CN105114117A - Gas drainage method based on expansion material - Google Patents
Gas drainage method based on expansion material Download PDFInfo
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- CN105114117A CN105114117A CN201510486199.8A CN201510486199A CN105114117A CN 105114117 A CN105114117 A CN 105114117A CN 201510486199 A CN201510486199 A CN 201510486199A CN 105114117 A CN105114117 A CN 105114117A
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- expanding material
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- coal
- gas pumping
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- 239000000463 material Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000003245 coal Substances 0.000 claims abstract description 63
- 238000005553 drilling Methods 0.000 claims abstract description 17
- 230000003068 static effect Effects 0.000 claims abstract description 10
- 238000011049 filling Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000005086 pumping Methods 0.000 claims description 31
- 238000000605 extraction Methods 0.000 claims description 30
- 230000035699 permeability Effects 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 4
- 238000013467 fragmentation Methods 0.000 claims description 4
- 238000006062 fragmentation reaction Methods 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000003818 cinder Substances 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims description 2
- 239000003566 sealing material Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 44
- 239000003795 chemical substances by application Substances 0.000 abstract description 15
- 238000005065 mining Methods 0.000 abstract description 4
- 239000000428 dust Substances 0.000 abstract description 3
- 239000002341 toxic gas Substances 0.000 abstract description 3
- 239000002893 slag Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000002002 slurry Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 206010053615 Thermal burn Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000008521 reorganization Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 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)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a gas drainage method based on an expansion material. The gas drainage method includes: drilling holes in a coal bed in a coal-mining working face, using the expansion material to fracture the coal bed, and performing gas drainage through drainage drilling holes; forming expansion drilling holes and the drainage drilling holes in the coal bed according to degree of freedom and hardness of the coal bed; matching according to different coal bed temperatures and characteristic requirements of the expansion material; using high-pressure air to blow-wash residual coal slag and water in the coal bed drilling holes, and filling the expansion drilling holes according to a certain proportion interval; after the coal bed is fractured by an expansion agent, draining gas through the expansion drilling holes. The expansion material is used for static fracturing of the coal bed, so that the gas drainage method has the advantages of high safety, easiness in operation and low cost, and is free of vibration, noise, dust and toxic gas in the process of expansion, suitable for gas drainage of various coal mines and especially suitable for treatment of gas drainage of low-permeability coal mines.
Description
Technical field
The present invention relates to a kind of gas pumping technology, particularly relate to a kind of gas pumping method based on expanding material.
Background technology
Coal and gas prominent is one of major reason causing coal production process accident.Along with the extension of coal mining level, geostatic stress increases, and gas pressure raises, and causes regional area methane accumulation, and coal and gas prominent danger is also more and more serious, and gas preventing and control difficulty is also increasing.Gas is taken out, arrange one of technical measures that (gas pumping and gas pumping) is control gas, but for low air permeability coal seam, gas is taken out, it is poor to arrange effect, does not reach the object of gas control.Though China's coal mines gas pumping technology grows a lot, but because China's coal-mine exploitation coal mining output is large, the producing coal amount with gas drainage system mine only accounts for 15.1% of coal mining total output, mash gas extraction amount only accounts for 10.2% of exploitation mine gas emission rate, therefore mash gas extraction work should be strengthened further, and there is the problem that engineering quantity is large, the activity duration is long, technical requirements is high, and often bring potential safety hazard in coal-face operation.
Summary of the invention
The object of this invention is to provide a kind of gas pumping method based on expanding material, the gas gathered in the extraction coal seam that the method can be effective, safe.
The present invention is achieved by the following technical solutions:
The method of gas pumping in coal seam of the present invention, comprises and holing to the coal seam in coal-face, uses expanding material to carry out coal bed fracturing, then carries out gas pumping by extraction borehole.
Described expanding material is to the step of coal bed fracturing gas pumping:
A, drilling stage: according to degree of freedom and the hardness in coal seam, expand boring and extraction borehole are arranged in coal seam, and described boring aperture is 25-100mm, and hole depth is 50-180m, and the spacing between boring is 2-10m;
B, preparation stage: when selecting expanding material, characteristic requirements according to different coal seam temperature and expanding material carries out proportioning, and the water/binder ratio of preparation expansion agent is 0.2-0.35, and the gradient according to boring carries out proportioning, first for expanding material paper using is packaged into cylindric, after immersion, inserts boring;
C, filling perforation stage: should to ensure in drilling hole before filling expansion agent and hole other clean, the remaining cinder in coal bed drilling and water applying high voltage air blowing clean.Expansion agent spacing press-in is by a certain percentage expanded in boring, and blocks up rapidly with sealing material, by coal bed fracturing after expanding material reaction;
D, extraction stage: expanding material is by after coal bed fracturing, and gas permeability of coal seam increases, and carries out extraction by extraction borehole, and gas density reduces.
As seen from the above technical solution provided by the invention, the method of the gas pumping based on expanding material of the present invention, owing to using expanding material, static pressure break is carried out to coal seam, there is safety high, easy to operate, the feature that cost is low, can not shake in expansion process, noise, dust and toxic gas.Be applicable to the gas pumping in various colliery, be particularly useful for the process of the gas pumping of low permeability mine.
Accompanying drawing explanation
Fig. 1 is that of the present invention boring in working face of coal seam arranges schematic diagram;
Fig. 2 is that the present invention is expanded drill expansion material filling schematic diagram.
Detailed description of the invention
The detailed description of the invention of the gas pumping method based on expanding material of the present invention is, comprise and holed in the coal seam in coal-face, inject expansion agent in expansion boring and static pressure break is carried out to coal seam, increase gas permeability of coal seam, then carry out gas pumping by extraction borehole.
When carrying out static pressure break with expanding material to rock stratum, first according to the scope of freedom and the hardness in coal seam, expand boring and extraction borehole are arranged in coal seam;
Then select expanding material, and prepare according to the characteristic requirements of expanding material;
Afterwards the expanding material prepared is poured into boring of expanding, after expanding material reaction, coal seam is broken;
Coal seam is by after pressure break, and gas can carry out gas pumping by extraction borehole and negative pressure equipment.
Specifically when arranging expansion boring and extraction borehole, preferably follow following principle:
When constructing, high, the broken bore dia of environment temperature is large, water/binder ratio is little, pitch-row hour for general expanding material, and cracking time is fast, effect is large; Otherwise cracking time is slow, effect is little.Therefore, pitch-row and the aperture in cloth hole will be considered according to field condition and construction cost etc.
Concrete enforcement, as shown in Figure 1, horizontal expansion boring and extraction borehole are arranged perpendicular to work plane in coal seam, and one or more powder charge hole, interval just retains an emptying aperture and does not fill static breaking agent, does not fill the emptying aperture of static breaking agent so just as extraction borehole.The method of this powder charge can adopt the mode that inwardly order is broken from both sides, coal seam, also can adopt the mode of primary fragmentation.
During boring, expanding boring should be suitably intensive compared with the extraction borehole at middle part, to guarantee that periphery medium is first broken.
Expansion bore diameter can scope between 25-100mm.Be 60mm by preferably the expand optimum aperture of drilling hole of coal seam actual conditions.
The hole depth of expansion boring is preferably between 50-180m, and carrying out preferred chi optimum according to coal seam thickness and methane accumulation degree etc. is 50-100m.
The spacing expanded between boring and extraction borehole is preferably 2-10m, and according to seam hardness preferred size, optimal size is 4-6m, arranges extraction borehole, thus carry out gas pumping while layout expands boring.
When selecting expanding material, according to different seasons and temperature, applicable expanding material to be selected; When preparing expansion agent, the gradient according to broken hole selects proportioning: the water/binder ratio of preparation expansion agent is generally 0.2-0.35.
As shown in Figure 2, should to ensure in drilling hole before filling expansion agent and hole other clean, the remaining cinder in coal bed drilling and water applying high voltage air blowing clean.Use extruding or grout pump by expansion agent press-in hole, also can first for static breaking agent paper using is packaged into cylindric, after immersion, insert boring of expanding.Different proportional spacing fillings is adopted to different expansions boring, thus ensures fracturing effect and make full use of expanding material.
According to the principle of expanding material, first coal seam can be tested targetedly in Practical Project, experimentally result adjustment construction parameter.
Should also be noted that in construction:
Expanding material belongs to alkaline, and have mild corrosion to skin, operating personnel Wear goggles and emgloves, fills boring until crackle please don't be looked at straight facing to aperture before occurring, in case sporadic punching phenomenon injury eyes; Slurry after stirring should in 5 minutes filling perforation complete; Find in stirring that slurry heats up rapidly and scalds one's hand to become dry, slurry should be poured on that underground gives up need not; The static breaking agent of different model can not be used with, forbids to blend other chemicals; Strict protection against the tide, should be finished after unpacking as far as possible.
It is high that the present invention has safety, easy to operate, the feature that cost is low, can not shake, noise, dust and toxic gas in expansion process.Be applicable to the gas pumping in various colliery, be particularly useful for the process of the gas pumping of low permeability mine.The bulbs of pressure are large, maximumly reach 100MPa.Be applicable to the fragmentation in various coal seam.
Expansion agent belongs to the expanded gel material of cement class, with water generation hydration reaction, form the crystallization of solid volume multiplication, thus compression pressure is produced to coal bed drilling, when the tension stress of compressive stress, vertical direction has exceeded the tensile strength of coal body, broken body generation has just been made to chap.
Expansion agent is a kind of Novel crushing construction technology that development in recent years is got up, because it can in friction, without slungshot, broken or cutting rock stratum or concrete structures under noiselessness, free of contamination condition, pole is suitable for the reorganization and expansion of the removal of all kinds of reinforced concrete foundation, building in urban construction and bridge, harbour, road, culvert.Thus have vast potential for future development, static crushing technology is successfully applied on ground, but does not also have the precedent of application in coal bed gas extraction.Expanding material is applied in the safety in production in colliery by the present invention just.
The above; be only the present invention's preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in technical scope of the present invention; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.
Claims (9)
1. based on a gas pumping method for expanding material, it is characterized in that, comprise and extraction is carried out to the gas gathered in low permeability coal seam, inject expanding material in expansion boring and static pressure break is carried out to coal seam, then carry out gas pumping by extraction borehole; The step of expanding material to coal bed fracturing gas pumping is utilized to comprise:
A, drilling stage: according to degree of freedom and the hardness in coal seam, expand boring and extraction borehole are arranged in coal seam;
The preparation of b, expanding material: when selecting expanding material, the characteristic requirements according to different coal seam temperature and expanding material carries out proportioning:
C, filling perforation stage: expanding material spacing press-in is by a certain percentage expanded in boring, and blocks up rapidly with sealing material, by coal bed fracturing after expanding material reaction;
D, extraction stage: expanding material is by after coal bed fracturing, and gas permeability of coal seam increases, and carries out extraction by extraction borehole, and gas density reduces.
2. the gas pumping method based on expanding material according to claim 1, it is characterized in that, horizontal expansion boring and extraction borehole are arranged perpendicular to work plane in coal seam, one or more powder charge hole, interval just retains an emptying aperture and does not fill expanding material, the emptying aperture not filling expanding material like this, just as extraction borehole, adopts the mode of the inwardly order fragmentation from both sides, coal seam or adopts the mode of primary fragmentation.
3. the gas pumping method based on expanding material according to claim 1 and 2, is characterized in that, during boring, boring of expanding is more intensive than the extraction borehole at middle part, to guarantee that periphery medium is first broken.
4. the gas pumping method based on expanding material according to claim 1 and 2, is characterized in that, described expansion boring aperture is 25-100mm.
5. the gas pumping method based on expanding material according to claim 1 and 2, is characterized in that, the hole depth of described expansion boring is 50-180m.
6. the gas pumping method based on expanding material according to claim 1 and 2, is characterized in that, the spacing 2-10m between described expansion boring and extraction borehole.
7. according to the gas pumping method based on expanding material according to claim 2, it is characterized in that, when selecting expanding material, according to the temperature of different seasons and rock stratum, select suitable expanding material;
When expanding material is prepared, select the denseness of proportioning according to the gradient of boring:
The water/binder ratio of preparation expanding material is 0.2 ~ 0.35, is packaged into cylindric, inserts boring after immersion by first for expanding material paper using.
8., according to the gas pumping method based on expanding material that claim 7 is stated, it is characterized in that, should to ensure in drilling hole before filling expanding material and hole other clean, the remaining cinder in coal bed drilling and water applying high voltage air blowing are in only; Use extruding or grout pump by expanding material press-in hole.
9. according to the gas pumping method based on expanding material according to claim 8, it is characterized in that, by gas pumping equipment, extraction is carried out to extraction borehole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510486199.8A CN105114117A (en) | 2015-08-10 | 2015-08-10 | Gas drainage method based on expansion material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510486199.8A CN105114117A (en) | 2015-08-10 | 2015-08-10 | Gas drainage method based on expansion material |
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| CN105114117A true CN105114117A (en) | 2015-12-02 |
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| CN201510486199.8A Pending CN105114117A (en) | 2015-08-10 | 2015-08-10 | Gas drainage method based on expansion material |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089174A (en) * | 2016-06-30 | 2016-11-09 | 太原理工大学 | The method in hydrofracturing chemically expansible agent filling speedy drivage tunnel |
| CN106223923A (en) * | 2016-10-17 | 2016-12-14 | 平安煤炭开采工程技术研究院有限责任公司 | Coal bed fracturing method |
| CN108825296A (en) * | 2018-07-19 | 2018-11-16 | 河南理工大学 | A kind of static anti-reflection heating promotion gas pumping method of solid matter |
| CN110242346A (en) * | 2019-06-26 | 2019-09-17 | 肥城白庄煤矿有限公司 | For coal seam tomography apparatus, the gas drainage under suction device and method of gas drainage under suction can be parsed |
| CN110259503A (en) * | 2019-06-14 | 2019-09-20 | 华北理工大学 | A kind of expansion rock stratum high position horizontal bore gas pumping method |
| CN110821550A (en) * | 2019-10-09 | 2020-02-21 | 山西潞安环保能源开发股份有限公司 | Coal roadway gas drainage method |
| CN114645700A (en) * | 2022-04-20 | 2022-06-21 | 中国矿业大学 | Method for filling high-pressure water-induced fractured rock mass with strong plastic material |
| CN114837647A (en) * | 2022-06-09 | 2022-08-02 | 华北理工大学 | Portable coal seam drilling expansion fracturing permeability-increasing device and method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089174A (en) * | 2016-06-30 | 2016-11-09 | 太原理工大学 | The method in hydrofracturing chemically expansible agent filling speedy drivage tunnel |
| CN106089174B (en) * | 2016-06-30 | 2019-05-14 | 太原理工大学 | The method in hydrofracturing chemically expansible agent filling speedy drivage tunnel |
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| CN106223923B (en) * | 2016-10-17 | 2019-03-19 | 平安煤炭开采工程技术研究院有限责任公司 | Coal bed fracturing method |
| CN108825296A (en) * | 2018-07-19 | 2018-11-16 | 河南理工大学 | A kind of static anti-reflection heating promotion gas pumping method of solid matter |
| CN110259503A (en) * | 2019-06-14 | 2019-09-20 | 华北理工大学 | A kind of expansion rock stratum high position horizontal bore gas pumping method |
| CN110242346A (en) * | 2019-06-26 | 2019-09-17 | 肥城白庄煤矿有限公司 | For coal seam tomography apparatus, the gas drainage under suction device and method of gas drainage under suction can be parsed |
| CN110821550A (en) * | 2019-10-09 | 2020-02-21 | 山西潞安环保能源开发股份有限公司 | Coal roadway gas drainage method |
| CN114645700A (en) * | 2022-04-20 | 2022-06-21 | 中国矿业大学 | Method for filling high-pressure water-induced fractured rock mass with strong plastic material |
| CN114837647A (en) * | 2022-06-09 | 2022-08-02 | 华北理工大学 | Portable coal seam drilling expansion fracturing permeability-increasing device and method |
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