CN110082228A - A kind of the Hopkinson impact experiment apparatus and method of coal containing methane gas - Google Patents
A kind of the Hopkinson impact experiment apparatus and method of coal containing methane gas Download PDFInfo
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- CN110082228A CN110082228A CN201910124312.6A CN201910124312A CN110082228A CN 110082228 A CN110082228 A CN 110082228A CN 201910124312 A CN201910124312 A CN 201910124312A CN 110082228 A CN110082228 A CN 110082228A
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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
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/307—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated by a compressed or tensile-stressed spring; generated by pneumatic or hydraulic means
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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
- G01N2203/0001—Type of application of the stress
- G01N2203/001—Impulsive
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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
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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Abstract
The present invention is a kind of coal containing methane gas Hopkinson impact experiment apparatus and method, is made of confining pressure cylinder cylinder body, oil resistant rubber set, gas vent, the pressure-bearing fixed block with gas flowing groove, inflation pipe fitting and pressure gauge, high pressure oil pipe fitting and pressure gauge；Wherein half block is connect with inflation pipe fitting on the pressure-bearing fixed block with gas flowing groove, it is internal that pressure-bearing fixed block is wrapped in oil resistant rubber set, oil resistant rubber set is connect with confining pressure cylinder inboard wall of cylinder block, connection high pressure oil pipe fitting and pressure gauge below confining pressure cylinder cylinder body, device is connected on Hopkinson pressure bar, the pressure oil of certain pressure is injected into confining pressure cylinder cylinder body, injects gas into the region of oil resistant rubber set package, after sample adsorption gas, start impact test.The invention solves the research of influence of the confining pressure to sample and the influence containing gas to sample simultaneously, and apparatus structure is simple, reasonable design, easy operation, can improve the success rate of experiment, has stronger practicability.
Description
Technical field
The invention belongs to gas adsorption desorption and the Impulsive load experimental technique fields of material dynamic mechanical performance, specifically relate to
And it is a kind of for coal containing methane gas Hopkinson impact experiment apparatus and method.
Background technique
With underground engineering under stress state high strain-rate dynamic mechanical there is an urgent need to the dynamic mechanicals of material
The research of performance increasingly attracts people's attention, it has been proposed that a series of impacts for being exclusively used in test material dynamic mechanical
Loading device, Hopkinson pressure bar becomes applies material Large strain mechanical property experiment device the most universal at present, wherein dividing
From formula Hopkinson pressure bar because its structure is simple, operating cost is cheap to be had been widely used.Split hopkinson bar is
Study the experimental provision of material dynamic mechanical performance under one-dimensional stress state.Current split hopkinson bar experimental provision is
Through there is big improvement, still, most material is also carried by passive radial in use not only by axial dynamic loading
The effect of lotus (confining pressure), therefore become by mechanics influence of the axial dynamic loading to material must for material in the case of studying confining pressure
So.In addition a certain amount of gas is usually contained inside underground coal mine, coal body, the presence of gas also has the mechanical property of coal body
Important influence, when Hopkinson pressure bar experiment sample when containing coal, it is contemplated that the presence of gas is to coal body power in actual conditions
Learn the influence of performance.The some Hopkinson pressure bar confining pressure devices occurred currently on the market, only solve Hopkinson pressure bar
The problem of radial load (confining pressure) is studied in experiment, there is no solve the problems, such as that coal body sample is gassy.
For the limitation and deficiency of the prior art, the present invention proposes the active confining pressure and absorption watt of a kind of Hopkinson pressure bar
The experimental provision and method of this experiment, it is simple and reliable for structure, it both can solve Hopkinson pressure bar experiment sample and (enclosed by radial load
Pressure) the problem of influencing research, while can solve the problem of gas is to sample Effect on Mechanical Properties in coal body in sample containing coal again
Research.
Summary of the invention
The object of the present invention is to provide one kind both can solve in Hopkinson pressure bar experiment to experimental sample by radial load
The research of the problem of lotus (confining pressure), and can solve the problem of gas is to sample Effect on Mechanical Properties in coal body in sample containing coal
One kind of research is used for coal containing methane gas Hopkinson impact experiment apparatus and method.
The technical solution of use:
One kind be used for coal containing methane gas Hopkinson impact experiment apparatus, by confining pressure cylinder cylinder body, oil resistant rubber set, gas vent,
Pressure-bearing fixed block with gas flowing groove, inflation pipe fitting and pressure gauge, high pressure oil pipe fitting and pressure gauge composition；Wherein: band gas
The pressure-bearing fixed block of flowing groove is that a pair is clamped in inc hollow semi-cylinders body metal block on Hopkinson bar and sample, often
A fixed block is flowed in the gas flowing groove that bottom cutting intersects for methane gas, and upper half fixed block is connect with inflation pipe fitting, is filled
Tracheae part and gas flowing groove connection simultaneously extend to outside confining pressure cylinder and connect pressure gauge, and the fixation of pressure-bearing fixed block is wrapped in oil resistant
Inside rubber sleeve, inflation pipe fitting and oil resistant rubber cover contact site airtight connection, and oil resistant rubber set is close with confining pressure cylinder inboard wall of cylinder block
Connection is closed, gas vent, connection high pressure oil pipe fitting and pressure gauge below confining pressure cylinder cylinder body are opened up above confining pressure cylinder cylinder body.
One kind being used for coal containing methane gas Hopkinson impact experiment method, which comprises the following steps:
Step 1: split hopkinson press bar and sample assembly and adjustment are finished, and the main body of this experimental provision is connected
Onto compression bar and sample；
Step 2: inflation pipe fitting is connected into gas cylinder, high pressure oil pipe fitting is connected into pressure oil vessel；
Step 3: opening the gas vent of confining pressure cylinder cylinder body, starts the injection pressure oil into confining pressure cylinder cylinder body, when pressure oil is infused
When to gas vent aperture, gas vent is closed, continues the injection pressure oil into cylinder body, when being charged to pressure needed for testing, stops note
(at this time under the action of pressure oil, oil resistant rubber covers the closed incident bar and transmission bar for being wrapped in Hopkinson pressure bar to oil
Both ends, pressure-bearing fixed block is also fixed to accommodate in incident bar and transmission bar both ends, and generates active confining pressure to sample)；
Step 4: vacuum will be evacuated in the region of oil resistant rubber set package；
Step 5: it is covered in package region to oil resistant rubber and injects gas, stop gas injection when being charged to pressure needed for testing, stood
A period of time waits sample adsorption gas to finish, and can start to carry out Hopkinson pressure bar impact test；
Step 6: laying down high pressure oil after experiment, takes out sample.
The beneficial effects of the present invention are:
Apparatus structure is simple, reasonable design, easy operation, realizes confining pressure condition and gas absorption simultaneously in a device
Condition can accurately grip sample, reduce experimental error, and sealing is simple and reliable, improves the success rate of experiment, extend equipment
Service life.
Detailed description of the invention
Fig. 1 is a kind of just to cut open structural schematic diagram for coal containing methane gas Hopkinson impact experiment apparatus；
Fig. 2 is a kind of side structure schematic view for coal containing methane gas Hopkinson impact experiment apparatus；
In figure, 1-confining pressure cylinder cylinder body；2-oil resistant rubber sets；3-pressure-bearing the fixed blocks with gas flowing groove；4-exhausts
Hole；5-inflation pipe fittings；6-high pressure oil pipe fittings；7-pressure gauges；8-incident bars；9-transmission bars；10-samples.
Specific embodiment
The present invention will be described in detail with reference to the accompanying drawings and embodiments:
One kind being used for coal containing methane gas Hopkinson impact experiment apparatus, covers 2, gas vent by confining pressure cylinder cylinder body 1, oil resistant rubber
4, the pressure-bearing fixed block 3 with gas flowing groove, inflation pipe fitting 5 and pressure gauge 7, high pressure oil pipe fitting 6 and pressure gauge 7 form, band gas
The upper half fixed block of the pressure-bearing fixed block 3 of body flowing groove is connect with inflation pipe fitting 5, and inflation pipe fitting 5 and gas flowing groove connection are simultaneously
It extends to 1 outside of confining pressure cylinder and connects pressure gauge 7, pressure-bearing fixed block is fixed 3 and is wrapped in inside oil resistant rubber set 2, and pipe fitting 5 is inflated
2 contact site airtight connections, oil resistant rubber set 2 and 1 inner wall airtight connection of confining pressure cylinder cylinder body, confining pressure cylinder cylinder body are covered with oil resistant rubber
1 top opens up gas vent 4, connects high pressure oil pipe fitting 6 and pressure gauge 7 below confining pressure cylinder cylinder body 1.
Load active confining pressure described in the present embodiment and the method following steps of adsorption gas experiment carry out:
Step 1: the main body of this experimental provision is connected on the incident bar of split hopkinson press bar, debugging separation
The center of experimental provision between incident bar and transmission bar, is moved to clamping sample by sample holder by formula Hopkinson pressure bar
Position；
Step 2: by gas gas cylinder, pipe fitting 5 is connect, hydraulic press and high pressure oil pipe fitting 6 connect with inflation；
Step 3: opening the gas vent 4 of confining pressure cylinder cylinder body 1, starts the injection pressure oil into confining pressure cylinder cylinder body 1, works as pressure
When at oil note to 4 aperture of gas vent, gas vent 4 is closed, continues the injection pressure oil into cylinder body 1, is connected when high pressure oil pipe fitting 6
When the reading of pressure gauge 7 is 5MPa, stop oiling, at this time confining pressure loaded；
Step 4: vacuum machine is connected on inflation pipe fitting 5, the region that pumping oil resistant rubber set 2 wraps up to vacuum；
Step 5: gas is injected into 2 package region of oil resistant rubber set, the blowing pressure stops gas injection when being 1MPa, stand 8
Or so a hour waits sample adsorption gas to finish, and can start to carry out Hopkinson pressure bar impact test；
Step 6: laying down high pressure oil after experiment, takes out sample.
Claims (3)
1. a kind of coal containing methane gas Hopkinson impact experiment apparatus and method, by confining pressure cylinder cylinder body, oil resistant rubber set, gas vent,
Pressure-bearing fixed block with gas flowing groove, inflation pipe fitting and pressure gauge, high pressure oil pipe fitting and pressure gauge composition, it is characterised in that:
High pressure oil provides pressure, and pressure-bearing fixed block contact sample and incident bar and transmission bar with gas flowing groove are played to sample
The effect of confining pressure and fixed sample, oil resistant rubber covers after by oil pressure, closed to be wrapped in incident bar and transmission bar both ends, rises
To closed effect.
2. a kind of pressure-bearing with gas flowing groove of coal containing methane gas Hopkinson impact experiment apparatus according to claim 1
Fixed block is clamped in the inc hollow semi-cylinders body metal block on incident bar and transmission bar and sample, Mei Gegu for a pair
Determine block in internal cutting gas flowing groove that is longitudinal and axially intersecting, upper half fixed block connect with inflation pipe fitting, inflate pipe fitting and
Gas flowing groove connection guarantees to generate the fixed sample of confining pressure simultaneously, and can guarantee sample adsorption gas.
3. a kind of coal containing methane gas Hopkinson impact experiment method according to claim 1, which is characterized in that including following
Step:
Step 1: split hopkinson press bar and sample assembly and adjustment are finished, and the main body of this experimental provision is connected to pressure
On bar and sample；
Step 2: inflation pipe fitting is connected into gas cylinder, high pressure oil pipe fitting is connected into pressure oil vessel；
Step 3: opening the gas vent of confining pressure cylinder cylinder body, starts the injection pressure oil into confining pressure cylinder cylinder body, when pressure oil is infused to row
When at pore openings, gas vent is closed, continues the injection pressure oil into cylinder body, when being charged to pressure needed for testing, stops oiling (this
When under the action of pressure oil, oil resistant rubber covers the closed incident bar for being wrapped in Hopkinson pressure bar and transmission bar both ends,
Pressure-bearing fixed block is also fixed to accommodate in incident bar and transmission bar both ends, and generates active confining pressure to sample)；
Step 4: vacuum will be evacuated in the region of oil resistant rubber set package；
Step 5: it is covered in package region to oil resistant rubber and injects gas, stop gas injection when being charged to pressure needed for testing, stand one section
Time waits sample adsorption gas to finish, and can start to carry out Hopkinson pressure bar impact test；
Step 6: laying down high pressure oil after experiment, takes out sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910124312.6A CN110082228A (en) | 2019-02-18 | 2019-02-18 | A kind of the Hopkinson impact experiment apparatus and method of coal containing methane gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910124312.6A CN110082228A (en) | 2019-02-18 | 2019-02-18 | A kind of the Hopkinson impact experiment apparatus and method of coal containing methane gas |
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| CN110082228A true CN110082228A (en) | 2019-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910124312.6A Pending CN110082228A (en) | 2019-02-18 | 2019-02-18 | A kind of the Hopkinson impact experiment apparatus and method of coal containing methane gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113281175A (en) * | 2021-04-23 | 2021-08-20 | 中南大学 | Device and method for testing dynamic mechanical properties of rock in gas-solid coupling state |
| WO2023193469A1 (en) * | 2022-11-30 | 2023-10-12 | 安徽理工大学 | Gas pressure maintaining split hopkinson pressure bar confining pressure device and usage method therefor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202837089U (en) * | 2012-09-29 | 2013-03-27 | 张磊 | Confinement cylinder device of Hopkinson pressure bar active confinement experiment |
| CN103323328A (en) * | 2013-07-09 | 2013-09-25 | 安徽理工大学 | Gas sealing device and test method for coal rock impact test |
| CN103743665A (en) * | 2014-01-06 | 2014-04-23 | 安徽理工大学 | Loading device for simulating stress of coal rock |
| CN104865176A (en) * | 2015-05-27 | 2015-08-26 | 河南理工大学 | Seepage experiment system and method for gas-containing coal under action of impact load |
-
2019
- 2019-02-18 CN CN201910124312.6A patent/CN110082228A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202837089U (en) * | 2012-09-29 | 2013-03-27 | 张磊 | Confinement cylinder device of Hopkinson pressure bar active confinement experiment |
| CN103323328A (en) * | 2013-07-09 | 2013-09-25 | 安徽理工大学 | Gas sealing device and test method for coal rock impact test |
| CN103743665A (en) * | 2014-01-06 | 2014-04-23 | 安徽理工大学 | Loading device for simulating stress of coal rock |
| CN104865176A (en) * | 2015-05-27 | 2015-08-26 | 河南理工大学 | Seepage experiment system and method for gas-containing coal under action of impact load |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113281175A (en) * | 2021-04-23 | 2021-08-20 | 中南大学 | Device and method for testing dynamic mechanical properties of rock in gas-solid coupling state |
| WO2023193469A1 (en) * | 2022-11-30 | 2023-10-12 | 安徽理工大学 | Gas pressure maintaining split hopkinson pressure bar confining pressure device and usage method therefor |
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