CN203465159U - Impact loading test device for multi-field coupled coal rock - Google Patents

Impact loading test device for multi-field coupled coal rock Download PDF

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Publication number
CN203465159U
CN203465159U CN201320571367.XU CN201320571367U CN203465159U CN 203465159 U CN203465159 U CN 203465159U CN 201320571367 U CN201320571367 U CN 201320571367U CN 203465159 U CN203465159 U CN 203465159U
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pressure
static pressure
gas
axial static
sample
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CN201320571367.XU
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谢广祥
殷志强
王磊
胡祖祥
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Anhui University of Science and Technology
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Anhui University of Science and Technology
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Abstract

The utility model discloses an impact test device for coal rock in a multi-field coupled state. The test device comprises an axial static-pressure loading device, an axial static-pressure loading hydraulic oil pump, an axial static-pressure oil delivery pipe, an ambient-pressure loading hydraulic oil pump, an ambient-pressure loading oil delivery pipe, a radial ambient-pressure loading device, a gas tank, a gas inlet pipe, a gas pressure regulating valve, a sucking pump, a gas sensor, a gas outlet pipe, a cold-hot dual-purpose compressor, a servo oil pump, and a cold-hot dual-purpose oil delivery pipe. The test device can allow a coal-rock sample to be in a multi-field coupled state and since the test device can ensure that the coal-rock sample is in the coupled state of axial static load, radial ambient-pressure static load, gas pressure and temperature, a test can be performed on the condition of dynamic loading.

Description

Many coupling coal petrography impact loading experiment devices
Technical field
The utility model belongs to coal petrography mechanical property testing technical field, more specifically, relates to a kind of for simulating static stress, temperature, many couple state coal petrography impact loading experiment devices of gas adsorption.
Background technology
In the recovery process of underground coal resource, a large amount of use mechanization to combine to adopt cutting coal machine to coal petrography carry out fragmentation, goaf top plate cycle across fall and workplace near the work such as Blasting Excavation of rock gangway workplace coal and rock is brought to obvious dynamic impact problem disturbance, cause deep coal rock gas dynamic disaster frequent, serious harm miner life security, for the mechanism of further investigation deep coal rock gas dynamic disaster, need to explore the dynamic characteristics of coal petrography Shock Loading.These dynamic characteristics normally by experiment chamber carry out all kinds of impact experiments and obtain, at present application extensively and also the reliable impact experiment system of result be SHPB(split Hopkinson pressure bar, split hopkinson press bar) device, and improved various deformation device thus.
Numerous scholars think that the coal rock gas dynamic disaster in the coal exploitation process of deep is the coefficient result of physico mechanical characteristic by terrestrial stress, gas, ground temperature, exploitation disturbance, coal petrography.In traditional SHPB experiment, institute's test sample is often in room temperature be exposed among air, cause experimentation specimen temperature tested seasonal variations and change, in coal petrography, compose in the gas exposure air of depositing desorption of mash gas effect will occur simultaneously, cause methane gas in coal petrography sample to depart from, in sample, almost no longer contain methane gas.Yet, China's coal seam major part is the coal seam of containing the Permo-carboniferous period that enriches gas (being mainly methane CH4), continuous increase along with the coal resources back production degree of depth, coal and rock gas bearing capacity is also increase trend, unmind coal body in being rich in gas state, more than the gas pressure of deep under ground can reach 10MPa, in coal and rock, gas bearing capacity is far away higher than gas bearing capacity in traditional experiment sample; While is with the continuous increase of the exploitation of coal resources degree of depth, geotemperature increases with the speed of every 100 meters 3 degrees Celsius, the coal resources of the back production 1 km degree of depth of take are example, the temperature of its coal petrography itself can reach 40 degrees Celsius, increase with mining depth also will further be increased, and under gas bearing and hot conditions effect, the mechanical characteristic of coal petrography and traditional experiment result have bigger difference.Therefore, develop corresponding many coupling coal petrography impact loading devices, the crash characteristics carrying out under static stress, gas bearing, many, temperature field coupling condition has been tested the work of urgently carrying out into current coal petrography mechanics field.
The existing analogue experiment installation to deep resources of mines exploitation process medium power Disaster Study, mainly can divide following several: (1) dynamic and static year stress coupling, as sound is carried combination loading experimental apparatus, but such experimental provision, sample is exposed in air, cannot carry out coal and rock mechanical characteristic experiment under simulation gas environment; (2) gas-solid Environmental coupling, gas environment dynamics experimental device, such experimental provision, under static test-machine loading environment, carries out methane gas at the static quasistatic loading procedure of coal and rock, adsorption-desorption and seepage characteristic experiment.
Yet in the progress of coal mining of deep, coal and rock is born strong power disturbance, High-geotemperature and the high gas pressure acting in conjunction of high-ground stress static load, recovery process, it is subject to force mode is no longer independent static stress, dynamic loading, temperature or gas pressure effect, but multiple physical field coupling, this is that existing experimental provision and experimental technique could not be considered.Realize coal petrography multiple physical field coupled surge loading experiment, not only can make up existing coal petrography Experiments of Machanics method, and can provide coal petrography characterisitic parameter more accurately for the dynamic disaster research of deepen coal resource back production engineering.
Utility model content
The utility model is according to coal petrography occurrence status feature in deepen coal resource exploitation process, for existing coal petrography Experiments of Machanics method and apparatus, could not consider the defect of stress coupling and Gas-solid Coupling, provide a kind of coal petrography sample of realizing at many coupling conditions of terrestrial stress, energetic disturbance, gas bearing, ground temperature, many coupled surge loading experimental apparatus that more meet with engineering reality and method.
For solving the problems of the technologies described above, according to one side, a kind of many couple state impact experiment apparatus, comprise axial static pressure charger, axially static pressure loads hydraulic oil pump, axial static pressure petroleum pipeline, confined pressure loads hydraulic oil pump, confined pressure loads petroleum pipeline, confined pressure charger radially, gas gas tank, gas inlet pipe, gas pressure variable valve, aspiration pump, firedamp sensor, gas escape pipe, cold, hot two-purpose compressor, servo oil pump, cold, hot two-purpose petroleum pipeline, it is characterized in that: between the stress wave incident bar at the two ends of coal petrography sample and transmission bar, described axial static pressure charger is set, axial static pressure charger middle sample position arrange described in confined pressure charger radially, air admission hole and venthole are offered in incident bar and transmission bar center at sample two ends, be connected with gas escape pipe with gas inlet pipe respectively, gas inlet pipe is connected with gas gas tank by gas pressure variable valve, gas escape pipe is connected with aspiration pump by firedamp sensor, realizes experimentation sample in gas bearing environment, cold, hot two-purpose petroleum pipeline is set in confined pressure charger, by servo oil pump, is connected with cold, hot two-purpose compressor, realize sample experimentation temperature is controlled.
Described axial static pressure charger in experimental provision of the present utility model loads hydraulic oil pump by axial static pressure petroleum pipeline and axial static pressure and is connected, and realizes the axial static pressure of sample is loaded.
Described radially confined pressure charger in experimental provision of the present utility model loads petroleum pipeline by confined pressure and is connected with confined pressure loading hydraulic oil pump, realizes the radially static confined pressure of sample is loaded.
Experimental provision of the present utility model also comprises data acquisition system (DAS), and its two ends are connected with transmission bar with incident bar respectively by foil gauge, for gathering the stress wave signal of incident bar and transmission bar.
Experimental provision of the present utility model also comprises heat-shrink tube rubber sleeve, described sample surrounding except two ends is smeared to silica gel and be placed in heat-shrink tube rubber sleeve, guarantees sample and the isolation of confined pressure hydraulic oil, and sample two ends is alignd with incident bar and transmission bar axle center respectively.
Experimental provision of the present utility model also comprises heat-shrink tube rubber sleeve, described sample surrounding except two ends is smeared to silica gel and be placed in heat-shrink tube rubber sleeve, guarantees sample and the isolation of confined pressure hydraulic oil, and sample two ends is alignd with incident bar and transmission bar axle center respectively.
Experimental provision of the present utility model also comprises that the axial static pressure of incident end loads baffle plate, connecting rod, fixed screw, axially static pressure loads bunker O-ring seal, fixture splice on incident bar and transmission bar, wherein incident bar becomes convex with the fixture splice on transmission bar, outstanding position on incident bar is connected with the groove that the axial static pressure of incident end loads baffle plate centre, outstanding position on transmission bar loads oil pressure storehouse with axial static pressure and is connected, form hydraulic piston, the contact position that loads oil pressure storehouse and transmission bar at described axial static pressure is sealed by axial static pressure loading bunker O-ring seal respectively, axially static pressure loading oil pressure storehouse is connected by two connecting rods with the axial static pressure loading of incident end baffle plate, junction at described connecting rod and axial static pressure loading oil pressure storehouse and the axial static pressure loading of incident end baffle plate is fixed by fixed screw respectively, form the fixed frame of axial static pressure loading procedure, by axial static pressure petroleum pipeline and axial static pressure, loading hydraulic oil pump is connected, realization loads the axial static pressure of sample.
The utlity model has following beneficial effect: adopt many coupling coal petrography impact experiment apparatus of use of technique scheme, by axial static load device, can make coal petrography sample in axial static stress state; Confining pressure device, can make coal sample sample in confined pressure static stress state radially; Be arranged on the emptying aperture in sample two ends incident bar and transmission bar, be connected with aspiration pump with gas gas tank respectively, can make sample in certain gas bearing state; By the cold and hot petroleum pipeline being arranged in confining pressure device, be connected with cold, hot two-purpose compressor, can make sample in predetermined state of temperature; By mutually combining with SHPB device, can realize axial static load, radially under confined pressure static load, gas pressure, many couple states of temperature, impact dynamic load, simulate many couple state coal petrography shock stress ripple load modes, by many coupled characteristics of coal petrography sample, can reproduce more accurately the destruction characteristic that the on-the-spot coal and rock of underground coal back production is loaded by power.In the coal exploitation process of further research and probe deep, adopt disturbance and bring out coal and gas dynamical disaster mechanism, and then for deepen coal resource safety, efficiently back production provides theoretical foundation.
In sum, the utility model is that a kind of experimentation coal petrography sample of realizing is in many couple states, guarantee that coal petrography sample is in axial static load, radially confined pressure static load, gas pressure, temperature couple state, for the impact experiment apparatus of many couple states of coal petrography.
Accompanying drawing explanation
Fig. 1 is traditional SHPB structural representation.
Fig. 2 is the structural representation for static stress, shock vibration, gas bearing, many couple state coal petrography impact experiment apparatus of temperature according to an embodiment of the present utility model.
Fig. 3 is axial loading device structural representation.
Fig. 4 is according to the measured sample heating process temperature of temperature control equipment curve over time.
Fig. 5 is the signal collecting according to the data acquisition system (DAS) of the embodiment of Fig. 2.
Fig. 6 is the coal petrography that obtains according to the embodiment of Fig. 2 at axial static load 10MPa, the dynamic stress strain curve at 35 degrees Celsius of confined pressure 10MPa, methane gas 1MPa, temperature radially.
Number in the figure:
1-drift; 2-incident bar; 3-foil gauge; 4-sample; 5-transmission bar; 6-absorbing rod; 7-data acquisition system (DAS); 8-axial static pressure charger; 9-axially static pressure loads hydraulic oil pump; 10-axial static pressure petroleum pipeline; 11-confined pressure loads hydraulic oil pump; 12-confined pressure loads petroleum pipeline; 13-confined pressure charger radially; 14-heat-shrink tube rubber sleeve; 15-gas gas tank; 16-gas inlet pipe; 17-gas pressure variable valve; 18-aspiration pump; 19-firedamp sensor; 20-gas escape pipe; 21-cold, hot two-purpose compressor; 22-servopump; 23-cold, hot two-purpose woven hose; 24-axially static pressure loads oil pressure storehouse; The axial static pressure of 25-incident end loads baffle plate; 26-connecting rod; 27-fixed screw; 28-axially static pressure loads bunker O-ring seal 1; 29-axially static pressure loads bunker O-ring seal 2; Fixture splice on 30-incident bar and transmission bar.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is further described.
Referring to Fig. 2, show the structural representation for static stress, shock vibration, gas bearing, many couple state coal petrography impact experiment apparatus of temperature according to an embodiment of the present utility model.Compare the traditional SHPB structural representation shown in Fig. 1, Fig. 2 is that traditional SHPB loads the equipment schematic diagram after new equipment.
In Fig. 2, drift 1 is to incident bar 2 motions, incident bar 2, transmission bar 5, absorbing rod 6 conllinear, between the transmission bar of incident bar 2 and transmission bar 5, be provided with axial static pressure device 8 in many coupling experiment devices of sample, confining pressure device 13 radially, the radially interior placement sample 4 of confining pressure device 13, and sample 4 and incident bar 2, transmission bar 5, absorbing rod 6 conllinear.Incident bar 2, the interior foil gauge 3 that arranges respectively of transmission bar 5, twisted pair line connection is passed through with incident bar 2 and transmission bar 5 respectively by foil gauge 3 in the two ends of data acquisition system (DAS) 7.Axial static pressure device 8, wherein on incident bar 2 and transmission bar 5, near sample site, fixture splice 30 is set, 30 one-tenth convex of fixture splice, fixture splice 30 positions on incident bar 2 are connected with the groove that the axial static pressure of incident end loads baffle plate 25 centres, prominent fixture splice 30 positions on transmission bar 5 load oil pressure storehouse 24 with axial static pressure and are connected, form hydraulic piston, at described axial static pressure, loading oil pressure storehouse 24 is sealed by axial static pressure loading bunker O-ring seal 28 and 29 respectively with the contact position of transmission bar 5, axially static pressure loading oil pressure storehouse 24 is connected by two connecting rods 26 with the axial static pressure loading of incident end baffle plate 25, at described connecting rod 26 and axial static pressure loading oil pressure storehouse 24, by fixed screw 27, be fixed respectively with the junction that the axial static pressure of incident end loads baffle plate 25, form the fixed frame of axial static pressure loading procedure, by axial static pressure petroleum pipeline 10 and axial static pressure, loading hydraulic oil pump 9 is connected, realization loads the axial static pressure of sample.Radially confining pressure device 13 loads petroleum pipeline 12 and confined pressure by confined pressure and loads hydraulic oil pump 11 and be connected, realizes the radially static confined pressure loading to sample.Position at described incident bar 2 near sample 4, in incident bar 2 axle center, offering emptying aperture is connected with gas gas tank 15 with gas pressure variable valve 17 by gas inlet pipe 16, position at described transmission bar 5 near sample 4, in transmission bar 5 axle center, offer emptying aperture and be connected with aspiration pump 18 with firedamp sensor 19 by gas escape pipe 20, realize sample experimentation in gas bearing state.The specimen temperature control device being formed by cold, hot two-purpose compressor 21, servo oil pump 22, cold, hot two-purpose petroleum pipeline 23 in the described interior setting of radially confining pressure device 13, at the interior cold, hot two-purpose petroleum pipeline 23 that arranges of confining pressure device 13 radially, by servo oil pump 22, be connected with cold, hot two-purpose compressor 21, realize the temperature of sample experimentation and control.
Experimental technique for many couple state coal petrography impact experiment apparatus of the present utility model is as follows:
On the SHPB of many coupling devices device, test axial static load 10MPa, dynamic this structure of coal petrography under confined pressure 10MPa, methane gas 1MPa, temperature 35 degrees celsius radially.Certainly, use experimental provision of the present utility model also can test other axial static loads, the mechanical characteristic of the coal petrography under confined pressure, methane gas pressure and environment temperature radially.The detailed step of experimental technique of the present utility model is as follows:
(1) sample 4 surrounding except two ends is smeared to silica gel and be placed in heat-shrink tube rubber sleeve 14, sample 4 two ends are alignd with incident bar 2 and transmission bar 5 axle center respectively, make sample in sealing state, and the hydraulic oil in maintenance and radially confining pressure device 13 is isolated;
(2) the axial static pressure of the axial loading device of transmission bar 58 being loaded to hydraulic oil pump 9 opens, to axial static pressure, load in oil pressure storehouse 24 and add hydraulic oil, passing transmission bar 5 advances and compresses sample 4 to sample 4 directions, when sample 4 bears the axial static pressure of 10MPa, closing axle loads hydraulic oil pump 9 to static pressure, keeps sample 4 to apply the axial static pressure of 10MPa;
(3) confined pressure is loaded to hydraulic oil pump 11 and open, to radially adding hydraulic oil in confined pressure charger 13, when sample 4 bears the radially confined pressure of 10MPa, close confined pressure and load hydraulic oil pump 11, keep sample 4 to apply radially confined pressure of 10MPa;
(4) will open gas gas tank 14, regulate gas pressure variable valve 17, making to export methane gas pressure is 1MPa, make sample incident bar end apply certain gas pressure, open aspiration pump 18, make sample throwing-stick end produce certain negative pressure, impel Gas Flow, when the firedamp sensor 19 on gas escape pipe 20 monitors constant gas density and flow, close aspiration pump 18, keep the gas pressure 1MPa in gas inlet pipe 16, sample 4 is fully adsorbed, guarantee that sample 4 is in saturated gas bearing environment;
(5) open cold, hot two-purpose compressor 21,35 degrees Celsius of regulation output temperature, open servopump 22, make the heat transfer fluid process in cold, hot two-purpose compressor 21 make cold, hot two-purpose woven hose 23 in confining pressure device carry out heat exchange circulation, guarantee that radially confined pressure charger 13 and sample 4 are in design temperature state, heating process specimen temperature changes as shown in Figure 4.
(7) mobile absorbing rod 6, makes it align with the tight axle center of transmission bar 5;
(8) open data acquisition system (DAS) 7, this data acquisition system (DAS) is traditional SHPB equipment, and for gathering the stress wave signal of incident bar 3 and throwing-stick 5, its structure is common practise to those skilled in the art;
(9) closed gas pressure-regulating valve 17, gas gas tank 15, servopump 22;
(10) transmitting drift 1, drift 1 clashes into incident bar 2 and produces stress wave, and stress wave imports coal petrography sample 4 into by incident bar 2, by sample 4, is imported into transmission bar 5 and is imported into absorbing rod 6;
(11) data acquisition system (DAS) collects on incident bar 2 and transmission bar 5 stress wave signal by foil gauge 3, as shown in legend 5, by the data-signal collecting, carry out data processing, obtain this axial static load, the dynamic characteristics curve of coal petrography under confined pressure static load, gas pressure, many couple states of temperature radially.The dynamic stress strain curve of example coal petrography as shown in Figure 6 under 1MPa gas pressure.
Each above embodiment is described preferred implementation of the present utility model; not scope of the present utility model is limited; do not departing under the prerequisite of the utility model design spirit; various distortion and improvement that the common engineering technical personnel in this area make the technical solution of the utility model, all should fall in the definite protection domain of claims of the present utility model.

Claims (6)

1. one kind many couple state impact experiment apparatus, comprise axial static pressure charger, axially static pressure loads hydraulic oil pump, axially static pressure petroleum pipeline, confined pressure load hydraulic oil pump, confined pressure and load petroleum pipeline, radially confined pressure charger, gas gas tank, gas inlet pipe, gas pressure variable valve, aspiration pump, firedamp sensor, gas escape pipe, cold, hot two-purpose compressor, servo oil pump, cold, hot two-purpose petroleum pipeline, it is characterized in that:
Between the stress wave incident bar at the two ends of coal petrography sample and transmission bar, described axial static pressure charger is set, axial static pressure charger middle sample position arrange described in confined pressure charger radially;
Air admission hole and venthole are offered in incident bar and transmission bar center at sample two ends, be connected with gas escape pipe with gas inlet pipe respectively, gas inlet pipe is connected with gas gas tank by gas pressure variable valve, gas escape pipe is connected with aspiration pump by firedamp sensor, realizes experimentation sample in gas bearing environment;
Cold, hot two-purpose petroleum pipeline is set in confined pressure charger, by servo oil pump, is connected with cold, hot two-purpose compressor, realize sample experimentation temperature is controlled.
2. experimental provision according to claim 1, is characterized in that: described axial static pressure charger loads hydraulic oil pump by axial static pressure petroleum pipeline and axial static pressure and is connected, and realizes the axial static pressure of sample is loaded.
3. experimental provision according to claim 1, is characterized in that: described radially confined pressure charger loads petroleum pipeline by confined pressure and is connected with confined pressure loading hydraulic oil pump, realizes the radially static confined pressure of sample is loaded.
4. experimental provision according to claim 1, is characterized in that: also comprise data acquisition system (DAS), its two ends are connected with transmission bar with incident bar respectively by foil gauge, for gathering the stress wave signal of incident bar and transmission bar.
5. according to the experimental provision described in any one in claim 1-4, it is characterized in that: also comprise heat-shrink tube rubber sleeve, described sample surrounding except two ends is smeared to silica gel and be placed in heat-shrink tube rubber sleeve, guarantee sample and the isolation of confined pressure hydraulic oil, sample two ends is alignd with incident bar and transmission bar axle center respectively.
6. according to the experimental provision described in any one in claim 1-4, it is characterized in that: also comprise that the axial static pressure of incident end loads baffle plate, connecting rod, fixed screw, axially static pressure loads bunker O-ring seal, fixture splice on incident bar and transmission bar, wherein incident bar becomes convex with the fixture splice on transmission bar, outstanding position on incident bar is connected with the groove that the axial static pressure of incident end loads baffle plate centre, outstanding position on transmission bar loads oil pressure storehouse with axial static pressure and is connected, form hydraulic piston, the contact position that loads oil pressure storehouse and transmission bar at described axial static pressure is sealed by axial static pressure loading bunker O-ring seal respectively, axially static pressure loading oil pressure storehouse is connected by two connecting rods with the axial static pressure loading of incident end baffle plate, junction at described connecting rod and axial static pressure loading oil pressure storehouse and the axial static pressure loading of incident end baffle plate is fixed by fixed screw respectively, form the fixed frame of axial static pressure loading procedure, by axial static pressure petroleum pipeline and axial static pressure, loading hydraulic oil pump is connected, realization loads the axial static pressure of sample.
CN201320571367.XU 2013-09-13 2013-09-13 Impact loading test device for multi-field coupled coal rock Withdrawn - After Issue CN203465159U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103454164A (en) * 2013-09-13 2013-12-18 安徽理工大学 Multi-field coupled coal rock impact loading experimental device and method
CN105547871A (en) * 2015-12-10 2016-05-04 东北大学 Experimental apparatus and method for static-pressure rock impact tunnel destroy
CN105758704A (en) * 2016-02-23 2016-07-13 繁昌县菲德通讯材料设计有限公司 Confining pressure testing device for Hopkinson pressure bar
CN108169006A (en) * 2018-01-15 2018-06-15 华东交通大学 A kind of Hopkinson pressure bar confining pressure automatic control system for deep rock mass engineering project
CN110700794A (en) * 2019-09-06 2020-01-17 太原理工大学 Multi-branch horizontal well coal seam gas extraction physical simulation experiment system
CN111965091A (en) * 2020-09-17 2020-11-20 中南大学 Rock seepage characteristic testing device and method under thermal shock and dynamic shock coupling

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103454164A (en) * 2013-09-13 2013-12-18 安徽理工大学 Multi-field coupled coal rock impact loading experimental device and method
CN103454164B (en) * 2013-09-13 2016-02-03 安徽理工大学 Multi-scenarios method coal petrography impact loading experiment device and experimental technique
CN105547871A (en) * 2015-12-10 2016-05-04 东北大学 Experimental apparatus and method for static-pressure rock impact tunnel destroy
CN105547871B (en) * 2015-12-10 2018-04-06 东北大学 A kind of static pressure rock impact funnel breaking test device and method
CN105758704A (en) * 2016-02-23 2016-07-13 繁昌县菲德通讯材料设计有限公司 Confining pressure testing device for Hopkinson pressure bar
CN105758704B (en) * 2016-02-23 2018-12-14 繁昌县菲德通讯材料设计有限公司 A kind of Hopkinson pressure bar confining pressure test device
CN108169006A (en) * 2018-01-15 2018-06-15 华东交通大学 A kind of Hopkinson pressure bar confining pressure automatic control system for deep rock mass engineering project
CN110700794A (en) * 2019-09-06 2020-01-17 太原理工大学 Multi-branch horizontal well coal seam gas extraction physical simulation experiment system
CN110700794B (en) * 2019-09-06 2021-10-22 太原理工大学 Multi-branch horizontal well coal seam gas extraction physical simulation experiment system
CN111965091A (en) * 2020-09-17 2020-11-20 中南大学 Rock seepage characteristic testing device and method under thermal shock and dynamic shock coupling

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