CN107814546B - High-intensitive high high severe analog material of brittleness of deep hard rock and preparation method thereof - Google Patents

High-intensitive high high severe analog material of brittleness of deep hard rock and preparation method thereof Download PDF

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Publication number
CN107814546B
CN107814546B CN201710975755.7A CN201710975755A CN107814546B CN 107814546 B CN107814546 B CN 107814546B CN 201710975755 A CN201710975755 A CN 201710975755A CN 107814546 B CN107814546 B CN 107814546B
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calcite
sand
powder
brittleness
mass ratio
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CN107814546A (en
Inventor
冯夏庭
祝国强
韩勇
张頔
李正伟
辜良杰
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Wuhan Institute of Rock and Soil Mechanics of CAS
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Wuhan Institute of Rock and Soil Mechanics of CAS
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00991Uses not provided for elsewhere in C04B2111/00 for testing
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/54Substitutes for natural stone, artistic materials or the like
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/20Mortars, concrete or artificial stone characterised by specific physical values for the density
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The invention belongs to geotechnical engineering three-dimensional physical model experimental technique fields, disclose high high severe analog material of brittleness of a kind of deep hard rock high intensity and preparation method thereof;According to component, the analog material includes aggregate: calcite sand, dolomite sand and calcite in powder;Cementing material: cement and gypsum.Analog material provided by the invention and preparation method thereof selects protolith main component calcite sand, calcite in powder to improve material fragility, and when preparation is closely knit by material, is conducive to improve the strength of materials and plays the Brittleness of calcite;In view of the influence of gradation, different types of particles of aggregates selects different sizes, and High Temperature Curing is used after the completion of preparation, formed it is similar with deep hot environment breed condition, improve the similarity of material;The feature of silk screen griotte is successfully simulated, producing efficiency is high, material property is stable, from a wealth of sources.

Description

High-intensitive high high severe analog material of brittleness of deep hard rock and preparation method thereof
Technical field
The present invention relates to geotechnical engineering three-dimensional physical model experimental technique field, in particular to a kind of deep hard rock is high-intensitive High high severe analog material of brittleness and preparation method thereof.
Background technique
It is often sent out in the Process of Engineering Construction such as water conservancy and hydropower, traffic, Surrounding Nuclear Waste Repositories processing, deep physics subterranean laboratory Raw rock burst, causes huge economic loss, casualties etc..It is had been achieved for by the means of field monitoring many important Achievement, but field test influence factor is complicated, constitutes biggish threat by the constraint of geological conditions, and to the safety of personnel. Therefore, the engineering-environment that the scene of reproduction is tested by three-dimensional physical model, sets different influence factors, avoids the peace of personnel Full blast danger, convenient for deeper into research rock burst hazard problem.
Rock burst, which often betides to excavate under large ground pressure, unloads load, has sudden, severity, when surrounding rock failure generates Phenomena such as peeling, wall caving and ejection, the rock mass that rock burst occurs have many characteristics, such as high-intensitive and high brittleness.
Analog material is the element task of physical experiments, is the premise of model test success or failure, therefore, develops satisfaction The analog material of the theory of similarity is most important.By the constraint of loading equipemtn and the principle of similitude, the intensity of analog material is far below deep Portion's hard rock, therefore the strain energy assembled when material stress is far below deep hard rock, causes to be difficult to produce rock burst in laboratory Phenomenon is launched, the brittleness effect of material is poor.In the prior art, the analog material with Rock burst proneness is expanded and is deeply ground Study carefully, also achieves many achievements.It specifically includes that through quartz sand, barite sand, blanc fixe, gypsum, rosin alcoholic solution etc. Raw material has developed a series of fragile material, and the brittleness effect of these materials relies primarily on the effect of cementing matter, and intensity is low, And Factor of Brittleness (pressure Lapie) is below 20, does not have high brittleness.Intensity and Brittleness are three-dimensional physical model experimental studies The important factor in order of rock burst hazard problem, therefore, it is necessary to carry out deeper into research, to obtain higher intensity and brittle Analog material.
Summary of the invention
The present invention provides a kind of high-intensitive high high severe analog material of brittleness of deep hard rock, solves similar material in the prior art Expect that intensity is low, the technical problem of brittleness difference.
In order to solve the above technical problems, the present invention provides a kind of similar materials of the high high severe of brittleness of deep hard rock high intensity Material, according to component, the analog material includes,
Aggregate: calcite sand, dolomite sand and calcite in powder;
Cementing material: cement and gypsum.
Further, using the quality of the calcite sand as unit quality, the component proportion of each component are as follows:
The mass ratio of calcite sand and dolomite sand is 0.25~4.00, the quality sum of calcite sand and dolomite sand with The mass ratio of cementing material is 1.50~3.15, and the mass ratio of gypsum and cement is 0.89~4.00, calcite in powder and the glue The mass ratio for tying material is 0.1.
Further, the calcite sand grains diameter is 40~60 mesh, and the dolomite sand partial size is 100~120 mesh, described Calcite in powder partial size is 300~325 mesh.
High high severe analog material of brittleness of a kind of deep hard rock high intensity and preparation method thereof, comprising:
Calcite sand, calcite in powder, dolomite sand, gypsum, cement and PbO powder are weighed, is uniformly mixing to obtain after mixing mixed Close solid material;
Weighing water is mixed with water-reducing agent to be mixed thoroughly to obtain mixed solution;
The mixed solution is poured into the solid material of the mixing, is fitted into mold after mixing evenly;
In mold after material initial set, with the closely knit molding of press machine;
Material demoulds after conserving at dry and ventilated indoors;
It is conserved under the conditions of Indoor Natural, then uses High Temperature Curing, until material hardening terminates, constant mass.
Further, using the quality of the calcite sand as unit quality, the component proportion of each component are as follows:
The mass ratio of calcite sand and dolomite sand is 0.25~4.00, calcite sand and dolomite sand quality sum and glue The mass ratio for tying material is 1.50~3.15, and the mass ratio of gypsum and cement is 0.89~4.00, calcite in powder with it is described cementing The mass ratio of material is 0.1.
Further, the calcite sand grains diameter is 40~60 mesh, and the dolomite sand partial size is 100~120 mesh, described Calcite in powder partial size is 300~325 mesh.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
The high-intensitive high high severe analog material of brittleness of the deep hard rock provided in the embodiment of the present application, changes forefathers with glue The mode of matter controlled material property is tied, physical property and micro character based on protolith are used in the method for aggregate controlled material property, Select protolith main component calcite sand and calcite in powder to improve material fragility;When preparation, close material makes between particle Fine and close mosaic texture is formed, be conducive to improve the strength of materials and plays the Brittleness of calcite.In view of the influence of gradation, no The particles of aggregates of same type selects different sizes, uses High Temperature Curing after the completion of preparation.
Further, the high brittleness for realizing analog material breaches the brittleness effect of the analog material of forefathers' development;Phase Meet the theory of similarity like material and protolith main physico-mechanical parameter (severe, plays mould, Poisson's ratio, tensile strength at UCS), success Simulate high-intensitive, high brittleness, the feature of Gao Chongdu of deep hard rock;Meanwhile producing efficiency is high, material property is stablized.
Detailed description of the invention
Fig. 1 is analog material single compressing stress-strain curve provided in an embodiment of the present invention.
Specific embodiment
The embodiment of the present application solves existing skill by providing a kind of high-intensitive high high severe analog material of brittleness of deep hard rock Analog material intensity is low in art, the technical problem of brittleness difference.
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper It states technical solution to be described in detail, it should be understood that the specific features in the embodiment of the present invention and embodiment are to the application skill The detailed description of art scheme, rather than the restriction to technical scheme, in the absence of conflict, the embodiment of the present application And the technical characteristic in embodiment can be combined with each other.
The application selects protolith main component calcite sand, calcite in powder to improve material fragility, and when preparation is close by material It is real, be conducive to improve the strength of materials and play the Brittleness of calcite, it is contemplated that the influence of gradation, different types of aggregate Grain-by-grain seed selection different size uses High Temperature Curing after the completion of preparation, forms the breed condition similar with deep hot environment, improves The similarity of material.
A kind of high-intensitive high high severe analog material of brittleness of deep hard rock, according to component, the analog material includes,
Aggregate: calcite sand, dolomite sand and calcite in powder;
Cementing material: cement and gypsum.
In general, using the quality of the calcite sand as unit quality, the component proportion of each component are as follows:
The mass ratio of calcite sand and dolomite sand is 0.25~4.00, the quality sum of calcite sand and dolomite sand with The mass ratio of cementing material is 1.50~3.15, and the mass ratio of gypsum and cement is 0.89~4.00, calcite in powder and the glue The mass ratio for tying material is 0.1.
Further, the calcite sand grains diameter is 40~60 mesh, and the dolomite sand partial size is 100~120 mesh, described Calcite in powder partial size is 300~325 mesh.The influence of gradation is fully taken into account, different types of particles of aggregates selects different rulers It is very little so that cooperate High Temperature Curing after the completion of preparation, formed it is similar with deep hot environment breed condition, improve the similar of material Degree.
The present embodiment also provides a kind of preparation method based on above-mentioned material.
A kind of high-intensitive high high severe analog material preparation method of brittleness of deep hard rock, comprising:
Calcite sand, calcite in powder, dolomite sand, gypsum, cement and PbO powder are weighed, is uniformly mixing to obtain after mixing mixed Close solid material;
Weighing water is mixed with water-reducing agent to be mixed thoroughly to obtain mixed solution;
The mixed solution body is poured into the solid material of the mixing, is fitted into mold after mixing evenly;
In mold after material initial set, with the closely knit molding of press machine;
Material demoulds after conserving at dry and ventilated indoors;
It is conserved under the conditions of Indoor Natural, then uses High Temperature Curing, until material hardening terminates, constant mass.
The present embodiment additionally provides a kind of specific material component and formula:
Aggregate is calcite sand (40 mesh), dolomite sand (100 mesh), calcite in powder (325 mesh), and cementing agent is cement, stone Cream, additive are water-reducing agent, lead monoxide, water.Wherein, mastic mass ratio is 2.27, gypsum cement mass ratio is 1.16, Fang Xie It is total that stone sand and dolomite sand mass ratio are 0.56, calcite in powder accounts for the 10% of cementing material quality, lead monoxide accounts for solid material Amount 46.1%, amount of water be solid material quality 17%.
The present embodiment additionally provides the preparation method of the analog material, and operating procedure is as follows:
(1) claim a certain amount of solid material: calcite sand, calcite in powder, dolomite sand, gypsum, cement and PbO powder, mix It is stirred evenly after conjunction;
(2) water of weighed amount, water-reducing agent is poured into water and is mixed thoroughly;
(3) mixing liquid is poured into solid material, is fitted into inner wall after mixing evenly and is coated in the mold of release agent;
(4) after material initial set, apply the load of 11.8kn for the closely knit molding of material;
(5) material demoulds after conserving 12h at dry and ventilated indoors;
(6) continue to conserve 60h under the conditions of Indoor Natural, then use 120 DEG C of High Temperature Curings, until material hardening terminates, matter It measures constant.
To keep a kind of high-intensitive high high severe analog material preparation method of brittleness of deep hard rock of the present embodiment proposition more clear Chu is easy to operate, and further instruction is unfolded to principle, test method, step, feature with reference to embodiments.
The development of analog material must propose the thinking of research first, select suitable raw material, preparation and maintenance method, Further in accordance with the theory of similarity, engineering background in conjunction with the embodiments calculates the likelihood ratio, so that it is determined that the physical and mechanical parameter of analog material, Finally be possible to make the analog material for meeting research purpose.
Physical property and micro character based on protolith are used in the method for aggregate controlled material property, select protolith mainly group To improve material fragility, when preparation, is closely knit by material for point calcite sand, calcite in powder, makes to form densification between particle and inlays knot Structure is conducive to improve the strength of materials and plays the Brittleness of calcite, it is contemplated that the influence of gradation, different types of aggregate Grain-by-grain seed selection different size uses High Temperature Curing after the completion of preparation.
Deep brittle rock mass approximate linear elasticity before destruction, can in Elasticity equilibrium equation, geometric equation, Constitutive equation, primary condition and stress boundary condition derive the similarity criterion that analog material must meet.It is destroyed behind rock mass peak bent The similar of line is difficult to fully meet, and general approximate processing is linearity mole strength envelope.
According to equilibrium equation, geometric equation, constitutive equation, primary condition and the stress boundary condition in Elasticity, with And condition of similarity is destroyed behind peak, it can derive the similarity relation of physical and mechanical parameter, as follows:
Cσ=CE=CC=CL
Wherein, Cσ、CE、CC、CLCε、Cυ、CγRespectively indicate stress, elasticity modulus, cohesive strength, geometry, interior friction Angle, strain, Poisson's ratio, bulk density affinity constant.
The embodiment of the present invention is using silk screen subterranean laboratory the second stage of the project as research background, and tunnel sectional dimension is 14m × 14m, three-dimensional physical model test cavern excavation having a size of 0.4m × 0.4m, and therefore, geometric similarity constant is
Therefore, ideal similar material physical and mechanical parameters are obtained, as shown in table 1
The ideal analog material of table 1 and protolith physical and mechanical parameter
The main composition of raw material of the invention are as follows: aggregate be calcite sand (40 mesh), dolomite sand (100 mesh), side It solves mountain flour (325 mesh), cementing agent is cement, gypsum, and additive is water-reducing agent, lead monoxide, water.
The mix proportion scheme of analog material of the invention is as shown in table 4.
4 similar material mixture testing program of table
The measurement of analog material mechanics parameter provided by the invention is determined using uniaxial compression test and diametral compression test Bulk density γ, uniaxial compressive strength UCS, tensile strength TS, Factor of Brittleness K, as shown in table 5.
5 similar material physical and mechanical parameters of table
From table 5 it can be seen that, the UCS of the 5th group of testing program, Factor of Brittleness, severe be respectively 4.80MPa, 21.68, 28.43kn·m-3, meet the requirement of silk screen griotte analog material, be the similar material of ideal for simulating silk screen griotte Rockburst Problem Material.
Referring to Fig. 1, in the 8th group of mix proportion scheme, UCS is up to 7.91MPa, and Factor of Brittleness is also up to 24.91, and severe is 27.1kn·m-3Breaching current material has the characteristics that high brittleness, high intensity, Gao Chongdu, analog material provided by the invention are Completely new.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
What is provided in the embodiment of the present application is used to simulate the deep hard rock analog material with rock burst feature, changes forefathers In a manner of cementing matter controlled material property, physical property and micro character based on protolith are used with aggregate controlled material property Method selects protolith main component calcite sand, calcite in powder to improve material fragility;When preparation, by close material, make particle Between form fine and close mosaic texture, be conducive to improve the strength of materials and play the Brittleness of calcite.In view of the shadow of gradation It rings, different types of particles of aggregates selects different sizes, uses High Temperature Curing after the completion of preparation.
Further, the high brittleness for realizing analog material breaches the brittleness effect of the analog material of forefathers' development;Phase Meet the theory of similarity like material and protolith main physico-mechanical parameter (severe, plays mould, Poisson's ratio, tensile strength at UCS), success Simulate high-intensitive, high brittleness, the feature of Gao Chongdu of deep hard rock;Meanwhile producing efficiency is high, material property is stablized.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it, Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover In the scope of the claims of the present invention.

Claims (2)

1. a kind of high-intensitive high high severe analog material of brittleness of deep hard rock, which is characterized in that according to component, the analog material Including,
Aggregate: calcite sand, dolomite sand and calcite in powder;
Cementing material: cement and gypsum;
Using the quality of the calcite sand as unit quality, the component proportion of each component are as follows:
The mass ratio of calcite sand and dolomite sand is 0.25~4.00, calcite sand and dolomite sand quality sum and agglutination material The mass ratio of material is 1.50~3.15, and the mass ratio of gypsum and cement is 0.89~4.00, calcite in powder and the cementing material Mass ratio be 0.1;
The calcite sand grains diameter is 40~60 mesh, and the dolomite sand partial size is 100~120 mesh, the calcite in powder partial size For 300~325 mesh.
2. a kind of high-intensitive high high severe analog material preparation method of brittleness of deep hard rock characterized by comprising
Calcite sand, calcite in powder, dolomite sand, gypsum, cement and PbO powder are weighed, it is solid that mixing is uniformly mixing to obtain after mixing Material;
Weighing water is mixed with water-reducing agent to be mixed thoroughly to obtain mixed solution;
The mixed solution body is poured into the solid material of the mixing, is fitted into mold after mixing evenly;
In mold after material initial set, with the closely knit molding of press machine;
Material demoulds after conserving at dry and ventilated indoors;
It is conserved under the conditions of Indoor Natural, then uses High Temperature Curing, until material hardening terminates, constant mass;
Using the quality of the calcite sand as unit quality, the ratio of each component is:
The mass ratio of calcite sand and dolomite sand is 0.25~4.00, the quality sum of calcite sand and dolomite sand with it is cementing The mass ratio of material is 1.50~3.15, and the mass ratio of gypsum and cement is 0.89~4.00, calcite in powder and the agglutination material The mass ratio of material is 0.1;
The calcite sand grains diameter is 40~60 mesh, and the dolomite sand partial size is 100~120 mesh, the calcite in powder partial size For 300~325 mesh.
CN201710975755.7A 2017-10-19 2017-10-19 High-intensitive high high severe analog material of brittleness of deep hard rock and preparation method thereof Expired - Fee Related CN107814546B (en)

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CN108530004A (en) * 2018-03-30 2018-09-14 中国科学院武汉岩土力学研究所 Crisp ductility analog material of a kind of deep rock bullet modeling and preparation method thereof
CN108439914A (en) * 2018-05-16 2018-08-24 中国人民解放军陆军工程大学 A kind of high-strength Geomechanical Similar Material of cement base and preparation method thereof
CN109064866A (en) * 2018-08-29 2018-12-21 中国科学院武汉岩土力学研究所 A kind of high severe feature physics modelling device and method of the high brittleness of high intensity
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