CN105675365A - Method for preparing fractured rock mass samples with filler - Google Patents
Method for preparing fractured rock mass samples with filler Download PDFInfo
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- CN105675365A CN105675365A CN201610032124.7A CN201610032124A CN105675365A CN 105675365 A CN105675365 A CN 105675365A CN 201610032124 A CN201610032124 A CN 201610032124A CN 105675365 A CN105675365 A CN 105675365A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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Abstract
The invention discloses a method for preparing fractured rock mass samples with filler.The method includes steps of (1), constructing three-dimensional digital models of the to-be-prepared samples according to geometrical morphology of actual fracture rock masses and morphology and distribution of fractures in the rock masses and inputting the three-dimensional digital models into a 3D (three-dimensional) printer; (2), simulating the actual fracture rock mass, preparing rock portions for forming the samples and raw materials for fracture fillings, forming fractures of the samples from the water-soluble raw materials, respectively arranging the three types of raw materials in different spray nozzles of the 3D printer and acquiring initial samples with the fillings by means of 3D printing; (3), soaking the initial samples in water and completely dissolving the water-soluble materials to obtain the final samples.The method has the advantages that the samples can be prepared without molds, the samples prepared by the aid of the method contain the fillings, and accordingly the shortcoming of incapability of filling fractures of samples with powdery solid particles to form fillings in the prior art can be overcome.
Description
Technical field
The preparation method that the present invention relates to a kind of rock mass sample, particularly to a kind of preparation method containing filling fracture rock mass sample.
Background technology
Crack rock is a kind of medium being frequently encountered in engineering. With intact rock, crack rock differs primarily in that crack rock contains more structural plane, the mechanical property of crack rock is mainly controlled by these structural planes. Test be rock mechanics field through frequently with a kind of research method, but because the polytropy of natural fissure rock mass geometric properties, different rock cranny differences are big, the rock mass sample taking from natural fissure rock mass is not representative, and field experimentation working condition is complicated, infusion of financial resources is big, therefore generally adopts the method for laboratory test artificial sample preparation that the mechanical property of crack rock is studied, but the method preparing artificial crack rock sample relatively more incomplete at present. And, some crack rock also includes some charges, owing to the fractured zones containing filling fracture rock mass is in the inside of rock mass, powdery solid granules cannot be packed in crack by traditional method preparing sample.
Prepare crack rock sample at present or the method containing filling fracture rock mass sample mainly include several as follows:
1, the patent No. is in the Chinese utility model patent " combined three-dimensional crack rock sampling die " of 201520131517.4, disclose a kind of three-dimensional fracture rock mass sample preparation mold, this mould is by base, frame structure, plate, and crack apparatus for adjusting position forms; When making the rock sample of difformity, physical dimension, it is necessary to make new mould, take time and effort, relatively costly;
2, application number is in the Chinese invention patent application " manufacture method of a kind of random fissure rock sample " of 201410052815.4, disclosing a kind of by tin bar and mortar material mix and blend, tin bar becomes the preparation method that powder forms the random crack rock sample in crack, crack at low temperatures; By the size in the uncontrollable crack of crack rock sample that the method is produced, spatial shape, quantity and distribution situation, it is impossible to meet test requirements document;
3, application number is in the Chinese invention patent application " manufacture method of interrupted filling fracture rock sample model " of 201510101177.5, disclose a kind of sheeting by simulation crack and be fixed in sampling die with water-soluble line, again mixed material lamination is poured in the sample mould smearing release agent, after heating, be removed from the molds the manufacture method obtaining interrupted filling fracture rock sample model; The method is used to make rock sample crack comparatively single, the crack rock containing complicated crack cannot be produced, and its fracture filling is thin slice simulation material, it is not inconsistent with actual fracture filling, after rock sample is made, rock mass is easily damaged by knockout course, coupon results is caused uncontrollable impact.
In sum, prepare at present and when needing to manufacture new mould, underaction, the shape that can not effectively control crack and distribution, the demoulding when method ubiquity of crack rock sample the change of rock mass size, crack is damaged, the problems such as complicated fissured structure can not be constructed, therefore in the urgent need to a kind of method preparing crack rock sample that comparison is complete.
Summary of the invention
Goal of the invention: it is an object of the invention to provide a kind of preparation method containing filling fracture rock mass sample, actual rock mass can fully be simulated by the crack rock sample that the method makes, and sample does not need the demoulding, can guarantee that the integrity of sample.
Technical scheme: the present invention relates to a kind of preparation method containing filling fracture rock mass sample, comprise the steps:
(1) according to the form in crack in the geometric shape of actual crack rock and this rock mass and distribution, build in three-dimensional digital model this three-dimensional digital model input 3D printer of sample to be prepared;
(2) the actual crack rock of simulation is ready for being formed the raw material of charges in the sillar part of sample and crack, and be used for forming sample crack with water-soluble material for raw material, above-mentioned three kinds of raw materials are respectively placed in the different shower nozzles of 3D printer, printed by 3D, obtain the preliminary sample containing charges;
(3) this preliminary sample is immersed in water, makes water-soluble material be completely dissolved, obtain final sample.
The present invention adopts 3D printing technique, is accurately controlled form and the distribution in crack; The sillar part of sample, sample crack and crack inner stuffing are printed simultaneously, namely the final sample formed after immersion itself contains crack and charges.
In above-mentioned steps (1), use the three-dimensional digital model of actual crack rock described in SolidWorks software building.
Concrete, in step (2), simulate the mechanical property preparation cement of actual crack rock, with the sillar part of this water mud as a raw material printed sample.
Preferably, cement is pulverized fuel ash cement. The pulverized fuel ash cement heat of hydration is low, and drying shrinkage is good with crack resistance, it is possible to make the crack rock that printing obtains reach ideal state.
In above-mentioned steps (2), in the crack for the treatment of excess syndrome border crack rock, charges make powder, with this powder for charges in raw material printed sample crack.
Preferably, water-soluble material is InfinityRinse-Away water-soluble material. It is with low cost, soluble in water, and is suitable for the print object of complexity.
Beneficial effect: compared with prior art, it is an advantage of the current invention that: (1) can directly obtain the sample containing charges by the method for the present invention, break away from the puzzlement needing first to make new mould when making new rock mass sample in prior art on the one hand, time saving and energy saving, greatly reduce cost; On the other hand the crack of gained sample of the present invention directly comprises charges, overcome in prior art to be packed in sample crack to form the defect of charges by powdery solid granules, and the charges in gained sample can fully simulate the charges in actual crack so that later experiments is more accurate; (2) present invention is by making three-dimensional digital model this model is carried out 3D printing, it is possible to accurately control the size in crack, spatial shape, quantity and distribution situation, and gained sample can the structure of the actual crack rock of full simulation and mechanical property; (3) present invention uses water-soluble material to form sample fissured structure; print the preliminary sample obtained after immersion; water-soluble material dissolves; required crack can be obtained; fissured structure can be protected well, it is to avoid to causing uncontrollable destruction inside rock mass sample during the conventional art demoulding.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of the present invention;
Fig. 2 is the three-dimensional digital model in embodiments of the invention containing filling fracture rock mass.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is described further.
Such as Fig. 1, a kind of preparation method containing filling fracture rock mass sample of the present invention, comprise the steps:
(1) according to the form in crack in the geometric shape of actual crack rock and this rock mass and distribution, build in three-dimensional digital model this three-dimensional digital model input 3D printer of sample to be prepared;
Such as by using the three-dimensional digital model of actual crack rock described in SolidWorks software building, when building the three-dimensional digital model of actual crack rock, this model is generally the cylinder of Φ 50mm × 100mm, it is possible to various sizes of model is set up in experimental requirement; By making three-dimensional digital model, it is possible to accurately control the size in crack, spatial shape, quantity and distribution situation, gained sample can the structure of the actual crack rock of full simulation and mechanical property;
(2) the actual crack rock of simulation is ready for being formed the raw material of charges in the sillar part of sample and crack, can pass through to simulate the mechanical property of actual crack rock, preparation cement, print with this water mud as a raw material and form sample sillar part, the mechanical property of actual crack rock is simulated as can be selected for pulverized fuel ash cement, the pulverized fuel ash cement heat of hydration is low, and drying shrinkage is good with crack resistance, it is possible to make the crack rock that printing obtains reach ideal state; Powder can be made by the charges in the crack rock for the treatment of excess syndrome border, print with this powder for raw material and form charges in sample crack; And to use water-soluble material be that raw material prints and forms sample crack, this water-soluble material can be InfinityRinse-Away water-soluble material, and it is with low cost, soluble in water, and is suitable for complicated print object; The three of above-mentioned preparation kinds of raw materials are respectively placed in the different shower nozzles of 3D printer, this three-dimensional digital model is carried out 3D printing, obtain the preliminary sample containing charges;
Adopt 3D printing to prepare sample, break away from the puzzlement needing first to make new mould when making new rock mass sample in prior art, time saving and energy saving, greatly reduce cost; And by charges in different shower nozzles printed sample sillar part, sample crack and crack simultaneously, gained sample comprises in fissured structure and this fissured structure and comprise charges, overcome in prior art and powdery solid granules cannot be packed in sample crack to form the defect of charges; Additionally, charges in actual crack rock are made powder, filters out the dusty raw materials of different-grain diameter, as the raw material of gapfiller in printed sample, charges in gained sample can fully simulate the charges in actual crack so that later experiments is more accurate;
(3) this preliminary sample is immersed in water, makes water-soluble material be completely dissolved, obtain final sample.
Water-soluble material is used to form sample fissured structure; printing the preliminary sample obtained after immersion, water-soluble material dissolves, and can obtain required crack; fissured structure can be protected well, it is to avoid to causing uncontrollable destruction inside rock mass sample during the conventional art demoulding.
Embodiment
Preparation simulate certain large hydropower station dam ground place containing filling fracture rock mass sample, this large hydropower station dam ground is made up of the rock mass with the plane of fracture, is called Dam Foundation Rock.
(1) by Dam Foundation Rock crack being described, measure and analyzing, determine the length and width in the crack of this place's crack rock, spatial distribution and quantity, determine the distribution characteristics in the cracks such as the physical dimension of sample to be prepared, the length and width in crack, spatial distribution and quantity according to similarity relation; Using computer aided design software (SolidWorks) to build the three-dimensional digital model of sample to be prepared, this model is the cylinder of Φ 50mm × 100mm, such as Fig. 2;
(2) raw material is prepared: simulating the mechanical property of this place's crack rock, preparation pulverized fuel ash cement is placed in first shower nozzle of 3D printer; The charges determined in this crack rock crack, place are weathered granite, this weathered granite is pressed into powder and filters out different particle diameters, are placed in second shower nozzle of 3D printer; InfinityRinse-Away water-soluble material is placed in the 3rd shower nozzle of 3D printer;
(3) three-dimensional digital model of step (1) component is inputted this 3D printer, three shower nozzles of printer the rock mass part of printed sample, crack and crack inner stuffing simultaneously, obtain the preliminary sample containing charges;
(4) being immersed in water by this preliminary sample, soluble material dissolves, and forms sample crack; Be 20 ± 2 DEG C in temperature, when relative humidity standard is 95%, to sample maintenance 28d, can obtain simulating this place's crack rock containing filling fracture rock mass sample.
Claims (6)
1. the preparation method containing filling fracture rock mass sample, it is characterised in that comprise the steps:
(1) according to the form in crack in the geometric shape of actual crack rock and this rock mass and distribution, build the three-dimensional digital model of sample to be prepared and this three-dimensional digital model is inputted in 3D printer;
(2) the actual crack rock of simulation is ready for being formed the raw material of charges in the sillar part of sample and crack, and be used for forming sample crack with water-soluble material for raw material, above-mentioned three kinds of raw materials are respectively placed in the different shower nozzles of 3D printer, printed by 3D, obtain the preliminary sample containing charges;
(3) this preliminary sample is immersed in water, makes water-soluble material be completely dissolved, obtain final sample.
2. the preparation method containing filling fracture rock mass sample according to claim 1, it is characterised in that in step (1), uses the three-dimensional digital model of actual crack rock described in SolidWorks software building.
3. the preparation method containing filling fracture rock mass sample according to claim 1, it is characterised in that in step (2), simulates the mechanical property preparation cement of described actual crack rock, with the sillar part of this water mud as a raw material printed sample.
4. the preparation method containing filling fracture rock mass sample according to claim 3, it is characterised in that described cement is pulverized fuel ash cement.
5. the preparation method containing filling fracture rock mass sample according to claim 1, it is characterised in that in step (2), takes charges in the crack of described actual crack rock and makes powder, with this powder for charges in raw material printed sample crack.
6. the preparation method containing filling fracture rock mass sample according to claim 1, it is characterised in that described water-soluble material is InfinityRinse-Away water-soluble material.
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| CN106018038A (en) * | 2016-07-13 | 2016-10-12 | 中国地质大学（武汉） | Method and device for manufacturing landslide physical model |
| CN106124272A (en) * | 2016-08-02 | 2016-11-16 | 中国科学院武汉岩土力学研究所 | A kind of analog material rock mass sample Among Intermittent Joints is accurately positioned producing device |
| CN106738192A (en) * | 2017-01-19 | 2017-05-31 | 中国地质大学（武汉） | The method and Landslide Model analog material of a kind of 3D printing landslide physical |
| CN106769322A (en) * | 2017-01-11 | 2017-05-31 | 河海大学 | A kind of prismatical joint rock mass preparation method of sample of cylinder containing stomata |
| CN107553688A (en) * | 2017-10-17 | 2018-01-09 | 河北工业大学 | A kind of powder system of broadcasting for being assemblied in cement-based material 3D printing system splits Intelligent robotic manipulator |
| CN108252336A (en) * | 2018-02-01 | 2018-07-06 | 重庆大学 | A kind of method that discontinuous body three-dimensional slope indoor model test is built by 3D printing technique |
| CN108519264A (en) * | 2018-04-09 | 2018-09-11 | 中国科学院武汉岩土力学研究所 | A kind of crack preparation method of sample and crack sample |
| CN108959823A (en) * | 2018-08-01 | 2018-12-07 | 天地科技股份有限公司 | A kind of crack opening mode and filled-type complexity crack rock physical model construction method |
| CN109001237A (en) * | 2018-09-25 | 2018-12-14 | 长安大学 | A kind of rock mass internal structure production method based on CT scan and 3D printing |
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| CN108959823B (en) * | 2018-08-01 | 2022-12-02 | 天地科技股份有限公司 | Fracture opening type and filling type complex fractured rock physical model construction method |
| CN108959823A (en) * | 2018-08-01 | 2018-12-07 | 天地科技股份有限公司 | A kind of crack opening mode and filled-type complexity crack rock physical model construction method |
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| CN110108529A (en) * | 2019-05-13 | 2019-08-09 | 河海大学 | A kind of rocks-concrete assembly preparation method of sample |
| CN110470522A (en) * | 2019-09-19 | 2019-11-19 | 东北大学 | A kind of method of prefabricated different water cut saturation degree rock mass of fracture network sample |
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| CN110907253A (en) * | 2019-12-22 | 2020-03-24 | 浙江省水利水电勘测设计院 | Mold and method for preparing cylindrical sample containing axial cracks |
| CN111693357A (en) * | 2020-07-02 | 2020-09-22 | 贵州大学 | Sample preparation mold and sample preparation method of fractured rock mass test piece based on 3D printing technology |
| CN113533001B (en) * | 2021-09-04 | 2023-09-26 | 山东科技大学 | Manufacturing method of artificial experiment sample imitating natural rock sample |
| CN113533001A (en) * | 2021-09-04 | 2021-10-22 | 山东科技大学 | Method for manufacturing artificial experimental sample imitating natural rock sample |
| CN114889124A (en) * | 2022-05-23 | 2022-08-12 | 昆明理工大学 | Preparation method of rock mechanics experiment test piece |
| CN114889124B (en) * | 2022-05-23 | 2023-12-15 | 昆明理工大学 | Rock mechanics experiment test piece preparation method |
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Application publication date: 20160615 |