CN103900882A - Rock test piece die for triaxial compression test on intermittent double-fracture rock - Google Patents
Rock test piece die for triaxial compression test on intermittent double-fracture rock Download PDFInfo
- Publication number
- CN103900882A CN103900882A CN201410139078.1A CN201410139078A CN103900882A CN 103900882 A CN103900882 A CN 103900882A CN 201410139078 A CN201410139078 A CN 201410139078A CN 103900882 A CN103900882 A CN 103900882A
- Authority
- CN
- China
- Prior art keywords
- mould
- rock
- test piece
- modules
- triaxial compression
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a rock test piece die for triaxial compression test on an intermittent double-fracture rock. The rock test piece die for the triaxial compression test on the intermittent double-fracture rock comprises a base and a middle frame die arranged on the base, wherein a gland is arranged on the top of the middle frame die; the middle frame die consists of two modules which are symmetrically buckled together and are provided with semicircular slots; fixing lugs are symmetrically arranged on the side walls of the two modules respectively; a bolt for integrally fixing the two modules is sleeved with the fixing lugs in a penetrating manner; rectangular wide slots for enabling a rectangular steel sheet to penetrate through and be positioned between the two modules are formed in the middle parts of the two modules. Compared with the prior art, the rock test piece die has the advantages of simple structure, easiness in machining, convenience in dismounting and mounting and fracture positioning accuracy; the precision and the efficiency for preparing a intermittent fracture rock material test piece.
Description
Technical field
The present invention relates to a kind of rocks test piece mould of triaxial compression test, especially a kind of rocks test piece mould that is applicable to true three-dimensional geological mechanical model and builds by laying bricks or stones the prefabricated interrupted two fissure rock triaxial compression tests of module.
Background technology
In rock mechanics field, fissure rock is a kind of complex dielectrics often running in the various rock engineerings such as mine, water conservancy, oil, nuke rubbish storage.Consider comparatively difficulty of prefabricated interrupted crack in true rock material, therefore by preparation rock type fragility scale model material, on the basis of cast material, prefabricated interrupted crack becomes the important means of inquiring into interrupted fissure rock brittle material strength deformation failure and Crack Extension feature.
Related die present Research is as follows:
CN200610042132.6 discloses a kind of ceramic test piece three-dimensional built-in crack manufacture method for fissure rock test.Mould wherein can prefabricated three-dimensional built-in type crack, but can not prefabricated three-dimensional run through type crack.
CN201110422886.5 discloses a kind of mould of making fissure surface of rock like test block, is mainly made up of chute, steel disc backstay, protractor, slide bar and steel disc.This mould can prefabricated square sample, but can not prefabricated right cylinder sample.
CN201210097450.8 discloses a kind of rocks test piece mould for rock mechanics field, is mainly made up of base, middle boxes mould and top board.This mould can prefabricated square complete sample, can not prefabricated right cylinder crack sample.
CN201220173136.9 discloses a kind of mould that different angles run through crack rocks material standard test specimen entirely of making, and is mainly made up of base plate, front and back side plate and dividing plate.This mould can not direct prefabricated right cylinder sample, but prefabricated square sample is polished into right cylinder sample.
CN201310073165.7 discloses a kind of rocks test piece mould that can accurately locate packed type prefabricated crack, and this mould is mainly made up of base, side plate, dividing plate, fixture, stud bolt and nut bolt.This mould can prefabricated rectangular parallelepiped sample, can not prefabricated right cylinder sample.
Summary of the invention
The object of the invention is the deficiency existing for prior art, a kind of rocks test piece mould for interrupted two fissure rock triaxial compression tests that is easy to processing, simple in structure, easy accessibility and crack accurate positioning be provided.
Rocks test piece mould for interrupted two fissure rock triaxial compression tests of the present invention, this mould comprises base, is located at the middle boxes mould on base, middle boxes mould top is provided with gland, described middle boxes mould is two module compositions that have half slot that symmetry snaps together, in two sidewalls, be arranged with respectively fixing ear, in fixing ear, be coated with the bolt that two modules are fixed as one, the middle part of described two modules is provided with can be by rectangle steel disc to wearing the rectangle sipes between two modules.
Described base is identical with gland structure, is made up of two different large small columns of radius, and the half slot of the radius of small column and middle boxes mould matches; Described can be two to fastening fixed rectangle sipes by rectangle steel disc, up and down dislocation horizontally, or homeotropic alignment mutually up and down; Described rectangle steel disc one end has pilot hole.
Beneficial effect: owing to having adopted technique scheme, the present invention can directly be prefabricated into the crack sample of cylindrical shape, be easy to the rocks test piece mould for interrupted two fissure rock triaxial compression tests of processing, simple in structure, easy accessibility and crack accurate positioning, this mould can become interrupted crack right cylinder rocks material sample by primary concreting, studies the mechanical characteristics of fissure rock for tests such as uniaxial compression and three axial compression contractings.Compared with prior art, tool has the following advantages:
1) the present invention can disposal molding column type sample, can obtain standard sample through simple polishing, can be used for studying the impact of crack on rocks characteristic of material mechanics in the tests such as three axial compression contractings.
2) the present invention is skillfully constructed, simple in structure, and easy accessibility has improved the loaded down with trivial details shortcoming of other mold releasabilities.
3) the present invention accurately locates position, crack by the rectangle sipes of middle boxes mould, and in prefabricated process, crack is difficult for dislocation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the main TV structure schematic diagram of middle boxes mould of the present invention.
Fig. 3 is middle boxes mould plan structure schematic diagram of the present invention.
In figure: 1-gland, 2-middle boxes mould, 3-rectangular channel, 4-fixes ear, 5-base, 6-bolt.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are further described:
As shown in Figure 1, the present invention is for the rocks test piece mould of interrupted two fissure rock triaxial compression tests, mainly by gland 1, middle boxes mould 2, base 5 forms, middle boxes mould 2 is located on base 5, gland 1 is located at the top of middle boxes mould 2, described middle boxes mould 2 is symmetrical two the module compositions that have half slot that snap together, in two sidewalls, be arranged with respectively fixing ear 4, in fixing ear 4, be coated with the bolt 6 that two modules are fixed as one, the middle part of described two modules is provided with can be by rectangle steel disc to wearing the rectangular channel 3 between two modules, described rectangle steel disc one end has pilot hole.The all parts of mould adopt metal material to make.
As shown in Figure 2, described can be two to fastening fixed rectangular channel 3 by rectangle steel disc, and not parallel arrangement up and down misplaces.
As shown in Figure 3, described base 5 is identical with gland 1 structure, is made up of two different large small columns of radius, and the half slot of the radius of small column and middle boxes mould 2 matches.
The course of work: first two middle boxes moulds 2 are combined, and be placed on base; Bolt is placed on to the fixing ear 4 on middle boxes mould 2, and tights a bolt; Afterwards the rocks material of certain proportioning is loaded in mould, and fully vibrated; On rectangle steel disc, smear a little butter, inserted in the rectangular channel 3 on middle boxes mould 2; Gland 1 is installed, is carried out test specimen compacting; Before test specimen solidifies not yet completely, extract rectangle steel disc, carry out form removal.First loose bolts, takes off gland 1 afterwards again, in the fixing ear 4 by bolt from middle boxes mould 2, takes out; Then the middle boxes mould 2 of two module compositions that snapped together by symmetry is opened, a side form piece that deviates from test specimen is shifted out; Take out the rocks material sample of moulding.
Claims (4)
1. the rocks test piece mould for interrupted two fissure rock triaxial compression tests, it is characterized in that, this mould comprises base (5), be located at the middle boxes mould (2) on base (5), middle boxes mould (2) top is provided with gland (1), described middle boxes mould (2) is symmetrical two the module compositions that have half slot that snap together, in two sidewalls, be arranged with respectively fixing ear (4), in fixing ear (4), be coated with the bolt that two modules are fixed as one, the middle part of described two modules is provided with can be by rectangle steel disc to wearing the rectangular channel (3) between two modules.
2. the rocks test piece mould for interrupted two fissure rock triaxial compression tests according to claim 1, it is characterized in that: described base (5) is identical with gland (1) structure, be made up of two different large small columns of radius, the half slot of the radius of small column and middle boxes mould (2) matches.
3. the rocks test piece mould for interrupted two fissure rock triaxial compression tests according to claim 1, is characterized in that: described can be two to fastening fixed rectangular channel (3) by rectangle steel disc, upper and lower Heterogeneous Permutation.
4. the rocks test piece mould for interrupted two fissure rock triaxial compression tests according to claim 1, is characterized in that: described rectangle steel disc one end has pilot hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410139078.1A CN103900882B (en) | 2014-04-08 | 2014-04-08 | Rocks test piece mould for the most double fissure rock triaxial compression tests |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410139078.1A CN103900882B (en) | 2014-04-08 | 2014-04-08 | Rocks test piece mould for the most double fissure rock triaxial compression tests |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103900882A true CN103900882A (en) | 2014-07-02 |
| CN103900882B CN103900882B (en) | 2016-12-07 |
Family
ID=50992345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410139078.1A Active CN103900882B (en) | 2014-04-08 | 2014-04-08 | Rocks test piece mould for the most double fissure rock triaxial compression tests |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103900882B (en) |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104181025A (en) * | 2014-09-10 | 2014-12-03 | 中国石油大学(华东) | Device for positioning preset single fracture in rock-like sample |
| CN104655466A (en) * | 2015-02-13 | 2015-05-27 | 成都理工大学 | Die for manufacturing brittle material cuboid model with cracks |
| CN104677704A (en) * | 2015-01-22 | 2015-06-03 | 山东大学 | Large-diameter test block molding mould capable of prefabricating, and operating method of large-diameter test block molding mould |
| CN104807685A (en) * | 2015-05-19 | 2015-07-29 | 中国矿业大学 | Joint test specimen method using 3D (three-dimensional) printing for making structure surface containing specific geometrical characteristics |
| CN105158039A (en) * | 2015-09-08 | 2015-12-16 | 河海大学 | Manufacturing method of simulation fracture for fractured rock mass seepage test |
| CN105527135A (en) * | 2014-10-23 | 2016-04-27 | 朱栗宝 | Apparatus for making pre-cracked sample for material mechanical properties test |
| CN105699140A (en) * | 2016-01-26 | 2016-06-22 | 河海大学 | Mold and method for preparing penetrating-fractured rock mass sample |
| CN105823663A (en) * | 2016-05-11 | 2016-08-03 | 中国海洋大学 | Mold for manufacturing hemi-discoid rock-like specimen with fracture surface and manufacturing method |
| CN105954073A (en) * | 2016-04-26 | 2016-09-21 | 西南石油大学 | Preparation method of artificial rock core used for testing physical and chemical performances of rock |
| 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 |
| CN106989968A (en) * | 2017-03-27 | 2017-07-28 | 山东大学 | The producing device and method of a kind of Seepage-stress coupling experiment three-dimensional fracture rocks test specimen |
| CN107300493A (en) * | 2017-08-23 | 2017-10-27 | 青岛理工大学 | A kind of hole rocks test sample-producing die and preparation method |
| CN107340167A (en) * | 2017-08-16 | 2017-11-10 | 中国矿业大学 | A kind of interrupted Built-Up Crack processing mold of rock-like materials standard specimen |
| CN107560911A (en) * | 2017-09-25 | 2018-01-09 | 长江大学 | Make rock sample mould |
| CN107782600A (en) * | 2017-10-23 | 2018-03-09 | 中国矿业大学 | A kind of mould and method for making prefabricated filling fracture and unfilling fracture Brazilian disk specimen |
| CN107917836A (en) * | 2017-12-08 | 2018-04-17 | 河南理工大学 | The preparation facilities of filler experiment of machanics standard specimen and the method that standard specimen is made using the device |
| CN108189249A (en) * | 2017-12-20 | 2018-06-22 | 西安科技大学 | For the experimental provision and its experimental method of the processing of rocks test specimen man-made fracture |
| CN108318318A (en) * | 2018-01-15 | 2018-07-24 | 中国矿业大学 | A kind of mold and method making the crack of the three-dimensional preformed containing filling rocks sample based on 3D printing technique |
| CN109085035A (en) * | 2018-08-27 | 2018-12-25 | 滨州学院 | The production method of the test specimen of rocks containing prefabricated crack |
| CN109655327A (en) * | 2018-12-21 | 2019-04-19 | 河南理工大学 | A kind of device for interrupted double cracks class rock test piece |
| CN109781484A (en) * | 2019-01-16 | 2019-05-21 | 徐丽侠 | A kind of adjustable mould of prefabricated joint test specimen |
| CN106124272B (en) * | 2016-08-02 | 2019-07-16 | 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 accurate positioning producing device |
| CN112268776A (en) * | 2020-11-17 | 2021-01-26 | 南京大学 | Preparation method of fractured soil compressive strength test sample |
| CN113970494A (en) * | 2021-10-25 | 2022-01-25 | 北京建筑大学 | Test piece of asphalt pavement interlayer material in local release state and shear strength evaluation method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020045446A (en) * | 2000-12-11 | 2002-06-19 | 안광현 | Mold to cure concrete specimen |
| CN102519767A (en) * | 2011-12-16 | 2012-06-27 | 武汉大学 | Mould for manufacturing fissure surface of rock like test block |
| CN202886159U (en) * | 2012-10-12 | 2013-04-17 | 四川大学 | Concrete sample pre-set template with cracks |
| CN103196717A (en) * | 2013-03-07 | 2013-07-10 | 同济大学 | Rock-similar sample mold capable of accurately positioning filling-type prefabricated cracks |
| CN103398881A (en) * | 2013-07-05 | 2013-11-20 | 中国人民解放军空军工程大学 | Columnar forming device for concrete materials |
| CN103616272A (en) * | 2013-11-26 | 2014-03-05 | 中国矿业大学(北京) | Mold and method for manufacturing intermittent-fissure rock mass simulating test piece |
-
2014
- 2014-04-08 CN CN201410139078.1A patent/CN103900882B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020045446A (en) * | 2000-12-11 | 2002-06-19 | 안광현 | Mold to cure concrete specimen |
| CN102519767A (en) * | 2011-12-16 | 2012-06-27 | 武汉大学 | Mould for manufacturing fissure surface of rock like test block |
| CN202886159U (en) * | 2012-10-12 | 2013-04-17 | 四川大学 | Concrete sample pre-set template with cracks |
| CN103196717A (en) * | 2013-03-07 | 2013-07-10 | 同济大学 | Rock-similar sample mold capable of accurately positioning filling-type prefabricated cracks |
| CN103398881A (en) * | 2013-07-05 | 2013-11-20 | 中国人民解放军空军工程大学 | Columnar forming device for concrete materials |
| CN103616272A (en) * | 2013-11-26 | 2014-03-05 | 中国矿业大学(北京) | Mold and method for manufacturing intermittent-fissure rock mass simulating test piece |
Non-Patent Citations (1)
| Title |
|---|
| 肖杰: "相似材料模型试验原料选择及配比试验研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ籍》 * |
Cited By (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104181025A (en) * | 2014-09-10 | 2014-12-03 | 中国石油大学(华东) | Device for positioning preset single fracture in rock-like sample |
| CN104181025B (en) * | 2014-09-10 | 2016-07-06 | 中国石油大学(华东) | The positioner of preset Single Fracture in a kind of rocks sample |
| CN105527135B (en) * | 2014-10-23 | 2018-09-04 | 朱栗宝 | A kind of producing device of the pre- precracked specimen of band of material mechanical performance test |
| CN105527135A (en) * | 2014-10-23 | 2016-04-27 | 朱栗宝 | Apparatus for making pre-cracked sample for material mechanical properties test |
| CN104677704A (en) * | 2015-01-22 | 2015-06-03 | 山东大学 | Large-diameter test block molding mould capable of prefabricating, and operating method of large-diameter test block molding mould |
| CN104655466A (en) * | 2015-02-13 | 2015-05-27 | 成都理工大学 | Die for manufacturing brittle material cuboid model with cracks |
| CN104655466B (en) * | 2015-02-13 | 2017-11-10 | 成都理工大学 | Make the mould with the rectangular body Model of crackle fragile material |
| CN104807685B (en) * | 2015-05-19 | 2017-09-05 | 中国矿业大学 | The joint samples method of the structural plane containing particular geometric feature is made using 3D printing |
| CN104807685A (en) * | 2015-05-19 | 2015-07-29 | 中国矿业大学 | Joint test specimen method using 3D (three-dimensional) printing for making structure surface containing specific geometrical characteristics |
| CN105158039A (en) * | 2015-09-08 | 2015-12-16 | 河海大学 | Manufacturing method of simulation fracture for fractured rock mass seepage test |
| CN105699140A (en) * | 2016-01-26 | 2016-06-22 | 河海大学 | Mold and method for preparing penetrating-fractured rock mass sample |
| CN105954073A (en) * | 2016-04-26 | 2016-09-21 | 西南石油大学 | Preparation method of artificial rock core used for testing physical and chemical performances of rock |
| CN105823663A (en) * | 2016-05-11 | 2016-08-03 | 中国海洋大学 | Mold for manufacturing hemi-discoid rock-like specimen with fracture surface and manufacturing method |
| CN105823663B (en) * | 2016-05-11 | 2018-07-03 | 中国海洋大学 | Make the mold and production method of rocks test specimen of the semi-disc with fissure-plane |
| 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 |
| CN106124272B (en) * | 2016-08-02 | 2019-07-16 | 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 accurate positioning producing device |
| CN106989968A (en) * | 2017-03-27 | 2017-07-28 | 山东大学 | The producing device and method of a kind of Seepage-stress coupling experiment three-dimensional fracture rocks test specimen |
| CN107340167A (en) * | 2017-08-16 | 2017-11-10 | 中国矿业大学 | A kind of interrupted Built-Up Crack processing mold of rock-like materials standard specimen |
| CN107300493A (en) * | 2017-08-23 | 2017-10-27 | 青岛理工大学 | A kind of hole rocks test sample-producing die and preparation method |
| CN107560911A (en) * | 2017-09-25 | 2018-01-09 | 长江大学 | Make rock sample mould |
| CN107782600A (en) * | 2017-10-23 | 2018-03-09 | 中国矿业大学 | A kind of mould and method for making prefabricated filling fracture and unfilling fracture Brazilian disk specimen |
| CN107917836A (en) * | 2017-12-08 | 2018-04-17 | 河南理工大学 | The preparation facilities of filler experiment of machanics standard specimen and the method that standard specimen is made using the device |
| CN108189249A (en) * | 2017-12-20 | 2018-06-22 | 西安科技大学 | For the experimental provision and its experimental method of the processing of rocks test specimen man-made fracture |
| CN108189249B (en) * | 2017-12-20 | 2023-08-11 | 西安科技大学 | Experimental device and experimental method for artificial crack processing of rock-like test piece |
| CN108318318A (en) * | 2018-01-15 | 2018-07-24 | 中国矿业大学 | A kind of mold and method making the crack of the three-dimensional preformed containing filling rocks sample based on 3D printing technique |
| CN109085035A (en) * | 2018-08-27 | 2018-12-25 | 滨州学院 | The production method of the test specimen of rocks containing prefabricated crack |
| CN109655327B (en) * | 2018-12-21 | 2021-03-19 | 河南理工大学 | Device for intermittent double-fracture rock mass test piece |
| CN109655327A (en) * | 2018-12-21 | 2019-04-19 | 河南理工大学 | A kind of device for interrupted double cracks class rock test piece |
| CN109781484A (en) * | 2019-01-16 | 2019-05-21 | 徐丽侠 | A kind of adjustable mould of prefabricated joint test specimen |
| CN109781484B (en) * | 2019-01-16 | 2021-06-01 | 徐丽侠 | Adjustable die for prefabricated joint test piece |
| CN112268776A (en) * | 2020-11-17 | 2021-01-26 | 南京大学 | Preparation method of fractured soil compressive strength test sample |
| CN113970494A (en) * | 2021-10-25 | 2022-01-25 | 北京建筑大学 | Test piece of asphalt pavement interlayer material in local release state and shear strength evaluation method |
| CN113970494B (en) * | 2021-10-25 | 2023-11-21 | 北京建筑大学 | Test piece and shear strength evaluation method for interlayer material of asphalt pavement in local release state |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103900882B (en) | 2016-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103900882A (en) | Rock test piece die for triaxial compression test on intermittent double-fracture rock | |
| CN102519767B (en) | Mould for manufacturing fissure surface of rock like test block | |
| CN202599724U (en) | Tooling used for manufacturing complete-penetration fracture class rock material standard samples with different angles | |
| CN202129654U (en) | Aligning clamp frock for fine reference surface of thin-wall casting | |
| CN206356923U (en) | Modularity quickly positions lathe floral disc | |
| CN205665072U (en) | A mould for making class rock brazilian disc model in coherent through cracks crack | |
| CN203798641U (en) | Sprayed concrete compression strength and impervious performance adjustable mobile sample preparation device | |
| CN101941157A (en) | Vertical fixture for engine cylinder to be milled | |
| CN202271066U (en) | Jig for linearly cutting circular workpiece | |
| CN106092714A (en) | A kind of rock-like materials cuboid sample sample preparation stage apparatus | |
| CN202318533U (en) | Concrete test die convenient for demoulding | |
| CN203381015U (en) | Refractory castable refractoriness under load sample mould | |
| CN203738973U (en) | Combined die for molding standard test piece for geotechnical test | |
| CN202726725U (en) | Precise grinding machine body | |
| CN201728604U (en) | Shaft pin processing tool | |
| CN203611341U (en) | Mold used for manufacturing unshaped refractory material heat shock test samples | |
| CN204171274U (en) | Submersible electric pump pump vane casting sand mold mould | |
| CN202943735U (en) | Silicon carbide ceramic plate mold | |
| CN207900155U (en) | A kind of assembly of sand core jig | |
| CN208214035U (en) | A kind of structure of the accurate punching mould of automotive wheels rocker arm | |
| CN203526991U (en) | Timing chain box locating surface machining tool | |
| CN203299043U (en) | Sample preparation mould for thermal constant measuring instrument by laser method | |
| CN204685856U (en) | A kind of straight mould die shank | |
| CN203061641U (en) | Processing device for one set of door | |
| CN202701042U (en) | Multiple pore position shaping structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 221116 Research Institute of China University of Mining and Technology,, Jiangsu Applicant after: China University of Mining & Technology Address before: 221116 Research Institute, China University of Mining and Technology, Xuzhou University, Jiangsu, China, Applicant before: China University of Mining & Technology |
|
| COR | Change of bibliographic data | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |