CN102564847A - Triaxial test rigid loading device for rock mass - Google Patents
Triaxial test rigid loading device for rock mass Download PDFInfo
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- CN102564847A CN102564847A CN2011104389354A CN201110438935A CN102564847A CN 102564847 A CN102564847 A CN 102564847A CN 2011104389354 A CN2011104389354 A CN 2011104389354A CN 201110438935 A CN201110438935 A CN 201110438935A CN 102564847 A CN102564847 A CN 102564847A
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Abstract
A triaxial test rigid loading device for rock mass is mainly formed by a main engine frame and press heads. The main engine frame comprises main engine bases and an axial pressure cylinder. Vertical columns are arranged on the main engine bases, two side press cylinders are symmetrically arranged on two sides of the axial press cylinder, lower support sliders sleeving on the vertical columns are arranged on the two side press cylinders, the main engine bases on the outer sides of the two side press cylinders are respectively provided with hydraulic support columns, the hydraulic support columns are provided with upper support sliders sleeved on the vertical columns provided with upper beams. The press heads comprise axial press heads and side press heads sleeved on the axial press heads, the axial press heads are arranged on axial press cylinders, and the side press heads are fixed on the lower support sliders. Axial pressure and side pressure can be exerted on a triaxial test sample through servo control. The main engine frame moves from bottom to top to add pressure on the test sample, the side pressure adopts a solid pressure transmission method, the axial pressure and the side pressure are loaded respectively and independently, the axial press heads and the side press heads both adopt reducing structures. The triaxial test rigid loading device for the rock mass is simple in structure, convenient to operate and capable of finishing tests for large test samples.
Description
Technical field
The present invention relates to the axial compression side pressure rigidity load maintainer of three experiments of a kind of rock mass high temperature, be particularly useful for carrying out the experiment of three of high temperature under different axial compressions, the side pressure combination condition, belong to the Mineral Engineering field.
Background technology
Since 18 beginning of the century Material Testing Machine are come out, passed through 200 years of development and raising, testing machine is healed and is become to improving with accurate.But, all be to be masterpiece independent variable traditionally in Material Testing Machine, carry out mechanical test with the constant load rate.This experimental technique still can satisfy the needs of engineering design in the ordinary course of things for more even, the isotropic continuous perfect elastic material of material (like metal material and timber).But; Because rock (coal or other hard brittle material) is heterogeneous body, anisotropic discontinuous medium, be the hard brittle material of a kind of porous crack, more piece reason, many planes of weakness, its character and the former are completely different; If still utilize the common material testing machine to make an experiment; Promptly with constant loading speed the rock type sample is loaded and reach its strength degree value when (also claiming peak value), test produces embrittlement and destroys, and the elastic deformation energy that testing machine is stored in process of the test sharply and fiercely discharges and makes rock sample out of control and collapse immediately at the peak value place; If applied stress-strain curve is described the words of sample destructive process; Then this curve can only be painted into peak value one section curve (being the first half term stress-strain curves) in the past, and the curve behind the peak value (being the second half stress-strain curves) just can suddenly disappear, and does not obviously meet engineering reality.
The reason that above-mentioned phenomenon occurs is the rigidity of the rigidity of conventional test machine less than rock type materials, makes the rock experimental result can not reflect the mechanics condition (comprising strength characteristic, deformation behaviour and the destructive process of controlling stone) of rock truly.And the testing machine of big rigidity has successfully been depicted the omnidistance stress-strain curves of rock, and is significant for the rock mass engineering project structure Design.Afterwards, big stiffness test machine (being the implosion test machine) becomes the new development of rock mechanics experimental technique as the new tool of rock type materials experiment.For many years; Domestic and international many rock mechanics scholars have done number of research projects; Developed the implosion test machine of some kinds of different principle, different structure; Like confined pressure triaxial test machine, true triaxial test machine (appearance), HTHP triaxial test machine, large-scale true triaxial test machine etc., and carry out the research of a large amount of correlation tests thereupon, disclosed the characteristic many rarely known by the people of rock, rock mass; Promoted the rock mechanics subject development greatly, become the new branch of science of material impact is arranged in the national economy.
Along with the mankind's developing rapidly to deep resource energy development engineering; Engineering problem such as underground coal gasification(UCG), high temperature rock mass geothermal exploitation, deep oil-gas mining, waste disposal etc. are relevant with temperature is more and more; Press for the characteristic of understanding deep rock mass; The solution of these problems be unable to do without the development and progress of experimental technique, be unable to do without the development of testing machine technology.And domestic and international existing high temperature and pressure test machine; Although can be implemented in the experiment under high-temperature and the high pressure; But (Φ 20 mm * 40 mm) are very little for specimen size; And function singleness only can be carried out the research of geophysics aspects such as deformation characteristic and elastic wave, and difficulty provides the rock mass condition relevant with the human engineering activity.
Summary of the invention
Technical matters: the objective of the invention is to overcome the weak point in the prior art, provide a kind of three of rock mass high temperature simple in structure, easy to operate, that can accomplish the bulk specimen test to test axial compression side pressure rigidity loading equipemtn.
Technical scheme: three experiments of rock mass of the present invention rigidity charger; Mainly constitute by main machine frame and pressure head; Described main machine frame comprises the main frame base, is located at the axial compression cylinder at main frame base middle part, is respectively equipped with the column that is fixedly connected through set nut on four angles of main frame base, and the symmetria bilateralis of axial compression cylinder is provided with two side pressure cylinders; Two side pressure cylinders are provided with the following holder slide block that is enclosed within on the column; Be respectively equipped with hydraulic prop on the main frame base in two side pressure cylinder outsides, hydraulic prop is provided with the pop-up slide block that is sleeved on the column, and column is provided with upper beam; Described pressure head comprises the axial compression pressure head and is enclosed within the side pressure pressure head on the axial compression pressure head, and the axial compression pressure head is located on the axial compression cylinder, and the side pressure pressure head is fixed on down and holds in the palm on the slide block.
Described axial compression pressure head external diameter is for going up little variable-diameter structure down greatly; The internal diameter of described side pressure pressure head is for going up little variable-diameter structure down greatly; Described upper beam, main frame base, pop-up slide block are welded by the Q-235-A steel plate.
Beneficial effect: axial compression of the present invention and side pressure can independently load through servocontrol separately; Solid pressure transmission mode is adopted in side pressure; Three experiments of high temperature that can be large dimension specimen (Φ 200 mm * 400 mm) provide the axial compression and the side pressure of various combination; The rock mass condition relevant with the human engineering activity better is provided; Can be applicable to explore the deep scientific law and the spontaneous phenomenon in engineering field very widely such as deep mining, the underground direct liquefaction of coal and gasification, underground heat exploitation, coal-bed gas exploitation, deep oil-gas mining, waste disposal, mine safety, building safety, can be the energy and development of resources original thinking and research direction is provided.It is simple in structure, rigidity is strong, can accomplish the test of bulk specimen.
Description of drawings
Fig. 1 is a structural drawing of the present invention;
Fig. 2 is the A-A cut-open view of Fig. 1.
Among the figure: 1-puts the beams in place, 2-column, 3-side pressure pressure head, 4-axial compression pressure head, 5-high temperature triaxial cell; The 6-set nut, 7-side pressure cylinder, the 8-hydraulic prop, 9-pop-up slide block, 10-be the holder slide block down; 11-axial compression cylinder, 12-confined pressure cover, 13-pyrophyllite powder, 14-salt, 15-lower shaft pressure head; The last axial compression head of 16-, 17-sample, 18-pressure chamber cover plate, 19-main frame cover plate, 20-main frame base.
Embodiment
Below in conjunction with accompanying drawing one embodiment of the present of invention are further described:
As shown in Figure 1, three experiments of rock mass of the present invention rigidity charger mainly is made up of main machine frame and pressure head, joins and pressing system and control desk work compound.Described main machine frame adopts three beam four-post vertical structures, rectangular style, and it is by putting the beams in place 1, main frame base 20, axial compression cylinder 11, side pressure cylinder 7, hydraulic prop 8, column 2, set nut 6, pop-up slide block 9, asking slide block 10 to form down.Axial compression cylinder 11, side pressure cylinder 7 are ram cylinder, and cylinder body is ZG270-500, and plunger is the 45# forged steel, the plunger surface Quenching Treatment.The plunger end face is equipped with a 4Cr5MoSiV1 alloy-steel plate, and booster rod all adopts the H13 alloy steel material, leaves osculum, and surface hardening is handled.Wherein, column 2 upper ends are fixedly connected with upper beam 1, and axial compression cylinder 11 is located at the middle part of main frame base 20; Be respectively equipped with the column 2 that is fixedly connected through set nut 6 on four angles of main frame base 20; The symmetria bilateralis of axial compression cylinder 11 is provided with two side pressure cylinders 7, and side pressure cylinder 7 is fixed on column 2 middle parts through nut, and two side pressure cylinders 7 are provided with the following holder slide block 10 that is enclosed within on the column 2; Be respectively equipped with hydraulic prop 8 on the main frame base 20 in two side pressure cylinder 7 outsides; Hydraulic prop 8 is provided with the pop-up slide block 9 that is sleeved on the column 2, and pop-up slide block 9, to hold in the palm slide block 10 down be guiding with column 2, can move up and down under driving at hydraulic support 8, side pressure cylinder 7; Be provided with on the column 2 and put the beams in place 1.Described pressure head comprises axial compression pressure head 4 and is enclosed within the side pressure pressure head 3 on the axial compression pressure head 4; Axial compression pressure head 4 is fixed on the axial compression cylinder 11; Side pressure pressure head 3 is fixed in holder slide block 10 upper surfaces down; Axial compression pressure head 4 and side pressure pressure head 3 be the employing variable-diameter structure all, and axial compression pressure head 4 external diameters are for going up little variable-diameter structure down greatly, and the internal diameter of side pressure pressure head 3 is big down little variable-diameter structure; Described upper beam 1, main frame base 20, pop-up slide block 10 are welded by the Q-235-A steel plate, and postwelding is all done annealing in process.It is the pressure head of 195 mm that axial compression pressure head 4 adopts diameter, and it is 200 mm that side pressure pressure head 3 adopts internal diameter, and external diameter is the annular pressure head of 300 mm, outside the high temperature triaxial cell 5, adopts the transition gradually of larger-diameter pressure head, and the load maintainer integral rigidity is not less than 9 * 10
10N/m.
The course of work: at first give this load maintainer power supply, start hydraulic prop 8 afterwards pop-up slide block 9 is risen, when pressure chamber, 5 upper surface, high temperature triaxial cell cover plate 18 and main frame cover plate 19 contact as far as possible roughly do not have the slit after, 9 pop-up slide blocks stop to rise.Start axial compression cylinder 11 and side pressure cylinder 7 then, alternately elevating shaft cylinder pressure 11 loads with side pressure cylinder 7, must guarantee to let axial compression touch 15 lower shaft pressure heads earlier.The axial compression pressure head is risen apply pressure to axial compression 16 through the Control Shaft cylinder pressure, axial compression acts on sample 17 through last axial compression 16, and realization loads the sample axial compression; Control side pressure cylinder 7 rises the holder slide block, side pressure pressure head 3 with under ask slide block to rise to apply pressure to confined pressure cover 12, side pressure acts on pyrophyllite powder 13, salt 14, sample 17 more successively, thereby realizes the side pressure loading to sample 17.
Claims (4)
1. three of rock mass are tested the rigidity charger; It is characterized in that: it mainly is made up of main machine frame and pressure head; Described main machine frame comprises main frame base (20), is located at the axial compression cylinder (11) at main frame base (20) middle part; Be respectively equipped with the column (2) that is fixedly connected through set nut (6) on four angles of main frame base (20); The symmetria bilateralis of axial compression cylinder (11) is provided with two side pressure cylinders (7), and two side pressure cylinders (7) are provided with the following holder slide block (10) that is enclosed within on the column (2), is respectively equipped with hydraulic prop (8) on the main frame base (20) in two side pressure cylinders (7) outside; Hydraulic prop (8) is provided with the pop-up slide block (9) that is sleeved on the column (2), and column (2) is provided with upper beam (1); Described pressure head comprises axial compression pressure head (4) and is enclosed within the side pressure pressure head (3) on the axial compression pressure head (4), and axial compression pressure head (4) is located on the axial compression cylinder (11), and side pressure pressure head (3) is fixed on down on the holder slide block (10).
2. three experiments of rock mass according to claim 1 rigidity charger is characterized in that: described axial compression pressure head (4) external diameter is for going up little variable-diameter structure down greatly.
3. three experiments of rock mass according to claim 1 rigidity charger is characterized in that: the internal diameter of described side pressure pressure head (3) is for going up little variable-diameter structure down greatly.
4. three experiments of rock mass according to claim 1 rigidity charger, it is characterized in that: described upper beam (1), main frame base (20), pop-up slide block (10) are welded by the Q-235-A steel plate.
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| CN2011104389354A CN102564847A (en) | 2011-12-26 | 2011-12-26 | Triaxial test rigid loading device for rock mass |
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| CN2011104389354A CN102564847A (en) | 2011-12-26 | 2011-12-26 | Triaxial test rigid loading device for rock mass |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884604A (en) * | 2014-04-08 | 2014-06-25 | 中国矿业大学 | Multifunctional high-temperature and high-pressure three-axis coal rock testing device and method |
| CN106769519A (en) * | 2017-03-06 | 2017-05-31 | 中国人民解放军理工大学 | A kind of pseudo- three axles method of testing based on dynamic fatigue test machine |
| CN106932280A (en) * | 2017-05-17 | 2017-07-07 | 中国矿业大学(北京) | A kind of deep original position coal petrography confined pressure loading chambers |
| CN108593458A (en) * | 2018-05-30 | 2018-09-28 | 中国矿业大学 | A kind of coal petrography high temperature and pressure deformation detection system |
| CN110987602A (en) * | 2019-12-10 | 2020-04-10 | 东北大学 | Multifunctional sample box with pneumatic quick single-side unloading function |
| CN108458926B (en) * | 2018-01-30 | 2021-01-05 | 东南大学 | Thermal rigid single-shaft loading device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884604A (en) * | 2014-04-08 | 2014-06-25 | 中国矿业大学 | Multifunctional high-temperature and high-pressure three-axis coal rock testing device and method |
| CN103884604B (en) * | 2014-04-08 | 2015-12-09 | 中国矿业大学 | A kind of multifunctional high-temperature high pressure three axle coal petrography test unit and method |
| CN106769519A (en) * | 2017-03-06 | 2017-05-31 | 中国人民解放军理工大学 | A kind of pseudo- three axles method of testing based on dynamic fatigue test machine |
| CN106769519B (en) * | 2017-03-06 | 2019-05-17 | 中国人民解放军理工大学 | A kind of three axis test method of puppet based on dynamic fatigue test machine |
| CN106932280A (en) * | 2017-05-17 | 2017-07-07 | 中国矿业大学(北京) | A kind of deep original position coal petrography confined pressure loading chambers |
| CN108458926B (en) * | 2018-01-30 | 2021-01-05 | 东南大学 | Thermal rigid single-shaft loading device |
| CN108593458A (en) * | 2018-05-30 | 2018-09-28 | 中国矿业大学 | A kind of coal petrography high temperature and pressure deformation detection system |
| CN108593458B (en) * | 2018-05-30 | 2020-09-29 | 中国矿业大学 | Coal petrography high temperature high pressure deformation detecting system |
| CN110987602A (en) * | 2019-12-10 | 2020-04-10 | 东北大学 | Multifunctional sample box with pneumatic quick single-side unloading function |
| CN110987602B (en) * | 2019-12-10 | 2021-04-13 | 东北大学 | Multifunctional sample box with pneumatic quick single-side unloading function |
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Application publication date: 20120711 |