CN106837406A - A kind of coal seam with gas multistage anti-reflection method - Google Patents
A kind of coal seam with gas multistage anti-reflection method Download PDFInfo
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- CN106837406A CN106837406A CN201710110258.0A CN201710110258A CN106837406A CN 106837406 A CN106837406 A CN 106837406A CN 201710110258 A CN201710110258 A CN 201710110258A CN 106837406 A CN106837406 A CN 106837406A
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- 239000003245 coal Substances 0.000 title claims abstract description 110
- 238000001028 reflection method Methods 0.000 title claims abstract description 15
- 230000000694 effects Effects 0.000 claims abstract description 17
- 238000005086 pumping Methods 0.000 claims abstract description 17
- 238000004880 explosion Methods 0.000 claims abstract description 10
- 230000003667 anti-reflective effect Effects 0.000 claims abstract description 9
- 238000003325 tomography Methods 0.000 claims abstract description 8
- 239000002253 acid Substances 0.000 claims description 18
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 12
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 2
- 238000002513 implantation Methods 0.000 claims description 2
- 230000035699 permeability Effects 0.000 abstract description 12
- 238000004321 preservation Methods 0.000 abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 239000011435 rock Substances 0.000 description 8
- 239000002817 coal dust Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005481 NMR spectroscopy Methods 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229960004887 ferric hydroxide Drugs 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002189 fluorescence spectrum Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses a kind of coal seam with gas multistage anti-reflection method, first, ocurrence of coal seam Regional Geological Conditions, the degree of metamorphism of coal, the species of coal and Gas explosion burns are determined；Secondly, whether tomography, fold position are according to coal seam, take different schemes to realize that the one-level of coal seam with gas is anti-reflection and is tested to antireflective effect, if meeting desired effects, whole coal seam carried out using the anti-reflection scheme of one-level anti-reflection；If being unsatisfactory for desired effects, on the basis of one-level is anti-reflection, two-stage acidulation is carried out to coal seam with gas anti-reflection；Finally, the anti-reflection end of two-stage acidulation is treated, gas pumping is carried out to coal seam with gas.The present invention formulates different anti-reflection schemes according to coal seam difference preservation Outline of regional geological setting, with stronger specific aim, while substantially increasing gas permeability of coal seam after taking multistage anti-reflection, improves gas pumping rate.
Description
Technical field
The present invention relates to a kind of coal seam with gas anti-reflection method, more particularly to a kind of coal seam with gas multistage anti-reflection method,
Belong to colliery gas prevention and protrude safe Treatment process field.
Background technology
China is coal production state and country of consumption maximum in the world, and coal occupies importantly in China's energy resource structure
Position.In recent years, China's coal-mine is very big in input for security, also achieves preferable effect.But coal mining accident happens occasionally.
Statistics shows, mine gas accident and roof accident account for more than the 80% of total accident, wherein mine gas accident because density of infection is strong,
Casualty rate is high, cause economy to damage the first killer that is big and turning into colliery.It can be seen that, mine gas is administered to turn into reduce and even prevented watt
The basic place of this accident.And the low key factor for having become restriction coal bed gas extraction of permeability, coal seam permeability is improved,
It is the fundamental way of Achievements of Gas Control and the utilization of resources.
Engineering practice shows, the permeability of coal seam with gas integrality with itself and residing ambient stress are related,
The coal seam with gas permeability significant difference in different preservation regions.The anti-reflection main technique methods in current coal seam have hydraulic fracturing to increase
Thoroughly, high-pressure water jet reaming is anti-reflection, hydraulic slotted liner technique is anti-reflection, deep-hole control presplit blasting is anti-reflection etc., and these methods are to a certain degree
On achieve good effect, but there is also some defects, major embodiment is both ways：One is the defect with technology sheet,
It is mainly shown as：Release antireflective effect continuation is poor, stress raisers, outburst hazard may be caused to increase and even induce punching
Hit-protrude compound dynamic disaster；Two be with coal seam adaptability problem, be mainly shown as：In the coal seam with gas in fold area
Due to prominent characteristics, irrigation measure such as gas bearing capacity is high, coal particle size is small, remaining mechanics low intensity, permeability are low, water sensitivity is strong
Especially fracturing effect is little, does not often reach expected antireflective effect.
Patent of invention-a kind of gas-liquid-solid three-phase coupling explosion reduction bump and anti-reflection method (CN 103161493
B), it is mainly to explosion is carried out after blast hole water filling again, common gas-particle two-phase explosion is changed into gas-liquid-solid three-phase explosion, profit
The effect such as underwater shock wave, jet and secondary pressure ripple is produced to strengthen demolition effect with by hydraulic pressure demolition, but the program is deposited
In coal seam, absorption speed is slow, and coal body elasticity can reduce insufficient, the water filling problem that time-consuming and quantities is big.Patent of invention-change
The method (B of CN 103061766) for learning reaction preventing and treating Bumping Pressure in Coal Layers injects coal body by configuring alkaline solution, using alkalescence
Organic matter in solution soluble solution coal, and then Burst Tendency is eliminated, but primarily directed to Ro,maxThe low order coal seam of ＜ 0.6%, fits
It is restricted with property.A kind of patent of invention-coalbed methane near-wellbore area chemical block removing method (B of CN 103541713) by
The coal seam section injection ethanol in proper amount of coal seam reservoirs near wellbore zone, is extracted and is extracted to coal, and the hole of coal seam reservoirs is improved so as to reach
The purpose of porosity and permeability, but the program is relatively costly and that coal is extracted and extracted using ethanol limited in one's ability.
The content of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of coal seam with gas multistage anti-reflection method, it is determined that coal seam is assigned
On the premise of depositing Regional Geological Conditions, the degree of metamorphism of coal, the species of coal and Gas explosion burns, according to coal seam whether in tomography,
Fold position, takes different schemes to realize that the one-level of coal seam with gas is anti-reflection and is tested to antireflective effect, if meeting predetermined
Effect, then carried out anti-reflection using the anti-reflection scheme of one-level to whole coal seam；If being unsatisfactory for desired effects, in the base that one-level is anti-reflection
On plinth, two-stage acidulation is carried out to coal seam with gas anti-reflection；The anti-reflection end of two-stage acidulation is treated, carrying out gas to coal seam with gas takes out
Adopt.To achieve the above object, adopt the following technical scheme that：
A kind of coal seam with gas multistage anti-reflection method, comprises the steps of：
A () determines ocurrence of coal seam Regional Geological Conditions, the degree of metamorphism of coal, the species of coal and Gas explosion burns；
B () is according to step (a), if coal seam is in tomography, fold position, using carbon dioxide explosion or the quick-fried realization of water under high pressure
The one-level of coal seam with gas is anti-reflection；Conversely, taking hydraulic fracturing to realize that the one-level of coal seam with gas is anti-reflection；
C () is tested according to step (b) effect anti-reflection to one-level, anti-reflection using one-level if meeting desired effects
Scheme whole coal seam is proceeded it is anti-reflection；If being unsatisfactory for desired effects, on the basis of one-level is anti-reflection, to coal containing methane gas
It is anti-reflection that body carries out two-stage acidulation；
D () treats the anti-reflection end of two-stage acidulation, gas pumping is carried out to coal seam with gas.
Further, fold described in step (b) is to oblique or anticline.
Further, tomography described in step (b) is reversed fault.
Further, effect anti-reflection to one-level described in step (c) is tested, and its specific method is：It is anti-reflection with one-level
The average gas pumping scale Q of single hole afterwards2It is foundation, if meeting Q2≥70Q1, Q1For it is not anti-reflection when the average gas pumping of single hole
Scale, unit is m3·min-1, then one-level antireflective effect is qualified；Otherwise take two-stage acidulation anti-reflection.
Further, the anti-reflection measure of two-stage acidulation described in step (c) is：The coal seam with gas injection matter anti-reflection to one-level
Amount fraction corresponds to hydrochloric acid, hydrofluoric acid, the mix acid liquor of acetic acid of 15%-20%, 2%-4%, 1%-2% respectively.
The present invention has the advantages that：
1. the permeability of coal seam with gas integrality and residing ambient stress correlation with itself is being taken into full account
On the premise of, with reference to the difference row of different preservation region coal seam with gas permeabilities, for tomography, the coal containing methane gas at fold position
Body takes different anti-reflection measures and antireflective effect is checked respectively from the coal seam with gas of non-tomography, fold position, and proposes
Two-stage acidulation is anti-reflection, and specific aim, purpose are strong, and antireflective effect is notable.
2. the multicomponent acid solution such as the anti-reflection use hydrochloric acid of two-stage acidulation, hydrofluoric acid and acetic acid, wherein using hydrochloric acid as master
Body acid, can effectively dissolve carbonate rock mineralogical composition and the sulfide in coal, and relatively low pH value is kept in coal seam, can press down
Ferric hydroxide precipitate generation processed；Hydrofluoric acid as a kind of auxiliary acid, for dissolving contained silicate rock class mineral in coal seam
Composition；Acetic acid belongs to weak acid and helps out as organic acid, can inhibition retarded acidizing ability, and then acidizing degree can be made most
Optimization, while acidifying belongs to exothermic reaction, is more beneficial for the desorption release of adsorption gas, and then increases gas permeability of coal seam, improves
Gas pumping rate.
3. the ore deposit that the contained main carbonate that can be reacted with acid solution and sulfide belong in the inorganic substances of coal in coal
Material class is harmful components and be major impurity in coal, one-level it is anti-reflection it is unconspicuous in the case of take two-stage acidulation anti-reflection,
The quality and value of coal are also improved while realizing anti-reflection, is a kind of behave for killing two birds with one stone.
4. carried out for different preservation regions coal seam with gas multistage anti-reflection, not only significantly increase the gas permeability in coal seam,
Gas pumping rate is improve, and is also had for the preventing and treating of the colliery such as bump-coal and gas prominent composite power disaster
Positive effect.
Brief description of the drawings
Fig. 1 is a kind of coal seam with gas multistage anti-reflection method flow chart of the invention.
Fig. 2 is the average gas pumping scale distribution histogram of multistage anti-reflection front and rear single hole in embodiment of the present invention scheme.
Specific embodiment
To fully demonstrate feature of the invention and advantage, described in detail below in conjunction with specific embodiment and accompanying drawing.
Research background：The working face of certain ore deposit C2 coal seams 11105, is exploited, using strike long wall method wherein being inclined to length
80m, strike length 600m, thickness 0.75-2.25m, average thickness 1.5m, 2 ° of seam inclination, coal bed texture is relatively simple, layer position compared with
Stable, neighbouring to be constructed without tomography, fold etc., area Nei Kecai belongs to compared with stable type coal seam.On away from the average 17.35m in C3 coal seams, under away from
The average 24.65m in C1 coal seams, Roof rock feature is that mud stone and Sandy Silt locally contain siltstone, and base plate lithology is with silty
Based on.The absolute gas pressure of on-site measurement is up to 1.95MPa, minimum 1.25MPa, and Direct Determination coal seam high methane content is most
Up to 21.4468m3/ t, belongs to typical coal and gas prominent type mine, and hard in coal seam, anthracite, degree of metamorphism is high, ature of coal compared with
It is good, permeability coefficient 0.012m2/(MPa2D), the typical coal seam of hard-pumped containing gas is belonged to.
As shown in figure 1, a kind of coal seam with gas multistage anti-reflection method, as follows comprising step：
Multiple drillings are opened up along coal seam with 30 ° of inclination angles in the tailentry of ore deposit 11105, wherein with a control hole
An anti-reflection unit is constituted with a pilot hole, 8 anti-reflection units, trend are equidistantly arranged in incline direction with 5m distances respectively
Direction arranges that 7 anti-reflection units, as an anti-reflection stage, 10 anti-reflection stages are divided into according to strike length altogether.
3 anti-reflection stages before working face are not taken any anti-reflection measure directly to carry out drilling gas and take out and obtain in advance by step 1
The average gas pumping scale Q of single hole when taking not anti-reflection1(0.0016m3·min-1)；3 anti-reflection stage realities last to working face
Apply hydraulic fracturing anti-reflection and obtain it is anti-reflection after the average gas pumping scale Q of single hole2；
Step 2, the average gas pumping scale Q of single hole when respectively will be not anti-reflection1(0.0016m3·min-1) and implement water
Force split it is anti-reflection after the average gas pumping scale Q of single hole2(0.104m3·min-1), find Q2=65Q1And it is unsatisfactory for Q2≥
70Q1；Accordingly, it would be desirable to it is anti-reflection to implement after-souring；
Step 3, on the basis of early stage hydraulic fracturing anti-reflection, corresponds to respectively by anti-reflection unit implantation quality fraction
The hydrochloric acid of 15%-20%, 2%-4%, 1%-2%, hydrofluoric acid, the mix acid liquor sealing of hole of acetic acid simultaneously keep setting time to be not less than
10 days；
Step 4, treats the anti-reflection end of two-stage acidulation, and gas pumping is carried out to coal seam with gas.
Wherein, the mix acid liquor of certain mass fraction is injected in step 3 to anti-reflection unit, operating process is as follows：
Scene takes coal sample, and the coal sample to fetching is processed makes it meet laboratory experiment requirement, using electron-microscope scanning, CT
Or nuclear magnetic resonance observes the microstructure of coal sample, can be with the carbon of acid reaction in finding out coal sample using X-ray diffraction and fluorescence spectrum
Carbonate Rocks, silicate rock and sulphidic species simultaneously determine content using standardization.Table 1 give it is contained in the present embodiment coal sample can
Carbonate rock, silicate rock and sulfide composition and the content reacted with acid solution.
Table 1
The mass fraction of the compound acid solution in suitable this coal seam, specific operation process are determined by coal dust corrosion rate determination experiment
It is as follows：Coal sample is ground to form the coal dust of 80 mesh, 4 parts of each 3g of coal dust are weighed with assay balance, precision is 0.001g；By coal dust and acid
Liquid is poured into glass cylinder by a certain percentage, and heating response is carried out in the water bath with thermostatic control platform for placing into 60 DEG C；Reaction reaches predetermined
After time 3h, graduated cylinder is taken out from water bath with thermostatic control platform, filtering is put into remaining coal dust and filter paper in drying box, until permanent
Weight；According to the mass change of coal dust before and after acidifying, corrosion rate of the different quality containing mix acid liquor to coal dust is calculated, determined
Suitable acid solution mass fraction.
Corrosion rate K calculation expressions are：
In formula, m1Quality of pc before-acidifying, g；m2Quality of pc after-acidifying, g；
Analyzed from table 1, contained silicate rock is more in the coal sample, when corrosion rate is determined, properly increase mixed acid
The ratio of HF in liquid, the final mix acid liquor for being adapted to this coal seam for determining to choose of experiment is 18%HCL+4%HF+2%
CH3COOH。
By step 3 two-stage acidulation it is anti-reflection after, before extraction, two-stage acidulation antireflective effect is done further inspection (figure
2) Q, now, is found2(0.152m3·min-1), Q2=95Q1Meet Q2≥70Q1, extraction system is accessed carries out gas pumping.
Although above-mentioned be described with reference to accompanying drawing to specific embodiment of the invention, not to present invention protection model
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need the various modifications made by paying creative work or deformation still within protection scope of the present invention.
Claims (5)
1. a kind of coal seam with gas multistage anti-reflection method, it is characterized in that, comprise the steps of：
A () determines ocurrence of coal seam Regional Geological Conditions, the degree of metamorphism of coal, the species of coal and Gas explosion burns；
B () is according to step (a), if coal seam is in tomography, fold position, using carbon dioxide explosion or water under high pressure it is quick-fried realize containing watt
The one-level of this coal body is anti-reflection；Conversely, taking hydraulic fracturing to realize that the one-level of coal seam with gas is anti-reflection；
C () is tested according to step (b) effect anti-reflection to one-level, if meeting desired effects, using the side that one-level is anti-reflection
Case proceeds anti-reflection to whole coal seam；If being unsatisfactory for desired effects, on the basis of one-level is anti-reflection, coal seam with gas is entered
Row two-stage acidulation is anti-reflection；
D () treats the anti-reflection end of two-stage acidulation, gas pumping is carried out to coal seam with gas.
2. a kind of coal seam with gas multistage anti-reflection method according to claim 1, it is characterized in that, pleat described in step (b)
Qu Weixiang tiltedly or anticline.
3. a kind of coal seam with gas multistage anti-reflection method according to claim 1, it is characterized in that, break described in step (b)
Layer is reversed fault.
4. a kind of coal seam with gas multistage anti-reflection method according to claim 1, it is characterized in that, to one-level in step (c)
The method that anti-reflection effect is tested is：With the average gas pumping scale Q of single hole of the one-level after anti-reflection2It is foundation, if meeting Q2
≥70Q1, Q1For it is not anti-reflection when the average gas pumping scale of single hole, unit is m3·min-1, then one-level antireflective effect is qualified；It is no
Then take two-stage acidulation anti-reflection.
5. a kind of coal seam with gas multistage anti-reflection method according to claim 1, it is characterized in that, two grades of acid in step (c)
Changing anti-reflection measure is：The coal seam with gas implantation quality fraction anti-reflection to one-level correspond to respectively 15%-20%, 2%-4%,
The hydrochloric acid of 1%-2%, hydrofluoric acid, the mix acid liquor of acetic acid.
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| CN109372572A (en) * | 2018-12-20 | 2019-02-22 | 华北科技学院 | A kind of efficient pumping method of low-permeability coal-bed gas |
| CN109555502A (en) * | 2018-11-13 | 2019-04-02 | 山西潞安环保能源开发股份有限公司常村煤矿 | A kind of antireflective type approval test method of high methane coal road presplitting |
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| CN108166953A (en) * | 2017-12-27 | 2018-06-15 | 武汉理工大学 | Jet stream slot and CO2Acid fracturing explosion connection makees coal rock dynamic disaster control method |
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| CN106437824A (en) | 2017-02-22 |
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