CN203705236U - True triaxial rock sample crack prefabricating device - Google Patents
True triaxial rock sample crack prefabricating device Download PDFInfo
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- CN203705236U CN203705236U CN201420026702.2U CN201420026702U CN203705236U CN 203705236 U CN203705236 U CN 203705236U CN 201420026702 U CN201420026702 U CN 201420026702U CN 203705236 U CN203705236 U CN 203705236U
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- prefabricated crack
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Abstract
The utility model relates to a true triaxial rock sample crack prefabricating device for rocks. The prefabricating device is composed of an upper clamping body, a lower clamping body, a lock bolt, a lock nut and a side fastening bolt, wherein wing plates are arranged on two sides of the clamping bodies; two pairs of locating holes are symmetrically formed in the wing plates; more than one prefabricated crack hole running through a web face is formed in the web face of each clamping body; the prefabricated crack holes comprise process through holes and guide holes; the guide holes are strip-shaped holes and the process through holes are located in the centers of the guide holes; two pairs of side fastening screw holes with screw threads are symmetrically formed in the side faces of the clamping bodies. By regulating sizes of the clamping bodies, the prefabricating device disclosed by the utility model can be used for manufacturing cracks of predetermined quantity, positions, sizes and angles on a true triaxial rock sample, so as to meet requirements of different rock sample sizes and different crack prefabricating schemes, thus facilitating implementation of experimental studies on rock multi-crack propagation and perforation failure mechanism thereof. The prefabricating device disclosed by the utility model is simple in structure, reasonable in design and convenient to use, cracks are efficient and feasible to manufacture, and the device is especially suitable for prefabricating of soft rack true triaxial rock sample cracks.
Description
Technical field
The utility model relates to a kind of rock mechanics experiment device, specifically the true three axle rock sample crackle fabricated device of a kind of rock.
Background technology
Rock is a kind of heterogeneous anisotropic and discrete complex structure body that includes joint, crackle, plane of weakness and tomography etc., and its destruction is that to connect by the opening of the discontinuous microfracture of rock interior, closed and expansion the glide plane producing caused.Multiple cracks expansion and perforation failure mechanism thereof in rock material are the important subject of rock fracture mechanics.Existing research great majority are the false triaxial tests for cylindrical rock sample, and compare false triaxial test, and true triaxial test makes sample unequal (in three principle stresses
σ 1>
σ 2>
σ 3) stress assembled state under, test findings more can reflect the real constitutive relation of rock sample.
The expansion of study of rocks material multiple cracks and two kinds of approach of the normal employing of perforation failure mechanism problem: (1) model test, adopt rocks material (as cement, gypsum, glass) and other compounds to prepare in proportion, mix crack sheet, built-in metal bar or polymer thin bar etc., precast and simulate rock sample containing the sample of crackle and carry out analog material test; (2) prefabricated macroscopic cracking in the true rock sample of making.Although cast material is the characteristic of simulation rock preferably, because rock is heterogeneous anisotropic, makes cast material can not reflect the mechanical characteristic of true rock itself completely.At present, on the rock sample test specimen of making, making crackle mainly contains by cut, in the making of the side of test specimen hacksaw, in the upper dragsaw making etc. of holing of circular arc fixture (201220266140.X).Laser heating can destroy mineralogical composition and the inner structure of rock sample, and laser precrack is applicable to the small specimen that thickness only has several millimeters, and the through-wall crack that is not suitable for true three axle rock samples (length of side 50mm, the rectangular parallelepiped of high 100mm) is made; Hacksaw can only be made crackle from test specimen side, can not study sample inside has the situation of crackle; Circular arc fixture is to require design according to the sample (right cylinder) of common three axles (false three axles) test, can not meet the test specimen requirement of true triaxial test.These are the actual conditions of simulation rock completely all.
Utility model content
The deficiency existing for above-mentioned current condition, the utility model provides a kind of true three axle rock sample crackle fabricated device.
The purpose of this utility model is achieved by the following technical programs:
A kind of true three axle rock sample crackle fabricated device, comprise two clamps 1, clamping screw 2, set nut 3 and side fastening bolt 4.Every clamp 1 middle part is spill channel-section steel shape, and openend both sides are respectively equipped with wing plate, and two involutory middle parts of clamp 1 are square tube type;
On the wing plate of every clamp 1 both sides, be respectively equipped with two pairs of pilot holes 7 with Central Symmetry.Clamp is respectively equipped with two double thread holes 8 on 1 two sides, middle part.The outside of belly at every clamp 1 middle part is rectangle, and the width of the outside of belly is made as X, and length is made as Y; On the described outside of belly, be laid with one or more the hole, prefabricated crack that connects the outside of belly, hole, prefabricated crack is made up of technique through hole 5 and pilot hole 6, pilot hole 6 is bar hole, technique through hole 5 is positioned at the center of pilot hole 6, and the angle on center line along its length of pilot hole 6 and the outside of belly between width directions X is fracture dip
α, and
αfor acute angle.The aperture of technique through hole 5 is d.The strip width of pilot hole 6 is h, and length is a.
Article two, in hole, above prefabricated crack, between hole, contiguous prefabricated crack, 2 nearest distances are rock bridge length b.Between hole, contiguous prefabricated crack, on nearest 2 lines and the outside of belly, the angle between width directions X is rock bridge inclination angle
β.
Two involutory recesses of clamp 1 are relatively setting up and down, be arranged on top for upper clamp, below be lower clamp, upper clamp and lower clamp are left and right symmetrical part.Hole, prefabricated crack uniform on the upper clamp outside of belly is corresponding up and down by pilot hole 7 with hole, prefabricated crack uniform on the lower clamp outside of belly, and is fixed together by clamping screw 2 and set nut 3.Side fastening bolt 4 is threaded in respectively in the threaded hole 8 of left and right sides of upper and lower clamp.
The position relationship in hole, described plural prefabricated crack is by rock bridge length b and rock bridge inclination angle
βdetermine.On the described outside of belly, be laid with the hole, three prefabricated cracks that connects the outside of belly.The fracture dip in first, second and third hole, prefabricated crack is respectively
α 1,
α 2,
α 3; Described the first hole, prefabricated crack and the second hole, prefabricated crack rock bridge length are b
1, and rock bridge inclination angle is
β 1; Described the first hole, prefabricated crack and the 3rd hole, prefabricated crack rock bridge length are b
2, and rock bridge inclination angle is
β 2.
Useful technique effect of the present utility model is embodied in following several aspect:
The utility model can be efficiently easily row ground at the inside precrack of true three axle rock samples, not only solve and adopted laser, side hacksaw and circular arc fixture true three axle rock samples to be made to the limitation of the method for crackle in the past, simultaneously can also be by quantity, diameter and the position of technique through hole on the size of change clamp, the clamp outside of belly, length, width and the inclination angle of guiding bar hole, to meet the demand of different rock sample sizes and the prefabricated scheme of different crackles, the experimental study of being convenient to carry out the expansion of rock multiple cracks and connecting failure mechanism;
2. the utility model is simple in structure, reasonable in design, easy to use, and crack makes efficiently feasible, and the crackle that is specially adapted to the true three axle rock samples of soft rock is prefabricated.
Accompanying drawing explanation
Fig. 1 is the utility model structural model figure.
Fig. 2 is the utility model upper clamp schematic diagram.
Fig. 3 is the utility model lower clamp schematic diagram.
Fig. 4 is the utility model upper clamp side sectional view.
Fig. 5 is the utility model structural front view.
Fig. 6 is the utility model structure vertical view.
Fig. 7 is the prefabricated flaw size of the utility model, angle schematic diagram.
Fig. 8 is that the utility model structural model uses state stereogram.
Fig. 9 is that the utility model structural model uses state front view.
Sequence number in figure, clamp 1, clamping screw 2, set nut 3, side fastening bolt 4, technique through hole 5, pilot hole 6, pilot hole 7, threaded hole 8, rock sample 9.
Below in conjunction with accompanying drawing, the utility model will be further described.
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 5.A kind of true three axle rock sample crackle fabricated device, comprise two clamps 1, clamping screw 2, set nut 3 and side fastening bolt 4.Every clamp 1 middle part is spill channel-section steel shape, and openend both sides are respectively equipped with wing plate, and two involutory middle parts of clamp 1 are square tube type.
Referring to Fig. 1, Fig. 6, Fig. 7.On the wing plate of every clamp 1 both sides, be respectively equipped with two pairs of pilot holes 7 with Central Symmetry.Clamp is respectively equipped with two double thread holes 8 on 1 two sides, middle part; On the wing plate of every clamp 1 both sides, be respectively equipped with two pairs of pilot holes 7 with Central Symmetry.Clamp is respectively equipped with two double thread holes 8 on 1 two sides, middle part.The outside of belly at every clamp 1 middle part is rectangle, and the width of the outside of belly is made as X, and length is made as Y; On the described outside of belly, be laid with one or more the hole, prefabricated crack that connects the outside of belly, hole, prefabricated crack is made up of technique through hole 5 and pilot hole 6, pilot hole 6 is bar hole, technique through hole 5 is positioned at the center of pilot hole 6, and the angle on center line along its length of pilot hole 6 and the outside of belly between width directions X is fracture dip
α, and
αfor acute angle.The aperture of technique through hole 5 is d.The strip width of pilot hole 6 is h, and length is a;
Article two, in hole, above prefabricated crack, between hole, contiguous prefabricated crack, 2 nearest distances are rock bridge length b.Between hole, contiguous prefabricated crack, on nearest 2 lines and the outside of belly, the angle between width directions X is rock bridge inclination angle
β.
Referring to Fig. 1, Fig. 5.Two involutory recesses of clamp 1 are relatively setting up and down, be arranged on top for upper clamp, below be lower clamp, upper clamp and lower clamp are left and right symmetrical part.Hole, prefabricated crack uniform on the upper clamp outside of belly is corresponding up and down by pilot hole 7 with hole, prefabricated crack uniform on the lower clamp outside of belly, and is fixed together by clamping screw 2 and set nut 3.Side fastening bolt 4 is threaded in respectively in the threaded hole 8 of left and right sides of upper and lower clamp; By changing width X, the length Y size of clamp 1 outside of belly, can meet the demand of the prefabricated scheme of different rock sample sizes and different cracks;
The quantity in the hole, upper prefabricated crack by increase and decrease clamp 1 outside of belly or change rock bridge length b, the rock bridge inclination angle between hole, prefabricated crack
β, or on center line along its length of length a, the width h, the pilot hole 6 that change pilot hole 6 bar shapeds and the outside of belly, the angle between width directions X is
α, can reach the demand of the prefabricated scheme in different cracks.
The main process following (referring to Fig. 8, Fig. 9) that true three axle rock sample precracks are made:
1, rock sample 9 is placed between upper clamp and lower clamp, clamping screw 2, through pilot hole 7, docks upper clamp with lower clamp, misplace with antiskid;
2, regulate side fastening bolt 4, make rock sample 9 placed in the middle and be close to the side fastening bolt 4 of clamp 1 left and right sides, guarantee, between clamp 1 and rock sample 9, left and right slippage not to occur;
3, then set nut 3 is enclosed within on clamping screw 2 and is tightened, so that clamp 1 is fixed, Shang Xia 1 both sides to make rock sample 9 be close to clamp, guarantee, between clamp 1 and rock sample 9, upper and lower slippage not to occur;
4, again tighten clamping screw 2 and side fastening bolt 4, guarantee, between clamp 1 and rock sample 9, the slippage in any direction not to occur;
5, clamp 1 is fixed on the bearing of processing table top, rock sample 9 is holed in technique through hole 5 positions of upper clamp by the boring apparatus with diamond head;
6, the fret-saw with emery is entered by the technique through hole 5 of upper clamp, through corresponding hole on rock sample 9, after the technique through hole 5 of lower clamp is drawn, be locked on saw bow again, then pull back and forth fret-saw along pilot hole 6, saw out the crack of predetermined length and angle at rock sample 9.
The true three axle rock sample crackle fabricated device of the utility model, it is simple in structure, processes very convenient.This device is fastened on rock sample 9 on clamp 1 by clamping screw 2, set nut 3 and side fastening bolt 4, the precrack on rock sample 9 by technique through hole 5 reserved on clamp 1 outside of belly and pilot hole 6.Add man-hour, clamp 1 can be processed into different outside of belly size (width X and length Y) by testing requirements, to meet the demand of different rock sample sizes; Pilot hole 6 on clamp 1 can be processed into diverse location, angle (fracture dip α and rock bridge inclination angle by testing requirements
β) and length (fracture length a and rock bridge length overlap joint type b), to meet the making requirement of the prefabricated scheme of the different crackles of true three axle rock samples.
Claims (4)
1. true three axle rock sample crackle fabricated device, is characterized in that: comprise two clamps (1), clamping screw (2), set nut (3) and side fastening bolt (4); Every clamp (1) middle part is spill channel-section steel shape, and openend both sides are respectively equipped with wing plate, and the involutory middle part of two clamps (1) is square tube type; On the wing plate of every clamp (1) both sides, be respectively equipped with two pairs of pilot holes (7) with Central Symmetry; Described clamp (1) middle part is respectively equipped with two double thread holes (8) on two sides; The outside of belly at every clamp (1) middle part is rectangle, and the width of the outside of belly is made as X, and length is made as Y; On the described outside of belly, be laid with one or more the hole, prefabricated crack that connects the outside of belly, hole, prefabricated crack is made up of technique through hole (5) and pilot hole (6), pilot hole (6) is bar hole, technique through hole (5) is positioned at the center of pilot hole (6), and the angle on center line along its length of pilot hole (6) and the outside of belly between width directions X is fracture dip
α; The aperture of technique through hole (5) is d; The strip width of pilot hole (6) is h, and length is a; Article two, in hole, above prefabricated crack, between hole, contiguous prefabricated crack, 2 nearest distances are rock bridge length b; Between hole, contiguous prefabricated crack, on nearest 2 lines and the outside of belly, the angle between width directions X is rock bridge inclination angle
β; The involutory recess of described two clamps (1) is relatively setting up and down, be arranged on top for upper clamp, below be lower clamp, upper clamp and lower clamp are left and right symmetrical part; Hole, prefabricated crack uniform on the upper clamp outside of belly is corresponding up and down by pilot hole (7) with hole, prefabricated crack uniform on the lower clamp outside of belly, and is fixed together by clamping screw (2) and set nut (3); Described side fastening bolt (4) is threaded in respectively in the threaded hole (8) of the left and right sides of upper and lower clamp.
2. the true three axle rock sample crackle fabricated device of one according to claim 1, is characterized in that: the position relationship in hole, plural prefabricated crack is by rock bridge length b and rock bridge inclination angle
βdetermine.
3. the true three axle rock sample crackle fabricated device of one according to claim 1, is characterized in that: on the described outside of belly, be laid with the hole, three prefabricated cracks that connects the outside of belly; The fracture dip in described first, second and third hole, prefabricated crack is respectively
α 1,
α 2,
α 3; The rock bridge length in described the first hole, prefabricated crack and the second hole, prefabricated crack is b
1, and rock bridge inclination angle is
β 1; Described the first hole, prefabricated crack and the 3rd hole, prefabricated crack rock bridge length are b
2, and rock bridge inclination angle is
β 2.
4. the true three axle rock sample crackle fabricated device of one according to claim 1, is characterized in that: described fracture dip
αfor acute angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420026702.2U CN203705236U (en) | 2014-01-16 | 2014-01-16 | True triaxial rock sample crack prefabricating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420026702.2U CN203705236U (en) | 2014-01-16 | 2014-01-16 | True triaxial rock sample crack prefabricating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203705236U true CN203705236U (en) | 2014-07-09 |
Family
ID=51055657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420026702.2U Withdrawn - After Issue CN203705236U (en) | 2014-01-16 | 2014-01-16 | True triaxial rock sample crack prefabricating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203705236U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776673A (en) * | 2014-01-16 | 2014-05-07 | 合肥工业大学 | True-triaxial rock sample crack prefabricating device |
| CN104535386A (en) * | 2014-12-16 | 2015-04-22 | 中国航空工业集团公司北京航空材料研究院 | Crack prefabricating device of non-metal material fracture toughness test |
| CN105277406A (en) * | 2015-11-03 | 2016-01-27 | 中国建筑股份有限公司 | Mold for producing cracked rock test piece of different dip angles and production method thereof |
| CN105527135A (en) * | 2014-10-23 | 2016-04-27 | 朱栗宝 | Apparatus for making pre-cracked sample for material mechanical properties test |
| CN105784456A (en) * | 2016-03-04 | 2016-07-20 | 中国石油大学(华东) | Mold for manufacturing random cross-through fractured rock matrix |
| CN105806686A (en) * | 2016-03-04 | 2016-07-27 | 中国石油大学(华东) | Mold for manufacturing anchored randomized crossover through crack rock mass |
| CN107503724A (en) * | 2017-07-03 | 2017-12-22 | 中国石油大学(北京) | Preset the physical simulation experiment device and its method of the intrinsic fracture of medium |
-
2014
- 2014-01-16 CN CN201420026702.2U patent/CN203705236U/en not_active Withdrawn - After Issue
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776673A (en) * | 2014-01-16 | 2014-05-07 | 合肥工业大学 | True-triaxial rock sample crack prefabricating device |
| CN105527135A (en) * | 2014-10-23 | 2016-04-27 | 朱栗宝 | Apparatus for making pre-cracked sample for material mechanical properties test |
| 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 |
| CN104535386A (en) * | 2014-12-16 | 2015-04-22 | 中国航空工业集团公司北京航空材料研究院 | Crack prefabricating device of non-metal material fracture toughness test |
| CN105277406A (en) * | 2015-11-03 | 2016-01-27 | 中国建筑股份有限公司 | Mold for producing cracked rock test piece of different dip angles and production method thereof |
| CN105277406B (en) * | 2015-11-03 | 2017-12-05 | 中国建筑股份有限公司 | Mould for making different angle class fissure rock test specimen and preparation method thereof |
| CN105784456A (en) * | 2016-03-04 | 2016-07-20 | 中国石油大学(华东) | Mold for manufacturing random cross-through fractured rock matrix |
| CN105806686A (en) * | 2016-03-04 | 2016-07-27 | 中国石油大学(华东) | Mold for manufacturing anchored randomized crossover through crack rock mass |
| CN107503724A (en) * | 2017-07-03 | 2017-12-22 | 中国石油大学(北京) | Preset the physical simulation experiment device and its method of the intrinsic fracture of medium |
| CN107503724B (en) * | 2017-07-03 | 2019-07-23 | 中国石油大学(北京) | Preset the physical simulation experiment device and its method of the intrinsic fracture of medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140709 Effective date of abandoning: 20151007 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |