CN107102205A - Coal petrography adsorption-desorption integral resistance rate measuring method - Google Patents
Coal petrography adsorption-desorption integral resistance rate measuring method Download PDFInfo
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- CN107102205A CN107102205A CN201710221311.4A CN201710221311A CN107102205A CN 107102205 A CN107102205 A CN 107102205A CN 201710221311 A CN201710221311 A CN 201710221311A CN 107102205 A CN107102205 A CN 107102205A
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
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Abstract
The invention discloses a kind of coal petrography adsorption-desorption integral resistance rate measuring method, coal petrography two ends borehole is loaded coal petrography jar special is integrally put into after measuring electrode copper sheet, constant temperature water bath apparatus keeps infiltration temperature in coal petrography to be preset temperature value；The second control valve is opened, gas mass flow gauge detection stream enters the device in Gas scale of construction of coal petrography, and resistivity measuring instrument determines the resistivity value under different gas adsorption contents；Close the second control valve, open the 3rd control valve, using oil extraction method all automatic measurement coal petrography desorption of mash gas content, resistivity measuring instrument measures coal petrography resistivity value in real time；Computer receives the relation of the data of gas mass flow gauge, resistivity measuring instrument and control circuit box transmission, research coal petrography gas bearing capacity and resistivity.This method advantages of simple, measurement is accurate, and the mechanism that change in resistance influences is laid the foundation for research coal petrography gas adsorption desorption.
Description
Technical field
It is to determine coal petrography to adsorb solution to coal petrography specifically the present invention relates to coal bed gas storage Rock physical analysis field
A kind of measuring method of change in resistance Influencing Mechanism research.
Background technology
With the increase of China's coal-mine mining depth and exploitation difficulty, coal and gas prominent is increasingly serious.Coal petrography gas
In the presence of coal petrography resistivity is often changed, Accurate Determining simultaneously analyzes the pass that coal petrography gas adsorption desorbs content and coal petrography resistivity
System, is important foundation for evaluating coal mining face gas prediction of gas emission, gas outbursts Prediction, be also administer coal with
The fundamental parameter of gas burst accident.
The method that China determines the desorption of coal petrography gas adsorption mainly has volumetric method, gravimetric method and drainage.Volumetric method is by coal
Rock is placed in closed system, under different methane gas pressure, and coal petrography gas bearing capacity, but unit weight are calculated according to equation of gaseous state
Method has significant limitation in measurement gas adsorption desorption, it is impossible to accurately measure the gas adsorption desorption of a variety of particle coal samples,
Bad adaptability；Gravimetric method is mainly made up of electromagnetic suspension system balance, high-pressure sealed cylinder and insulating box, and the apparatus cost is very high
Expensive, application is few at present；Drainage is that the coal petrography methane gas for gathering special coal sample tank guides to the buret equipped with liquid, according to
Liquid volume change obtains methane gas content in buret, applies most in China's coal and study gas at present, but coal petrography
Adsorption-desorption process generally requires 48 hours or even several weeks, it is desirable to have professional reads data and simultaneously recorded.China determines coal petrography
The method of resistivity mainly using the detection of DC resistivity measurements instrument, DC resistivity measurements instrument mainly include coal petrography jar special,
Precision digital pressure gauge, instrument for measuring DC resistance and constant temperature water bath apparatus, the apparatus structure are simple, easy to use.Measure simultaneously
Gas adsorption desorbs content and the instrument research of coal petrography resistivity is in blank field in China, therefore proposes a kind of method measurement coal
Corresponding coal petrography resistivity value in rock gas adsorption desorption process, influences for research coal petrography gas bearing capacity on coal seam change in resistance
Mechanism is laid a good foundation.
The content of the invention
It is an object of the invention to provide a kind of coal petrography adsorption-desorption integral resistance rate measuring method, it can measure simultaneously
The value of coal petrography adsorption-desorption content and coal petrography resistivity, can guarantee that the gas adsorption desorption of measurement coal petrography with coal petrography change in resistance again
The reliability and accuracy of law-analysing result of study, to solve the problems mentioned in the above background technology.
The coal petrography adsorption-desorption integral resistance rate measuring method that the present invention is provided, comprises the following steps：
S1：Coal rock specimen is subjected to encapsulation process in simulation pit mining condition；
S2：Coal petrography jar special is put into constant temperature water bath apparatus, sets the temperature of coal rock specimen to be in experiment desirable value；
S3：The first control valve 601 is opened, high concentration gas gas tank is full of methane gas, closes the first control valve 601,
After startup power supply, collection airbag switch is opened, air in device is completely drawn out by vavuum pump, after device is in vacuum environment, closed
Closed set airbag is switched；
S4：Start after computer switch, open the second control valve 602, close the 3rd control valve 603, gas mass flow
The methane gas that meter detection is flowed out from high concentration gas gas tank, it is special that the methane gas of outflow is extracted into coal petrography by vavuum pump 701
In tank, after gas mass flow gauge reaches predetermined value, the second control valve 602 is closed, resistivity measuring instrument can be surveyed in real time
Resistivity value of the coal rock specimen under different coal petrography gas adsorption contents is measured, gas mass flow gauge and resistivity measuring instrument pass through
Signal transmssion line will measure experimental data and pass to computer；
S5：After precision digital pressure gauge is in stationary value, coal petrography is adsorbed completely, at the same time closes the second control valve
602, the 3rd control valve 603 is opened, coal petrography proceeds by desorption, and the methane gas that vavuum pump 702 desorbs coal petrography is pumped into
Graduated cylinder, laser detector passes through signal by detecting that the height change of graduated cylinder liquid level kickboard determines the gas of coal petrography desorption of mash gas
Transmission line sends experimental data to control circuit box, at the same time resistivity measuring instrument measurement coal petrography gas difference desorption content
Under coal petrography resistivity value, control circuit box and resistivity measuring instrument experimental data will be measured by signal transmssion line and pass to calculating
Machine；
S6：The data that computer is recorded and stores gas mass flow gauge automatically, control circuit box and resistivity measuring instrument are transmitted,
Detected resistance value is checked comprehensively, rejects false data（The i.e. obvious data for not reflecting true geological information）, obtain containing watt
The resistivity value of this coal body, then by the program of independent compilation fit the change curve of coal petrography adsorption-desorption and coal petrography resistivity with
And equation；
S7：After experiment terminates, the 4th control valve 604 is opened, the methane gas for collecting airbag recovery is extracted into highly concentrated by vavuum pump 704
Methane gas tank is spent, the 4th control valve 604 is closed after terminating, the recycling of methane gas is realized.
Further, the step S1 coal rock specimens specifically include following steps in simulation pit mining condition encapsulation process：
S11：The coal petrography sample drilled through is processed into the mm of mm of φ 50 × 100 coal rock specimen, and two ends are polished, is put into
Removed water in drying box；
S12：In coal rock specimen two ends borehole, measuring electrode copper sheet is put into hole, extracted by signal transmssion line, coal dust is used
Compacting is paved, then fixation is glued with sealed reagent importing coal dust；
S13：Coal rock specimen after processing is fixed on absorption narrow-necked earthen jar, upper end placement precision digital pressure gauge, pressure sensor and temperature
Sensor is spent, absorption narrow-necked earthen jar upper and lower end disposes pressure sensor；
S14：Coal rock specimen and absorption narrow-necked earthen jar are integrally put into coal petrography jar special, upper end placement precision digital pressure gauge and outlet
Pipe；
S15；Precision digital pressure tabular value is transferred to experiment desirable value, and is connected with gas pressure systems and gas flowmeter.
Further, the absorption narrow-necked earthen jar is coal rock specimen special fixing device, and disposable type coal petrography can be fixed by flexible
Test specimen simultaneously disposes precision digital pressure gauge, pressure sensor, temperature sensor and gas pressure systems.
Further, the coal petrography upper and lower side placement measuring electrode copper sheet, compacting is paved with coal dust, then fixed with sealed reagent
Good coal dust and coal petrography, are sealed between insulating lid and coal petrography jar special with sealed reagent.
Desorption of mash gas detecting system described further measures coal petrography desorption of mash gas content using oil extraction method.
Brief description of the drawings
Fig. 1 is coal petrography adsorption-desorption integral resistance rate measuring method structure chart of the present invention；
Fig. 2 is constant temperature water bath apparatus structure chart of the present invention；
Fig. 3 is coal petrography adsorption-desorption integral resistance rate measuring method flow chart of the present invention.
In figure：1 high concentration gas gas tank, 2 precision digital pressure gauges, 3 gas mass flow gauge, 4 blast pipes, 5 signals
Transmission line, 6 control valves, 7 vavuum pumps, 8 DC resistivity measurements instrument, 9 constant temperature water bath apparatus, 10 coal petrography jar specials, 11 coal petrographys
Test specimen, 12 pressure sensors, 13 temperature sensors, 14 measuring electrode copper sheets, 15 absorption narrow-necked earthen jars, 16 gas pressure systems, 17 precisions
Digital pressure gauge, 18 waters bath with thermostatic control, 19 insulating lids, 20 electromagnetism two-bit triplet valves, 21 graduated cylinders, 22 oil grooves, 23 laser detectors,
24 control circuit box, 25 control boards, 26 relays, 27 collection airbags, 28 alarm display lamps, 29 emergency stop switchs, 30 electricity
Source switch, 31 computers, 32 kickboards.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example is applied, the scope of protection of the invention is belonged to.
Fig. 1 is coal petrography adsorption-desorption integral resistance rate measuring method of the present invention and device experimental system figure, and Fig. 2 is this
Invention constant temperature water bath apparatus structural representation, the purpose of coal petrography adsorption-desorption integral resistance rate measurement of the present invention is can be real-time
The resistivity value for recording, storing under different coal petrography gas adsorption desorption contents, and study coal petrography methane gas adsorption-desorption content
The mechanism influenceed on coal petrography change in resistance.
Fig. 3 is the flow chart of coal petrography adsorption-desorption integral resistance rate measuring method of the present invention, is comprised the following steps：
S1：By coal rock specimen in simulation pit mining condition encapsulation process；Specifically include following steps：
S11：The coal petrography sample drilled through is processed into the mm of mm of φ 50 × 100 coal rock specimen, and two ends are polished, is put into
Removed water in drying box；
S12：In coal rock specimen two ends borehole, measuring electrode copper sheet is put into hole, extracted by signal transmssion line, coal dust is used
Compacting is paved, then fixation is glued with sealed reagent importing coal dust；
S13：Coal rock specimen after processing is fixed on absorption narrow-necked earthen jar, upper end placement precision digital pressure gauge, pressure sensor and temperature
Sensor is spent, absorption narrow-necked earthen jar upper and lower end disposes pressure sensor；
S14：Coal rock specimen and absorption narrow-necked earthen jar are integrally put into coal petrography jar special, upper end placement precision digital pressure gauge and outlet
Pipe；
S15；Precision digital pressure tabular value is transferred to experiment desirable value, and is connected with gas pressure systems and gas flowmeter.
S2：Coal petrography jar special is put into constant temperature water bath apparatus, sets the temperature of coal rock specimen to be in experiment desirable value；
S3：The first control valve 601 is opened, high concentration gas gas tank is full of methane gas, closes the first control valve 601,
After startup power supply, collection airbag switch is opened, air in device is completely drawn out by vavuum pump, after device is in vacuum environment, closed
Closed set airbag is switched；
S4：Start after computer switch, open the second control valve 602, close the 3rd control valve 603, gas mass flow
The methane gas that meter detection is flowed out from high concentration gas gas tank, it is special that the methane gas of outflow is extracted into coal petrography by vavuum pump 701
In tank, after gas mass flow gauge reaches predetermined value, the second control valve 602 is closed, resistivity measuring instrument can be surveyed in real time
Resistivity value of the coal rock specimen under different coal petrography gas adsorption contents is measured, gas mass flow gauge and resistivity measuring instrument pass through
Signal transmssion line will measure experimental data and pass to computer；
S5：After precision digital pressure gauge is in stationary value, coal petrography is adsorbed completely, at the same time closes the second control valve
602, the 3rd control valve 603 is opened, coal petrography proceeds by desorption, and the methane gas that vavuum pump 702 desorbs coal petrography is pumped into
Graduated cylinder, laser detector passes through signal by detecting that the height change of graduated cylinder liquid level kickboard determines the gas of coal petrography desorption of mash gas
Transmission line sends data measured to control circuit box, at the same time resistivity measuring instrument measurement coal petrography gas difference desorption content
Under coal petrography resistivity value, control circuit box and resistivity measuring instrument experimental data will be measured by signal transmssion line and pass to calculating
Machine；
S6：The data that computer is recorded and stores gas mass flow gauge automatically, control circuit box and resistivity measuring instrument are transmitted,
Detected resistance value is checked comprehensively, rejects false data（The i.e. obvious data for not reflecting true geological information）, obtain containing watt
The resistivity value of this coal body, then by the program of independent compilation fit the change curve of coal petrography adsorption-desorption and coal petrography resistivity with
And equation；
S7：After experiment terminates, the 4th control valve 604 is opened, the methane gas for collecting airbag recovery is extracted into highly concentrated by vavuum pump 704
Methane gas tank is spent, the 4th control valve 604 is closed after terminating, the recycling of methane gas is realized.
Obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiments.In the present invention
An accompanying drawing or a kind of embodiment described in element and feature can be with one or more of the other accompanying drawing or embodiment
In the element that shows and feature be combined.It should be noted that for purposes of clarity, being eliminated and nothing of the present invention in accompanying drawing and explanation
Close, part known to persons of ordinary skill in the art and the expression and description of processing.Based on the embodiment in the present invention, ability
The every other embodiment that domain those of ordinary skill is obtained on the premise of creative work is not paid, belongs to the present invention
The scope of protection.
Claims (5)
1. coal petrography adsorption-desorption integral resistance rate measuring method, it is characterised in that comprise the following steps：
S1：Coal rock specimen is subjected to encapsulation process in simulation pit mining condition；
S2：Coal petrography jar special is put into constant temperature water bath apparatus, sets the temperature of coal rock specimen to be in experiment desirable value；
S3：The first control valve 601 is opened, high concentration gas gas tank is full of methane gas, closes the first control valve 601,
After startup power supply, collection airbag switch is opened, air in device is completely drawn out by vavuum pump, after device is in vacuum environment, closed
Closed set airbag is switched；
S4：Start after computer switch, open the second control valve 602, close the 3rd control valve 603, gas mass flow
The methane gas that meter detection is flowed out from high concentration gas gas tank, it is special that the methane gas of outflow is extracted into coal petrography by vavuum pump 701
In tank, after gas mass flow gauge reaches predetermined value, the second control valve 602 is closed, resistivity measuring instrument can be surveyed in real time
Resistivity value of the coal rock specimen under different coal petrography gas adsorption contents is measured, gas mass flow gauge and resistivity measuring instrument pass through
Signal transmssion line will measure experimental data and pass to computer；
S5：After precision digital pressure gauge is in stationary value, coal petrography is adsorbed completely, at the same time closes the second control valve
602, the 3rd control valve 603 is opened, coal petrography proceeds by desorption, and the methane gas that vavuum pump 702 desorbs coal petrography is pumped into
Graduated cylinder, laser detector passes through signal by detecting that the height change of graduated cylinder liquid level kickboard determines the gas of coal petrography desorption of mash gas
Transmission line sends experimental data to control circuit box, at the same time resistivity measuring instrument measurement coal petrography gas difference desorption content
Under coal petrography resistivity value, control circuit box and resistivity measuring instrument experimental data will be measured by signal transmssion line and pass to calculating
Machine；
S6：The data that computer is recorded and stores gas mass flow gauge automatically, control circuit box and resistivity measuring instrument are transmitted,
Detected resistance value is checked comprehensively, rejects false data（The i.e. obvious data for not reflecting true geological information）, obtain containing watt
The resistivity value of this coal body, then by the program of independent compilation fit the change curve of coal petrography adsorption-desorption and coal petrography resistivity with
And equation；
S7：After experiment terminates, the 4th control valve 604 is opened, the methane gas for collecting airbag recovery is extracted into highly concentrated by vavuum pump 704
Methane gas tank is spent, the 4th control valve 604 is closed after terminating, the recycling of methane gas is realized.
2. coal petrography adsorption-desorption integral resistance rate measuring method according to claim 1, it is characterised in that：The S1 will
Coal rock specimen specifically includes following steps in simulation pit mining condition encapsulation process：
S11：The coal petrography sample drilled through is processed into the mm of mm of φ 50 × 100 coal rock specimen, and two ends are polished, is put into
Removed water in drying box；
S12：In coal rock specimen two ends borehole, measuring electrode copper sheet is put into hole, extracted by signal transmssion line, coal dust is used
Compacting is paved, then fixation is glued with sealed reagent importing coal dust；
S13：Coal rock specimen after processing is fixed on absorption narrow-necked earthen jar, upper end placement precision digital pressure gauge, pressure sensor and temperature
Sensor is spent, absorption narrow-necked earthen jar upper and lower end disposes pressure sensor；
S14：Coal rock specimen and absorption narrow-necked earthen jar are integrally put into coal petrography jar special, upper end placement precision digital pressure gauge and outlet
Pipe；
S15；Precision digital pressure tabular value is transferred to experiment desirable value, and is connected with gas pressure systems and gas flowmeter.
3. coal petrography adsorption-desorption integral resistance rate measuring method according to claim 1, it is characterised in that：The gas
Desorb detecting system and coal petrography desorption of mash gas content is measured using oil extraction method.
4. coal rock specimen is carried out encapsulation process by S1 in simulation pit mining condition according to claim 2, it is characterised in that：
The coal petrography upper and lower side disposes measuring electrode copper sheet, and compacting is paved with coal dust, then fixes coal dust and coal petrography with sealed reagent, absolutely
Sealed between edge lid and coal petrography jar special with sealed reagent.
5. coal rock specimen is carried out encapsulation process by S1 in simulation pit mining condition according to claim 2, it is characterised in that：
The absorption narrow-necked earthen jar is coal rock specimen special fixing device, can fix disposable type coal rock specimen by stretching and dispose accurate number
Word pressure gauge, pressure sensor, temperature sensor and gas pressure systems.
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Cited By (9)
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| CN108414836A (en) * | 2018-04-27 | 2018-08-17 | 河南理工大学 | Nitrogen is gas displacing coal-bed to use complex resistance measuring system and method |
| CN108535135A (en) * | 2018-05-24 | 2018-09-14 | 中国地质大学（北京） | Experimental system and method for measuring gas absorption-diffusion-displacement |
| CN108625900A (en) * | 2018-07-11 | 2018-10-09 | 贵州安和矿业科技工程股份有限公司 | A kind of fire damp solves analyzer and application method automatically |
| CN109002428A (en) * | 2018-05-24 | 2018-12-14 | 长江水利委员会水文局 | A kind of progressive reorganization method of hydrological data segmentation |
| CN109085289A (en) * | 2018-07-05 | 2018-12-25 | 王舒怡 | A kind of fixed wind energy gas detector of mine |
| CN110530771A (en) * | 2019-09-02 | 2019-12-03 | 重庆大学 | Pressure chamber is used in the test of coal petrography sample gas flow |
| CN112378812A (en) * | 2020-11-06 | 2021-02-19 | 西南石油大学 | Experimental device and method for determining desorption rate of adsorption type shale gas |
| CN112782477A (en) * | 2019-11-11 | 2021-05-11 | 中国石油化工股份有限公司 | Method and system for measuring electrical response characteristics of rock core in different wetting states |
| CN113219002A (en) * | 2021-06-07 | 2021-08-06 | 华北科技学院 | Experimental device for research on resistivity of gas-containing coal body and using method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108535135B (en) * | 2018-05-24 | 2023-08-15 | 中国地质大学（北京） | Experimental system and method for measuring gas adsorption-diffusion-displacement |
| CN108535135A (en) * | 2018-05-24 | 2018-09-14 | 中国地质大学（北京） | Experimental system and method for measuring gas absorption-diffusion-displacement |
| CN109002428A (en) * | 2018-05-24 | 2018-12-14 | 长江水利委员会水文局 | A kind of progressive reorganization method of hydrological data segmentation |
| CN109085289A (en) * | 2018-07-05 | 2018-12-25 | 王舒怡 | A kind of fixed wind energy gas detector of mine |
| CN108625900A (en) * | 2018-07-11 | 2018-10-09 | 贵州安和矿业科技工程股份有限公司 | A kind of fire damp solves analyzer and application method automatically |
| CN110530771A (en) * | 2019-09-02 | 2019-12-03 | 重庆大学 | Pressure chamber is used in the test of coal petrography sample gas flow |
| CN112782477A (en) * | 2019-11-11 | 2021-05-11 | 中国石油化工股份有限公司 | Method and system for measuring electrical response characteristics of rock core in different wetting states |
| CN112782477B (en) * | 2019-11-11 | 2024-05-14 | 中国石油化工股份有限公司 | Method and system for measuring electrical response characteristics of rock core in different wetting states |
| CN112378812A (en) * | 2020-11-06 | 2021-02-19 | 西南石油大学 | Experimental device and method for determining desorption rate of adsorption type shale gas |
| CN112378812B (en) * | 2020-11-06 | 2021-12-14 | 西南石油大学 | Experimental device and method for determining desorption rate of adsorption type shale gas |
| CN113219002A (en) * | 2021-06-07 | 2021-08-06 | 华北科技学院 | Experimental device for research on resistivity of gas-containing coal body and using method |
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Application publication date: 20170829 |