CN209858563U - Device for reducing end friction effect in rock fracture shear seepage experiment - Google Patents
Device for reducing end friction effect in rock fracture shear seepage experiment Download PDFInfo
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- CN209858563U CN209858563U CN201920392888.6U CN201920392888U CN209858563U CN 209858563 U CN209858563 U CN 209858563U CN 201920392888 U CN201920392888 U CN 201920392888U CN 209858563 U CN209858563 U CN 209858563U
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Abstract
The utility model belongs to the technical field of rock mechanics, a device of tip friction effect in reducing rock fracture shearing seepage flow experiment is provided, including shearing mechanism, the seepage flow device that control fluid flows, the device and the sealing device that reduce friction that are used for shearing the fracture rock sample. The utility model discloses a device has increased the device of friction reduction except that the seepage flow device that is used for shearing the shearing mechanism of crack rock sample and control fluid flow, shearing mechanism includes normal direction increased pressure plate, base, goes up cushion and cushion down. The fractured rock sample is placed between an upper cushion block and a lower cushion block, the upper cushion block is connected with the normal pressurizing plate, and the lower cushion block is connected with the base. The friction reducing device comprises a device for reducing upper friction between the upper cushion block and the sample and a device for reducing lower friction between the lower cushion block and the sample. The utility model discloses a device utilizes the better antifriction effect of special fluorine dragon material, has reduced the effect of the friction force between cushion and the sample effectively.
Description
Technical Field
The utility model belongs to the technical field of rock mechanics, especially, relate to an effectively reduce tip friction device in rock fracture shearing seepage flow experiment.
Background
The shear-seepage characteristic of the rock fracture has important significance in the research of major geological disasters and the research of large rock mass engineering. The experimental research about the rock fracture shearing-seepage characteristics carried out in a laboratory can help us to deeply understand the change of the fracture under the action of hydraulic coupling and the mechanical state of seepage fluid, and provides theoretical support for practical engineering application.
Many current experimental studies on the shear-seepage characteristics of rock fractures are available, with the problem of end-on friction being ignored by researchers. The main reason is that the measurement precision of the traditional mode experimental equipment is limited, and the nonuniformity of the internal stress distribution of the test piece caused by end friction is not considered.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of above-mentioned prior art, the utility model provides an effectively reduce tip friction device in rock fracture shearing seepage flow experiment.
The technical scheme of the utility model:
a device for reducing end friction effect in a rock fracture shearing seepage experiment comprises a shearing device for shearing a fracture rock sample, a seepage device for controlling fluid flow, a device for reducing friction and a sealing device;
the shearing device comprises a normal pressurizing plate 1, a base 8, an upper cushion block 2a and a lower cushion block 2 b; the fractured rock sample is placed between an upper cushion block 2a and a lower cushion block 2b, the upper surface of the upper cushion block 2a is connected with a normal pressurizing plate 1, and the lower cushion block 2b is fixedly connected with a base 8;
the seepage device comprises a water inlet pipe 3a, a water outlet pipe 3b, a water inlet pipe water valve 4a and a water outlet pipe water valve 4 b; the water inlet pipe 3a and the water outlet pipe 3b are respectively and correspondingly arranged in the upper cushion block 2a and the lower cushion block 2b and are respectively contacted with the upper surface and the lower surface of the rock sample 7, and the water inlet pipe 3a and the water outlet pipe 3b are respectively controlled by a water valve 4a of the water inlet pipe and a water valve 4b of the water outlet pipe;
the sealing device comprises a polyurethane sleeve 5, an upper double iron wire sealing ring 6a and a lower double iron wire sealing ring 6 b; the polyurethane sleeve 5 is sleeved outside the upper cushion block 2a, the rock sample 7 and the lower cushion block 2b, and the upper part and the lower part of the polyurethane sleeve are respectively fixed through an upper double-iron-wire sealing ring 6a and a lower double-iron-wire sealing ring 6 b;
the friction reducing device comprises a device for reducing the upper friction between the upper cushion block 2a and the rock sample 7 and a device for reducing the lower friction between the lower cushion block 2b and the rock sample 7;
the upper part friction reducing device is characterized in that an upper Teflon material 1a is uniformly coated on the contact surface of an upper cushion block 2a and a rock sample 7 so as to reduce end friction;
the lower friction reducing device is used for uniformly coating the lower Teflon material 1b on the contact surface of the lower cushion block 2b and the rock sample 7 so as to reduce end friction.
The utility model has the advantages that: the utility model discloses a device utilizes the better antifriction effect of special fluorine dragon material, has reduced the effect of the friction force between cushion and the sample effectively.
Drawings
FIG. 1 is an elevational cross-section of the friction reducing type.
Figure 2 is a detailed view of the friction reducing device.
In the figure: 1 normal pressure plate; 1a an upper teflon material; 1b a lower teflon material; 2a, arranging a cushion block; 2b, a lower cushion block; 3a water inlet pipe; 3b, discharging a water pipe; 4a, a water inlet valve; 4b, discharging a water valve; 5 a polyurethane sleeve; 6a, double iron wire sealing rings are arranged; 6b, arranging a double iron wire sealing ring; 7, testing a rock sample; 8, a base.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1-2, the device for reducing the end friction effect in the rock fracture shearing seepage experiment comprises a shearing device for shearing a fractured rock sample, a seepage device for controlling fluid flow, a friction reducing device and a sealing device;
the shearing device comprises a normal pressurizing plate 1, a base 8, an upper cushion block 2a and a lower cushion block 2 b; the fractured rock sample is placed between an upper cushion block 2a and a lower cushion block 2b, the upper surface of the upper cushion block 2a is connected with a normal pressurizing plate 1, and the lower cushion block 2b is fixedly connected with a base 8; and applying normal load to the upper cushion block 2a through the normal pressurizing plate 1, and staggering the rock sample 7 along the crack.
The seepage device comprises a water inlet pipe 3a, a water outlet pipe 3b, a water inlet pipe water valve 4a and a water outlet pipe water valve 4 b; the water inlet pipe 3a and the water outlet pipe 3b are respectively and correspondingly arranged in the upper cushion block 2a and the lower cushion block 2b and are respectively contacted with the upper surface and the lower surface of the rock sample 7, and the water inlet pipe 3a and the water outlet pipe 3b are respectively controlled by a water valve 4a of the water inlet pipe and a water valve 4b of the water outlet pipe; water flows into the water inlet pipe 3a and flows out of the water outlet pipe 3b after passing through the cracks of the rock sample 7.
The sealing device comprises a polyurethane sleeve 5, an upper double iron wire sealing ring 6a and a lower double iron wire sealing ring 6 b; the polyurethane sleeve 5 is sleeved outside the upper cushion block 2a, the rock sample 7 and the lower cushion block 2b, and the upper part and the lower part of the polyurethane sleeve are respectively fixed through an upper double-iron-wire sealing ring 6a and a lower double-iron-wire sealing ring 6 b; go up double iron wire sealing washer 6a and double iron wire sealing washer 6b down and polyurethane sleeve 5 cooperation and separate the good sealed environment of formation with the oil that provides the confined pressure with seepage flow liquid in the rock.
The friction reducing device comprises a device for reducing the upper friction between the upper cushion block 2a and the rock sample 7 and a device for reducing the lower friction between the lower cushion block 2b and the rock sample 7;
the upper part friction reducing device is characterized in that an upper Teflon material 1a is uniformly coated on the contact surface of an upper cushion block 2a and a rock sample 7 so as to reduce end friction;
the lower friction reducing device is used for uniformly coating the lower Teflon material 1b on the contact surface of the lower cushion block 2b and the rock sample 7 so as to reduce end friction.
Claims (1)
1. A device for reducing the end friction effect in a rock fracture shear seepage experiment is characterized in that the device for reducing the end friction effect in the rock fracture shear seepage experiment comprises a shearing device for shearing a fracture rock sample, a seepage device for controlling fluid flow, a device for reducing friction and a sealing device;
the shearing device comprises a normal pressurizing plate (1), a base (8), an upper cushion block (2a) and a lower cushion block (2 b); the fractured rock sample is placed between an upper cushion block (2a) and a lower cushion block (2b), the upper surface of the upper cushion block (2a) is connected with a normal pressurizing plate (1), and the lower cushion block (2b) is fixedly connected with a base (8);
the seepage device comprises a water inlet pipe (3a), a water outlet pipe (3b), a water valve (4a) of the water inlet pipe and a water valve (4b) of the water outlet pipe; the water inlet pipe (3a) and the water outlet pipe (3b) are respectively and correspondingly arranged in the upper cushion block (2a) and the lower cushion block (2b) and are respectively contacted with the upper surface and the lower surface of the rock sample (7), and the water inlet pipe (3a) and the water outlet pipe (3b) are respectively controlled by a water valve (4a) of the water inlet pipe and a water valve (4b) of the water outlet pipe;
the sealing device comprises a polyurethane sleeve (5), an upper double iron wire sealing ring (6a) and a lower double iron wire sealing ring (6 b); the polyurethane sleeve (5) is sleeved outside the upper cushion block (2a), the rock sample (7) and the lower cushion block (2b), and the upper part and the lower part of the polyurethane sleeve are respectively fixed through an upper double iron wire sealing ring (6a) and a lower double iron wire sealing ring (6 b);
the friction reducing device comprises a device for reducing upper friction between the upper cushion block (2a) and the rock sample (7) and a device for reducing lower friction between the lower cushion block (2b) and the rock sample (7);
the upper part friction reducing device is characterized in that an upper Teflon material (1a) is uniformly coated on the contact surface of an upper cushion block (2a) and a rock sample (7) so as to reduce end friction;
the lower friction reducing device is characterized in that a lower Teflon material (1b) is uniformly coated on the contact surface of the lower cushion block (2b) and the rock sample (7) so as to reduce end friction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920392888.6U CN209858563U (en) | 2019-03-27 | 2019-03-27 | Device for reducing end friction effect in rock fracture shear seepage experiment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920392888.6U CN209858563U (en) | 2019-03-27 | 2019-03-27 | Device for reducing end friction effect in rock fracture shear seepage experiment |
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| CN209858563U true CN209858563U (en) | 2019-12-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109856366A (en) * | 2019-03-27 | 2019-06-07 | 大连理工大学 | A kind of device reducing rock fracture shearing Seepage Experiment medial end portions friction effect |
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2019
- 2019-03-27 CN CN201920392888.6U patent/CN209858563U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109856366A (en) * | 2019-03-27 | 2019-06-07 | 大连理工大学 | A kind of device reducing rock fracture shearing Seepage Experiment medial end portions friction effect |
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