CN110243721A - A kind of stope multi-source Predicting Gas method based on carbon-hydrogen isotopes - Google Patents
A kind of stope multi-source Predicting Gas method based on carbon-hydrogen isotopes Download PDFInfo
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- 239000007789 gas Substances 0.000 title claims abstract description 270
- 239000001257 hydrogen Substances 0.000 title claims abstract description 72
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000003245 coal Substances 0.000 claims abstract description 212
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 63
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 62
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 150000002431 hydrogen Chemical class 0.000 claims description 15
- 238000005553 drilling Methods 0.000 claims description 7
- 238000005065 mining Methods 0.000 claims description 7
- 238000010835 comparative analysis Methods 0.000 claims description 4
- 239000005030 aluminium foil Substances 0.000 claims description 3
- -1 hydrogen Chemical class 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 32
- 238000004458 analytical method Methods 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 4
- 238000004445 quantitative analysis Methods 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract description 2
- 238000012067 mathematical method Methods 0.000 abstract 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000013508 migration Methods 0.000 description 4
- 230000005012 migration Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
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Abstract
The present invention relates to mine gas Treatment process field, specifically a kind of stope multi-source Predicting Gas method based on carbon-hydrogen isotopes.The present invention is mainly to analyze single coal bed methane gas and the corresponding δ of multiple coal seam mixing methane gas by carrying out laboratory air component analysis and carbon-hydrogen isotopes test to the live coal sample taken and gas gas sample13C(CH4), δ D (CH4) and δ13C(CO2) etc. carbon, hydrogen isotope form difference, with mathematical method, determine stope multi-source gas source and ratio in taken gas sample.The present invention uses carbon, hydrogen isotope analysis method, the composition characteristic and Source proportion in mixing methane gas in the taken gas sample of quantitative analysis, propose new stope multi-source Predicting Gas method, foundation is provided for this coal bed gas extraction and the improvement of this coal-bed gas, specify gas source, administering gas just seems with a definite target in view, avoids and blindly administers and unnecessary investment.
Description
Technical field
The present invention relates to mine gas Treatment process field, specifically a kind of actual mining based on carbon-hydrogen isotopes
Face multi-source Predicting Gas method.
Background technique
In the Gas of fully-mechanized mining working, the gas that Adjacent Working Face gas pours into this working face of coal seam accounts for very high
Ratio, while being also the basic reason for causing gas exceeding limit.Reasonable draft type can alleviate gas to a certain extent and control
The pressure of reason, by carrying out extraction, watt that can be effectively prevented in working face and return to the gas for accumulating in goaf
This excessive concentration.Coal seam is covered during multiple seam minings, in research to the gas migration rule of this seam mining working face
And gush out that ratio is most important, so as to effectively reinforce the gas control of adjacent layer, ensure that this working face of coal seam safety is high
Imitate back production.However gas source use point source predicted method is predicted at present, can not accurate quantitative analysis prediction adjacent layer watt
This.
At this stage, the development advanced by leaps and bounds by the discussion of scholars' many years, gas migration theory in China, but
Be about multi-source gas migration rule research be not also it is very much, even if some researchs have also been made, also with computer fluid
Machine software can not specifically quantify multi-source Gas source and ratio (before for multi-source gas with the means of numerical simulation
Prediction be also based only on empirical means).Therefore, the new method of one kind is needed to solve the above problems.
Summary of the invention
Aiming at the defects existing in the prior art, the technical problem to be solved in the present invention is to provide one kind to be based on
The stope multi-source Predicting Gas method of carbon-hydrogen isotopes.
Present invention technical solution used for the above purpose is: a kind of stope based on carbon-hydrogen isotopes
Multi-source Predicting Gas method, comprising the following steps:
S1: obtaining the first coal sample and the first gas sample respectively in existing working seam, in the upper adjacent coal seam of existing working seam
It is middle to obtain the second coal sample and the second gas sample respectively, third coal sample and third are obtained respectively in the lower adjacent coal seam of existing working seam
Gas sample obtains the 4th gas sample in the goaf of existing working seam working face or obtains in the air return lane of existing working seam working face
Take the 5th gas sample；
S2: the gas component of first coal sample, the second coal sample and third coal sample is tested respectively (referring in particular to AQ1066-
2008 coal seam gas-bearing capacity underground Direct Determinations)；First gas sample, the second gas sample, third gas sample, the 4th are tested respectively
Gas sample or the corresponding CH of the 5th gas sample4Isotope value, the CH of middle carbon4The isotope value and CO of middle hydrogen2The isotope value of middle carbon；
S3: the feature of the isotope value of the isotope value and hydrogen of the corresponding carbon of comparative analysis different coal finds out different coals
Interval value corresponding to the isotope value of carbon and the isotope value of hydrogen of layer, so that it is determined that existing working seam face gas comes
Source；
S4: calculating volume fraction in the 4th gas sample of the first gas sample, the second gas sample, third gas sample, i.e. existing working seam
Face gas ratio；Or calculate the volume fraction of the first gas sample, the second gas sample, third gas sample in the 5th gas sample, i.e., it now opens
The gas ratio of the air return lane of mining coal seam working face.
First coal sample, the second coal sample and third coal sample, which are fitted into coal sample tank, to be sealed；First gas sample, the second gas
Sample, third gas sample, the 4th gas sample and the 5th gas sample are sealed with aluminium foil bag.
First coal sample, the second coal sample and third coal sample are respectively in working seam, upper adjacent coal seam and lower adjacent coal seam
Middle construction concordant drilling obtains；First gas sample, the second gas sample, third gas sample are drilled by double-strand ball collector in concordant
Middle part obtains.
The existing working seam face gas ratio is calculated by solving following formula:
Wherein, x, y, z is the coal watt in the 4th gas sample containing upper adjacent coal seam, lower adjacent coal seam and existing working seam respectively
The volume fraction of this gas, a are CH in the second gas sample4The isotope value of carbon, b are CH in third gas sample4The isotope value of carbon, c are
CH in first gas sample4The isotope value of carbon, d are CH in the 4th gas sample4The isotope value of carbon, a ' are CH in the second gas sample4Hydrogen it is same
Position element value, b ' are CH in third gas sample4The isotope value of hydrogen, c ' are CH in the first gas sample4The isotope value of hydrogen, d ' are the 4th gas
CH in sample4The isotope value of hydrogen.
The gas ratio of the air return lane of the existing working seam working face is calculated by solving following formula:
Wherein, x ', y ', z ' are in the 5th gas sample respectively containing upper adjacent coal seam, lower adjacent coal seam and existing working seam
The volume fraction of coal methane gas, a are CH in the second gas sample4Carbon isotope value, b be third gas sample in CH4The isotope of carbon
Value, c are CH in the first gas sample4The isotope value of carbon, f are CH in the 5th gas sample4Carbon isotope value, a ' be the second gas sample in
CH4The isotope value of hydrogen, b ' are CH in third gas sample4The isotope value of hydrogen, c ' are CH in the first gas sample4The isotope value of hydrogen, f '
For CH in the 5th gas sample4The isotope value of hydrogen.
The present invention has the following advantages and beneficial effects:
1. the present invention uses carbon, hydrogen isotope analysis method, in the mixing methane gas in the taken gas sample of quantitative analysis
Composition characteristic and Source proportion, the perfect prediction technique of multi-source gas emission is this coal bed gas drainage and this coal
Layer gas control provides foundation, specifies gas source, and administering gas just seems with a definite target in view, avoids and blindly administers and not
Necessary investment.
2. being obtained using carbon isotope and hydrogen isotope as the condition mutually constrained by the method that optimization obtains optimal value
The composition ratio in this coal-bed gas source provides theoretical direction and technical support for coal-bed gas source, can generate apparent warp
Benefit of helping and social benefit determine that coal-bed gas source is with a wide range of applications during seam mining.
3. carbon-hydrogen isotopes test analysis stope multi-source gas and its migration rule administer this coal-bed gas
With vital economic benefit and social benefit.
Detailed description of the invention
Fig. 1 is the method for the present invention flow chart；
Fig. 2 is Carbon Isotope Characteristics schematic diagram in certain mine different coal methane in the embodiment of the present invention；
Fig. 3 is Carbon Isotope Characteristics schematic diagram in carbon dioxide in certain mine different coal methane in the embodiment of the present invention；
Fig. 4 is hydrogen Carbon Isotope Characteristics schematic diagram in certain mine different coal methane in the embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and embodiments.
As shown in Figure 1, a kind of stope multi-source Predicting Gas method based on carbon-hydrogen isotopes, belongs to working face watt
A kind of method of this prediction of gas emission, be chiefly used in highly gassy mine and projecting mine the analysis of stope gas source and its
Gush out ratio calculating, comprising the following steps:
S1: obtaining the first coal sample and the first gas sample respectively in existing working seam, in the upper adjacent coal seam of existing working seam
It is middle to obtain the second coal sample and the second gas sample respectively, third coal sample and third are obtained respectively in the lower adjacent coal seam of existing working seam
Gas sample obtains the 4th gas sample in the goaf of existing working seam working face or obtains in the air return lane of existing working seam working face
Take the 5th gas sample；
S2: the gas component of first coal sample, the second coal sample and third coal sample is tested respectively (referring in particular to AQ1066-
2008 coal seam gas-bearing capacity underground Direct Determinations)；Test first gas sample, the second gas respectively with isotope mass spectrometer
Sample, third gas sample, the 4th gas sample or the corresponding CH of the 5th gas sample4Isotope value, the CH of middle carbon4The isotope value and CO of middle hydrogen2In
The isotope value of carbon；
S3: the feature of the isotope value of the isotope value and hydrogen of the corresponding carbon of comparative analysis different coal finds out different coals
Interval value corresponding to the isotope value of carbon and the isotope value of hydrogen of layer, so that it is determined that the gas of existing working seam working face comes
Source；
S4: calculating volume fraction in the 4th gas sample of the first gas sample, the second gas sample, third gas sample, i.e. existing working seam
The gas ratio of working face；Or calculate the volume fraction of the first gas sample, the second gas sample, third gas sample in the 5th gas sample, i.e., it is existing
The gas ratio of the air return lane of working seam working face.
First coal sample, the second coal sample and third coal sample, which are fitted into coal sample tank, to be sealed；First gas sample, the second gas
Sample, third gas sample, the 4th gas sample and the 5th gas sample are sealed with aluminium foil bag.First coal sample, the second coal sample and third coal sample point
Concordant of constructing not in working seam, upper adjacent coal seam and lower adjacent coal seam drilling obtains；First gas sample, the second gas sample,
Third gas sample is obtained in the middle part of concordant drilling by double-strand ball collector.
The gas ratio of the existing working seam working face is calculated by solving following formula:
Wherein, x, y, z is the coal watt in the 4th gas sample containing upper adjacent coal seam, lower adjacent coal seam and existing working seam respectively
The volume fraction of this gas, a are CH in the second gas sample4The isotope value of carbon, b are CH in third gas sample4The isotope value of carbon, c are
CH in first gas sample4The isotope value of carbon, d are CH in the 4th gas sample4The isotope value of carbon, a ' are CH in the second gas sample4Hydrogen it is same
Position element value, b ' are CH in third gas sample4The isotope value of hydrogen, c ' are CH in the first gas sample4The isotope value of hydrogen, d ' are the 4th gas
CH in sample4The isotope value of hydrogen.
The gas ratio of the air return lane of the existing working seam working face is calculated by solving following formula:
Wherein, x ', y ', z ' are in the 5th gas sample respectively containing upper adjacent coal seam, lower adjacent coal seam and existing working seam
The volume fraction of coal methane gas, a are CH in the second gas sample4Carbon isotope value, b be third gas sample in CH4The isotope of carbon
Value, c are CH in the first gas sample4The isotope value of carbon, f are CH in the 5th gas sample4Carbon isotope value, a ' be the second gas sample in
CH4The isotope value of hydrogen, b ' are CH in third gas sample4The isotope value of hydrogen, c ' are CH in the first gas sample4The isotope value of hydrogen, f '
For CH in the 5th gas sample4The isotope value of hydrogen.
Ratio calculating is analyzed and its gushed out to stope multi-source Predicting Gas based on carbon-hydrogen isotopes of the invention
Method includes the following steps: in one embodiment of the invention
Step 1: by taking certain mine as an example, existing working seam is the coal seam 15#, and upper adjacent coal seam is respectively the coal seam 3# and the coal seam 9#,
Concordant of constructing in the coal seam existing working seam 15# and the coal seam upper contiguous seam 3# and the coal seam the 9# horizontal river of air return lane drilling each one, side
Parallactic angle is 90 °, and inclination angle is 0 °, installs second coal sample, the third coal sample in the coal seam 9# and 15# in the coal seam 3# respectively with three coal sample tanks
First coal sample in coal seam, and seal, it send to laboratory and carries out gas composition analysis chemical examination.It is acquired in three drillings with double-strand ball
The gas gas sample (the second gas sample, third gas sample and the first gas sample) in this coal seam in the coal seam 3#, the coal seam 9# and the coal seam 15#, and use aluminium
The sealing of foil bag.In the coal seam 15#, 1306 stope collects the gas sample (the 4th gas sample) in goaf, 1306 back production works with double-strand ball
Make the gas sample (the 5th gas sample) of face air return lane.
Step 2: in the first coal sample of laboratory test, the second coal sample, the gas component of third coal sample, isotope mass spectrometry is used
Instrument tests the first gas sample, the second gas sample, third gas sample, the 4th gas sample and the corresponding δ of the 5th gas sample13C(CH4), δ D (CH4) and δ13C(CO2).The δ13C(CH4), δ D (CH4) and δ13C(CO2) it is respectively CH4Isotope value, the CH of middle carbon4The same position of middle hydrogen
Element value and CO2The isotope value of middle carbon.
Wherein Fig. 2 is certain mine A coal (3# coal), B coal (9# coal), the corresponding CH of C coal (15# coal)4In carbon isotope value, by
In know the corresponding interval range of carbon isotope value of A coal (3# coal) be -28~-34, B coal (9# coal) carbon isotope value it is corresponding
Interval range be -38~-42, C coal (15# coal) the corresponding interval range of carbon isotope value be -40~-44,3# coal, 9# coal
There is apparent interval range with the carbon isotope value in the coal seam 15#, the coal seam belonging to it can be told easily from carbon isotope value.
Wherein Fig. 2 is certain mine A coal (3# coal), B coal (9# coal), the corresponding CO of C coal (15# coal)2In carbon isotope value, by
In the CO for knowing A coal (3# coal)2The corresponding interval range of carbon isotope value be -14.1~-15, B coal (9# coal) CO2Carbon
The corresponding interval range of isotope value is -13~-13.9, C coal (15# coal) CO2The corresponding interval range of carbon isotope value
It is the CO of -12~-12.9,3# coal, 9# coal and the coal seam 15#2Carbon isotope value have apparent interval range, can be from the same position of carbon
Plain value tells the coal seam belonging to it easily.
Wherein Fig. 3 is certain mine A coal (3# coal), B coal (9# coal), the corresponding CH of C coal (15# coal)4In hydrogen isotope value,
Due to knowing the CH of A coal (3# coal)4In the corresponding interval range of isotope value of hydrogen be -197~-212, B coal (9# coal)
CH4In the corresponding interval range of hydrogen isotope value be -145~-150, C coal (15# coal) CH4In hydrogen isotope value it is corresponding
Interval range is the CO of -170~-199,3# coal, 9# coal and the coal seam 15#2Hydrogen isotope value have apparent interval range, can
Tell the coal seam belonging to it easily from carbon isotope value.
Step 3: the corresponding δ of comparative analysis different coal13C, the feature of δ D finds out the δ of different coal13C, corresponding to δ D
Interval value, so that it is determined that mixing gas gas sample gas source and its ratio；The δ13C, δ D are respectively the isotope of carbon
The isotope value of value and hydrogen.
The gas sample and No. 15 coal seams 1306 work face goaf acquired respectively with No. 15 1306 tailentries of coal seam is adopted
For the gas sample of collection, illustrate specifically calculating for the prediction technique in face gas source and its ratio based on carbon-hydrogen isotopes
Journey；
(the 5th gas sample, gas are the coal seam 3#, the coal seam 9# and 15# to the gas acquired for No. 15 1306 air return lanes of coal seam
The mixed gas of coal-bed gas), the volume fraction for setting 3# coal methane gas in mixed gas sample (the 5th gas sample) respectively is x,
The volume fraction of 9# coal methane gas is y, and the volume fraction of 15# coal methane gas is z, wherein the carbon isotope of A coal (3# coal)
Being worth corresponding interval range is -29~-32, participates in calculating according to measured value -31.The carbon isotope value of B coal (9# coal) is corresponding
Interval range is -38~-40, participates in calculating according to measured value -40.The corresponding interval range of carbon isotope value of C coal (15# coal)
It is -42~-44, participates in calculating according to measured value -42.5.C coal (15# coal) CH4In the corresponding interval range of hydrogen isotope value
It is -170~-199, No. 15 1306 tailentry gas sample hydrogen isotope values of coal seam participate in calculating according to measured value -183.5,
No. 15 coal seams 1306 work face goaf gas sample hydrogen isotope value according to the participation calculating of measured value -172.5, and No. 15 coal seams 1306 are returned
The gas CH of air way acquisition4The isotope measured value of carbon be 36.8, hydrogen isotope measured value is -183.5, A coal (3# coal)
Hydrogen isotope measured value is that the hydrogen isotope measured value of -197.9, B coal (3# coal) is the hydrogen isotope reality of -149, C coal (15# coal)
Measured value is -194.8.Then have:
By can be calculated, x=0.43, y=0.28, z=0.29.That is the gas of 1306 tailentries acquisition, 3#
It is 28%, 15# coal-bed gas volume fraction is 29% that coal-bed gas volume fraction, which is 43%, 9# coal-bed gas volume fraction,.This
Illustrate the gas ingredient in adopted gas sample in 1306 air return lane of the coal seam 15#, the gas ingredient in the coal seam 3# is in the majority, the coal seam 3# and
Crack between the coal seam 15# has penetrated through, therefore the methane gas in the coal seam 3# starts to pour into the coal seam 15#.The coal seam 9# also has one
It point pours into gas and pours into the coal seam 15#.
For the gas of the existing goaf in No. 15 coal seams 1306 (goaf is not closed, and working face is producing) acquisition
(the neighbouring working face of XV1306 is the mixing gas sample of XV1304 and XV1305), wherein the carbon isotope value of A coal (3# coal) is corresponding
Interval range be -29~-32, according to measured value -31 participate in calculate.The corresponding section model of carbon isotope value of B coal (9# coal)
Enclosing is -38~-40, participates in calculating according to measured value -40.The corresponding interval range of carbon isotope value of C coal (15# coal) is -42
~-44 participate in calculating according to measured value -42.5.The gas CH of No. 15 existing goafs in coal seam 1306 acquisition4Carbon isotope
Measured value is 39, and hydrogen isotope measured value is that the hydrogen isotope measured value of -172.2, A coal (3# coal) is -197.9, B coal (3# coal)
Hydrogen isotope measured value be the hydrogen isotope measured value of -149, C coal (15# coal) be -194.8.Then have:
By can be calculated, x=0.2, y=0.5, z=0.3.That is the gas of the goaf XV1306 acquisition, 3# coal-bed gas
It is 50%, 15# coal-bed gas volume fraction is 30% that volume fraction, which is 20%, 9# coal-bed gas volume fraction,.There is experimental result
It is found that 1306 working face of the coal seam 15# is during exploitation, the coal seam adjacent layer 9# accounts for 50% to the Gas in the coal seam 15#
Left and right, it is seen that the Gas of adjacent layer is the main source of stope and gas at upper corner, and the later period should be reinforced to neighbour
The improvement of nearly layer gas.
Above example is used only as illustrating technical solution of the present invention rather than limit that this specification is only for ternary different coal
Gas mixed gas calculating.
Claims (5)
1. a kind of stope multi-source Predicting Gas method based on carbon-hydrogen isotopes, which comprises the following steps:
S1: obtaining the first coal sample and the first gas sample respectively in existing working seam, divides in the upper adjacent coal seam of existing working seam
The second coal sample and the second gas sample are not obtained, obtain third coal sample and third gas respectively in the lower adjacent coal seam of existing working seam
Sample obtains the 4th gas sample in the goaf of existing working seam working face or obtains in the air return lane of existing working seam working face
5th gas sample；
S2: the gas component of first coal sample, the second coal sample and third coal sample is tested respectively (referring in particular to AQ1066-2008
Coal seam gas-bearing capacity underground Direct Determination)；First gas sample, the second gas sample, third gas sample, the 4th gas sample are tested respectively
Or the 5th corresponding CH of gas sample4Isotope value, the CH of middle carbon4The isotope value and CO of middle hydrogen2The isotope value of middle carbon；
S3: the feature of the isotope value of the isotope value and hydrogen of the corresponding carbon of comparative analysis different coal finds out different coal carbon
Isotope value and hydrogen isotope value corresponding to interval value, so that it is determined that the return air of existing working seam working face or working face
The gas source in lane；
S4: the volume fraction of the first gas sample, the second gas sample, third gas sample in the 4th gas sample is calculated, i.e., now working seam works
Face gas source ratio；Or calculate the volume fraction of the first gas sample, the second gas sample, third gas sample in the 5th gas sample, i.e., it now opens
The gas ratio of the air return lane of mining coal seam working face.
2. the stope multi-source Predicting Gas method according to claim 1 based on carbon-hydrogen isotopes, feature exist
In first coal sample, the second coal sample and third coal sample, which are fitted into coal sample tank, to be sealed；First gas sample, the second gas sample, third
Gas sample, the 4th gas sample or the 5th gas sample are sealed with aluminium foil bag.
3. the stope multi-source Predicting Gas method according to claim 1 based on carbon-hydrogen isotopes, feature exist
In first coal sample, the second coal sample and third coal sample are constructed in working seam, upper adjacent coal seam and lower adjacent coal seam respectively
Concordant drilling obtains；First gas sample, the second gas sample, third gas sample are obtained in the middle part of concordant drilling by double-strand ball collector
It takes.
4. the stope multi-source Predicting Gas method according to claim 1 based on carbon-hydrogen isotopes, feature exist
In the existing working seam face gas Source proportion is calculated by solving following formula:
Wherein, x, y, z is the coal device in Gas in the 4th gas sample containing upper adjacent coal seam, lower adjacent coal seam and existing working seam respectively
The volume fraction of body, a are CH in the second gas sample4The isotope value of carbon, b are CH in third gas sample4The isotope value of carbon, c first
CH in gas sample4The isotope value of carbon, d are CH in the 4th gas sample4The isotope value of carbon, a ' are CH in the second gas sample4The isotope of hydrogen
Value, b ' are CH in third gas sample4The isotope value of hydrogen, c ' are CH in the first gas sample4The isotope value of hydrogen, d ' are in the 4th gas sample
CH4The isotope value of hydrogen.
5. the stope multi-source gas source prediction technique according to claim 1 based on carbon-hydrogen isotopes, special
Sign is that the gas ratio of the air return lane of the existing working seam working face is calculated by solving following formula:
Wherein, x ', y ', z ' are the coal watt in the 5th gas sample containing upper adjacent coal seam, lower adjacent coal seam and existing working seam respectively
The volume fraction of this gas, a are CH in the second gas sample4Carbon isotope value, b be third gas sample in CH4The isotope value of carbon, c
For CH in the first gas sample4The isotope value of carbon, f are CH in the 5th gas sample4Carbon isotope value, a ' be the second gas sample in CH4Hydrogen
Isotope value, b ' be third gas sample in CH4The isotope value of hydrogen, c ' are CH in the first gas sample4The isotope value of hydrogen, f ' are the
CH in five gas samples4The isotope value of hydrogen.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111398557A (en) * | 2020-03-26 | 2020-07-10 | 太原理工大学 | Method for accurately identifying residual coal gas extraction proportion of mining area |
| CN113623005A (en) * | 2021-09-06 | 2021-11-09 | 中煤科工集团沈阳研究院有限公司 | Method for identifying mixed gas mined from coal seam groups |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111398557A (en) * | 2020-03-26 | 2020-07-10 | 太原理工大学 | Method for accurately identifying residual coal gas extraction proportion of mining area |
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| CN117094837A (en) * | 2023-10-19 | 2023-11-21 | 太原理工大学 | Gas extraction method based on hydrocarbon isotope and CS-BP neural network model |
| CN117094837B (en) * | 2023-10-19 | 2024-01-26 | 太原理工大学 | Gas extraction method based on hydrocarbon isotope and CS-BP neural network model |
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