Intelligent instant preparation filling system and method for filling slurry

Abstract

The invention relates to the technical field of mine filling, in particular to an intelligent instant filling system and method for filling slurry, and the system comprises a flocculant preparation and addition device, a tailing bin, a deep-cone thickener, an overflow water tank, a raw material bin, a raw material mixing bin, a dynamic powder concentrator, a cementing powder bin, a stirrer, a filling industrial pump and a filling pipeline. The system also comprises a digital twin platform which specifically comprises an intelligent thickening module, a grading-fineness optimization module and an intelligent instant preparation module. The high-quality filling slurry can be prepared and then conveyed to a stope in a pressurized mode, instant preparation of the filling slurry, dynamic optimization of the proportion and accurate regulation and control of the filling process are achieved, insufficient quality, storage performance degradation and the like of a cementing material are effectively avoided, the filling stability and the resource utilization rate are improved, and intelligentization and environment friendliness are achieved at the same time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mine filling, in particular to a filling material slurry intelligent instant preparation filling system and method. BACKGROUND

[0002] As an indispensable part of modern mining, mine filling technology is mainly used for backfilling goaf to improve the safety and stability of the mine, and to avoid environmental pollution and resource waste. In the filling process, the commonly used filling materials include tailings, paste materials, cementing materials, etc., among which tailings filling is widely used in resource recovery and environmental protection of mines. However, in the actual application process, tailings filling technology still faces many technical problems. First, the traditional tailings filling technology needs to mix tailings slurry and cementing materials before filling, but due to the diversity of tailings composition, the concentration and rheological properties of tailings slurry often fluctuate greatly, resulting in unstable filling effect, especially after long-term storage, the properties of tailings slurry may change greatly, affecting the filling quality and efficiency.

[0003] In addition, cementing materials may also degrade in performance during storage, especially in high temperature and high humidity environments, making it difficult to guarantee the consolidation strength and stability of the materials during filling, especially in cases where long-term storage is required, the storage cost of cementing materials is high and the quality is difficult to control.

[0004] In addition, the traditional filling system often lacks pertinence, lacks flexible formula adjustment and real-time monitoring function, making it difficult to flexibly adjust the ratio and amount of filling slurry according to actual needs, affecting the filling effect and economic benefits of the mine. In terms of environmental protection, a large amount of water resources are often needed during the filling operation, and the traditional water recovery system has low efficiency, which may lead to waste of water in the tailings slurry and discharge of wastewater, causing certain environmental burden. In addition, tailings waste, wastewater and dust in the air during the filling process may also have certain impact on the environment, and higher efficient and environmentally friendly technical means are urgently needed to solve these problems. SUMMARY

[0005] The purpose of the present application is to provide a filling material slurry intelligent control and instant preparation scheme to solve the problems in the background art, which can adjust the filling slurry according to real-time needs, reduce the performance degradation of cementing materials during storage, and effectively improve the stability of filling quality, combined with the recycling of tailings resources, the recycling of wastewater, etc., in order to reduce the cost and reduce the pollution to the environment.

[0006] In order to achieve the above object, the present application provides a filling slurry intelligent instant preparation filling system, which comprises a flocculant preparation and adding device, a tailings bin, a deep-cone thickener, an overflow pool, a raw material bin, a raw material mixing bin, a dynamic powder concentrator, a cemented powder bin, a mixer, a filling industrial pump, a filling pipeline, and a digital twin platform.

[0007] The flocculant preparation and adding device, the tailings bin, the deep-cone thickener, and the overflow pool are used to thicken and separate tailings slurry and water.

[0008] The raw material bin, the raw material mixing bin, the dynamic powder concentrator, and the cemented powder bin are used to prepare cemented powder.

[0009] The mixer is used to fully mix the tailings slurry, water, and cemented powder to form filling slurry, the filling industrial pump is used to pressurize the filling slurry, and the filling slurry is transported to the corresponding stope through the filling pipeline for filling.

[0010] The digital twin platform comprises an intelligent thickening module, a gradation-fineness optimization module, and an intelligent instant preparation module. The intelligent thickening module is used to intelligently control the concentration of the thickened tailings slurry and the turbidity of water, the gradation-fineness optimization module is used to intelligently control the parameters of the cemented powder, and the intelligent instant preparation module is used to real-time control the proportion of the tailings slurry, the cemented powder, and the water input into the mixer. The intelligent thickening module, the gradation-fineness optimization module, and the intelligent instant preparation module share data and cooperatively control.

[0011] Further, the discharge port of the flocculant preparation and adding assembly is connected with the feeding port of the deep-cone thickener, the flocculant preparation and adding device is connected with a mine water delivery port, the feeding port of the deep-cone thickener is simultaneously connected with the discharge port of the tailings bin, the discharge port of the deep-cone thickener is connected with the mixer, and the top of the deep-cone thickener is connected with the feeding port of the overflow pool.

[0012] Further, the bottom of the deep-cone thickener is connected with the feeding port of the deep-cone thickener through a underflow circulation pipeline, the underflow circulation pipeline is provided with an electric valve, a circulating pump, and a concentration meter, a plurality of layered detection tubes are arranged on the sidewall of the deep-cone thickener at equal intervals along the height direction, each layered detection tube is provided with an electric valve and a concentration meter, and each layered detection tube is connected with the underflow circulation pipeline, a turbidity meter is further arranged between the top of the deep-cone thickener and the overflow pool, the electric valve, the concentration meter, and the turbidity meter are electrically connected with the intelligent thickening module, and the control valves of the flocculant preparation and adding device and the discharge port of the tailings bin are electrically connected with the intelligent thickening module.

[0013] Further, the raw material bin is one or a combination of a slag bin, a fly ash bin, a lead-zinc slag bin, a copper slag bin, a clinker bin, a fluorogypsum bin or a returned stone and fly ash bin, the corresponding raw material in the raw material bin enters the feed port of the raw material mixing bin and is mixed, the discharge port of the raw material mixing bin is connected with the dynamic powder classifier, the dynamic powder classifier is connected with the feed port of the cemented powder bin, the dynamic powder classifier is used for grinding the cemented powder to a preset fineness; the intelligent instant preparation filling system of the filling slurry is further provided with a laser particle size analyzer, the discharge ports of the raw material mixing bin and the deep-cone thickener are respectively connected with corresponding laser particle size analyzers, and the laser particle size analyzers and the dynamic powder classifier are electrically connected with the gradation-fineness optimization module.

[0014] Further, the discharge port of the cemented powder bin is connected with the stirrer, and the discharge port of the cemented powder bin is further provided with a micro-powder scale, which is used for weighing a preset weight of cemented powder.

[0015] Further, the roof of the stope is further provided with a laser radar, and the floor of the stope is further provided with a three-dimensional stress sensor, the laser radar and the three-dimensional stress sensor are electrically connected with the intelligent instant preparation module, and the intelligent instant preparation module is electrically connected with the control valves of the flocculant preparation and adding device, the tailing bin, the deep-cone thickener, the overflow pool and the discharge ports of the raw material bins.

[0016] The application further provides an intelligent instant preparation filling method of filling slurry, which is applied to the intelligent instant preparation filling system of filling slurry and comprises the following steps:

[0017] S1, the tailing slurry is subjected to thickening treatment, and the overflow water is collected for subsequent preparation of filling slurry;

[0018] S2, the cemented powder is prepared;

[0019] S3, the filling slurry is prepared, and the finished filling slurry is delivered to the area to be filled in the stope for filling operation.

[0020] Further, S1 specifically comprises the following sub-steps:

[0021] S11, the tailing slurry in the tailing bin is delivered to the deep-cone thickener for thickening, the mineral water enters the flocculant preparation and adding device, and the flocculant preparation and adding device delivers the flocculant to the deep-cone thickener;

[0022] S12, the tailing slurry is subjected to settlement, concentration and dehydration treatment in the deep-cone thickener, while the clarified water overflows from the top of the deep-cone thickener to the overflow pool, and the thickened tailing slurry is re-conveyed to the top of the deep-cone thickener for recycling concentration when the concentration of the thickened tailing slurry does not reach the standard, and the thickened tailing slurry is conveyed from the bottom of the deep-cone thickener to the mixer when the concentration reaches the standard.

[0023] Further, S2 specifically comprises the following sub-steps:

[0024] S21, conveying the raw materials from each raw material to the raw material mixing bin according to a preset ratio, and fully mixing the raw materials in the raw material bin to form the cementation powder;

[0025] S22, obtaining the aggregate gradation curve through the laser particle size analyzer, and feeding the data to the gradation-fineness optimization module;

[0026] S23, transporting the cementation powder to the dynamic powder separator;

[0027] S24, the gradation-fineness optimization module calculates the aggregate porosity, controls the dynamic powder separator to adjust the grinding fineness of the cementation powder according to the aggregate porosity, and then transports the cementation powder to the cementation powder bin;

[0028] S25, according to the required amount of cementation powder, weighing the corresponding amount of cementation powder through the micro powder scale, and conveying the cementation powder to the mixer.

[0029] Further, S3 specifically comprises the following sub-steps:

[0030] S31, collecting the point cloud data of the stope and sending it to the digital twin platform, determining the height of the to-be-filled area according to the received signal, calculating the filling rate and the to-be-filled volume, and obtaining the required filling amount;

[0031] S32, the intelligent instant preparation module controls the preparation of the filling material slurry in the mixer according to the determined types of the filling materials and the proportioning ratio of each type;

[0032] S33, the mixer is used for fully stirring the various types of filling materials added therein to prepare the filling material slurry product, which is then conveyed to the inlet of the filling industrial pump, the filling industrial pump is used for pressurizing the filling material slurry product, and the filling material slurry product is conveyed to the to-be-filled area in the stope through the filling pipeline for filling operation.

[0033] The above scheme of the present application has the following beneficial effects:

[0034] The application provides a filling slurry intelligent instant preparation filling system and method, which concentrates tailing slurry through a deep-cone thickener and a flocculating agent preparation and adding device, recycles overflow water to an overflow water pool for recycling, combines with glue setting powder prepared by mixing multiple raw materials in proportion, accurately feeds the glue setting powder to a mixer through a screw conveyor, detects corresponding data in real time through corresponding sensors, dynamically controls the proportioning of tailing slurry, glue setting powder and water through cooperation of various modules of a digital twin platform, and realizes instant preparation, dynamic optimization of proportioning and accurate regulation and control of the filling process of the filling slurry, effectively avoids quality deficiency of cementing materials and storage performance degradation and the like, improves filling stability and resource utilization rate, and has intelligence and environmental protection.

[0035] Other benefits of the application will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of the application;

[0037] Figure 2 It is a schematic diagram of the intelligent thickening module controlling tailing slurry concentration and overflow water turbidity.

[0038]

Explanation of reference signs

[0039] 1-flocculating agent preparation and adding device; 2-tailing bin; 3-deep-cone thickener; 4-overflow water pool; 5-raw material mixing bin; 6-dynamic powder selector; 7-glue setting powder bin; 8-mixer; 9-filling industrial pump; 10-filling pipeline; 11-intelligent thickening module; 12-gradation and fineness optimization module; 13-intelligent instant preparation module; 14-mining site; 15-mining site clean water delivery port; 16-underflow circulation pipeline; 17-electric valve; 18-circulation pump; 19-layered detection pipe; 20-concentration meter; 21-turbidity meter; 22-slag bin; 23-pulverized coal ash bin; 24-lead and zinc slag bin; 25-copper slag bin; 26-clinker bin; 27-fluorogypsum bin; 28-return stone and return ash bin; 29-microwave activation device; 30-lifting electric hoist; 31-laser particle size analyzer; 32-screw conveyor; 33-micropowder scale; 34-gas washing pipe device; 35-laser radar; 36-three-dimensional stress sensor. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and advantages of the present application clearer, the following will be described in detail in conjunction with the drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the protection scope of the present application. In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0041] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be a locking connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] As shown in Figure 1 The embodiment of the present application provides a filling slurry intelligent instant preparation filling system, which comprises a flocculant preparation and adding device 1, a tailing bin 2, a deep-cone thickener 3, an overflow pool 4, a raw material bin, a raw material mixing bin 5, a dynamic powder separator 6, a colloidal solid powder bin 7, a mixer 8, a filling industrial pump 9, a filling pipeline 10, and further comprises a digital twin platform, the digital twin platform comprising an intelligent thickening module 11, a gradation-fineness optimization module 12 and an intelligent instant preparation module 13. The flocculant preparation and adding device 1, the tailing bin 2, the deep-cone thickener 3 and the overflow pool 4 are used for thickening and separating tailing slurry and water, the raw material bin, the raw material mixing bin 5, the dynamic powder separator 6 and the colloidal solid powder bin 7 are used for preparing colloidal solid powder, and finally the tailing slurry, the water and the colloidal solid powder are fully mixed in the mixer 8, pressurized by the filling industrial pump 9 to form high-quality filling slurry, and then delivered to the corresponding stope 14 by the filling pipeline 10 for filling.

[0044] In the embodiment, the discharge port of the flocculant preparation and adding assembly 1 is connected with the feed port of the deep-cone thickener 3, and the flocculant preparation and adding device 1 is connected with the clean water conveying port 15 of the mine side, and the clean water conveyed through the clean water conveying port 15 conveys the flocculant in the flocculant preparation and adding device 1 to the deep-cone thickener 3. The feed port of the deep-cone thickener 3 is also connected with the discharge port of the tailings bin 2, and the tailings slurry enters the deep-cone thickener 3 from the tailings bin 2. In the deep-cone thickener 3, after the tailings slurry is subjected to the treatments such as sedimentation, thickening and dewatering, the underflow concentration is significantly improved, and the clarified water is gathered at the top of the deep-cone thickener 3. Therefore, the bottom of the deep-cone thickener 3 (the discharge port) is connected with the mixer 8, so that the thickened tailings slurry underflow enters the mixer 8. The top of the deep-cone thickener 3 is connected with the feed port of the overflow tank 4, so that the clarified water overflows from the top of the deep-cone thickener 3 and enters the overflow tank 4 for collection. In one specific embodiment, the size of the overflow tank 4 can be 3m*3m*4m, and the discharge port of the overflow tank 4 is also connected with the mixer 8.

[0045] Meanwhile, in the embodiment, the bottom of the deep-cone thickener 3 is connected with the feed port of the deep-cone thickener 3 through the underflow circulation pipeline 16, the underflow circulation pipeline 16 is opened and closed through the electric valve 17, and a circulation pump 18 is arranged, which is used to open and guide the underflow from the feed port of the deep-cone thickener 3 again to perform thickening treatment when the underflow concentration is insufficient. Finally, the concentration of the tailings slurry entering the mixer 8 is ensured to meet the standard to ensure the quality of the final filling slurry. As a preferred embodiment, a plurality of layered detection tubes 19 are arranged on the sidewall of the deep-cone thickener 3 in the height direction at equal intervals in the embodiment, each layered detection tube 19 is connected with the underflow circulation pipeline 16 through a corresponding electric valve 17, and a concentration meter 20 is arranged in each layered detection tube 19. The underflow circulation pipeline 16 is also provided with a concentration meter 20. Therefore, the concentrations (gradients) of different liquid levels in the deep-cone thickener 3 can be detected through each layered detection tube 19, which is more reasonable than the single underflow detection concentration method, and the electric valve 17 of the layered detection tube 19 can directly guide the tailings slurry of the corresponding liquid level into the underflow circulation pipeline 16 and convey it back to the feed port, so that the circulating thickening treatment of the tailings slurry is more timely, and the standard rate of the underflow concentration of the tailings slurry is improved. In addition, a turbidimeter 21 is arranged between the top of the deep-cone thickener 3 and the overflow tank 4, which is used to monitor the turbidity of the overflow water in real time and feedback, so as to facilitate the flocculant preparation and adding device 1 to increase the flocculant input and the tailings bin 2 to reduce the tailings slurry entering amount, so as to reduce the turbidity of the overflow water.

[0046] The concentration meter 20, the electric valve 17, etc. of the layered detection pipe 19 and the underflow circulating pipeline 16 are electrically connected (communicatively connected) with the intelligent thickening module 11, the turbidity meter 21 is also electrically connected with the intelligent thickening module 11, the flocculant preparation and adding device 1 and the control valve P of the discharge port of the tailings bin 2 are also electrically connected with the intelligent thickening module 11. The data detected by the concentration meter 20 and the turbidity meter 21 is sent to the intelligent thickening module 11, and the intelligent thickening module 11 sends control instructions to control the corresponding electric valve 17 or the flocculant preparation and adding device 1 or the tailings bin 2 according to the corresponding data.

[0047] In the embodiment, the raw material bin of the cementing powder includes a slag bin 22, a fly ash bin 23, a lead-zinc slag bin 24, a copper slag bin 25, a clinker bin 26, a fluorogypsum bin 27, a returned stone and fly ash bin 28, etc. In addition, other raw material bins can be set based on actual needs. The discharge ports of the slag bin 22 and the fly ash bin 23 are connected with the microwave activation device 29, and the microwave activation device 29 is connected with the feed inlet of the raw material mixing bin 5. The discharge ports of the lead-zinc slag bin 24, the copper slag bin 25, the clinker bin 26, the fluorogypsum bin 27 and the returned stone and fly ash bin 28 are directly connected with the feed inlet of the raw material mixing bin 5. The microwave activation device 29 is used to make the slag and the fly ash fully react inside and then enter the raw material mixing bin 5 to mix with other raw materials. In one specific embodiment, the size of each raw material bin can be set to 4.5m×4.5m×2m, the microwave frequency of the microwave activation device 29 can be set to 2.45GHz, and the power can be set to 30kW. Finally, the slag, the fly ash, the lead-zinc slag, the copper slag, the clinker, the fluorogypsum and the returned stone and fly ash are fully mixed in the raw material mixing bin 5.

[0048] The discharge port of the raw material mixing bin 5 is connected with the lifting electric hoist 30, and the lifting electric hoist 30 is connected with the dynamic powder classifier 6 at the same time, so as to lift and convey the cementing powder mixed in the raw material mixing bin 5 to the dynamic powder classifier 6 under the consideration of high-low arrangement. The dynamic powder classifier 6 is connected with the feed inlet of the cementing powder bin 7 at the same time, and the dynamic powder classifier 6 is used to grind the cementing powder put into the dynamic powder classifier 6, so that the cementing powder reaches the corresponding fineness and fills the gap of the aggregate (i.e. the tailings slurry). At the same time, the discharge port of the raw material mixing bin 5 is connected with a laser particle size analyzer 31, and the discharge port of the deep-cone thickener 3 is connected with another laser particle size analyzer 31, and the two laser particle size analyzers 31 are electrically connected with the gradation-fineness optimization module 12 at the same time. The laser particle size analyzer 31 is used to detect the aggregate and the cementing powder gradation data in real time and transmit to the gradation-fineness optimization module 12. The dynamic powder classifier 6 is also electrically connected with the gradation-fineness optimization module 12, and the gradation-fineness optimization module 12 sends control instructions to the dynamic powder classifier 6 to control the dynamic powder classifier 6 to dynamically adjust the fineness of the cementing powder, so that the particle size of the cementing powder matches the gap of the aggregate, and then the adjusted cementing powder is conveyed to the cementing powder bin 7 for storage.

[0049] In the embodiment, the discharge port of the cementation powder bin 7 is connected with the screw conveyor 32, and the screw conveyor 32 is connected with the mixer 8 at the same time, so as to transport the cementation powder in the cementation powder bin 7 to the mixer 8 as the cementation material. As a preferred embodiment, the discharge port position of the cementation powder bin 7 is also provided with the micro powder scale 33 in the embodiment, the micro powder scale 33 can weigh the cementation powder of a preset weight, and then the cementation powder is transported to the mixer 8 through the screw conveyor 32. In addition, the inlet position of the cementation powder bin 7 is also provided with the bin top dust remover 34, the bin top dust remover 34 is used to remove the dust left at the inlet position, so as to realize dust control and avoid pollution of the site environment.

[0050] In the embodiment, the mixer 8 adopts a double-shaft structure, and the feeding port of the mixer 8 is connected with the deep-cone thickener 3, the overflow pool 4 and the cementation powder bin 7 respectively, as described above. The mixer 8 is used to fully stir the mixture of the tailing slurry, water and cementation powder, so as to form high-quality and high-stability filling slurry. The discharge port of the mixer 8 is connected with the filling industrial pump 9, the filling industrial pump 9 is used to pressurize the finished product of the filling slurry, and the filling pipeline 10 is used to transport the pressurized filling slurry product to the filling area in the stope 14 for filling operation. As a preferred embodiment, the filling pipeline 10 is also connected with the air-washing device 34, the air-washing device 34 adopts a wind-water linkage mode to fully clean the filling pipeline 10, so as to avoid blockage and long-term accumulation of dirt in the filling pipeline 10.

[0051] In the embodiment, the roof of the stope 14 is also provided with a laser radar 35, and the floor is also provided with a three-dimensional stress sensor 36, both of which are used to collect distance signals and stress signals at the edges of each entity of the stope in real time to determine the height of the area to be filled, the strength of the filling, etc., so as to facilitate subsequent calculation of the filling rate and the volume to be filled of the stope to obtain the required filling amount of the stope, and adjustment of the fineness tolerance to ensure that the strength of the subsequent filling slurry is sufficient. The laser radar 35 and the three-dimensional stress sensor 36 are electrically connected with the intelligent instant preparation module 13, and the intelligent instant preparation module 13 is also electrically connected with the flocculant preparation and adding device 1, the tailings bin 2, the conical thickener 3, the overflow tank 4, and the control valve P of the discharge port of the raw material bin, so as to comprehensively control the preparation process of the final filling slurry. It should be noted that the intelligent instant preparation module 13 is also electrically connected with the intelligent thickening module 11 and the gradation-fineness optimization module 12, and the three share the real-time database of the digital twin platform to realize cross-validation. For example, the cemented powder fineness data output by the gradation-fineness optimization module 12 is used to correct the proportioning algorithm of the intelligent instant preparation module; the overflow turbidity historical record of the intelligent thickening module 11 is used by the intelligent instant preparation module 13 to predict the flocculant consumption trend and adjust the reagent reserve in advance; and the stope 14 filling body strength feedback data obtained by the intelligent instant preparation module 13 is transmitted to the gradation-fineness optimization module 12 to dynamically calibrate the gradation-fineness matching model.

[0052] Based on the same inventive concept, the embodiment also provides a filling slurry intelligent instant preparation filling method, which comprises the following steps:

[0053] S1, the tailings slurry is thickened, and the overflow water is collected for subsequent preparation of the filling slurry. This step can specifically include the following sub-steps:

[0054] S11, the tailings slurry in the tailings bin 2 is transported to the deep-cone thickener 3 for thickening, the mine water flows into the flocculant preparation and adding device 1, and the flocculant preparation and adding device 1 transports the flocculant to the deep-cone thickener 3.

[0055] S12, the tailings slurry is subjected to processes such as sedimentation, thickening, and dewatering in the deep-cone thickener 3, the clarified water overflows from the top of the deep-cone thickener 3 to the overflow tank 4, the concentration of the thickened tailings slurry needs to reach a first concentration value, for example, more than 68%, and if the concentration is not up to standard, the tailings slurry is transported back to the top of the deep-cone thickener 3 through the underflow circulation pipeline 16 for recirculation and thickening, and if the concentration is up to standard, the underflow of the tailings slurry is transported from the bottom of the deep-cone thickener 3 to the mixer 8.

[0056] In this step, the tailings slurry concentration data at different liquid levels are collected in real time through the layered detection pipe 19 of the side wall of the deep-cone thickener 3 , combined with the data of turbidimeter 21, transmitted to the intelligent thickening module 11, which builds the concentration-liquid level distribution curve to reflect the concentration situation in the deep cone thickener 3. When the concentration corresponding to the liquid level is abnormal, the control command is sent to open the corresponding layer detection tube 19 to guide the tailings slurry into the underflow circulating pipeline 16. When the underflow concentration is detected , the underflow circulating pipeline 16 and the circulating pump 18 are fully opened to return the tailings slurry to the deep cone thickener 3 for secondary concentration; when the overflow water turbidity ppm, the intelligent thickening module 11 and the intelligent instant preparation module 13 cooperate with the flocculant preparation and addition device 1 to increase the flocculant dosage by 10%~15%, while reducing the feed flow of the tailings bin 2 by 20%, until the overflow water turbidity ppm. It should be noted that during this process, the intelligent instant preparation module 13 dynamically calculates the optimal feed parameters and flocculant ratio based on the stope 14 filling demand, real-time concentration curve and overflow water turbidity, to ensure stable underflow concentration and meet the requirements of overflow water turbidity, avoiding manual intervention and lag. For specific process, please refer to Figure 2 .

[0057] S2, preparing the glue setting powder. This step specifically includes the following sub-steps:

[0058] S21, respectively according to the ratio of 45% of slag, 20.7% of fly ash, 8% of lead-zinc slag, 8% of copper slag, 7.5% of clinker, 7.3% of fluorogypsum, and 3.5% of returned stone and ash, the slag bin 22, the fly ash bin 23, the lead-zinc slag bin 24, the copper slag bin 25, the clinker bin 26, the fluorogypsum bin 27 and the returned stone and ash bin 28 are transported to the raw material mixing bin 5. Among them, the slag and fly ash are reacted in the microwave activation device 29 before being introduced into the raw material mixing bin 5.

[0059] S22, obtaining the aggregate (i.e. tailings slurry) grading curve through the corresponding laser particle size analyzer 31, and feeding the data to the grading-fineness optimization module 12. Among them, the laser particle size analyzer 31 collects the aggregate particle size distribution data in real time, which is transmitted to the grading-fineness optimization module 12 to generate the Rosin-Rammler distribution function: ; wherein, is the particle size, the characteristic particle size (63.2% cumulative passing particle size), and n is the distribution coefficient. This function describes the cumulative passing rate of the aggregate, and the aggregate particle size distribution density function is obtained by derivation. Based on the aggregate particle size distribution density function, the volume proportion of each particle size interval is obtained, and the aggregate dense packing density can be obtained by the characteristic particle size and the distribution coefficient n. Therefore, the grading-fineness optimization module 12 can calculate the aggregate void ratio: ; in, is the bulk density, which is collected in real time by a laser particle size analyzer 31. is the true density.

[0060] S23 , using the electric hoist 30 to transport the glue-solidified powder in the raw material mixing bin 5 to the dynamic powder classifier 6 .

[0061] S24: The grading-fineness optimization module 12 controls the dynamic powder selector 6 to adjust the grinding fineness of the cement powder, for example, 300-500 mesh, according to the aggregate gap ratio, and then transports the ground cement powder to the cement powder bin 7.

[0062] In this step, the specific control method is: target glue powder fineness Aggregate gap ratio match:

[0063] in, is the empirical coefficient.

[0064] Therefore, the dynamic powder separator 6 can be Adjust the classification speed : ; Among them, C is the equipment constant of dynamic powder concentrator 6.

[0065] Therefore, the dynamic powder classifier 6 ensures that the median particle size D50 of the cement powder satisfies D50≤0.3×minimum gap of aggregate by adjusting the classification speed, so that the cement powder finally prepared meets the filling requirements.

[0066] S25 , according to the required amount of adhesive powder, a corresponding amount of adhesive powder is weighed by the powder scale 33 , and the adhesive powder is transported to the mixer 8 by the screw conveyor 32 .

[0067] S3, prepare the filling slurry, and transport the finished filling slurry to the area to be filled in the stope 14 for filling operation. This step specifically includes the following sub-steps:

[0068] S31, the laser radar 35 and the three-dimensional stress sensor 36 cooperate with each other to collect the point cloud data of the mining area and send it to the digital twin platform, so as to determine the height of the area to be filled based on the received signal, and calculate the filling rate and the volume to be filled to obtain the required filling amount.

[0069] Specifically, the laser radar 35 and the three-dimensional stress sensor 36 collect the stope point cloud data, and construct a three-dimensional surface model through Delaunay triangulation. The filling volume is calculated as follows: ; wherein, is the triangular microelement area, is the height to be filled (i.e. the distance between the top and bottom of the stope).

[0070] filling rate The calculation method is as follows: ; wherein, is the total filling volume.

[0071] The intelligent real-time preparation module 13 controls the preparation of the filling slurry into the mixer 8 according to the determined type of filling material and the proportioning ratio of each type. The specific calculation formula is as follows:

[0072] total amount of filling slurry wherein is the density of the filling slurry; the mass of each component: tailing slurry , cemented powder , production water wherein, , are proportional coefficients, which can be taken as 68%~72%, and can be taken as 18%~22%.

[0073] At the same time, the cemented powder fineness data output by the gradation-fineness optimization module 12 can correct the proportioning algorithm of the intelligent real-time preparation module 13. When the fineness of the cemented powder is improved, the intelligent real-time preparation module 13 dynamically corrects the water-cement ratio: ; wherein D is the real-time fineness of the cemented powder, and -0.02 is an empirical coefficient.

[0074] When the three-dimensional stress sensor 36 detects insufficient strength, the gradation-fineness optimization module 12 automatically tightens the fineness tolerance: ; wherein, is the adjustment amount of the allowable error range of the fineness of the cemented powder, is the design strength of the filling body, is the actual strength of the filling body detected by the three-dimensional stress sensor 36, and also an empirical coefficient.

[0075] As a preferred embodiment, the intelligent real-time preparation module 13 in the embodiment can intelligently adjust the opening degree of the corresponding control valve based on the proportioning ratio, and adopts a PID control algorithm for adjustment, so that the mass of each component in the filling slurry dynamically meets the requirements.

[0076] S33, the filling material slurry product is prepared by fully stirring various fillings added therein through the stirrer 8, and then is delivered to the feeding port of the filling industrial pump 9, the filling material slurry product is pressurized by the filling industrial pump 9, and is delivered to the area to be filled in the stope 14 through the filling pipeline 10 for filling operation.

[0077] In summary, the filling material slurry intelligent instant preparation filling system and method provided by the embodiment, through the deep-cone thickener 3 and the flocculant preparation and adding device 1, the tailings slurry is concentrated and the overflow water is recovered to the overflow water pool 4 for recycling, combined with the cementing powder prepared by mixing multiple raw materials in proportion, the cementing powder is accurately fed to the stirrer 8 through the screw conveyor 32, the corresponding sensor is used to detect the corresponding data in real time, through the cooperation of each module of the digital twin platform, the ratio of the tailings slurry, the cementing powder and the water is dynamically controlled, the high-quality filling material slurry is stirred and then is pressurized and delivered to the stope 14, the instant preparation of the filling material slurry, the dynamic optimization of the ratio and the accurate regulation and control of the filling process are realized, the quality deficiency of the cementing material and the storage performance degradation are effectively avoided, the filling stability and the resource utilization rate are improved, and the intelligentization and the environmental protection are combined.

[0078] The technical features of the above embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0079] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An intelligent instant filling slurry preparation system, characterized in that: It includes flocculant preparation and addition device, tailings bin, deep cone thickener, overflow pool, raw material bin, raw material mixing bin, dynamic powder selector, glue-solid powder bin, mixer, filling industrial pump, filling pipeline, and also includes digital twin platform; The flocculant preparation and addition device, the tailings bin, the deep cone thickener, and the overflow pool are used to thicken and separate the tailings slurry and water; The raw material bin, the raw material mixing bin, the dynamic powder classifier, and the glue-solidifying powder bin are used to prepare glue-solidifying powder; The mixer is used to fully mix the tailings slurry, water and cement powder to form a filling slurry, and the filling industrial pump is used to pressurize the filling slurry and transport it to the corresponding stope through the filling pipeline for filling; The digital twin platform includes an intelligent thickening module, a grading-fineness optimization module and an intelligent instant preparation module. The intelligent thickening module is used to intelligently control the concentration of the tailings slurry after thickening and the turbidity of the water. The grading-fineness optimization module is used to intelligently control the parameters of the cement powder. The intelligent instant preparation module is used to control the proportion of tailings slurry, cement powder and water put into the mixer in real time. At the same time, the intelligent thickening module, the grading-fineness optimization module and the intelligent instant preparation module share data and coordinate control.

2. The intelligent instant filling slurry preparation system according to claim 1, characterized in that: The discharge port of the flocculant preparation and addition component is connected to the feed port of the deep cone thickener, the flocculant preparation and addition device is connected to the mine's clean water delivery port, the feed port of the deep cone thickener is also connected to the discharge port of the tailings bin, the discharge port of the deep cone thickener is connected to the mixer, and the top of the deep cone thickener is connected to the feed port of the overflow tank.

3. The intelligent instant filling slurry preparation system according to claim 2, characterized in that: The bottom of the deep cone thickener is connected to the feed port of the deep cone thickener through an underflow circulation pipeline. The underflow circulation pipeline is provided with an electric valve, a circulation pump and a concentration meter. A plurality of layered detection tubes are arranged at equal intervals along the height direction on the side wall of the deep cone thickener. Each of the layered detection tubes is provided with an electric valve and a concentration meter, and each of the layered detection tubes is connected to the underflow circulation pipeline. A turbidity meter is also provided between the top of the deep cone thickener and the overflow pool. The electric valve, the concentration meter and the turbidity meter are all electrically connected to the intelligent thickening module. The flocculant preparation and addition device and the control valve of the discharge port of the tailings bin are all electrically connected to the intelligent thickening module.

4. The intelligent instant filling slurry preparation system according to claim 1, characterized in that: The raw material bin is one or a combination of a slag bin, a fly ash bin, a lead-zinc slag bin, a copper slag bin, a clinker bin, a fluorspar bin, or a return stone and ash bin. The corresponding raw materials in the raw material bin enter and are mixed from the feed port of the raw material mixing bin. The discharge port of the raw material mixing bin is connected to the dynamic powder classifier, and the dynamic powder classifier is connected to the feed port of the cement powder bin. The dynamic powder classifier is used to grind the cement powder to achieve a preset fineness. The intelligent instant preparation and filling system for filling slurry is also provided with a laser particle size analyzer. The discharge port of the raw material mixing bin and the discharge port of the deep cone thickener are respectively connected to the corresponding laser particle size analyzer. The laser particle size analyzer and the dynamic powder classifier are both electrically connected to the grading-fineness optimization module.

5. The intelligent instant filling slurry preparation system according to claim 1, characterized in that: The discharge port of the adhesive powder bin is connected to the mixer, and a micro powder scale is also provided at the discharge port of the adhesive powder bin, and the micro powder scale is used to weigh the adhesive powder of a preset weight.

6. The intelligent instant filling slurry preparation system according to claim 1, characterized in that: A laser radar is also provided on the top plate of the mining site, and a three-dimensional stress sensor is also provided on the bottom plate of the mining site. The laser radar and the three-dimensional stress sensor are electrically connected to the intelligent instant preparation module, and the intelligent instant preparation module is electrically connected to the flocculant preparation and addition device, the tailings bin, the deep cone thickener, the overflow pool, and the control valve of the discharge port of the raw material bin.

7. A method for intelligent instant preparation and filling of a filling slurry, applied to an intelligent instant preparation and filling system of a filling slurry according to any one of claims 1 to 6, characterized in that: The steps include: S1, thickening the tailings slurry and collecting the overflow water for subsequent preparation of filling slurry; S2, preparation of glue powder; S3, preparing the filling slurry, and transporting the finished filling slurry to the area to be filled in the stope for filling operation.

8. The method for intelligent instant filling slurry preparation according to claim 7, characterized in that: S1 specifically includes the following sub-steps: S11, the tailings slurry in the tailings bin is transported to the deep cone thickener for concentration, and the clean water from the mine enters the flocculant preparation and addition device, which transports the flocculant to the deep cone thickener; S12, the tailings slurry is processed by sedimentation, concentration and dehydration in the deep cone thickener. At the same time, the clarified water overflows from the top of the deep cone thickener to the overflow pool. If the concentration of the thickened tailings slurry bottom flow does not meet the standard, it will be re-transported to the top of the deep cone thickener for circulation and concentration. After the concentration meets the standard, the tailings slurry bottom flow is transported from the bottom of the deep cone thickener to the mixer.

9. The method for intelligent instant filling slurry preparation according to claim 7, characterized in that: S2 specifically includes the following sub-steps: S21, transporting the raw materials from various sources to a raw material mixing bin according to a preset ratio, and fully mixing them in the bin to form a solid powder; S22, obtain the aggregate gradation curve through the laser particle size analyzer and feed the data back to the gradation-fineness optimization module; S23, transporting the glue powder to a dynamic powder classifier; S24: The gradation-fineness optimization module calculates the aggregate gap ratio, controls the dynamic powder selector according to the aggregate gap ratio to adjust the grinding fineness of the cement powder, and then transports it to the cement powder bin; S25, according to the required amount of adhesive powder, a corresponding amount of adhesive powder is weighed using a micro powder scale, and the adhesive powder is transported to the mixer.

10. The method for intelligent instant filling slurry preparation according to claim 7, characterized in that: S3 specifically includes the following sub-steps: S31, collecting the stope point cloud data and sending it to the digital twin platform, determining the height of the area to be filled based on the received signal, and calculating the filling rate and the volume to be filled to obtain the required filling volume; S32, the intelligent instant preparation module controls the mixing of the fillers according to the determined filler types and the proportions of the fillers to prepare the filler slurry; S33, fully stir the various fillers added therein through a mixer to prepare a finished filling slurry, which is then transported to the feed port of a filling industrial pump. The finished filling slurry is pressurized by the filling industrial pump and transported through a filling pipeline to the area to be filled in the mining area for filling operations.

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