CN111157422A - Device capable of quantitatively adjusting rock rough fracture opening and using method thereof - Google Patents

Device capable of quantitatively adjusting rock rough fracture opening and using method thereof Download PDF

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Publication number
CN111157422A
CN111157422A CN201911396537.3A CN201911396537A CN111157422A CN 111157422 A CN111157422 A CN 111157422A CN 201911396537 A CN201911396537 A CN 201911396537A CN 111157422 A CN111157422 A CN 111157422A
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China
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plate
clamping
fracture
sample
adjusting
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CN201911396537.3A
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CN111157422B (en
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朱寅斌
李长冬
周佳庆
张永权
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China University of Geosciences
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China University of Geosciences
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/08Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/0806Details, e.g. sample holders, mounting samples for testing

Abstract

The invention provides a device capable of quantitatively adjusting the opening degree of a rough rock fracture and a using method thereof, and the device comprises a bottom plate, a first clamping device and a second clamping device, wherein two sides of the bottom plate are respectively provided with a vertical plate; the second clamping device comprises two stand columns, a pressure-bearing top plate, a precise electric lifting platform and two clamps, the two stand columns are fixed on the bottom plate, the pressure-bearing top plate is movably connected with the two stand columns, the precise electric lifting platform is installed on the platform support, portal frames are arranged on two sides of the precise electric lifting platform, and the two clamps are installed at the lower ends of the two portal frames respectively. The invention has the beneficial effects that: according to the invention, the first clamping device and the second clamping device are used for clamping the lower fracture sample tray and the upper fracture sample tray respectively, and the precise electric lifting platform is used for carrying out high-precision quantitative control lifting, so that the synchronous and uniform increase of the fracture opening is ensured, and the desired fracture opening can be obtained through rapid adjustment.

Description

Device capable of quantitatively adjusting rock rough fracture opening and using method thereof
Technical Field
The invention relates to the technical field of geothermal exploitation, in particular to a device capable of quantitatively adjusting rock rough fracture opening and a using method thereof.
Background
In many industrial and scientific research fields, the characteristics of fluid flow in fractured rock have been of great interest, such as development and management of groundwater resources, deep oil and gas exploitation, nuclear waste treatment and sequestration, and pollutant transport. The single fracture seepage is the basis for researching discrete fracture network seepage, and the parameter of the average fracture opening degree has important influence on the fluid flow characteristics in rock fractures, so that the research on the fluid flow characteristics under the condition of single fracture opening degree has important significance for improving the oil and gas exploitation efficiency, the nuclear waste material sealing storage amount, the underground pollutant treatment and the research on the rock fracture seepage under complex conditions. How to conveniently and accurately change the average opening of the fracture and adjust the average opening at any time according to the desired opening result is not deeply researched at present.
In the disclosed technology, a high-temperature fracture seepage simulation device (application number 201711423221.X) capable of changing the fracture opening degree is used for uniformly placing ceramic support balls in the fractures among rock blocks and the fractures between the fractures; a rough crack with variable opening degree for a visual experiment and a manufacturing method thereof (application No. 201910238486.5) change the average opening degree of the crack by placing rigid gaskets with different thicknesses between water stop baffles at two sides of an upper disc and a lower disc of the crack. Although the two methods can change the opening degree of the fracture, the two methods have the defects that the same distance cannot be increased at each position of the upper and lower disks of the fracture, any desired fracture opening degree cannot be obtained through convenient adjustment, and the like, and are difficult to apply in experimental design.
Disclosure of Invention
In view of this, the embodiment of the present invention provides a device capable of quantitatively adjusting rock rough fracture opening and a method for using the same.
The embodiment of the invention provides a device capable of quantitatively adjusting the opening degree of a rough rock fracture, which comprises a bottom plate, a first clamping device and a second clamping device, wherein the first clamping device and the second clamping device are positioned above the bottom plate; the second clamping device comprises two stand columns, a pressure-bearing top plate, a precise electric lifting platform and two clamps, wherein the stand columns are vertically fixed above the bottom plate, the pressure-bearing top plate is rectangular and can be movably connected with the two stand columns in the middle, a plurality of second bubble level meters are arranged on the upper surface of the pressure-bearing top plate, a platform support is arranged above the pressure-bearing top plate, the precise electric lifting platform is arranged on the platform support, portal frames are symmetrically arranged on the left side and the right side of the precise electric lifting platform, the two clamps are respectively arranged at the lower ends of the portal frames, the first clamping device is used for clamping a crack sample lower plate, the second clamping device is used for clamping a crack sample upper plate, and the second clamping device is used for regulating the crack opening degree of the rock crack sample by lifting the precise electric lifting platform.
Furthermore, the bottom plate is provided with a guide rail, and the rectangular clamp holder is movably embedded above the guide rail through a limiting clamp piece.
Furthermore, the other ends of the two lead screws are connected with rotating hand wheels, and the rotating hand wheels are used for driving the lead screws to drive the rectangular clamping device to move leftwards or rightwards in the guide rail.
Furthermore, four corners of the bottom plate are respectively provided with an adjusting bolt, and the adjusting bolts are used for leveling the bottom plate.
Furthermore, the middle parts of the two stand columns are provided with external threads, and the pressure-bearing top plate is movably connected to the external threads of the two stand columns through nuts.
Furthermore, round holes are formed in the front end and the rear end of the pressure-bearing top plate, and the two round holes are in clearance fit with the two upright columns.
Furthermore, each anchor clamps all include inside be equipped with the outsourcing steel trough of dovetail slide rail and can follow the gliding L shape locating part of dovetail slide rail, outsourcing steel trough with L shape locating part passes through bolt or screw and can dismantle the connection in the portal frame lower extreme.
The invention also provides a use method of the device capable of quantitatively adjusting the rock rough fracture opening degree, which comprises the following steps:
s1, preparing the rock fracture sample comprising the fracture sample lower disc and the fracture sample upper disc, and arranging four grooves for the clamp to clamp on the fracture sample upper disc;
s2, adjusting the adjusting bolts at corresponding positions according to the bubble conditions in the first bubble levels, and leveling the bottom plate;
s3, placing the fractured sample on the bottom plate, and adjusting the positions of the two rectangular clamps in the guide rail by rotating the rotating hand wheel so that the two clamps are in close contact with the left end and the right end of the fractured sample lower disc to firmly fix the fractured sample lower disc at the center of the bottom plate;
s4, sleeving the pressure bearing top plate to the external threads of the two upright posts, pre-fixing by using the nuts, mounting the platform support on the pressure bearing top plate, mounting the precise electric lifting platform on the platform support, and mounting two portal frames at the front end and the rear end of the precise electric lifting platform respectively;
s5, clamping the crack sample upper disc at the groove position through the two clamps, adjusting the two portal frames to the two clamps, connecting the two clamps with the two portal frames respectively, adjusting the nuts on the two upright columns according to the second bubble level meters, and adjusting the pressure-bearing top plate to be horizontal;
and S6, controlling the distance between the lower disk of the fracture sample and the upper disk of the fracture sample through the precision electric lifting platform so as to quantitatively adjust the fracture opening of the rock fracture sample.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: according to the device capable of quantitatively adjusting the rock rough fracture opening degree, the first clamping device and the second clamping device are used for clamping the fracture sample lower disc and the fracture sample upper disc respectively, and the distance between the fracture sample upper disc and the fracture sample lower disc is quantitatively controlled in a high-precision mode through the precision electric lifting platform, so that the rock fracture sample can be synchronously and uniformly increased in fracture opening degree, and meanwhile, any desired fracture opening degree can be rapidly adjusted; the method has the advantages of simple operation, wide application range and high precision, and not only has accurate and reliable result when the average opening degree of the fracture is adjusted, but also can conveniently change the opening degree of the fracture quantitatively.
Drawings
Fig. 1 is a front view of the device for quantitatively adjusting the rock rough fracture opening degree.
Fig. 2 is a left side view of the device for quantitatively adjusting the rock rough fracture opening degree.
Fig. 3 is a top view of the device for quantitatively adjusting the rock rough fracture opening degree.
Fig. 4 is a schematic structural view of the jig 34 in fig. 1.
In the figure: 1-a bottom plate, 11-a vertical plate, 12-a first bubble level meter, 13-a limiting clamping piece, 14-an adjusting bolt, 2-a first clamping device, 21-a rectangular clamp, 22-a lead screw, 23-a rotating hand wheel, 3-a second clamping device, 31-an upright post, 31 a-external threads, 31 b-a nut, 32-a pressure-bearing top plate, 33-a precise electric lifting platform, 34-a clamp, 34 a-an outer steel wrapping groove, 34 b-an L-shaped limiting piece, 35-a second bubble level meter, 36-a platform support, 37-a portal frame, 4-a rock crack sample, 41-a crack sample lower disc and 42-a crack sample upper disc.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, 2 and 3, an embodiment of the present invention provides a device capable of quantitatively adjusting the opening of rock rough fractures, which includes a bottom plate 1, and a first clamping device 2 and a second clamping device 3 located above the bottom plate 1.
The left side and the right side of the bottom plate 1 are respectively provided with a vertical plate 11, the upper surface of the bottom plate 1 is provided with a plurality of first bubble levels 12, meanwhile, four corners of the bottom plate 1 are respectively provided with an adjusting bolt 14, the adjusting bolts 14 are used for leveling the bottom plate 1, in the embodiment, the bottom plate 1 is provided with guide rails (not shown in the attached drawing) in the horizontal direction, and the two guide rails are on the same straight line.
The first clamping device 2 comprises two rectangular clamping devices 21 and two lead screws 22 which are bilaterally symmetrical, one end of each lead screw 22 is connected with one rectangular clamping device 21, the other end of the screw rod 22 is movably connected with and penetrates through the vertical plate 11 on the corresponding side, the other ends of the screw rods 22 are both connected with rotating hand wheels 23, the two rotating hand wheels 23 are respectively positioned at the outer sides of the two vertical plates 11, in the embodiment, both vertical plates 11 are provided with threaded holes, both screw rods 22 are in threaded connection with the two vertical plates 11 through the threaded holes, the rectangular clamp 21 can be movably embedded above the guide rail through a limit fastener 13, the limit fastener 13 is used for always limiting the rectangular clamp 21 in the guide rail, the rotating hand wheel 23 drives the lead screw 22 to drive the rectangular clamp holder 21 to move leftwards or rightwards in the guide rail, and the first clamping device 2 is used for clamping a crack sample lower disc 41.
The second clamping device 3 comprises two upright columns 31, a pressure-bearing top plate 32, a precise electric lifting platform 33 and two clamps 34, wherein the two upright columns 31 are vertically fixed above the bottom plate 1, the bottoms of the two upright columns 31 are fixed on the symmetry line of the two lead screws 22 in the embodiment, the pressure-bearing top plate 32 is rectangular and can be movably connected to the middle parts of the two upright columns 31, specifically, round holes (not shown in the drawing) are respectively formed at the front end and the rear end of the pressure-bearing top plate 32, the two round holes are in clearance fit with the two upright columns 31, external threads 31a are respectively formed in the middle parts of the two upright columns 31, the pressure-bearing top plate 32 can be movably connected to the external threads 31a of the two upright columns 31 through nuts 31b, a plurality of second bubble levels 35 are arranged on the upper surface of the pressure-bearing top plate 32, a platform support 36 is arranged above the pressure-bearing top plate 32, and, the portal frames 37 are symmetrically arranged on the left side and the right side of the precision electric lifting platform 33 to ensure that the upper fracture sample tray 42 can be integrally and uniformly lifted in the lifting process, the stroke of the precision electric lifting platform 33 in this embodiment is 6mm, the precision is 0.5 μm, and the distance between the lower fracture sample tray 41 and the upper fracture sample tray 42 can be precisely adjusted through the precision electric lifting platform 33, so that the average opening degree of the fractures can be adjusted according to actual test requirements.
Referring to fig. 2 and 4, the two fixtures 34 are respectively installed at the lower ends of the two portal frames 37, each fixture 34 includes an outer steel casing 34a having a dovetail groove slide rail therein and an L-shaped limiting member 34b capable of sliding along the dovetail groove slide rail, the outer steel casing 34a and the L-shaped limiting member 34b are detachably connected to the lower end of the portal frame 37 through bolts or screws, and the second clamping device 3 clamps the upper fracture sample disc 42 through the two fixtures 34 in a matching manner, and lifts and lowers the upper fracture sample disc 42 through the precision electric lifting platform 33, so as to adjust the fracture opening of the rock fracture sample 4.
The invention also provides a use method of the device capable of quantitatively adjusting the rock rough fracture opening degree, which comprises the following steps:
s1, preparing the rock fracture sample 4 including the fracture sample lower disc 41 and the fracture sample upper disc 42, wherein a fracture is formed between the fracture sample lower disc 41 and the fracture sample upper disc 42, four grooves (not shown in the drawing) for being clamped by the clamp 34 are formed in the fracture sample upper disc 42, the rock fracture sample 4 may be a cylinder, a cuboid, a cube, or the like, and in this embodiment, the rock fracture sample 4 is a cuboid;
s2, adjusting the adjusting bolts 14 at corresponding positions according to the bubble condition in each first bubble level meter 12, and leveling the bottom plate 1;
s3, placing the fractured sample 4 on the bottom plate 1, and adjusting the positions of the two rectangular holders 21 in the guide rails by rotating the rotating handwheel 23, so that the two holders 21 are in close contact with the left and right ends of the fractured sample lower plate 41, so as to firmly fix the fractured sample lower plate 41 at the center of the bottom plate 1;
s4, sleeving the pressure-bearing top plate 32 to the external threads 31a of the two upright columns 31, pre-fixing by using nuts 31b, installing the platform support 36 on the pressure-bearing top plate 32, installing the precision electric lifting platform 33 on the platform support 36, and installing the two portal frames 37 at the front end and the rear end of the precision electric lifting platform 33 respectively;
s5, clamping the upper fracture sample disc 42 at the groove by the two clamps 34, adjusting the two portal frames 37 to the two clamps 34, connecting the two clamps 34 with the two portal frames 37, adjusting the nuts 31b on the two upright columns 31 according to the second bubble level meter 35, adjusting the pressure-bearing top plate 32 to be horizontal, and after the pressure-bearing top plate 32 is adjusted to be horizontal, screwing the nuts 31b respectively to firmly fix the pressure-bearing top plate 32 on the two upright columns 31, wherein in addition, in the process, the lower fracture sample disc 41 and the upper fracture sample disc 42 are required to be tightly attached;
and S6, controlling the distance between the fracture sample lower disc 41 and the fracture sample upper disc 42 through the precision electric lifting platform 33, so as to quantitatively adjust the fracture opening of the rock fracture sample 4.
According to the device capable of quantitatively adjusting the rock rough fracture opening degree, the first clamping device 2 and the second clamping device 3 are used for clamping the fracture sample lower disc 41 and the fracture sample upper disc 42 respectively, and the distance between the fracture sample upper disc 42 and the fracture sample lower disc 41 is quantitatively controlled in a high-precision mode through the precision electric lifting platform 33, so that the rock fracture sample 4 can be synchronously and uniformly increased in fracture opening degree, and any desired fracture opening degree can be rapidly adjusted; in addition, the method has the advantages of simple operation, wide application range and high precision, and not only is the result accurate and reliable when the average opening degree of the fracture is adjusted, but also the opening degree of the fracture can be conveniently and quantitatively changed.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (8)

1. The utility model provides a device that can quantitative adjustment rock coarse crack aperture which characterized in that: the device comprises a bottom plate, a first clamping device and a second clamping device, wherein the first clamping device and the second clamping device are positioned above the bottom plate, vertical plates are respectively arranged on the left side and the right side of the bottom plate, a plurality of first bubble levels are arranged on the upper surface of the bottom plate, the first clamping device comprises two rectangular clamping devices and two lead screws which are bilaterally symmetrical, one end of each lead screw is connected with one rectangular clamping device, and the other end of each lead screw is movably connected with and penetrates through the vertical plate on the corresponding side; the second clamping device comprises two stand columns, a pressure-bearing top plate, a precise electric lifting platform and two clamps, wherein the stand columns are vertically fixed above the bottom plate, the pressure-bearing top plate is rectangular and can be movably connected with the two stand columns in the middle, a plurality of second bubble level meters are arranged on the upper surface of the pressure-bearing top plate, a platform support is arranged above the pressure-bearing top plate, the precise electric lifting platform is arranged on the platform support, portal frames are symmetrically arranged on the left side and the right side of the precise electric lifting platform, the two clamps are respectively arranged at the lower ends of the portal frames, the first clamping device is used for clamping a crack sample lower plate, the second clamping device is used for clamping a crack sample upper plate, and the second clamping device is used for regulating the crack opening degree of the rock crack sample by lifting the precise electric lifting platform.
2. The device for quantitatively adjusting the opening degree of the rough rock fractures as claimed in claim 1, wherein: the bottom plate is provided with a guide rail, and the rectangular clamp holder is movably embedded above the guide rail through a limiting clamp piece.
3. The device for quantitatively adjusting the opening degree of the rough rock fractures as claimed in claim 2, wherein: the other ends of the two lead screws are connected with rotating hand wheels, and the rotating hand wheels are used for driving the lead screws to drive the rectangular clamping device to move leftwards or rightwards in the guide rail.
4. The device for quantitatively adjusting the opening degree of the rock rough fractures as claimed in claim 3, wherein: four corners of the bottom plate are respectively provided with an adjusting bolt, and the adjusting bolts are used for leveling the bottom plate.
5. The device for quantitatively adjusting the opening degree of the rough rock fractures as claimed in claim 4, wherein: the middle parts of the two upright posts are provided with external threads, and the pressure-bearing top plate is movably connected to the external threads of the two upright posts through nuts.
6. The device for quantitatively adjusting the opening degree of the rough rock fractures as set forth in claim 5, wherein: round holes are formed in the front end and the rear end of the pressure-bearing top plate, and the round holes are in clearance fit with the two upright columns.
7. The device for quantitatively adjusting the opening degree of the rough rock fractures as set forth in claim 5, wherein: each anchor clamps all include inside be equipped with the outsourcing steel trough of dovetail slide rail and can follow the gliding L shape locating part of dovetail slide rail, outsourcing steel trough with L shape locating part passes through bolt or screw can dismantle the connection in the portal frame lower extreme.
8. The use method of the device for quantitatively adjusting the rock rough fracture opening degree according to any one of claims 5 to 7 is characterized by comprising the following steps:
s1, preparing the rock fracture sample comprising the fracture sample lower disc and the fracture sample upper disc, and arranging four grooves for the clamp to clamp on the fracture sample upper disc;
s2, adjusting the adjusting bolts at corresponding positions according to the bubble conditions in the first bubble levels, and leveling the bottom plate;
s3, placing the fractured sample on the bottom plate, and adjusting the positions of the two rectangular clamps in the guide rail by rotating the rotating hand wheel so that the two clamps are in close contact with the left end and the right end of the fractured sample lower disc to firmly fix the fractured sample lower disc at the center of the bottom plate;
s4, sleeving the pressure bearing top plate to the external threads of the two upright posts, pre-fixing by using the nuts, mounting the platform support on the pressure bearing top plate, mounting the precise electric lifting platform on the platform support, and mounting two portal frames at the front end and the rear end of the precise electric lifting platform respectively;
s5, clamping the crack sample upper disc at the groove position through the two clamps, adjusting the two portal frames to the two clamps, connecting the two clamps with the two portal frames respectively, adjusting the nuts on the two upright columns according to the second bubble level meters, and adjusting the pressure-bearing top plate to be horizontal;
and S6, controlling the distance between the lower disk of the fracture sample and the upper disk of the fracture sample through the precision electric lifting platform so as to quantitatively adjust the fracture opening of the rock fracture sample.
CN201911396537.3A 2019-12-30 2019-12-30 Device capable of quantitatively adjusting rock rough fracture opening and using method thereof Active CN111157422B (en)

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