CN-121977908-A - Method and device for manufacturing controllable crack test piece

CN121977908ACN 121977908 ACN121977908 ACN 121977908ACN-121977908-A

Abstract

The application relates to the technical field of geological research devices, in particular to a controllable crack test piece manufacturing device which comprises a crack generation structure, a mold generation structure and a mold, wherein the crack generation structure comprises a shell, an extrusion structure, a fixing structure and a crack test piece, the extrusion structure is used for extruding and deforming the crack test piece, the fixing structure is used for fixing the crack test piece, the mold generation structure comprises a mold shell used for generating a solidified material crack mold, a cavity is formed in the mold shell, and solidified material is poured in the cavity, so that the problems of single crack model, complex preparation process and poor repeatability in the prior art are solved.

Inventors

ZUO SHAOJIE
CHEN HE
MA ZHENQIAN
KANG XIANGTAO
PAN CHAO
Yi Hanhua
HE JIANGQI
LIANG FENG

Assignees

贵州大学

Dates

Publication Date: 20260505
Application Date: 20260312

Claims (10)

1. The utility model provides a controllable crack test piece manufacturing installation which characterized in that includes: The crack generation structure comprises a shell (1), an extrusion structure, a fixing structure and a crack test piece (7), wherein the extrusion structure is used for extruding and deforming the crack test piece (7), and the fixing structure is used for fixing the crack test piece (7); the mold generating structure is used for generating a crack mold of the curing material and comprises a mold shell (8), wherein a cavity is formed in the mold shell (8), and the curing material is poured in the cavity.
2. The controllable crack test piece manufacturing device according to claim 1, wherein the extrusion structure comprises a transverse extrusion structure (2) and a vertical extrusion structure (3), the transverse extrusion structure (2) is located on one side inside the shell (1), a fixed extrusion plate (4) is arranged on one side, opposite to the transverse extrusion structure (2), inside the shell (1), an extrusion end portion of the transverse extrusion structure (2) is provided with the transverse extrusion plate (21), and an extrusion end of the vertical extrusion structure (3) is provided with the vertical extrusion plate (31).
3. The controllable crack test piece manufacturing device according to claim 2, wherein a lateral extrusion plate (21) is provided with a lateral sliding clamping plate (22) on one side deviating from the lateral extrusion structure (2), the lateral sliding clamping plate (22) is provided with two, and the lateral sliding chute (23) is arranged on one side deviating from the lateral extrusion structure (2) of the lateral extrusion plate (21), the lateral sliding clamping plate (22) can slide along the lateral sliding chute (23), a lateral oblique sliding chute (24) is arranged on the lower surface inside the shell (1), the lateral sliding clamping plate (22) is connected with a lateral oblique sliding block (25), the lateral oblique sliding block (25) is in sliding connection with the lateral oblique sliding chute (24), and when the telescopic rod of the lateral extrusion structure (2) stretches out, the two lateral sliding clamping plates (22) are close to each other.
4. The controllable crack test piece manufacturing device according to claim 3, wherein the vertical extrusion plate (31) is provided with a vertical moving clamping plate (32) on one side deviating from the vertical extrusion structure (3), the vertical moving clamping plate (32) is provided with two, and the vertical moving sliding groove (33) is formed on one side deviating from the vertical extrusion structure (3) of the vertical extrusion plate (31), the vertical moving clamping plate (32) can slide along the vertical moving sliding groove (33), a vertical inclined sliding groove (34) is formed in the surface of the vertical extrusion plate (31), the vertical moving clamping plate (32) is connected with a vertical inclined sliding block (35), the vertical inclined sliding block (35) is slidingly connected in the vertical inclined sliding groove (34), and when the telescopic rod of the vertical extrusion structure (3) stretches out, the two vertical moving clamping plates (32) are close to each other.
5. The controllable crack test piece manufacturing device according to claim 2, wherein the fixing structure comprises two transverse fixing plates (6) and two vertical fixing plates (5), the two transverse fixing plates (6) are slidably connected to the lower surface inside the shell (1), the two transverse fixing plates (6) are used for clamping the right side of the crack test piece, the two vertical fixing plates (5) are arranged, the two vertical fixing plates (5) are slidably connected to the surface of the fixed extrusion plate (4), and the vertical fixing plates (5) are used for clamping the lower side of the crack test piece (7).
6. The controllable crack test piece manufacturing device according to claim 5, wherein a first gear (51) is rotatably connected to the lower surface of the shell (1), a first rack (52) is meshed with the first gear (51), the first rack (52) is fixedly connected with the transverse extrusion plate (21), a vertical gear rod is fixedly connected with the first gear (51), a second gear (53) is fixedly connected with the vertical gear rod, a second rack (54) is meshed with the second gear (53), the second rack (54) is fixedly connected with the vertical fixing plate (5), and when the transverse extrusion structure (2) is extruded, the two vertical fixing plates (5) are mutually far away.
7. The controllable crack test piece manufacturing device according to claim 6, wherein a third gear (61) is rotatably connected to the surface of the fixed extrusion plate (4), a third rack (62) is meshed with the third gear (61), the third rack (62) is fixedly connected with the vertical extrusion plate (31), a transverse gear rod is fixedly connected with the third gear (61), a fourth gear (63) is fixedly connected with the transverse gear rod, a fourth rack (64) is meshed with the fourth gear (63), the fourth rack (64) is fixedly connected with the transverse fixing plate (6), and when the vertical extrusion structure (3) is extruded, the two transverse fixing plates (6) are mutually far away.
8. The device for manufacturing the controllable crack specimen (7) according to claim 1, wherein the raw materials of the crack specimen (7) comprise polymethyl ene, calcium carbonate powder and a toughening agent.
9. A method of manufacturing a controllable crack specimen manufacturing device as claimed in any one of claims 1 to 8, comprising the steps of: S1, manufacturing a crack test piece (7), and fixing the crack test piece (7) in a shell (1) through a fixing structure; S2, setting a crack generation structure, and extruding a crack test piece (7) by using an extrusion structure; s3, placing the extruded crack test piece (7) into a die shell (8), injecting a curing material into the die shell (8) for reverse molding, and air-drying the curing material to form a curing material model; S4, comparing the geometric form parameters and the two dimensions of the fracture grid characteristics of the fracture test piece (7) with those of the real rock stratum, and judging whether the test piece can restore the real rock stratum.
10. The method for manufacturing a controllable crack specimen manufacturing device according to claim 9, wherein the extrusion parameters in S2 satisfy the following formula: Δh±5%=0.4802-0.0921×x+0.1538×y+0.0199×z; A/ω±5%=0.0549-0.0090×x+0.0202×y+0.0021×z; wherein Δh is the fluctuation difference of the required crack, A/ω is the aspect ratio of the required crack, x is the lateral extrusion distance, y is the vertical extrusion distance, and z is the extrusion times.

Description

Method and device for manufacturing controllable crack test piece Technical Field The application relates to the technical field of geological research devices, in particular to a method and a device for manufacturing a controllable crack test piece. Background In the field of energy exploitation of petroleum, natural gas, geothermal energy and the like, the diversion capability of a reservoir rock fracture is a key factor for determining the fluid seepage efficiency. At present, a diversion instrument is often adopted in a laboratory to test the diversion capability of an artificial crack. The prior art has obvious defects that 1. The crack simulation is single, the existing method is used for manufacturing cracks by sawing on a rock core or using a smooth plate, and the crack forms are too ideal (flat and smooth) and cannot truly simulate the complex, tortuous and rough natural crack forms in the underground rock stratum. 2. The repeatability and controllability are poor, although some experiments try to manufacture rough cracks through acid etching or engraving, the process is complex, the cost is high, and the geometric parameters (such as tortuosity and roughness) of the cracks are difficult to precisely control, so that the experimental results are poor in repeatability, and different researches are difficult to compare. Disclosure of Invention In order to solve the problem that the crack model is single, the preparation process is complicated and repeatability is poor in prior art, provide a controllable crack test piece manufacturing device, include: The crack generation structure comprises a shell, an extrusion structure, a fixing structure and a crack test piece, wherein the extrusion structure is used for extrusion deformation of the crack test piece, and the fixing structure is used for fixing the crack test piece; The mold generating structure is used for generating a crack mold of the curing material and comprises a mold shell, wherein a cavity is formed in the mold shell, and the cavity is used for pouring the curing material. Through above-mentioned technical scheme, fixed knot constructs and fixes the crack test piece, carries out controllable deformation to the crack test piece through the extrusion structure afterwards, makes the crack test piece form required crack, and cooperation mould generates the quick repeated crack form of structure, solves traditional crack simulation singleness, the complex problem of technology. The position of the crack test piece is stable in the pouring process of the solidified material, the crack form deviation is avoided, the repeatability and the accuracy of the test piece preparation are greatly improved, and a crack model attached to a real rock stratum is provided for the subsequent diversion capability test. Optionally, the extrusion structure includes horizontal extrusion structure and vertical extrusion structure, and horizontal extrusion structure is located inside one side of casing, and the casing is provided with fixed extrusion board with horizontal extrusion structure relative one side, and horizontal extrusion structure's extrusion tip is provided with horizontal extrusion board, and vertical extrusion structure extrusion end is provided with vertical extrusion board. Through the technical scheme, the transverse extrusion structure and the vertical extrusion structure are cooperated, the crack test piece can be extruded from two directions, the multi-directional crack form formed by the underground stratum under the action of complex stress can be simulated, compared with single-direction extrusion, the crack simulation is closer to the actual condition, and the defect that the traditional device simulates a single is overcome. Optionally, lateral extrusion board deviates from lateral extrusion structure one side and is provided with sideslip splint, and the sideslip splint is provided with two, and lateral extrusion board deviates from lateral extrusion structure one side and has seted up the sideslip spout, and the sideslip splint can follow the sideslip spout and slide, has seted up the sideslip spout at the inside lower surface of casing, and sideslip splint are connected with the sideslip slider, and sideslip slider sliding connection is in the sideslip spout, and when the telescopic link of lateral extrusion structure stretches out, two sideslip splint are close to each other. If directly extrude the crack test piece, the crack test piece is probably breaking away from the horizontal stripper plate at extruded in-process, leads to producing the crack error too big, through above-mentioned technical scheme, when horizontal extrusion structure extrudeed the crack test piece, the horizontal stripper plate is close to the crack test piece, and the horizontal oblique slider slides in horizontal oblique spout simultaneously, makes two sideslip splint be close to the crack test piece more the distance between the smaller, until two last sides