CN105928751A - Method for preparing corrosion coal and analyzing and testing physical mechanics weakening characteristic - Google Patents
Method for preparing corrosion coal and analyzing and testing physical mechanics weakening characteristic Download PDFInfo
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- CN105928751A CN105928751A CN201610225601.1A CN201610225601A CN105928751A CN 105928751 A CN105928751 A CN 105928751A CN 201610225601 A CN201610225601 A CN 201610225601A CN 105928751 A CN105928751 A CN 105928751A
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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Abstract
The invention discloses a method for preparing corrosion coal and analyzing and testing physical mechanics weakening characteristic. The method includes (1) preparing corrosion coal: putting corrosion liquid with pH value of 4-10 into a corrosion case, starting a heater, putting the coal test piece and coal sample with size of 4-60 mesh into the corrosion liquid, performing sealing with a sealant, starting a swirl generator, and waiting 1-60 days; (2) analyzing the mesostructure of the coal test piece and the change of the metallographic structure; and (3) performing uniaxial compression test and gas-containing triaxial compression test for the coal test piece, performing uniaxial compression test after pressing the coal sample to be coal test piece, and testing the change of the mechanical characteristic. The method can be used for improving the working solution to improve the effect of hydraulic permeability improvement measure by means of researching the physical mechanics weakening characteristic of the corrosion coal, provides support for the gas control, can effectively simulate the change of the coal body in the deep mine under the effect of underground drainage, and provides support for the research of the rule of the mine geological disaster in the complicated condition and the prophylaxis and treatment of the mine geological disaster.
Description
Technical field
The present invention relates to control of coalmine gas and hazards control field, especially relate to a kind of corrosion coal preparation and physical mechanics
Weakening characteristic analysis test method.
Background technology
Along with deep being continuously increased adopted by coal, progress of coal mining occurs in that a series of problem, such as high methane pressure, low
The exploitation in gas coal seam, it is necessary to take gas govenance；And for example run into the erosion effect of lithic drainage, it is necessary to do corresponding
Supporting measure, in case occur geological disaster.Waterpowerization is anti-reflection, and measure is widely used in low due to its practicality and high efficiency
The gas control in gas coal seam, such as fracturing and hydraulic slotted liner technique, the most existing a lot of achievements in research, but without about pressure
Split or slot working solution and coal body interact the effective ways to gas pumping influence research.Owing to coal containing various mineral,
Such as pyrite, kaolinite etc., it can present different sensitivity to the solution of different PH, can produce certain corrosion phenomenon
And the reduction phenomenon on physics and mechanics occur, thus, it is necessary to invention one can characterize solution (waterpower in coal body recovery process
Change working solution or the subsoil water solution of anti-reflection measure) and a set of research method of coal effect, for improving the anti-reflection measure of waterpowerization and preventing
Control the geological disaster in terms of lithic drainage and support is provided.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of corrosion coal preparation and physical mechanics weakening characteristic analysis test method, both
The physical mechanics before and after fracturing and the working environment of hydraulic slotted liner technique working solution and corrosion can be simulated and weaken change, can simulate again
The change that in Deep Mine, coal body occurs under lithic drainage effect.
The technical scheme is that
A kind of corrosion coal preparation and physical mechanics weakening characteristic analysis test method, comprising:
1) prepared by corrosion coal: by pH value be 4～10 configuration corrosion liquid, corrosion liquid is put in corrosion case, start heater pair
Corrosion liquid is heated to 20～70 DEG C, then is respectively placed in molten by the coal test specimen of a size of Φ 50mm × 100mm and the coal sample of 4～60 mesh
Lose in liquid and be submerged, building case lid, with the contact edge edge of sealant sealing corrosion case Yu case lid, opening rotational flow generator, put
Put 1～60 day；
Wherein, a side bottom of corrosion case arranges heater, top arranges rotational flow generator, arranges bottom the opposite side of corrosion case
Liquid outlet；Described case lid can be together on corrosion case, and contact portion uses sealant sealing during preparation corrosion coal, outside completely cutting off
Boundary's air；On described liquid outlet, gate valve is set；
2) carefully see visual analysis: take out coal test specimen and be positioned over the indoor 1 of 20～30 DEG C～dry for 7 days, then analyze the thin sight of coal test specimen
Structure and metallographic structure change；
3) Mechanics Performance Testing: take out coal test specimen and carry out uniaxial compression test respectively, the indoor 1 of 20～30 DEG C～after drying for 7 days
Carry out containing gas triaxial compression test；Take out coal sample and be pressed into moulded coal test specimen after the indoor 6～24h of 20～30 DEG C are dried, then enter
Row uniaxial compression test, test mechanical property change.
Further, corrosion liquid is by HF, HCl, H2SO4、KHSO4Or HNO3Configuration PH is the solution of 4～7, or by
NaOH or KOH configuration PH is the solution of 7～10.
The invention has the beneficial effects as follows: the present invention can be used for improveing working solution by the physical mechanics weakening characteristic of research corrosion coal
And then improve fracturing and hydraulic slotted liner technique effect, provide for gas control and support；Can effectively simulate again coal body in Deep Mine to exist
The change occurred under lithic drainage effect, provides for research complex condition Mine Geological Hazard rule and preventing and treating thereof and supports；Additionally,
The content of N and S can also be reduced, it is achieved the purifying use of the energy by the modulation coal-fired component of corrosion liquid improvement, reduces fire coal
The burden that environment is caused.
Accompanying drawing explanation
Fig. 1 is that corrosion coal of the present invention prepares structural representation.
Wherein: 1 corrosion case, 2 case lids, 3 fluid sealants, 4 heaters, 5 rotational flow generators, 6 liquid outlets, 7
Gate valve, 8 corrosion liquid, 9 coal test specimens, 10 coal samples.
Detailed description of the invention
The present invention is further elaborated with embodiment below in conjunction with the accompanying drawings.
As it is shown in figure 1, a side bottom of corrosion case 1 arranges heater 4, top arranges rotational flow generator 5, heater 4 is molten
Thermal ablative liquid 8 is added so that it is keeping certain corrosion temperature, rotational flow generator 5 is root during prepared by corrosion coal during erosion coal preparation
Need to manufacture flowing according to simulated conditions, make corrosion liquid 8 be in the flow regime of certain flow rate；Arrange bottom the opposite side of corrosion case
Liquid outlet 6；Case lid 2 can be together on corrosion case 1, and contact portion uses fluid sealant 3 to seal during preparation corrosion coal, with every
Outside air absolutely；The discharge of corrosion liquid 8, by liquid outlet 6, it arranges gate valve 7 and controls on an off；
A kind of corrosion coal preparation and physical mechanics weakening characteristic analysis test method, its enforcement includes:
1) prepared by corrosion coal: will be by HF, HCl, H2SO4、KHSO4Or HNO3Configuration PH is 4～7, or by NaOH
Or the corrosion liquid 8 that KOH configuration PH is 7～10 is put in corrosion case 1, starts heater 4 and corrosion liquid 8 is heated to 20～70 DEG C
A certain steady temperature, then the coal sample 10 of coal test specimen 9 and 4～60 mesh of a size of Φ 50mm × 100mm is respectively placed in corrosion
In liquid 8 and be submerged, build case lid 2, seal corrosion case 1 and case lid 2 contact edge edge with fluid sealant 3, open eddy flow and occur
Device 5, makes corrosion liquid 8 be in certain flow rate, places 1～60 day；
2) carefully see visual analysis: take out coal test specimen 9 and be positioned over the indoor 1 of 20～30 DEG C～dry for 7 days, after drying, seen by thin
The microscopical structure of visual device observation coal test specimen 9 and metallographic structure change, analyze coal test specimen 9 and weaken and corrosion liquid 8, corrosion liquid 8
Temperature and the relation of flow regime of corrosion liquid 8；
3) Mechanics Performance Testing: take out coal test specimen 9 and carry out uniaxial compression test respectively, the indoor 1 of 20～30 DEG C～dry for 7 days
After carry out containing gas triaxial compression test；Taking-up coal sample 10 is after the indoor 6～24h of 20～30 DEG C are dried, and re-compacted shaped coal tries
Uniaxial compression test is carried out after part；By test coal test specimen 9 uniaxial compressive strength and containing gas triaxial shear strength change with
And the change of the moulded coal uniaxial compressive strength made after the abundant corrosion of coal sample 10, characterize different dissolution extent and different corrosion condition
In the case of the mechanics weakening characteristic of coal.
Supplementing as above-described embodiment, the pH value at modulation corrosion liquid 8 considers the distribution situation of different ature of coal component simultaneously,
The content of N and S can also be reduced, it is achieved the purifying use of the energy by the coal-fired component of this corrosion coal preparation method improvement, subtracts
The burden that environment is caused by few fire coal.
Last it should be noted that, the above is only technical scheme, rather than its protection domain is imposed any restrictions, all
It is the related amendments or equivalent carried out according to technical solution of the present invention, still falls within the protection domain of technical solution of the present invention.
Claims (2)
1. a corrosion coal preparation and physical mechanics weakening characteristic analysis test method, it is characterised in that the method includes
1) prepared by corrosion coal: by pH value be 4～10 configuration corrosion liquid (8), corrosion liquid (8) is put in corrosion case (1), opens
Dynamic heater (4) is heated to 20～70 DEG C to corrosion liquid (8), then by the coal test specimen (9) of a size of Φ 50mm × 100mm
It is respectively placed in corrosion liquid (8) with the coal sample (10) of 4～60 mesh and is submerged, building case lid (2), close with fluid sealant (3)
Envelope corrosion case (1) and the contact edge edge of case lid (2), open rotational flow generator (5), place 1～60 day；
Wherein, a side bottom of corrosion case (1) arranges heater (4), top arranges rotational flow generator (5), corrosion case (1)
Opposite side bottom liquid outlet (6) is set；Described case lid (2) can be together on corrosion case (1), and contact portion is in preparation corrosion
Fluid sealant (3) is used to seal, to completely cut off outside air during coal；Gate valve (7) is set on described liquid outlet (6)；
2) visual analysis is carefully seen: the coal test specimen (9) taking out a size of Φ 50mm × 100mm is positioned over the indoor 1～7 of 20～30 DEG C
It dries, then analyzes microscopical structure and metallographic structure change；
3) Mechanics Performance Testing: take out the coal test specimen (9) of a size of Φ 50mm × 100mm carry out respectively uniaxial compression test,
The indoor 1 of 20～30 DEG C～carry out containing gas triaxial compression test after drying for 7 days；Take out the coal sample (10) of 4～60 mesh at 20～30 DEG C
Indoor 6～24h dry after be pressed into moulded coal test specimen, then carry out uniaxial compression test, test mechanical property change.
A kind of corrosion coal preparation the most according to claim 1 and physical mechanics weakening characteristic analysis test method, it is characterised in that
Described corrosion liquid (8) is by HF, HCl, H2SO4、KHSO4Or HNO3Configuration PH is the solution of 4～7, or by NaOH
Or the solution that KOH configuration PH is 7～10.
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| CN105928751B CN105928751B (en) | 2018-07-17 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB191106762A (en) * | 1910-03-18 | 1911-08-17 | Bernhard Schiller | An Improved Machine for Testing Materials. |
| US20100139378A1 (en) * | 2008-12-05 | 2010-06-10 | Schlumberger Technology Corporation | Method for determination of pore water content in equilibrium with gas hydrate in dispersed media |
| CN102435716A (en) * | 2011-09-14 | 2012-05-02 | 中国石油天然气股份有限公司 | Diagenesis simulation experiment device |
| US20150047418A1 (en) * | 2013-02-13 | 2015-02-19 | Porous Materials, Inc. | Determination of pore structure characteristics of absorbent materials under compression |
| CN104459055A (en) * | 2014-12-19 | 2015-03-25 | 中国石油大学(华东) | Experimental device for high temperature and high pressure anti-corrosion reaction |
| CN105181930A (en) * | 2015-09-07 | 2015-12-23 | 中国地质大学（北京） | Method and device for measuring chemical reaction and physical change of oil rock and water rock |
| CN105403497A (en) * | 2015-12-08 | 2016-03-16 | 中国石油天然气股份有限公司 | Core permeability evolution simulation method and system |
-
2016
- 2016-04-11 CN CN201610225601.1A patent/CN105928751B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191106762A (en) * | 1910-03-18 | 1911-08-17 | Bernhard Schiller | An Improved Machine for Testing Materials. |
| US20100139378A1 (en) * | 2008-12-05 | 2010-06-10 | Schlumberger Technology Corporation | Method for determination of pore water content in equilibrium with gas hydrate in dispersed media |
| CN102435716A (en) * | 2011-09-14 | 2012-05-02 | 中国石油天然气股份有限公司 | Diagenesis simulation experiment device |
| US20150047418A1 (en) * | 2013-02-13 | 2015-02-19 | Porous Materials, Inc. | Determination of pore structure characteristics of absorbent materials under compression |
| CN104459055A (en) * | 2014-12-19 | 2015-03-25 | 中国石油大学(华东) | Experimental device for high temperature and high pressure anti-corrosion reaction |
| CN105181930A (en) * | 2015-09-07 | 2015-12-23 | 中国地质大学（北京） | Method and device for measuring chemical reaction and physical change of oil rock and water rock |
| CN105403497A (en) * | 2015-12-08 | 2016-03-16 | 中国石油天然气股份有限公司 | Core permeability evolution simulation method and system |
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| CN105928751B (en) | 2018-07-17 |
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