Model selection matching evaluation method and system for hydraulic system of fully mechanized coal mining face

Abstract

The invention provides a model selection matching evaluation method and system for a hydraulic system of a fully mechanized coal mining face, and particularly relates to the technical field of fully mechanized coal mining face automation. The method comprises the following steps: acquiring user input information which covers bracket system parameters and pipeline system parameters and is respectively applied to corresponding systems; matching a model selection matching evaluation strategy according to the input information, if the model selection matching evaluation strategy corresponds to the bracket system, calculating the bracket moving speed of the bracket by using a bracket moving speed calculation model based on the parameters of the bracket system, and comparing the bracket moving speed with a bracket moving speed demand value preset by a user to judge the model selection matching property; if corresponding to the pipeline system, calculating the total resistance loss of the pipeline by means of a pipeline resistance loss calculation model based on the parameters of the pipeline system, and judging the type selection matching according to whether the total resistance loss exceeds a preset expected range or not. The method solves the problem that the system matching cannot be quantitatively evaluated during model selection and design of the hydraulic system of the fully mechanized coal mining face, and realizes conversion from experience dependence to model driving.

Description

Technical Field

[0001] This invention relates to the field of automation technology for fully mechanized mining faces, and more specifically, to a method and system for selecting, matching, and evaluating the hydraulic system of a fully mechanized mining face. Background Technology

[0002] With the rapid development of domestically produced high-end hydraulic supports and their increasingly stringent reliability requirements under complex coal mining conditions, dynamic characteristic testing and optimization of hydraulic systems in fully mechanized mining faces have become crucial for improving hydraulic support reliability and ensuring safe production. The industry is evolving towards automation and intelligence, urgently requiring systematic design theoretical support. However, currently, in the selection and design of hydraulic supports, pump stations, and pipeline systems, enterprises still generally rely on traditional experience-based analogies. This over-reliance on experience, lacking unified theoretical calculation models and quantitative analysis methods, makes it difficult to systematically reveal the working characteristics and essential laws of hydraulic support systems. This results in hydraulic systems failing to achieve optimal performance configuration, not only wasting resources but also failing to meet the strategic needs of sustainable development and high-end equipment manufacturing.

[0003] To address the aforementioned issues, traditional technical solutions primarily employ a "design based on experience - experimental verification - iterative correction" approach. This involves designers first selecting components based on historical project data, then conducting extensive field or simulation tests to verify system performance, such as whether the support frame movement speed meets standards and whether pipeline resistance is excessive, followed by multiple adjustments. While this method can achieve system functionality to some extent, it is essentially a "trial and error" approach with significant drawbacks: First, it cannot proactively and quantitatively assess the overall system compatibility (such as the dynamic coupling relationship between the support frame, pump station, and pipelines) during the design phase, easily leading to performance bottlenecks due to insufficient coordination between components. Second, the iterative testing process is time-consuming and labor-intensive, significantly extending the design cycle, increasing development costs, and the correction results often rely on the experience of individual experts, lacking objective and unified evaluation standards, making it difficult to guarantee design accuracy and reliability.

[0004] In summary, the urgent problem to be solved is how to address the lack of unified modeling and collaborative analysis of the support frame, pump station, and pipeline system in the hydraulic system selection and design of fully mechanized mining faces, which leads to the inability to quantitatively assess the system compatibility. Summary of the Invention

[0005] The main objective of this invention is to provide a selection and matching evaluation method and system for the hydraulic system of a fully mechanized mining face, so as to at least solve the technical problem that the system matching cannot be quantitatively evaluated due to the lack of unified modeling and collaborative analysis of the support frame, pump station and pipeline system in the selection and design of the hydraulic system of the fully mechanized mining face. It realizes the transformation from experience-based to model-driven, and solves the core problem of the inability to quantitatively evaluate system matching.

[0006] To achieve the above objectives, the present invention provides a method and system for selecting, matching and evaluating the hydraulic system of a fully mechanized mining face.

[0007] In a first aspect, the present invention provides a method for selecting, matching, and evaluating the hydraulic system of a fully mechanized mining face, the method comprising: Obtain user input information, which includes support frame system parameters and piping system parameters, wherein the support frame system parameters are applied to the support frame system and the piping system parameters are applied to the piping system; The corresponding selection and evaluation strategy is matched based on the input information; If the selection matching evaluation strategy corresponds to the support frame system, then based on the parameters of the support frame system, the support frame moving speed is calculated through the moving speed calculation model, and the support frame system selection is judged as appropriate based on whether the support frame moving speed meets the user's preset moving speed requirement value. If the selection matching evaluation strategy corresponds to the pipeline system, then based on the pipeline system parameters, the total pipeline resistance loss is calculated through the pipeline resistance loss calculation model, and the matching of the pipeline system selection is determined according to whether the total pipeline resistance loss exceeds the preset expected range.

[0008] Specifically, the parameters of the support system include at least the system type, number of columns, support model, column cylinder diameter, column rod diameter, column stroke, column lowering stroke, push rod diameter, push cylinder diameter, push stroke, support center distance, and support weight; the calculation of the support system's moving speed based on the parameters of the support system, using a moving speed calculation model, includes: Calculate the back pressure of the liquid returning to the column based on the column cylinder diameter and the column rod diameter; Calculate the return flow rate of the drop column based on the back pressure of the drop column return liquid and the preset drop column return liquid resistance coefficient; The column lowering time is calculated based on the number of columns, the cylinder diameter of the column, the return flow rate of the column lowering, and the stroke of the column lowering. Obtain the pump station flow rate Q from the pump station system parameters. 泵 The column raising time is calculated based on the number of columns, the cylinder diameter of the columns, and the flow rate of the pump station. The area ratio of the lower and upper chambers of the pushing jack is calculated based on the diameter of the pushing cylinder and the diameter of the pushing rod. The pushing time of the pushing jack is calculated based on the obtained area ratio, the load of the support, the pushing stroke, the liquid inlet pressure of the pushing jack, the liquid inlet flow rate of the pushing jack, and the preset liquid return pressure of the pushing jack. The frame movement speed is calculated based on the center distance of the support, the column lowering time, the column raising time, and the pushing time of the pushing jack.

[0009] Specifically: The formula for calculating the back pressure of the column return fluid is: P 回 =(D1 2 -D2 2 ) / D1 2 ×P 额 ; The formula for calculating the return flow rate of the column is: Q 回 =(P 回 / k) 0.5 ; Where D1 is the cylinder diameter of the column, D2 is the rod diameter of the column, k is the resistance coefficient of the column return fluid, and P 额 This refers to the rated pressure of the pumping station.

[0010] Specifically: The formula for calculating the column lowering time is: T j =nL1 / (Q 回 ×10 6 / 60(3.14×D1 2 / 4)); The formula for calculating the column raising time is: T s =nL1 / (3.14×D1 2 / 4) / (Q 泵 ×10 6 / 60); The formula for calculating the pushing time of the pushing jack is: T y =F×L2 / (P T进 Q T进 -P T回 Q T进 / κ); The formula for calculating the moving speed of the support frame is: V 常 =60 × center distance of the support / (T) j +T s +T y ); In the formula, n is the number of columns, L1 is the column lowering stroke, F is the load on the support; κ is the area ratio of the lower cavity and the upper cavity of the jack, and κ = D3 2 / (D3 2 -D4 2D3 is the pusher cylinder diameter, D4 is the pusher rod diameter; L2 is the pusher stroke; P T进 To increase the hydraulic pressure of the jack, P T进 =P 额 ;P T回 To reduce the return pressure of the jack, P T回 =k 回 Q T回 2 Q T回 To increase the return flow rate of the jack, k 回 To shift the return fluid resistance coefficient, Q T回 = Q T进 / κ;Q T进 To increase the inlet flow rate of the jack, Q T进 = Q 泵 Q 泵 This refers to the flow rate of the pumping station.

[0011] Specifically: When the frame system is a conventional system, the actuators in the intermediate liquid supply circuit from the column to the oil tank are the column hydraulic control check valve, the main valve, the return liquid shut-off valve, and the liquid outlet pipeline. When the type of the frame system is a high-flow liquid supply system, the actuators in the intermediate liquid supply circuit from the column to the oil tank are the column hydraulic control check valve, the main valve, the high-flow liquid supply valve, the return liquid shut-off valve, and the liquid outlet pipeline. When the frame system is a rapid return system, the actuators in the intermediate liquid supply circuit from the column to the oil tank are the column hydraulic control check valve, the rapid return valve, the return circuit breaker valve, and the outlet pipeline.

[0012] Specifically, the pipeline system parameters include at least the liquid supply method, working face length, inlet pipe specifications, outlet pipe specifications, local resistance elements, inlet pipe length, and outlet pipe length. The calculation of the total pipeline resistance loss based on the pipeline system parameters using a pipeline resistance loss calculation model includes: obtaining the emulsion pump station type; determining the supply fluid density and kinematic viscosity based on the emulsion pump station type; and obtaining the local resistance coefficient of the local resistance element; obtaining the pump station flow rate from the pump station system parameters; calling the corresponding resistance loss calculation formula based on the liquid supply method; and calculating the friction loss and local resistance loss of the inlet pipe based on the pump station flow rate, the inlet pipe length, the inlet pipe specifications, the supply fluid density, and the kinematic viscosity; calculating the friction loss and local resistance loss of the outlet pipe based on the outlet flow rate, the outlet pipe length, the outlet pipe specifications, the supply fluid density, and the kinematic viscosity; and obtaining the total pipeline resistance loss based on the friction loss and local resistance loss of the inlet pipe and the outlet pipe.

[0013] Secondly, the present invention provides a selection and matching evaluation system for the hydraulic system of a fully mechanized mining face, wherein the evaluation system applies the evaluation method described in the first aspect, and the evaluation system includes: The strategy selection module is used to obtain user input information and match the corresponding selection and evaluation strategy based on the user input information; A frame movement speed calculation module, which is connected to the strategy selection module, is used to calculate the frame movement speed of the support frame based on the frame system parameters. A pipeline resistance loss calculation module, which is connected to the strategy selection module, is used to calculate pipeline resistance loss based on the pipeline system parameters; A matching module is connected to the moving speed calculation module and / or the pipeline resistance loss calculation module. The matching module is used to determine whether the selection of the support system is suitable based on the moving speed of the support and / or the total pipeline resistance loss, and / or to determine whether the selection of the pipeline system is suitable.

[0014] Thirdly, the present invention provides a computer device, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; When a processor executes a program stored in memory, it implements the steps of the evaluation method described in the first aspect.

[0015] Fourthly, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the evaluation method described in the first aspect.

[0016] Fifthly, the present invention provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the evaluation method described in the first aspect.

[0017] This application provides a method and system for selecting, matching, and evaluating the hydraulic system of a fully mechanized mining face. The method acquires user-input parameters for the support frame system and pipeline system, which are then applied to their respective systems. Based on the input information, a matching evaluation strategy is implemented. For the support frame system, the support frame's moving speed is calculated using a moving speed calculation model based on its parameters. This speed is then compared with the user's preset moving speed requirement to determine the support frame system's matching suitability. For the pipeline system, the total pipeline resistance loss is calculated using a pipeline resistance loss calculation model based on its parameters. The matching suitability of the pipeline system is determined based on whether it exceeds the preset expected range. This method solves the technical problem of the inability to quantitatively evaluate system matching in the hydraulic system selection and design of fully mechanized mining faces due to the lack of unified modeling and collaborative analysis. It achieves a shift from experience-based reliance to model-driven approaches, effectively quantifying and evaluating system matching suitability. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 A flowchart illustrating the selection, matching, and evaluation method for the hydraulic system of the fully mechanized mining face provided in this application; Figure 2 A connection diagram of the hydraulic system selection and matching evaluation system for the fully mechanized mining face provided in this application; Figure 3 A schematic diagram of the computer equipment structure for the selection, matching, and evaluation system of the hydraulic system for the fully mechanized mining face provided in this application; Figure 4 This is the liquid supply circuit of the conventional system provided in this application; Figure 5 This is the liquid supply circuit of the high-flow liquid supply system provided in this application; Figure 6 This is the liquid supply circuit of the rapid liquid return system provided in this application.

[0019] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein.

[0022] In this invention, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0023] This application provides a selection and matching evaluation method and system for the hydraulic system of a fully mechanized mining face. Addressing the problem that the matching performance of the hydraulic system in a fully mechanized mining face cannot be quantitatively evaluated due to the lack of unified modeling and collaborative analysis of the support frame, pump station, and pipeline system during the selection and design process, this application proposes an evaluation method. First, user input information containing parameters of the support frame system and the pipeline system is obtained, and a selection and matching evaluation strategy is then applied accordingly. For the support frame system, the support frame moving speed calculation model is used to calculate the moving speed and compare it with the required value to determine the matching performance. For the pipeline system, the total resistance loss is calculated using a pipeline resistance loss calculation model, and the matching performance is determined based on whether it exceeds the expected range, thus achieving a shift from experience-based reliance to model-driven approaches.

[0024] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0025] Figure 1 A flowchart illustrating the selection and matching evaluation method for the hydraulic system of a fully mechanized mining face provided in this application is shown below. Figure 1 The figure shows the selection and matching evaluation method for the hydraulic system of a fully mechanized mining face provided in this embodiment. The method includes: S101: Obtain user input information, including the support system parameters and the piping system parameters; The parameters of the support frame system are applied to the support frame system, and the parameters of the pipeline system are applied to the pipeline system.

[0026] S102: Match the corresponding selection and evaluation strategy according to the input information, wherein the selection and evaluation strategy corresponds to the support frame system or the pipeline system.

[0027] The specific implementation includes: In this embodiment, user input information is received through a graphical user interface (GUI) of hydraulic system selection and matching evaluation software running on a computer device. The GUI includes form areas specifically for entering parameters of the support frame system and form areas specifically for entering parameters of the piping system.

[0028] In the system parameter form area of ​​the bracket, users can enter the following specific parameter values ​​by keyboard input or selection from the drop-down menu: Bracket model: Enter character data, such as "ZY12000 / 28 / 60D".

[0029] System type: Select one of "Standard System", "High Flow Liquid Supply System" or "Rapid Liquid Return System" from the drop-down menu, for example, select "Standard System".

[0030] Number of columns: Enter an integer, such as "4".

[0031] Column cylinder diameter D1: Enter numerical data in millimeters (mm), for example, "400".

[0032] Post diameter D2: Enter numerical data in millimeters (mm), for example, "280".

[0033] Column travel: Enter numerical data in millimeters (mm), for example, "1800".

[0034] Column lowering stroke L1: Enter numerical data in millimeters (mm), such as "600". This parameter is part of the column stroke, specifically referring to the stroke during the column lowering phase.

[0035] Push cylinder bore D3: Enter numerical data in millimeters (mm), for example, "160".

[0036] Push rod diameter D4: Enter numerical data in millimeters (mm), for example, "85".

[0037] Push stroke L2: Input numerical data in millimeters (mm), for example, "900".

[0038] Center distance of the support: Enter numerical data in meters (m), for example, "1.75".

[0039] Support weight: Enter numerical data in tons (t), for example, "35".

[0040] The load F of the support: Input numerical data in kilonewtons (kN), for example, "12000".

[0041] In the piping system parameter form area, users can enter the following specific parameter values ​​via keyboard input or drop-down menu selection: Liquid supply method: Select one of "single inlet single return", "circular liquid supply" or "four inlet three return circular liquid supply" from the drop-down menu, for example, select "single inlet single return".

[0042] Working face length: Enter numerical data in meters (m), for example, "300".

[0043] Inlet pipe specifications: Enter character data to represent the nominal diameter, such as "DN50".

[0044] Outlet pipe specifications: Enter character data to represent the nominal diameter, such as "DN50".

[0045] Inlet pipe length: Enter numerical data in meters (m), for example, "300". This length is determined based on the working face length.

[0046] Discharge pipe length: Enter numerical data in meters (m), for example, "300". This length is determined based on the working face length.

[0047] Local resistance elements: These are specified by checking the options in the table, such as "90° elbow (quantity: 20)", "tee (quantity: 10)", "gate valve (quantity: 4)", etc. The software includes a built-in standard resistance coefficient lookup table for common local resistance elements.

[0048] In addition, users also need to enter the pump station flow rate Q_pump (unit: liters / minute, e.g., "800") and the pump station rated pressure P_pump in the pump station system parameter configuration interface associated with the software. 额 (Unit: megapascals (MPa), e.g., “31.5”).

[0049] The software performs basic format validation on all parameters input by the user, such as checking whether the values ​​are within a reasonable range and whether required fields have been filled in.

[0050] In step S102, the corresponding selection matching evaluation strategy is matched based on the input information. Specifically, after the user completes the parameter input and clicks the "Start Evaluation" button on the interface, the software program begins to execute the strategy matching logic. The program first reads the complete input information dataset obtained in step S101.

[0051] The program's internal preset evaluation strategy matching logic is a conditional statement, the pseudocode of which is as follows: If (the input set of "Stent System Parameters" is not empty) and (the user has explicitly selected the option to "Evaluate the Stent System"), then the "Selection Matching Evaluation Strategy" will be marked as "Corresponding to the Stent System". Otherwise, if (the input set of "piping system parameters" is not empty) and (the user has explicitly selected the option to "evaluate the piping system"), then the "selection matching evaluation strategy" will be marked as "corresponding to the piping system". In the actual software implementation, the graphical interface provides two independent checkboxes or buttons, labeled "Execute Scaffold Matching Evaluation" and "Execute Pipeline System Matching Evaluation," respectively. Users can choose to activate one or both. The program activates the corresponding strategy branch based on the user's selection. The matching logic does not involve complex artificial intelligence models but rather performs conditional routing based on explicit user input and selection.

[0052] After strategy matching is completed, the program transfers process control to the corresponding evaluation branch. If the strategy is marked as "corresponding to the support frame system", the program jumps to the support frame transfer speed calculation module in step S103; if the strategy is marked as "corresponding to the pipeline system", the program jumps to the pipeline resistance loss calculation module in step S104.

[0053] Steps S101 to S102 of this document complete the accurate collection and verification of all necessary parameters through a standardized graphical interface, and realize the automatic matching of evaluation strategies based on clear conditional judgment logic. This lays an accurate and reliable data foundation and a clear process guide for subsequent special quantitative calculations and matching evaluations of the support system or pipeline system, ensuring the standardization and repeatability of the entire evaluation process.

[0054] S103: If the selection matching evaluation strategy corresponds to the support frame system, then based on the support frame system parameters, the support frame moving speed is calculated through the moving speed calculation model, and the support frame system selection is judged as matched based on whether the support frame moving speed meets the user's preset moving speed requirement value.

[0055] The system parameters of the support frame include at least the system type, number of columns, support model, column cylinder diameter, column rod diameter, column stroke, column lowering stroke, push rod diameter, push cylinder diameter, push stroke, support center distance, and support weight. Specifically, the step of calculating the support frame's moving speed based on the support frame system parameters using a moving speed calculation model includes: calculating the column lowering return fluid back pressure according to the column cylinder diameter and the column rod diameter; calculating the column lowering return fluid flow rate according to the column lowering return fluid back pressure and a preset column lowering return fluid resistance coefficient; calculating the column lowering time according to the number of columns, the column cylinder diameter, the column lowering return fluid flow rate, and the column lowering stroke in the column stroke; obtaining the pump station flow rate from the pump station system parameters, and calculating the column lowering time according to the number of columns, the column lowering return fluid flow rate, and the preset column lowering return fluid resistance coefficient; and calculating the column lowering time according to the number of columns, the column lowering return fluid resistance coefficient, and the preset column lowering return fluid resistance coefficient. The column lifting time is calculated based on the column cylinder diameter and the pump station flow rate; the area ratio of the lower and upper chambers of the pushing jack is calculated based on the pushing cylinder diameter and the pushing rod diameter; the pushing time of the pushing jack is calculated based on the obtained area ratio, the support load, the pushing stroke, the pushing jack inlet pressure, the pushing jack inlet flow rate, and the preset pushing jack return pressure; the frame movement speed is calculated based on the support center distance, the column lowering time, the column lifting time, and the pushing time of the pushing jack.

[0056] Preferably, the formula for calculating the back pressure of the column return fluid is: P 回 =(D1 2 -D2 2 ) / D1 2 ×P 额 ; The formula for calculating the return flow rate of the column is: Q 回 =(P 回 / k) 0.5 Where D1 is the cylinder diameter of the column, D2 is the rod diameter of the column, k is the resistance coefficient of the column return fluid, and P 额 This refers to the rated pressure of the pumping station.

[0057] Preferably, the formula for calculating the column lowering time is: T j =nL1 / (Q 回 ×10 6 / 60(3.14×D1 2 / 4)); The formula for calculating the column raising time is: T s =nL1 / (3.14×D1 2 / 4) / (Q 泵 ×10 6 / 60); The formula for calculating the pushing time of the pushing jack is: T y =F×L2 / (P T进 Q T进 -P T回 QT进 / κ); The formula for calculating the moving speed of the support frame is: V 常 =60 × center distance of the support / (T) j +T s +T y ); In the formula, n is the number of columns, L1 is the column lowering stroke, F is the load on the support; κ is the area ratio of the lower cavity and the upper cavity of the jack, and κ = D3 2 / (D3 2 -D4 2 D3 is the pusher cylinder diameter, D4 is the pusher rod diameter; L2 is the pusher stroke; P T进 To increase the hydraulic pressure of the jack, P T进 =P 额 ;P T回 To reduce the return pressure of the jack, P T回 =k 回 Q T回 2 Q T回 To increase the return flow rate of the jack, k 回 To shift the return fluid resistance coefficient, Q T回 = Q T进 / κ;Q T进 To increase the inlet flow rate of the jack, Q T进 = Q 泵 Q 泵 This refers to the flow rate of the pumping station.

[0058] Optionally, when the frame system is a conventional system, the actuators in the intermediate liquid supply circuit from the column to the tank are a column hydraulic control check valve, a main valve, a return liquid shut-off valve, and an outlet pipe, respectively; when the frame system is a high-flow liquid supply system, the actuators in the intermediate liquid supply circuit from the column to the tank are a column hydraulic control check valve, a main valve, a high-flow liquid supply valve, a return liquid shut-off valve, and an outlet pipe, respectively; when the frame system is a rapid return liquid system, the actuators in the intermediate liquid supply circuit from the column to the tank are a column hydraulic control check valve, a rapid return liquid valve, a return liquid shut-off valve, and an outlet pipe, respectively.

[0059] S104: If the selection matching evaluation strategy corresponds to the pipeline system, then based on the pipeline system parameters, the total pipeline resistance loss is calculated through the pipeline resistance loss calculation model, and the matching of the pipeline system selection is determined according to whether the total pipeline resistance loss exceeds the preset expected range.

[0060] The pipeline system parameters include at least the liquid supply method, working face length, inlet pipe specifications, outlet pipe specifications, local resistance elements, inlet pipe length, and outlet pipe length; Specifically, the pipeline system parameters also include the length of the inlet pipe and the length of the outlet pipe; the calculation of the total pipeline resistance loss based on the pipeline system parameters using a pipeline resistance loss calculation model includes: obtaining the emulsion pump station type, determining the supply fluid density and kinematic viscosity according to the emulsion pump station type, and obtaining the local resistance coefficient of the local resistance element; obtaining the pump station flow rate in the pump station system parameters, calling the corresponding resistance loss calculation formula according to the supply method, and calculating the friction loss and local resistance loss of the inlet pipe based on the pump station flow rate, the length of the inlet pipe, the specifications of the inlet pipe, the density of the supply fluid, and the kinematic viscosity respectively; calculating the friction loss and local resistance loss of the outlet pipe based on the outlet flow rate, the length of the outlet pipe, the specifications of the outlet pipe, the density of the supply fluid, and the kinematic viscosity respectively; and obtaining the total pipeline resistance loss based on the friction loss and local resistance loss of the inlet pipe and the friction loss and local resistance loss of the outlet pipe.

[0061] The following are embodiments of the hydraulic system selection and matching evaluation method for fully mechanized mining faces provided in this application. The embodiments can complement and explain each other:

[0062] Example 1:

[0063] This embodiment provides a method for selecting, matching, and evaluating the hydraulic system of a fully mechanized mining face, including the following steps: The system obtains user input information and matches the corresponding selection and evaluation strategy based on the user input information; the input information includes the system parameters of the support frame, the pump station system parameters, and the pipeline system parameters.

[0064] Preferably, the parameters of the support system include at least the system type, number of columns, support model, column cylinder diameter, column rod diameter, column stroke, push rod diameter, push cylinder diameter, push stroke, support center distance, and support weight. The pump station system parameters include at least the pump station flow rate, the pump station rated pressure, the number of normal coal mining pump stations, and the emulsion pump station type. The pipeline system parameters include at least the liquid supply method, working face length, inlet pipeline specifications, outlet pipeline specifications, and local resistance elements.

[0065] The selection and matching evaluation strategy is as follows: If the input information includes the parameters of the support frame system, calculate the support frame moving speed based on the support frame system parameters, and determine whether the moving speed meets the user's needs. If the input information includes pipeline system parameters, the pipeline resistance loss is calculated based on the pipeline system parameters, and the pipeline system selection is judged to meet the user's needs based on whether the pipeline resistance loss exceeds the preset expected range.

[0066] Specifically, multiple parameters can be set by swiping down in the support system parameter setting interface.

[0067] It is understandable that the parameters of the pump station system are key factors in selecting and matching the parameters of the support frame and the pipeline system.

[0068] Typically, a pump station system includes an emulsion pump station supply system, a pure water pump station system, a distributed accumulator supply system, and a rapid pump control replenishment system.

[0069] Among them, the emulsion pump station group fluid supply system is the hydraulic support fluid supply system commonly used in the current working face. It is supplied and unloaded by multiple emulsion pumps. However, the output flow of the emulsion pump station is controlled in stages, which cannot achieve continuous output of the emulsion pump station flow. This causes the fluid supply system to fluctuate frequently and violently within the pressure range set by the unloading valve, resulting in large system impact and low efficiency.

[0070] The pure water pump station group liquid supply system uses pure water as the medium in the pump station system, and multiple water medium pump stations are used for liquid supply and unloading. Its performance is the same as that of the emulsion pump station group liquid supply system.

[0071] The distributed accumulator fluid supply system, equipped with an accumulator and a check valve on each hydraulic support, balances the contradiction between insufficient instantaneous high-flow supply and excessive average fluid supply capacity in the working face hydraulic system, improving the agility of the fluid supply system and reducing hydraulic system shock. However, the distributed accumulator fluid supply system increases the complexity of the system and introduces more uncertainties.

[0072] The rapid pump-controlled fluid replenishment system is an addition of a fast-response fluid replenishment circuit to the emulsion pump station fluid supply system during the rapid operation of the hydraulic support. It controls the flow rate of the replenishment pump through pressure feedback. However, the rapid pump-controlled fluid replenishment system is only suitable for small to medium power fluid supply systems. Adding fluid replenishment pump control to a large flow fluid supply system has little effect on the overall longwall mining face system.

[0073] As can be seen, the different liquid supply systems mentioned above have different advantages and disadvantages and are suitable for different scenarios. Therefore, users should choose the appropriate system based on their actual needs.

[0074] The selection and matching evaluation strategy is as follows: If the input information includes the parameters of the support frame system, calculate the support frame moving speed based on the support frame system parameters, and determine whether the moving speed meets the user's needs. If the input information includes pipeline system parameters, the pipeline resistance loss is calculated based on the pipeline system parameters, and the pipeline system selection is judged to meet the user's needs based on whether the pipeline resistance loss exceeds the preset expected range.

[0075] Example 2:

[0076] This embodiment provides a possible implementation for calculating the moving speed of the support frame based on the parameters of the pump station system and the parameters of the support frame system.

[0077] In this embodiment, calculating the support frame moving speed based on the support frame system parameters includes: The back pressure of the column return fluid is calculated based on the column cylinder diameter and the column rod diameter; specifically, the formula for calculating the back pressure of the column return fluid is: P 回 =(D1 2 -D2 2 ) / D1 2 ×P 额 D1 is the cylinder diameter of the column, D2 is the rod diameter of the column, and P 额 This refers to the rated pressure of the pumping station.

[0078] The flow rate of the liquid returning from the down column is calculated based on the back pressure of the liquid returning from the down column and the preset resistance coefficient of the liquid returning from the down column; Q 回 =(P 回 / k) 0.5 , where k is the resistance coefficient of the column return fluid.

[0079] In practical implementation, the column return resistance coefficient k is equal to the sum of the column return resistance coefficients of each actuator in the intermediate fluid supply circuit from the column to the oil tank.

[0080] Typically, this system is divided into three main categories: conventional system, rapid liquid return system, and high-flow-rate liquid supply system.

[0081] Preferred, such as Figure 4 As shown, when the system type is a conventional system, the actuators in the intermediate fluid supply circuit from the column to the oil tank are the column hydraulic check valve, main valve, return fluid shut-off valve, and outlet pipeline (also called return fluid pipeline). At this time, k = k i Let be the drop column return fluid resistance coefficient of the i-th actuator.

[0082] like Figure 5 As shown, when this system type is a high-flow-rate liquid supply system, the actuators in the intermediate liquid supply circuit from the column to the oil tank are the column hydraulic control check valve, main valve, high-flow-rate liquid supply valve, return liquid shut-off valve, and outlet pipeline. At this time, k = k i Let be the drop column return fluid resistance coefficient of the i-th actuator.

[0083] like Figure 6 As shown, when the system type is a rapid return system, the actuators in the intermediate fluid supply circuit from the column to the oil tank are the column hydraulic check valve, the rapid return valve, the return circuit breaker valve, and the outlet pipeline. At this time, k = k iLet be the drop column return fluid resistance coefficient of the i-th actuator.

[0084] The column lowering time is calculated based on the number of columns, the cylinder diameter of the columns, the return flow rate of the column lowering, and the stroke of the column lowering.

[0085] Formula for calculating column lowering time: T j =nL1 / (Q 回 ×10 6 / 60(3.14×D1 2 / 4)), where n is the number of columns and L1 is the column lowering stroke.

[0086] The column raising time is calculated based on the number of columns, the cylinder diameter of the columns, and the flow rate of the pump station.

[0087] Formula for calculating column raising time: T s =nL1 / (3.14×D1 2 / 4) / (Q 泵 ×10 6 / 60), where Q 泵 This refers to the flow rate of the pumping station.

[0088] The area ratio of the lower and upper chambers of the push jack is calculated based on the diameter of the push cylinder and the diameter of the push rod. The push time of the push jack is calculated based on the obtained area ratio, the load of the support, the push stroke, the liquid inlet pressure of the push jack, the liquid inlet flow rate of the push jack, and the preset liquid return pressure of the push jack.

[0089] Formula for calculating the pushing time of the jack: T y =F×L2 / (P T进 Q T进 -P T回 Q T进 / κ); In the formula, F is the load on the support; κ is the area ratio of the lower cavity to the upper cavity of the jack, and κ = D3 2 / (D3 2 -D4 2 D3 is the pusher cylinder diameter, D4 is the pusher rod diameter; L2 is the pusher stroke; P T进 To increase the hydraulic pressure of the jack, P T进 =P 额 ;P T回 To reduce the return pressure of the jack, P T回 =k 回 Q T回 2 Q T回 To increase the return flow rate of the jack, k 回 To shift the return fluid resistance coefficient, Q T回 =Q T进 / κ;QT进 To increase the inlet flow rate of the jack, Q T进 = Q 泵 Q 泵 This refers to the flow rate of the pumping station.

[0090] The frame movement speed is calculated based on the center distance of the support, the column lowering time, the column raising time, and the column pushing time.

[0091] The formula for calculating the moving speed of the support frame is: V 常 =60 × center distance of the support / (T) j +T s +T y ).

[0092] This embodiment establishes a phased, precise calculation model, decomposing the frame-moving process into three key action stages: column lowering, column raising, and pushing. Independent calculation paths are constructed for each stage, fundamentally overcoming the calculation bias caused by the oversimplification of complex processes in traditional methods. Furthermore, the model fully incorporates actual operating parameters such as the back pressure of the hydraulic fluid during column lowering, pipeline resistance coefficient, jack area ratio, and support load, ensuring that the calculation results accurately reflect the true operating state of the hydraulic system.

[0093] Furthermore, this method achieves a quantitative characterization of the dynamic response between the power source and the actuator by closely linking the pump station's output characteristics with the support structure parameters. This not only accurately reveals the coupling relationship within the system but also provides a clear basis for identifying performance bottlenecks. Based on the precise calculation of the time of each stage, the final integrated support movement speed result combines theoretical rigor with engineering practicality, and can directly support system compatibility evaluation and optimization decisions.

[0094] This refined calculation method forms a complete technical chain from parameter input and step-by-step calculation to result integration. It not only ensures the accuracy and reliability of the frame shifting speed assessment, but also provides scientific theoretical support and quantitative tools for the collaborative design, efficiency optimization and on-site commissioning of hydraulic systems.

[0095] Example 3:

[0096] This embodiment provides a possible implementation method for calculating pipeline resistance loss based on the pumping station system parameters and the pipeline system parameters.

[0097] The liquid supply methods at the working face include single-inlet single-outlet, circular liquid supply, and four-inlet three-outlet circular liquid supply. In practice, users arrange the liquid supply method at the working face according to the actual working conditions in the coal mine.

[0098] Once the liquid supply method for the working face is determined, the total resistance loss of the inlet and outlet pipes under the current configuration is calculated based on the working face length, inlet pipe specifications, outlet pipe specifications, and local resistance elements. If the total resistance loss of any pipe exceeds its preset range, the selection is deemed mismatched.

[0099] Specifically, the applicant found through analysis that when the working face is supplied with liquid in a single-inlet and single-outlet configuration, the total resistance loss of the inlet pipeline from the pump station system to the tail support is controlled within the range of 4 to 5 MPa, and the total resistance loss of the outlet is controlled within the range of 1 to 4 MPa.

[0100] When the working face uses a circular liquid supply method, the total resistance loss of the liquid inlet pipeline from the pump station system to the entire working face is controlled within the range of 4 to 6 MPa, and the total resistance loss of the liquid outlet is controlled within the range of 2 to 4 MPa.

[0101] When the working face uses a four-inlet, three-outlet, circular liquid supply method, the total resistance loss of the liquid inlet pipeline from the pump station system to the entire working face is controlled within the range of 4 to 6 MPa, and the total resistance loss of the liquid outlet is controlled within the range of 2 to 4 MPa.

[0102] In summary, regardless of the pipeline system layout, the total resistance loss of the inlet pipeline from the pump station system to the entire working face should be controlled within the range of 4 to 6 MPa, and the total resistance loss of the outlet pipeline should be controlled within the range of 2 to 4 MPa. The total resistance loss of the pipeline system includes local resistance loss and friction loss.

[0103] Therefore, in one embodiment, the preset expected range of total resistance loss of the inlet pipeline is set to 4-6 MPa, and the preset expected range of total resistance loss of the outlet pipeline is set to 2-4 MPa.

[0104] Specifically, the pipeline resistance loss is calculated based on the pipeline system parameters, including: The density and kinematic viscosity of the supply fluid are determined based on the type of emulsion pump station, and the local resistance coefficient of the local resistance element is obtained. The corresponding resistance loss calculation formula is applied according to the supply method, and the friction loss and local resistance loss of the inlet pipeline are calculated based on the pump station flow rate, inlet pipe length, inlet pipe specifications, supply fluid density, and kinematic viscosity. Similarly, the friction loss and local resistance loss of the outlet pipeline are calculated based on the outlet flow rate, outlet pipe length, outlet pipe specifications, supply fluid density, and kinematic viscosity. The total resistance loss of the pipeline is obtained by considering the frictional and local resistance losses of the inlet pipeline and the frictional and local resistance losses of the outlet pipeline.

[0105] Specifically, the total resistance loss of the inlet pipeline is calculated based on the friction loss and local resistance loss of the inlet pipeline, where the total resistance loss of the inlet pipeline = friction loss of the inlet pipeline + local resistance loss of the inlet pipeline; the total resistance loss of the outlet pipeline is calculated based on the friction loss and local resistance loss of the outlet pipeline, where the total resistance loss of the outlet pipeline = friction loss of the outlet pipeline + local resistance loss of the outlet pipeline.

[0106] In one possible embodiment, when calculating the friction loss of the inlet pipeline based on the pump station flow rate, inlet pipeline length, inlet pipeline specifications, supply fluid density, and kinematic viscosity, the Darcy-Weisbach formula is used: ΔP 沿程 = λ 进 ×(L 进 / d 进 ) × (ρ × v 进 ² / 2); Among them, L 进 d is the length of the inlet pipe. 进 The pipe diameter is the inlet pipe diameter. Generally, there's a direct correlation between pipe specifications (nominal diameter DN) and pipe diameter; for example, DN25 indicates a pipe diameter of 25mm. 进 v is the flow velocity in the inlet pipe. 进 =4×Q 泵 / (π × d 进 ²); ρ is the density of the supply fluid, λ 进 This is the friction coefficient along the inlet pipe, which is related to the Reynolds number Re and the pipe wall roughness.

[0107] The formula for local resistance loss in the inlet pipe is: ΔP 进局部 = k 进 ×(ρ×v 进 2 / 2), k 进 This refers to the local resistance coefficient in the inlet pipe, which is determined based on the type and number of local resistance elements; or k 进 = ρ / (2 * C d ² * A 进 ²), C d Let A be the flow coefficient. 进 This represents the area of ​​the minimum flow cross section of the local resistance element.

[0108] It can be understood that the sum of the local resistance losses of multiple local resistance elements in the liquid inlet pipeline is the local resistance loss of the liquid inlet pipeline.

[0109] In one possible embodiment, when calculating the friction loss of the outlet pipeline based on the outlet flow rate, outlet pipe length, outlet pipe specifications, supply fluid density, and kinematic viscosity, the Darcy-Weisbach formula is used: ΔP 沿程 = λ出 ×(L 出 / d 出 ) × (ρ × v 出 ² / 2); v 出 Let v be the flow velocity in the outlet pipe. 出 =4×Q 出 / (π × d 出 ²), L 出 Let d be the length of the outlet pipe. 出 Q is the diameter of the outlet pipe. 出 λ represents the outflow rate of the outlet pipe. 出 This is the friction coefficient of the outlet pipe, which is related to the Reynolds number Re and the pipe wall roughness.

[0110] The formula for the local resistance loss in the liquid outlet pipe is: ΔP 出局部 = k 出 ×(ρ×v 出 2 / 2), k 出 This refers to the local resistance coefficient in the liquid outlet pipe, which is mainly determined by the type and number of local resistance elements; or k 出 = ρ / (2 * C d ² * A 出 ²), C d Let A be the flow coefficient. 出 This represents the area of ​​the minimum flow cross section of the local resistance element.

[0111] It can be understood that the sum of the local resistance losses of multiple local resistance elements in the liquid outlet pipeline is the local resistance loss of the liquid outlet pipeline.

[0112] Specifically, the piping system parameters need to take into account the type of the rack system and the cylinder diameter of the support column. The specific configuration rules are as follows: The standard rack system configuration (i.e., when the rack system type is a standard system) is selected as follows: (1) Column jack cylinder diameter ≤ 250mm: 1) Each support unit is equipped with an electric backwash filter (or manual backwash filter) in its inlet pipe, with a flow rate of 500L / min; 2) The flow rates of the electro-hydraulic directional valve interface for each support frame are 200L / min and 125L / min, and the valve string corresponding to the column is a one-to-two configuration. 3) Install a 500L / min return liquid shut-off valve on the return liquid pipe of each bracket; 4) Each column is equipped with a 500L / min safety valve; 5) Each column is equipped with a 200L / min column hydraulic check valve; 6) Each support frame's pushing system is equipped with a 200L / min one-way locking mechanism and a 250L / min safety valve; 7) Each support frame is equipped with a 125L / min balance double lock and a 250L / min safety valve on its balance jack; 8) The flow rate of the hydraulic auxiliary valves configured for systems such as side push, bottom lifting, bottom adjustment, telescopic beam, side guard, slide plate, and front beam shall not be less than 125L / min.

[0113] (2) The cylinder diameter of the column jack is greater than 250mm and less than or equal to 420mm: 1) Each support unit is equipped with an electric backwash filter (manual backwash filter) in the inlet pipe, with a flow rate of 900L / min; 2) The flow rate of the electro-hydraulic directional valve interface of each support is 500L / min and 200L / min, and the valve string corresponding to the column is one-to-one. 3) Install a 900L / min return liquid shut-off valve on the return liquid pipe of each bracket; 4) Each column is equipped with a combination safety valve with a flow rate of 1000L / min and 250L / min; 5) Each column is equipped with a 480L / min column hydraulic check valve; 6) Each support frame's pushing system is equipped with a 480L / min one-way locking mechanism and a 250L / min safety valve; 7) Each support frame is equipped with a 500L / min double-sided balancing lock and a 250L / min safety valve on its balancing jacks; 8) The flow rate of the hydraulic auxiliary valves configured for systems such as side push, bottom lifting, bottom adjustment, telescopic beam, side guard, slide plate, and front beam shall not be less than 250L / min.

[0114] (3) The cylinder diameter of the column jack is greater than 420mm and less than or equal to 530mm: 1) Each support unit is equipped with an electric backwash filter (manual backwash filter) in the inlet pipe, with a flow rate of 900L / min; 2) The flow rates of the electro-hydraulic directional valve interfaces for each support frame are 500L / min and 200L / min, and the columns use a double valve string; 3) Install a 900L / min return liquid shut-off valve on the return liquid pipe of each bracket; 4) Each column is equipped with a combination safety valve with a flow rate of 1000L / min and 250L / min; 5) Each column is equipped with a column hydraulic control check valve with a flow rate of less than 800L / min; 6) Each support frame's pushing system is equipped with a 480L / min one-way locking mechanism and a 250L / min safety valve; 7) Each support frame is equipped with a 500L / min double-sided balancing lock and a 250L / min safety valve on its balancing jacks; 8) The flow rate of the hydraulic auxiliary valves configured for systems such as side push, bottom lifting, bottom adjustment, telescopic beam, side guard, slide plate, and front beam shall not be less than 250L / min.

[0115] (4) The cylinder diameter of the column jack is greater than 530mm: 1) Each support unit is equipped with an electric backwash filter (manual backwash filter) in the inlet pipe, with a flow rate of 900L / min; 2) The electro-hydraulic directional valve interface of each support has a flow rate of 1000L / min and 200L / min, and a 1600L / min fast return check valve is added; 3) Install a 900L / min return liquid shut-off valve on the return liquid pipe of each bracket; 4) Each column is equipped with a combination safety valve with a capacity of 4000L / min and 1000L / min; 5) Each column is equipped with a 1600L / min column hydraulic check valve; 6) Each support frame's pushing system is equipped with a 480L / min one-way locking mechanism and a 250L / min safety valve; 7) Each support frame is equipped with a 500L / min double-sided balancing lock and a 250L / min safety valve on its balancing jacks; 8) The flow rate of the hydraulic auxiliary valves configured for systems such as side push, bottom lifting, bottom adjustment, telescopic beam, side guard, slide plate, and front beam shall not be less than 250L / min.

[0116] Rapid liquid return system (i.e., when the system type of this rack is a rapid liquid return system) configuration selection: For column jacks with a cylinder diameter greater than or equal to 400mm but less than 450mm, a quick return valve is typically configured in the support system to improve the column lowering speed. The specific configuration is as follows: 1) Each support unit is equipped with an electric backwash filter (manual backwash filter) in the inlet pipe, with a flow rate of 900L / min; 2) The flow rates of the electro-hydraulic directional valve interfaces for each support frame are 500L / min and 200L / min, and the columns use a double valve string; 3) Install a 900L / min return liquid shut-off valve on the return liquid pipe of each bracket; 4) Each column is equipped with a combination safety valve with a flow rate of 1000L / min and 250L / min; 5) Each column is equipped with a 630L / min column hydraulic check valve and a 500L / min quick return valve; 6) Each support frame's pushing system is equipped with a 480L / min one-way locking mechanism and a 250L / min safety valve; 7) Each support frame is equipped with a 500L / min double-sided balancing lock and a 250L / min safety valve on its balancing jacks; 8) The flow rate of the hydraulic auxiliary valves configured for systems such as side push, bottom lifting, bottom adjustment, telescopic beam, side guard, slide plate, and front beam shall not be less than 250L / min.

[0117] High-flow-rate liquid supply system configuration (i.e., when this rack system is a high-flow-rate liquid supply system) selection: For column jacks with a cylinder diameter greater than 450mm and less than or equal to 530mm, the support system is generally equipped with a high-flow liquid supply valve, as detailed below: 1) Each support unit is equipped with an electric backwash filter (manual backwash filter) in the inlet pipe, with a flow rate of 900L / min; 2) The electro-hydraulic directional valve interface of each support has a flow rate of 500L / min and 200L / min. The column adopts a double valve string and is equipped with a 1000L / min high flow rate liquid supply valve. 3) Install a 900L / min return liquid shut-off valve on the return liquid pipe of each bracket; 4) Each column is equipped with a combination safety valve with a flow rate of 1000L / min and 250L / min; 5) Each column is equipped with an 800L / min column hydraulic check valve; 6) Each support frame's pushing system is equipped with a 480L / min one-way locking mechanism and a 250L / min safety valve; 7) Each support frame is equipped with a 500L / min double-sided balancing lock and a 250L / min safety valve on its balancing jacks; 8) The flow rate of the hydraulic auxiliary valves configured for systems such as side push, bottom lifting, bottom adjustment, telescopic beam, side guard, slide plate, and front beam shall not be less than 250L / min.

[0118] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0119] Example 4:

[0120] like Figure 2 As shown, based on the same inventive concept, this application also provides a selection and matching evaluation system for the hydraulic system of a fully mechanized mining face. The solution provided by this system is similar to the solution described in Embodiment 1, 2, or 3. Therefore, the specific limitations in one or more selection and matching evaluation system embodiments provided below can be found in the relevant limitations in Embodiment 1, and will not be repeated here.

[0121] The selection and matching evaluation system for the hydraulic system of the fully mechanized mining face includes: The strategy selection module is used to obtain user input information and match the corresponding selection and evaluation strategy based on the user input information; A frame movement speed calculation module, which is connected to the strategy selection module, is used to calculate the frame movement speed of the support frame based on the frame system parameters. A pipeline resistance loss calculation module, which is connected to the strategy selection module, is used to calculate pipeline resistance loss based on the pipeline system parameters; A matching module is connected to the moving speed calculation module and / or the pipeline resistance loss calculation module. The matching module is used to determine whether the selection of the support system is suitable based on the moving speed of the support and / or the total pipeline resistance loss, and / or to determine whether the selection of the pipeline system is suitable.

[0122] This embodiment details the specific hardware and software implementation of the hydraulic system selection and matching evaluation system for fully mechanized mining faces, aiming to ensure that those skilled in the art can build and implement the system without creative effort.

[0123] 1. System Overall Architecture and Hardware Infrastructure The selection and matching evaluation system is deployed in an industrial control computer or high-performance server. This system includes a multi-core central processing unit, random access memory, solid-state drive storage, gigabit Ethernet communication interface, display output interface (such as HDMI), and multiple user input interfaces (such as USB). These hardware components are electrically connected and exchange data via a system bus on the motherboard. The system runs a Windows Server or Linux operating system and has a Java runtime environment or Python interpreter installed to execute the evaluation system software.

[0124] 2. Module Implementation Methods and Direct Connections The evaluation system software is developed using a layered architecture. Its core functional modules include a strategy selection module, a moving speed calculation module, a pipeline resistance loss calculation module, and a matching module. These modules exist in the form of software code packages, and the connections between modules are achieved through explicit function calls and parameter passing.

[0125] 2.1 Strategy Selection Module Function: This module serves as the system's input scheduling center, responsible for receiving and parsing user instructions and deciding on subsequent calculation processes.

[0126] Implementation details: The strategy selection module includes a graphical user interface submodule and a logical judgment submodule. The graphical user interface submodule uses HTML5 and JavaScript technologies to draw a web form, which includes two independent button controls labeled "Execute Scaffold Matching Evaluation" and "Execute Pipeline System Matching Evaluation," respectively.

[0127] Connection Method and Data Flow: When the user clicks the "Execute Support System Matching Evaluation" button, the graphical user interface submodule captures the click event through a JavaScript event listener function. Subsequently, the logic judgment submodule calls an internal function named setEvaluationStrategy("strategyA") to set the strategy flag to "corresponding to the support system" and passes a JSON data object containing the support system parameters as a parameter to the entry function of the support system transfer speed calculation module. If the user clicks another button, the strategy flag is set to "corresponding to the piping system," and the piping system parameters are passed to the piping resistance loss calculation module.

[0128] 2.2 Frame Transfer Speed ​​Calculation Module Function: This module accurately calculates the support movement speed based on the parameters sent by the strategy selection module, providing key data for matching judgment.

[0129] Implementation details: The gantry transfer speed calculation module is an independent dynamic link library written in C++ to improve computational efficiency. Internally, the module encapsulates all functions implementing the gantry transfer speed calculation model, including the `calculateP_back()` function (for calculating the back pressure of the column return fluid during lowering), the `calculateQ_back()` function (for calculating the flow rate of the column return fluid during lowering), the `calculateT_j()`, `calculateT_s()`, and `calculateT_y()` functions (for calculating the column lowering, raising, and pushing times, respectively), and finally the `calculateV()` function (for calculating the gantry transfer speed).

[0130] Connection Method and Data Flow: This module receives the stent system parameter structure from the strategy selection module through a public application programming interface function, such as `doublecalculateVelocity(StructSupportParameters params)`. Internally, the module calls these functions sequentially, with the output of each function serving as the input parameter for the next, forming an internal data flow. The final calculated stent movement speed value (a double-precision floating-point number) is returned directly to the matching module.

[0131] 2.3 Pipeline Resistance Loss Calculation Module Function: This module is responsible for calculating the total resistance loss of the piping system and evaluating the rationality of the piping selection.

[0132] Specific implementation: This module is also implemented in the form of a software library. It mainly uses the Darcy-Weisbach formula to calculate the friction loss along the liquid inlet and outlet pipes, and uses the local resistance coefficient method to calculate the local resistance loss.

[0133] Connection Method and Data Flow: This module receives pipeline system parameters from the strategy selection module through an interface function called `double calculatePressureLoss(StructPipelineParameters params)`. Internally, the module selects the appropriate calculation branch based on the liquid supply method (e.g., single inlet, single return), calculates the resistance loss of the inlet and outlet pipelines respectively, sums them, and returns the total resistance loss value (in megapascals) as the return value, which is directly output to the matching module.

[0134] 2.4 Matching Module Function: This module is the system's decision-making unit. By comparing the calculation results with preset standards, it provides the final selection and matching conclusion.

[0135] Specific implementation: The matching module is a lightweight logic judgment module. The module internally stores the user's preset requirements for the moving speed (e.g., not less than 0.08 m / min) and the preset expected range of total pipeline resistance loss (e.g., 4~6 MPa for inlet pipeline and 2~4 MPa for outlet pipeline).

[0136] Connection Method and Data Flow: The matching module actively calls the output results of the mover speed calculation module or the pipeline resistance loss calculation module. Specifically, the matching module includes a judgment function that first reads the strategy flag set by the strategy selection module. If the strategy flag is "corresponding to the support system," the `calculateVelocity` function is called to obtain the mover speed, and this speed value is compared with the preset requirement value to determine whether the requirement is met (returning a Boolean value "true" or "false"). If the strategy flag is "corresponding to the pipeline system," the `calculatePressureLoss` function is called to obtain the total resistance loss and determine whether it is within the preset expected range (returning a Boolean value "true" or "false"). The final Boolean judgment result will be displayed to the user through a graphical user interface.

[0137] 3. System Integration and Operational Results This system constructs a complete automated evaluation process through the collaborative work of the four modules mentioned above. The strategy selection module ensures precise guidance of the evaluation path; the two calculation modules, based on specific physical models and mathematical formulas, transform complex engineering calculations into executable code, guaranteeing the accuracy and repeatability of the calculation results; and the matching module provides objective quantitative judgment criteria. This modular design makes the system structure clear, with well-defined responsibilities for each module. Direct function calls and data transfer ensure the system's efficient operation, ultimately achieving rapid, accurate, and automated evaluation of the matching suitability of the hydraulic system selection for fully mechanized mining faces, completely changing the traditional outdated model that relies on manual experience.

[0138] Example 5:

[0139] This embodiment provides a computer device, which may be a terminal, and its internal structure diagram may be as follows. Figure 3 As shown, the computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device.

[0140] The processor, memory, and input / output interfaces are connected via a system bus, while the communication interface, display unit, and input devices are also connected to the system bus via input / output interfaces. The processor provides computational and control capabilities. The memory of this computer device includes non-volatile storage media and internal memory.

[0141] The non-volatile storage medium stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage medium.

[0142] The computer device’s input / output interface is used for exchanging information between the processor and external devices.

[0143] The communication interface of this computer device is used to communicate with external terminals via wired or wireless means. Wireless communication can be achieved through WIFI, mobile cellular networks, NFC (Near Field Communication), or other technologies.

[0144] When the computer program is executed by the processor, it implements the method described in Example 1.

[0145] The display unit of this computer device is used to form a visually visible image and can be a display screen, a projection device, or a virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of this computer device can be a touch layer covering the display screen, or buttons, a trackball, or a touchpad set on the casing of the computer device, or an external keyboard, touchpad, or mouse, etc.

[0146] Those skilled in the art will understand that Figure 3 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0147] Example 6:

[0148] Based on the above embodiments, this embodiment provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps described in Embodiment 1.

[0149] Example 7:

[0150] Based on the above embodiments, this embodiment provides a computer program product, including a computer program, which, when executed by a processor, implements the steps described in Embodiment 1.

[0151] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0152] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0153] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0154] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A method for selecting, matching, and evaluating the hydraulic system of a fully mechanized mining face, characterized in that, The method includes: Obtain user input information, which includes support frame system parameters and piping system parameters, wherein the support frame system parameters are applied to the support frame system and the piping system parameters are applied to the piping system; The corresponding selection and evaluation strategy is matched based on the input information; If the selection matching evaluation strategy corresponds to the support frame system, then based on the parameters of the support frame system, the support frame moving speed is calculated through the moving speed calculation model, and the support frame system selection is judged as appropriate based on whether the support frame moving speed meets the user's preset moving speed requirement value. If the selection matching evaluation strategy corresponds to the pipeline system, then based on the pipeline system parameters, the total pipeline resistance loss is calculated through the pipeline resistance loss calculation model, and the matching of the pipeline system selection is determined according to whether the total pipeline resistance loss exceeds the preset expected range.

2. The method for selecting, matching, and evaluating the hydraulic system of a fully mechanized mining face according to claim 1, characterized in that, The parameters of the support system include at least the system type, number of columns, support model, column cylinder diameter, column rod diameter, column stroke, column lowering stroke, push rod diameter, push cylinder diameter, push stroke, support center distance, and support weight. The calculation of the support system's moving speed based on these parameters, using a moving speed calculation model, includes: Calculate the back pressure of the liquid returning to the column based on the column cylinder diameter and the column rod diameter; Calculate the return flow rate of the drop column based on the back pressure of the drop column return liquid and the preset drop column return liquid resistance coefficient; The column lowering time is calculated based on the number of columns, the cylinder diameter of the column, the return flow rate of the column lowering, and the stroke of the column lowering. Obtain the pump station flow rate Q from the pump station system parameters. 泵 The column raising time is calculated based on the number of columns, the cylinder diameter of the columns, and the flow rate of the pump station. The area ratio of the lower and upper chambers of the pushing jack is calculated based on the diameter of the pushing cylinder and the diameter of the pushing rod. The pushing time of the pushing jack is calculated based on the obtained area ratio, the load of the support, the pushing stroke, the liquid inlet pressure of the pushing jack, the liquid inlet flow rate of the pushing jack, and the preset liquid return pressure of the pushing jack. The frame movement speed is calculated based on the center distance of the support, the column lowering time, the column raising time, and the pushing time of the pushing jack.

3. The method for selecting, matching, and evaluating the hydraulic system of a fully mechanized mining face according to claim 2, characterized in that: The formula for calculating the back pressure of the column return fluid is: P 回 =(D1 2 -D2 2 ) / D1 2 ×P 额 ; The formula for calculating the return flow rate of the column is: Q 回 =(P 回 / k) 0.5 ; Where D1 is the cylinder diameter of the column, D2 is the rod diameter of the column, k is the resistance coefficient of the column return fluid, and P 额 This refers to the rated pressure of the pumping station.

4. The method for selecting, matching, and evaluating the hydraulic system of a fully mechanized mining face according to claim 2, characterized in that: The formula for calculating the column lowering time is: T j =nL1 / (Q 回 ×10 6 / 60(3.14×D1 2 / 4)); The formula for calculating the column raising time is: T s =nL1 / (3.14×D1 2 / 4) / (Q 泵 ×10 6 / 60); The formula for calculating the pushing time of the pushing jack is: T y =F×L2 / (P T进 Q T进 -P T回 Q T进 / κ); The formula for calculating the moving speed of the support frame is: V 常 =60 × center distance of the support / (T) j +T s +T y ); In the formula, n is the number of columns, L1 is the column lowering stroke, F is the load on the support; κ is the area ratio of the lower cavity and the upper cavity of the jack, and κ = D3 2 / (D3 2 -D4 2 D3 is the pusher cylinder diameter, D4 is the pusher rod diameter; L2 is the pusher stroke; P T进 To shift the hydraulic pressure of the jack, P T进 =P 额 ;P T回 To reduce the return pressure of the jack, P T回 =k 回 Q T回 2 Q T回 To increase the return flow rate of the jack, k 回 To shift the return fluid resistance coefficient, Q T回 = Q T进 / κ;Q T进 To increase the inlet flow rate of the jack, Q T进 = Q 泵 Q 泵 This refers to the flow rate of the pumping station.

5. The method for selecting, matching, and evaluating the hydraulic system of a fully mechanized mining face according to claim 1, characterized in that: When the frame system is a conventional system, the actuators in the intermediate liquid supply circuit from the column to the oil tank are the column hydraulic control check valve, the main valve, the return liquid shut-off valve, and the liquid outlet pipeline. When the type of the frame system is a high-flow liquid supply system, the actuators in the intermediate liquid supply circuit from the column to the oil tank are the column hydraulic control check valve, the main valve, the high-flow liquid supply valve, the return liquid shut-off valve, and the liquid outlet pipeline. When the frame system is a rapid return system, the actuators in the intermediate liquid supply circuit from the column to the oil tank are the column hydraulic control check valve, the rapid return valve, the return circuit breaker valve, and the outlet pipeline.

6. The method for selecting, matching, and evaluating the hydraulic system of a fully mechanized mining face according to claim 1, characterized in that, The pipeline system parameters include at least the liquid supply method, working face length, inlet pipe specifications, outlet pipe specifications, local resistance elements, inlet pipe length, and outlet pipe length; the calculation of the total pipeline resistance loss based on the pipeline system parameters using a pipeline resistance loss calculation model includes: Obtain the type of emulsion pump station, determine the density and kinematic viscosity of the supply fluid based on the type of emulsion pump station, and obtain the local resistance coefficient of the local resistance element; Obtain the pump station flow rate from the pump station system parameters, call the corresponding resistance loss calculation formula according to the liquid supply method, and calculate the friction loss and local resistance loss of the liquid supply pipeline based on the pump station flow rate, the length of the liquid inlet pipe, the specifications of the liquid inlet pipe, the density of the liquid supply fluid, and the kinematic viscosity. The friction loss and local resistance loss of the outlet pipeline are calculated based on the outlet flow rate, the outlet pipeline length, the outlet pipeline specifications, the supply fluid density, and the kinematic viscosity. The total resistance loss of the pipeline is obtained based on the friction loss and local resistance loss of the inlet pipeline and the friction loss and local resistance loss of the outlet pipeline.

7. A selection and matching evaluation system for the hydraulic system of a fully mechanized mining face, characterized in that, The evaluation system applies the evaluation method according to any one of claims 1-6, and the evaluation system comprises: The strategy selection module is used to obtain user input information and match the corresponding selection and evaluation strategy based on the user input information; A frame movement speed calculation module, which is connected to the strategy selection module, is used to calculate the frame movement speed of the support frame based on the frame system parameters. A pipeline resistance loss calculation module, which is connected to the strategy selection module, is used to calculate pipeline resistance loss based on the pipeline system parameters; A matching module is connected to the moving speed calculation module and / or the pipeline resistance loss calculation module. The matching module is used to determine whether the selection of the support system is suitable based on the moving speed of the support and / or the total pipeline resistance loss, and / or to determine whether the selection of the pipeline system is suitable.

8. A computer device, characterized in that: It includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; A processor, when executing a program stored in memory, implements the steps of the evaluation method as described in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the evaluation method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the evaluation method according to any one of claims 1 to 6.

Images