CN107153062B - A kind of detection device and detection method of coal and gas prominent - Google Patents
A kind of detection device and detection method of coal and gas prominent Download PDFInfo
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- CN107153062B CN107153062B CN201710334719.2A CN201710334719A CN107153062B CN 107153062 B CN107153062 B CN 107153062B CN 201710334719 A CN201710334719 A CN 201710334719A CN 107153062 B CN107153062 B CN 107153062B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N2021/8405—Application to two-phase or mixed materials, e.g. gas dissolved in liquids
Abstract
The present invention discloses the detection device and detection method of a kind of coal and gas prominent, and detection device includes high-speed camera, information collecting device and sample carrier；Sample carrier is placed in water bath with thermostatic control, sample carrier is used to load the coal sample with gas adsorption or the rock sample sample without gas adsorption, sample carrier is separately connected temperature control equipment, pressure-control valve and high-precision pressure gauge, and the temperature control equipment is made of temperature controller and control switch；One end of sample carrier is fixedly connected with conical tube, has scale on conical tube, the opening right opposite of conical tube is arranged in high-speed camera, and high-speed camera is connect with information collecting device；The instantaneous dynamometer of foil gauge is equipped with inside conical bobbin.Detection method uses high speed imaging system, transport conditions, affecting laws and influencing mechanism in comprehensive accurate recording, the processed coal and gas prominent development process of analysis of fluorescence dyestuff, transport characteristics information when more accurately, reliable extracting prominent weak spot and protruding.
Description
Technical field
The present invention relates to a kind of detection device of coal and gas prominent and detection methods, and in particular to one kind is taken the photograph based on high speed
The coal and gas prominent device and method of camera acquisition information.Belong to the outburst hazard field of forecasting coal and gas.
Background technique
Currently, coal and gas prominent is to cause one of principal element of mine disaster, coal and gas prominent mechanism is China
The problem in science that highly gassy mine safety in production is urgently broken through, is the grand strategy demand and break through direction of national energy security.
Therefore Study on Coal and gas outburst mechanism (migration of coal and gas) can fundamentally understand its reason and from angle more profound
Degree solves the problems, such as.
Gas is the mixed gas of the preservation that is formed by incoalation in coal seam based on methane, and coal and gas prominent is
Refer to coal production during from coal seam, rock stratum and goaf release various pernicious gases be enriched on working face and gush out to
Cause the Coal Mine Disasters of gas explosion.
The mechanism and form that coal and gas prominent occurs be it is complicated, with the increase of coal mining depth, and exploitation
Condition increasingly complicates, and the generation of coal and gas prominent also more difficult prediction, existing is mostly the detection to coal and gas prominent
The research of alarm system, but its prediction result can not represent the outburst hazard of coal in entire estimation range completely, contain coal
Gas body be in process of production it is unstable, in prediction, the result that obtains is static state, can not represent coal body completely
The outburst hazard in entire period before stablizing.At present domestic and foreign scholars to the mechanism study of coal and gas prominent obtained it is some at
Fruit, but most achievements are field statistics data and the hypothesis that laboratory research proposes.
Summary of the invention
The present invention is intended to provide a kind of structure is simple, can record, the migration feelings in analysis coal and gas prominent development process
The detection device and detection method of the coal and gas prominent of condition, affecting laws and influencing mechanism, using high speed imaging to coal with watt
This prominent development process carries out qualitative, quantitative description.
The present invention provides a kind of detection device of coal and gas prominent, including high-speed camera, information collecting device with
And sample carrier；
The sample carrier is placed in water bath with thermostatic control, and the sample carrier can be used for loading the coal sample or not with gas adsorption
Rock sample sample with gas adsorption, sample carrier are separately connected temperature control equipment, pressure-control valve and high-precision pressure gauge,
The temperature control equipment is made of temperature controller and control switch；Pipe-line control valve door is also equipped on sample carrier；
One end of sample carrier is fixedly connected with conical tube, and scale is had on conical tube, and high-speed camera is arranged in circular cone
The opening right opposite of shape cylinder, high-speed camera are connect with information collecting device, use computer by high-speed camera imaging
Data processing can calculate gas each moment volume outstanding and state outstanding；The graduated conical bobbin of band
Inside is equipped with the instantaneous dynamometer of foil gauge；The instantaneous dynamometer of foil gauge can measure the force value for strains of impact piece moment of producing coal, in conjunction with
The collision angle analytical calculation of high-speed camera acquisition sprays the force value of moment.
Described to connect with graduated conical tube with sample carrier, one end of bobbin is thinner, and other end diameter compared with
Big, the process of the coal and gas prominent encountered and release in true coal petrography recovery process is fully reduced, is reduced
During the experiment to the other influences factor of the data validity of experiment acquisition, validity.
In above-mentioned apparatus, the rock sample in all product sample carriers of muck has and the coal sample sample phase in sample carrier of coalingging
Density together, particle size, but without adsorptivity, it is compared with rock sample sample and carries out coal and gas prominent simulated experiment, exclude it
The interference of his factor keeps the conclusion of experiment more convincing.
In above-mentioned apparatus, the high-precision pressure gauge, use accuracy for decimal point after three digital pressure gauges, to the greatest extent
It is likely to reduced the influence of error, so as to the pressure in accurate recording sample carrier.
In above-mentioned apparatus, the pressure-control valve can carry out pressure setting to valve, and reaching the predetermined of pressure sets
When setting value, control valve is automatically turned on, and keeps the gas in coal sample prominent from its weak spot.
In above-mentioned apparatus, the conical tube is made of transparent organic material, convenient for high-speed camera to coal with watt
This protrudes the acquisition of the image information of transient state.
In above-mentioned apparatus, the instantaneous dynamometer of the foil gauge is uniformly arranged in conical tube, and with conical tube
Axis direction is vertically arranged.
The present invention provides a kind of detection methods of coal and gas prominent, are filled using the detection of above-mentioned coal and gas prominent
It sets, it is characterised in that the following steps are included:
Step 1, the selection of coal sample and broken: the coal sample in collection site coal seam tightly encapsulates, and is crushed in laboratory, uses
Standard screen sieves broken coal sample, makes the partial size of coal sample between 0.2-0.25mm；
Step 2 dyes broken coal by fluorescent dye, obtains fluorescence coal, keeps high-speed camera function more clear
Clear acquisition image information, the information of acquisition is more accurate, and identification is higher；
Coal sample is fitted into empty sample carrier by step 3, is measured through coal sample dead space measurement device, is obtained sample of coalingging
Tank dead space VCoal is dead；
Step 4 installs instantaneous dynamometer in conical tube, and inspection system ensures to connect reliable, by water bath with thermostatic control tune
Whole to 30 DEG C of predetermined value；
The installation and debugging of step 5, high-speed camera: according to the experiment purpose and experiment scene drop target object of setting,
It is exposed simultaneously according to video camera of the light intensity to Image Acquisition and the adjustment of gain, to reach the target of experiment；
Step 6, the first pipe-line control valve door of opening and gas pressure reducer are inflated, and after inflation, will pass through first
Pipe-line control valve door is filled with CH to sample carrier is coaling with the rate of 1mL/min4High-pressure air source, at the coal dust in the sample carrier that makes to coaling
In adsorption equilibrium state, when gas pressure reaches certain value in sample carrier, automatic pressure control valve door is opened moment, outstanding
Coal is with methane gas by being connected to releasing with graduated circular cone bobbin for sample carrier one end；
It is step 7, with multi-angle that collision angle α, the gas of fluorescence coal is each using high-speed camera visual imaging technology
Protrude the acquisition of gas volume Q information, the transport conditions in comprehensive accurate recording coal and gas prominent development process；
Step 8, acquisition are coaling the gas flow Q in sample carrier1With the data transmission of time t to computerized information acquisition device
In, then make Q-t figure；Acquire the force value F on the instantaneous dynamometer at each moment；
Step 9. arranges experimental record, according to equation of state of real gas PV=nRTZ, analytical calculation data；According to fluorescence
The collision angle α of coal and the path analysis after collision calculate the force value F of prominent moment0 And angle [alpha] when prominent0 =α；
Step 10. by the coal sample in sample carrier replace with coal sample density having the same, particle size, but without absorption
The rock sample sample of property, makes the dead space of the sample carrier of all product of muck meet VRock is dead=VCoal is dead, repeat the above steps.
In above-mentioned detection method, the fluorescence coal, by fluorescent dye to coal of the partial size between 0.2-0.25mm into
Row dyeing, can make coal show color after dyeing, collect convenient for high-speed camera machine information, and do not change other properties of coal.
In above-mentioned detection method, the coal sample dead space measurement device includes U-tube, coaling sample carrier and methane high pressure gas
Source, the outlet of methane high-pressure air source are equipped with the first pipe-line control valve door, and the pipeline that sample carrier of coalingging is controlled to a vacuum pump is equipped with the
Two pipe-line control valve doors, sample carrier of coalingging is connected to methane high-pressure air source and connecting pipe is equipped with pressure reducing valve；U-tube is by bottom
First straight tube of connection and the second straight tube composition, adjust U-tube by adjusting the relative altitude of the first straight tube and the second straight tube
The height of interior liquid level.The communicating pipe of first straight tube and the second straight tube bottom is equipped with the 4th pipe-line control valve door, sample carrier of coalingging
It is connect with the second straight tube of U-tube and its opening and closing is controlled by third pipe-line control valve door；
Coal sample dead space measuring method are as follows:
The helium (initial position of U-tube liquid level is 200) of 200mL, graduated cylinder are collected by drainage first in U-tube
In red liquid is housed, the helium above liquid to collect.
It opens vacuum pump to be de-gassed sample carrier of coalingging, negative pressure state is in sample carrier of coalingging after degassing, close
Close the second pipe-line control valve door；
Third, the 4th pipe-line control valve door for opening U-tube are negative pressure in sample carrier at this time, and the helium in graduated cylinder is negative
It can be entered in sample carrier under pressure effect, it is believed that helium occupies the dead space of sample carrier, adjusts the first straight tube of U-tube and second
The relative position of straight tube, so that the holding of U-tube both ends liquid level moment maintains an equal level during into helium, if meniscus ends height is
VEventually, then entering helium volume in sample carrier is exactly 200-VEventually(mL)；
When the helium in graduated cylinder does not enter back into sample carrier, the height for adjusting U-tube makes the first straight tube of U-tube and second directly
Pipe or so liquid level is consistent, closes U-tube third, the 4th pipe-line control valve door, reads high where meniscus ends in U-tube
Degree can obtain the volume of the helium entered in sample carrier, and as coaling sample carrier dead space VCoal is dead。
High speed imaging system of the invention, be it is a kind of using machine vision imaging technology by the processed coal of fluorescent dye with
The transient state information of Gas Outburst acquires, and intuitively reflects with image, and comprehensive accurate recording, analysis of fluorescence dyestuff are processed
Coal and gas prominent development process in transport conditions, affecting laws and influencing mechanism.This method based on high speed imaging,
Imaging process when completing prominent, transport characteristics information when more accurately, reliable extracting prominent weak spot and protruding, for it
Image can be analyzed, and can model to prominent process.
Beneficial effects of the present invention:
The present invention using high-speed camera visual imaging technology by the information collection of Gas Outburst position, it is intuitive with image
Reflect, comprehensive accurate recording, analysis coal and gas prominent development process in transport conditions, affecting laws and influence machine
System.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is sample carrier dead space of the invention (remaining volume after the volume of sample tank volume removing coal sample) measurement
With CH4High-pressure air source schematic diagram.
Fig. 3 is the variation schematic diagram of the gas flow Q t at any time in sample carrier of the invention.
In figure: 1 is high-speed camera, and 2 be information collecting device, and 3 be sample carrier, and 4 be water bath with thermostatic control, and 5 control for temperature
Device, 6 be control switch, and 7 be pressure-control valve, and 8 be high-precision pressure gauge, and 9 be conical tube, and 10 be the instantaneous dynamometry of foil gauge
Device, 11 be the first pipe-line control valve door, and 12 be high-pressure air source, and 13 be the second pipe-line control valve door, and 14 be vacuum pump, and 15 be decompression
Valve, 16 be the first straight tube, and 17 be the second straight tube, and 18 be the 4th pipe-line control valve door, and 19 be third pipe-line control valve door, and 20 be glimmering
Photo etching sample；A is water, and B is helium.
Specific embodiment
The present invention is further illustrated below by embodiment, but is not limited to following embodiment.
Embodiment:
A kind of detection device of coal and gas prominent, including high-speed camera 1, information collecting device 2 and sample carrier 3；
The sample carrier 3 is placed in water bath with thermostatic control 4, and the sample carrier 3 can be used for loading the coal sample with gas adsorption
Or the rock sample sample without gas adsorption, sample carrier 3 are separately connected temperature control equipment, pressure-control valve 7 and high-precision
Pressure gauge 8, the temperature control equipment are made of temperature controller 5 and control switch 6；Pipeline control is also equipped on sample carrier 3
Valve；
One end of sample carrier 3 is fixedly connected with conical tube 9, and scale is had on conical tube 9, and the setting of high-speed camera 1 exists
The opening right opposite of conical tube 9, high-speed camera 1 are connect with information collecting device 2, are imaged and are transported by high-speed camera 1
With computer digital animation, gas each moment volume outstanding and state outstanding can be calculated；The graduated circle of band
The instantaneous dynamometer 10 of foil gauge is equipped with inside cone；The instantaneous dynamometer 10 of foil gauge can measure strains of impact piece moment of producing coal
Force value, in conjunction with high-speed camera 1 acquire collision angle analytical calculation spray moment force value.
It is described with graduated conical tube 9, connect with sample carrier 3, one end of bobbin is thinner, and other end diameter
It is biggish, the process of the coal and gas prominent encountered and release in true coal petrography recovery process is fully reduced, is reduced
During the experiment to the other influences factor of the data validity of experiment acquisition, validity.
In above-mentioned apparatus, the rock sample in all product sample carriers of muck has and the coal sample sample phase in sample carrier of coalingging
Density together, particle size, but without adsorptivity, it is compared with rock sample sample and carries out coal and gas prominent simulated experiment, exclude it
The interference of his factor keeps the conclusion of experiment more convincing.
In above-mentioned apparatus, the high-precision pressure gauge 8, use accuracy for decimal point after three digital pressure gauges,
The influence of error is reduced, as far as possible so as to the pressure in accurate recording sample carrier.
In above-mentioned apparatus, the pressure-control valve 7 can carry out pressure setting to valve, reach the predetermined of pressure
When setting value, control valve is automatically turned on, and keeps the gas in coal sample prominent from its weak spot.
In above-mentioned apparatus, the conical tube 9 is made of transparent organic material, convenient for high-speed camera 1 to coal with
The acquisition of the image information of Gas Outburst transient state.
In above-mentioned apparatus, the instantaneous dynamometer 10 of the foil gauge is uniformly arranged in conical tube 9, and and conical tube
9 axis direction is vertically arranged.
The present invention provides a kind of detection methods of coal and gas prominent, are filled using the detection of above-mentioned coal and gas prominent
It sets, it is characterised in that the following steps are included:
Step 1, the selection of coal sample and broken: the coal sample in collection site coal seam tightly encapsulates, and is crushed in laboratory, uses
Standard screen sieves broken coal sample, makes the partial size of coal sample between 0.2-0.25mm；
Step 2 dyes broken coal by fluorescent dye, obtains fluorescence coal, keeps high-speed camera function more clear
Clear acquisition image information, the information of acquisition is more accurate, and identification is higher；
Coal sample is fitted into empty sample carrier by step 3, is measured through coal sample dead space measurement device, is obtained sample of coalingging
Tank dead space VCoal is dead；
Step 4 installs instantaneous dynamometer in conical tube, and inspection system ensures to connect reliable, by water bath with thermostatic control tune
Whole to 30 DEG C of predetermined value；
The installation and debugging of step 5, high-speed camera: according to the experiment purpose and experiment scene drop target object of setting,
It is exposed simultaneously according to video camera of the light intensity to Image Acquisition and the adjustment of gain, to reach the target of experiment；
Step 6, the first pipe-line control valve door of opening and gas pressure reducer are inflated, and after inflation, will pass through first
Pipe-line control valve door is filled with CH to sample carrier is coaling with the rate of 1mL/min4High-pressure air source, at the coal dust in the sample carrier that makes to coaling
In adsorption equilibrium state, when gas pressure reaches certain value in sample carrier, automatic pressure control valve door is opened moment, outstanding
Coal is with methane gas by being connected to releasing with graduated circular cone bobbin for sample carrier one end；
It is step 7, with multi-angle that collision angle α, the gas of fluorescence coal is each using high-speed camera visual imaging technology
Protrude the acquisition of gas volume Q information, the transport conditions in comprehensive accurate recording coal and gas prominent development process；
Step 8, acquisition are coaling the gas flow Q in sample carrier1With the data transmission of time t to computerized information acquisition device
In, then make Q-t figure；Acquire the force value F on the instantaneous dynamometer at each moment；
Step 9. arranges experimental record, according to equation of state of real gas PV=nRTZ, analytical calculation data；According to fluorescence
The collision angle α of coal and the path analysis after collision calculate the force value F of prominent moment0 And angle [alpha] when prominent0 =α；
Step 10. by the coal sample in sample carrier replace with coal sample density having the same, particle size, but without absorption
The rock sample sample of property, makes the dead space of the sample carrier of all product of muck meet VRock is dead=VCoal is dead, repeat the above steps.
In above-mentioned detection method, the fluorescence coal, by fluorescent dye to coal of the partial size between 0.2-0.25mm into
Row dyeing, can make coal show color after dyeing, collect convenient for high-speed camera machine information, and do not change other properties of coal.
In above-mentioned detection method, the coal sample dead space measurement device includes U-tube, coaling sample carrier and methane high pressure gas
Source 12, the outlet of methane high-pressure air source 12 are equipped with the first pipe-line control valve door 11, the pipeline that sample carrier of coalingging is connect with vacuum pump 14
It is equipped with the second pipe-line control valve door 13, sample carrier of coalingging is connected to methane high-pressure air source and connecting pipe is equipped with pressure reducing valve
15；The first straight tube 16 and the second straight tube 17 that U-tube is connected to by bottom form, by adjusting the first straight tube 16 and the second straight tube 17
Relative altitude adjust the height of liquid level in U-tube.The communicating pipe of 17 bottom of first straight tube 16 and the second straight tube is equipped with the
Four pipe-line control valve doors 18, the second straight tube connection of coaling sample carrier and U-tube and are controlled by third pipe-line control valve door 19
It is opened and closed；
Coal sample dead space measuring method are as follows:
The helium (initial position of U-tube liquid level is 200) of 200mL, graduated cylinder are collected by drainage first in U-tube
In red liquid is housed, the helium above liquid to collect.
It opens vacuum pump to be de-gassed sample carrier of coalingging, negative pressure state is in sample carrier of coalingging after degassing, close
Close the second pipe-line control valve door；
Third, the 4th pipe-line control valve door for opening U-tube are negative pressure in sample carrier at this time, and the helium in graduated cylinder is negative
It can be entered in sample carrier under pressure effect, it is believed that helium occupies the dead space of sample carrier, adjusts the first straight tube of U-tube and second
The relative position of straight tube, so that the holding of U-tube both ends liquid level moment maintains an equal level during into helium, if meniscus ends height is
VEventually, then entering helium volume in sample carrier is exactly 200-VEventually(mL)；
When the helium in graduated cylinder does not enter back into sample carrier, the height for adjusting U-tube makes the first straight tube of U-tube and second directly
Pipe or so liquid level is consistent, closes U-tube third, the 4th pipe-line control valve door, reads high where meniscus ends in U-tube
Degree can obtain the volume of the helium entered in sample carrier, and as coaling sample carrier dead space VCoal is dead。
Claims (9)
1. a kind of detection device of coal and gas prominent, it is characterised in that: including high-speed camera, information collecting device and examination
Sample tank；
The sample carrier is placed in water bath with thermostatic control, the sample carrier be used for loads with gas adsorption coal sample or without watt
The rock sample sample of this adsorptivity, sample carrier are separately connected temperature control equipment, pressure-control valve and high-precision pressure gauge, the temperature
Degree control device is made of temperature controller and control switch；Pipe-line control valve door is also equipped on sample carrier；
One end of sample carrier is fixedly connected with conical tube, and scale is had on conical tube, and high-speed camera is arranged in conical tube
Opening right opposite, high-speed camera connect with information collecting device；It is equipped with inside the graduated conical bobbin of band
The instantaneous dynamometer of foil gauge.
2. the detection device of coal and gas prominent according to claim 1, it is characterised in that: the rock sample sample have with
The identical density of coal sample sample, particle size, but without adsorptivity, it is compared with rock sample sample and carries out coal and gas prominent simulation in fact
It tests.
3. the detection device of coal and gas prominent according to claim 1, it is characterised in that: the high-precision pressure
Table, use accuracy for decimal point after three digital pressure gauges.
4. the detection device of coal and gas prominent according to claim 1, it is characterised in that: the pressure-control valve,
Pressure setting can be carried out to valve, when reaching the predetermined set value of pressure, control valve is automatically turned on, and makes watt in coal sample
This is prominent from its weak spot.
5. the detection device of coal and gas prominent according to claim 1, it is characterised in that: the conical tube is by saturating
Bright organic material is made, the acquisition convenient for high-speed camera to the image information of coal and gas prominent transient state.
6. the detection device of coal and gas prominent according to claim 1, it is characterised in that: the foil gauge is instantaneously surveyed
Power device is uniformly arranged in conical tube, and is vertically arranged with the axis direction of conical tube.
7. a kind of detection method of coal and gas prominent, using the inspection of the described in any item coal and gas prominents of claim 1 ~ 6
Survey device, it is characterised in that the following steps are included:
Step 1, the selection of coal sample and broken: the coal sample in collection site coal seam tightly encapsulates, and is crushed in laboratory, uses standard
Sieve sieves broken coal sample, makes the partial size of coal sample between 0.2-0.25mm；
Step 2 dyes broken coal by fluorescent dye, obtains fluorescence coal, is more clear high-speed camera function
Image information is acquired, the information of acquisition is more accurate, identification is higher；
Coal sample is fitted into empty sample carrier by step 3, is measured through coal sample dead space measurement device, and the sample carrier that obtains coalingging is dead
SPACE VCoal is dead；
Step 4 installs instantaneous dynamometer in conical tube, and inspection system ensures to connect reliable, water bath with thermostatic control is adjusted to
30 DEG C of predetermined value；
The installation and debugging of step 5, high-speed camera: according to the experiment purpose and experiment scene drop target object of setting, simultaneously
It is exposed according to video camera of the light intensity to Image Acquisition and the adjustment of gain, to reach the target of experiment；
Step 6 is opened the first pipe-line control valve door and gas pressure reducer and is inflated, will be by the first pipe-line control valve door to dress
Coal sample sample carrier is filled with CH with the rate of 1mL/min4High-pressure air source, the coal dust in the sample carrier that makes to coaling are in adsorption equilibrium shape
State, when gas pressure reaches certain value in sample carrier, automatic pressure control valve door opens moment, coal and methane gas outstanding
By being connected to releasing with graduated circular cone bobbin for sample carrier one end；
Step 7, using high-speed camera visual imaging technology with multi-angle by each protrusion of collision angle α, gas of fluorescence coal
The acquisition of gas volume Q information, the transport conditions in comprehensive accurate recording coal and gas prominent development process；
Step 8, acquisition coaling gas flow Q and time t in sample carrier data transmission into computerized information acquisition device, so
After make Q-t figure；Acquire the force value F on the instantaneous dynamometer at each moment；
Step 9. arranges experimental record, according to equation of state of real gas PV=nRTZ, analytical calculation data；According to fluorescence coal
Path analysis after collision angle α and collision calculates the force value F of prominent moment0 And angle [alpha] when prominent0 =α；
Step 10. replaces with the coal sample in sample carrier and coal sample density having the same, particle size, but the rock without adsorptivity
All product make the dead space of the sample carrier of all product of muck meet VRock is dead=VCoal is dead, repeat the above steps.
8. the detection method of coal and gas prominent according to claim 7, it is characterised in that: the fluorescence coal passes through
Fluorescent dye dyes coal of the partial size between 0.2-0.25mm, coal can be made to show color after dyeing, convenient for taking the photograph at a high speed
Camera information is collected, and does not change other properties of coal.
9. the detection method of coal and gas prominent according to claim 7, it is characterised in that: the coal sample dead space measurement
Device includes U-tube, coaling sample carrier and methane high-pressure air source, and the outlet of methane high-pressure air source is equipped with the first pipe-line control valve door,
The pipeline that sample carrier of coalingging is controlled to a vacuum pump is equipped with the second pipe-line control valve door, coaling sample carrier and methane high-pressure air source company
Logical and connecting pipe is equipped with pressure reducing valve；The first straight tube and the second straight tube that U-tube is connected to by bottom form, by adjusting first
The relative altitude of straight tube and the second straight tube adjusts the height of liquid level in U-tube；The connection of first straight tube and the second straight tube bottom
Pipe is equipped with the 4th pipe-line control valve door, the second straight tube connection of coaling sample carrier and U-tube and passes through third pipe-line control valve
Its opening and closing of door control；
Coal sample dead space measuring method are as follows:
1. collecting the helium of 200ml by drainage first in U-tube, red liquid is housed in graduated cylinder, is to receive above liquid
The helium of collection；
2. opening vacuum pump to be de-gassed sample carrier of coalingging, it is in negative pressure state in sample carrier of coalingging after degassing, closes
Second pipe-line control valve door；
It is at this time negative pressure in sample carrier, the helium in graduated cylinder is in negative pressure 3. opening the third of U-tube, the 4th pipe-line control valve door
It can be entered in sample carrier under effect, it is believed that helium occupies the dead space of sample carrier, adjusts the first straight tube of U-tube and second directly
The relative position of pipe, so that the holding of U-tube both ends liquid level moment maintains an equal level during into helium, if meniscus ends height is
VEventually, then entering helium volume in sample carrier is exactly 200-VEventually；
4. the height for adjusting U-tube makes the first straight tube of U-tube and the second straight tube when the helium in graduated cylinder does not enter back into sample carrier
Left and right liquid level is consistent, closes U-tube third, the 4th pipe-line control valve door, reads height where meniscus ends in U-tube,
The volume of the helium entered in sample carrier can be obtained, as coaling sample carrier dead space VCoal is dead。
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| CN109974798A (en) * | 2019-04-03 | 2019-07-05 | 阳泉煤业（集团）有限责任公司 | A kind of gas pressure-flow testing device |
| CN112730797A (en) * | 2020-12-19 | 2021-04-30 | 中煤科工集团重庆研究院有限公司 | Device for coal and gas outburst simulation test |
| CN113030085A (en) * | 2021-02-26 | 2021-06-25 | 深圳先进电子材料国际创新研究院 | Test system and method for monitoring curing volume shrinkage of resin composite material |
| CN113281187A (en) * | 2021-06-25 | 2021-08-20 | 临海伟星新型建材有限公司 | Pipe pressure resistance testing device and testing method thereof |
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| CN101487834A (en) * | 2009-02-06 | 2009-07-22 | 煤炭科学研究总院重庆研究院 | Combined test apparatus for coal and gas burst |
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| CN203275388U (en) * | 2013-06-14 | 2013-11-06 | 黑龙江科技学院 | Coal and gas outburst test device |
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