CN111504750B - Irregular coal rock sample preparation method - Google Patents
Irregular coal rock sample preparation method Download PDFInfo
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- CN111504750B CN111504750B CN202010458475.0A CN202010458475A CN111504750B CN 111504750 B CN111504750 B CN 111504750B CN 202010458475 A CN202010458475 A CN 202010458475A CN 111504750 B CN111504750 B CN 111504750B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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Abstract
The invention provides a method for preparing an irregular coal rock sample, and belongs to the field of rock mechanics tests. The irregular coal rock sample preparation method is characterized in that a sample preparation mould is applied, the sample preparation mould comprises a bottom plate and four side plates, the left side edge and the lower side edge of each side plate are respectively provided with a magnet strip, the upper side edge of each side plate is provided with a hook groove, the top end of the upper side edge of each side plate is close to the left side, a pressing plate is hinged at the position of the top end of each side plate, the middle position of each pressing plate is connected with one end of a tensioning rope, the other end of each tensioning rope is provided with a hook, and the top end of each upper side edge of each side plate is provided with a clamping part for being in clamping connection with the corresponding pressing plate; the irregular coal rock sample preparation method comprises the following steps: step one, positioning a die; step two, reinforcing between the side plates of the die; step three, injecting materials into the mould; and fourthly, demolding the sample. The invention enables the irregular coal rock sample and the filling material to form the sample with an integral structure and a regular shape, is convenient to fix by using the traditional fixing devices such as a bench vice and the like, is convenient for subsequent operations such as coring or cutting the sample to manufacture the sample, and improves the success rate of manufacturing the sample.
Description
Technical Field
The invention relates to the field of rock mechanics tests, in particular to a method for preparing irregular coal rock samples.
Background
Before rock mechanics test, the block coal sample and rock sample collected in site need to be cored or cut in a laboratory to manufacture a test piece meeting the requirements. According to the relevant standard requirements, the specimens are usually manufactured into cylindrical specimens with a diameter of 50mm and a height of 100mm or with an aspect ratio of 2 by means of a coring operation. The fixing device is mainly a bench vice or an improved device similar to the bench vice, and the bench vice clamps the coal rock sample by two parallel flat clamps through manual rotation bolts. But the coal and rock samples collected on site are all in irregular shapes, the contact area between the flat plate-shaped clamp and the coal and rock samples is small, and the fixation is unstable; in addition, the existing flat-plate-shaped clamp is made of hard materials, the coal and rock samples are damaged due to overlarge clamping force, and the coal and rock samples shake in the coring process due to overlarge clamping force, so that coring fails.
The Chinese patent document with the publication number of CN207528492U discloses an irregularly-shaped soft rock block coring fixing device, which realizes the clamping and fixing of irregularly-shaped coal rock samples by three-dimensionally arranging a plurality of threaded rods, wherein the clamping is firm, but the threaded rods are hard materials, and the tail ends of the threaded rods are provided with jackets to reduce the problems caused by the hard materials, but the improvement effect is poor; in addition, the device clamp is fixed the operation more loaded down with trivial details, and for manual operation, waste time and energy.
Disclosure of Invention
The invention aims to provide a method for preparing irregular coal rock samples, which is characterized in that the irregular coal rock samples are prepared into regular samples and are fixed by using a bench vice and other traditional fixing devices.
In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:
the irregular coal rock sample preparation method is characterized by applying a sample preparation mould, wherein the sample preparation mould comprises a bottom plate and four side plates, the bottom plate and the side plates are made of magnetic attraction materials, the left side edge and the lower side edge of each side plate are provided with magnet strips, the upper side edge of each side plate is provided with a hook groove, the position, close to the left side, of the top end of the upper side edge of each side plate is hinged with a pressing plate, the middle position of each pressing plate is connected with one end of a tensioning rope, the other end of each tensioning rope is provided with a hook, and the top end of the upper side edge of each side plate is provided with a clamping part for being in clamping connection with the corresponding pressing plate;
the irregular coal rock sample preparation method comprises the following steps:
step one, positioning a die
The bottom plate is placed on a horizontal plane, four side plates are vertically placed on the bottom plate, the lower side edges of the side plates are magnetically connected with the bottom plate, the four side plates are mutually and vertically arranged in pairs, and the left side edge of one adjacent side plate is magnetically connected with the inner side of the other adjacent side plate;
step two, reinforcing between side plates of die
Hooking hooks of one adjacent side plate to a hook groove of the other adjacent side plate, flattening the pressing plate, and clamping and connecting the pressing plate and the clamping part to tighten the tightening rope so as to strengthen the connection between the adjacent side plates;
step three, injecting materials into the mould
Placing irregular coal rock samples in the middle positions of surrounding spaces of the four side plates and the bottom plate, and injecting filling materials into the sample preparation mould;
step four, sample demoulding
After the filling material in the die is solidified, the irregular coal rock sample and the filling material are connected into a whole to form a sample with a regular shape, the pressing plate is separated from the clamping part to enable the tensioning rope to be loosened, the hooks of the adjacent side plates are separated from the hook grooves of the adjacent side plates, the side plates are detached, and the sample is taken down from the bottom plate.
In the first step, when the left side edge of one adjacent side plate is magnetically connected with the inner side of the other adjacent side plate, the connecting positions of the adjacent side plates are adjusted so that the four side plates and the bottom plate are wrapped into spaces with different volume sizes.
Further, the top end of the upper side edge of the side plate is provided with a graduated scale along the extending direction of the side plate;
in the first step, when the left side edge of the adjacent side plate is magnetically connected with the inner side of the adjacent side plate, the connecting position between the adjacent side plates is adjusted through a graduated scale.
Further, the hook groove is formed by outwards turning the upper side edge of the side plate.
Further, the magnetic material is iron.
Further, the filling material is concrete.
Further, the tightening rope is provided as a wire having elasticity.
Further, one end of the tensioning rope is hinged to the middle position of the pressing plate.
The beneficial technical effects of the invention are as follows:
the irregular coal rock sample preparation method disclosed by the invention is simple and practical by applying the creatively designed sample preparation mould, and is convenient to assemble and disassemble in the sample preparation application process; through injecting filling material into the mould, make irregular coal rock sample and filling material form the regular sample of integral structure shape, be convenient for utilize traditional fixing device such as bench vice to be fixed to follow-up operation such as coring or cutting to the sample in order to make the test piece, improve the success rate of test piece preparation.
Drawings
FIG. 1 is a flow chart of a method for preparing irregular coal rock samples according to an embodiment of the present invention;
FIG. 2 is a top view of a sample mold used in the irregular coal rock sample preparation method according to an embodiment of the present invention;
FIG. 3 is a top view of an irregular coal rock sample preparation method according to an embodiment of the present invention after filling a filler material with a sample preparation mold;
FIG. 4 is a top view of a regular-shape sample produced by the irregular coal rock sample production method of the embodiment of the present invention;
FIG. 5 is a schematic view of a side plate in a sample preparation mold applied to the irregular coal rock sample preparation method according to the embodiment of the invention;
FIG. 6 is a top view of the side panel of FIG. 4, with the pressure plate, tensioning line and hanger omitted;
FIG. 7 is a right side view of the side panel of FIG. 4, with the pressure plate, tensioning line and hanger omitted;
fig. 8 is a schematic view of the assembly between adjacent side panels.
Detailed Description
The present invention will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent.
Some embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments are shown. Indeed, various embodiments of the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements.
In an embodiment of the present invention, a method for preparing an irregular coal rock sample is provided, and please refer to fig. 1 to 8.
The utility model provides an irregular coal rock sample preparation method, uses the system appearance mould, and the system appearance mould includes bottom plate 11 and four curb plates 12, and bottom plate 11 and curb plate 12 are by the magnetism nature material of inhaling, and this embodiment prefers magnetism nature material to be iron for bottom plate 11 and curb plate 12 can be connected with magnet magnetism and realize preliminary overlap joint location. The left side and the lower side of the side plate 12 are respectively provided with a magnet strip 2, and the magnet strips 2 are used for realizing preliminary lap joint positioning by being magnetically connected with the bottom plate 11 and the side plate 12.
The upper side of the side plate 12 is provided with a hook groove 121, and the hook groove 121 of the present embodiment is formed by folding the upper side of the side plate 12 outward. The hooking groove 121 is used for hooking and connecting with the hook 33 on the adjacent side plate 12.
The top end of the upper side edge of the side plate 12 is hinged with a pressing plate 31 near the left side, a first hinge 41 is arranged in the middle of the pressing plate 31, the first hinge 41 is connected with one end of a tensioning rope 32, the other end of the tensioning rope 32 is provided with a hook 33, and the hook 33 is used for hooking and connecting with a hook groove 121 on the adjacent side plate 12. The tensioning cord 32 is preferably a wire having elasticity in this embodiment.
The top end of the upper side of the side plate 12 is provided with a clamping part for clamping and connecting with the tail end of the pressing plate 31. The clamping part is not shown in the drawing, the clamping part can be a buckle, the opening size of the buckle is slightly smaller than the width of the tail end of the pressing plate 31, and the tail end of the pressing plate 31 can be clamped on the buckle from the opening of the buckle.
The top end of the upper side edge of the side plate 12 is provided with a graduated scale 5 along the extending direction of the side plate 12, and the connecting position between the adjacent side plates 12 is adjusted by the graduated scale 5, so that the four side plates 12 and the bottom plate 11 are wrapped into spaces with different volume sizes to adapt to irregular coal rock samples 6 with different sizes and specifications, and further the irregular coal rock samples are used for manufacturing samples with different sizes and regular shapes.
The irregular coal rock sample preparation method of the embodiment comprises the following steps:
step one, positioning a die
The bottom plate 11 is placed on a horizontal plane, four side plates 12 are vertically placed on the bottom plate 11, the lower side edges of the side plates 12 are magnetically connected with the bottom plate 11, the four side plates 12 are mutually and vertically arranged in pairs, and the left side edge of one adjacent side plate 12 is magnetically connected with the inner side of the other adjacent side plate 12. According to irregular coal rock samples 6 with different dimensions, the size of the wrapping space of the four side plates 12 and the bottom plate 11 is adjusted, so that the die is positioned through magnetic connection.
When the left side edge of one side plate 12 adjacent to the other side plate 12 adjacent to the side plate 12 is magnetically connected, the connecting position between the adjacent side plates 12 is adjusted through the graduated scale 5, so that the four side plates 12 and the bottom plate 11 are wrapped into spaces with different volume sizes to adapt to irregular coal rock samples 6 with different sizes, and further the irregular coal rock samples are used for manufacturing samples with different sizes and regular shapes.
Step two, reinforcing between side plates of die
The hooks 33 of the adjacent side plates 12 are hooked with the hook grooves 121 of the adjacent other side plate 12, the pressing plate 31 is flattened, and the pressing plate 31 is clamped and connected with the clamping part to enable the tensioning rope 32 to be tensioned, so that the connection between the adjacent side plates 12 is reinforced. When the filling material 7 is injected into the three-way mold in the step two, the filling material 7 can expand and spread around, and the mold side plates 12 can be connected and reinforced through the step two.
Step three, injecting materials into the mould
The irregular coal rock sample 6 is placed in the middle position of the surrounding space of the four side plates 12 and the bottom plate 11, and the filling material 7 is injected into the sample preparation mould, and the filling material 7 is preferably concrete.
Step four, sample demoulding
After the filling material 7 in the mold is solidified, the irregular coal rock sample 6 and the filling material 7 are connected into a whole to form a sample with a regular shape, the pressing plate 31 is separated from the clamping part to release the tensioning rope 32, the hooks 33 of the adjacent side plate 12 are separated from the hook grooves 121 of the adjacent side plate 12, the side plate 12 is detached, and the sample is taken out from the bottom plate 11.
The removed sample is a sample with regular shape and can be fixed by using a bench vice and other traditional fixing devices.
The present embodiment has been described in detail with reference to the accompanying drawings. From the above description, a person skilled in the art should have a clear knowledge of a method for preparing irregular coal and rock samples according to the present invention. The sample preparation mold with innovative design is applied, the mold is simple and practical, and the assembly and disassembly operations are convenient in the sample preparation application process; through injecting the filling material 7 into the mould, make irregular coal rock sample 6 and filling material 7 form the regular sample of integral structure shape, can utilize traditional fixing device such as bench vice fixed to follow-up operation such as coring or cutting to the sample in order to make the test piece, improve the success rate of test piece preparation. While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (8)
1. The irregular coal rock sample preparation method is characterized by comprising the steps of applying a sample preparation die, wherein the sample preparation die comprises a bottom plate and four side plates, the bottom plate and the side plates are made of magnetic attraction materials, the left side edge and the lower side edge of each side plate are provided with magnet strips, the upper side edge of each side plate is provided with a hook groove, a pressing plate is hinged to the top end of the upper side edge of each side plate at a position close to the left side, one end of a tensioning rope is connected to the middle position of each pressing plate, a hook is arranged at the other end of each tensioning rope, and a clamping part for being in clamping connection with the pressing plate is arranged at the top end of each upper side edge of each side plate;
the irregular coal rock sample preparation method comprises the following steps:
step one, positioning a die
The bottom plate is placed on a horizontal plane, four side plates are vertically placed on the bottom plate, the lower side edges of the side plates are magnetically connected with the bottom plate, the four side plates are mutually and vertically arranged in pairs, and the left side edge of one adjacent side plate is magnetically connected with the inner side of the other adjacent side plate;
step two, reinforcing between side plates of die
Hooking hooks of one adjacent side plate to a hook groove of the other adjacent side plate, flattening the pressing plate, and clamping and connecting the pressing plate and the clamping part to tighten the tightening rope so as to strengthen the connection between the adjacent side plates;
step three, injecting materials into the mould
Placing irregular coal rock samples in the middle positions of surrounding spaces of the four side plates and the bottom plate, and injecting filling materials into the sample preparation mould;
step four, sample demoulding
After the filling material in the die is solidified, the irregular coal rock sample and the filling material are connected into a whole to form a sample with a regular shape, the pressing plate is separated from the clamping part to enable the tensioning rope to be loosened, the hooks of the adjacent side plates are separated from the hook grooves of the adjacent side plates, the side plates are detached, and the sample is taken down from the bottom plate.
2. The method for preparing irregular coal rock samples according to claim 1, wherein: in the first step, when the left side edge of one adjacent side plate is magnetically connected with the inner side of the other adjacent side plate, the connecting positions of the adjacent side plates are adjusted so that the four side plates and the bottom plate are wrapped into spaces with different volume sizes.
3. A method for preparing an irregular coal rock sample according to claim 2, wherein: the top end of the upper side edge of the side plate is provided with a graduated scale along the extending direction of the side plate;
in the first step, when the left side edge of the adjacent side plate is magnetically connected with the inner side of the adjacent side plate, the connecting position between the adjacent side plates is adjusted through a graduated scale.
4. The method for preparing irregular coal rock samples according to claim 1, wherein: the hook groove is formed by outwards turning the upper side edge of the side plate.
5. The method for preparing irregular coal rock samples according to claim 1, wherein: the magnetic attraction material is iron.
6. The method for preparing irregular coal rock samples according to claim 1, wherein: the filling material is concrete.
7. The method for preparing irregular coal rock samples according to claim 1, wherein: the tightening rope is provided as a wire having elasticity.
8. The method for preparing irregular coal rock samples according to claim 1, wherein: one end of the tensioning rope is hinged to the middle position of the pressing plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010458475.0A CN111504750B (en) | 2020-05-27 | 2020-05-27 | Irregular coal rock sample preparation method |
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| CN202010458475.0A CN111504750B (en) | 2020-05-27 | 2020-05-27 | Irregular coal rock sample preparation method |
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| CN111504750B true CN111504750B (en) | 2023-06-27 |
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| JPH0681707U (en) * | 1993-04-30 | 1994-11-22 | セフテイ工業株式会社 | Clamping tool used for concrete product molding form |
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| CN111504750A (en) | 2020-08-07 |
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