lift it to the surface through a cage in the vertical shaft.

[0051] The roadway water storage tank 7 is 15 meters long, 2 meters wide, and 1.3 meters high. It is used to treat wastewater generated from the sludge in the goaf. The wastewater first flows through the ore exit roadway 6 to the inclined ramp 5, and then flows into the water tank through the next intermediate water ditch.

[0052] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be covered within the scope of protection of the present invention.

[0053] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A method for treating sludge deposits in goaf areas of gold mines based on high-pressure water technology, characterized in that, include: S1. In the middle section above the mining area, select a roadway with a relatively close location to arrange a water storage tank (7), and build a vertical multi-stage centrifugal pump (8) station and related chamber supporting facilities in the surrounding area. S2. Install a vertical multistage centrifugal pump (8) outside the water storage tank (7), and install a butterfly valve (12) and a check valve (13) at the outlet of the vertical multistage centrifugal pump (8); S3. Set up a high-pressure water platform (11) in the working area and install a high-pressure water cannon (111) in the high-pressure water platform (11); S4. Lay the high-pressure water pipe (9) through the pipe well (10) to the high-pressure water platform (11), connect the high-pressure water pipe (9) to the fire hose (91), and connect the fire hose (91) to the high-pressure water cannon (111). S5. Lay geotextile along the goaf direction in the lower roadway and ore passageway (6) of the goaf area; S6. Use high-pressure water cannon (111) to gradually separate the slab ore (4) from top to bottom, so that the ore falls onto the geotextile; S7. The shovel loader removes the ore; In S3, a high-pressure water platform (111) is built 2-3 meters away from the top of the slab ore (4) in the upper plate of the goaf. The platform is constructed with a welded frame of I-beams and covered with anti-slip steel plates. A 0.8-meter-wide passage is reserved on one side of the platform to connect with the roadway. The high-pressure water cannon (111) is fixed to the steel base in the middle of the platform by M20 expansion bolts. The steel base is welded and fixed to the platform frame to ensure that the cannon body does not have obvious displacement when spraying under high pressure. In S4, a vertical pipe well (10) with a diameter of 1.5 meters is constructed between the upper and lower middle sections of the mining area. The high-pressure water pipe (9) is made of seamless steel pipe with a diameter of 65 mm. It is fixed by an arc-shaped pipe clamp inside the pipe well (10). The pipe clamp is connected to the well wall by expansion bolts. After the pipe extends from the top of the pipe well (10) to the bottom of the high-pressure water platform (11), it is connected to the fire hose (91) through a reducing joint. The joint is wrapped with three layers of polytetrafluoroethylene sealing tape and tightened with hose clamps. The other end of the fire hose (91) is connected to the inlet of the high-pressure water cannon (111) through a quick connector.

2. The method for treating sludge deposits in goaf areas of gold mines based on high-pressure water technology according to claim 1, characterized in that, In step S6, the operation time for using the high-pressure water cannon (111) to separate the slab ore (4) in the mining area shall not exceed 20 minutes.

3. The method for treating sludge deposits in goaf areas of gold mines based on high-pressure water technology according to claim 2, characterized in that, In step S6, after the wastewater generated by the high-pressure water cannon (111) in this operation to separate the slab ore in the mining area is completely discharged through the lower middle section water ditch, the next part of the mining area slab ore (4) separation operation will be carried out.

4. A method for treating sludge deposits in goaf areas of gold mines based on high-pressure water technology, as described in claim 3, is characterized in that... In step S6, the wastewater is discharged to the lower middle section inner water tank through the mine exit tunnel (6) and the inclined ramp (5) connecting the two layers.

5. A method for treating sludge deposits in goaf areas of gold mines based on high-pressure water technology according to claim 4, characterized in that, In step S6, the water tank volume is not less than 50 cubic meters.

6. A method for treating sludge deposits in goaf areas of gold mines based on high-pressure water technology according to claim 3, characterized in that, In step S3, the high-pressure water cannon (111) is a PS series fixed high-pressure water cannon with a built-in pressurization system to realize high-pressure spraying and remote operation.

7. A method for treating sludge deposits in goaf areas of gold mines based on high-pressure water technology according to claim 1, characterized in that, In step S1, the water storage tank (7) is 15 meters long, 2 meters wide, and 1.3 meters high.

8. A method for treating sludge deposits in goaf areas of gold mines based on high-pressure water technology according to claim 7, characterized in that, In step S1, the bottom and side walls of the water storage tank (7) are waterproofed.

9. A method for treating sludge deposits in goaf areas of gold mines based on high-pressure water technology according to claim 1, characterized in that, In step S2, the foundation of the vertical multistage centrifugal pump (8) is a pit with a length of 1.0 meter × width of 1.0 meter × depth of 0.6 meters. Four round steel bars with a diameter of 22 mm are pre-embedded in the pit as embedded parts. The foundation is poured with C25 grade concrete.

10. A method for treating sludge deposits in goaf areas of gold mines based on high-pressure water technology according to claim 1, characterized in that, In step S1, the relevant chamber supporting facilities include a frequency converter cabinet chamber, the floor of which is more than 0.5 meters higher than the pump room floor.

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