Underground intelligent paste slurry filling system

Abstract

The invention discloses an underground intelligent paste slurry filling system. The system is composed of a filling demand end, an intelligent control end and a filling execution end. The filling demand end calculates the total amount, proportion and filling opportunity of paste slurry according to demand information of a goaf to be filled, and the intelligent control end generates a control instruction according to the total amount, proportion and filling opportunity of the paste slurry and transmits the control instruction to the remote control devices corresponding to the equipment start-stop devices and the pipeline valves through the signal receiving and transmitting device. The filling execution end comprises an integrated pulping machine, a double-layer stirring machine, a filling industrial pump and a conveying pipeline, and slurry is prepared and conveyed according to instructions. Wherein the integrated pulping machine integrates multiple modules, the double-layer stirring machine is unique in structure, and the raw material ratio is accurately controlled through a gravity sensing type bearing platform. The system solves the conveying and control efficiency problem of a traditional filling system, achieves intelligent, efficient and accurate filling, improves the filling efficiency and quality, and adapts to complex and changeable goaf conditions.

Description

Technical Field

[0001] This invention relates to the field of mine goaf filling technology, and more particularly to an intelligent underground paste slurry filling system. Background Technology

[0002] Currently, in mining operations, to prevent the collapse of goaf areas, paste slurry is commonly used for backfilling. Traditional underground mine paste slurry backfilling systems typically place the relevant facilities on the surface and then transport the paste slurry over a long distance to the goaf area to be filled. However, this method has many drawbacks: Transportation issues: Due to the long transportation routes, the paste slurry is prone to coagulation or segregation in the transportation pipelines, leading to pipe blockage. Once blockage occurs, maintenance is extremely complicated and inconvenient, not only consuming a lot of manpower and resources, but also seriously affecting the normal progress of the filling work.

[0003] Control efficiency issues: Many existing filling systems rely on manual start-stop systems for their control equipment or pipeline connections, resulting in low automation and control efficiency. This not only affects the overall operational efficiency of the filling system but also makes it difficult to guarantee filling quality, failing to meet the demands of modern mines for efficient and precise mining.

[0004] Insufficient Intelligentization: Although some mines have implemented intelligent systems for paste filling, the facilities and equipment are still primarily located on the surface. The problem of excessively long slurry delivery pipelines remains unresolved, and slurry coagulation or segregation causing pipe blockages persists. Furthermore, because the filling of the goaf is underground, while the filling system facilities, equipment, and intelligent control center are on the surface, the long distances for command signal exchange and transmission, coupled with untimely information transmission, negatively impact filling efficiency and quality. Simultaneously, repair and maintenance work faces numerous difficulties when signal transmission cables or devices malfunction.

[0005] In summary, existing filling systems and intelligent filling systems generally suffer from problems such as low slurry conveying efficiency, poor conveying quality, and low control efficiency, ultimately resulting in low filling efficiency or poor filling quality. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to address the above-mentioned shortcomings of the existing downhole paste filling system, and to provide an intelligent downhole paste slurry filling system that can improve filling efficiency and ensure filling quality, so as to realize efficient, timely and accurate intelligent control of the paste filling system, improve the efficiency of paste slurry preparation and transportation, and provide diversified options for goaf filling.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: a downhole intelligent paste slurry filling system is constructed, comprising a filling demand end that calculates the paste slurry demand information of the corresponding goaf based on the input goaf information, an intelligent control end that generates and outputs control commands according to preset parameters and preset processes based on the paste slurry filling demand information, and a filling execution end that prepares paste slurry according to the control commands of the intelligent control end and delivers it to the goaf to be filled in real time; The filling demand end calculates the total amount of paste slurry required based on the input volume of the goaf to be filled, calculates the required proportion of paste slurry based on the input engineering geological parameters of the goaf to be filled, and calculates the filling timing of the goaf to be filled based on the relative position of the goaf to be filled in the mining area, ore layer and intermediate section. The filling execution end includes an integrated slurry preparation machine for making paste slurry, a double-layer mixer for fully mixing the paste slurry, a filling industrial pump for pressurizing the prepared paste slurry, and a conveying pipeline for transporting the pressurized paste slurry to each goaf to be filled. The intelligent control terminal includes an intelligent control host, a signal transceiver device, and a remote control device. The intelligent control host calculates and generates control commands according to preset parameters and preset procedures based on the paste slurry demand information delivered by the filling demand end. The signal transceiver device sends the control commands to the remote control devices located at each device in the filling execution end. The remote control devices can control the start and stop of each module and device according to the control commands.

[0008] Furthermore, the integrated slurry preparation machine includes a tailings slurry preparation module for producing slurry, a thickening chamber for concentrating the slurry from the tailings slurry preparation module and conveying it to a double-layer mixer, a cementing agent module located at the top of the double-layer mixer for adding cementitious materials to the slurry, and an additive module located at the top of the double-layer mixer for adding admixtures to the slurry. The tailings slurry preparation module is located on the surface, and the double-layer mixer is located underground. The tailings slurry preparation module, cementing agent module, additive module, and double-layer mixer within the integrated slurry preparation machine are controlled to start and stop by the remote control device. This reduces the conveying distance of the paste slurry underground, lowers the risk of blockage and segregation during the conveying process, and also facilitates close integration with subsequent filling operations, improving overall filling efficiency.

[0009] Furthermore, the tailings slurry preparation module includes a tailings storage point for storing tailings slurry, a sedimentation and thickening tank for concentrating and settling the tailings slurry to form pumpable slurry, a slurry delivery pump for pressurizing the slurry, and a slurry delivery pipeline for delivering the pressurized slurry to the thickening chamber; the slurry delivery pump is controlled by the remote control device to start, stop, or close; all parts work together, reducing human intervention and potential risks in intermediate links, and improving the operating efficiency and reliability of the entire filling system.

[0010] Furthermore, the integrated pulping machine also includes an aggregate addition module for adding aggregate to the slurry. The aggregate addition module is located on top of the double-layer mixer and is controlled to start and stop by the remote control device. This achieves automation and continuity of the pulping process, reduces manual intervention, lowers the probability of errors, and improves the operational stability and reliability of the entire filling system. By flexibly controlling the addition of aggregate, the formula of the filling material can be quickly adjusted, allowing the filling material to better adapt to various complex and changing geological conditions, thereby improving the quality and efficiency of the filling operation.

[0011] Furthermore, the double-layer mixer includes a mixing chamber, a mixing head positioned within the mixing chamber, and a mixing motor that drives the mixing head to rotate. The mixing chamber includes an upper mixing zone and a lower discharge zone separated by a conical partition, a ball valve positioned at the center of the conical partition, a receiving plate positioned at the top of the upper mixing zone, and a discharge gate valve positioned at the bottom of the lower discharge zone. The mixing head is rotatably positioned within the upper mixing zone. The mixing motor, the ball valve, and the discharge gate valve are controlled by the remote control device to start / stop or open / close. The double-layer structure allows the mixer to discharge material in the lower discharge zone while the upper mixing zone prepares for mixing the next batch of material, greatly improving the mixer's working efficiency, ensuring the continuous operation of the entire filling system, improving filling efficiency, and shortening the construction period.

[0012] Furthermore, the receiving plate is equipped with a gravity-sensing platform connected to the intelligent control host. The gravity-sensing platform controls the opening and closing of the corresponding discharge ports of the thickening silo, the gelling material module, and the additive module in real time through a remote control device based on various component ratio information transmitted from the intelligent control host. The gravity-sensing platform can accurately monitor whether the discharge volume of each module meets the set ratio requirements based on various component ratio information transmitted from the intelligent control host, and can control the opening and closing of the corresponding discharge ports of the thickening silo, the gelling material module, and the additive module in real time through a remote control device to adjust the discharge volume in a timely manner, thereby ensuring the quality stability and performance consistency of the paste slurry.

[0013] Furthermore, the remote control device includes start-stop devices respectively installed on the tailings conveying pump, integrated slurry mixer, double-layer mixer, and filling industrial pump, as well as multi-way valves and check valves installed on the conveying pipeline and slurry conveying pipeline; by remotely and uniformly controlling the start and stop of each device, it helps to achieve coordinated operation of the entire filling system, reduces the complexity and labor intensity of manual operation, and improves the convenience and accuracy of operation.

[0014] Furthermore, the signal transceiver includes a wired communication line connecting the intelligent control host and the corresponding remote control device via a wired communication cable, and a wireless communication line connecting the intelligent control host and the corresponding remote control device via a wireless directional base station (AP).

[0015] Furthermore, the remote control devices corresponding to the tailings conveying pump, integrated slurry mixer, double-layer mixer, filling industrial pump, and check valves on the slurry conveying pipeline are connected to the intelligent control host via wired communication lines; the remote control devices corresponding to the multi-way valves and check valves on the conveying pipeline are connected to the intelligent control host via wireless communication lines. For long-distance signal transmission, the use of wired communication lines can effectively reduce interference and ensure accuracy; for underground signal transmission, wireless communication lines are preferred, which can be flexibly adjusted according to the progress of the project, adapt to the complexity of the underground spatial layout, and improve the scalability and adaptability of the system.

[0016] The intelligent downhole paste slurry filling system of this invention has the following beneficial effects: By setting the system to include a filling demand end, an intelligent control end, and a filling execution end, the system can take multi-dimensional information from the filling demand end (filling demand quantity, filling demand intensity, and filling timing, etc.) as input, and through analysis and calculation by the intelligent control end, accurately control the filling execution end to achieve efficient and timely intelligent filling. Compared with traditional filling system architecture, this is more concise and efficient. By setting an integrated slurry preparation machine downhole, most of the paste slurry production process is integrated downhole, making the slurry preparation process more compact and efficient, reducing material transfer and potential losses in intermediate stages, and improving the efficiency and quality stability of slurry preparation. The system can flexibly adjust the paste slurry demand information and control commands according to the specific information of different goaf areas, thereby adapting to various complex and changing goaf conditions; the modular design of each part facilitates system expansion and downhole relocation according to project progress, possessing good flexibility and adaptability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 The diagram shown is a schematic representation of a preferred embodiment of the intelligent paste slurry filling system for downhole applications according to the present invention. Figure 2 The figure shown is a system block diagram of a preferred embodiment of the intelligent paste slurry filling system for downhole applications according to the present invention. Figure 3The diagram shown is a schematic representation of the integrated slurry preparation machine in a preferred embodiment of the intelligent downhole paste slurry filling system of the present invention. Figure 4 As shown Figure 3 Top view; Figure 5 The diagram shown is a schematic representation of the double-layer mixer in a preferred embodiment of the intelligent paste slurry filling system for wells according to the present invention. Figure 6 As shown Figure 5 Top view.

[0019] Filling demand end-1, intelligent control end-2, filling execution end-3, integrated pulping machine-4, double-layer mixer-5, filling industrial pump-6, conveying pipeline-7, tailings slurry module-8, thickening bin-9, cementitious material bin-10, screw feeder-11, tailings storage point-12, sedimentation and thickening tank-13, tailings conveying pump-14, slurry conveying pipeline-15, upper mixing zone-18, lower discharge zone-19, ball valve-20, receiving plate-21, discharge gate valve-22, three-way valve-23, intelligent control host-24, wired communication cable-25, wireless directional base station-26, one-way valve-27, goaf to be filled-28, admixture bin-29, conical baffle-30. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] like Figure 1 , 2 As shown, in a preferred embodiment of the intelligent paste slurry filling system for downholes according to the present invention, it mainly includes a filling demand end 1, an intelligent control end 2, and a filling execution end 3. The filling demand end is mainly used to calculate the paste slurry demand information of the corresponding goaf based on the input goaf information. The intelligent control end is mainly used to generate and output control commands according to preset parameters and preset processes based on the paste slurry demand information. The filling execution end is mainly used to prepare paste slurry according to the control commands of the intelligent control end and deliver it to the goaf 28 to be filled in real time.

[0022] The preferred configuration for the filling demand side may include an input device and a calculation module (not shown in the figure). The input device is mainly used to input goaf information into the calculation module, including the volume, location, and engineering geological conditions of each goaf to be filled. This goaf information can be input into the calculation module in batches as needed, or it can be input into the calculation module all at once according to the overall distribution of the goafs. The calculation module calculates the paste slurry demand information of the goaf to be filled based on the input goaf information and outputs the following three signals to the intelligent control terminal: (1) (2) (3) In equation (1), Q represents the required amount of paste slurry, and V represents the volume of the goaf to be filled. Specifically, the original data of the volume V of the goaf to be filled can be manually collected and input, or the goaf can be scanned and modeled using a high-precision three-dimensional laser scanning device to accurately obtain the volume data of the goaf. According to different mining methods and goaf shapes, corresponding volume calculation models are adopted to ensure the accurate calculation of the amount of paste slurry. The calculation module calculates the required amount of paste slurry based on the input volume information of the goaf to be filled and generates a signal f1 to send to the intelligent control terminal.

[0023] In equation (2), M represents the required strength of the filling material, which is determined by the engineering geological conditions of the goaf (such as rock hardness, joint and fissure development, and groundwater permeability). Specifically, it is determined by the stability F of the top and side plates of the goaf, and indirectly by the engineering geological conditions g and hydrogeological conditions h at the top and side plates. By using ground-penetrating radar, core drilling, and other means to understand the engineering geological conditions in detail, and by using professional geotechnical mechanics analysis software to simulate the stress conditions of the goaf under different working conditions, a reasonable filling material strength and corresponding material ratio can be determined. Specifically, the engineering geological conditions g and hydrogeological conditions h can be determined by on-site manual or video collection of relevant information and then analyzed and judged. The calculation module selects the matching filling material strength M based on the engineering geological conditions of the goaf to be filled, applies the empirical data of the existing model, and then determines the required ratio of paste slurry in the goaf to be filled based on the information stored in the database, and generates a signal f2 to send to the intelligent control terminal.

[0024] In equation (3), T i The timing of filling the goaf area to be filled in this project, T i-1 represents the filling timing of the adjacent or previous goaf. Specifically, an overall mining progress model of the mining area can be established, combined with real-time monitoring of the filling progress of adjacent goafs, and intelligent algorithms can be used to predict the optimal filling timing for this goaf, avoiding safety hazards or resource waste caused by untimely or premature filling. The calculation module determines the filling timing based on the location of each goaf to be filled and generates a signal f3 to send to the intelligent control terminal.

[0025] The filling execution unit mainly includes an integrated slurry mixer (4), a double-layer mixer (5), a filling industrial pump (6), and a conveying pipeline (7). The integrated slurry mixer is mainly used to prepare the paste slurry; the double-layer mixer is used to thoroughly mix the paste slurry; the filling industrial pump is used to pressurize the prepared paste slurry; and the conveying pipeline connects the filling industrial pump to each goaf to be filled, used to transport the pressurized paste slurry to each goaf. Three-way or four-way valves are installed at the branches of the conveying pipeline, and a one-way valve is installed at the end of the conveying pipeline at the goaf to be filled, controlled by control commands sent from the intelligent control terminal.

[0026] In this preferred embodiment, the integrated pulping machine preferably includes a tailings pulping module 8, a thickening bin 9, a cementitious material module, and an additive module. The tailings pulping module is located on the ground and mainly includes a tailings storage point 12, a sedimentation and thickening tank 13, a tailings transfer pump 14, and a slurry transfer pipeline 15, connected in sequence. The tailings storage point mainly stores the tailings slurry temporarily stored after mineral processing in the concentrator; the sedimentation and thickening tank is mainly used to increase the low concentration of the original tailings slurry to a mass concentration of approximately 20% through water thickening, thereby achieving efficient and economical tailings slurry transportation; the tailings transfer pump is mainly used to pressurize the slurry and is located at the beginning of the slurry transfer pipeline; the slurry transfer pipeline is mainly used to transport the slurry to the thickening bin. To facilitate pressurized transportation, the moisture content of the transported slurry is much higher than that of the paste slurry used for filling. The thickening bin is mainly used to further reduce the moisture content of the slurry to meet the requirements of the paste slurry used for filling. In this preferred embodiment, two thickening chambers are preferably arranged side by side downhole for alternating pulping, so as to continuously deliver paste slurry to the double-layer mixer.

[0027] In this preferred embodiment, the gelling material module is located at the top of the double-layer mixer and is mainly used to add gelling material to the paste slurry delivered from the thickening silo. The additive module is also located at the top of the double-layer mixer and is used to add admixtures to the paste slurry delivered from the thickening silo. Preferably, the gelling material module includes a gelling material silo 10 and a screw feeder 11 located in the center of the gelling material silo. A gate controlled by an intelligent control terminal is located at the bottom of the gelling material silo. Preferably, the additive module includes an admixture silo 29 and a screw feeder (not shown in the figure) located in the center of the admixture silo. A ball valve controlled by an intelligent control terminal is located at the bottom of the admixture silo. The gelling material silo contains a sufficient amount of gelling material; the admixture silo may include multiple silos, each containing various admixtures, such as accelerators, retarders, early-strength agents, and air-entraining agents. Based on the ratio and timing requirements calculated by the filling demand side, the intelligent control terminal controls the gel material module and additive module of the integrated pulping machine to add appropriate amounts of gel material and additives to the paste slurry in order to prepare paste slurry that meets the current needs of the goaf to be filled.

[0028] In this preferred embodiment, the integrated slurry mixer further includes an aggregate addition module (not shown in the figure). This aggregate addition module is connected to the top of the double-layer mixer and is used to add aggregate to the paste slurry of the double-layer mixer to enhance the strength of the entire filling slurry and meet the filling needs of goaf areas with poor geological conditions. Specifically, the aggregate addition module can be a mobile crusher or a small stone crushing production line installed underground, which directly transports crushed stone aggregate to the top of the double-layer mixer via a conveyor belt.

[0029] In this preferred embodiment, the double-layer mixer preferably configured with a filling execution end includes a mixing chamber 17, a mixing head (not shown in the figure) positioned at the center of the mixing chamber, and a mixing motor (not shown in the figure) driving the mixing head to rotate. The mixing chamber includes an upper mixing zone 18 and a lower discharge zone 19 separated by a conical partition 30, a ball valve 20 positioned at the center of the conical partition, a receiving plate 21 positioned at the top of the upper mixing zone, and a discharge gate valve 22 positioned at the bottom of the lower discharge zone. The mixing head is rotated and positioned within the upper mixing zone. The mixing motor, ball valve, and discharge gate valve are controlled by a remote control device to start / stop or open / close. The double-layer structure allows the mixer to discharge material in the lower discharge zone while the upper mixing zone prepares for the mixing of the next batch of material, greatly improving the mixer's working efficiency, ensuring the continuous operation of the entire filling system, increasing filling efficiency, and shortening the construction period. In this preferred embodiment, a three-way valve 23 is preferably installed at the end of the conveying pipeline entering the goaf. Before the paste slurry enters the goaf to be filled, the three-way valve switches the filling points in the goaf to achieve rapid filling of slurry at multiple points, thereby achieving good roof connection by filling the goaf with paste slurry. In addition, flow meters are preferably installed at the outlet end of the tailings conveying pump and the outlet end of the filling industrial pump to detect the accurate metering of paste slurry or mineral slurry in the pipeline.

[0030] In this preferred embodiment, the intelligent control terminal performs internal analysis and calculation based on various signals regarding the paste slurry demand information transmitted from the filling demand terminal, and then outputs control commands to the filling execution terminal. The preferred intelligent control terminal mainly includes an intelligent control host 24, a signal transceiver (not shown in the figure), and a remote control device (not shown in the figure). The intelligent control host, as the core of the entire intelligent control terminal, is mainly used for analysis and calculation to generate control commands, which are then transmitted to the remote control device via the signal transceiver. The intelligent control host preferably uses a high-performance industrial computer to ensure powerful data processing and analysis capabilities; its built-in preset algorithm program can quickly process large amounts of data transmitted from the filling demand terminal, and can also perform self-learning and optimization adjustments based on historical filling data models and real-time feedback information to cope with complex and changing downhole filling conditions. This industrial computer is preferably located downhole near the double-layer mixer, but can also be located in other stable surrounding rock chambers as needed.

[0031] The signal transceiver is mainly used to send control commands generated by the intelligent control host to the corresponding remote control device. This includes a wired communication line connecting the intelligent control host and the corresponding remote control device via a wired communication cable 25, and a wireless communication line connecting the intelligent control host and the corresponding remote control device via a wireless directional base station 26 (AP). Depending on the complexity of the paths within the mining area, multiple interconnected wireless directional base stations (APs) can be set up.

[0032] The remote control device includes check valves 27, three-way valves 23, and start / stop devices installed at various equipment points on the filling execution end, used to control the start and stop of operation of each module and equipment. For command transmission or information exchange between various equipment or control points underground (such as check valves, three-way valves, and flow meters), wireless directional base stations (APs) are used to realize wireless signal transmission and interaction between the intelligent control end and the filling execution end; while for the tailings transfer pump on the surface, considering the long distance from the control center of the intelligent control end and the limitations of the surface environment, wired communication cables are preferred to realize signal transmission and exchange with the tailings transfer pump on the surface.

[0033] like Figure 1 , 2As shown in Figures 3 and 4, when this system performs paste filling on a batch of goaf areas 28 to be filled underground, it first uses the input device at the filling demand end to input the goaf volume, engineering geological conditions, and relative position of the goaf in the mining area or intermediate section of the first goaf area 28 to be filled into the calculation module for calculation and analysis. This yields filling demand information such as the required amount of paste slurry, the paste slurry mix ratio, and the timing of filling. The above demand information is then input into the intelligent control host 24 located in the intelligent control terminal in the underground space or chamber.

[0034] The intelligent control host 24 at the intelligent control terminal analyzes demand information and generates control commands. These commands are transmitted via a wireless communication line including a wireless directional base station (AP) 14 to the corresponding signal transceiver device of the underground equipment, and via a wired communication line including a wired communication cable 25 to the corresponding signal transceiver device of the tailings conveying pump on the surface. The signal transceiver device, in conjunction with a remote control device, controls the corresponding equipment, check valve, or three-way valve. The tailings slurry at the tailings storage point is concentrated in the sedimentation and thickening tank 13, then pumped by the tailings conveying pump 14 through the slurry conveying pipeline 15 to the thickening chamber 9 of the integrated slurry mixer 4 located underground. After alternating thickening in two thickening chambers, it enters the double-layer mixer 5. Cement or cementitious materials in the cementitious material silo 42 of the integrated slurry mixer 4 are fed into the double-layer mixer 5 via a screw feeder 11. Under normal circumstances, the double-layer mixer 5 can mix tailings slurry and cement or cementitious material to form a paste slurry, which is then pressurized by the filling industrial pump 6 and transported to the goaf to be filled via the slurry conveying pipeline 15. When there are special requirements for the paste slurry or filling material, the intelligent control host can generate relevant instructions based on the demand information. The wireless directional base station (AP) 14 sends instructions to the remote control device corresponding to the additive module or aggregate addition module to control the specified additive in the admixture silo to enter the double-layer mixer 5 via the screw feeder; or control the aggregate addition module to crush the crushed stone and then transport the crushed stone to the double-layer mixer via the conveyor belt to change the properties of the paste slurry or improve the strength of the filling material.

[0035] When the paste slurry is filled into the goaf to be filled, the intelligent control host first opens the one-way valve 27 corresponding to the goaf to be filled through the corresponding remote control device, and then controls the three-way valve corresponding to the goaf to open, so as to realize efficient and high-quality grouting into the goaf from multiple points. After the goaf is filled, the one-way valve 27 corresponding to the goaf is closed in time, and the one-way valve 27 corresponding to the next goaf to be filled is opened. The host analyzes the goaf volume, engineering geological conditions of the goaf, and relative position of the goaf in the mining area or intermediate section, and obtains the filling demand information such as the total amount of paste slurry to be filled in the next goaf, the paste slurry ratio, and the filling timing. The above information is input into the intelligent control host 24 located at the intelligent control end, and the above process is repeated. Finally, intelligent and efficient filling of all goafs to be filled is achieved.

[0036] Based on the embodiments of the present invention, any modifications, equivalent substitutions, improvements, etc., made by all other embodiments obtained by those skilled in the art without creative effort should be included within the protection scope of the present invention.

Claims

1. A downhole intelligent paste slurry filling system, characterized in that, The system includes a filling demand end that calculates the required paste slurry for the corresponding goaf based on the input goaf information; an intelligent control end that generates and outputs control commands according to preset parameters and preset processes based on the required paste slurry; and a filling execution end that prepares paste slurry according to the control commands of the intelligent control end and delivers it to the goaf to be filled in real time. The filling demand end calculates the total amount of paste slurry required based on the input volume of the goaf to be filled, calculates the required proportion of paste slurry based on the input engineering geological parameters of the goaf to be filled, and calculates the filling timing of the goaf to be filled based on the relative position of the goaf to be filled in the mining area, ore layer and intermediate section. The filling execution end includes an integrated slurry preparation machine for making paste slurry, a double-layer mixer for fully mixing the paste slurry, a filling industrial pump for pressurizing the prepared paste slurry, and a conveying pipeline for transporting the pressurized paste slurry to each goaf to be filled. The intelligent control terminal includes an intelligent control host, a signal transceiver device, and a remote control device. The intelligent control host calculates and generates control commands according to preset parameters and preset procedures based on the paste slurry demand information delivered by the filling demand end. The signal transceiver device sends the control commands to the remote control devices located at each device in the filling execution end. The remote control devices can control the start and stop of each module and device according to the control commands.

2. The downhole intelligent paste slurry filling system according to claim 1, characterized in that, The integrated pulping machine includes a tailings pulping module for producing slurry, a thickening chamber for concentrating the slurry from the tailings pulping module and conveying it to a double-layer mixer, a cementing module for adding cementitious materials to the slurry from the top of the double-layer mixer, and an additive module for adding admixtures to the slurry from the top of the double-layer mixer. The tailings pulping module is located on the surface, and the double-layer mixer is located underground. The tailings pulping module, cementing module, additive module, and double-layer mixer in the integrated pulping machine are controlled to start and stop by the remote control device.

3. The downhole intelligent paste slurry filling system according to claim 2, characterized in that, The tailings slurry preparation module includes a tailings storage point for storing tailings slurry, a sedimentation and thickening tank for concentrating and settling the tailings slurry to form pumpable slurry, a slurry delivery pump for pressurizing the slurry, and a slurry delivery pipeline for delivering the pressurized slurry to the thickening chamber; the slurry delivery pump is controlled by the remote control device to start, stop, or close.

4. The downhole intelligent paste slurry filling system according to claim 2, characterized in that, The integrated pulping machine also includes an aggregate adding module for adding aggregate to the slurry. The aggregate adding module is connected to the top of the double-layer mixer and is controlled to start and stop by the remote control device.

5. The intelligent downhole paste slurry filling system according to claim 1, characterized in that, The double-layer mixer includes a mixing chamber, a mixing head positioned within the mixing chamber, and a mixing motor that drives the mixing head to rotate. The mixing chamber includes an upper mixing zone and a lower discharge zone separated by a conical partition, a ball valve located at the center of the conical partition, a receiving plate located at the top of the upper mixing zone, and a discharge gate valve located at the bottom of the lower discharge zone. The mixing head is rotatably positioned within the upper mixing zone. The mixing motor, the ball valve, and the discharge gate valve are controlled by the remote control device to start, stop, or open / close.

6. The intelligent downhole paste slurry filling system according to claim 5, characterized in that, The receiving plate is equipped with a gravity-sensing support platform connected to the intelligent control host. The gravity-sensing support platform controls the opening and closing of the corresponding discharge ports of the thickening silo, the gelling material module, and the additive module in real time through a remote control device based on the various component ratio information transmitted by the intelligent control host.

7. The downhole intelligent paste slurry filling system according to claim 1, characterized in that, The remote control device includes start / stop devices respectively installed on the tailings conveying pump, integrated slurry mixer, double-layer mixer, and filling industrial pump, as well as multi-way valves and check valves installed on the conveying pipeline and slurry conveying pipeline.

8. The intelligent downhole paste slurry filling system according to claim 7, characterized in that, The signal transceiver includes a wired communication line connecting the intelligent control host and the corresponding remote control device via a wired communication cable, and a wireless communication line connecting the intelligent control host and the corresponding remote control device via a wireless directional base station.

9. The downhole intelligent paste slurry filling system according to claim 8, characterized in that, The remote control devices corresponding to the tailings conveying pump, integrated slurry mixer, double-layer mixer, filling industrial pump, and check valve on the slurry conveying pipeline are connected to the intelligent control host via wired communication lines; the remote control devices corresponding to the multi-way valve and check valve on the conveying pipeline are connected to the intelligent control host via wireless communication lines.

Images