50 results about "Plastic viscosity" patented technology

The invention discloses a graft polymer and a preparation method and application thereof.The graft polymer comprises a structural unit I from graphene oxide, a structural unit II from a monomer A and a structural unit III from a monomer B. The value of the carbon element and the oxygen element of the graphene oxide is not larger than 2.5; the monomer A is a monomer containing a sulfonic acid group; the monomer B is a propenyl monomer containing a rigid group; the viscosity average molecular weight of the graft polymer is 75,000 to 120,000. The graft polymer disclosed by the invention can be used as an ultrahigh-temperature salt-resistant shear strength improving agent for water-based drilling fluid, the temperature resistance can reach 240 DEG C or above, the salt resistance can reach saturation, and the influence on the plastic viscosity of the drilling fluid is less while the shearing force of the drilling fluid is increased.

The invention discloses an ultra-fine powder-small molecule alcohol biphase synergistic UHPC viscosity reducer and a preparation method thereof, and belongs to the technical field of building material admixtures. Ultra-fine powder is adopted for preparing a viscosity reduction admixture, dense accumulation is achieved through multi-scale particle filling, friction force among particles is reduced, a particle system with continuous grading is formed, and therefore the viscosity reduction admixture is prepared. The free water requirement is reduced, and the slurry flowability is remarkably improved; meanwhile, through the dispersion effect of the polycarboxylic acid high-performance water reducing agent, lubrication and hydration regulation and control of the small molecular alcohol, the air entraining agent and the defoaming agent synergistically optimize a bubble system, and the retarder delays the hydration process, a multi-scale synergistic viscosity reduction mechanism is formed, the yield stress and the plastic viscosity of the slurry are remarkably reduced, and meanwhile, high strength and durability are kept; the method is suitable for efficient viscosity reduction and working performance optimization of a UHPC system with a low water-binder ratio.

Drilling fluid compositions may include a weighting agent, a nitrite-containing compound, and an ammonium-containing compound, where the nitrite-containing compound and the ammonium-containing compound may be encapsulated together in copolymer micro-particles forming encapsulated thermochemical compounds, and where at least one property selected from the group consisting of the density, the plastic viscosity, the yield point, the gel strength, and the pH, of the drilling fluid composition may be substantially similar to the at least one property of a comparable drilling fluid composition devoid of the encapsulated thermochemical compounds. Methods for reducing a filter cake from a wellbore surface in a subterranean formation are also provided. The methods may include introducing into the wellbore the drilling fluid compositions, allowing the drilling fluid composition to reach a temperature in the wellbore sufficient for the encapsulated thermochemical compounds to react, where the reaction of the encapsulated thermochemical compounds generates heat and nitrogen gas.

A composition of an invert emulsion oil-based drilling fluid formulation includes an invert emulsion of an oil phase and an aqueous phase. The oil phase includes an oleaginous fluid and a liquid viscosifier that is a polyhedral oligomeric silsesquioxane (POSS). A method includes introducing an invert emulsion oil-based drilling fluid formulation including an oil phase, an aqueous phase, and a liquid viscosifier including POSS downhole through the wellbore and maintaining wellbore conditions such that the invert emulsion oil-based drilling fluid formulation provides a stable rheological property including one or more of viscosity, yield point, plastic viscosity, gel strength, and electrical stability for a period up to about 96 hours.

The present invention proposes a method for calculating the pumping resistance of self-compacting concrete, which belongs to the field of pumping. The method comprises: S1: establishing an initial pumping parameter model based on the geometric parameters of the pumping pipeline, the initial physical properties of the self-compacting concrete, and the pumping process parameters; S2: real-time acquisition of pumping condition data and digital filtering to obtain the filtered concrete flow rate; S3: calculating the dynamic plastic viscosity of the self-compacting concrete under the current working conditions using a dynamic rheological evolution model based on the pumping time, pumping ambient temperature, and relative humidity; S4: calculating the pressure loss in different sections of the pumping pipeline based on the initial pumping parameter model, the dynamic plastic viscosity, and the filtered concrete flow rate, and obtaining the total pumping resistance based on the pressure loss in each section. The present invention improves the accuracy of calculating the total pumping resistance of the pumping pipeline by taking into account the dynamic rheological properties of concrete, the effects of ambient temperature and humidity, the geometric parameters of the pipeline, and the pumping process parameters.

Drilling fluid compositions may include a weighting agent, a nitrite-containing compound, and an ammonium-containing compound, where the nitrite-containing compound and the ammonium-containing compound may be encapsulated together in copolymer micro-particles forming encapsulated thermochemical compounds, and where at least one property selected from the group consisting of the density, the plastic viscosity, the yield point, the gel strength, and the pH, of the drilling fluid composition may be substantially similar to the at least one property of a comparable drilling fluid composition devoid of the encapsulated thermochemical compounds. Methods for reducing a filter cake from a wellbore surface in a subterranean formation are also provided. The methods may include introducing into the wellbore the drilling fluid compositions, allowing the drilling fluid composition to reach a temperature in the wellbore sufficient for the encapsulated thermochemical compounds to react, where the reaction of the encapsulated thermochemical compounds generates heat and nitrogen gas.

The invention discloses a multi-element solid-waste-based ecological mining area filling material and a preparation method thereof.The preparation method of the multi-element solid-waste-based ecological mining area filling material comprises the steps that a first system and a second system are mixed to be uniform, slurry is obtained, pouring and standing are conducted till final setting, maintenance is conducted, and the multi-element solid-waste-based ecological mining area filling material is obtained; the first system comprises a foaming agent and first water; the second system comprises a cementing material, second water and a water reducing agent. The multi-element solid waste-based ecological mining area filling material provided by the invention takes the fly ash as a main raw material and is low in cost, the slump expansion degree of the multi-element solid waste-based ecological mining area filling material is up to 272 mm, the uniaxial compressive strength is up to 5.928 MPa, and meanwhile, the multi-element solid waste-based ecological mining area filling material has relatively low plastic viscosity and yield stress.

Drilling fluid compositions may include a weighting agent, a nitrite-containing compound, and an ammonium-containing compound, where the nitrite-containing compound and the ammonium-containing compound may be encapsulated together in copolymer micro-particles forming encapsulated thermochemical compounds, and where at least one property selected from the group consisting of the density, the plastic viscosity, the yield point, the gel strength, and the pH, of the drilling fluid composition may be substantially similar to the at least one property of a comparable drilling fluid composition devoid of the encapsulated thermochemical compounds. Methods for reducing a filter cake from a wellbore surface in a subterranean formation are also provided. The methods may include introducing into the wellbore the drilling fluid compositions, allowing the drilling fluid composition to reach a temperature in the wellbore sufficient for the encapsulated thermochemical compounds to react, where the reaction of the encapsulated thermochemical compounds generates heat and nitrogen gas.

The invention discloses a superfine composite mineral admixture for tunnel engineering wet spraying concrete. The superfine composite mineral admixture comprises the following components in percentage by weight: 30-60 parts of dense silica fume; 40 to 70 parts of superfine slag powder; the weight of the dispersing agent is 0.03%-0.07% of the total weight of the dense silica fume and the superfine slag powder. According to the invention, industrial solid wastes such as silica fume, superfine slag powder and the like are used as raw materials, and the superfine composite mineral admixture for the wet-sprayed concrete with good dispersity is provided, so that cementing material particles tend to be closely stacked, contact points among powder particles are increased, the plastic viscosity and yield stress of fresh concrete are effectively increased, and the quality of the concrete is improved. The cohesiveness and the water-retaining property of fresh concrete are enhanced, and the rebound rate of wet-sprayed concrete is reduced.

The invention relates to the field of drilling fluids, in particular to a shear-improving non-plasticization shear-improving agent for an oil-based drilling fluid, a preparation method of the shear-improving non-plasticization shear-improving agent and the oil-based drilling fluid. The shear-improving non-plasticizing viscous shear-improving agent for the oil-based drilling fluid provided by the invention is prepared by reacting amine and derivatives thereof, polyacid, alcohol ether compounds and unsaturated higher fatty acid ester according to a certain proportion and then diluting and dissolving with a solvent. The shear strength improving agent provided by the invention has the characteristics of good shear strength improving effect and no plasticizing viscosity, improves the rock carrying capacity of the oil-based drilling fluid, does not improve the plastic viscosity of the oil-based drilling fluid, improves the flow pattern of the oil-based drilling fluid, and effectively realizes the low-viscosity high-shear oil-based drilling fluid.

The invention relates to a water activity regulator as well as a preparation method and application thereof. The preparation method of the water activity regulator comprises the following steps: (1) mixing 2-acrylamide-2-methylpropanesulfonic acid, sodium p-styrenesulfonate, N-vinylpyrrolidone and polyether amine, and adding an initiator for polymerization reaction to obtain a polyether amine-sulfonic acid group-benzene ring copolymer; and (2) mixing the polyether amine-sulfonic acid group-benzene ring copolymer with a hydroxyl compound to obtain the water activity regulator. By adding the water activity regulator disclosed by the invention, the retention rate of apparent viscosity and plastic viscosity of the prepared sample adding slurry after aging is high, and the API filter loss is low.

This invention discloses a computer vision-based method and system for detecting the workability of concrete. It employs a non-contact visual sensing approach to simultaneously acquire video sequences of freshly mixed concrete in a free-flowing state at both the macroscopic slump flow scale and the microscopic particle migration scale. An improved spatiotemporal feature pyramid network is used to extract multi-scale morphological features from the video sequences, obtaining a multi-scale visual feature set including the flow profile evolution rate, surface ripple spectrum, aggregate suspension trajectory, and paste coating state. A graph neural network model integrating prior knowledge of fluid mechanics is constructed to map discrete visual features to continuous rheological parameters, outputting workability indicators such as slump, spread, yield stress, and plastic viscosity in real time. This invention significantly improves the level of intelligent quality control in concrete production.

The invention discloses a preparation method of C2-grade ceramic tile adhesive mortar capable of improving hanging resistance and construction hand feeling, and relates to the field of building material chemistry and composite materials. The preparation method of the C2-grade ceramic tile adhesive mortar for improving the sagging resistance and the construction hand feeling comprises a dry mixing pre-dispersion stage, a staged wet mixing and homogenizing stage, a standing curing stage and a final activation stage. According to the preparation method of the C2-grade ceramic tile adhesive mortar capable of improving the sagging resistance and the construction hand feeling, through the core effect of a wood fiber composite system, the traditional problem that high sagging resistance must be accompanied by high construction resistance is solved, the sagging resistance is maintained and even enhanced, meanwhile, the yield stress and the plastic viscosity of freshly mixed mortar are remarkably reduced, and the quality of the ceramic tile adhesive mortar is improved. The construction blade coating is smooth and labor-saving, the slurry is easy to spread, the surface is flat and full, and the construction efficiency, quality and operation experience are greatly improved.

The invention discloses a corrosion test method for a seabed cement-based material. The corrosion test method comprises the following steps: step 1, preparing artificial seabed sludge; 2, testing the water content and the shear strength of the artificial seabed sludge; 3, drawing a shear stress-shear rate curve of the artificial seabed sludge, and determining the yield stress and the plastic viscosity of the artificial seabed sludge; step 4, completely burying cement-based materials with different proportions into artificial seabed sludge, covering a sealing device, putting the artificial seabed sludge into a constant temperature and humidity chamber or an environmental test chamber, setting temperature and humidity parameters, and starting a soaking test; and 5, taking out the cement-based material according to a preset time interval, observing and testing to obtain an erosion rule of the cement-based material in an artificially prepared seabed sludge environment, and determining a construction mix proportion. The concentration of key erosion factors is accurately controlled by adjusting components according to needs, and erosion characteristics of specific marine environments such as mud flat, deep sea and salt marsh can be simulated.

The application discloses a kind of high density low rebound shotcrete and preparation method thereof, it is related to shotcrete field, and preparation method includes: (1), respectively to cementitious material, fine aggregate, coarse aggregate is using MAA model to be packed and the design ratio of each raw material in interior is obtained;(2), cementitious material, fine aggregate, coarse aggregate and the rebounding agent of design ratio obtained according to step (1) are fully mixed, water, water reducing agent is mixed, then by the way of mixing with pressurized air, incorporate accelerator, obtain high density low rebound shotcrete.The application uses early strength rebounding agent, improves the pumpability of shotcrete, accelerates the early hydration of concrete, under the joint action of alkali-free accelerator, rapidly improves the early mechanical properties of shotcrete, improves shotcrete construction efficiency.Multiple close packing is used, and cementitious material, fine aggregate, coarse aggregate respectively form close packing structure, effectively improve the plastic viscosity of paste and the compactness of concrete.

The present application relates to the field of environmental protection and ecological restoration, in particular to a method and system for determining the cylindrical penetration radius of a Bingham cement slurry diffusion path, comprising the following steps: obtaining the density, mass water content, specific gravity, permeability coefficient and average particle size of the rock-soil body through a rock-soil body mechanics experiment, and obtaining the porosity of the rock-soil body; obtaining the length ratio of the pore channels in the rock-soil body based on the porosity of the rock-soil body and the above-mentioned parameter information; obtaining the water viscosity, Bingham fluid plastic viscosity and Bingham fluid yield stress based on a rheological test scheme, and obtaining the water-cement ratio of the Bingham cement slurry, the grouting time, the grouting pressure, the grouting pipe radius and the groundwater pressure at the grouting point according to the grouting requirements; and obtaining the cylindrical penetration radius result under the Bingham cement slurry diffusion path based on the comprehensive action information of the particle size distribution, the diffusion path influence and the parameter information. The present application can calculate and predict the cylindrical penetration radius, reduce the risk of grouting engineering and ensure the safety and stability of the engineering.

The invention provides high-frequency foundation pier self-compacting concrete as well as a preparation method and application thereof. The concrete comprises a cementing material system, an aggregate system, a functional additive, a fiber reinforced system and a self-repairing component. Wherein the steel fibers are mixed with the sisal fibers subjected to plasma grafting treatment, so that the crack resistance is improved; the diatomite microcapsule loaded with bacillus is used as a self-repairing component to realize the self-healing of the crack. During preparation, the self-compactness and compactness of a concrete mixture are ensured through a step-by-step stirring and high-frequency vibration process. Through fiber modification treatment, a microcapsule self-repairing technology and process optimization, the concrete has low yield stress and high plastic viscosity, the crack resistance and durability in a high-frequency vibration environment are remarkably improved, the crack healing rate can reach 50%, and the concrete is suitable for high-frequency foundation pier construction of bridges, wind power, nuclear power and the like and has good engineering application value.

A method may include: receiving wellbore data comprising wellbore geometry, density and rheology of a drilling fluid, and density and rheology of a cement slurry, and receiving a design objective function; generating a plurality of spacer fluid train designs where each of the plurality of spacer fluid train designs comprise two or more spacer fluids where each spacer fluid has a specified density, yield point, plastic viscosity, and volume; calculating a solution to an objective function and annular displacement for each of the plurality of spacer fluid train designs in a reverse cementing operation using a displacement simulator having inputs comprising the wellbore data and the plurality of spacer fluid train designs; comparing each solution to the objective function to the design objective function; selecting a spacer fluid train design from the plurality of spacer fluid train designs which meets the design objective function; and preparing a spacer fluid train based on the selected spacer fluid train design.

The present application relates to the technical field of high-performance cement-based material preparation and process control, and particularly relates to a self-compacting ultra-high performance concrete performance optimization method based on rheological parameter regulation. The steps are as follows: steel fibers are added to self-compacting ultra-high performance concrete slurry with rheological parameters in a set range to prepare test pieces, X-ray CT technology is used to perform three-dimensional reconstruction on the test pieces after curing, steel fiber distribution parameters are extracted, and crack propagation morphology and strain field distribution data are collected; an interface homogeneity index related to the steel fiber distribution parameters, crack propagation morphology and strain field distribution data is constructed, and X-ray CT technology is used to perform interface densification analysis; a function mapping relationship between the rheological parameters and the interface microstructure is constructed to determine the value range of the optimal yield stress and plastic viscosity. The above method is used to realize performance optimization in the self-compacting ultra-high performance concrete preparation stage.

The application discloses a high-strength-concrete viscosity-reducing fast-dispersing polycarboxylic acid water reducing agent and a preparation method thereof, and relates to the technical field of polycarboxylic acid water reducing agents; the high-strength-concrete viscosity-reducing fast-dispersing polycarboxylic acid water reducing agent comprises the following components in parts by weight: 400 parts of unsaturated polyether macromonomer, 20-40 parts of unsaturated acid monomer and 10-20 parts of unsaturated functional monomer; and the application further provides a preparation method of the polycarboxylic acid water reducing agent. The water reducing agent can reduce the viscosity of high-strength concrete, improve the dispersing performance of the concrete, reduce the mixing time, and thus solve the problems of high plastic viscosity of the concrete and the like without reducing the strength and other performances of the concrete.

The present application relates to a kind of low-pressure easy leakage formation drilling parameter optimization method, first, formation leakage pressure and collapse pressure are predicted;Then design drilling fluid performance parameters, wherein the density of drilling fluid is designed based on the equivalent density of smaller one in it;Circulation discharge and drilling fluid dynamic shear force, plastic viscosity are designed with the circulating resistance during drilling not more than the difference between leakage pressure and collapse pressure;Then calculate the critical annulus return speed when no cuttings bed is formed, if the current designed circulation return speed is less than the critical annulus return speed, then re-optimize circulation discharge and drilling fluid dynamic shear force, plastic viscosity, until the optimized circulation discharge meets the circulation return speed less than the critical annulus return speed;Complete the design of drilling fluid performance parameters for the whole well section;Finally, according to the drilling fluid performance parameters, optimize the drilling or casing speed, control the excitation pressure in the range of the difference between leakage pressure and collapse pressure, complete the drilling parameter optimization. Improve the drilling efficiency, reduce the cost.

The application discloses a machine-made sand concrete and a preparation method and application thereof, and comprises the following components in parts by weight: cement 350-370 parts, fly ash 50-100 parts, mineral powder 100-150 parts, microbead 40-60 parts, sand 700-820 parts, broken stone 1000-1200 parts, additive 12-16 parts and water 140-150 parts. The application prepares a C80 concrete with low yield stress through the adjustment of raw materials, and uses yield stress, plastic viscosity and other indexes as the basis of pumping performance, and uses extension degree and reverse slump time as auxiliary indexes, so as to reduce pumping pressure and improve pumping efficiency.

This invention relates to the field of tunnel engineering materials technology, and in particular to a method for regulating the rheological properties of shield tunneling fine sand mortar using functional polycarboxylate superplasticizers. The method includes: providing cement, shield tunneling fine sand, natural sand, water, and functional polycarboxylate superplasticizers; the functional polycarboxylate superplasticizers include anti-mud adsorption type polycarboxylate superplasticizers and ultra-dispersed viscosity-reducing type polycarboxylate superplasticizers; setting the target flowability and target plastic viscosity of the cement mortar; based on a preset water-reducing equivalent complementary relationship model and a plastic viscosity regulation relationship model, using the set target flowability to match the water-reducing equivalent complementary relationship as a constraint condition, simultaneously solving to determine the dosage of PCE-SP and PCE-VR; by establishing a quantitative correlation between the fine aggregate coupling parameter D / PFT and the mortar yield stress and residual viscosity, the rheological properties of the mortar can be accurately predicted and targeted, significantly simplifying the mortar mix design process and reducing R&D and engineering application costs.

The invention relates to the technical field of workover fluids, in particular to a high-temperature-resistant workover fluid and a preparation method thereof. The high-temperature-resistant workover fluid comprises the following raw materials: deionized water, a modified anti-sedimentation enhancer, a temperature-resistant polymer thickener, a heat stabilizer, a viscosity stabilizer, a bactericide, a density regulator and a blocking agent. The preparation method of the high-temperature-resistant workover fluid comprises the following steps: sequentially adding the density regulator and the blocking agent into the deionized water, uniformly stirring, adding the modified anti-settling enhancer and the temperature-resistant polymer thickener, uniformly stirring, adding the heat stabilizer and the viscosity stabilizer, stirring at a constant temperature, cooling to room temperature, adding the bactericide, uniformly stirring, standing and curing, and thus obtaining the high-temperature-resistant workover fluid. The high-temperature-resistant workover fluid is obtained. The high-temperature-resistant workover fluid is outstanding in high-temperature stability, after the workover fluid is subjected to thermal standing at 210 DEG C for 7 days, the density is stable, parameters of plastic viscosity, dynamic shearing force and initial cutting / final cutting are reasonable, obvious sedimentation is avoided, and the stability of the workover fluid at high temperature is effectively improved.

The application relates to a cement slurry fluidity and rheological parameter measuring method and device under real temperature influence, and relates to the technical field of geotechnical engineering grouting material performance detection, which comprises the following steps: placing a container containing the cement slurry to be measured in the center of a horizontal constant temperature surface of a testing device, preheating and constant-temperatureing the horizontal constant temperature surface and the cement slurry to be measured to a preset test temperature, allowing the cement slurry to be measured to freely diffuse on the horizontal constant temperature surface of the testing device, automatically and accurately measuring the diffusion distances of the cement slurry in two mutually perpendicular directions, determining the average fluidity of the cement slurry at the preset test temperature according to the diffusion distances, and automatically calculating the plastic viscosity and yield stress of the cement slurry under the test temperature condition by using a rheological parameter prediction mathematical model built according to a solid-liquid two-phase flow theory and built in the device, so that the rheological parameters of the cement slurry under the real ambient temperature and real stratum temperature conditions of the engineering site can be quickly and reliably obtained.

The application discloses a superfine powder-micromolecule alcohol dual-phase synergistic UHPC viscosity reducer and a preparation method thereof, and belongs to the technical field of admixtures for building materials. The superfine powder is used to prepare the viscosity reducing admixture, dense packing is realized through multi-scale particle filling, the friction between particles is reduced, a graded continuous particle system is formed, the demand for free water is reduced, and the slurry fluidity is significantly improved. Meanwhile, through the dispersion of the polycarboxylic acid high-performance water reducing agent, the lubrication and hydration regulation of the micromolecule alcohol, the synergistic optimization of the air entraining agent and the defoaming agent on the bubble system, and the retardation of the setting retarder on the hydration process, a multi-scale synergistic viscosity reduction mechanism is formed, the slurry yield stress and plastic viscosity are significantly reduced, high strength and durability are maintained, and the application is suitable for the efficient viscosity reduction and working performance optimization of the low water-binder ratio UHPC system.

The application provides an anti-carbon dioxide pollution water-based drilling fluid viscosity reducer and a preparation method and application thereof, and belongs to the technical field of drilling fluid treating agents. The anti-carbon dioxide pollution water-based drilling fluid viscosity reducer is prepared from the following raw materials in parts by mass: 0.5-1 parts of acrylic acid, 7-10 parts of 2-acrylamido-2-methylpropane sulfonic acid, 5-8 parts of acryloyloxyethyl trimethyl ammonium chloride, 50-80 parts of ethylene glycol monovinyl polyethylene glycol ether, 0.04-0.08 parts of an oxidizing agent, 0.05-0.07 parts of a reducing agent, 0.03-0.06 parts of a chain transfer agent and 130-180 parts of water. The viscosity reducer prepared by the application has excellent viscosity reduction performance in the drilling fluid, especially has a remarkable resistance to CO2 pollution, effectively reduces the apparent viscosity, plastic viscosity and dynamic shear force of the drilling fluid system, significantly improves the drilling efficiency, and is suitable for high-temperature and high-pressure complex formation environments.

A method may include: receiving wellbore data comprising wellbore geometry, density and rheology of a drilling fluid, and density and rheology of a cement slurry, and receiving a design objective function; generating a plurality of spacer fluid train designs where each of the plurality of spacer fluid train designs comprise two or more spacer fluids where each spacer fluid has a specified density, yield point, plastic viscosity, and volume; calculating a solution to an objective function and annular displacement for each of the plurality of spacer fluid train designs in a reverse cementing operation using a displacement simulator having inputs comprising the wellbore data and the plurality of spacer fluid train designs; comparing each solution to the objective function to the design objective function; selecting a spacer fluid train design from the plurality of spacer fluid train designs which meets the design objective function; and preparing a spacer fluid train based on the selected spacer fluid train design.

The invention relates to the technical field of environmental protection and ecological restoration, in particular to a method and system for determining the cylindrical permeation radius of a Bingham cement grout diffusion path, and the method comprises the following steps: obtaining the density, the mass water content, the specific gravity, the permeability coefficient and the average particle size of a rock-soil body through a rock-soil body mechanical experiment, and obtaining a rock-soil body porosity result; obtaining the length ratio of pore channels in the rock-soil body according to the porosity result of the rock-soil body and the parameter information; obtaining water viscosity, Bingham fluid plastic viscosity and Bingham fluid yield stress based on a rheological test scheme, and obtaining a Bingham cement slurry water cement ratio, grouting time, grouting pressure, a grouting pipe radius and underground water pressure at a grouting point according to grouting requirements; and obtaining a cylindrical permeation radius result under the Bingham cement slurry diffusion path by combining the grain composition comprehensive action information, the diffusion path influence condition and the parameter information. The method calculates and predicts the cylindrical permeation radius, can reduce the risk of the grouting project, and ensures the safety and stability of the project.

The invention discloses a construction method of a paste rheological property prediction model of an integrated algorithm, and belongs to the technical field of metal mine paste filling. The method comprises the following steps: preparing paste filling slurries with different mass concentrations and cement-sand ratios by utilizing tailings materials from a plurality of mining areas, determining the yield stress and the plastic viscosity of the paste filling slurries through a rheological test, and constructing a prediction model data set; performing feature optimization by using F-test and Pearson's correlation coefficient test, and determining a core feature having significant correlation with a target parameter as an input feature variable; an extreme gradient boosting tree model, an error reverse propagation neural network model and a K-nearest neighbor model are selected as base learners, a linear regression model is taken as a meta learner, an integrated prediction model is constructed, and model training and hyper-parameter optimization are performed by adopting five-fold cross validation and a Bayesian optimization algorithm. Performance comparison results show that the prediction precision of the integrated model is obviously superior to that of each base learner, and rapid and accurate prediction of the rheological characteristics of the paste is realized.