Intelligent monitoring and closed-loop control system and method for slurry concentration of mine filling station

Abstract

The application provides a mine filling station slurry concentration intelligent monitoring and closed-loop regulation system and method, and belongs to the technical field of automatic monitoring and process control. First, slurry side parameters, batching side parameters and conveying side parameters are collected in real time online and converted into corresponding slurry side parameter signals, batching side parameter signals and conveying side parameter signals. Each parameter signal is preprocessed and multi-parameter fusion calculation is performed to obtain a standardized concentration feature set. The batching and conveying working condition results are determined according to the batching side parameters and the conveying side parameters. The current pulp preparation and conveying working condition are determined in combination with the standardized concentration feature set, corresponding regulation instructions and safety protection instructions are generated, parameter adjustment of the slurry preparation process is performed, and hierarchical interlocking actions are executed. The adjusted running state is fed back to the multi-source parameter acquisition module, the continuous and accurate monitoring and stable automatic regulation of the slurry concentration are realized, the conveying failure risk is reduced, and the filling production automation level is improved.

Description

Technical Field

[0001] This invention relates to the field of automated monitoring and process control technology, and in particular to an intelligent monitoring and closed-loop control system and method for slurry concentration in mine backfilling stations. Background Technology

[0002] Mine backfilling stations are core facilities for green mining and tailings resource utilization in underground mines. Slurry concentration is a key parameter that directly affects the strength of the backfill, conveying resistance, pumping stability, and system energy consumption. Too low a slurry concentration will lead to insufficient backfill strength, increased water separation, and reduced utilization of solid materials; too high a concentration will increase the mixing load and pumping resistance, exacerbate pipeline wear, and even cause production failures such as pipe blockage and shutdown.

[0003] The current slurry concentration control in mine backfilling stations suffers from several shortcomings: First, concentration detection relies heavily on manual sampling and offline testing, making continuous real-time monitoring difficult and resulting in significant lag in test results, failing to provide timely basis for dynamic control. Second, batching control often employs fixed parameters or manual adjustment, resulting in a crude control method that cannot automatically correct batching parameters based on concentration fluctuations, making it difficult to guarantee concentration stability. Third, control processes are mostly open-loop, and test results cannot be automatically fed back to the water supply, material supply, and mixing actuators, resulting in a low degree of automation. Fourth, existing control methods are slow to respond to complex scenarios such as fluctuations in raw material moisture content, unstable material supply, and changes in conveying conditions, easily leading to large concentration fluctuations. Fifth, there is a lack of a coordinated control mechanism for concentration anomalies and conveying risks; changes in pumping pressure caused by excessive concentration cannot be identified and controlled in a timely manner, easily triggering a chain reaction of conveying failures.

[0004] Currently, there is an urgent need for a control system that can achieve synchronous online monitoring of multiple parameters, multi-source fusion concentration calculation, adaptive closed-loop regulation under operating conditions, and graded safety interlocking, in order to improve the accuracy of slurry concentration control and the reliability of system operation in mine backfilling stations.

[0005] Therefore, the present invention provides an intelligent monitoring and closed-loop control system and method for slurry concentration in mine backfilling stations. Summary of the Invention

[0006] The purpose of this invention is to overcome the problems of lagging detection, crude control, lack of closed loop, poor adaptability to working conditions, and insufficient risk coordination in the existing slurry concentration control of mine backfilling stations. It provides an intelligent monitoring and closed-loop control system for slurry concentration in mine backfilling stations. Through synchronous acquisition of multi-source parameters, multi-parameter fusion concentration calculation, working condition matching closed-loop control, and hierarchical safety interlocking, it achieves continuous and accurate monitoring and stable automatic control of slurry concentration, reduces the risk of conveying failure, and improves the automation level of backfilling production.

[0007] This invention provides an intelligent monitoring and closed-loop control system for slurry concentration in mine backfilling stations, comprising: The multi-source parameter acquisition module is used to acquire slurry-side parameters, batching-side parameters and conveying-side parameters in real time and convert them into corresponding slurry-side parameter signals, batching-side parameter signals and conveying-side parameter signals. The data feature processing module is used to perform synchronous correction, filtering and noise reduction, temperature compensation and multi-parameter fusion calculation on each parameter signal to obtain a standardized concentration feature set. The closed-loop control and decision-making module is used to determine the basic batching and conveying conditions based on the batching side parameters and conveying side parameters, determine the current pulping and conveying conditions in combination with the standardized concentration feature set, and generate corresponding control commands and safety protection commands. The execution and safety interlock module is used to adjust the parameters of the slurry preparation process according to the control command, and at the same time execute the graded interlock action according to the safety protection command, and feed back the adjusted operating status to the multi-source parameter acquisition module.

[0008] In one implementable manner, the multi-source parameter acquisition module includes: The slurry-side acquisition unit is located at the outlet of the mixing tank or the outlet of the slurry pool. It is used to collect slurry density, solids content, slurry flow rate and slurry temperature and convert them into slurry-side parameter signals. The batching side acquisition unit is arranged in the water supply pipeline, feeder, binder feeding device and stirring drive end. It is used to collect water supply, feed amount, binder addition amount and stirring status and convert them into batching side parameter signals. The delivery-side acquisition unit is located on the filling pump and the delivery pipeline. It is used to acquire the filling pump speed, valve position, motor current and pipeline pressure and convert them into delivery-side parameter signals. The unified coding unit is used to add time stamp codes to the slurry-side parameter signals, batching-side parameter signals, and conveying-side parameter signals according to the same sampling clock.

[0009] In one implementable manner, the data feature processing module includes: The synchronization correction unit receives the slurry-side parameter signal, batching-side parameter signal and conveying-side parameter signal output by the multi-source parameter acquisition module, and aligns the slurry-side parameter signal, batching-side parameter signal and conveying-side parameter signal into a multi-channel synchronous data frame according to a unified time scale; The filtering and denoising unit uses a combination of moving average filtering and outlier removal to filter out interference and jump data in the synchronous data frames of each channel, and outputs the filtered parameter sequence. The temperature compensation unit corrects the density value in the slurry side parameter signal for temperature based on the pre-calibrated density-temperature correction relationship and outputs the compensated density value. The multi-parameter fusion unit substitutes the compensated density value, solids content value, water supply and feed rate into the concentration conversion relationship, outputs the comprehensive concentration identification result, and combines the concentration deviation, concentration change rate, concentration fluctuation amplitude, slurry state stability index and batching consistency index to assemble a standardized concentration feature set.

[0010] In one implementable manner, the closed-loop control decision module includes: The batching and conveying condition preliminary judgment unit is used to make a preliminary judgment on the feeding stability, mixing operation status, pump load level and pipeline pressure status based on the input batching side parameter signal and conveying side parameter signal, and obtain the basic batching and conveying condition results; The pulping condition matching unit is used to match and couple the concentration level and fluctuation of the standardized concentration feature set with the results of the basic batching and conveying conditions. The control command generation unit is used to calculate the adjustment amount of the water supply valve opening, feeder speed, binder dosage and stirring operation parameters according to the working condition type and concentration deviation obtained by matching coupling, and to generate and output the control command; The safety protection instruction generation unit is used to classify the severity of the abnormality by combining the concentration exceeding the limit level and the transportation risk level, and generate and output safety protection instructions of different levels accordingly.

[0011] In one implementable manner, the execution and safety interlock module includes: The execution drive unit is used to receive control commands and drive the water valve, feeder, binder feeder, stirring drive device and compensation valve to adjust the parameters of the slurry preparation process. The feedback verification unit is used to read the real-time concentration value in the post-adjustment running status returned by the multi-source parameter acquisition module after each adjustment action, calculate the convergence degree of the concentration deviation before and after adjustment, and feed back the verification result to the multi-source parameter acquisition module. The graded interlocking unit is used to receive safety protection commands and execute at least one action among pre-alarm, minor correction, active load reduction, material stop protection, or interlocked shutdown according to the graded control strategy.

[0012] In one implementable manner, the slurry-side acquisition unit includes... The density detection subunit is used to continuously acquire the real-time density value of the slurry and output the corresponding detection signal using an online differential pressure density detection device; The solid content detection subunit is used to acquire the mass percentage of solid materials in the slurry in real time and output the corresponding detection signal using an online solid content detection device. The flow detection subunit is used to acquire the instantaneous delivery flow rate and cumulative flow rate of the slurry in real time and output the corresponding detection signal using an electromagnetic flow detection device. The temperature detection subunit is used to acquire the temperature value of the slurry medium in real time and output the corresponding detection signal using a contact temperature sensor.

[0013] One feasible approach also includes: The identification conditions for pulping and conveying conditions in the closed-loop control decision module are as follows: when the concentration deviation exceeds the threshold, the pipeline pressure deviates from the benchmark value by more than a set ratio, and the filling pump motor current fluctuation exceeds the set range, it is determined to be an abnormal concentration.

[0014] This invention provides an intelligent monitoring and closed-loop control system for slurry concentration in mine backfilling stations, and further includes: The slurry state stability index in the standardized concentration feature set includes: the absolute value of real-time concentration deviation, the absolute value of concentration change rate, and the concentration fluctuation amplitude summed by weight. The consistency indicators of feed composition include: the variance of water supply fluctuation and the variance of feed fluctuation per unit time; When the slurry stability index is lower than the first warning threshold, the closed-loop control decision module triggers a slight correction. When the stability index of the slurry state is lower than the second warning threshold and the pipeline pressure is abnormal, the execution and safety interlock module enters the protection control mode.

[0015] The beneficial effects achievable by this invention are as follows: 1. Compared with manual sampling and offline analysis, this invention can continuously acquire concentration-related parameters, improving real-time performance and control accuracy; 2. It transforms traditional manual experience-based adjustment into automatic detection, analysis, and correction, improving the stability of concentration control; 3. By coordinating the adjustment of water supply, feed rate, and stirring state, the slurry concentration is maintained within the target range over a long period, improving the consistency of filling quality; 4. When the properties of raw materials, feeding status, and conveying conditions change, the system can respond quickly and automatically correct, reducing the impact of lag in manual adjustments; 5. Concentration anomalies are often accompanied by changes in conveying resistance. This invention, through coordinating the analysis of concentration and conveying conditions, can reduce the risks of pipe blockage, pumping fluctuations, and downtime; 6. The system has a high degree of modularity and is compatible with existing mine filling station slurry preparation and automation systems, making it suitable for engineering applications.

[0016] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the composition of an intelligent monitoring and closed-loop control system for slurry concentration in a mine backfilling station according to an embodiment of the present invention; Figure 2 This is a schematic diagram illustrating the workflow of an intelligent monitoring and closed-loop control method for slurry concentration in a mine backfilling station, as described in an embodiment of the present invention. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] Example 1: This example provides an intelligent monitoring and closed-loop control system for slurry concentration in a mine backfilling station, such as... Figure 1 As shown, it includes: The multi-source parameter acquisition module is used to acquire slurry-side parameters, batching-side parameters and conveying-side parameters in real time and convert them into corresponding slurry-side parameter signals, batching-side parameter signals and conveying-side parameter signals. The data feature processing module is used to perform synchronous correction, filtering and noise reduction, temperature compensation and multi-parameter fusion calculation on each parameter signal to obtain a standardized concentration feature set. The closed-loop control and decision-making module is used to determine the basic batching and conveying conditions based on the batching side parameters and conveying side parameters, determine the current pulping and conveying conditions in combination with the standardized concentration feature set, and generate corresponding control commands and safety protection commands. The execution and safety interlock module is used to adjust the parameters of the slurry preparation process according to the control command, and at the same time execute the graded interlock action according to the safety protection command, and feed back the adjusted operating status to the multi-source parameter acquisition module.

[0021] In this example, the slurry-side parameters refer to physical parameters collected from the slurry body that can directly or indirectly reflect the slurry concentration state, including slurry density, solids content, slurry flow rate, and slurry temperature.

[0022] In this example, the batching-side parameters represent the operational parameters of the batching stage during slurry preparation, including water supply, feed rate, binder addition, and mixing status parameters. In this example, the conveying-side parameters represent the equipment and pipeline operational parameters of the slurry conveying stage, including filling pump speed, valve position, motor current, and pipeline pressure parameters. In this example, the slurry-side parameter signal represents a standardized electrical or digital signal that can be transmitted and processed after the slurry-side parameters are converted by the acquisition device.

[0023] In this example, the ingredient side parameter signal represents a standardized electrical or digital signal that can be transmitted and processed after the ingredient side parameters are converted by the corresponding acquisition device.

[0024] In this example, the transmission-side parameter signal represents a standardized electrical or digital signal that can be transmitted and processed after the transmission-side parameters have been converted by the corresponding acquisition device.

[0025] In this example, synchronization correction means aligning parameter signals from different sources and with different transmission delays into time-consistent multi-channel data based on a unified time scale, eliminating timing deviations and dimensional differences among the acquisition channels. In this example, filtering and denoising employ a combination of moving average filtering and outlier removal to filter out acquisition interference and abrupt data in the parameter signals, outputting a smooth and stable parameter sequence.

[0026] In this example, temperature compensation means that the slurry density detection value is corrected for temperature based on a pre-calibrated density-temperature correction relationship, so as to offset the interference of temperature fluctuation on the accuracy of concentration calculation.

[0027] In this example, multi-parameter fusion calculation refers to the process of substituting the compensated density value, solids content value, water flow rate, and feed rate into the concentration conversion relationship to calculate the comprehensive concentration identification result and extract multi-dimensional concentration features. In this example, the standardized concentration feature set represents the standardized feature data set obtained after multi-parameter fusion calculation, which includes the comprehensive concentration value, concentration deviation, concentration change rate, concentration fluctuation amplitude, slurry state stability index, and batching consistency index.

[0028] In this example, the basic batching and conveying condition results represent the basic condition conclusions obtained by making preliminary judgments on feeding stability, mixing operation status, pump load level, and pipeline pressure status based solely on batching-side parameters and conveying-side parameters.

[0029] In this example, the control command refers to the control instructions generated based on the operating condition type and concentration deviation level, used to control the actions of each actuator, including adjustments to the water supply valve opening, feeder speed, binder dosage, and mixing operation parameters. In this example, the safety protection command refers to the control instructions generated based on the concentration exceedance level and the transportation risk level, used to trigger graded safety protection actions.

[0030] In this example, the graded interlocking action refers to a multi-level safety protection action executed sequentially from low to high according to the severity of the abnormality, including pre-alarm, minor correction, active load reduction, material stop protection, and interlock shutdown.

[0031] In this example, parameter adjustment refers to the control action of adjusting the operating parameters of the water valve, feeder, binder feeder, stirring drive device and compensation valve according to the control command, so as to change the solid-liquid ratio and mixing state of the slurry.

[0032] The working principle and beneficial effects of the above technical solution are as follows: The multi-source parameter acquisition module, by arranging corresponding acquisition devices at the mixing tank outlet, batching loop, and conveying pipeline, collects slurry-side parameters, batching-side parameters, and conveying-side parameters in real time and converts them into corresponding slurry-side parameter signals, batching-side parameter signals, and conveying-side parameter signals, providing the system with a multi-dimensional real-time data source and solving the shortcomings of traditional manual sampling and detection, such as lag and single data dimension; After receiving the three types of parameter signals, the data feature processing module sequentially performs synchronous correction, filtering and denoising, temperature compensation, and multi-parameter fusion calculation to obtain a standardized concentration feature set. This ensures the consistency and reliability of multi-source data through time alignment and denoising processing, and improves the concentration recognition accuracy through temperature correction and multi-source data fusion, overcoming the error limitations of a single detection method; The closed-loop control decision module first... The basic batching and conveying conditions are determined by judging the parameters on the batching side and the conveying side. Then, the current slurry preparation and conveying conditions are determined by matching the standardized concentration feature set. Corresponding control instructions and safety protection instructions are generated to achieve differentiated control adapted to the working conditions, effectively improving the system's ability to adapt to fluctuations in raw material properties and changes in conveying conditions. After receiving instructions from the execution and safety interlocking module, on the one hand, the parameters of the slurry preparation process are adjusted according to the control instructions, and on the other hand, graded interlocking actions are executed according to the safety protection instructions. At the same time, the adjusted operating status is fed back to the multi-source parameter acquisition module to form a complete closed-loop control link. This not only maintains the stability of slurry concentration through automatic closed-loop adjustment, but also reduces the risk of conveying failures such as pipe blockage and machine shutdown caused by abnormal concentration through the graded interlocking mechanism. Overall, the automation control level and operational reliability of slurry preparation in mine filling stations are improved.

[0033] Example 2: Based on Example 1, the intelligent monitoring and closed-loop control system for slurry concentration in a mine backfilling station includes a multi-source parameter acquisition module comprising: The slurry-side acquisition unit is located at the outlet of the mixing tank or the outlet of the slurry pool. It is used to collect slurry density, solids content, slurry flow rate and slurry temperature and convert them into slurry-side parameter signals. The batching side acquisition unit is arranged in the water supply pipeline, feeder, binder feeding device and stirring drive end. It is used to collect water supply, feed amount, binder addition amount and stirring status and convert them into batching side parameter signals. The delivery-side acquisition unit is located on the filling pump and the delivery pipeline. It is used to acquire the filling pump speed, valve position, motor current and pipeline pressure and convert them into delivery-side parameter signals. The unified coding unit is used to add time stamp codes to the slurry-side parameter signals, batching-side parameter signals, and conveying-side parameter signals according to the same sampling clock.

[0034] In this example, the mixing tank outlet indicates the location of the discharge pipe of the mixing tank equipment used to complete the mixing of the slurry, which is the key measuring point location where the slurry flows out after the mixing is completed.

[0035] In this example, the slurry tank outlet indicates the location of the discharge pipe of the slurry tank used to temporarily store the prepared slurry, and it is a monitoring point before the slurry enters the conveying process. In this example, slurry density represents the mass of slurry per unit volume, and it is a core basic physical parameter used to convert slurry concentration.

[0036] In this example, the solids content represents the proportion of the mass of solid material in the slurry to the total mass of the slurry, and is a characteristic parameter that directly reflects the concentration level of the slurry.

[0037] In this example, the slurry flow rate represents the volume of slurry passing through the measuring point section per unit time, which is used to reflect the scale of slurry transportation and flow state.

[0038] In this example, the slurry temperature represents the real-time temperature value of the slurry medium, which is used to correct the density detection and concentration calculation results for temperature.

[0039] In this example, the water supply pipeline points to the pipeline line that supplies water for the pulping process and is the location where the water supply parameters are collected.

[0040] In this example, the feeder, the binder feeder, and the stirring drive end represent the corresponding positions of the feeding equipment that supplies the main solid materials to the pulping process, the binder feeder that supplies the cementitious materials, and the drive mechanism that provides stirring power to the mixing tank. These are the data collection and layout points for the batching and stirring parameters.

[0041] In this example, the water supply rate represents the amount of water added to the pulping system per unit time, and is one of the core batching parameters determining the slurry concentration. Similarly, the feed rate represents the amount of the main solid material added to the pulping system per unit time, and is also one of the core batching parameters determining the slurry concentration.

[0042] In this example, the amount of binder added represents the amount of cementitious material added to the slurry system per unit time, which is used to adjust the slurry composition and the strength characteristics of the filling body.

[0043] In this example, the stirring status refers to parameters such as the operating speed, running time, and load status of the stirring equipment, which are used to reflect the degree of uniformity of the slurry mixing.

[0044] In this example, the filling pump and the corresponding position on the conveying pipeline represent the filling pump equipment used for pressurizing and conveying the slurry, and the pipeline body used for conveying the slurry. These are the data collection and deployment points for conveying operating parameters.

[0045] In this example, the filling pump speed represents the operating rotational speed of the filling pump, which reflects the conveying power and flow rate of the slurry.

[0046] In this example, the valve position indicates the opening degree of the regulating valve on the delivery pipeline, which is used to reflect the pipeline's flow capacity and flow regulation status.

[0047] In this example, the motor current and pipeline pressure represent the operating current value of the driving equipment and the static pressure value of the slurry in the conveying pipeline, respectively, reflecting the equipment load status and the slurry conveying resistance status.

[0048] In this example, the sampling clock represents a unified reference timing signal within the system, used to provide a consistent time reference for all acquired data.

[0049] In this example, the time stamp encoding represents the time stamp encoding assigned to each group of acquired signals based on a unified sampling clock, which is used to achieve timing alignment of multiple signals.

[0050] The working principle and beneficial effects of the above technical solution are as follows: The multi-source parameter acquisition module arranges the slurry-side acquisition unit at the outlet of the mixing tank or slurry pool to collect slurry density, solids content, slurry flow rate, and slurry temperature in real time and converts them into slurry-side parameter signals. The batching-side acquisition unit is arranged in the water supply pipeline, feeder, binder feeding device, and mixing drive end to collect water supply, feed rate, binder addition amount, and mixing status and convert them into batching-side parameter signals. The conveying-side acquisition unit is arranged in the filling pump and conveying pipeline to collect filling pump speed, valve position, motor current, and pipeline pressure and convert them into conveying-side parameter signals. At the same time, a unified coding unit is used to classify the three types of parameters. By tagged with time-stamped codes according to the same sampling clock, the synchronous online acquisition and standardized signal output of multi-dimensional parameters of the entire process of slurry preparation and transportation in mine filling stations are realized. This not only comprehensively covers three types of core data—slurry body state, batching process parameters, and transportation operation conditions—by strategically deploying points at each stage, thus overcoming the shortcomings of traditional manual detection which has a single dimension and cannot achieve process-state correlation analysis, but also eliminates timing deviations caused by different acquisition devices and transmission links through time-stamped codes with a unified time base. This ensures the consistency and alignment of data timing in subsequent multi-parameter fusion calculations, providing a stable and reliable underlying data source support for accurate concentration identification, operation condition assessment, and closed-loop control.

[0051] Example 3: Based on Example 1, the intelligent monitoring and closed-loop control system for slurry concentration in a mine backfilling station includes a data feature processing module comprising: The synchronization correction unit receives the slurry-side parameter signal, batching-side parameter signal and conveying-side parameter signal output by the multi-source parameter acquisition module, and aligns the slurry-side parameter signal, batching-side parameter signal and conveying-side parameter signal into a multi-channel synchronous data frame according to a unified time scale; The filtering and denoising unit uses a combination of moving average filtering and outlier removal to filter out interference and jump data in the synchronous data frames of each channel, and outputs the filtered parameter sequence. The temperature compensation unit corrects the density value in the slurry side parameter signal for temperature based on the pre-calibrated density-temperature correction relationship and outputs the compensated density value. The multi-parameter fusion unit substitutes the compensated density value, solids content value, water supply and feed rate into the concentration conversion relationship, outputs the comprehensive concentration identification result, and combines the concentration deviation, concentration change rate, concentration fluctuation amplitude, slurry state stability index and batching consistency index to assemble a standardized concentration feature set.

[0052] In this example, the typical concentration conversion relationship is: Comprehensive concentration value = (compensated density value - liquid phase density) / (solid phase density - liquid phase density) × weight 1 + solid content detection value × weight 2 + (feed amount + binder addition amount) / (water supply amount + feed amount + binder addition amount) × weight 3. The sum of the three weights is 1, which can be calibrated according to the on-site detection accuracy. When the deviation of different detection results exceeds the set threshold, the detection item with higher reliability is used as the main factor for fusion correction.

[0053] In this example, the multi-channel synchronous data frame represents a set of data that is formed by aligning multiple parameter signals from the slurry side, batching side, and conveying side with a unified time scale, and the time nodes correspond one-to-one.

[0054] In this example, the combined approach of moving average filtering and outlier removal represents a combined data denoising method. First, a moving window is used to take the mean, suppressing random noise. Then, a threshold is used to remove abrupt changes in data that exceed the normal fluctuation range. In this example, the filtered parameter sequence represents the smooth, continuous parameter data sequence obtained after denoising, removing interference and abrupt changes.

[0055] In this example, the pre-calibrated density-temperature correction relationship represents the corresponding correction curve or correction formula for the change of slurry density with temperature, which is determined in advance through experiments and is used to correct the temperature error of the density detection value.

[0056] In this example, the density value represents the mass value of a unit volume of slurry detected by the acquisition device, and is the core basic parameter for converting slurry concentration.

[0057] In this example, temperature correction refers to the process of correcting the original density detection value based on the real-time temperature of the slurry and the calibrated correction relationship, in order to eliminate the influence of temperature changes on the density detection results.

[0058] In this example, the compensated density value represents the slurry density value obtained after temperature correction processing, eliminating temperature interference.

[0059] In this example, the solids content value represents the proportion of the mass of solid material in the slurry to the total mass of the slurry, and is a characteristic parameter that directly reflects the proportion of solid phase in the slurry.

[0060] In this example, the water supply and feed rate represent the amount of water and solid material added per unit time during the pulping process, which are the core parameters of the batching side involved in the concentration conversion.

[0061] In this example, the concentration conversion relationship represents the calculation formula or logic for calculating the slurry concentration based on the relationship between the mass and volume of solid-liquid two-phase materials, derived from density, solid content, and feed amount.

[0062] In this example, the comprehensive concentration identification result represents the final value of the slurry concentration obtained by multi-source parameter fusion calculation, which is a result of the correction of multiple detection and ingredient parameters.

[0063] In this example, the concentration deviation represents the deviation between the real-time slurry concentration and the preset target concentration or target concentration range.

[0064] In this example, the concentration change rate represents the magnitude of change in slurry concentration per unit time, used to reflect the dynamic trend of concentration change.

[0065] In this example, the concentration fluctuation amplitude represents the maximum fluctuation range of the slurry concentration within a set time window, which is used to reflect the severity of the concentration fluctuation.

[0066] In this example, the slurry stability index is a quantitative indicator used to comprehensively evaluate the stability of slurry concentration, which is obtained by weighting parameters such as concentration deviation, concentration change rate, and concentration fluctuation amplitude.

[0067] In this example, the batching consistency index is a quantitative indicator composed of the variance of water supply fluctuation and the variance of feed fluctuation, used to evaluate the stability of batching process parameters.

[0068] The working principle and beneficial effects of the above technical solution are as follows: The data feature processing module receives the slurry-side parameter signals, batching-side parameter signals, and conveying-side parameter signals output by the multi-source parameter acquisition module through the synchronization correction unit. It aligns the three types of parameter signals into multi-channel synchronous data frames according to a unified time scale, eliminating transmission delays and timing deviations between different acquisition channels from the source, ensuring that the multi-source data has a consistent time base, and providing a timing basis for subsequent multi-parameter fusion calculations. Then, the filtering and denoising unit uses a combination of moving average filtering and outlier removal to filter out random interference and abnormal jumps in each channel's synchronous data frame, outputting a smooth and stable filtered parameter sequence. This effectively reduces acquisition noise caused by the complex environment of the mine site and improves the reliability of the original data. Subsequently, the temperature compensation unit, based on a pre-defined standard... A fixed density-temperature correction relationship is established to correct the density value in the slurry-side parameter signal for temperature, outputting a compensated density value to offset the systematic error caused by slurry temperature fluctuations in the density detection results, thus solidifying the accuracy of the basic data for concentration calculation. Finally, through a multi-parameter fusion unit, the compensated density value, solids content value, water flow rate, and feed rate are substituted into the concentration conversion relationship to output a comprehensive concentration identification result. This result is then combined with concentration deviation, concentration change rate, concentration fluctuation amplitude, slurry state stability index, and batching consistency index to assemble a standardized concentration feature set. This approach overcomes the accuracy limitations of a single detection method through cross-fusion of multi-source data, yielding concentration results that better reflect actual operating conditions. Furthermore, it constructs a multi-dimensional feature system to comprehensively characterize the slurry stability and batching operation level, providing complete and reliable data support for subsequent operating condition analysis and precise closed-loop control.

[0069] Example 4: Based on Example 1, the intelligent monitoring and closed-loop control system for slurry concentration in a mine backfilling station includes a closed-loop control decision module comprising: The batching and conveying condition preliminary judgment unit is used to make a preliminary judgment on the feeding stability, mixing operation status, pump load level and pipeline pressure status based on the input batching side parameter signal and conveying side parameter signal, and obtain the basic batching and conveying condition results; The pulping condition matching unit is used to match and couple the concentration level and fluctuation of the standardized concentration feature set with the results of the basic batching and conveying conditions. The control command generation unit is used to calculate the adjustment amount of the water supply valve opening, feeder speed, binder dosage and stirring operation parameters according to the working condition type and concentration deviation obtained by matching coupling, and to generate and output the control command; The safety protection instruction generation unit is used to classify the severity of the abnormality by combining the concentration exceeding the limit level and the transportation risk level, and generate and output safety protection instructions of different levels accordingly.

[0070] In this example, feed stability refers to the smoothness of the supply flow of the main solid material during the pulping process, and is used to reflect whether there are abnormal states such as material interruption or excessive flow fluctuation in the feeding process.

[0071] In this example, the stirring operation status represents the comprehensive status of the stirring equipment's operating parameters such as rotation speed, running time, and load level, which is used to reflect the uniformity of the slurry mixing and whether the stirring equipment is operating normally.

[0072] In this example, the pump load level and pipeline pressure status represent the operating load of the filling pump and the pressure of the slurry in the delivery pipeline, which are used to reflect the operating resistance and equipment load status of the delivery process.

[0073] In this example, the concentration level represents the real-time slurry concentration and is used to determine whether the slurry concentration is in a low, normal, or high range.

[0074] In this example, the degree of fluctuation represents the amplitude and frequency of fluctuation in slurry concentration within a set time window, which is used to reflect the stability of slurry concentration.

[0075] In this example, matching coupling refers to the process of correlating and verifying the characteristic data of the concentration dimension with the working conditions of the batching and conveying dimension, and finally determining the complete pulping and conveying working conditions.

[0076] In this example, the operating condition type represents the category of pulping and conveying operating conditions identified after matching and coupling, including categories such as normal pulping, low concentration, high concentration, concentration fluctuation, abnormal feeding, abnormal stirring, and conveying risk.

[0077] In this example, the typical operating condition judgment rules are as follows: a feed rate fluctuation of >10% is judged as an abnormal feed condition; a stirring current fluctuation of >15% is judged as an abnormal stirring condition; a high concentration + increased pipeline pressure + increased pump current is judged as a high concentration conveying risk condition; the operating condition-adjustment mapping rule is as follows: when the concentration is low, the opening of the water supply valve is reduced and the feeder speed is increased according to the deviation ratio. For every 1% increase in deviation, the water supply is reduced by 0.8% and the feed rate is increased by 0.5%; when the concentration is high, the opposite adjustment is made; when multiple adjustment values ​​conflict, the conveying safety is prioritized, followed by maintaining the concentration accuracy.

[0078] In this example, the degree of concentration deviation indicates the magnitude of the deviation between the real-time slurry concentration and the target concentration or target concentration range, and is the core basis for classifying the adjustment intensity level.

[0079] In this example, the opening degree of the water supply valve indicates the opening range of the regulating valve on the pulping water supply pipeline, which is used to control the amount of water supplied per unit time.

[0080] In this example, the feeder rate represents the operating speed of the main solid material feeding equipment, which is used to control the amount of solid material supplied per unit time.

[0081] In this example, the amount of binder added represents the amount of cementitious material added to the pulping system per unit time, which is used to adjust the proportion of cementitious components in the slurry.

[0082] In this example, the stirring operation parameters refer to controllable operating parameters such as the operating speed of the stirring equipment and the duration of a single stirring cycle, which are used to adjust the mixing effect of the slurry.

[0083] In this example, the concentration exceedance level represents the level of abnormality based on the magnitude of the slurry concentration exceeding the target range, and is used to measure the severity of the concentration abnormality.

[0084] In this example, the transportation risk level represents the level of transportation failure risk classified based on parameters such as pipeline pressure and pump load, combined with abnormal concentration conditions. It is used to measure the degree of safety risk in the transportation process.

[0085] In this example, the severity of the anomaly represents the overall level of anomaly determined after considering both the concentration exceeding the limit and the transportation risk, and serves as the basis for triggering different levels of safety protection actions.

[0086] The working principle and beneficial effects of the above technical solution are as follows: The closed-loop control decision module receives input batching-side parameter signals and conveying-side parameter signals through the batching and conveying condition preliminary judgment unit. It first makes a preliminary judgment on feeding stability, stirring operation status, pump load level, and pipeline pressure status to obtain basic batching and conveying condition results. This preliminary screening of conditions from the perspective of process equipment avoids the one-sidedness and misjudgment risks caused by relying solely on concentration data to determine conditions. Then, the pulping condition matching unit matches and couples the concentration level and fluctuation degree of the standardized concentration feature set with the basic batching and conveying condition results, achieving two-way verification of slurry quality status and process operation status. This enables accurate identification of the actual pulping and conveying condition type, significantly improving the accuracy and reliability of condition judgment. Subsequently, the control command generation unit... Based on the operating condition type and concentration deviation obtained from the matching coupling, the adjustment amounts of the water supply valve opening, feeder speed, binder dosage, and stirring operation parameters are calculated and output as control commands. Differentiated adjustment strategies can be output for different operating conditions. Compared with the fixed parameter control mode, it is more adaptable to the fluctuation of raw material properties and changes in conveying conditions, effectively improving the adaptive capability and control accuracy of concentration control. Finally, the safety protection command generation unit combines the concentration over-limit level and the conveying risk level to classify the severity of the anomaly, and generates and outputs safety protection commands of different levels, realizing the hierarchical control of abnormal risks. It can maintain production operation and perform small parameter corrections in the case of mild anomalies, and can trigger hierarchical protection actions in a timely manner in high-risk scenarios, taking into account both the continuity of production operation and the safety of system conveying.

[0087] Example 5: Based on Example 1, the intelligent monitoring and closed-loop control system for slurry concentration in a mine backfilling station includes an execution and safety interlock module comprising: The execution drive unit is used to receive control commands and drive the water valve, feeder, binder feeder, stirring drive device and compensation valve to adjust the parameters of the slurry preparation process. The feedback verification unit is used to read the real-time concentration value in the post-adjustment running status returned by the multi-source parameter acquisition module after each adjustment action, calculate the convergence degree of the concentration deviation before and after adjustment, and feed back the verification result to the multi-source parameter acquisition module. The graded interlocking unit is used to receive safety protection commands and execute at least one action among pre-alarm, minor correction, active load reduction, material stop protection, or interlocked shutdown according to the graded control strategy.

[0088] In this example, the convergence rate is calculated as follows: Convergence rate = (absolute value of concentration deviation before adjustment - absolute value of concentration deviation after adjustment) / absolute value of concentration deviation before adjustment × 100%; a positive convergence rate indicates that the deviation has narrowed, and a negative convergence rate indicates that the deviation has expanded. The verification result is used to correct the adjustment gain in the next cycle and optimize the weight ratio of each detection item in the multi-parameter fusion.

[0089] In this example, the action of driving the water supply valve means outputting a drive signal to the regulating valve on the pulping water supply pipeline to adjust its opening range in order to control the amount of water supplied per unit time.

[0090] In this example, the feeder refers to the conveying equipment that supplies the main solid material to the pulping system, and the amount of solid material supplied per unit time can be changed by adjusting its operating speed.

[0091] In this example, the binder feeding device refers to the metering and feeding equipment that adds cementitious materials to the slurry system, and is used to control the proportion of the binder component in the slurry and the strength characteristics of the filling body.

[0092] In this example, the stirring drive device refers to the drive mechanism that provides rotational power to the mixing tank. By adjusting its operating parameters, the stirring speed can be changed, thereby controlling the degree of uniformity of the slurry mixing.

[0093] In this example, the action of the compensation valve indicates that the opening of the compensation regulating valve in the pipeline is adjusted to buffer fluctuations in slurry parameters and improve the transition stability of the conveying process.

[0094] In this example, the real-time concentration value in the adjusted operating state represents the real-time value that is obtained by the slurry-side acquisition unit after the adjustment action is performed, reflecting the current true concentration level of the slurry.

[0095] In this example, the degree of convergence represents the magnitude and speed at which the concentration deviation moves toward the target range after the adjustment action is executed, and is used to quantitatively evaluate the actual control effect of a single round of adjustment action.

[0096] In this example, the pre-alarm refers to a warning triggered by a slight concentration abnormality or potential risk, used to remind operators to pay attention to changes in operating conditions, without affecting the normal production and operation of the system.

[0097] In this example, a minor correction refers to a small parameter adjustment performed for a minor concentration deviation, correcting the concentration deviation without changing the overall operating state of the system.

[0098] In this example, proactive unloading refers to a protective action that reduces the operating load of the filling pump and feeding system under moderate abnormal conditions in order to alleviate conveying resistance and reduce the risk of escalation of failure.

[0099] In this example, the material stoppage protection refers to the protective action of stopping the supply of solid materials and binders in response to more serious abnormal operating conditions, while maintaining water supply and stirring operation to prevent the concentration from continuing to rise abnormally.

[0100] In this example, interlocking shutdown refers to a system-wide coordinated shutdown action triggered by a serious safety risk, used to avoid equipment damage and production accidents, and to ensure the safety of the system and personnel.

[0101] The working principle and beneficial effects of the above technical solution are as follows: The execution and safety interlock module, as the execution landing point and safety barrier of the system, receives the control instructions output by the closed-loop control decision module through the execution drive unit, and drives the water valve, feeder, binder feeder, stirring drive device and compensation valve respectively to precisely adjust the parameters of the slurry preparation process. It transforms the digital control instructions into actual adjustments to the material ratio and process state in the slurry preparation process, replacing the traditional manual adjustment method, significantly improving the control response speed and execution accuracy, and realizing the automation of concentration control. Then, through the feedback verification unit, after each adjustment action is completed and after the process lag time, it reads the real-time concentration value in the adjusted operating state returned by the multi-source parameter acquisition module, and calculates the concentration deviation before and after the adjustment. The system assesses the convergence level and feeds the verification results back to the multi-source parameter acquisition module to update subsequent sampling weights, enabling online evaluation of control effects and dynamic optimization of sampling strategies. This continuous iteration improves the accuracy of closed-loop control and reduces the risk of overshoot and repeated concentration fluctuations. Simultaneously, the system receives safety protection commands through a hierarchical interlocking unit and executes at least one action from the following hierarchical control strategies: pre-alarm, minor correction, active load reduction, material stoppage protection, or interlock shutdown. Differentiated protection measures are matched for concentration anomalies and transportation risks of varying severity. This ensures production continuity and gradual correction of operating conditions during minor anomalies, while also rapidly triggering mandatory protection in high-risk scenarios. This effectively prevents the escalation of faults such as pipe blockage and equipment overload, comprehensively guaranteeing the operational safety and production stability of the slurry preparation and transportation process in the mine filling station.

[0102] Example 6: Based on Example 2, the intelligent monitoring and closed-loop control system for slurry concentration in a mine backfilling station includes a slurry-side acquisition unit comprising... The density detection subunit is used to continuously acquire the real-time density value of the slurry and output the corresponding detection signal using an online differential pressure density detection device; The solid content detection subunit is used to acquire the mass percentage of solid materials in the slurry in real time and output the corresponding detection signal using an online solid content detection device. The flow detection subunit is used to acquire the instantaneous delivery flow rate and cumulative flow rate of the slurry in real time and output the corresponding detection signal using an electromagnetic flow detection device. The temperature detection subunit is used to acquire the temperature value of the slurry medium in real time and output the corresponding detection signal using a contact temperature sensor.

[0103] In this example, the online differential pressure density detection device represents a density detection device based on the principle of hydrostatic pressure difference, which can be installed on the conveying pipeline or tank and run continuously. It calculates the density of the slurry by measuring the pressure difference between two points in the slurry, and is suitable for online detection scenarios of high-concentration solid-liquid two-phase slurries in mines.

[0104] In this example, the real-time density value represents the mass value of a unit volume of slurry, which is collected in real time by the density detection device. It is the core basic parameter for converting slurry concentration.

[0105] In this example, the online solid content detection device refers to a solid proportion detection device that can operate continuously online, used to directly determine the proportion level of solid materials in the slurry, providing a direct basis for concentration determination based on the solid proportion.

[0106] In this example, the mass percentage of solid material represents the ratio of the mass of solid material in the slurry to the total mass of the slurry, which is a core characteristic parameter that directly reflects the concentration of the slurry.

[0107] In this example, the electromagnetic flow detection device refers to a flow detection device based on the principle of electromagnetic induction, which is suitable for flow measurement of conductive solid-liquid two-phase fluids and can obtain slurry flow data without disturbing the flow field.

[0108] In this example, the instantaneous delivery flow rate and cumulative flow rate represent the volume of slurry passing through the detection section per unit time and the total volume of slurry passing through within a set time period, respectively reflecting the real-time delivery rate and cumulative delivery scale of the slurry.

[0109] In this example, the contact temperature sensor refers to a sensing device that acquires temperature data through direct contact with the slurry medium, and can stably obtain the real-time temperature of the slurry medium.

[0110] In this example, the medium temperature value represents the real-time temperature of the slurry fluid itself, which is used to provide a basis for temperature correction calculation of the density detection results.

[0111] The working principle and beneficial effects of the above technical solution are as follows: The slurry-side acquisition unit continuously acquires the real-time density value of the slurry using an online differential pressure density detection device through the density detection subunit and outputs the corresponding detection signal; the solid content detection subunit acquires the mass percentage of solid materials in the slurry in real time using an online solid content detection device and outputs the corresponding detection signal; the flow rate detection subunit acquires the instantaneous delivery flow rate and cumulative flow rate of the slurry in real time using an electromagnetic flow rate detection device and outputs the corresponding detection signal; and the temperature detection subunit acquires the medium temperature value of the slurry in real time using a contact temperature sensor and outputs the corresponding detection signal. These four types of detection... The collaborative deployment of measuring devices enables continuous online acquisition of core parameters of the slurry across all dimensions. Density and solids content data can be cross-validated for concentration calculation benchmarks, slurry flow rate parameters are used for conveying condition identification and flow correction verification, and temperature data provides a basis for subsequent density correction and concentration compensation calculations. The multi-source parameters complement and verify each other, which not only replaces the lagging mode of traditional manual sampling and offline detection, but also significantly improves the real-time and continuous nature of slurry condition monitoring. Furthermore, the complementarity of multi-dimensional detection data reduces the error limitations of single detection methods, effectively improving the accuracy and reliability of the original collected data, and providing a solid data foundation for subsequent high-precision concentration fusion calculations.

[0112] Example 7: Based on Example 1, the intelligent monitoring and closed-loop control system for slurry concentration in a mine backfilling station further includes: The identification conditions for pulping and conveying conditions in the closed-loop control decision module are as follows: when the concentration deviation exceeds the threshold, the pipeline pressure deviates from the benchmark value by more than a set ratio, and the filling pump motor current fluctuation exceeds the set range, it is determined to be an abnormal concentration.

[0113] In this example, the threshold is ±1.5% to ±3% of the target slurry mass concentration, and it can also be calibrated on-site according to the filling process and quality requirements; In this example, the set ratio is 10% to 20% of the normal operating reference pressure of the pipeline, but it can also be determined by calibration in combination with pipeline characteristics, equipment parameters and on-site working conditions. In this example, the setting range is ±8% to ±15% of the rated operating current of the filling pump motor. It can also be determined by calibration in combination with pipeline characteristics, equipment parameters and on-site working conditions.

[0114] The working principle and beneficial effects of the above technical solution are as follows: The closed-loop control decision module uses a coupling of three parameters—concentration, pipeline pressure, and motor current—for identification. When the concentration deviation exceeds a threshold, the pipeline pressure deviates from the benchmark value by more than a set proportion, and the filling pump motor current fluctuation exceeds a set range, it is determined to be an abnormal concentration condition. This judgment logic avoids misjudgment based on a single parameter through multi-parameter cross-verification, improves the accuracy of abnormal identification, and can detect the transportation risks associated with abnormal concentrations in advance, providing a reliable basis for graded protection.

[0115] Example 8: Based on Example 1, the intelligent monitoring and closed-loop control system for slurry concentration in a mine backfilling station further includes: The slurry state stability index in the standardized concentration feature set includes: the absolute value of real-time concentration deviation, the absolute value of concentration change rate, and the concentration fluctuation amplitude summed by weight. The consistency indicators of feed composition include: the variance of water supply fluctuation and the variance of feed fluctuation per unit time; When the slurry stability index is lower than the first warning threshold, the closed-loop control decision module triggers a slight correction. When the stability index of the slurry state is lower than the second warning threshold and the pipeline pressure is abnormal, the execution and safety interlock module enters the protection control mode.

[0116] In this example, the absolute value of the real-time concentration deviation represents the absolute value of the difference between the real-time slurry concentration and the target concentration, which is used to characterize the magnitude of the concentration deviation from the target.

[0117] In this example, the absolute value of the concentration change rate represents the absolute value of the change in slurry concentration per unit time, and is used to characterize the speed of concentration change.

[0118] In this example, the concentration fluctuation amplitude is represented by a weighted summation, which assigns corresponding weights to three types of parameters: real-time concentration deviation, concentration change rate, and concentration fluctuation amplitude, and then adds them together to obtain the calculation process for comprehensively evaluating the stability of the slurry.

[0119] In this example, the variance of water supply fluctuation represents the degree of dispersion of water supply data relative to its mean within a unit time period, and is used to quantify the magnitude of water supply fluctuation. In this example, the variance of feed rate fluctuation represents the degree of dispersion of feed rate data relative to its mean within a unit time period, and is used to quantify the magnitude of feed rate fluctuation.

[0120] In this example, the first warning threshold represents the critical value of the stability index used to trigger a mild correction action, corresponding to the warning level for mild concentration fluctuations.

[0121] In this example, the second warning threshold represents the critical value of the stability index used to trigger the protection control mode, corresponding to the warning level of abnormal concentration accompanied by transportation risk.

[0122] The working principle and beneficial effects of the above technical solution are as follows: Within the standardized concentration feature set, the slurry stability index is calculated by weighted summation of the absolute value of the real-time concentration deviation, the absolute value of the concentration change rate, and the concentration fluctuation amplitude. The batching consistency index is composed of the variance of the water supply fluctuation and the variance of the feed fluctuation per unit time. The system sets two-level early warning thresholds. When the stability index is lower than the first early warning threshold, a slight correction is triggered. When it is lower than the second early warning threshold and the pipeline pressure is abnormal, the system enters the protection control mode. The stability of the slurry is evaluated quantitatively, and gradient graded regulation is achieved, taking into account both the concentration control accuracy and the safety of transportation and operation.

[0123] Example 9: This example provides a method for intelligent monitoring and closed-loop control of slurry concentration in mine backfilling stations, such as... Figure 2 As shown, it includes: Step 1: Real-time online acquisition of slurry-side parameters, batching-side parameters, and conveying-side parameters, and conversion into corresponding slurry-side parameter signals, batching-side parameter signals, and conveying-side parameter signals; Step 2: Perform synchronous correction, filtering and noise reduction, temperature compensation and multi-parameter fusion calculation on each parameter signal to obtain a standardized concentration feature set; Step 3: Determine the basic batching and conveying conditions based on the batching side parameters and conveying side parameters, determine the current pulping and conveying conditions in conjunction with the standardized concentration feature set, and generate corresponding control commands and safety protection commands; Step 4: Adjust the parameters of the slurry preparation process according to the control instructions, execute the graded interlocking action according to the safety protection instructions, and feed back the adjusted operating status to the multi-source parameter acquisition module.

[0124] In this example, the slurry-side parameters refer to physical parameters collected from the slurry body that can directly or indirectly reflect the slurry concentration state, including slurry density, solids content, slurry flow rate, and slurry temperature.

[0125] In this example, the batching-side parameters represent the operational parameters of the batching stage during slurry preparation, including water supply, feed rate, binder addition, and mixing status parameters. In this example, the conveying-side parameters represent the equipment and pipeline operational parameters of the slurry conveying stage, including filling pump speed, valve position, motor current, and pipeline pressure parameters. In this example, the slurry-side parameter signal represents a standardized electrical or digital signal that can be transmitted and processed after the slurry-side parameters are converted by the acquisition device.

[0126] In this example, the ingredient side parameter signal represents a standardized electrical or digital signal that can be transmitted and processed after the ingredient side parameters are converted by the corresponding acquisition device.

[0127] In this example, the transmission-side parameter signal represents a standardized electrical or digital signal that can be transmitted and processed after the transmission-side parameters have been converted by the corresponding acquisition device.

[0128] In this example, synchronization correction means aligning parameter signals from different sources and with different transmission delays into time-consistent multi-channel data based on a unified time scale, eliminating timing deviations and dimensional differences among the acquisition channels. In this example, filtering and denoising employ a combination of moving average filtering and outlier removal to filter out acquisition interference and abrupt data in the parameter signals, outputting a smooth and stable parameter sequence.

[0129] In this example, temperature compensation means that the slurry density detection value is corrected for temperature based on a pre-calibrated density-temperature correction relationship, so as to offset the interference of temperature fluctuation on the accuracy of concentration calculation.

[0130] In this example, multi-parameter fusion calculation refers to the process of substituting the compensated density value, solids content value, water flow rate, and feed rate into the concentration conversion relationship to calculate the comprehensive concentration identification result and extract multi-dimensional concentration features. In this example, the standardized concentration feature set represents the standardized feature data set obtained after multi-parameter fusion calculation, which includes the comprehensive concentration value, concentration deviation, concentration change rate, concentration fluctuation amplitude, slurry state stability index, and batching consistency index.

[0131] In this example, the basic batching and conveying condition results represent the basic condition conclusions obtained by making preliminary judgments on feeding stability, mixing operation status, pump load level, and pipeline pressure status based solely on batching-side parameters and conveying-side parameters.

[0132] In this example, the control command refers to the control instructions generated based on the operating condition type and concentration deviation level, used to control the actions of each actuator, including adjustments to the water supply valve opening, feeder speed, binder dosage, and mixing operation parameters. In this example, the safety protection command refers to the control instructions generated based on the concentration exceedance level and the transportation risk level, used to trigger graded safety protection actions.

[0133] In this example, the graded interlocking action refers to a multi-level safety protection action executed sequentially from low to high according to the severity of the abnormality, including pre-alarm, minor correction, active load reduction, material stop protection, and interlock shutdown.

[0134] In this example, parameter adjustment refers to the control action of adjusting the operating parameters of the water valve, feeder, binder feeder, stirring drive device and compensation valve according to the control command, so as to change the solid-liquid ratio and mixing state of the slurry.

[0135] The working principle and beneficial effects of the above technical solution are as follows: The multi-source parameter acquisition module, by arranging corresponding acquisition devices at the mixing tank outlet, batching loop, and conveying pipeline, collects slurry-side parameters, batching-side parameters, and conveying-side parameters in real time and converts them into corresponding slurry-side parameter signals, batching-side parameter signals, and conveying-side parameter signals, providing the system with a multi-dimensional real-time data source and solving the shortcomings of traditional manual sampling and detection, such as lag and single data dimension; After receiving the three types of parameter signals, the data feature processing module sequentially performs synchronous correction, filtering and denoising, temperature compensation, and multi-parameter fusion calculation to obtain a standardized concentration feature set. This ensures the consistency and reliability of multi-source data through time alignment and denoising processing, and improves the concentration recognition accuracy through temperature correction and multi-source data fusion, overcoming the error limitations of a single detection method; The closed-loop control decision module first... The basic batching and conveying conditions are determined by judging the parameters on the batching side and the conveying side. Then, the current slurry preparation and conveying conditions are determined by matching the standardized concentration feature set. Corresponding control instructions and safety protection instructions are generated to achieve differentiated control adapted to the working conditions, effectively improving the system's ability to adapt to fluctuations in raw material properties and changes in conveying conditions. After receiving instructions from the execution and safety interlocking module, on the one hand, the parameters of the slurry preparation process are adjusted according to the control instructions, and on the other hand, graded interlocking actions are executed according to the safety protection instructions. At the same time, the adjusted operating status is fed back to the multi-source parameter acquisition module to form a complete closed-loop control link. This not only maintains the stability of slurry concentration through automatic closed-loop adjustment, but also reduces the risk of conveying failures such as pipe blockage and machine shutdown caused by abnormal concentration through the graded interlocking mechanism. Overall, the automation control level and operational reliability of slurry preparation in mine filling stations are improved.

[0136] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A smart monitoring and closed-loop control system for slurry concentration in a mine backfilling station, characterized in that, include: The multi-source parameter acquisition module is used to acquire slurry-side parameters, batching-side parameters and conveying-side parameters in real time and convert them into corresponding slurry-side parameter signals, batching-side parameter signals and conveying-side parameter signals. The data feature processing module is used to perform synchronous correction, filtering and noise reduction, temperature compensation and multi-parameter fusion calculation on each parameter signal to obtain a standardized concentration feature set. The closed-loop control and decision-making module is used to determine the basic batching and conveying conditions based on the batching side parameters and conveying side parameters, determine the current pulping and conveying conditions in combination with the standardized concentration feature set, and generate corresponding control commands and safety protection commands. The execution and safety interlock module is used to adjust the parameters of the slurry preparation process according to the control command, and at the same time execute the graded interlock action according to the safety protection command, and feed back the adjusted operating status to the multi-source parameter acquisition module.

2. The intelligent monitoring and closed-loop control system for slurry concentration in a mine backfilling station as described in claim 1, characterized in that, The multi-source parameter acquisition module includes: The slurry-side acquisition unit is located at the outlet of the mixing tank or the outlet of the slurry pool. It is used to collect slurry density, solids content, slurry flow rate and slurry temperature and convert them into slurry-side parameter signals. The batching side acquisition unit is arranged in the water supply pipeline, feeder, binder feeding device and stirring drive end. It is used to collect water supply, feed amount, binder addition amount and stirring status and convert them into batching side parameter signals. The delivery-side acquisition unit is located on the filling pump and the delivery pipeline. It is used to acquire the filling pump speed, valve position, motor current and pipeline pressure and convert them into delivery-side parameter signals. The unified coding unit is used to add time stamp codes to the slurry-side parameter signals, batching-side parameter signals, and conveying-side parameter signals according to the same sampling clock.

3. The intelligent monitoring and closed-loop control system for slurry concentration in a mine backfilling station as described in claim 1, characterized in that, The data feature processing module includes: The synchronization correction unit receives the slurry-side parameter signal, batching-side parameter signal and conveying-side parameter signal output by the multi-source parameter acquisition module, and aligns the slurry-side parameter signal, batching-side parameter signal and conveying-side parameter signal into a multi-channel synchronous data frame according to a unified time scale; The filtering and denoising unit uses a combination of moving average filtering and outlier removal to filter out interference and jump data in the synchronous data frames of each channel, and outputs the filtered parameter sequence. The temperature compensation unit corrects the density value in the slurry side parameter signal for temperature based on the pre-calibrated density-temperature correction relationship and outputs the compensated density value. The multi-parameter fusion unit substitutes the compensated density value, solids content value, water supply and feed rate into the concentration conversion relationship, outputs the comprehensive concentration identification result, and combines the concentration deviation, concentration change rate, concentration fluctuation amplitude, slurry state stability index and batching consistency index to assemble a standardized concentration feature set.

4. The intelligent monitoring and closed-loop control system for slurry concentration in a mine backfilling station as described in claim 1, characterized in that, The closed-loop control decision module includes: The batching and conveying condition preliminary judgment unit is used to make a preliminary judgment on the feeding stability, mixing operation status, pump load level and pipeline pressure status based on the input batching side parameter signal and conveying side parameter signal, and obtain the basic batching and conveying condition results; The pulping condition matching unit is used to match and couple the concentration level and fluctuation of the standardized concentration feature set with the results of the basic batching and conveying conditions. The control command generation unit is used to calculate the adjustment amount of the water supply valve opening, feeder speed, binder dosage and stirring operation parameters according to the working condition type and concentration deviation obtained by matching coupling, and to generate and output the control command; The safety protection instruction generation unit is used to classify the severity of the abnormality by combining the concentration exceeding the limit level and the transportation risk level, and generate and output safety protection instructions of different levels accordingly.

5. The intelligent monitoring and closed-loop control system for slurry concentration in a mine backfilling station as described in claim 1, characterized in that, The execution and safety interlock module includes: The execution drive unit is used to receive control commands and drive the water valve, feeder, binder feeder, stirring drive device and compensation valve to adjust the parameters of the slurry preparation process. The feedback verification unit is used to read the real-time concentration value in the post-adjustment running status returned by the multi-source parameter acquisition module after each adjustment action, calculate the convergence degree of the concentration deviation before and after adjustment, and feed back the verification result to the multi-source parameter acquisition module. The graded interlocking unit is used to receive safety protection commands and execute at least one action among pre-alarm, minor correction, active load reduction, material stop protection, or interlocked shutdown according to the graded control strategy.

6. The intelligent monitoring and closed-loop control system for slurry concentration in a mine backfilling station as described in claim 2, characterized in that, The slurry-side acquisition unit includes: The density detection subunit is used to continuously acquire the real-time density value of the slurry and output the corresponding detection signal using an online differential pressure density detection device; The solid content detection subunit is used to acquire the mass percentage of solid materials in the slurry in real time and output the corresponding detection signal using an online solid content detection device. The flow detection subunit is used to acquire the instantaneous delivery flow rate and cumulative flow rate of the slurry in real time and output the corresponding detection signal using an electromagnetic flow detection device. The temperature detection subunit is used to acquire the temperature value of the slurry medium in real time and output the corresponding detection signal using a contact temperature sensor.

7. The intelligent monitoring and closed-loop control system for slurry concentration in a mine backfilling station as described in claim 1, characterized in that, Also includes: The identification conditions for pulping and conveying conditions in the closed-loop control decision module are as follows: when the concentration deviation exceeds the threshold, the pipeline pressure deviates from the benchmark value by more than a set ratio, and the filling pump motor current fluctuation exceeds the set range, it is determined to be an abnormal concentration.

8. The intelligent monitoring and closed-loop control system for slurry concentration in a mine backfilling station as described in claim 1, characterized in that, Also includes: The slurry state stability index in the standardized concentration feature set includes: the absolute value of real-time concentration deviation, the absolute value of concentration change rate, and the concentration fluctuation amplitude summed by weight. The consistency indicators of feed composition include: the variance of water supply fluctuation and the variance of feed fluctuation per unit time; When the slurry stability index is lower than the first warning threshold, the closed-loop control decision module triggers a slight correction. When the stability index of the slurry state is lower than the second warning threshold and the pipeline pressure is abnormal, the execution and safety interlock module enters the protection control mode.

9. A method for intelligent monitoring and closed-loop control of slurry concentration in a mine backfilling station, characterized in that, include: Step 1: Real-time online acquisition of slurry-side parameters, batching-side parameters, and conveying-side parameters, and conversion into corresponding slurry-side parameter signals, batching-side parameter signals, and conveying-side parameter signals; Step 2: Perform synchronous correction, filtering and noise reduction, temperature compensation and multi-parameter fusion calculation on each parameter signal to obtain a standardized concentration feature set; Step 3: Determine the basic batching and conveying conditions based on the batching side parameters and conveying side parameters, determine the current pulping and conveying conditions in conjunction with the standardized concentration feature set, and generate corresponding control commands and safety protection commands; Step 4: Adjust the parameters of the slurry preparation process according to the control instructions, execute the graded interlocking action according to the safety protection instructions, and feed back the adjusted operating status to the multi-source parameter acquisition module.

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