CN111504750A - Irregular coal rock sample preparation method - Google Patents
Irregular coal rock sample preparation method Download PDFInfo
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- CN111504750A CN111504750A CN202010458475.0A CN202010458475A CN111504750A CN 111504750 A CN111504750 A CN 111504750A CN 202010458475 A CN202010458475 A CN 202010458475A CN 111504750 A CN111504750 A CN 111504750A
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- plate
- sample preparation
- coal rock
- rock sample
- side plate
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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
Abstract
The invention provides a sample preparation method for an irregular coal rock sample, and belongs to the field of rock mechanical tests. The irregular coal and rock sample preparation method is characterized in that a sample preparation mold is applied, the sample preparation mold comprises a bottom plate and four side plates, magnet strips are arranged on the left side and the lower side of each side plate, hook grooves are formed in the upper side of each side plate, a pressing plate is hinged to the position, close to the left side, of the top end of the upper side of each side plate, the middle of each pressing plate is connected with one end of a tensioning rope, a hook is arranged at the other end of each tensioning rope, and a clamping portion used for being clamped and connected with the pressing plate is arranged at the top; the irregular coal rock sample preparation method comprises the following steps: step one, positioning a mould; secondly, reinforcing the side plates of the die; step three, injecting materials into the die; and step four, demoulding the sample. The invention enables the irregular coal rock sample and the filling material to form a sample with a regular structure and shape, and is convenient to be fixed by using a traditional fixing device such as a bench vice, so as to facilitate the subsequent operations of coring or cutting the sample and the like to manufacture the sample, and improve the success rate of manufacturing the sample.
Description
Technical Field
The invention relates to the field of rock mechanical tests, in particular to a sample preparation method for an irregular coal rock sample.
Background
Before a rock mechanical test, a sample of massive coal and rock collected on site needs to be cored or cut in a laboratory to manufacture a test piece meeting the requirements. According to relevant standard requirements, a sample is usually made into a cylindrical test piece with the diameter of 50mm and the height of 100mm or a cylindrical test piece with the height-diameter ratio of 2 through a coring operation. Fixing device need be used to the core in-process at the coal petrography sample, and traditional fixing device is mainly for the bench vice, or with the close improvement device of bench vice, and the bench vice is passed through the manpower by two parallel flat-plate anchor clamps and is rotated the bolt and press from both sides the coal petrography sample tightly. However, the coal and rock samples collected on site are all irregular in shape, and the flat-plate-shaped clamp is small in contact area with the coal and rock samples and is not firmly fixed; in addition, current flat-plate anchor clamps are hard material, and the clamp force too big can lead to the coal rock sample damaged, and the clamp force undersize can lead to coring in-process coal rock sample to rock to get the core failure.
Chinese patent publication No. CN207528492U discloses an irregular-shaped soft rock coring fixing device, which is characterized in that a plurality of threaded rods are arranged in a three-dimensional manner to clamp and fix irregular-shaped coal rock samples, the clamping is firm, but the threaded rods are made of hard materials, and a sheath is arranged at the tail end of each threaded rod to reduce the problems caused by the hard materials, but the improvement effect is poor; in addition, the clamping and fixing operation of the device is complicated, and the device is manually operated, so that the time and labor are wasted.
Disclosure of Invention
The invention aims to provide a method for preparing an irregular coal rock sample, which is characterized in that the irregular coal rock sample is prepared into a regular sample and is fixed by using a traditional fixing device such as a bench vice.
In order to achieve the above purpose, the technical solution adopted by the invention is as follows:
a sample preparation method of an irregular coal rock sample is characterized in that a sample preparation mold is applied, the sample preparation mold comprises a bottom plate and four side plates, the bottom plate and the side plates are both made of magnetic materials, magnet strips are arranged on the left side and the lower side of each side plate, hook grooves are formed in the upper side of each side plate, a pressing plate is hinged to the top end of the upper side of each side plate, the top end of each side plate is close to the left side of each side plate, the middle position of each pressing plate is connected with one end of a tensioning rope, a hook is arranged at the other end of each tensioning rope, and a clamping portion used for being clamped and;
the irregular coal rock sample preparation method comprises the following steps:
step one, positioning a die
Placing a bottom plate on a horizontal plane, vertically placing four side plates on the bottom plate, wherein the lower side edges of the side plates are magnetically connected with the bottom plate, the four side plates are arranged in a mutually vertical manner 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 the die
The hook of one adjacent side plate is hooked with the hook groove of the other adjacent side plate, the pressing plate is pressed flatly, and the pressing plate is connected with the clamping part in a clamping manner to enable the tensioning rope to be tensioned, so that the connection between the adjacent side plates is reinforced;
step three, injecting the material into the mold
Placing the irregular coal rock sample in the middle of the surrounding space of the four side plates and the bottom plate, and injecting a filling material into the sample preparation mold;
step four, demoulding the sample
After the filling material in the mold 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 loosen the tensioning rope, the hook of one adjacent side plate is separated from the hook groove of the other adjacent side plate, the side plates are disassembled, and the sample is taken down from the bottom plate.
Furthermore, 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 connection position between the adjacent side plates is adjusted to enable the four side plates and the bottom plate to surround spaces with different volume sizes.
Furthermore, a graduated scale is arranged at the top end of the upper side edge of the side plate along the extending direction of the side 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 position between the adjacent side plates is adjusted through the graduated scale.
Further, the hook groove is formed by turning the upper side edge of the side plate outwards.
Further, the magnetic material is iron.
Further, the filling material is concrete.
Further, the tensioning rope is arranged to be a metal wire with elasticity.
Furthermore, the middle position of the pressure plate is hinged with one end of the tensioning rope.
The beneficial technical effects of the invention are as follows:
according to the irregular coal rock sample preparation method, the sample preparation mold which is innovatively designed is applied, the mold is simple and practical, and the assembly and disassembly operation is convenient in the sample preparation application process; through pouring into filling material into the mould, make irregular coal rock sample and filling material form the regular sample of integrative structure shape, be convenient for utilize traditional fixing device such as bench vice fixed to follow-up coring or cutting etc. operation to the sample in order to make the test piece, improve the success rate of test piece preparation.
Drawings
FIG. 1 is a flowchart of a method for preparing an irregular coal rock sample according to an embodiment of the invention;
FIG. 2 is a top view of a sample preparation mold applied to the irregular coal rock sample preparation method according to the embodiment of the invention;
FIG. 3 is a top view of the irregular coal and rock sample preparation method according to the embodiment of the present invention after filling material is injected by using the sample preparation mold;
FIG. 4 is a top view of a sample with a regular shape prepared by the irregular coal rock sample preparation method according to the embodiment of the invention;
FIG. 5 is a schematic structural diagram 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, tension cord and hook omitted;
FIG. 7 is a right side view of the side panel of FIG. 4 with the pressure plate, tension cord and hook omitted;
fig. 8 is a schematic view of the assembly between adjacent side plates.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
Certain embodiments of the invention now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention 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, please refer to fig. 1 to 8.
The utility model provides an irregular coal petrography appearance system method, uses system appearance mould, and system appearance mould includes bottom plate 11 and four curb plates 12, and bottom plate 11 and curb plate 12 are made by magnetic material, and the preferred magnetic material of this embodiment is 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 curb plate 12 all are provided with magnet strip 2, and magnet strip 2 is used for realizing preliminary overlap joint location with bottom plate 11 and curb plate 12 magnetic connection.
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 hook 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 of the side plate 12 is hinged with a pressing plate 31 close to the left side, a first hinge 41 is arranged at the middle position of the pressing plate 31, the first hinge 41 is connected with one end of a tensioning rope 32, a hook 33 is arranged at the other end of the tensioning rope 32, and the hook 33 is used for being hooked and connected with a hook groove 121 on the adjacent side plate 12. The preferred embodiment of the tension cord 32 is a resilient wire.
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 pressure plate 31, and the tail end of the pressure plate 31 can be clamped on the buckle from the opening of the buckle.
The top 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 to be used for manufacturing samples with regular shapes and different sizes and specifications.
The irregular coal rock sample preparation method comprises the following steps:
step one, positioning a die
The bottom plate 11 is placed on a horizontal plane, the 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 arranged in a pairwise perpendicular mode, 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 sizes and specifications, the size of the surrounding space of the four side plates 12 and the bottom plate 11 is adjusted, so that the mold is positioned through magnetic connection.
When the left side edge of one adjacent side plate 12 is magnetically connected with the inner side of the other adjacent side plate 12, 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 specifications, and further to be used for manufacturing samples with different sizes and specifications and regular shapes.
Step two, reinforcing between side plates of the die
The hook 33 of one adjacent side plate 12 is hooked on the hook groove 121 of the other adjacent side plate 12, the pressing plate 31 is pressed flat, the pressing plate 31 is engaged with the engaging portion, and the tightening rope 32 is tightened to reinforce the connection between the adjacent side plates 12. When the filling material 7 is injected into the three-way mold in the step two, the filling material 7 expands and diffuses to the periphery, and the connection between the side plates 12 of the mold can be reinforced through the step two.
Step three, injecting the material into the mold
Placing the irregular coal rock sample 6 in the middle of the space surrounded by the four side plates 12 and the bottom plate 11, and injecting a filling material 7 into the sample preparation mold, wherein the filling material 7 is preferably concrete.
Step four, demoulding the sample
After the filler 7 in the mold is solidified, the irregular coal rock sample 6 and the filler 7 are connected to form a sample having a regular shape, the pressure plate 31 is separated from the engaging portion to release the tension rope 32, the hook 33 of the adjacent side plate 12 is separated from the hook groove 121 of the adjacent other side plate 12, the side plates 12 are detached, and the sample is taken out from the bottom plate 11.
The sample that takes off is the sample of regular shape, can utilize traditional fixing device such as bench vice to fix.
Up to this point, the present embodiment has been described in detail with reference to the accompanying drawings. From the above description, those skilled in the art should clearly understand that the irregular coal rock sample preparation method of the present invention. The sample preparation mold is innovatively designed, is simple and practical, and is convenient to assemble and disassemble in the sample preparation application process; through injecting packing material 7 into the mould, make irregular coal rock sample 6 and packing material 7 form the regular sample of integrative structure shape, can utilize traditional fixing device such as bench vice fixed to follow-up coring or cutting etc. to the sample in order to make the test piece, improve the success rate of test piece preparation. The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The irregular coal rock sample preparation method is characterized in that a sample preparation mold is applied, the sample preparation mold comprises a bottom plate and four side plates, the bottom plate and the side plates are both made of magnetic material, magnet strips are arranged on the left side and the lower side of each side plate, hook grooves are formed in the upper side of each side plate, a pressing plate is hinged to the top end of the upper side of each side plate, the top end of each side plate is close to the left side of each side plate, the middle position of each pressing plate is connected with one end of a tensioning rope, a hook is arranged at the other end of each tensioning rope, and a clamping portion used for being clamped and connected with the pressing plate is arranged;
the irregular coal rock sample preparation method comprises the following steps:
step one, positioning a die
Placing a bottom plate on a horizontal plane, vertically placing four side plates on the bottom plate, wherein the lower side edges of the side plates are magnetically connected with the bottom plate, the four side plates are arranged in a mutually vertical manner 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 the die
The hook of one adjacent side plate is hooked with the hook groove of the other adjacent side plate, the pressing plate is pressed flatly, and the pressing plate is connected with the clamping part in a clamping manner to enable the tensioning rope to be tensioned, so that the connection between the adjacent side plates is reinforced;
step three, injecting the material into the mold
Placing the irregular coal rock sample in the middle of the surrounding space of the four side plates and the bottom plate, and injecting a filling material into the sample preparation mold;
step four, demoulding the sample
After the filling material in the mold 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 loosen the tensioning rope, the hook of one adjacent side plate is separated from the hook groove of the other adjacent side plate, the side plates are disassembled, and the sample is taken down from the bottom plate.
2. The irregular coal rock sample preparation method according to claim 1, characterized in that: 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 to enable the four side plates and the bottom plate to wrap spaces with different volume sizes.
3. The irregular coal rock sample preparation method according to claim 2, characterized in that: the top end of the upper side edge of the side plate is provided with a graduated scale along the extension direction of the side 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 position between the adjacent side plates is adjusted through the graduated scale.
4. The irregular coal rock sample preparation method according to claim 1, characterized in that: the hook groove is formed by turning the upper side edge of the side plate outwards.
5. The irregular coal rock sample preparation method according to claim 1, characterized in that: the magnetic material is iron.
6. The irregular coal rock sample preparation method according to claim 1, characterized in that: the filling material is concrete.
7. The irregular coal rock sample preparation method according to claim 1, characterized in that: the tensioning rope is arranged to be an elastic metal wire.
8. The irregular coal rock sample preparation method according to claim 1, characterized in that: the middle position of the pressing plate is hinged with one end of the tensioning rope.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010458475.0A CN111504750B (en) | 2020-05-27 | 2020-05-27 | Irregular coal rock sample preparation method |
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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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| CN111504750A true CN111504750A (en) | 2020-08-07 |
| CN111504750B CN111504750B (en) | 2023-06-27 |
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| Publication number | Publication date |
|---|---|
| CN111504750B (en) | 2023-06-27 |
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