CN104613905A - Displacement monitoring device and use method thereof for three-dimensional similar simulation material simulation test - Google Patents
Displacement monitoring device and use method thereof for three-dimensional similar simulation material simulation test Download PDFInfo
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- CN104613905A CN104613905A CN201410816181.5A CN201410816181A CN104613905A CN 104613905 A CN104613905 A CN 104613905A CN 201410816181 A CN201410816181 A CN 201410816181A CN 104613905 A CN104613905 A CN 104613905A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B13/00—Measuring arrangements characterised by the use of fluids
- G01B13/02—Measuring arrangements characterised by the use of fluids for measuring length, width or thickness
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Abstract
The invention discloses a displacement monitoring device and a use method thereof for a three-dimensional similar simulation material simulation test. The displacement monitoring device is mainly structurally characterized in that a micro-pressure sensing device is provided with a liquid storage cavity structure, directly buried inside a similar simulation material and respectively connected with a liquid storage box, an acquisition instrument and a computer, and complicated internal local displacement monitoring of a similar simulation material is ingeniously converted into simple pressure signal detection and output, so that the displacement monitoring device is simple and reasonable in structure, real and accurate in test result and small in system error, has automatic reading and full reading functions, and effectively solves the technical problems that 'change points' cannot be monitored, only overlaying rock sinking can be monitored, overlaying rock lifting cannot be monitored, and consequently, simulation test results are incomplete, untruth and inaccurate in the prior art.
Description
Technical field
The present invention relates to a kind of similarity simulation experiment displacement monitor used and using method thereof, particularly relate to a kind of displacement monitor and the using method for three-dimensional similar materials simulation test thereof.
Background technology
The overlying strata characteristics of motion is the important research content of mining engineering, but brings inconvenience because its research object is relatively hidden to research.
Analog simulation makes the model similar to prototype by the principle of similitude in laboratory, by test instrumentation observation model interior mechanics parameter and the regularity of distribution thereof, utilize the result of study on model, so as to inferring contingent Mechanics Phenomenon and rock mass pressure law in prototype.
Therefore, adopt the method for equivalent material simulating, when the overlying strata motion that research mining subsidence causes and Surface movement rule thereof, can give expression to intuitively in advance of the face process, caused overlying strata and the liquid prosposition on earth's surface moves, deflection and movement law thereof, provide conveniently for we study movement rule.
But in prior art, for three-dimensional resemble simulation test, the change in displacement process wanting to monitor arbitrfary point in overlying strata is still difficult to realize.
Chinese patent application CN201653319U discloses a kind of three-dimensional distributed shift measurement device, it comprises the hard metal sheet of many shift value readers and equal number, wherein shift value reader and hard metal sheet one_to_one corresponding, is connected by a fishing line with between a hard metal sheet at each self-corresponding shift value reader;
It is by being fixed on the hard metal sheet of model inside as iron plate or steel disc etc. in the mode buried underground, when there is the change of simulation rock movement in model inside, hard metal sheet on this height layer drives fishing line, by fishing line stretching displacement numerical value reader, read shift value by the observation of shift value reader, and then realize the observation to the strata displacement campaign of model inside.
But there is many weak points in the monitoring device of this version, is mainly manifested in:
1, in process of the test, three-dimensional distributed displacement measurement (monitoring) device inevitably will apply external force to overlying strata, will affect the accuracy of test findings;
2, reading is discontinuous, thus may occur to cause because of back production overlying strata motion discontinuities monitoring less than problem;
3, its principle of work is only limitted to three-dimensional distributed displacement measurement (monitoring) device, thus can only monitor overlying strata, and cannot monitor overlying strata lifting, make simulated experiment result not comprehensive, untrue, inaccurate.
Summary of the invention
An object of the present invention is, there is provided that a kind of precision is high, there is automatic read data functions in experimentation, can realize in three-dimensional similar materials simulation test procedure, the full record of overlying strata motion process, and can monitor simultaneously the rising of overlying strata and descending motion rule displacement monitor.
The technical scheme that the present invention is adopted for achieving the above object is, a kind of displacement monitor, is characterized in that, comprises liquid reserve tank, high-pressure rubber pipe, many logical, micro-pressure sensing device, Acquisition Instrument and computing machine;
The both sides, top of described liquid reserve tank are respectively arranged with a bleeder vent and a liquid injection port;
The absolute altitude of the bottom liquid outlet of described liquid reserve tank higher than the top of the described framed structure part for holding similar materials, and is connected with described many logical inlets by pipeline;
Described micro-pressure sensing device quantity is some, and the feed liquor mouth of pipe of each micro-pressure sensing device is connected on described many logical different liquid outlets respectively by corresponding high-pressure rubber pipe;
Described micro-pressure sensing device comprises housing, and the described enclosure interior left and right sides is respectively pressure unit and liquid storage cylinder;
Described liquid storage cylinder and the described feed liquor mouth of pipe through;
Described liquid storage cylinder is provided with a micropressure sensor on the inwall of the side of pressure unit, above the opposite side of described liquid storage cylinder, wall is provided with a vent hole;
A shutoff bolt is screwed in described vent hole;
Described micropressure sensor is connected with described pressure unit communication, and described pressure unit is connected with described Acquisition Instrument communication by described data line;
Described Acquisition Instrument has Ethernet interface, for being connected with described computer communication by netting twine.
The technique effect that technique scheme is directly brought is, the similar materials that micro-pressure sensing device in displacement monitor is evenly embedded in variant layer is inner, in experimentation, can in good time, true and accurate, the basic data of the change in displacement of similar materials model inside detected in all directions, again by Acquisition Instrument collection, computer disposal after exporting, for experimenter visual in image find out that the liquid prosposition produced in similar materials simulation test experimentation moves, deflection and movement law.
The displacement measuring device of technique scheme, in three-dimensional similar materials simulation test procedure, micro-pressure sensing device in displacement monitor can not apply any external force to similar materials model, thus further ensures the accuracy of test findings;
The displacement measuring device of technique scheme, in three-dimensional similar materials simulation test procedure, collection, the transmission of its data are all synchronously carried out with process, thus achieve omnibearing monitoring of moving because of overlying strata caused in exploitation process, solve preferably " catastrophe point " monitoring existing in prior art less than technical matters;
In order to understand the present invention better, now describe the principle of work of displacement measuring device in three-dimensional similar materials simulation test procedure of technique scheme in detail:
In the mining process of coal seam, once displacement appears in micro-pressure sensing device in the vertical direction, the difference in height between the liquid level in itself and liquid reserve tank will change.Like this, in its liquid storage cylinder liquid produce and conduct the pressure value and will change.
By the displacement (amount) of this micro-pressure sensing device in the vertical direction, synchronously change into (liquid) pressure change (amount), detect in time through micropressure sensor again, transfer to computing machine through Acquisition Instrument collection, then by computer recording, output.
As can be seen from above-mentioned principle of work, the three-dimensional similar materials simulation test displacement measuring device of technique scheme, it utilizes fluid pressure to equal density and is multiplied by its this simple physics reason of height, dexterously by the change application of the pressure caused by this liquid level difference in micro-pressure sensing device, thus the problem of the complexity of inner for similar materials local displacement monitoring is changed into the detection of simple pressure signal and exports, the displacement measuring device of technique scheme not only can synchronously in time be monitored in three-dimensional similar materials simulation test procedure, the sinking that overlying strata may occur, can also in time synchronously, monitor the lifting that overlying strata may occur.
Further preferably, the liquid in above-mentioned liquid storage cylinder is water, salt solution or mercury.
The technique effect that this optimal technical scheme is directly brought is, can find out based on above-mentioned principle of work, utilize the liquid of various different densities, be convenient to experimentally accuracy class needs, or the situations such as the sensitivity of micropressure sensor, carry out the amplification of the caused pressure variety of liquid level difference change and scaled down flexible adjustment.Like this, both convenient operations, can ensure again the accuracy requirement needed for testing.
Further preferably, the rated insulation voltage value of above-mentioned high-pressure rubber pipe is more than 4MPa.
The technique effect that this optimal technical scheme is directly brought is that practical application experience shows, under usual experimental conditions, the pressure that high-pressure rubber pipe may afford is lower than 4MPa.The rated insulation voltage value selecting high-pressure rubber pipe is more than 4MPa, can effectively ensure, needed for normal experiment, there will not be and be crushed, and then the appearance of the problems such as accuracy to be tested in impact.
Further preferably, the shell material of above-mentioned micro-pressure sensing device is stainless steel 304 or tool steel.
The technique effect that this optimal technical scheme is directly brought is, because micro-pressure sensing device is directly embedded in the inside of similar materials, it needs the pressure born from top similar materials, select stainless steel 304 or tool steel main it is considered that, this bi-material all has higher hardness, and all has good processing characteristics.
Like this, can on limited processing cost basis, improve the rigidity of the housing of micro-pressure sensing device as far as possible, guarantee to there will not be in experimentation because be crushed, and then the appearance of the problem such as cause device malfunctioning.
Two of object of the present invention is, provides a kind of above-mentioned displacement monitor and the using method for three-dimensional similar materials simulation test thereof.
The present invention for the technical scheme realizing this object and adopt is, a kind of displacement monitor is used for the using method of three-dimensional similar materials simulation test, it is characterized in that, described displacement monitor with support the use for the framed structure part holding similar materials;
The described framed structure channel floor for holding similar materials, in the body structure without upper cover, comprises rectangular base, four root posts being vertically fixedly connected on base four corner position places respectively and the shifting board removably connected;
The similar materials of described body structure inside is layer structure, and in the vertical direction is divided into some layers successively;
Described column is drift angle angle steel outwardly, and two lateral surfaces of described angle steel evenly offer some screws;
Described shifting board quantity is some, and the two ends of each shifting board offer some through-hole respectively, and is bolted to connection the different layers high position on two lateral surfaces of described angle steel;
The side of each shifting board all evenly offers the strip breach of some quantity;
The similar materials that micro-pressure sensing device in described displacement monitor is evenly embedded in variant layer is inner, each data line, each high-pressure rubber pipe pass respectively from the corresponding strip breach the side of shifting board, and are arranged on the described remaining part for the outside holding the framed structure part of similar materials and link into an integrated entity;
The liquid outlet of described liquid reserve tank is positioned at described for holding the top of the framed structure atop part of similar materials;
Described using method comprises the following steps:
The first step, passes each data line and each high-pressure rubber pipe respectively successively, completes the assembling of displacement monitor in the both sides of shifting board successively from the corresponding strip breach each shifting board side;
Liquid reserve tank is suspended from certain altitude, with the top position making the liquid outlet of liquid reserve tank be positioned at the framed structure atop part for holding similar materials;
In liquid reserve tank, add appropriate liquid, open shutoff bolt on each micro-pressure sensing device when the relief port of liquid storage cylinder starts trickle with screwdriver successively, tighten shutoff bolt;
Second step, successively installs shifting board from bottom to top, and carries out the laying of similar materials, each micro-pressure sensing device in displacement monitor is evenly embedded in the inside of similar materials, until similar materials is all laid complete simultaneously;
3rd step, is cured to after its performance index reach condition needed for back production until similar materials, is all removed by shifting board, and open Acquisition Instrument and computing machine, utilize computing machine that the initial value of the pressure transducer in each micro-pressure sensing device is adjusted to 0 position;
And the parameter kind of experimentally required detection, carry out the optimum configurations of Acquisition Instrument;
4th step, getting working face along coal seam carries out back production experiment by outside to inside excavating to similar materials, Real-Time Monitoring and data acquisition are carried out to the misalignment of measuring point each in exploitation process, until test back production is complete and after waiting for certain hour, the experimental data required for being derived by computing machine and image.
Be preferably, on above-mentioned shifting board, uniform welding has some reinforcements.
The technique effect that this optimal technical scheme is directly brought is, on shifting board, uniform welding has some reinforcements to be also based on the basis of its intensity of guarantee, reduces the consideration of the cost of manufacture of main parts size as far as possible.
Further preferably, the number of plies of above-mentioned similar materials is five layers, is followed successively by base plate, coal seam, caving zone, fissure zone and warp damage from bottom to top.
The technique effect that technique scheme is directly brought is, operation steps is simple, it is easy to control, and experimental result is true, accurately, and intuitively.
In sum, the present invention, relative to prior art, has following beneficial effect:
1, simple and reasonable for structure, experimental result true and accurate, systematic error are little;
2, three-dimensional similar materials simulation test displacement measuring device of the present invention has automatic reading, and carries out the full writing function of overlying strata motion process; The collection of its data, transmission are all synchronously carried out with process, achieve omnibearing monitoring of moving because of overlying strata caused in exploitation process, solve preferably " catastrophe point " existing in prior art monitor less than technical matters;
3, three-dimensional similar materials simulation test displacement measuring device of the present invention, its experiment is simple to operate, not only can monitor overlying strata, can also monitor overlying strata lifting.
Accompanying drawing explanation
Fig. 1 is the structural representation of displacement measuring device of the present invention;
Fig. 2 is sectional structure (amplification) schematic diagram of micro-pressure sensing device of the present invention;
Fig. 3 is the framed structure part-structure schematic diagram for holding similar materials of the present invention;
Fig. 4 is the layer structure schematic diagram of similar materials of the present invention (model).
Description of reference numerals: 1, liquid reserve tank, 2, liquid injection port and gland bonnet, 3, bleeder vent, 4, high-pressure rubber pipe, 5, lead to, 6, micro-pressure sensing device more, 7, data line, 8, Acquisition Instrument, 9, netting twine, 10, computing machine, 11, pressure unit, 12, housing, 13, micropressure sensor, 14, liquid storage cylinder, 15, vent hole, 21, base, 22, column, 23, shifting board, 24, strip breach, 25, reinforcement, 31, base plate, 32, coal seam, 33, caving zone, 34, fissure zone, 35, warp damage.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
As shown in Figure 1 and Figure 2, displacement monitor of the present invention, is characterized in that, comprises liquid reserve tank 1, high-pressure rubber pipe 4, how logical 5, micro-pressure sensing device 6, Acquisition Instrument 8 and computing machine 10; Wherein the quantity of micro-pressure sensing device 6 is several, and the quantity of high-pressure rubber pipe 4 is equal with the quantity of micro-pressure sensing device 6, and one_to_one corresponding (connection).
The both sides, top of above-mentioned liquid reserve tank are respectively arranged with bleeder vent 3 and a liquid injection port 2;
The absolute altitude of the bottom liquid outlet of above-mentioned liquid reserve tank 1 higher than the top of the above-mentioned framed structure part for holding similar materials, and is connected with above-mentioned many inlets of logical 5 by pipeline;
Above-mentioned micro-pressure sensing device 6 is connected on above-mentioned many different liquid outlets of logical 5 by corresponding high-pressure rubber pipe 4;
Above-mentioned micro-pressure sensing device 6 comprises housing 12, and the above-mentioned inner left and right sides of housing 12 is respectively pressure unit 11 and liquid storage cylinder 14;
Above-mentioned liquid storage cylinder 14 is provided with a micropressure sensor 13 on the inwall of the side of pressure unit 11, above the opposite side of above-mentioned liquid storage cylinder 14, wall is provided with a vent hole 15;
A shutoff bolt is screwed in above-mentioned vent hole 15;
Above-mentioned micropressure sensor 13 is connected with the communication of above-mentioned pressure unit 11, and above-mentioned pressure unit 11 is connected with the communication of above-mentioned Acquisition Instrument 8 by above-mentioned data line 7; Above-mentioned Acquisition Instrument 8 has Ethernet interface, for being connected with above computer 10 communication by netting twine 9;
The liquid outlet of above-mentioned liquid reserve tank is positioned at the top of the above-mentioned framed structure atop part for holding similar materials.
Liquid in above-mentioned liquid storage cylinder is preferably water, salt solution or mercury.
Based on the principle of work of three-dimensional similar materials simulation test displacement measuring device of the present invention, utilize the liquid of various different densities, be convenient to experimentally accuracy class needs, or the situations such as the sensitivity of micropressure sensor, carry out the amplification of the caused pressure variety of liquid level difference change and scaled down flexible adjustment.Like this, both convenient operations, can ensure again the accuracy requirement needed for testing.
The rated insulation voltage value of above-mentioned high-pressure rubber pipe is preferably more than 4MPa.
Practical application experience shows, under usual experimental conditions, the pressure that high-pressure rubber pipe may afford is lower than 4MPa.The rated insulation voltage value selecting high-pressure rubber pipe is more than 4MPa, can effectively ensure, needed for normal experiment, there will not be and be crushed, and then the appearance of the problems such as accuracy to be tested in impact.
The shell material of above-mentioned micro-pressure sensing device is preferably stainless steel 304 or tool steel.
Because micro-pressure sensing device is directly embedded in the inside of similar materials, it needs the pressure born from top similar materials, select stainless steel 304 or tool steel main it is considered that, this bi-material all has higher hardness, and all has good processing characteristics.Like this, can on limited processing cost basis, improve the rigidity of the housing of micro-pressure sensing device as far as possible, guarantee to there will not be in experimentation because be crushed, and then the appearance of the problem such as cause device malfunctioning.
As shown in Figures 1 to 4, above-mentioned displacement measuring device is used for the using method of three-dimensional similar materials simulation test, it is characterized in that, displacement monitor with support the use for the framed structure part holding similar materials;
The described framed structure channel floor for holding similar materials, in the body structure without upper cover, comprises rectangular base, four root posts being vertically fixedly connected on base four corner position places respectively and the shifting board removably connected;
The similar materials of described body structure inside is layer structure, and in the vertical direction is divided into some layers successively;
Described column is drift angle angle steel outwardly, and two lateral surfaces of described angle steel evenly offer some screws;
Described shifting board 23 quantity is some, and the two ends of each shifting board offer some through-hole respectively, and is bolted to connection the different layers high position on two lateral surfaces of described angle steel;
The side of each shifting board all evenly offers the strip breach 24 of some quantity;
The similar materials that micro-pressure sensing device 6 in described displacement monitor is evenly embedded in variant layer is inner, each data line, each high-pressure rubber pipe pass respectively from the corresponding strip breach the side of shifting board 23, and are arranged on the described remaining part for the outside holding the framed structure part of similar materials and link into an integrated entity;
The liquid outlet of described liquid reserve tank 1 is positioned at described for holding the top of the framed structure atop part of similar materials;
Described using method comprises the following steps:
The first step, passes each data line and each high-pressure rubber pipe respectively successively, completes the assembling of displacement monitor in the both sides of shifting board successively from the corresponding strip breach each shifting board side;
Liquid reserve tank 1 is suspended from certain altitude, with the top position making the liquid outlet of liquid reserve tank be positioned at the framed structure atop part for holding similar materials;
In liquid reserve tank 1, add appropriate liquid, open shutoff bolt on each micro-pressure sensing device 6 when the relief port 15 of liquid storage cylinder starts trickle with screwdriver successively, tighten shutoff bolt;
Second step,, successively shifting board is installed from bottom to top, and carries out the laying of the similar materials of this layer, each micro-pressure sensing device 6 in displacement monitor is evenly embedded in the inside of the similar materials of this layer, until similar materials is all laid complete simultaneously;
3rd step, be cured to after its performance index reach condition needed for back production until similar materials, shifting board is all removed, and open Acquisition Instrument 8 and computing machine 10, utilize computing machine 10 to return to zero to each micro-pressure sensing device 6, the initial value of the pressure transducer in each micro-pressure sensing device 6 is adjusted to 0 position;
And the parameter kind of experimentally required detection, carry out the optimum configurations of Acquisition Instrument;
4th step, back production experiment is carried out to similar materials, Real-Time Monitoring and data acquisition are carried out to the misalignment of measuring point each in exploitation process, until test back production is complete and after waiting for certain hour, derive required experimental data and image by computing machine 10.
As shown in Figure 3, Figure 4, the similar materials that micro-pressure sensing device 6 in above-mentioned displacement monitor is evenly embedded in variant layer is inner, each data line, each high-pressure rubber pipe pass respectively from the corresponding strip breach the side of shifting board, link into an integrated entity with the remaining part of the outside being arranged on the above-mentioned framed structure part for holding similar materials.
On above-mentioned shifting board, uniform welding has some reinforcements.
On shifting board, uniform welding has some reinforcements to be also based on the basis of its intensity of guarantee, reduces the consideration of the cost of manufacture of main parts size as far as possible.
The number of plies of above-mentioned similar materials (model) is five layers, is followed successively by base plate 31, coal seam 32, caving zone 33, fissure zone 34 and warp damage 35 from bottom to top; Each micro-pressure sensing device 6 is evenly embedded in the inside of the similar materials of each layer.
Claims (7)
1. a displacement monitor, is characterized in that, comprises liquid reserve tank, high-pressure rubber pipe, many logical, micro-pressure sensing device, Acquisition Instrument and computing machine;
The both sides, top of described liquid reserve tank are respectively arranged with a bleeder vent and a liquid injection port;
The absolute altitude of the bottom liquid outlet of described liquid reserve tank higher than the top of the described framed structure part for holding similar materials, and is connected with described many logical inlets by pipeline;
Described micro-pressure sensing device quantity is some, and the feed liquor mouth of pipe of each micro-pressure sensing device is connected on described many logical different liquid outlets respectively by corresponding high-pressure rubber pipe;
Described micro-pressure sensing device comprises housing, and the described enclosure interior left and right sides is respectively pressure unit and liquid storage cylinder;
Described liquid storage cylinder and the described feed liquor mouth of pipe through;
Described liquid storage cylinder is provided with a micropressure sensor on the inwall of the side of pressure unit, above the opposite side of described liquid storage cylinder, wall is provided with a vent hole;
A shutoff bolt is screwed in described vent hole;
Described micropressure sensor is connected with described pressure unit communication, and described pressure unit is connected with described Acquisition Instrument communication by described data line;
Described Acquisition Instrument has Ethernet interface, for being connected with described computer communication by netting twine.
2. displacement monitor according to claim 1, the liquid in described liquid storage cylinder is water, salt solution or mercury.
3. displacement monitor according to claim 1, the rated insulation voltage value of described high-pressure rubber pipe is more than 4MPa.
4. displacement monitor according to claim 1, the shell material of described micro-pressure sensing device is stainless steel 304 or tool steel.
5. displacement monitor as claimed in claim 1 is used for the using method of three-dimensional similar materials simulation test, it is characterized in that, described displacement monitor with support the use for the framed structure part holding similar materials;
The described framed structure channel floor for holding similar materials, in the body structure without upper cover, comprises rectangular base, four root posts being vertically fixedly connected on base four corner position places respectively and the shifting board removably connected;
The similar materials of described body structure inside is layer structure, and in the vertical direction is divided into some layers successively;
Described column is drift angle angle steel outwardly, and two lateral surfaces of described angle steel evenly offer some screws;
Described shifting board quantity is some, and the two ends of each shifting board offer some through-hole respectively, and is bolted to connection the different layers high position on two lateral surfaces of described angle steel;
The side of each shifting board all evenly offers the strip breach of some quantity;
The similar materials that micro-pressure sensing device in described displacement monitor is evenly embedded in variant layer is inner, each data line, each high-pressure rubber pipe pass respectively from the corresponding strip breach the side of shifting board, and are arranged on the described remaining part for the outside holding the framed structure part of similar materials and link into an integrated entity;
The liquid outlet of described liquid reserve tank is positioned at described for holding the top of the framed structure atop part of similar materials;
Described using method comprises the following steps:
The first step, passes each data line and each high-pressure rubber pipe respectively successively, completes the assembling of displacement monitor in the both sides of shifting board successively from the corresponding strip breach each shifting board side;
Liquid reserve tank is suspended from certain altitude, with the top position making the liquid outlet of liquid reserve tank be positioned at the framed structure atop part for holding similar materials;
In liquid reserve tank, add appropriate liquid, open shutoff bolt on each micro-pressure sensing device when the relief port of liquid storage cylinder starts trickle with screwdriver successively, tighten shutoff bolt;
Second step, successively installs shifting board from bottom to top, and carries out the laying of similar materials, each micro-pressure sensing device in displacement monitor is evenly embedded in the inside of similar materials, until similar materials is all laid complete simultaneously;
3rd step, is cured to after its performance index reach condition needed for back production until similar materials, is all removed by shifting board, and open Acquisition Instrument and computing machine, utilize computing machine that the initial value of the pressure transducer in each micro-pressure sensing device is adjusted to 0 position;
And the parameter kind of experimentally required detection, carry out the optimum configurations of Acquisition Instrument;
4th step, getting working face along coal seam carries out back production experiment by outside to inside excavating to similar materials, Real-Time Monitoring and data acquisition are carried out to the misalignment of measuring point each in exploitation process, until test back production is complete and after waiting for certain hour, the experimental data required for being derived by computing machine and image.
6. displacement monitor according to claim 5 is used for the using method of three-dimensional similar materials simulation test, and on described shifting board, uniform welding has the reinforcement of some quantity.
7. displacement monitor according to claim 5 is used for the using method of three-dimensional similar materials simulation test, and the number of plies of described similar materials is five layers, is followed successively by base plate, coal seam, caving zone, fissure zone and warp damage from bottom to top.
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| CN107014332A (en) * | 2017-04-11 | 2017-08-04 | 广东工业大学 | A kind of detection method and device of disk edge abrasion |
| CN110702062A (en) * | 2019-09-06 | 2020-01-17 | 山东科技大学 | Plane movement deformation measurement system and application thereof in two-dimensional analog simulation experiment |
| CN110702062B (en) * | 2019-09-06 | 2020-11-17 | 山东科技大学 | Plane movement deformation measurement system and application thereof in two-dimensional analog simulation experiment |
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