CN107655762A - A kind of composed coal and rock Burst Tendency experiment simulator and method - Google Patents
A kind of composed coal and rock Burst Tendency experiment simulator and method Download PDFInfo
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- CN107655762A CN107655762A CN201710862482.5A CN201710862482A CN107655762A CN 107655762 A CN107655762 A CN 107655762A CN 201710862482 A CN201710862482 A CN 201710862482A CN 107655762 A CN107655762 A CN 107655762A
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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
- G01N3/14—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by dead weight, e.g. pendulum; generated by springs tension
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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
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0035—Spring
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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Abstract
A kind of composed coal and rock Burst Tendency experiment simulator, it is mainly made up of stored energy mechanism and position-limit mechanism two parts, stored energy mechanism includes sample plummer, base and strength energy-stored spring, position-limit mechanism includes stop nut and guide rod, the guide rod for passing perpendicularly through sample plummer is provided with base, guide rod is arranged in a ring along perimeter, sample plummer can slide up and down along guide rod, strength energy-stored spring is enclosed on outside guide rod, guide rod upper end is threaded, it is screwed with the stop nut for Control Assay plummer scope of activities, place experiment coal sample in sample plummer top center position, the decrement of strength energy-stored spring in the vertical displacement meter measurement experiment arranged between base and sample plummer.The present invention by energy storing structure simulate rock sample mechanical characteristics, can quantitative study rock sample release elasticity can size, for accurate evaluation rock sample on coal sample impact failure influence scientific basis is provided.Present invention also offers the application method of above-mentioned experimental provision.
Description
Technical field
The invention belongs to composed coal and rock Burst Tendency research field, and in particular to a kind of composed coal and rock Burst Tendency examination
Test analogue means and method.
Background technology
Bump is a kind of typical mine coal rock dynamic disaster phenomenon, and the sudden and violent destruction that it occurs is special
Levy and very big threat is formed to mine safety, as the increase of coal mining depth, bump problem are more and more prominent.Coal petrography
The ability of impact failure, referred to as Burst Tendency are produced, it is a kind of build-in attribute of coal and rock.Bump is top bottom
The power and energy of plate, coal seam under the stress of primary rock and mine mining induced stress collective effect are discontinuously transmitted and cause displacement deformation not
Continuous result.Its occur it is not only simple depend on coal seam, the Burst Tendency of rock stratum, architectural feature more with coal rock layer,
Combining form has close relationship.
Domestic and foreign scholars have carried out substantial amounts of experimental study to composed coal and rock Burst Tendency at present, as Dou Linming et al. exists
" mining with safety engineering journal " in March, 2006, volume 23, the 1st phase, " the composed coal and rock Burst Tendency characteristic on P43-46
Experimental study ".Past frequently with test method be selection coal petrography sample at the scene, coal petrography sample is processed by the method for rock drilling core
Into a diameter of 50mm standard specimen, rock sample and coal sample are combined into height by coal petrography sample with super glue by different proportion is
100mm standard specimen, then by load test, so as to obtain the Burst Tendency of composed coal and rock.But due to testing rock
Some live point is taken from, the defects of including crack, joint, hole, moisture content, these defects can have a strong impact on examination during experiment
Test result.In addition in the experiment of composed coal and rock Burst Tendency, can not quantitative study rock sample release energy how many, and to coal sample
The influence of impact failure.
The content of the invention
For above-mentioned technical problem, it is an object of the invention to provide a kind of composed coal and rock Burst Tendency test simulation dress
Put, simple in construction, rock sample rigidity size is adjustable, rock sample releases energy big I quantitative study；Present invention also offers above-mentioned group
The experimental method of Coal Burst Tendency experiment simulator is closed, every impact desired value of composed coal and rock can be obtained, be defined
Really evaluation rock sample influences to provide scientific basis on coal sample impact failure.
The technical solution adopted by the present invention is as follows：
A kind of composed coal and rock Burst Tendency experiment simulator, it is mainly by stored energy mechanism and position-limit mechanism two parts group
Into the stored energy mechanism includes sample plummer, base and strength energy-stored spring, and the position-limit mechanism includes stop nut and led
To bar, the guide rod for passing perpendicularly through sample plummer is provided with the base, the guide rod is arranged in a ring along perimeter
Row, the sample plummer can be slided up and down along guide rod, and the strength energy-stored spring is enclosed on outside guide rod, strength energy storage bullet
Spring upper end is acted against below sample plummer, by stop nut stationary positioned, strength energy-stored spring lower end by base stationary positioned,
The guide rod upper end is threaded, and is screwed with stop nut, for Control Assay plummer scope of activities, the sample carrying
Place experiment coal sample in platform top center position.
Composed coal and rock Burst Tendency experiment simulator of the present invention, wherein, the number of the strength energy-stored spring
Mesh is adjustable, and the number n of required strength energy-stored spring is according to the rigidity k of rock sample and the rigidity k of a strength energy-stored spring1Obtain：n
=k/k1。
Composed coal and rock Burst Tendency experiment simulator of the present invention, wherein, the number of the strength energy-stored spring
Mesh should ensure that sample plummer stress balance, and the optional scopes of number n of strength energy-stored spring are 4,6,8.
Composed coal and rock Burst Tendency experiment simulator of the present invention, wherein, the height of the strength energy-stored spring
Degree is less than the height of the guide rod, and the internal diameter of the strength energy-stored spring is more than the external diameter of the guide rod.
Composed coal and rock Burst Tendency experiment simulator of the present invention, wherein, the base and the sample are held
Displacement meter is provided between microscope carrier.
Composed coal and rock Burst Tendency test simulation method of the present invention, uses combinations thereof Coal Burst Tendency
Experiment simulator carries out Burst Tendency experiment to composed coal and rock, comprises the following steps：
(a) the rigidity k of rock sample is determined, original coal petrography sample is chosen from scene, a diameter of 50mm height is processed into laboratory
For 100mm certified reference coal and rock sample, tested by rock sample mechanics parameter, obtain the rigidity k of rock sample；
(b) the number n of the strength energy-stored spring is determined, according to the rigidity k of rock sample and a strength energy-stored spring
Rigidity k1Obtain：N=k/k1, n can only round numbers, can only be 4,6,8 and in order to ensure the sample plummer stress balance
Middle value；
(c) assembling test device, strength energy-stored spring described in n roots is enclosed on outside the corresponding guide rod, puts institute
Sample plummer is stated, screws on the stop nut, the experiment coal sample is placed in the sample plummer top center position；
(d) loading procedure, the coal sample is loaded by rock mechanics experiment machine, the sample plummer is along institute
Guide rod to be stated to move downward, the strength energy-stored spring is in compressive state, as load constantly increases, the strength energy storage bullet
Spring is constantly compressed, while stores elasticity energy caused by compression, when load reaches the strength degree of the coal sample, the coal sample
Destroy, the great number of elastic energy instantaneous relase being at this moment stored in the strength energy-stored spring, the sample plummer along
Guide rod moves upwards, exacerbates the Burst Tendency of coal sample.
Compared with the prior art, beneficial effect of the present invention is presented as：
1) composed coal and rock Burst Tendency experiment simulator of the present invention and method, due to using strength energy storage bullet
Spring simulates the mechanical characteristic of rock sample, can eliminate due to the defects of experiment rock includes crack, joint, hole, moisture content, examination
These defects influence to caused by result of the test when testing.
2) composed coal and rock Burst Tendency experiment simulator of the present invention and method, due to being held in base and sample
Vertical displacement meter is disposed between microscope carrier, the decrement of strength energy-stored spring in experiment can be measured, therefore, the present invention can be accurate
Rock sample is really obtained to release energy influence degree of the size to coal sample Burst Tendency.
3) composed coal and rock Burst Tendency experiment simulator of the present invention and method, due to during experiment,
The number of strength energy-stored spring is adjustable, and therefore, the present invention can simulate the mechanics parameter of different rock samples.
Composed coal and rock Burst Tendency experiment simulator of the present invention and method, simple in construction, easy to operate, rock
Big I quantitative study that sample rigidity size is adjustable, rock sample releases energy.
Brief description of the drawings
Fig. 1 is a kind of composed coal and rock Burst Tendency experiment simulator structural perspective of the present invention；
Fig. 2 is a kind of composed coal and rock Burst Tendency experiment simulator profile of the present invention；
Fig. 3 is a kind of composed coal and rock Burst Tendency experiment simulator center base top view of the present invention；
Wherein, base vertical view when (a) is the number n=4 of strength energy-stored spring；(b) it is the number n of strength energy-stored spring
Base vertical view when=6；(c) be strength energy-stored spring number n=8 when base vertical view；
In figure：1- sample plummers, 2- bases, 3- stop nuts, 4- guide rods, 5- strength energy-stored springs, 6- coal samples, 7-
Displacement meter.
Embodiment
The specific embodiment of the invention is described further below in conjunction with the accompanying drawings：
As depicted in figs. 1 and 2, a kind of composed coal and rock Burst Tendency experiment simulator, its mainly by stored energy mechanism and
Position-limit mechanism two parts form；The stored energy mechanism includes sample plummer 1, base 2 and strength energy-stored spring 5, sample carrying
Platform 1 and base 2 are circular steel plate；The position-limit mechanism includes stop nut 3 and guide rod 4；It is provided with the base 2 vertical
Direct puncture crosses the guide rod 4 of sample plummer 1, and the sample plummer 1 can slide up and down along guide rod 4；The strength energy storage bullet
Spring 5 is enclosed on outside guide rod 4, and the upper end of strength energy-stored spring 5 is acted against below sample plummer 1, and it is fixed to be fixed by stop nut 3
Position, the lower end of strength energy-stored spring 5 is by the stationary positioned of base 2；The upper end of guide rod 4 is threaded, and is screwed with stop nut 3,
For Control Assay plummer scope of activities, experiment coal sample 6 is placed in the top center position of sample plummer 1；The base 2
Displacement meter 7 is provided between the sample plummer 1, for recording the decrement of strength energy-stored spring 5.
As shown in figure 3, the guide rod 4 is arranged in a ring along the periphery of base 2, the number root of the strength energy-stored spring 5
Adjustable according to test requirements document, the number n of required strength energy-stored spring 5 is firm according to the rigidity k of rock sample and strength energy-stored spring 5
Spend k1Obtain：N=k/k1；The number of the strength energy-stored spring 5 should ensure that the stress balance of sample plummer 1, strength energy storage bullet
The optional scopes of number n of spring 5 are 4,6,8.The height of the strength energy-stored spring 5 is less than the height of the guide rod 4, described strong
The internal diameter of power energy-stored spring 5 is more than the external diameter of the guide rod 4.
Burst Tendency is carried out to composed coal and rock using the composed coal and rock Burst Tendency experiment simulator of the present embodiment
Experiment, comprises the following steps：
(a) the rigidity k of rock sample is determined, original coal petrography sample is chosen from scene, a diameter of 50mm is processed into laboratory, height
For 100mm certified reference coal 6 and rock sample, tested by rock sample mechanics parameter, obtain the rigidity k of rock sample；
(b) the number n of the strength energy-stored spring 5 is determined, according to the rigidity k of rock sample and a strength energy-stored spring
5 rigidity k1Obtain：N=k/k1, n can only round numbers, and in order to ensure the stress balance of sample plummer 1, can only 4,6,
Value in 8；
(c) assembling test device, strength energy-stored spring 5 described in n roots is enclosed on outside the corresponding guide rod 4, put
The sample plummer 1, the stop nut 3 is screwed on, stop nut 3 contacts that the upper surface of sample plummer 1 is advisable with rigid connection,
The experiment coal sample 6 is placed in the top center position of sample plummer 1, and displacement meter 7, position are set between base 2 and sample plummer 1
Meter 7 is moved to be fixed on directly over the center of base 2, and the thimble top of displacement meter 7 is to below sample plummer 1, in displacement meter 7
Heart line is vertical with base 2；
(d) loading procedure, the coal sample 6 is loaded by rock mechanics experiment machine, it is described under load effect
Sample plummer 1 moves downward along the guide rod 4, and the strength energy-stored spring 5 is in compressive state, as load is continuous
Increase, the strength energy-stored spring 5 are constantly compressed, while store elasticity energy caused by compression, when load reaches the coal
The strength degree of sample 6, coal sample 6 are destroyed, and the great number of elastic being at this moment stored in the strength energy-stored spring 5 can be released instantaneously
Put, the sample plummer 1 moves upwards along guide rod 4, the Burst Tendency of the coal sample 6 is exacerbated, according to displacement meter 7
Record maximum can calculate strength energy-stored spring 5 and release energy size.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
Enclose and be defined, on the premise of design spirit of the present invention is not departed from, technical side of the those of ordinary skill in the art to the present invention
The various modifications and improvement that case is made, it all should fall into the protection domain of claims of the present invention determination.
Claims (6)
- A kind of 1. composed coal and rock Burst Tendency experiment simulator, it is characterised in that：It is mainly by stored energy mechanism and position restrainer Structure two parts form, and the stored energy mechanism includes sample plummer (1), base (2) and strength energy-stored spring (5), described spacing Mechanism includes stop nut (3) and guide rod (4), and the guiding for passing perpendicularly through sample plummer (1) is provided with the base (2) Bar (4), the guide rod (4) is arranged in a ring along perimeter, and the sample plummer (1) can be glided along guide rod (4) Dynamic, the strength energy-stored spring (5) is enclosed on guide rod (4) outside, and strength energy-stored spring (5) upper end acts against sample plummer (1) below, by stop nut (3) stationary positioned, strength energy-stored spring (5) lower end is by base (2) stationary positioned, the guide rod (4) upper end is threaded, and is screwed with stop nut (3), for Control Assay plummer scope of activities, the sample plummer (1) experiment coal sample (6) is placed in top center position.
- A kind of 2. composed coal and rock Burst Tendency experiment simulator according to claim 1, it is characterised in that：It is described strong The number of power energy-stored spring (5) is adjustable, and the number n of required strength energy-stored spring (5) stores up according to the rigidity k of rock sample and a strength The rigidity k of energy spring (5)1Obtain：N=k/k1。
- A kind of 3. composed coal and rock Burst Tendency experiment simulator according to claim 1, it is characterised in that：It is described strong The number of power energy-stored spring (5) should ensure that sample plummer (1) stress balance, the optional models of number n of strength energy-stored spring (5) Enclose for 4,6,8.
- A kind of 4. composed coal and rock Burst Tendency experiment simulator according to claim 1, it is characterised in that：It is described strong The height of power energy-stored spring (5) is less than the height of the guide rod (4), and the internal diameter of the strength energy-stored spring (5) is more than described The external diameter of guide rod (4).
- A kind of 5. composed coal and rock Burst Tendency experiment simulator according to claim 1, it is characterised in that：The bottom Displacement meter (7) is provided between seat (2) and the sample plummer (1).
- A kind of 6. composed coal and rock Burst Tendency test method, it is characterised in that：Usage right requires a kind of combination described in 1-5 Coal Burst Tendency experiment simulator carries out Burst Tendency experiment to composed coal and rock, comprises the following steps：(a) the rigidity k of rock sample is determined, chooses original coal petrography sample from scene, a diameter of 50mm is processed into laboratory is highly 100mm certified reference coal (6) and rock sample, is tested by rock sample mechanics parameter, obtains the rigidity k of rock sample；(b) the number n of the strength energy-stored spring (5) is determined, according to the rigidity k of rock sample and a strength energy-stored spring (5) rigidity k1Obtain：N=k/k1, n can only round numbers, and in order to ensure sample plummer (1) stress balance, Zhi Neng 4th, value in 6,8；(c) assembling test device, strength energy-stored spring (5) described in n roots is enclosed on corresponding guide rod (4) outside, put The sample plummer (1), screws on the stop nut (3), and the examination is placed in sample plummer (1) the top center position Test coal sample (6)；(d) loading procedure, the coal sample (6) is loaded by rock mechanics experiment machine, the sample plummer (1) along The guide rod (4) moves downward, and the strength energy-stored spring (5) is in compressive state, described strong as load constantly increases Power energy-stored spring (5) is constantly compressed, while stores elasticity energy caused by compression, when load reaches the strong of the coal sample (6) The limit is spent, coal sample (6) is destroyed, the great number of elastic energy instantaneous relase being at this moment stored in the strength energy-stored spring (5), institute State sample plummer (1) to move upwards along guide rod (4), exacerbate the Burst Tendency of the coal sample (6).
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108620618A (en) * | 2018-05-07 | 2018-10-09 | 刘延昌 | A kind of processing drilling device for the safe handling for preventing scrap iron from splashing |
| CN108731899A (en) * | 2018-05-25 | 2018-11-02 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Big load automatic releasing mechanism |
| CN109269902A (en) * | 2018-09-19 | 2019-01-25 | 山东科技大学 | A kind of load rigidity is adjustable rock mechanics testing system and test method |
| CN109406022A (en) * | 2018-05-25 | 2019-03-01 | 苏州博之盾防护技术有限公司 | A kind of shank force test device of simulated explosion impact |
| CN109406074A (en) * | 2018-11-15 | 2019-03-01 | 中车石家庄车辆有限公司 | Separator for spring elastic measuring head |
| CN111208272A (en) * | 2020-01-13 | 2020-05-29 | 中煤科工集团重庆研究院有限公司 | Deep well outburst simulation experiment method and rigidity regulation and control device |
| CN111721562A (en) * | 2020-06-05 | 2020-09-29 | 扬力集团股份有限公司 | Energy testing device for press |
| CN112577896A (en) * | 2020-12-12 | 2021-03-30 | 江西洪都航空工业集团有限责任公司 | Detection device for thin skin bulging phenomenon |
| CN113624593A (en) * | 2021-10-11 | 2021-11-09 | 煤炭科学研究总院 | Dynamic and static load impact test device and method for simulating dip angle-containing coal rock combination |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111208272A (en) * | 2020-01-13 | 2020-05-29 | 中煤科工集团重庆研究院有限公司 | Deep well outburst simulation experiment method and rigidity regulation and control device |
| CN111721562A (en) * | 2020-06-05 | 2020-09-29 | 扬力集团股份有限公司 | Energy testing device for press |
| CN112577896A (en) * | 2020-12-12 | 2021-03-30 | 江西洪都航空工业集团有限责任公司 | Detection device for thin skin bulging phenomenon |
| CN113624593A (en) * | 2021-10-11 | 2021-11-09 | 煤炭科学研究总院 | Dynamic and static load impact test device and method for simulating dip angle-containing coal rock combination |
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Application publication date: 20180202 |