40 results about "Loading rate" patented technology

The invention discloses a method for detecting steel slag single particle crushing characteristics, relates to the technical field of solid waste material particle detection, and develops steel slag single particle crushing detection through different loading rates and set quantitative form conditions based on the influence of form effect on steel slag single particle crushing strength. A single-particle crushing mode and crushing energy are obtained, and Weibull distribution is adopted to analyze the crushing strength of the particles, and the fitting discreteness of the particles is adopted to analyze the influence of the morphological effect and the external loading rate on the single-particle crushing of the steel slag. According to the method for detecting the crushing characteristics of the steel slag single particles, theoretical guidance and technical support are provided for whether the steel slag single particles as novel solid waste resources can be utilized in a diversified mode or not through the influence mechanism of the particle shape effect and the loading speed on the crushing strength, the crushing mode and the energy dissipation rule.

The invention provides a high earth and rockfill dam core wall pore water pressure test method, and belongs to the technical field of indoor soil mechanics tests. According to the method, the structure of a traditional compression consolidation apparatus is improved, a sealing steel barrel which is provided with a double-layer sealing ring and can lead out a wire harness is adopted, and a high-precision osmometer, a soil pressure meter and a high-frequency data acquisition system are combined, so that the compression consolidation apparatus can be fully sealed under the conditions of complete sealing and high pressure; and the generation and change rule of pore water pressure in the filling process of the core wall of the high earth-rock dam can be accurately simulated. The method comprises the steps of soil sample preparation, saturation treatment, instrument burying, graded loading, data acquisition and the like, and can be used for researching the influence of different water contents, loading rates and clay content on the pore water pressure. Test results show that the method can still keep good sealing and data stability under the condition of 5 MPa high pressure, has high precision, high repeatability and high reliability, and can provide scientific basis for high earth and rockfill dam core wall design and construction safety.

The present invention discloses a test device and method for simulating deformation and failure of snow-covered slopes, comprising a support frame, wherein a cross plate is provided between the uprights of the support frame, a bottom plate is fixedly connected between the cross plates, a sliding rod is fixedly provided between the top frames of the support frame, a slider is slidably connected to the sliding rod, and a pulley is rolled below the slider, and one side of the cross plate is connected to the support rod by a hinge. By adjusting the inclination angle between the inclined plate and the bottom plate, the slope of the frozen soil slope can be simulated, and experiments with different slopes can be realized. Secondly, the influence of the snow load on the stability of the granular slope is simulated by separating the lower shear box and the upper shear box. The changes of the granular particles and the snow sample during the separation process can be observed more directly, and the load size of the shear failure of the upper snow sample and the influence of the failure on the lower soil sample can be studied under the factors of changing the slope, load and loading rate, thereby solving the problem of lack of research devices in the prior art.

The invention provides an electric feedback regulation and control method and system for a structural sample loading process. The method is applied to the technical field of intelligent material testing and structural health monitoring, and comprises the following steps: in a single free surface loading state, collecting strain response, conductivity change, impedance spectrum and dielectric property evolution data of a sample, extracting an electrical feedback signal parameter set, and generating dynamic control parameters to adjust loading force and loading rate; collecting electrical signal time sequence data in real time, deducing spatial distribution of a damaged area, generating a potential distribution map, and analyzing a time sequence evolution trend of the potential distribution map; if the trend meets the preset instability criterion, the loading strategy is adjusted according to the loading strategy set, and the loading process is dynamically controlled. According to the invention, intelligent closed-loop control in the loading process is realized, the safety and accuracy of the loading test are improved, the damage evolution trend is monitored and identified in real time, the loading force and rate are dynamically adjusted, and the instability risk is effectively early warned.

The invention relates to the technical field of concrete, in particular to high-fluidity concrete and a preparation method thereof, and the high-fluidity concrete comprises the following components in parts by weight: 300-400 parts of cement; 800 to 1000 parts of aggregate; 80 to 120 parts of fly ash; 1.2 to 1.8 parts of a modified functional material; 3.5 to 5.0 parts of a composite microcapsule; 2-5 parts of a water reducing agent; 130 to 160 parts of water; wherein the modified functional material is a fly ash carrier of which the surface is loaded with a nano modifier, the nano modifier is a core-shell structure nanoparticle, the core is silicon dioxide, and the surface is sequentially grafted with a polycarboxylic acid branched chain and a calcium-responsive phosphonic acid ligand; according to the modified functional material, the loading rate of the nano-particles can reach 1.2-1.8% of the mass of the fly ash, the nano-particles are uniformly distributed, and the fly ash microspheres are used as an admixture and also used as an efficient carrier of the nano-particles, so that the uniform dispersion of the fly ash microspheres in the concrete is ensured.

The application discloses a reinforced concrete beam bending stiffness dynamic evaluation detection method, and particularly relates to the stiffness detection test field, which comprises the following steps: S1, arrangement processing, pretreatment of the test piece and arrangement of the support; S2, loading processing, a loading system and a monitoring module; S3, setting processing; S4, grading processing, grading stable loading and real-time collection of dynamic data; S5, correction; S6, calculation processing; S7, verification, verification of the stiffness stability and drawing of a three-dimensional dynamic evaluation atlas; and S8, detection report processing. The application precisely sets and strictly adapts the loading rate, the deviation allowable value and the load regression time to the environmental temperature, dynamically adjusts the allowable range of the load fluctuation, effectively suppresses the temperature sensitivity of the hydraulic system, achieves higher evaluation detection precision, and solves the problems of unstable loading rate, intensified load fluctuation and difficult achievement of higher evaluation detection precision.

The present invention provides a method for constructing an uncoupled blasting explosion load model and related equipment. By using piecewise functions to describe the uncoupled blasting explosion load in different time stages respectively, an uncoupled blasting explosion load theoretical model is established; through the uncoupled blasting pressure test experiment, the pressure-time curve is collected and waveform analysis is carried out to obtain mechanical parameters; the parameters in the uncoupled blasting explosion load theoretical model are calibrated by the mechanical parameters; the parameters in the uncoupled blasting explosion load theoretical model are input into a calculation program for calculation to obtain the uncoupled blasting explosion load model. The model provided by the present invention can more accurately describe the action characteristics of the uncoupled blasting explosion load. By directly inputting the peak value and the rise time respectively, the peak value and the loading rate of the explosion shock wave and the explosion-generated gas can be controlled, so that the dynamic response of the structure under different peak values and loading rates can be conveniently studied. It has the characteristics of simple model, few input parameters and wide applicability.

This invention proposes a method for testing the compressive strength of carbonized seawater sand concrete, comprising: preparing seawater sand concrete specimens and carbonizing them until fully carbonized; preloading and then unloading the specimens on a testing machine, followed by displacement-controlled loading; collecting data through strain gauges during the ascending phase, and switching to a displacement extensometer to collect deformation during the descending phase when the load reaches 70-80% of the peak load, while simultaneously reducing the loading rate until the specimen is completely destroyed; performing dimensionless processing on the two data segments, and using a two-segment model of polynomial ascending phase and rational fractional descending phase for least squares fitting to construct a full-curve constitutive relationship, effectively solving the data discontinuity problem caused by strain gauge detachment during the descending phase of highly brittle materials; the obtained model has a high goodness of fit and the physical meaning of the parameters is clear.

The present invention proposes a comprehensive evaluation test method and device for the dynamic instability characteristics of coal rock, which obtains coal rock samples; based on the uniaxial compressive strength of the coal rock samples, controls the uniaxial loading of the coal rock samples at different loading rates to obtain stress-strain relationship curves of the first and second stages before failure of the coal rock samples; calculates the first accumulated elastic energy and the first dissipated energy of the first stage, and the second accumulated elastic energy, the second dissipated energy and the post-peak loss energy of the second stage according to the stress-strain relationship curve; and then calculates the total residual release energy of the coal rock sample; and based on the equivalent dynamic failure time converted from the total residual release energy and the failure time, calculates the release rate of the total residual release energy to evaluate the dynamic instability characteristics of the coal rock. Therefore, by introducing uniaxial compressive strength, yield deviation, accumulated elastic energy and equivalent dynamic failure time, the release rate of the total residual release energy is calculated, thereby improving the accuracy and precision of evaluating the dynamic instability of the coal rock.

The invention discloses a buried pipeline visual test system and method for simulating a differential load effect, and belongs to the technical field of geotechnical engineering. The soil body model is filled in the test soil body container, and a test pipeline model is buried in the soil body model; the difference loading device is fixed above the upper sealing cover of the test soil body container, the difference loading device comprises a first servo electric cylinder and a second servo electric cylinder, and loading rods of the first servo electric cylinder and the second servo electric cylinder penetrate through a preset hole channel of the upper sealing cover to act on the lower soil body and the test pipeline model; the first servo electric cylinder and the second servo electric cylinder are different in specification, and the loading rate is independent and controllable; and the monitoring and data acquisition system comprises a stress sensor, a strain sensor and a pore water pressure sensor which are buried in the soil body model, and a pressure sensor and a displacement sensor which are arranged around the test pipeline model. According to the invention, the actual stress condition of the buried pipeline in the actual working condition can be better simulated.

The application discloses a detection device and method for cement mortar strength detection, and relates to the technical field of mechanical sensing detection. The detection device for cement mortar strength detection comprises a detection box, the detection box is fixedly connected with a mounting frame, the mounting frame is fixedly connected with a press, the loading head of the press is in contact with the middle part of a cement mortar sample, a plurality of sliding blocks are placed in the mounting frame, and a first spring is placed between adjacent sliding blocks and between the mounting frame and adjacent sliding blocks. In the loading process, the stress distribution change of the test piece in the stress process is monitored and recorded in real time through the uniformly distributed mechanical sensors, the change law of the internal stress of the material is understood by researchers, instant feedback in the loading process is provided, the loading rate can be ensured to meet the standard requirements, and the test result is prevented from being affected when any non-uniform loading is detected.

The present invention discloses a settlement prediction system based on soft soil creep, which relates to the technical field of settlement prediction. By collecting the loading rate of the foundation and the change of the groundwater level in real time, the stress increment, the total stress increment and the pore water pressure are dynamically calculated, and the vertical effective stress is further calculated based on these intermediate variables, so as to construct an accurate pore ratio calculation formula. This systematic process not only improves the accuracy of settlement prediction, but also enhances the adaptability of the model to the changes of actual working conditions. Specifically, through the collection and processing of real-time data, the present invention can quickly respond to the changes of foundation conditions and ensure that the model parameters are always in the optimal state. The pore ratio is calculated using the initial model parameters, and the error function is combined to evaluate the difference between the predicted value and the actual observed value, realizing the iterative optimization of the initial model parameters, and finally obtaining a corrected empirical model. The robustness and reliability of the model are significantly improved, making the settlement prediction more accurate and reliable.

The application discloses a kind of solidified sulphate saline soil bricks prepared by using constraint process, belongs to traffic engineering field.Its characteristics are: the preparation material of brick body includes soil body, solidifying agent, water;Soil body is sulphate saline soil with salt content of 1-50%, solidifying agent is composed of expansion component and cementing component, use the material that is fast hydration and generates expansion hydrate with soil sulfate ion as expansion component, use the material of slow hydration rate type as cementing component;Control the water content of sulphate saline soil and the water-cement ratio of solidifying agent, mix solidifying agent and sulphate saline soil uniformly and fill in brick mould and carry out compaction densification treatment, loading rate is 0.5-2.5cm / min, when peak load reaches 5-30MPa, keep the displacement of pressing plate fixed so that the brick body is constrained in mould, according to the specific material composition of solidifying agent, the brick body is removed from mould after curing 1-3 days under constraint condition and standard curing is carried out to 28 days to obtain solidified sulphate saline soil brick with high strength and good durability.

The present invention provides a preparation method and application of a magnetic biochar adsorption material, and relates to the technical field of biochar adsorption materials. The above-mentioned adsorption material is prepared by using three kinds of biomass, namely municipal sludge, straw and antimony mine waste residue, as biochar sources, and further loading magnetic nano-γ-Fe2O3 particles. In the above process, by controlling the quality of municipal sludge, straw and antimony mine waste residue, the composition and performance of the biochar substrate in the adsorption material can be regulated, and the rich active sites in the sludge and straw can be fully utilized to achieve the loading of magnetic nano-γ-Fe2O3 particles. The microfibril structure in the straw and the high-activity mesoporous carrier in the antimony mine waste residue can not only improve the loading rate of the magnetic nano-γ-Fe2O3 particles to a certain extent, but also facilitate the diffusion and capture of heavy metal ions during the application process, thereby improving the adsorption rate of the material to heavy metal ions as a whole.

The invention belongs to the technical field of prestressed pipe pile end testing, provides prestressed pipe pile end bearing capacity testing equipment, aims to solve the problems of misjudgment and influence on engineering safety caused by violation of the loading rate of an existing static load test, and provides the prestressed pipe pile end bearing capacity testing equipment. Comprising a stress misjudgment risk interval identification module for acquiring a real-time stress loading rate, identifying overspeed rate times, clustering and analyzing an overspeed rate interval, and identifying a risk interval by using a random forest in combination with historical cases; the bearing capacity hysteresis deformation output module is used for predicting the deformation of the current risk interval by using multiple linear regression in combination with historical cases; and the bearing capacity lagging deformation revision module verifies the deformation matching, determines and verifies a correction coefficient, and revises the current deformation.

The application discloses a method for detecting single-particle crushing characteristics of steel slag, and relates to the technical field of solid waste material particle detection, and is based on the influence of morphological effect on the single-particle crushing strength of steel slag. The single-particle crushing detection of steel slag is carried out under different loading rates and set quantitative morphological conditions, the single-particle crushing mode and crushing energy are obtained, the crushing strength of the particle is analyzed by using the Weibull distribution, and the influence of the morphological effect and the external loading rate on the single-particle crushing of steel slag is analyzed by using fitting discreteness. The method for detecting single-particle crushing characteristics of steel slag provides theoretical guidance and technical support for whether the single-particle of steel slag can be diversifiedly utilized as a new solid waste resource by the influence mechanism of particle morphological effect and loading speed on the crushing strength, crushing mode and energy dissipation law.

The application discloses a reclamation and filling soil and dynamic construction method of dikes and weirs based on settlement monitoring, and belongs to the technical field of geotechnical engineering monitoring and construction control. In order to solve the problems of low settlement monitoring precision, large environmental interference and lack of dynamic closed-loop control in the existing construction, a multi-source three-dimensional monitoring network is constructed and connected to a decentralized data transmission network; a double-factor correction model of tidal phase difference and salt spray corrosion is introduced to automatically calibrate environmental errors; a deep learning model embedded with one-dimensional consolidation theory constraints is used to predict post-construction settlement and differential settlement trends, and when the threshold is exceeded, a graded loading rate, intermittent standing time and partition reinforcement scheme are generated; the control command is pushed to the field terminal and the equipment is flexibly linked; the iterative monitoring-correction-prediction-decision-execution closed-loop process is continued until the design standard is reached. The application is mainly used for intelligent control of the dynamic construction of reclamation and filling soil and dikes and weirs, and can improve the settlement control precision and construction safety.

This invention discloses a dust-proof coal mine conveying equipment and its usage method. The method constructs a multiphase microstructure model of recycled aggregate, couples the discrete element method with a particle crushing algorithm, simulates the crack propagation and crushing evolution law of recycled aggregate during the crushing process, and establishes a quantitative correlation between aggregate strength and microstructure parameters based on the simulation results. This invention introduces a real-time crushing energy feedback mechanism and a multi-objective optimization algorithm to synergistically optimize aggregate gradation, loading rate and boundary conditions, thereby improving simulation accuracy and computational efficiency, and achieving accurate prediction of the crushing strength and crushing morphology of recycled aggregate.

The invention discloses a detection device and a detection method for detecting the strength of cement mortar, and relates to the technical field of mechanical sensing detection. A detection device for detecting the strength of cement mortar comprises a detection box, the detection box is fixedly connected with an installation frame, the installation frame is fixedly connected with a press machine, a loading head of the press machine makes contact with the middle of a cement mortar sample, a plurality of sliding blocks are arranged in the installation frame, and first springs are arranged between the adjacent sliding blocks and between the installation frame and the adjacent sliding blocks. In the loading process, the stress distribution change condition of the test piece in the stress process is monitored and recorded in real time through the uniformly distributed mechanical sensors, researchers are helped to understand the change rule of the internal stress of the material, and the loading rate can be ensured to meet the standard requirement by providing instant feedback in the loading process; and when any non-uniform loading condition is detected, the non-uniform loading is stopped in time, so that the influence on a test result is avoided.

The invention provides a comprehensive evaluation test method and device for coal rock dynamic instability characteristics. The method comprises the following steps: acquiring a coal rock sample; based on the uniaxial compressive strength of the coal rock sample, uniaxial loading of the coal rock sample is controlled at different loading rates, and stress-strain relation curves of the first stage and the second stage before damage of the coal rock sample are obtained; calculating first accumulated elastic energy and first dissipated energy in the first stage and second accumulated elastic energy, second dissipated energy and post-peak loss energy in the second stage according to the stress-strain relation curve; calculating to obtain the total residual released energy of the coal rock sample; and calculating the release speed of the total residual released energy based on the total residual released energy and the equivalent dynamic failure time converted from the failure time so as to evaluate the dynamic instability characteristic of the coal rock, thereby calculating the release speed of the total residual released energy by introducing the uniaxial compressive strength, the yield deviation degree, the accumulated elastic energy and the equivalent dynamic failure time, and evaluating the dynamic instability characteristic of the coal rock. And the accuracy and precision of evaluating the dynamic instability of the coal rock are improved.

This invention relates to the field of dry quenching coke calculation technology, and particularly to a method for calculating the coke discharge rate and coke loading rate of dry quenching coke. The method includes data acquisition and processing; identifying the loading cycle; calculating the average coke loading amount for each loading cycle; grouping the data based on the loading cycle and calculating the average amplitude of the loading cycle; constructing an amplitude-coke discharge rate prediction model; calculating the total material mass within the dry quenched coke based on the coke level, and calculating the coke loading rate by combining the coke discharge rate with the change in material mass. The advantages of this invention are: it eliminates excessive reliance on real-time belt scale data; by combining long-term historical data for statistical analysis and introducing precise calculation of the coke loading amount, it significantly reduces the interference caused by instantaneous operating condition fluctuations, equipment errors, and "suspended material" phenomena on the coke discharge rate calculation; and by using statistical averaging and multi-cycle fitting methods, it makes the correspondence between amplitude and coke discharge rate more stable and reliable, improving the overall calculation accuracy and robustness.

The invention discloses a sand shale interbed crack formation mechanism and evolution mode analysis method, which comprises the following steps of: setting a reasonable rock sample loading rate and shortening rate by using a particle flow numerical simulation technology according to a macroscopic structure style, and further implementing a rock mechanics experiment with a variable loading rate; the fracture strength and stress-strain evolution maps of sand / mudstone under different loading rate conditions are constructed, so that a sand / mudstone interbed fracture development mechanism under a strong stress rapid extrusion environment is disclosed, an interbed type artificial sample is prepared by using an underground sand / mudstone core sample from the similar perspective of three aspects of material composition, mechanical properties and an interbed structure, and the interbed type artificial sample is used for detecting the interbed fracture of the sand / mudstone. A loading type synchronous CT scanning experiment and a three-dimensional acoustic emission source positioning experiment are carried out, the rock fracture process is visualized, and the composite rock mass fracture evolution process is revealed. The method has important theoretical and practical values for improving the exploration success rate of the fractured gas reservoir, widening the exploration and development field and optimizing the reservoir transformation strategy.

The invention discloses a carry-scraper with the adjustable gravity center, and belongs to the field of hydraulic engineering, the carry-scraper comprises a vehicle main body, a moving unit and a working assembly which are arranged on the vehicle main body, a cab fixedly connected to the vehicle main body, and a bucket connected with the working assembly, and the interior of the bucket is connected with a material pushing unit; the material pushing unit comprises a material shoveling base, a lower material pushing plate, an upper material pushing plate and a material pushing driving part, wherein the two ends of the material shoveling base are in sliding connection with the inner wall of the bucket, the lower material pushing plate is rotationally connected to the upper end of the material shoveling base, the upper material pushing plate is rotationally connected with the other end of the lower material pushing plate, and the material pushing driving part is located in the bucket and connected with the material shoveling base. Materials in the bucket can be directly pushed from back to front through movement of the lower material pushing plate and the upper material pushing plate, so that material flow is forced to leave the bucket wall and the bucket bottom, the arch bridge and suspension phenomena of the materials are destroyed, the materials are integrally collapsed and discharged, most of the materials can be pushed out only through one complete stroke, and the material pushing efficiency is improved. Cross contamination is reduced, the loading rate is increased, the unloading time is greatly shortened, and the unloading efficiency is improved.

The present invention discloses a method for judging pile head damage in a static load test of a pile foundation. The method comprises the following steps: installing the equipment required for the static load test; setting the total number of load application levels; calculating the target load control value for each load application level, and applying the load through an oil pump; calculating the average value of the pile displacement change and the average value of the pile pressure change recorded each time during the time of applying the current load level; and calculating the judgment value k. i and the oil pump loading rate, according to the judgment value k i The invention can distinguish and warn the oil pump power and pile damage, and can estimate the later loading time.

This invention provides a method for calculating the load of mining dump trucks. It establishes the interaction relationship between two particles resting at the corner of the cargo box and the side and bottom plates of the cargo box, obtaining the forces exerted on the particles by the side and bottom plates. It provides strong and weak frictional solutions, extending the interaction relationship to the entire cargo box material, obtaining the forces exerted on the material by the side and bottom plates, and providing a critical value for the comprehensive friction coefficient. It establishes a multi-point support model and a porosity model for the material particles, identifies the relationship between the particle stacking angle and the number of particle support points, and combines the actual cargo box loading rate with the porosity model to establish the relationship between the loading rate and the number of particle support points. It determines a suitable multi-point support model for particles, establishes the relationship between the finite element mesh size and the material particle size, and establishes the force distribution relationship between the side and bottom plates of the cargo box on the material particles based on the finite element mesh. This invention can effectively cover all road conditions in the actual operating environment of mining dump trucks.

The invention provides a triaxial drainage shear test mechanical parameter determination method for reducing the fine grain amount of wide graded soil, which comprises the following steps: determining the range of a permeability coefficient k, and dissipating the pore pressure of a large triaxial apparatus sample in a drainage shear test at an allowable test loading rate; in order to guarantee the range of the permeability coefficient k, the percentage of the content of fine-grained soil is reduced; and correspondingly correcting the parameters of the Duncan model according to the change of the content of the fine-grained soil. The permeability is improved by properly reducing the content of fine particles, so that the large triaxial drainage shear test time is shortened, and the engineering aging requirement is met. And the quantitative relationship among the permeability coefficient, the fine particle content and the stress state is established, the required fine particle content can be reversely deduced according to the target test time, and the test predictability is improved. The method comprises the following steps: firstly, testing a fine-grain-reduced sample to obtain data, and then correcting parameters of the Duncan model through mid-triaxial comparison, so that feasibility and accuracy are both considered. The method solves the problem that the drainage test of the low-permeability soil is difficult to carry out, and has important engineering application value.

The invention discloses a method for testing the crack resistance of a prefabricated curved plate of a thin-wall concrete irrigation canal. The method comprises the following steps: measuring key dimension parameters of the prefabricated concrete curved plate; building a three-point bending test loading platform; performing stress state classification on the prefabricated curved plates according to the position of the action point of the resultant force of the water pressure; calculating a horizontal positioning parameter of a load acting point and a base supporting height parameter, and completing positioning of loading and supporting; calculating a loading maximum value based on a bidirectional load synthesis effect, and applying the load according to a set loading rate; calculating a fatigue lower limit equivalent value under the action of a bidirectional load, and implementing multi-cycle fatigue loading; after the loading is stopped, the cracking or damage state of the prefabricated concrete curved plate is observed, the crack width is detected, and an anti-cracking performance evaluation conclusion is given in combination with standard requirements. According to the method, the synthetic action of water pressure, top pressure beams and live loads in different directions in actual loads is comprehensively considered, and the crack resistance of the prefabricated bent plates of different sizes is accurately and directly evaluated.

This invention relates to the field of intelligent loading technology for power materials, specifically disclosing a multi-dimensional physical constraint-based loss-prevention loading method for power materials based on industrial big data. The method includes: responding to a loading request by acquiring associated industrial big data, which at least includes power material data, transport vehicle data, and cross-regional road condition data; based on the industrial big data, constructing a material object model and a vehicle object model containing geometric and physical attributes, and generating an initial candidate loading queue. This invention achieves comprehensive control from geometric boundaries to dynamic mechanics by constructing a multi-dimensional physical constraint hierarchical verification mechanism. Specifically, it utilizes dynamic overturning compensation logic to intelligently identify the hidden instability risks of high-center-of-gravity materials without reducing the overall loading rate, and eliminates overturning hazards through virtual grouping and binding technology, effectively resolving the contradiction between dynamic safety and loading efficiency for high-center-of-gravity materials.

The application relates to the technical field of concrete, in particular to high-fluidity concrete and a preparation method thereof, which comprises the following components in parts by weight: cement 300-400 parts; aggregate 800-1000 parts; fly ash 80-120 parts; modified functional material 1.2-1.8 parts; composite microcapsule 3.5-5.0 parts; water reducing agent 2-5 parts; and water 130-160 parts; wherein the modified functional material is fly ash carrier with a surface loaded nano modifier, the nano modifier is a core-shell structure nanoparticle, the inner core is silicon dioxide, and the surface is sequentially grafted with a polycarboxylic acid branched chain and a calcium-responsive phosphonic acid ligand; the modified functional material can make the nanoparticle loading rate reach 1.2-1.8% of the mass of the fly ash, and the distribution is uniform; the fly ash microbead not only acts as an admixture, but also serves as an efficient carrier of the nanoparticle, so that the uniform dispersion of the nanoparticle in the concrete is ensured.

The invention provides a production scheduling method and device of a mining area production line, terminal equipment and a medium. The method comprises the steps of determining a periodic production plan of the mining area production line; determining grouped excavator configuration of the excavator groups according to the mining platform and the periodic production plan of the mining area production line; determining a first decision variable and a second decision variable according to the excavator group and the grouped excavator configuration; the first decision variable represents a planned mine car type corresponding to each excavator group and a planned mine car number corresponding to each planned mine car type; the second decision variable represents the planned loading rate of each excavator; determining a target function according to scheduling benefits, and determining constraint conditions according to mining area production line information; and setting a production scheduling optimization model of the mining area production line, carrying out optimization solution on the production scheduling optimization model, and determining production scheduling configuration results respectively corresponding to the first decision variable and the second decision variable. The method can ensure that the mining area production line can achieve the goal of dispatching benefit maximization.