CN1731133A - Dynamic and static combined rock loading experiment method and apparatus - Google Patents
Dynamic and static combined rock loading experiment method and apparatus Download PDFInfo
- Publication number
- CN1731133A CN1731133A CN 200510032031 CN200510032031A CN1731133A CN 1731133 A CN1731133 A CN 1731133A CN 200510032031 CN200510032031 CN 200510032031 CN 200510032031 A CN200510032031 A CN 200510032031A CN 1731133 A CN1731133 A CN 1731133A
- Authority
- CN
- China
- Prior art keywords
- drift
- bar
- loading experiment
- experiment method
- combined rock
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses an activity and inertia association loading rock mechanics experimental method and apparatus which press an equidirectional dead load and different intensity and time-delay impact load. The experimental apparatus comprises a fixed frame (9); the two ends of sampling unit (7) inside the fixed frame (9) separately arranges an incident bar (5) and a penetrating bar (8), wherein the out end of the penetrating bar (8) arranges an axial dead load charging device (11); the out end of the incident bar (5) arranges a thin pad (4) which has a punch (3), a punch sending mechanism (2) and a high pressure gas tank (1); the punch aims at the thin pad (4); the incident bar (5) and the penetrating bar (8) attaches the draft gauge (6).
Description
Technical field
The present invention is sound combined rock loading experiment method and device, belongs to rock mechanics experiment field.
Prior art
The mensuration of rock mechanics characteristic is all can't do without in the construction of any large-scale underground works, and the rock experiment is the important channel of understanding and assurance rock mechanics characteristic.Existing rock mechanics experimental technique and device have following characteristics:
1, static experiment.With INSTRON, MTS is that the rock mechanics experimental provision of representative can realize that rock static state arrives quasi-static experiment, is mainly used to obtain constitutive relation, compressive strength, tensile strength, the shearing strength of rock, conventional mechanics parameters such as elastic modulus, Poisson ratio.The experiment of this class mainly by hydraulic pressure to the rock imposed load, related experiment device and working specification are fairly perfect, use more at present.
2, dynamic experiment.With the Huo Bujinxun device is that the experimental provision of representative can be realized rock is applied strong dynamic load, be mainly used to measure rock in every dynamic performance parameter of high rate of strain section.
Yet, in the deep mining process, rock bears the engineering disturbance that high-ground stress and Blasting Excavation etc. produce, and it is subjected to force mode no longer is independent pure static load or pure dynamic load effect, but sound combination loading, this is that existing experimental technique and experimental provision do not have to consider.Realize rock sound combination loading experiment, not only can remedy the shortcoming of existing rock mechanics experimental technique, and can provide rock characteristic parameter accurately for the unstability and the Protective Research of deep rock mass engineering project.
Summary of the invention
The present invention separates the defective considered at existing rock mechanics experimental technique and device with static pressure and dynamic pressure according to rock loading characteristic in the deep mining, the sound combination loading experimental method and the device that provide a kind of its result and engineering reality more to meet.
Technical scheme of the present invention: a kind of sound combined rock loading experiment method is characterized in that rock is applied the shock load of same direction static load and varying strength and time-delay.Its experimental provision comprises fixed frame, two ends of test specimen are respectively equipped with incident bar, transmission bar in the fixed frame, the outer end of transmission bar is provided with axial static pressure charger, the outer end of incident bar is provided with shim liner, be provided with drift, drift trigger mechanism and high pressure gas holder at the shim liner place, drift is aimed at shim liner, and data acquisition processing system is arranged in addition, and it is by being attached to the foil gauge image data on incident bar and the transmission bar.The test specimen position is provided with confining pressure device in the middle of described fixed frame.
Major advantage of the present invention is: the same direction sound combination that realizes sample under laboratory condition loads, and realizes optional confined pressure simultaneously; Can simulate the mechanical characteristic of deep rock mass better, make experimental result that practical meaning in engineering more be arranged, utilize the inverting designing institute to get drift simultaneously and can realize that the permanent rate of strain of rock sample loads, and obtains the accurate dynamic parameter of rock.
Description of drawings
Fig. 1 loads the structural representation of rock mechanics experimental provision for sound combination of the present invention;
Fig. 2 is the punch shape figure of the embodiment of the invention;
The oscillogram that Fig. 3 collects by the foil gauge that is attached on incident bar and the outgoing bar for data acquisition system (DAS);
Fig. 4 loads constitutive relation figure by the resulting rock sound combination of software processes.
Each label is represented among the figure:
1, high pressure gas holder 2, drift trigger mechanism
3, drift 4, shim liner
5, incident bar 6, foil gauge
7, sample 8, transmission bar
9, fixed frame 10, confining pressure device
11, axial static pressure charger 12, data acquisition processing system
Embodiment
Sound combined rock loading experiment method of the present invention is the shock load that rock is applied same direction static load and varying strength and time-delay.
As shown in Figure 1, the device of sound combined rock loading experiment method of the present invention, comprise fixed frame 9, two ends of test specimen are respectively equipped with incident bar 5, transmission bar 8 in the fixed frame 9, the outer end of transmission bar 8 is provided with axial static pressure charger 11, the outer end of incident bar 5 is provided with shim liner 4, be provided with drift 3, drift trigger mechanism 2 and high pressure gas holder 1 at shim liner 4 places, drift 3 is aimed at shim liner 4, data acquisition processing system 12 is arranged in addition, and it is by being attached to foil gauge 6 image data on incident bar 5 and the transmission bar 8.The test specimen position is provided with confining pressure device 10 in the middle of fixed frame 9.
Concrete principle of work (operation steps) is:
1, at shim liner 4, assisting down of fixed frame 9, incident bar 5 and transmission bar 8 applies axial static pressure by 11 pairs of samples 7 of axial static pressure charger, and can regulate the axial compression size according to testing requirements;
2, experimental needs apply the confined pressure of adjustable size by 10 pairs of samples 7 of confining pressure device;
3, penetrate mechanism 2 input gases at high pressure by plus high-pressure gas tank 1 hair that liquidates, drive drift 3 and advance;
4, drift 3 bump shim liners 4 and incident bar 5 realize that the sound combination of sample 7 loads;
5, by impacting the given shape drift that inversion method provides, can produce the semiperiod sine wave, thereby realize the permanent rate of strain of sample 7 is loaded, typical drift 3 shape and size as shown in Figure 2, the interlude of drift 3 is cylindric, and head and afterbody are conical, and its cylindrical section diameter is 75mm, the head end diameter is 26mm, and the tail end face diameter is 10mm.The length of drift 3 is L, and head length is 8L/27, and the middle circle shell of column is 5L/27, and afterbody is long to be 14L/27.Drift 3 length L are 540mm.
6, data acquisition processing system 12 carries out aftertreatment by foil gauge 6 image data that are attached on incident bar 5 and the transmission bar 8.
Embodiment
1 preparation sample: diameter 70mm, long 35mm
2. lay sample, add confined pressure 20MPa, add axial static pressure 10MPa
3. mix up data acquisition system (DAS), wait for and triggering
4. charge into gases at high pressure by high pressure gas holder 1 to drift trigger mechanism 2
5. open the switch on the drift trigger mechanism 2, drift 3 impacts incident bar 5, stress wave activity sample 7 and transmission bar 8 under gases at high pressure promote.Simultaneously, data acquisition processing system 12 is realized data acquisition by the foil gauge 6 that is attached on incident bar 5 and the transmission bar 8; The waveform that collects as shown in Figure 3.
6. with special data processing software the data waveform is handled, the constitutive relation (as shown in Figure 4) and other correlation parameter that obtain sample under the sound combination loading environment are as shown in the table.
Other rock sound that is obtained by software makes up loading performance parameter list
Average?strain?rate(1/s)＝47.63
Peak?Stress(MPa)＝222.44
Strain?rate?at?Peak(1/s)＝47.40
Absorbed?energy/vol.(J/cm^3)＝1.41
Absorbed?energy/vol.at?peak(J/cm^3)＝0.62
Total?absorbed?energy(J)＝188.32
Total?incident?energy(J)＝702.03
Total?reflected?energy(J)＝29.20
Total?transmitted?energy(J)＝484.51
Absorbed?energy?at?peak(J)＝82.10
Incident?energy?at?peak(J)＝346.85
Reflected?energy?at?peak(J)＝19.52
Transmitted?energy?at?peak(J)＝245.23
Time?at?peak(us))＝111.00
Claims (7)
1, a kind of sound combined rock loading experiment method is characterized in that rock is applied the shock load of same direction static load and varying strength and time-delay.
2, a kind of device of the combined rock loading experiment method of sound according to claim 1, it is characterized in that it comprises fixed frame (9), two ends of the interior test specimen of fixed frame (9) (7) are respectively equipped with incident bar (5), transmission bar (8), the outer end of transmission bar (8) is provided with axial static pressure charger (11), the outer end of incident bar (5) is provided with shim liner (4), locate to be provided with drift (3), drift trigger mechanism (2) and high pressure gas holder (1) at shim liner (4), drift is aimed at shim liner (4), posts foil gauge (6) on incident bar (5) and transmission bar (8).
3, the device of sound combined rock loading experiment method according to claim 2 is characterized in that the test specimen position is provided with confining pressure device (10) in the middle of fixed frame (9).
4, according to the device of claim 2 or 3 described sound combined rock loading experiment methods, the centre that it is characterized in that described drift (3) is cylindric, and head and afterbody are conical.
5, the device of sound combined rock loading experiment method according to claim 4 is characterized in that described drift (3) cylindrical section diameter is 75mm, and the head end diameter is 26mm, and the tail end face diameter is 10mm.
6, the device of sound combined rock loading experiment method according to claim 5 is characterized in that described drift (3) length is L, and head length is 8L/27, and the middle circle shell of column is 5L/27, and afterbody is long to be 14L/27.
7, the device of sound combined rock loading experiment method according to claim 6 is characterized in that described drift (3) length L is 540mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100320316A CN100397063C (en) | 2005-08-18 | 2005-08-18 | Dynamic and static combined rock loading experiment method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100320316A CN100397063C (en) | 2005-08-18 | 2005-08-18 | Dynamic and static combined rock loading experiment method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1731133A true CN1731133A (en) | 2006-02-08 |
| CN100397063C CN100397063C (en) | 2008-06-25 |
Family
ID=35963529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100320316A Active CN100397063C (en) | 2005-08-18 | 2005-08-18 | Dynamic and static combined rock loading experiment method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100397063C (en) |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101446537B (en) * | 2008-11-10 | 2010-08-25 | 中南大学 | Adjustable multi-hob rock cutting fragmentation test means |
| CN102937554A (en) * | 2012-11-13 | 2013-02-20 | 中南大学 | High-stress rock drilling testing device |
| CN103076242A (en) * | 2013-01-11 | 2013-05-01 | 重庆大学 | Dynamic characteristic testing system with high confining pressure and temperature control for materials |
| CN103206206A (en) * | 2012-01-16 | 2013-07-17 | 中国石油化工股份有限公司 | Method for calculating fracture pressure of ultra deep well formations |
| 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 |
| CN103743665A (en) * | 2014-01-06 | 2014-04-23 | 安徽理工大学 | Loading device for simulating stress of coal rock |
| CN104181029A (en) * | 2014-07-22 | 2014-12-03 | 东北大学 | Device and method for testing looseness of rock under disturbance of strain rate in loading process of pendulum bob |
| CN104677723A (en) * | 2015-01-30 | 2015-06-03 | 西北工业大学 | Primary coil of electromagnetic stress wave generator and charging/discharging methods |
| CN103471942B (en) * | 2013-09-18 | 2015-07-01 | 山东科技大学 | Uniaxial impact ground pressure simulation test system and application method of impact ground pressure uniaxial simulation test system |
| CN104849153A (en) * | 2015-05-22 | 2015-08-19 | 中南大学 | Device for testing underground space spallation strength and application thereof |
| CN105527176A (en) * | 2016-02-03 | 2016-04-27 | 中国矿业大学 | Test device for deep jointed rock mass fracturing mechanism under impact load |
| CN105547871A (en) * | 2015-12-10 | 2016-05-04 | 东北大学 | Experimental apparatus and method for static-pressure rock impact tunnel destroy |
| CN106248475A (en) * | 2016-08-05 | 2016-12-21 | 湖南科技大学 | The method that in the impact depression bar test of a kind of bedded rock, stress wave separates |
| CN106404519A (en) * | 2016-12-19 | 2017-02-15 | 湖南科技大学 | Test device for splitting tensile fracture under impact-static-hydraulic coupling effect of rock and test method |
| CN107314933A (en) * | 2017-06-20 | 2017-11-03 | 山东科技大学 | Under dynamic and sound combined load in coal petrography assembly coal dynamic characteristic test method |
| CN107966374A (en) * | 2016-10-19 | 2018-04-27 | 核工业北京地质研究院 | A kind of test device for fissuted medium dynamic pressure-infiltration hydraulic pressure combination loading |
| CN108489800A (en) * | 2018-03-06 | 2018-09-04 | 安徽理工大学 | A kind of pressure assembly and its experimental provision for testing rock elasticity aftereffect |
| CN108931445A (en) * | 2018-06-25 | 2018-12-04 | 中南大学 | Rock dynamic mechanical property experimental provision under a kind of microwave radiation |
| CN109374700A (en) * | 2018-12-07 | 2019-02-22 | 中南大学 | A method of detection fissure rock filling experiment effect |
| CN110595918A (en) * | 2019-10-25 | 2019-12-20 | 安徽理工大学 | Dynamic and static coupling loading anchoring body test device |
| CN110608956A (en) * | 2019-08-07 | 2019-12-24 | 中南大学 | System and method for measuring dynamic Poisson's ratio of brittle material |
| CN110702352A (en) * | 2019-11-26 | 2020-01-17 | 广州大学 | Device for testing shock resistance of beam column member |
| CN110749521A (en) * | 2018-07-24 | 2020-02-04 | 中石化石油工程技术服务有限公司 | Dynamic and static load combined rock breaking test device and test method |
| WO2020206922A1 (en) * | 2019-04-12 | 2020-10-15 | 山东科技大学 | Rock mechanics testing machine combining dynamic and static loads, and testing method |
| WO2021008010A1 (en) * | 2019-07-17 | 2021-01-21 | 深圳大学 | Dynamic and static combined electromagnetic loading hopkinson rock rod wave propagation test device |
| CN113984523A (en) * | 2021-10-28 | 2022-01-28 | 中国矿业大学 | Testing device and testing method for dynamic and static combined loading strength of rock simulation material |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1004516B (en) * | 1986-12-06 | 1989-06-14 | 武汉工学院 | Vibration friction abrasion testing machine |
| SU1642305A1 (en) * | 1988-02-10 | 1991-04-15 | Государственный всесоюзный дорожный научно-исследовательский институт | Apparatus for three-axis testing of soils by static and dynamic loading |
| FR2696004B1 (en) * | 1992-09-21 | 1994-12-16 | Colas Sa | Plate type soil test apparatus and vehicle equipped with such apparatus. |
-
2005
- 2005-08-18 CN CNB2005100320316A patent/CN100397063C/en active Active
Cited By (40)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101446537B (en) * | 2008-11-10 | 2010-08-25 | 中南大学 | Adjustable multi-hob rock cutting fragmentation test means |
| CN103206206A (en) * | 2012-01-16 | 2013-07-17 | 中国石油化工股份有限公司 | Method for calculating fracture pressure of ultra deep well formations |
| CN102937554B (en) * | 2012-11-13 | 2014-10-29 | 中南大学 | High-stress rock drilling testing device |
| CN102937554A (en) * | 2012-11-13 | 2013-02-20 | 中南大学 | High-stress rock drilling testing device |
| CN103076242A (en) * | 2013-01-11 | 2013-05-01 | 重庆大学 | Dynamic characteristic testing system with high confining pressure and temperature control for materials |
| CN103076242B (en) * | 2013-01-11 | 2016-02-24 | 重庆大学 | Material high confining pressure temperature control dynamical property test system |
| 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 |
| CN103471942B (en) * | 2013-09-18 | 2015-07-01 | 山东科技大学 | Uniaxial impact ground pressure simulation test system and application method of impact ground pressure uniaxial simulation test system |
| CN103743665A (en) * | 2014-01-06 | 2014-04-23 | 安徽理工大学 | Loading device for simulating stress of coal rock |
| CN104181029B (en) * | 2014-07-22 | 2017-03-08 | 东北大学 | Assay device and method that under strain rate disturbance in a kind of pendulum loading, rock relaxes |
| CN104181029A (en) * | 2014-07-22 | 2014-12-03 | 东北大学 | Device and method for testing looseness of rock under disturbance of strain rate in loading process of pendulum bob |
| CN104677723A (en) * | 2015-01-30 | 2015-06-03 | 西北工业大学 | Primary coil of electromagnetic stress wave generator and charging/discharging methods |
| CN104677723B (en) * | 2015-01-30 | 2017-06-13 | 西北工业大学 | The main coil of electromagnetic type stress wave producer and the method for charge/discharge |
| CN104849153A (en) * | 2015-05-22 | 2015-08-19 | 中南大学 | Device for testing underground space spallation strength and application thereof |
| 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 |
| CN105547871A (en) * | 2015-12-10 | 2016-05-04 | 东北大学 | Experimental apparatus and method for static-pressure rock impact tunnel destroy |
| CN105527176A (en) * | 2016-02-03 | 2016-04-27 | 中国矿业大学 | Test device for deep jointed rock mass fracturing mechanism under impact load |
| CN106248475A (en) * | 2016-08-05 | 2016-12-21 | 湖南科技大学 | The method that in the impact depression bar test of a kind of bedded rock, stress wave separates |
| CN106248475B (en) * | 2016-08-05 | 2018-10-16 | 湖南科技大学 | A kind of method that bedded rock impacts stress wave separation in compression bar experiment |
| CN107966374A (en) * | 2016-10-19 | 2018-04-27 | 核工业北京地质研究院 | A kind of test device for fissuted medium dynamic pressure-infiltration hydraulic pressure combination loading |
| CN106404519A (en) * | 2016-12-19 | 2017-02-15 | 湖南科技大学 | Test device for splitting tensile fracture under impact-static-hydraulic coupling effect of rock and test method |
| CN107314933A (en) * | 2017-06-20 | 2017-11-03 | 山东科技大学 | Under dynamic and sound combined load in coal petrography assembly coal dynamic characteristic test method |
| CN107314933B (en) * | 2017-06-20 | 2019-07-05 | 山东科技大学 | Under dynamic and sound combined load in coal petrography assembly coal dynamic characteristic test method |
| CN108489800A (en) * | 2018-03-06 | 2018-09-04 | 安徽理工大学 | A kind of pressure assembly and its experimental provision for testing rock elasticity aftereffect |
| CN108489800B (en) * | 2018-03-06 | 2020-06-09 | 安徽理工大学 | Pressure applying assembly and experimental device for testing elastic after-effect of rock |
| CN108931445A (en) * | 2018-06-25 | 2018-12-04 | 中南大学 | Rock dynamic mechanical property experimental provision under a kind of microwave radiation |
| CN110749521B (en) * | 2018-07-24 | 2022-07-12 | 中石化石油工程技术服务有限公司 | Dynamic and static load combined rock breaking test device and test method |
| CN110749521A (en) * | 2018-07-24 | 2020-02-04 | 中石化石油工程技术服务有限公司 | Dynamic and static load combined rock breaking test device and test method |
| CN109374700A (en) * | 2018-12-07 | 2019-02-22 | 中南大学 | A method of detection fissure rock filling experiment effect |
| WO2020206922A1 (en) * | 2019-04-12 | 2020-10-15 | 山东科技大学 | Rock mechanics testing machine combining dynamic and static loads, and testing method |
| WO2021008010A1 (en) * | 2019-07-17 | 2021-01-21 | 深圳大学 | Dynamic and static combined electromagnetic loading hopkinson rock rod wave propagation test device |
| CN110608956A (en) * | 2019-08-07 | 2019-12-24 | 中南大学 | System and method for measuring dynamic Poisson's ratio of brittle material |
| CN110595918A (en) * | 2019-10-25 | 2019-12-20 | 安徽理工大学 | Dynamic and static coupling loading anchoring body test device |
| CN110595918B (en) * | 2019-10-25 | 2024-03-29 | 安徽理工大学 | Dynamic and static coupling loading anchor body test device |
| CN110702352A (en) * | 2019-11-26 | 2020-01-17 | 广州大学 | Device for testing shock resistance of beam column member |
| CN110702352B (en) * | 2019-11-26 | 2021-10-26 | 广州大学 | Device for testing shock resistance of beam column member |
| CN113984523A (en) * | 2021-10-28 | 2022-01-28 | 中国矿业大学 | Testing device and testing method for dynamic and static combined loading strength of rock simulation material |
| US20230137003A1 (en) * | 2021-10-28 | 2023-05-04 | China University Of Mining And Technology | Apparatus and method for testing combined dynamic-static loading strength of rock-like material |
| US11644398B1 (en) * | 2021-10-28 | 2023-05-09 | China University Of Mining And Technology | Apparatus and method for testing combined dynamic-static loading strength of rock-like material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100397063C (en) | 2008-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1731133A (en) | Dynamic and static combined rock loading experiment method and apparatus | |
| CN104048883B (en) | The method of testing brittle material dynamic shearing fracture toughness and enforcement device thereof | |
| Forrestal et al. | Penetration of concrete targets with deceleration-time measurements | |
| CN112858024B (en) | Device and method for measuring dynamic performance of deep rock under hydraulic coupling effect | |
| CN105181453B (en) | Rock soil medium tensile-sbear strength method for testing and analyzing | |
| FR2933495B1 (en) | TRIAXIAL CELL OF GEOMATERIALS UNDER PRESSURE AND SHEAR | |
| Yan et al. | Experimental investigation of pre-flawed rocks under combined static-dynamic loading: Mechanical responses and fracturing characteristics | |
| CN103604706B (en) | A kind of complicated energetic disturbance rock burst laboratory experiment method and device for carrying out said thereof | |
| CN111595682A (en) | Large-scale complex surrounding rock condition anchoring and grouting integrated coupling effect test system and method | |
| CN104375167A (en) | Down-hole coal seam earthquake CT detection vibroseis and method based on seismal waves excited by spring | |
| CN112014199B (en) | Rock variable-angle shearing device and test method thereof | |
| CN114383949B (en) | Method for testing bearing capacity and energy dissipation rule of rock mass containing cavity | |
| CN101033616A (en) | Basic structure dynamic measuring instrument capable of asynchronous collecting signal and synchronous correcting | |
| CN110579413A (en) | variable-rod-diameter Hopkinson pressure bar experiment device and method | |
| Zhang et al. | Experimental study on anisotropic strength properties of sandstone | |
| CN211122369U (en) | Variable rod diameter Hopkinson pressure bar experimental device | |
| Zhuge et al. | Material properties and impact resistance of a new lightweight engineered cementitious composite | |
| CN210742027U (en) | Hopkinson rock rod device for rock mass stress wave propagation test | |
| Yang et al. | Experimental study on strength discreteness and triaxial compression of coal. | |
| Yang | Effect of displacement loading rate on mechanical properties of sandstone | |
| Jha | Dynamic uniaxial compressive tests on limestone | |
| Xue et al. | Anisotropic Mechanical Behavior of Stratified Sandstone Subjected to Cyclic Loading | |
| CN213749400U (en) | Point load test device | |
| CN115326602B (en) | Method for monitoring and evaluating dynamic performance of anchored rock mass | |
| AU2021102214A4 (en) | Triaxial Tensile Test Device and Method for Rocks |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |