CN102866050A - Preparation method of irregular easily-broken coal rock block test piece - Google Patents
Preparation method of irregular easily-broken coal rock block test piece Download PDFInfo
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- CN102866050A CN102866050A CN2012103789570A CN201210378957A CN102866050A CN 102866050 A CN102866050 A CN 102866050A CN 2012103789570 A CN2012103789570 A CN 2012103789570A CN 201210378957 A CN201210378957 A CN 201210378957A CN 102866050 A CN102866050 A CN 102866050A
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Abstract
The invention provides a preparation method of an irregular easily-broken coal rock block test piece. The preparation method is suitable for manufacturing of rock mechanics test pieces of irregular easily-broken coal rock mass. Waterproof materials are coated on the surface of an easily-broken or random-shaped coal rock block, the coal rock block is arranged in a box mould suitable for the size of the coal rock block, a layer of releasing agent which is not reacted with cement is evenly coated on the inner surface of the box mould, and prepared cement grout is filled in the box mould. After the box mould is filled densely and arrives at design strength, a core drilling rig is used for drilling a column-shaped test piece, cement grout solidification sections at two ends of the column-shaped test piece obtained through drilling are cut off through a rock cutting machine, only a coal rock block section is remained, and a required coal rock test piece is obtained through planishing. The preparation method of the irregular easily-broken coal rock block test piece overcomes defects that the irregular block is not prone to clamp and broken coal rock is easy to damage, and the processed test piece guarantees mechanical properties of an original coal rock block to the maximum extent. The preparation method of the irregular easily-broken coal rock block test piece is simple, easy to operate in a machining process and low in cost and has strong practicability.
Description
Technical field
The present invention relates to a kind of test material preparation method, especially a kind of test material preparation method that is applicable to the irregular easy broken coal petrography piece of Geotechnical Engineering test.
Background technology
In industries such as geologic prospecting, civil construction, traffic, chemical industry, mining industry, building materials, metallurgy, water conservancy, military affairs, many Geotechnical Engineering scientific research projects are arranged, the research of these scientific research projects all needs to carry out a large amount of mechanical properties of rock in the laboratory and tests.Before doing the mechanical properties of rock test, at first the irregular sillar of fetching from the scene to be processed into the rock sample that meets national standard.Because on-site sampling difficulty, cause qualified rock sample processing lazy weight, cause experiment to be difficult to carry out, especially for out-of-shape or the test block processing of holding breakable coal and rock rock sample difficulty especially, often in process, just cause the destruction damage of rock sample to cause the failure of an experiment.Take the processing specification as Φ 50mm * 100mm test specimen as example.First sillar is placed on the rock drill and clamps with anchor clamps, get out the cylinder of diameter 50mm, with microtome cylindrical rock sample is cut out one perpendicular to the end face of axis, the rock sample end face is polished at wafer lapping machine, and make the verticality of this end face and axis reach requirement, after meeting the requirements after testing, along rock cylinder axial direction apart from end face 100mm place, around the circumference line, cut out an end face with microtome along this line again.Polish this end face, and detect itself and the depth of parallelism of other end, the verticality of cylinder axis and the flatness of end face, if meet the requirements, test specimen processing is namely finished.
The coal rock specimen preparation is the essential step of rock mechanics experiment, uses above-mentioned technique can successfully process most rock sample, but for little, the breakable coal petrography block of shape very irregular or intensity, often runs into unmanageable problem.For coal petrography block in irregular shape, the anchor clamps of rock drill are difficult to it is clamped, and are subjected to the effect of drill bit power easily movable in drilling through the process of test block, cause the sample of obtaining not reach standard, even can cause boring rock work and can not carry out; For little, the breakable coal petrography block of intensity, because a coal petrography block receptor site adds the power of holding and bit pressure, suffered external force is unbalanced, adds the effect of water, easily sustains damage and fragmentation in the process of boring rock, can not get required test specimen.Traditional job operation is inapplicable to these two kinds of coal petrography blocks.
Summary of the invention
Technical matters: the objective of the invention is to overcome the weak point in the prior art, the test material preparation method of simple, easy to operate, the effective irregular easy broken coal petrography piece of a kind of method is provided.
Technical scheme: the test material preparation method of irregular easy broken coal petrography piece of the present invention comprises the steps:
The first step is carried out surface treatment with easy fragmentation or coal petrography block in irregular shape, at coal petrography block surface coated with water blocking material, applies completely, dries in the air and waits it solid aside;
Second step is got and the matched case mould of coal petrography block size, at the even brushing one deck of case mould inside surface release agent, the coal petrography block of handling well is put into the case mould;
The 3rd the step, the cement grout for preparing is once injected in the case mould, and with spatula along the tamping of case mould inwall, then knock gently case mould sidewall with rubber mallet, make the filling of case mould closely knit;
In the 4th step, after moulding, maintenance is 7 ~ 8 days under normal room temperature;
The 5th step, after maintenance is finished, drill through the cylindricality test specimen along drilling through line vertically downward with core drilling rig, then will drill through the cylindricality test specimen that obtains and excise the test specimen two ends cement grout section of solidifying with rock cutter, only stay coal petrography block section, get final product to get required coal rock specimen through polishing again.
Beneficial effect: the present invention is applicable to test material preparation irregular, breakable coal and rock.Have following advantage:
1. method is simple, and process easily operates, the material of use comparatively generally, easily obtain, and die trial can reuse, cost is lower, has very strong practicality;
2. use concrete parcel coal petrography block to form that intensity is high, the integral body of regular shape, being applicable to rock mechanics test specimen irregular, breakable coal and rock makes, the test specimen that goes out through this processes can farthest guarantee the mechanical property of raw coal rock mass, and irregular block is difficult for the deficiency of clamping, fractured coal and rock destructible under the former job operation of solution.
Description of drawings
Fig. 1 is diagrammatic cross-section of the present invention.
Among the figure: coal petrography block-1, waterproof material-2, case mould-3, release agent-4, cement grout-5 bores rock line-6.
Embodiment
The test material preparation method of irregular easy broken coal petrography piece of the present invention: surface treatment is carried out in easy fragmentation or coal petrography block in irregular shape 1, apply universal GS waterproof material 2 on coal petrography block 1 surface, coating thickness is no more than 2mm, applies completely, dries in the air and waits it solid aside; Get and the matched case mould 3 of coal petrography block 1 size, at the even brushing one deck of case mould 3 inside surfaces release agent 4, the coal petrography block 1 of handling well is put into case mould 3; The cement grout 5 for preparing is once injected in the case mould 3, and with spatula along the tamping of case mould inwall, then knock gently case mould 3 sidewalls with rubber mallet, make the filling of case mould closely knit; After moulding, maintenance is 7 ~ 8 days under normal room temperature; After maintenance is finished, drill through the cylindricality test specimen along drilling through line 6 vertically downward with core drilling rig, then will drill through the cylindricality test specimen that obtains and excise the test specimen two ends cement grout section of solidifying with rock cutter, only stay coal petrography block section, get final product to get required coal rock specimen through polishing again.
Claims (1)
1. the test material preparation method of an irregular easy broken coal petrography piece is characterized in that comprising the steps:
The first step is carried out surface treatment with easy fragmentation or coal petrography block in irregular shape (1), at the surperficial coated with water blocking material of coal petrography block (1) (2), applies completely, dries in the air and waits it solid aside;
Second step is got and coal petrography block (1) the matched case mould of size (3), at case mould (3) inside surface even brushing one deck release agent (4), the coal petrography block (1) of handling well is put into case mould (3);
The 3rd the step, the cement grout (5) for preparing is once injected in the case mould (3), and with spatula along the tamping of case mould inwall, then knock gently case mould (3) sidewall with rubber mallet, make the filling of case mould closely knit;
In the 4th step, after moulding, maintenance is 7 ~ 8 days under normal room temperature;
The 5th step, after maintenance is finished, drill through the cylindricality test specimen along drilling through line (6) vertically downward with core drilling rig, then will drill through the cylindricality test specimen that obtains and excise the test specimen two ends cement grout section of solidifying with rock cutter, only stay coal petrography block section, get final product to get required coal rock specimen through polishing again.
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| CN201210378957.0A CN102866050B (en) | 2012-10-09 | 2012-10-09 | A kind of test material preparation method of irregular coal petrography block or easy broken coal petrography block |
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| CN201210378957.0A CN102866050B (en) | 2012-10-09 | 2012-10-09 | A kind of test material preparation method of irregular coal petrography block or easy broken coal petrography block |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175720A (en) * | 2013-03-16 | 2013-06-26 | 蒲成志 | Processing technique of irregular rock during indoor drilling coring |
| CN103983494A (en) * | 2014-06-09 | 2014-08-13 | 中南大学 | Test device of model for manufacturing rock masses containing interlayers and test method thereof |
| CN105352786A (en) * | 2015-11-13 | 2016-02-24 | 西安建筑科技大学 | A preparing and loading method of a broken rock test sample |
| CN105973667A (en) * | 2016-05-09 | 2016-09-28 | 贵州大学 | Preparation method of sample for hydraulic fracturing experiment of shale |
| CN106918552A (en) * | 2017-03-08 | 2017-07-04 | 中国石油大学(北京) | Rock frictional test experimental provision and method |
| CN107764612A (en) * | 2016-08-18 | 2018-03-06 | 上海宝冶建设工业炉工程技术有限公司 | Inorganic non-metallic material cylindrical specimens prepare mould and preparation method thereof |
| CN108680381A (en) * | 2018-05-16 | 2018-10-19 | 中国地质大学（武汉） | A kind of cylindrical specimens sampling method in the face containing coarse structure |
| CN109916696A (en) * | 2019-04-04 | 2019-06-21 | 东北大学 | A kind of test specimen production mold of easy irregular rock direct shear test |
| CN109946147A (en) * | 2019-04-03 | 2019-06-28 | 中国矿业大学 | A kind of coal measures composite reservoir pressure break physical analogy test material preparation method |
| CN114112496A (en) * | 2021-11-23 | 2022-03-01 | 国家能源投资集团有限责任公司 | Coring and sampling method for coal pillar test piece under strong brine soaking effect |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175720A (en) * | 2013-03-16 | 2013-06-26 | 蒲成志 | Processing technique of irregular rock during indoor drilling coring |
| CN103983494A (en) * | 2014-06-09 | 2014-08-13 | 中南大学 | Test device of model for manufacturing rock masses containing interlayers and test method thereof |
| CN105352786A (en) * | 2015-11-13 | 2016-02-24 | 西安建筑科技大学 | A preparing and loading method of a broken rock test sample |
| CN105352786B (en) * | 2015-11-13 | 2018-11-09 | 西安建筑科技大学 | A kind of fractured rock sample makes and its loading method |
| CN105973667A (en) * | 2016-05-09 | 2016-09-28 | 贵州大学 | Preparation method of sample for hydraulic fracturing experiment of shale |
| CN107764612A (en) * | 2016-08-18 | 2018-03-06 | 上海宝冶建设工业炉工程技术有限公司 | Inorganic non-metallic material cylindrical specimens prepare mould and preparation method thereof |
| CN106918552A (en) * | 2017-03-08 | 2017-07-04 | 中国石油大学(北京) | Rock frictional test experimental provision and method |
| CN108680381A (en) * | 2018-05-16 | 2018-10-19 | 中国地质大学（武汉） | A kind of cylindrical specimens sampling method in the face containing coarse structure |
| CN109946147A (en) * | 2019-04-03 | 2019-06-28 | 中国矿业大学 | A kind of coal measures composite reservoir pressure break physical analogy test material preparation method |
| CN109946147B (en) * | 2019-04-03 | 2020-03-10 | 中国矿业大学 | Preparation method of coal-series composite reservoir fracturing physical simulation test piece |
| CN109916696A (en) * | 2019-04-04 | 2019-06-21 | 东北大学 | A kind of test specimen production mold of easy irregular rock direct shear test |
| CN114112496A (en) * | 2021-11-23 | 2022-03-01 | 国家能源投资集团有限责任公司 | Coring and sampling method for coal pillar test piece under strong brine soaking effect |
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