CN106370820B - The method that coal seam degree of oxidation in this coal seam concordant drilling is studied using nitrogen deslagging - Google Patents
The method that coal seam degree of oxidation in this coal seam concordant drilling is studied using nitrogen deslagging Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 125
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 239000003245 coal Substances 0.000 title claims abstract description 74
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 50
- 230000003647 oxidation Effects 0.000 title claims abstract description 35
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000000605 extraction Methods 0.000 claims abstract description 32
- 239000007789 gas Substances 0.000 claims abstract description 31
- 238000010276 construction Methods 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 230000000994 depressogenic effect Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 230000002045 lasting effect Effects 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000005065 mining Methods 0.000 abstract description 8
- 238000005086 pumping Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 5
- 230000002269 spontaneous effect Effects 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000034994 death Effects 0.000 description 1
- 231100000517 death Toxicity 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004047 hole gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
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Abstract
The invention discloses a kind of method that coal seam degree of oxidation in this coal seam concordant drilling is studied using nitrogen deslagging, comprise the following steps：Bore position is selected, determines construction parameter；Drilling construction is completed using nitrogen method for discharging residue, borehole gases and its component, concentration and borehole temperature are detected after sample acquisitions construction；Carry out drilling and sealing and extraction, gas and detect its component, concentration and borehole temperature in drilling hole after separately sampled collection sealing of hole and during extraction；Carry out data statistics and the drafting of figure.The advantage of the invention is that：Use nitrogen deslagging, the CO produced during concordant drilling construction is reduced from source, increase boring service life, improve hole pumping and mining effect, and continuously investigate borehole gases component and temperature, coal seam degree of oxidation is judged according to CO concentration and the variation tendency of borehole temperature, before abandoning it is simple according to CO concentration come the pattern that judges.
Description
Technical field
The present invention relates to coal mining technology field, more particularly to one kind to study this coal seam concordant drilling using nitrogen deslagging
The method of middle coal seam degree of oxidation.
Background technology
Mine fire is one of the major natural disasters in colliery.Mine fire can not only be such that mine is damaged by huge material
Lose, while it is also the important root for causing underground worker's injures and deaths.Underground coal mine spontaneous fire produce toxic and harmful gas and
The accidents such as the fire gases of initiation, gas explosion, serious threat miner's life security, deteriorates natural environment, has become restriction
One of key factor of Safety of Coal Mine Production.With scientific and technological progress and management development, million tons of ignitions of China's coal-mine
Although rate declines year by year, spontaneous fire in coal mine is still more serious.
It is important safety prevention measure using the pre- coal-bed gas of taking out of drilling in process of coal mining.Drilling, which is divided into, wears layer
Drilling and concordant drilling, layer-through drilling refer to the drilling constructed in stone head or heading to adjacent coal bed, concordant drilling
Refer to the drilling crept into along formation beds.Wherein, concordant drilling becomes the most basic shape of mash gas extraction since drilling utilization rate is high
Formula.It is more that air is used using boring mud in tradition pressure wind Slagoff method tap, i.e. deslagging gas during concordant drilling construction,
During being somebody's turn to do, compressed air reaches the bottom of drilling through drilling rod, and in the bottom of drilling, formation high speed is distinguished and admirable, so that boring mud be blowed to
Hell, is finally discharged into tunnel.Binding analysis spontaneous combustion of coal seam principle, the spontaneous combustion of coal be due to coal at room temperature first with
Oxidation self-heating occurs for the oxygen interaction (physical absorption, chemisorbed, chemical reaction) in air.Therefore, nature of coal seam is caused
The main reason for ignition except coal in itself spontaneous fire tendency in addition to, it is also related with two factors：First, oxidation rate will be accelerated to arrive
(one borehole oxidation rate can determine that CO concentration is in rising trend, explanation by the variation tendency of CO concentration to a certain degree
Oxidation rate is accelerated), second, heat accumulation is to a certain extent, i.e., temperature rises to a certain extent.But drill in above-mentioned concordant
In work progress, a large amount of compressed airs are injected into drilling, and substantial amounts of oxygen is provided for hole wall coal body；Meanwhile drill bit with
Coal wall interaction produces high temperature, causes coal body oxidation rate to be accelerated, and coal body oxidation discharges substantial amounts of carbon monoxide so that bores
There are substantial amounts of carbon monoxide and accumulation of heat after the pore-forming of hole, this brings serious hidden danger to the combustion explosion in coal seam, also especially evident
Show the importance of the judgement to this coal seam degree of oxidation.
So far, also it is no lack of some judgement research methods to coal seam degree of oxidation in this coal bed drilling work progress,
However, the pattern for being simple foundation CO concentration mostly to judge, not comprehensive enough；Sentenced in addition, working as using common coal seam degree of oxidation
Disconnected research method knows CO in the drilling in some stage, and selects drilling after CO exceedes a certain concentration in drilling to stop taking out or note
Water, and can be because the oxygen uptake effect of the coal soaked through water is strengthened, extraction again is allowed to more be also easy to produce CO, causes drilling to stop again
Take out, and constantly circulate, hole pumping and mining service life will be greatly shortened, and the judgement for influencing later stage coal seam degree of oxidation at the same time is ground
Study carefully.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides it is a kind of from source reduce drilling construction during CO generation,
Increase boring service life, improve hole pumping and mining effect, also, can be judged according to CO concentration and the variation tendency of borehole temperature
The method that coal seam degree of oxidation in this coal seam concordant drilling is studied using nitrogen deslagging of coal seam degree of oxidation.
The present invention realizes above-mentioned technique effect by following technological means：One kind studies this coal seam concordant using nitrogen deslagging
The method of coal seam degree of oxidation, comprises the following steps in drilling：
(1)：5-10 bore position is selected in this coal seam concordant, for follow-up drilling, and determines drilling construction ginseng
Number：Boring aperture, dip angle of hole and drilling depth；
(2)：What bore position, boring aperture, dip angle of hole and the drilling depth determined according to step (1) drilled applies
Work：The drill bit of the corresponding boring aperture of selection；Drilling machine is opened, drilling rod is rotated, starts to creep into, and opens pressure wind at the same time, makes nitrogen
Aperture is depressed into by drilling rod inner passage, discharges boring mud；Drilling rod is unloaded by adding, lasting drilling to corresponding drilling depth；
(3)：After the completion of construction, gas and its component and respective concentration are detected in drilling hole after sample acquisitions construction, at the same time
Measure borehole temperature；
(4)：Sealing of hole is carried out to drilling, gas and its component is detected in drilling hole after sample acquisitions sealing of hole after sealing of hole
And respective concentration, while measure borehole temperature；
(5)：Hose is connected to the extraction of drilling progress gas by way of closing stubble：By threeway and iron short circuit, will drill
Link together, it is more logical to be then connected to extraction from upper end with hose；Then continuous sampling gathers gas in drilling hole and detects
Its component and respective concentration, while measure borehole temperature；
(6)：Data statistics and graphic plotting.
Preferably, the boring aperture is diameter 100-120mm, and dip angle of hole is 0.5-1.5 °, drilling depth 130-
150m。
Preferably, the concrete mode that nitrogen is depressed into aperture by drilling rod inner passage in the step (2) is：Using ground
The highly concentrated nitrogen of note nitrogen machine filtering has laid note nitrogen pipeline by underground and has pressed wind deslagging pipeline to be connected with drilling machine, then passes through shut-off valve
Control press-in nitrogen tolerance, pressure, make in nitrogen press-in hole.
Preferably, the highly concentrated nitrogen is the nitrogen that concentration is 97%-100% concentration.
Preferably, the sealing of hole mode of drilling is " a two stifled notes " in the step (4).
Preferably, extraction way is that at least continual mode of 30 days is scheduled to last from after starting extraction in the step (5).
Preferably, the drilling hole composition of gases within and concentration are detected by gas chromatographicanalyzer.
Preferably, the borehole temperature is measured by infrared radiation thermometer.
Preferably, suitable for the non-coal seam concordant along in empty, drilling coverage.
The advantage of the invention is that：Using nitrogen deslagging, the CO produced during concordant drilling construction is reduced from source,
Increase boring service life, improve hole pumping and mining effect, and continuously investigate borehole gases component and temperature, according to CO concentration and brill
The variation tendency of hole temperature judges coal seam degree of oxidation, before abandoning it is simple according to CO concentration come the pattern that judges.
Brief description of the drawings
Fig. 1 is that the use nitrogen deslagging that the embodiment of the present invention 1 provides studies coal seam degree of oxidation in this coal seam concordant drilling
Method each drilling CH4Concentration and the graph of a relation of time；
Fig. 2 is that the use nitrogen deslagging that the embodiment of the present invention 1 provides studies coal seam degree of oxidation in this coal seam concordant drilling
Method each drilling CO concentration and the graph of a relation of time；
Fig. 3 is that the use nitrogen deslagging that the embodiment of the present invention 1 provides studies coal seam degree of oxidation in this coal seam concordant drilling
Method each drilling O2Concentration and the graph of a relation of time；
Fig. 4 is that the use nitrogen deslagging that the embodiment of the present invention 1 provides studies coal seam degree of oxidation in this coal seam concordant drilling
Each borehole temperature of method and the graph of a relation of time.
Embodiment
Elaborate below to the embodiment of the present invention, the present embodiment is carried out lower premised on technical solution of the present invention
Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementation
Example.
Embodiment 1
A kind of method that coal seam degree of oxidation in concordant drilling of this coal seam is studied using nitrogen deslagging, suitable for it is non-along it is empty,
Coal seam concordant in the coverage that drills, includes the following steps：
(1)：Transport along 7 bore positions of middle selection in zhangji colliery 17226, for follow-up drilling, be respectively labeled as
57#, 58#, 60#, 97#, 143#, 146#, 148#, and determine drilling construction parameter：Boring aperture diameter 113mm, dip angle of hole
1.4 °, drilling depth 140m；
(2)：The construction to drill：Selection diameter 113mm corresponds to the drill bit of boring aperture；Drilling machine is opened, drilling rod is inclined
Oblique 1.4 ° of rotations, start to creep into, and open pressure wind at the same time, nitrogen is depressed into aperture by drilling rod inner passage, discharge boring mud；It is logical
Cross plus unload drilling rod, lasting drilling to 140m drilling depths；Wherein, nitrogen is depressed into the concrete mode in aperture by drilling rod inner passage
For：Laid note nitrogen pipeline by underground using the highly concentrated nitrogen (97%-100%) of ground note nitrogen machine filtering presses wind to arrange with drilling machine
Slag pipeline connects, then controls press-in nitrogen tolerance, pressure by shut-off valve, makes in nitrogen press-in hole, produces compressed nitrogen at a high speed
It is distinguished and admirable.
(3)：After the completion of construction, gas and its component and respective concentration are detected in drilling hole after sample acquisitions construction, at the same time
Measure borehole temperature；
(4)：Sealing of hole is carried out to drilling by the way of " a two stifled notes ", is drilled after sample acquisitions sealing of hole after sealing of hole
Gas and its component and respective concentration are detected in hole, while measure borehole temperature；
(5)：Hose is connected to the extraction of drilling progress gas by way of closing stubble：By threeway and iron short circuit, will drill
Link together, it is more logical to be then connected to extraction from upper end with hose；Then continuous sampling gathers gas in drilling hole and detects
Its component and respective concentration, while measure borehole temperature；Wherein, extraction is a continuous continual process, and the present embodiment is adopted
Extraction way is the extraction way of at least 30 days from after starting extraction；Wherein, 57#, 58#, 60#, 97# drilling were in 2014 years
November 3 started extraction, ended accumulative extraction 45 days on December 17；143#, 146#, 148# drilling were opened on November 5th, 2014
Beginning extraction, ends accumulative extraction 43 days on December 17；
In addition, above-mentioned drilling hole composition of gases within and concentration pass through gas chromatographicanalyzer check analysis, drilling orifice temperature
Degree is measured using infrared radiation thermometer, and the present embodiment will analyze coal seam oxygen by observing borehole gases concentration and temperature variations
Change degree；
(6)：By gas chromatographicanalyzer check analysis, drilling hole composition of gases within is CO, CH4And O2, further to it
Data statistics and the drafting of figure are carried out, specific data are shown in Table shown in 1 (data statistic analysis table after hole pumping and mining), and each drilling is taken out
Adopt each gas (CO, CH in front and rear gaps4、O2) concentration, the relation of temperature and time be depicted as figure, as shown in Figs 1-4, wherein, figure
1 is using the date as abscissa, CH4Each drilling CH4 concentration and the graph of a relation of time that concentration is drawn out for ordinate, Fig. 2 be with
Date is abscissa, CO concentration is each drilling CO concentration and the graph of a relation of time that ordinate is drawn out, and Fig. 3 is using the date as horizontal stroke
Coordinate, O2Concentration is each borehole temperature and the graph of a relation of time that ordinate is drawn out, and Fig. 4 is using the date as abscissa, temperature
Each borehole temperature and the graph of a relation of time drawn out for ordinate.
Data statistic analysis table after 1 hole pumping and mining of table
Interpretation of result：
(1) according to table 1 and Fig. 2, before extraction, CO concentration is smaller in drilling, but after extraction, CO concentration raises rapidly, explanation
Constructed using nitrogen deslagging, drilling can reduce oxygen into CO is produced inside coal body, can be greatly decreased before extraction in drilling
CO concentration, but oxygen in tunnel cannot be prevented and diffuse to drilling orifice periphery coalmass crevasse (diffusion depth is shallower), so that not
It is avoided that before extraction that drilling is interior and produces a small amount of CO；After extraction, extraction negative pressure causes oxygen to enter borehole circumference coalmass crevasse speed
Increase in (deep), generation CO speed increases, CO concentration improves in drilling；
(2) as shown in Figure 2, CO concentration is in rising trend into totality in drilling, in addition to 146#, 148# hole, the CO in drilling
Concentration is both greater than 50ppm within the longer extraction time, and wherein 58# has 3 days CO concentration in more than 100ppm.Respectively drill in the extraction phase
Between CO statistical conditions it is as shown in table 2：
2 CO concentration of table is segmented statistical form
(3) as shown in Figure 4, borehole temperature is not overall high, and for maximum up to 29.2 DEG C, the most of the time is maintained at less than 27 DEG C,
And borehole temperature does not have ascendant trend；
(4) 57#, 58# and 60# drill CO concentration it is higher, more than 2/3 time in more than 50ppm, wherein 57# holes temperature most
It is 28.7 DEG C big, it is 26.3 DEG C average；58# borehole temperatures are 27.1 DEG C maximum, 25.7 DEG C average；29.2 DEG C of 60# holes maximum temperature, it is average
26.2℃；Wherein there are 3 days CO in 58# holes more than 100ppm, and when extraction is continued in the hole, borehole temperature is not still high, and does not rise
Trend, this explanation CO concentration is when reaching 100ppm, drilling it is also possible to continue safe extraction (i.e. at this time coal seam degree of oxidation compared with
It is low)；
(5) respectively drilling CO concentration is in rising trend, but borehole temperature illustrates merely by CO concentration not in the trend of liter
Variation tendency not can determine that coal seam degree of oxidation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (9)
- A kind of 1. method that coal seam degree of oxidation in this coal seam concordant drilling is studied using nitrogen deslagging, it is characterised in that including Following steps：(1)：5-10 bore position is selected in this coal seam concordant, for follow-up drilling, and determines drilling construction parameter：Bore Hole aperture, dip angle of hole and drilling depth；(2)：The construction that bore position, boring aperture, dip angle of hole and the drilling depth determined according to step (1) drills： The drill bit of the corresponding boring aperture of selection；Drilling machine is opened, drilling rod is rotated, starts to creep into, and opens pressure wind at the same time, passes through nitrogen Drilling rod inner passage is depressed into aperture, discharges boring mud；Drilling rod is unloaded by adding, lasting drilling to corresponding drilling depth；(3)：After the completion of construction, gas and its component and respective concentration are detected in drilling hole after sample acquisitions construction, is measured at the same time Borehole temperature；(4)：Sealing of hole is carried out to drilling, gas and its component and phase are detected in drilling hole after sample acquisitions sealing of hole after sealing of hole Concentration is answered, while measures borehole temperature；(5)：Hose is connected to the extraction of drilling progress gas by way of closing stubble：By threeway and iron short circuit, drilling is connected Together, then extraction is connected to from upper end with hose to lead to more；Then continuous sampling collection drilling hole in gas and detect its into Point and respective concentration, while measure borehole temperature；(6)：Data statistics and graphic plotting.
- 2. the method according to claim 1 that coal seam degree of oxidation in this coal seam concordant drilling is studied using nitrogen deslagging, It is characterized in that, the boring aperture is diameter 100-120mm, dip angle of hole is 0.5-1.5 °, drilling depth 130-150m.
- 3. the method according to claim 1 that coal seam degree of oxidation in this coal seam concordant drilling is studied using nitrogen deslagging, It is characterized in that, the concrete mode that nitrogen is depressed into aperture by drilling rod inner passage in the step (2) is：Nitrogen is noted using ground The highly concentrated nitrogen of machine filtering has laid note nitrogen pipeline by underground and has pressed wind deslagging pipeline to be connected with drilling machine, then is controlled by shut-off valve Nitrogen tolerance, pressure are pressed into, is made in nitrogen press-in hole.
- 4. the method according to claim 3 that coal seam degree of oxidation in this coal seam concordant drilling is studied using nitrogen deslagging, It is characterized in that, the highly concentrated nitrogen is the nitrogen that concentration is 97%-100% concentration.
- 5. the method according to claim 1 that coal seam degree of oxidation in this coal seam concordant drilling is studied using nitrogen deslagging, It is characterized in that, the sealing of hole mode of drilling is " a two stifled notes " in the step (4).
- 6. the method according to claim 1 that coal seam degree of oxidation in this coal seam concordant drilling is studied using nitrogen deslagging, It is characterized in that, extraction way is that at least continual mode of 30 days is scheduled to last from after starting extraction in the step (5).
- 7. the method according to claim 1 that coal seam degree of oxidation in this coal seam concordant drilling is studied using nitrogen deslagging, It is characterized in that, the drilling hole composition of gases within and concentration are detected by gas chromatographicanalyzer.
- 8. the method according to claim 1 that coal seam degree of oxidation in this coal seam concordant drilling is studied using nitrogen deslagging, It is characterized in that, the borehole temperature is measured by infrared radiation thermometer.
- 9. coal seam degree of oxidation in this coal seam concordant drilling is studied using nitrogen deslagging according to claim 1-8 is any Method, it is characterised in that suitable for the non-coal seam concordant along in empty, drilling coverage.
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| CN107063989A (en) * | 2017-05-19 | 2017-08-18 | 西南交通大学 | A kind of rock stratum concordant aoxidizes acid etching reaction test device |
| CN111579282A (en) * | 2020-05-28 | 2020-08-25 | 安徽理工大学 | In-situ detection method for primary CO in coal bed |
| CN113586012A (en) * | 2021-08-04 | 2021-11-02 | 煤炭科学研究总院 | Method and device for determining bedding gas extraction drilling and sealing parameters |
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| CN104614201A (en) * | 2015-02-13 | 2015-05-13 | 中国矿业大学(北京) | Method for measuring raw CO gas content of coal seam |
| CN105041247A (en) * | 2015-08-20 | 2015-11-11 | 淮南矿业(集团)有限责任公司 | Slag-discharge system using nitrogen |
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