CN102830172A - Coal rock intensity distribution testing device and system and method for analyzing coal rock intensity distribution - Google Patents
Coal rock intensity distribution testing device and system and method for analyzing coal rock intensity distribution Download PDFInfo
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- CN102830172A CN102830172A CN2012103097283A CN201210309728A CN102830172A CN 102830172 A CN102830172 A CN 102830172A CN 2012103097283 A CN2012103097283 A CN 2012103097283A CN 201210309728 A CN201210309728 A CN 201210309728A CN 102830172 A CN102830172 A CN 102830172A
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Abstract
The invention relates to the field of mining and coal bed methane development and research, in particular to a coal rock intensity distribution testing device and a system and a method for analyzing coal rock intensity distribution. The coal rock intensity distribution testing device comprises an experiment tank for holding experimental samples and an ultrasonic system, the experiment tank comprises a bottom wall and enclosure walls, the enclosure walls include more than two fixed enclosure walls and movable enclosure walls, and the movable enclosure walls are arranged oppositely to the fixed enclosure walls and capable of getting distant from or close to the opposite fixed enclosure walls linearly and are respectively connected with horizontal loading mechanisms used for driving the movable enclosure walls to move, and a loading body is arranged above the experiment tank and connected with a vertical loading mechanism. The ultrasonic system comprises ultrasonic emitting points and ultrasonic receiving points, wherein the ultrasonic emitting points are distributed on the fixed enclosure walls and the bottom wall separately, and the ultrasonic points are arranged on the corresponding movable enclosure walls and the loading body and opposite to the ultrasonic emitting points. The coal rock intensity distribution testing device can indicate coal rock intensity distribution, acquire crack initiation and extending laws of cracks of coal rocks and provide theoretical instructions for modification of fracturing of reservoir stratum.
Description
Technical field
The present invention relates to mining, cbm development research field, especially a kind of coal petrography intensity distributions proving installation and coal petrography intensity distributions analytic system and method.
Background technology
The reservoir fracturing transformation is the perviousness that improves coal seam reservoirs, increases a kind of important measures of coal bed gas well production capacity.The inhomogeneity that the coal petrography fissure system distributes, the inner otherness of forming etc. have determined coal petrography intensity to have certain otherness; These all will cause in fracturing process crack to play seam, extend the difference of rule; Because having little understanding to the intensity distributions of coal petrography own; Cause hydraulic fracturing anti-reflection mechanism not clear, many engineering constructions generally are based on experience, lack theoretical direction.On the other hand; In conventional coal petrography loading experiment, the permeability test experiments instrument, because the limitation of experimental provision can only be tested the sound wave of monoblock coal sample; Can not test coal petrography intensity from littler yardstick aspect; Therefore, can't grasp in the loading procedure formation in crack, expansion, extension Changing Pattern.Experimental result with such instructs engineering construction, causes between theory and the reality otherness obvious, has influenced the effect of on-the-spot reservoir reconstruction to a certain extent, even a lot of place has caused the failure of engineering.
How coal petrography intensity to be carried out meticulous depiction from the small scale aspect; Find out under different stress conditions; Relation in the loading procedure between coal petrography intensity distributions and crack crack initiation, extension, the Changing Pattern, and then instruct on-the-spot reservoir reconstruction, then be the difficult problem that pendulum needs to be resolved hurrily in face of us.
Summary of the invention
To in the reservoir reconstruction process because the crack is played seam, expansion, is extended rule and fail to understand, be difficult to take measures targetedly and the conventionally test device can not carry out the problem that the coal petrography microstrength is tested under the varying level stress according to the reservoir characteristics.The object of the present invention is to provide a kind of coal petrography intensity distributions proving installation; Can test coal petrography appearance under varying level stress in the loading procedure through this method and apparatus; The coal petrography intensity distributions situation at each position; And then grasp coal petrography the crack crack initiation, extend rule, for the reservoir fracturing transformation provides guidance.
Simultaneously, the method that the present invention also aims to that the coal petrography intensity distributions analytic system of using said apparatus is provided and use this analytic system analysis coal petrography intensity distributions.
In order to address the above problem; Coal petrography intensity distributions proving installation of the present invention adopts following technical scheme: coal petrography intensity distributions proving installation; The experiment cylinder that comprises ultrasonic system and be used to hold laboratory sample; Said experiment cylinder comprises diapire and leg, said leg comprise more than two fixing leg and be oppositely arranged with said fixedly leg and can along straight line away from or near the movable leg of fixedly leg on the other side, said movable leg is connected with separately and is used to order about its movable horizontal load maintainer; The top of experiment cylinder is provided with and adds carrier, adds carrier and is connected with vertical load maintainer; Said ultrasonic system comprises ultrasonic emitting point and be located at corresponding movable leg and add ultrasound wave acceptance point carrier on relative with ultrasonic emitting point that is divided on the fixedly leg and diapire.
Said horizontal load maintainer is the hydraulic telescopic machanism that is fixedly installed on the corresponding movable leg outside.
The outside of said movable leg is provided with uncovered block; The opening of said block is towards the movable leg of correspondence; The lateral surface of movable leg is provided with the plate of pegging graft and cooperating with corresponding block; The cooperation of on the activity direction of respective activity leg, leading of said plate and corresponding block, said hydraulically extensible structure is made up of with corresponding block said plate.
Offer the slot that supplies another insertion on one in plate on the said movable leg and the corresponding with it block, pass through said slot grafting between block and the corresponding tongue.
Said fixedly leg and movable leg respectively have two; Two fixedly leg is adjacent and have 90 ° angle between the two; Each fixedly the ultrasonic emitting point on leg and the diapire respectively have more than two, each fixedly the ultrasonic emitting point on leg and the diapire all be uniformly distributed with setting.
Coal petrography intensity distributions analytic system of the present invention adopts following technical scheme: comprise proving installation and data handling system; Proving installation comprises ultrasonic system and is used to hold the experiment cylinder of laboratory sample; Said experiment cylinder comprises diapire and leg; Said leg comprise more than two fixing leg and be oppositely arranged with said fixedly leg and can along straight line away from or near the movable leg of fixedly leg on the other side; Said movable leg is connected with separately and is used to order about its movable horizontal load maintainer, and the top of experiment cylinder is provided with and adds carrier, adds carrier and is connected with vertical load maintainer; Said ultrasonic system comprises ultrasonic emitting point and be located at corresponding movable leg and add ultrasound wave acceptance point carrier on relative with ultrasonic emitting point that is divided on the fixedly leg and diapire; Said data handling system comprises and is used to the data acquisition software and the data conversion software that write down the signal of said ultrasonic system and be converted into the laboratory sample intensive parameter; Said data acquisition software and data conversion software are arranged in a computing machine, and said computing machine is connected with the display that is used to show the laboratory sample intensive parameter.
Said horizontal load maintainer is the hydraulic telescopic machanism that is fixedly installed on the corresponding movable leg outside.
The outside of said movable leg is provided with uncovered block; The opening of said block is towards the movable leg of correspondence; The lateral surface of movable leg is provided with the plate of pegging graft and cooperating with corresponding block; The cooperation of on the activity direction of respective activity leg, leading of said plate and corresponding block, said hydraulically extensible structure is made up of with corresponding block said plate.
Said fixedly leg and movable leg respectively have two; Two fixedly leg is adjacent and have 90 ° angle between the two; Said each fixedly the ultrasonic emitting point on leg and the diapire respectively have more than two, each fixedly the ultrasonic emitting point on leg and the diapire all be uniformly distributed with setting.
The method that the above-mentioned analytic system of usefulness of the present invention is analyzed the coal petrography intensity distributions adopts following technical scheme: this method may further comprise the steps: 1) laboratory sample is positioned in the experiment cylinder; 2) open ultrasonic system and data handling system, the sound wave situation before the record experiment; 3) the horizontal load maintainer of unlatching also increases load to setting value gradually; 4) under the different horizontal load, open vertical load maintainer; 5) through data handling system record ultrasonic signal and calculating, convert ultrasonic signal into the laboratory sample intensive parameter; 6) analyze different distortion stage laboratory sample intensity distributions situation through the result of calculation of step 5).
Because the form that the experiment cylinder of coal petrography intensity distributions proving installation of the present invention adopts fixing leg to combine with movable leg; Movable leg all is connected with horizontal load maintainer; And the top of experiment cylinder is provided with vertical load maintainer; The fixedly leg and the diapire of experiment cylinder are provided with said ultrasonic emitting point, movable leg and add carrier and be provided with the ultrasound wave acceptance point corresponding with ultrasonic emitting point; Therefore; When testing, can be through said movable leg and corresponding with it horizontal load maintainer simulation coal petrography environment, through vertical load maintainer and add carrier and simulate the pressure break situation; In the process of test specimen compressive deformation, pass through the ultrasonic system distortion situation of monitoring test sample constantly simultaneously; Thereby indicate coal petrography intensity distributions situation, and then grasp crack crack initiation, the extension rule of coal petrography, for the reservoir fracturing transformation provides theoretical direction.
Description of drawings
Fig. 1 is the structural representation of the embodiment 1 of coal petrography intensity distributions proving installation of the present invention;
Fig. 2 is the A-A cut-open view of Fig. 1;
Fig. 3 is the fixing distribution schematic diagram of the ultrasonic emitting point on the leg;
Fig. 4 is the distribution schematic diagram of the ultrasound wave acceptance point on the movable leg;
Fig. 5 is the top structure synoptic diagram of confined pressure case;
Fig. 6 is the structural representation of the embodiment 1 of coal petrography intensity distributions analytic system of the present invention.
Embodiment
The embodiment 1 of coal petrography intensity distributions proving installation of the present invention shown in Fig. 1-5, comprises ultrasonic system and experiment cylinder 11; Experiment cylinder 11 is used to place test specimen 12, and it comprises diapire 11-1 and is located at the leg on the diapire 11-1, in the present embodiment; Diapire 11-1 is fixing; Leg has four and be divided into fixedly leg 11-2 and movable leg 11-3, and fixedly leg 11-2 and movable leg 11-3 respectively have two, four legs surround the square bodily form and each fixedly leg all be oppositely arranged with a movable leg; The outside of each movable leg is equipped with a uncovered block 13; The opening of block 13 is towards corresponding with it movable leg, and movable leg can be moved according to the distortion of test specimen, and the lateral surface of movable leg 11-3 is provided with the tailgate 14 to the block extension of correspondence; Tailgate 14 is positioned at the edge of corresponding movable leg; The tailgate 14 that wherein is positioned at the top is provided with and protects eaves 14-1, and two (like the Fig. 2) that links to each other with top board in the boxboard of block 13 adopts doubling plate, and the interlayer between the doubling plate forms slot; Be positioned in the boxboard of block 13 one of top be provided with corresponding tailgate on protect the step surface that eaves coincide; In the tailgate 14 in corresponding with the double-deck boxboard of block two interlayers that insert double-deck boxboards, the step surface that is positioned on the top boxboard that protects eaves and corresponding block of a tailgate of top is slidingly matched, thereby makes the sealing that still can guarantee tailgate 14 and block 13 cooperation places as movable leg 11-3 within the specific limits during activity; In order to guarantee the sealing of tailgate 14 and corresponding block 13 cooperation places, the cooperation place of the two is equipped with sealing joint strip, and block 13 also is connected with high-pressure hydraulic pump 15; High-pressure hydraulic pump 15 is connected with water tank 16; So far, the tailgate of movable leg 11-3 forms confined pressure case, i.e. hydraulic telescopic machanism jointly with corresponding block; This hydraulic telescopic machanism form order about corresponding movable leg near or away from the horizontal load maintainer of fixedly leg on the other side; Connect through pipeline between high-pressure hydraulic pump 15 and the corresponding block, be serially connected with variable valve 17 and tensimeter 18 on this pipeline, through the size of the pressure in the corresponding block of variable valve 17 scalable; The top of experiment cylinder 11 is provided with and adds carrier 19; The upside that adds carrier 19 is connected with vertical load maintainer 20, and vertical load maintainer 20 can adopt conventional load maintainer such as hydraulic cylinder, cylinder screw leading screw etc., in the present embodiment; Vertical load maintainer adopts hydraulic cylinder; It is pointed out that in order to guarantee to test the distortion that cylinder can not have influence on laboratory sample the length of movable leg 11-3 and wide is less than the length of laboratory sample 30 and wide; Add the carrier size equally also less than sample, use rubber blanket filling space at its edge; Ultrasonic system comprises that ultrasonic generator 21 is (external; Commercially available acquisition), ultrasonic emitting point 22 and ultrasound wave acceptance point 23; Ultrasonic emitting point 22 is laid on the diapire and fixed wall of experiment cylinder 11; Wherein the ultrasonic emitting point on diapire and each fixed wall all is evenly to lay, and the ultrasound wave acceptance point is corresponding one by one with ultrasonic emitting point and be oppositely arranged, and it is positioned at movable leg and adds on the carrier; In the present embodiment, ultrasonic emitting point and ultrasound wave acceptance point respectively have 48, and each fixedly respectively has 16 ultrasonic emitting points on leg and the diapire, each movable leg and add 16 ultrasound wave acceptance points are respectively arranged on the carrier.
During use; At first test specimen is put into the experiment cylinder, open ultrasonic generator and the preceding sound wave situation of record experiment then, open high-pressure hydraulic pump; Increase the loading force of horizontal load maintainer gradually with the speed of setting; The loading force that horizontal load maintainer is applied through the tensimeter of observing correspondence reaches requirement of experiment, opens vertical load maintainer then, in this simultaneously; Ultrasonic emitting point emitting sound wave signal propagates into corresponding ultrasound wave acceptance point through test specimen, thus the intensity distributions situation of time difference test experiments sample that just can be through detecting ultrasonic signal.
In other embodiment of coal petrography intensity distributions proving installation of the present invention; Horizontal load maintainer described in the foregoing description 1 can also adopt hydraulically extensible cylinder, cylinder or screw screw mechanism etc.; In such cases, described tensimeter available pressure sensor replaces; The quantity of the fixedly leg of said experiment cylinder can also be for more than two, in such cases, the quantity of the leg of increase activity accordingly and assurance activity leg and fixedly leg be oppositely arranged; What said water tank and water pump all can be that device carries also can be the working site; Also can make the two form hydraulic telescopic machanism through the mode in the opening that the tailgate on the movable leg is inserted block.
The embodiment 1 of coal petrography intensity distributions analytic system of the present invention; As shown in Figure 6, this analytic system comprises coal petrography intensity distributions proving installation and data number reason system, and said intensity distributions proving installation is with identical with the structure of the embodiment 1 of above-mentioned coal petrography intensity distributions proving installation; Said data handling system comprises the computing machine 30 that is connected with the ultrasonic system of proving installation through cable; Be provided with in the computing machine according to acquisition software and data conversion software, the two is used to write down the signal of ultrasonic system and is converted into the laboratory sample intensive parameter, in addition; Computing machine 30 also is connected with display, and display is used to show test specimen intensity; During system works; Computing machine 30 receives and writes down the acoustic signals of ultrasonic system and be converted into interval transit time, draws series of equations according to test result, equation is derived accordingly again; Change into the form of calculation of matrix; Mainly adopt C# language to program then, matrix computations is changed into the language that computing machine can be discerned, just realized interval transit time is converted into test specimen intensity through programming like this; Form of calculation and the C# language programming of wherein above-mentionedly draw equation, deriving, change into matrix are prior art, will not give unnecessary details here.Adopt the method for mean value here, represent the test value of center according to the mean value of the test value that closes on four points, wherein in programming computation process in order to avoid test errors as far as possible; Suppose that the interval transit time that same small test specimen goes up is identical in any direction; Then as required coal sample is divided into 27 little coal samples, can lists 27 equations, adopt the computing method of matrix that equation is changed into matrix form according to interval transit time; Adopt C# developing instrument coding; And then can calculate the intensity of each little coal sample, draw in the vertical charger loading procedure regularity of distribution of different phase test specimen microstrength at last.
In other embodiment of coal petrography intensity distributions analytic system of the present invention; Horizontal load maintainer described in the embodiment 1 of above-mentioned coal petrography intensity distributions analytic system can also adopt hydraulically extensible cylinder, cylinder or screw screw mechanism etc.; In such cases, described tensimeter available pressure sensor replaces; The quantity of the fixedly leg of said experiment cylinder can also be for more than two, in such cases, the quantity of the leg of increase activity accordingly and assurance activity leg and fixedly leg be oppositely arranged; What said water tank and water pump all can be that device carries also can be the working site; Also can make the two form hydraulic telescopic machanism through the mode in the opening that the tailgate on the movable leg is inserted block.
The embodiment 1 of coal petrography intensity distributions analytical approach of the present invention adopts the embodiment 1 of coal petrography intensity distributions analytic system of the present invention, may further comprise the steps: 1) laboratory sample is positioned in the experiment cylinder; 2) open ultrasonic system and data handling system, the sound wave situation before the record experiment; 3) the horizontal load maintainer of unlatching also increases load to setting value gradually; 4) under the different horizontal load, open vertical load maintainer; 5) through data handling system record ultrasonic signal and calculating, convert ultrasonic signal into the laboratory sample intensive parameter; 6) analyze different distortion stage laboratory sample intensity distributions situation through the result of calculation of step 5).
Claims (10)
1. coal petrography intensity distributions proving installation; It is characterized in that; The experiment cylinder that comprises ultrasonic system and be used to hold laboratory sample; Said experiment cylinder comprises diapire and leg, said leg comprise more than two fixing leg and be oppositely arranged with said fixedly leg and can along straight line away from or near the movable leg of fixedly leg on the other side, said movable leg is connected with separately and is used to order about its movable horizontal load maintainer; The top of experiment cylinder is provided with and adds carrier, adds carrier and is connected with vertical load maintainer; Said ultrasonic system comprises ultrasonic emitting point and be located at corresponding movable leg and add ultrasound wave acceptance point carrier on relative with ultrasonic emitting point that is divided on the fixedly leg and diapire.
2. coal petrography intensity distributions proving installation according to claim 1 is characterized in that, said horizontal load maintainer is the hydraulic telescopic machanism that is fixedly installed on the corresponding movable leg outside.
3. coal petrography intensity distributions proving installation according to claim 2; It is characterized in that; The outside of said movable leg is provided with uncovered block, and the opening of said block is towards the movable leg of correspondence, and the lateral surface of movable leg is provided with the plate of pegging graft and cooperating with corresponding block; The cooperation of on the activity direction of respective activity leg, leading of said plate and corresponding block, said hydraulically extensible structure is made up of with corresponding block said plate.
4. coal petrography intensity distributions proving installation according to claim 3; It is characterized in that; Offer the slot that supplies another insertion on one in plate on the said movable leg and the corresponding with it block, pass through said slot grafting between block and the corresponding tongue.
5. according to any described coal petrography intensity distributions proving installation of claim 1-4; It is characterized in that; Said fixedly leg and movable leg respectively have two; Two fixedly leg is adjacent and have 90 ° angle between the two, each fixedly the ultrasonic emitting point on leg and the diapire respectively have more than two, each fixedly the ultrasonic emitting point on leg and the diapire all be uniformly distributed with setting.
6. coal petrography intensity distributions analytic system; It is characterized in that; Comprise proving installation and data handling system, proving installation comprises ultrasonic system and is used to hold the experiment cylinder of laboratory sample that said experiment cylinder comprises diapire and leg; Said leg comprise more than two fixing leg and be oppositely arranged with said fixedly leg and can along straight line away from or near the movable leg of fixedly leg on the other side; Said movable leg is connected with separately and is used to order about its movable horizontal load maintainer, and the top of experiment cylinder is provided with and adds carrier, adds carrier and is connected with vertical load maintainer; Said ultrasonic system comprises ultrasonic emitting point and be located at corresponding movable leg and add ultrasound wave acceptance point carrier on relative with ultrasonic emitting point that is divided on the fixedly leg and diapire; Said data handling system comprises and is used to the data acquisition software and the data conversion software that write down the signal of said ultrasonic system and be converted into the laboratory sample intensive parameter; Said data acquisition software and data conversion software are arranged in a computing machine, and said computing machine is connected with the display that is used to show the laboratory sample intensive parameter.
7. coal petrography intensity distributions analytic system according to claim 6 is characterized in that, said horizontal load maintainer is the hydraulic telescopic machanism that is fixedly installed on the corresponding movable leg outside.
8. coal petrography intensity distributions analytic system according to claim 7; It is characterized in that; The outside of said movable leg is provided with uncovered block, and the opening of said block is towards the movable leg of correspondence, and the lateral surface of movable leg is provided with the plate of pegging graft and cooperating with corresponding block; The cooperation of on the activity direction of respective activity leg, leading of said plate and corresponding block, said hydraulically extensible structure is made up of with corresponding block said plate.
9. according to any described coal petrography intensity distributions analytic system of claim 6-8; It is characterized in that; Said fixedly leg and movable leg respectively have two; Two fixedly leg is adjacent and have 90 ° angle between the two, said each fixedly the ultrasonic emitting point on leg and the diapire respectively have more than two, each fixedly the ultrasonic emitting point on leg and the diapire all be uniformly distributed with setting.
10. with the method for the described device analysis coal petrography of claim 6 intensity distributions, it is characterized in that, may further comprise the steps: 1) laboratory sample is positioned in the experiment cylinder; 2) open ultrasonic system and data handling system, the sound wave situation before the record experiment; 3) the horizontal load maintainer of unlatching also increases load to setting value gradually; 4) under the different horizontal load, open vertical load maintainer; 5) through data handling system record ultrasonic signal and calculating, convert ultrasonic signal into the laboratory sample intensive parameter; 6) analyze different distortion stage laboratory sample intensity distributions situation through the result of calculation of step 5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210309728.3A CN102830172B (en) | 2012-08-28 | 2012-08-28 | Coal rock intensity distribution testing device and system and method for analyzing coal rock intensity distribution |
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| CN201210309728.3A CN102830172B (en) | 2012-08-28 | 2012-08-28 | Coal rock intensity distribution testing device and system and method for analyzing coal rock intensity distribution |
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| CN102830172B CN102830172B (en) | 2014-09-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558288A (en) * | 2013-11-19 | 2014-02-05 | 中国科学院武汉岩土力学研究所 | Single-transmission multi-receiving cross-borehole acoustic wave testing method |
| CN109883921A (en) * | 2019-03-15 | 2019-06-14 | 西南石油大学 | Conglomerate rock anatonosis measuring system and method |
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| US5265461A (en) * | 1991-03-19 | 1993-11-30 | Exxon Production Research Company | Apparatuses and methods for measuring ultrasonic velocities in materials |
| CN201382876Y (en) * | 2009-03-23 | 2010-01-13 | 长春试验机研究所有限公司 | Similar model test device for rock plane |
| CN101982753A (en) * | 2010-10-18 | 2011-03-02 | 山东科技大学 | Testing device for coal gangue three-dimensional compression physical test |
| CN102519784A (en) * | 2011-12-16 | 2012-06-27 | 武汉大学 | Method for determining rock conjugate damage strength through adopting supersonic waves |
| CN202770811U (en) * | 2012-08-28 | 2013-03-06 | 河南理工大学 | Coal rock intensity distribution testing device and analysis system thereof |
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- 2012-08-28 CN CN201210309728.3A patent/CN102830172B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5265461A (en) * | 1991-03-19 | 1993-11-30 | Exxon Production Research Company | Apparatuses and methods for measuring ultrasonic velocities in materials |
| CN201382876Y (en) * | 2009-03-23 | 2010-01-13 | 长春试验机研究所有限公司 | Similar model test device for rock plane |
| CN101982753A (en) * | 2010-10-18 | 2011-03-02 | 山东科技大学 | Testing device for coal gangue three-dimensional compression physical test |
| CN102519784A (en) * | 2011-12-16 | 2012-06-27 | 武汉大学 | Method for determining rock conjugate damage strength through adopting supersonic waves |
| CN202770811U (en) * | 2012-08-28 | 2013-03-06 | 河南理工大学 | Coal rock intensity distribution testing device and analysis system thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103558288A (en) * | 2013-11-19 | 2014-02-05 | 中国科学院武汉岩土力学研究所 | Single-transmission multi-receiving cross-borehole acoustic wave testing method |
| CN109883921A (en) * | 2019-03-15 | 2019-06-14 | 西南石油大学 | Conglomerate rock anatonosis measuring system and method |
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| CN102830172B (en) | 2014-09-17 |
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