150 results about "Uniaxial compression" patented technology

The invention provides a macroscopic finite element simulation analysis method and device for a sealing element considering plastic deformation, and belongs to the field of sealing element design. The method comprises the following steps: acquiring an engineering stress-strain curve of a plastic material in a compression state; converting the engineering stress-strain curve into a real stress-strain curve; determining a yield limit, and taking a strain point corresponding to the yield limit as a demarcation point of elasticity and plastic deformation; an elastic section of a real stress-strain curve is extracted, the elastic modulus is calculated, and the Poisson's ratio is obtained through axial and transverse strain measurement in a uniaxial compression test; a true stress-strain curve plastic section is extracted, and a multi-linear isotropic hardening model is established; constructing a complete elastic-plastic constitutive model covering the elastic deformation area and the plastic deformation area; the stress distribution, the strain response and the contact performance of the plastic sealing element in a compression deformation state are simulated. According to the method and the device provided by the invention, the problem that the result does not conform to the reality due to the fact that only elastic modulus and Poisson's ratio are used in existing sealing element simulation can be solved.

The invention provides a coal impact tendency evaluation method which comprises the following steps: sampling a coal rock material on an engineering site, and processing the sample into a coal rock test piece with a preset size and a preset shape; carrying out a uniaxial compression experiment on the coal rock test piece, and recording a motion image of an ejection body on the coal rock test piece in the loading process of the coal rock test piece; comparing cosine similarities among the plurality of images in the moving images, and determining the image with the maximum damage degree according to the cosine similarities; analyzing gray level distribution of the image with the maximum damage degree to obtain a gray level histogram; identifying particle information of the broken particles in the image with the maximum damage degree; representing the damage degree of the coal rock material by using the particle information of the crushed particles; and evaluating the coal impact tendency by using the damage degree of the coal rock material. According to the evaluation method for the coal impact tendency disclosed by the invention, a new coal impact tendency evaluation index is provided, the research on the damage process of the coal rock material is perfected, and basic parameters are provided for subsequent early warning of damage of the coal rock material.

The invention discloses a coal gangue concrete stress response prediction method based on a physical information neural network. The method comprises the following steps: constructing a stress-strain curve database of coal gangue concrete; acquiring damage variables of the coal gangue concrete in a compaction stage, a yield stage and a fracture stage under uniaxial compression; deducing a mesoscopic statistical damage constitutive model of the coal gangue concrete according to the damage variables: constructing a physical information neural network, and embedding the mesoscopic statistical damage constitutive model and boundary conditions into a loss function of the neural network; performing normalization processing on the coal gangue concrete stress-strain curve database to obtain a data set; training a physical information neural network model according to the training set, and performing hyper-parameter optimization according to the verification set to obtain a trained model; and predicting the stress of the coal gangue concrete by using the trained model according to the test set. According to the method, the damage constitutive equation and the deep learning algorithm are fused, so that high-precision and low-data-demand mechanical property prediction is realized.

The invention discloses a cement stabilized macadam mechanical property analysis method based on maximum aggregate nominal particle size, and relates to the technical field of cement stabilized macadam mechanical property analysis, the method comprises the following steps: preparing skeleton dense type cement stabilized macadam test pieces with different nominal maximum particle sizes; carrying out a macroscopic mechanical test to obtain a stress-strain curve and a crushing value; establishing a three-dimensional discrete element numerical model corresponding to the test piece, performing uniaxial compression simulation, and ensuring the reliability through model verification; and based on the verified model, quantitatively analyzing the contact force distribution, the contact quantity characteristic and the microcrack evolution law from the microscopic level. According to the analysis method disclosed by the invention, a mechanism that the nominal maximum particle size improves the macroscopic performance of the material by regulating and controlling an internal force chain network and inhibiting damage accumulation is disclosed through a macro-micro combination means, and a scientific micro-mechanical basis and a quantitative analysis tool are provided for grading optimization and high-performance design of the cement stabilized macadam base.

The invention discloses a deep well rock mass instability failure time accurate forecasting and early warning system, and relates to the technical field of deep well rock mass failure early warning, and the deep well rock mass instability failure time accurate forecasting and early warning system comprises the following steps: collecting a plurality of deep well rock samples to carry out a uniaxial compression experiment, and collecting acoustic emission signals in real time based on an acoustic emission sensor to obtain original acoustic emission signal data; carrying out self-adaptive preprocessing, and carrying out data classification and integration to obtain rock sample acoustic emission parameter data; constructing an original damage forecasting model, and performing model training and verification optimization based on the rock sample acoustic emission parameter data to obtain a rock damage forecasting model; collecting an acoustic emission signal of the deep well rock mass, and predicting the instability failure time of the deep well rock mass in real time based on the rock failure forecasting model; the method is used for solving the problems that when an existing deep well rock mass damage early warning technology carries out early warning on rock mass instability damage through acoustic emission monitoring, single or few characteristic parameters are manually processed and analyzed, and the early warning reliability and timeliness are not high.

The invention discloses a method for estimating the boundary shear stress of a salt rock single crystal sliding face, belongs to the technical field of geotechnical engineering mechanics and material mechanics, and establishes a frame capable of directly estimating the boundary shear stress of the salt rock single crystal sliding face based on the Hall-Pearch theory. The mapping from the measurable macromechanical parameters to the boundary shear stress of the microcosmic single crystal slippage surface is realized. The method only needs conventional cold pressing preparation, EBSD grain size data and uniaxial compression test results, and does not need to depend on high-cost FIB microcolumn compression or in-situ nanoindentation tests. The method can provide more accurate material mechanical parameters for salt cavern design, creep stability analysis and underground engineering safety evaluation, and has good engineering applicability and wide engineering application prospects.

The invention discloses a roadway roof damage time prediction method and system, and belongs to the technical field of mine rock mechanics and safety engineering. Comprising the following steps: recognizing a roof rock stratum structure and lithology of each layer through drilling peeping, and drilling a representative rock sample; determining the crack initiation strength and peak strength of the rock sample through a uniaxial compression test; selecting a plurality of stress levels between the axial strain and the acoustic emission signal to carry out a creep test, synchronously monitoring the axial strain and the acoustic emission signal, and determining an accelerated creep starting moment as the damage time under the stress according to the abrupt change characteristics of the axial strain and the acoustic emission signal; establishing a stress-failure time relation model of each lithology; finally, selecting a corresponding model to predict the damage time of rocks at different layers of the roof according to the actual rock stratum structure and ground stress state of the roadway; according to the method, accurate and reliable time prediction of the progressive damage process of the roadway roof is realized.

The invention discloses an aggregate random distribution concrete PFC (Power Factor Correction) simulation method, which comprises the following steps: a model selection step: determining a parallel bonding model as a mechanical model for concrete material simulation; a cement mortar matrix generation step of generating a cement mortar matrix by using particles in a set size range in a set space range based on the model, and setting pore density, particle density and contact model parameters; a coarse aggregate random distribution simulation step: randomly covering and grouping original particles in the matrix in a grouping and range mode; a concrete numerical model construction step: determining particle classification so as to distinguish cement mortar and coarse aggregate; and a model reliability verification step: comparing indoor test results through a uniaxial compression test. According to the method, the simulation accuracy is improved, the randomness of aggregate is reduced, the model reliability is ensured, the matrix simulation refinement degree is improved, and a method is provided for concrete modeling and performance research.

The invention discloses an abandoned mine oil storage chamber surrounding rock property evaluation method, and relates to the technical field of mineral engineering. The method comprises the following steps: acquiring damaged rock samples with different oil-water soaking times, and analyzing silicon element content change, surface particle characteristics, crack development and hole depth change of the damaged rock samples so as to determine internal structure erosion degree and surface topography characteristics; drawing a uniaxial compression stress-strain curve, a time-varying curve of acoustic emission ringing count rate and accumulated ringing count, a damaged rock sample RA-AF graph and a typical moment vertical displacement field graph, and obtaining acoustic emission characteristics and a surface displacement field of the damaged rock sample; calculating different energy values and drawing an energy evolution trend curve; and comprehensively evaluating the rock properties of the damaged rock sample under different oil-water soaking times according to the internal structure erosion degree, the surface topography characteristics, the acoustic emission characteristics and the energy evolution law. According to the invention, the multi-angle macro-micro characteristics of the surrounding rock of the abandoned mine oil storage chamber can be analyzed, and the comprehensive evaluation of the surrounding rock property is realized.

An intelligent monitoring and early warning method for damage failure of a filling body beside a gob-side entry retaining roadway comprises the steps that a high-water-content material standard sample is prepared, uniaxial compression testing and acoustic emission monitoring are carried out, and mechanical property data and acoustic emission waveform signals are synchronously obtained; carrying out failure stage division based on the maximum stress value and a sliding linear fitting method, and carrying out automatic classification and labeling operation; solving variational mode decomposition key parameters through an intelligent optimization algorithm to obtain decomposed intrinsic mode components; constructing a sample data set through a data enhancement process; training to obtain a waveform-based destruction stage classification model; elastic wave signals are collected in real time, variational mode decomposition and noise reduction processing are carried out, intrinsic mode components highly related to the damage degree are obtained and serve as input data, and a classification result is output through a waveform-based damage stage classification model; and performing graded early warning. According to the method, the real-time dynamic monitoring of the damage failure of the roadside filling body can be realized, and the early warning of the damage failure of the high-water material roadside filling body can be realized.

The invention discloses a multipoint non-uniform measurement device for uniaxial compression radial displacement of salt rock at high temperature and an implementation method. The measurement device comprises an axial load loading system, a test cavity temperature control system, a radial displacement measurement system and a computer data processing system, the test cavity temperature control system is used for regulating and controlling the environment temperature of the salt rock sample placed in the test cavity temperature control system, so that the salt rock sample is located in a high-temperature environment with a preset temperature; the axial load loading system is in contact with the salt rock sample in the test cavity temperature control system and is used for applying a vertically downward axial load to the salt rock sample at a high temperature; and the radial displacement measurement system is connected with the salt rock sample and is used for measuring the real-time temperature and radial displacement of the surface of the salt rock sample placed in the test cavity temperature control system. And the computer data processing system is connected with the radial displacement measuring system. According to the invention, the radial displacement and temperature of the salt rock sample in the uniaxial compression process can be measured with high precision under the high-temperature condition.

The invention discloses a coal body compression mechanical test acoustic emission signal processing method and system, and relates to coal rock mass analysis. The method comprises the steps that under the supercritical water coupling effect condition, an acoustic emission original data set of the whole coal body uniaxial compression damage process is collected; respectively carrying out time domain processing, frequency domain conversion and spatial positioning calculation on the original data set, and outputting a time domain characteristic parameter, a frequency domain characteristic parameter set and a spatial position parameter set; and performing data fusion on the time domain characteristic parameter set, the frequency domain characteristic parameter set and the spatial position parameter set, establishing a multi-dimensional characteristic data matrix through time synchronization, and analyzing acoustic emission signal laws of different damage stages of the coal body under the supercritical water coupling effect. Aiming at the low recognition precision of the coal body damage stage under the supercritical water coupling effect, the recognition precision is improved by performing time domain processing, frequency domain conversion, spatial positioning calculation and the like on an acoustic emission original data set.

The invention discloses a grouting reinforcement method for a soft and hard interbed rock mass slope under the dry-wet cycle condition. The grouting reinforcement method comprises the following steps that a soft and hard interbed rock mass numerical model is constructed, and parameter calibration is conducted on the model; uniaxial compression test numerical simulation is carried out on the soft and hard interbedded rock mass models under different working conditions; the stability of the soft and hard interbedded rock mass is evaluated, and rock mass damage risks and weak links in different areas are determined; and grouting reinforcement is carried out according to the obtained result. According to the method, multiple groups of variables are set, the influence of each factor on the overall strength of the rock mass is comprehensively researched, and the rock mass stability is comprehensively and accurately evaluated; the drilling direction and distance are adjusted according to the rock stratum dip angle, it is ensured that grout effectively permeates into key parts, and the reinforcing effect is improved; accurate regulation and control of grouting parameters are achieved, and it is ensured that grout fully fills cracks and does not disturb a rock mass structure; and grouting parameters are adjusted according to the deviation and the change rate, and the grouting reinforcement effect is ensured.

The invention provides a blasting simulation method and device for crystal intruding rock, and the method comprises the steps: building an initial rock crystal sample uniaxial compression model according to the mesoscopic physical parameters of target crystal intruding rock; generating a cohesive force unit for a contact interface between crystal grains in the uniaxial compression model to obtain a uniaxial compression model of the target rock crystal sample; performing a uniaxial compression simulation test on the uniaxial compression model of the target rock crystal sample to obtain test simulation data, correcting parameters through a back analysis method to obtain target material parameters of a target crystal, and constructing a rock crystal medium blasting construction FDEM model; and according to the rock crystal medium blasting construction FDEM model and the blasting parameters, blasting simulation is carried out on the target crystal intruding rock. Therefore, according to the scheme, by designing the finite-discrete coupling blasting simulation method, the cost can be reduced, the time consumption can be reduced, and the dynamic response rule and the damage mechanism of the rock mass in the blasting process can be quantitatively represented.

The invention discloses a method for calibrating finite-discrete element input parameters of a water-containing rock, which comprises the following steps of: respectively carrying out a uniaxial tensile test, a uniaxial compression test and a triaxial compression test on a dry rock sample and rock samples with different water contents; obtaining an evolution equation of the tensile strength along with the moisture content, an evolution equation of the elastic modulus and the uniaxial compressive strength along with the moisture content, and an evolution equation of the cohesive force and the internal friction angle along with the moisture content; carrying out a lateral constraint water absorption swelling test on the dry rock to obtain a vertical expansion evolution curve; on the basis of the obtained results, the fracture energy, the humidity expansion coefficient and the humidity diffusion coefficient in the finite-discrete element method are calibrated; on the basis of the calibration parameters, finite-discrete element uniaxial and triaxial compression numerical simulation of the rock samples with different water contents is carried out, and simulation results are obtained; and when the error between the test result and the simulation result is within a preset threshold value, obtaining a final parameter calibration result. The invention provides a simple, accurate and efficient parameter calibration means for water-rock interaction mechanism research.

The invention discloses a construction method of a water-containing rock damage statistical constitutive model considering compaction deformation, which comprises the following steps: carrying out a uniaxial compression test on a rock sample to obtain an axial stress-axial strain curve and a demarcation point in a compaction stage and a linear elasticity stage in the axial stress-axial strain curve; a sigmoid function is introduced, and the constitutive relation of the water-containing rock in the microfracture compaction stage is constructed; acquiring a damage variable after coupling of rainfall damage and stress damage caused by rock moisture infiltration; based on a damage statistical theory, constructing a constitutive relationship between a linear elasticity stage and a damage softening stage after a microfracture compaction stage of the water-containing rock; and constructing a damage statistical constitutive model of the water-containing rock considering compaction deformation. The constitutive curve corresponding to the constitutive model well reflects the compaction characteristic, the elastic characteristic, the damage softening characteristic and other deformation characteristics of the rock mass, and high prediction precision and practical application value are shown.

The invention discloses a non-contact uniaxial compression test infrared strain meter and a use method thereof, and belongs to the field of rock mechanics and engineering testing. The objective of the invention is to solve the prominent problems of low measurement precision, easy influence by characteristics of a test object, difficulty in comprehensively and accurately reflecting full-field strain distribution and the like of a traditional contact type strain measurement device in a uniaxial compression test. A non-contact infrared imaging measurement technology is adopted, a high-speed infrared camera is matched with a DIC algorithm, real-time mapping of full-field strain distribution is accurately achieved, transient behaviors such as crack initiation and expansion are clearly captured, strain field data and temperature field data can be synchronously obtained, measurement of the strain field data and the temperature field data are organically combined, and by means of the infrared technology and an environment control device, the measurement accuracy is improved. The device can stably work in severe environments such as high temperature and corrosivity, and is suitable for various complex samples; according to the method, the accuracy and comprehensiveness of measurement are effectively improved, the test efficiency is greatly improved, the method can be widely expanded to multiple fields of civil engineering, aerospace and the like, and powerful support is provided for research on mechanical properties of materials.

The present application belongs to the field of mechanics, and particularly relates to a method for eliminating error of a quasi-static compression mechanics experiment system. By using a constant pressure or a constant loading speed of a pressure head on a testing machine to perform quasi-static uniaxial compression on a test piece at room temperature, and taking two test pieces of different heights, the relationship between the system stiffness, the force and deformation of the system pressure head can be obtained, so as to obtain two corresponding force-time curves and displacement-time curves. By combining the two equations and eliminating the unknown Young's modulus E, the stiffness coefficient of the test system can be obtained, and the displacement-time curve of the pressure head can be obtained. Subsequently, the Young's modulus E can be inversely solved. The present application corrects the error of the mechanics experiment by defining the system stiffness coefficient, so as to realize a higher precision of the Young's modulus E and improve the accuracy of the quasi-static mechanics experiment.

The application provides a particle crushing strength prediction method and system considering pore parameters, relates to the technical field of geotechnical particle material mechanics, and aims at the problem that the prior art depends on a single parameter, lacks analysis and correlation analysis of the role of the single parameter, the model is single, and prediction accuracy and generalization ability are low.The method uses 3D printing to obtain particles with different particle sizes and pores, obtains the internal microstructure of the particles through micro-CT scanning, extracts pore characteristic parameters, considers multi-dimensional pore parameter characteristics, performs a uniaxial compression crushing experiment, quantifies the relationship between the multi-dimensional pore characteristic parameters and the particle crushing strength, calculates the actual particle crushing strength, establishes a PSO-SVR particle crushing strength prediction model, corrects the crushing strength predicted by the model according to the actual particle crushing strength and based on a calibration factor introduced based on a Weibull model.The application solves the problems in the prior art and improves the prediction accuracy and generalization ability of the model.

An evaluation method for corrosion damage evolution of underwater concrete structures includes performing the time reversal test on the concrete beam specimen placed in the water, performing the uniaxial compression test on the concrete cube specimens; immersing the concrete beam specimen and the concrete cube specimens in a hydrochloric acid solution, and performing the time reversal test on the concrete beam specimen on the 10th, 20th and 30th days respectively. At the same time, a concrete cube specimen is taken out to perform the uniaxial compression test on the 10th, 20th and 30th days respectively; and using the above calculation results to evaluate the corrosion evolution process thereof without damaging the underwater concrete structure.

The invention provides a portable multifunctional rock mechanics testing machine and method, and relates to the technical field of rock mechanics tests. According to the portable multifunctional rock mechanics testing machine, an expansion test assembly, a uniaxial compression test assembly, a point load test assembly, an indentation test assembly or a compression-shear test assembly are selectively arranged between a telescopic rod of a loading oil cylinder and / or a force transducer. The testing machine disclosed by the invention is simple and light in structure, and can be conveniently carried to an engineering site to carry out a rock mechanical test, so that on-site loading and data acquisition of a rock sample are realized; the tester can accurately control stress and strain conditions and can realize stable and uniform loading and unloading on site so as to obtain a reliable test result; the testing machine integrates multifunctional testing, and different testing assemblies are matched with an expansion test, a uniaxial compression test, a point load test, an indentation test or a compression-shear test, so that multi-parameter testing is realized aiming at different rock sample conditions.

The application discloses a coal body compression mechanics test acoustic emission signal processing method and system, relates to coal and rock mass analysis, and comprises the following steps: collecting acoustic emission original data sets of the whole process of coal body uniaxial compression destruction under the condition of supercritical water coupling; respectively performing time domain processing, frequency domain conversion and space positioning calculation on the original data sets, outputting time domain characteristic parameters, a frequency domain characteristic parameter set and a space position parameter set; fusing the time domain characteristic parameter set, the frequency domain characteristic parameter set and the space position parameter set, establishing a multi-dimensional characteristic data matrix through time synchronization, and analyzing acoustic emission signal rules of different destruction stages of the coal body under the condition of supercritical water coupling. The application improves the recognition accuracy by performing time domain processing, frequency domain conversion and space positioning calculation on the acoustic emission original data set, and solves the problem of low recognition accuracy of the coal body destruction stage under the condition of supercritical water coupling.

The application discloses a kind of fissure coal body grouting reinforcement experimental method and grouting reinforcement experimental mould, experimental method includes the following steps: S1: from the coal block obtained from the scene and drill cylindrical coal sample;S2: along the bedding direction of coal sample and split, make coal sample along self bedding surface form fissure;S3: coal sample is placed in grouting reinforcement experimental mould inside;S4: grouting reinforcement experimental mould is fastened;S5: using syringe and grout are injected into fissure by syringe;S6: stop grout injection of syringe;S7: after grouting ends 24h, coal sample is taken out from mould, after maintenance, sequentially carry out uniaxial compression test, tensile fracture test and brazilian split test;S8: summarize the mechanism of grout reinforced fissure coal body;The application is collected from the coal mine of scene and has obvious bedding coal sample, to ensure test accuracy;And using grouting reinforcement experimental mould, coal sample is constrained to improve the reliability of test;Therefore, the application is convenient for the coal sample after grout is fully filled, penetrates and consolidates to carry out experiment, improves experimental effect.

This paper provides a method, apparatus, device, and storage medium for automatically acquiring rock mechanical parameters. The method includes: reading stress-strain data obtained from uniaxial compression experiments on rocks; interpolating the stress-strain data to form a stress-strain curve; dynamically extending the stress-strain curve towards both ends, starting from a target point, until the goodness of fit of the regression line formed by the current extension is lower than a set threshold; segmenting the stress-strain curve using the stress peak point, strain peak point, and endpoint of the regression line as segmentation points; calling a first rock mechanical parameter calculation module to process the stress-strain curve and obtain a first type of rock mechanical parameters; and calling a second rock mechanical parameter calculation module to process the segmented stress-strain curve and obtain a second type of rock mechanical parameters; and merging the two types and outputting the results. The embodiments described in this paper can improve the efficiency and accuracy of acquiring rock mechanical parameters.

The application discloses a kind of early warning methods of easy argillization rock instability mutation, including making rock sample, respectively on rock sample under the condition of uniaxial compression acoustic emission test, and obtain the displacement, load and acoustic emission parameter numerical value of each rock sample;Calculate and analyze the mutation characteristics of the evolution of elastic strain energy curve of easy argillization rock;Construct the early warning model of elastic strain energy strain sequence of easy argillization rock instability mutation, when the simultaneous difference set equation Δ>0 indicates that easy argillization rock is in stable state, Δ<0 when easy argillization rock is in unstable state, Δ=0 when easy argillization rock is in critical state.The method of the application can comprehensively, quickly and accurately predict the instability mutation failure of easy argillization rock, and provide scientific reference basis for early warning prevention and treatment of rock instability mutation of mine exploitation.

The application discloses a cement stabilized macadam mechanical property analysis method based on maximum aggregate nominal particle size, relates to the technical field of cement stabilized macadam mechanical property analysis, and comprises the following steps: preparing skeleton dense type cement stabilized macadam test pieces with different nominal maximum particle sizes; performing macroscopic mechanical test to obtain stress-strain curves and crushing values; establishing a three-dimensional discrete element numerical model corresponding to the test pieces and performing uniaxial compression simulation, and verifying the model to ensure the reliability of the model; and based on the verified model, quantitatively analyzing contact force distribution, contact quantity characteristics and microcrack evolution law from a microcosmic aspect. According to the analysis method, the macroscopic performance of the material is improved by regulating the internal force chain network and inhibiting damage accumulation through the nominal maximum particle size, and the analysis method discloses the mechanism that the nominal maximum particle size improves the macroscopic performance of the material by regulating the internal force chain network and inhibiting damage accumulation, and provides a scientific microcosmic mechanical basis and a quantitative analysis tool for gradation optimization and high-performance design of the cement stabilized macadam base.

The application provides a kind of magnesium slag based filling body damage constitutive model construction method based on energy dissipation, and relates to filling body damage analysis technical field.The method first makes magnesium slag based filling body test piece under different magnesium slag powder grinding time conditions, and obtains the stress-strain curve of each test piece by test, analyzes the energy evolution curve of each test piece;Then the damage dissipation energy is introduced into the energy balance equation of filling body, and the damage variable related to damage dissipation energy is obtained;Then compare the damage constitutive model, construct the energy modified damage constitutive model of magnesium slag based filling body considering the compaction stage and residual strength;Finally, verify the effectiveness of the model.The energy modified damage constitutive model constructed by the application is reasonable and effective, which can well describe the damage evolution process of magnesium slag based filling body under uniaxial compression, realize quick and accurate magnesium slag based filling body damage analysis, and provide scientific reference for the safety of mine filling mining engineering.

To provide a method for evaluating the extrusion property of a cement composition for additional manufacture with which the extrusion property can be easily evaluated.SOLUTION: A method for evaluating the extrusion property of a cement composition 30 for additional manufacture is provided. The method includes filling the cement composition 30 for additional manufacture into a mold 20 having an opening 21 into which an extrusion jig 10 can be inserted at one end and a discharge port 22 for filler at the other end, then extruding the cement composition 30 for additional manufacture filled into the mold 20 by using the extrusion jig 10 connected to a uniaxial compression tester, determining the relationship between displacement and extrusion pressure with the uniaxial compression tester, and calculating the average extrusion pressure on the basis of the relationship.SELECTED DRAWING: Figure 1

The application provides an acidification fracturing fracture pressure prediction method considering rock mechanics property acid erosion degradation. The method comprises the following steps: subjecting the acid-eroded rock sample to uniaxial compression experiment and splitting experiment respectively; obtaining an acid-eroded rock mechanics parameter-acid erosion temperature-acid erosion time model according to the uniaxial compression experiment data and the splitting experiment data; integrating the acid-eroded rock mechanics parameter-acid erosion temperature-acid erosion time model into a conventional formation fracture pressure model to obtain an acidification fracturing fracture pressure prediction model considering rock mechanics property acid erosion degradation. The method comprehensively considers the influence of formation temperature and acid erosion time on reservoir mechanics property, can predict the acidification fracturing fracture pressure, and can provide a theoretical basis for field engineering parameter design.

The application provides a phanerocrystalline intrusive rock blasting simulation method and device, comprising the following steps: constructing an initial rock crystal sample uniaxial compression model according to the mesoscopic physical parameters of a target phanerocrystalline intrusive rock; generating a cohesive force unit on the contact interface between the grains in the uniaxial compression model to obtain a target rock crystal sample uniaxial compression model; performing a uniaxial compression simulation test on the target rock crystal sample uniaxial compression model, obtaining test simulation data, correcting parameters through a back analysis method, obtaining target material parameters of the target phanerocrystalline rock, and constructing a rock crystal medium blasting construction FDEM model; and performing blasting simulation on the target phanerocrystalline intrusive rock according to the rock crystal medium blasting construction FDEM model and blasting parameters. Therefore, the finite-discrete coupling blasting simulation method can not only reduce the cost and time consumption, but also quantitatively represent the dynamic response law and damage mechanism of the rock mass in the blasting process.