CN103982137B - Design method for underground hydraulic fracturing drilled hole azimuth angle of coal mine - Google Patents
Design method for underground hydraulic fracturing drilled hole azimuth angle of coal mine Download PDFInfo
- Publication number
- CN103982137B CN103982137B CN201410210972.3A CN201410210972A CN103982137B CN 103982137 B CN103982137 B CN 103982137B CN 201410210972 A CN201410210972 A CN 201410210972A CN 103982137 B CN103982137 B CN 103982137B
- Authority
- CN
- China
- Prior art keywords
- drilled hole
- angle
- ground stress
- hydraulic fracturing
- boring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003245 coal Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000013461 design Methods 0.000 title abstract description 12
- 238000010276 construction Methods 0.000 claims abstract description 10
- 230000001154 acute effect Effects 0.000 claims description 5
- 241001236093 Bulbophyllum maximum Species 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- 238000005553 drilling Methods 0.000 abstract description 5
- 201000004569 Blindness Diseases 0.000 abstract description 4
- 238000005065 mining Methods 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000005086 pumping Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 230000003667 anti-reflective effect Effects 0.000 description 2
- 238000011160 research Methods 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
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000001028 reflection method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Lining And Supports For Tunnels (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
A design method for an underground hydraulic fracturing drilled hole azimuth angle of a coal mine comprises the steps that according to the existing coal bed geological data, determining the sizes of the vertical ground stress, the maximum horizontal ground stress and the minimal horizontal ground stress as well as the direction of the maximal horizontal ground stress of a coal bed in a mining area; if the vertical ground stress in the three ground stress is the largest, drilling performing vertical laneway side wall construction on a drilled hole; if the vertical ground stress is smaller than the maximal horizontal ground stress, determining the included angel alpha between the drilled hole and the laneway according to the included angle theta between the maximal horizontal ground stress and the laneway and finally determining the azimuth angle of the drilled hole by the included angel alpha and a laneway azimuth angle beta. A reasonable hydraulic fracturing drilled hole azimuth angle is designed by using the ground stress, the design blindness of hydraulic fracturing drilled hole parameters is avoided, a basis can be provided for the design of the hydraulic fracturing drilled hole azimuth angle, the designed drilled hole arrangement is favorable for the development and expansion of fractures among the hydraulic fracturing drilled hole holes, the breathability of the coal bed is increased, the influencing range of the hydraulic fracturing drilled hole is expanded and the gas extraction effect is improved.
Description
Technical field
The present invention relates to underground coal mine regional gas control technical field, be specifically related to a kind of underground coal mine fracturing bore direction
Angle method for designing.
Background technology
Along with coal in China produce high-efficiency intensifying and the increase of mining depth, gas emission is increasing, gas explosion and
The threat of Gas Outburst danger is increasingly severe.The major measure solving the gas problem during seam mining is to implement coal in advance
Layer gas pumping, and for high gassy and low permeability coal seam, the conventional effective coverage of drilling gas pumping method is little, extraction
Weak effect, needs to take anti-reflection method.Hydraulic fracturing technology is the major measure of oil output, underground coal mine application also
Achieve certain effect.Utilize hydraulic fracturing technology coal body can be carried out release anti-reflection, increase boring coverage, improve
Coal body breathability.
Along with in the application of underground coal mine and popularization, hydraulic fracturing technology each side technique gradually improves.But, as carrying
The measure of high hole pumping and mining effect, the research for fracturing boring is relatively fewer, and the design parameter of fracturing boring such as inclines
Angle, azimuth, hole depth etc. do not have unified specification, and the selection of parameter exists certain blindness, especially bore direction angle,
Big more options are perpendicular to the construction of lane side, and the effect that fracturing release is anti-reflection is restricted.When coal body implements fracturing, boring
Crack around is grown under hydraulic pressure, is extended, and research shows, the direction that fracturing crack propagation extends and coal body should sufferedly
Power size and Orientation is relevant, and i.e. crack is always along vertical and the Directional Extension of minimum stress.And crack propagation during fracturing
Ideal orientation is the direction cranny development extension between boring and boring, and then links up formation fracture network, forms region release anti-reflection.
Under the size and Orientation premise taking into full account crustal stress, by selecting suitable fracturing bore direction angle so that waterpower pressure
The technology of splitting release is anti-reflection in preset range and direction effect can reach optimal, improves gas pumping effect.
Summary of the invention
Technical problem: it is an object of the invention to have problems in prior art, it is provided that the operation simple, easy of a kind of method, energy
Effectively strengthen fracturing release antireflective effect, the underground coal mine fracturing bore direction angle design side of raising gas pumping effect
Method.
Technical scheme: the underground coal mine fracturing bore direction angle method for designing of the present invention, comprises the following steps:
A. according to coal geology information, boring coal seam, place vertically stress σ is determinedV, maximum horizontal crustal stress σH, minimum water
Flat principal stress σhSize, and determine tunnel azimuthal angle beta and maximum horizontal principal stress σHAzimuth γ；
B. maximum horizontal principal stress σ is calculated by the azimuth γ of tunnel azimuthal angle beta and maximum principal stressHAngle theta with tunnel
=| β-γ |, as θ > 90 ° time, θ is changed into acute angle；
C. the angle α of boring and tunnel is determined；
If vertically stress σVMore than maximum horizontal crustal stress σHTime, then boring and angle α=90 ° in tunnel；
If vertically stress σVLess than maximum horizontal crustal stress σHTime,
When maximum horizontal principal stress σHAngle theta≤45 in direction and tunnel°, boring (3) and the angle α in tunnel (4)
In the range of 90 ° of-θ≤α≤90 °+θ, directly help construction drill in lane；
When 45 ° of ＜ θ≤90 °, the angle α in boring (3) and tunnel (4), in the range of α≤90-θ, arranges drill site (5),
Construction drill in drill site (5)；
The most finally determine that boring (3) azimuth is alpha+beta.
Beneficial effect: when the present invention is directed to the application of underground coal mine hydraulic fracturing technology, drilling parameter design exists certain blindness, especially
It is the selection at bore direction angle, does not take into full account the impact that fracturing crack propagation is extended by the distribution of coal seam crustal stress,
Propose a kind of underground coal mine fracturing brill that fracturing release antireflective effect, offer gas pumping effect can be effectively provided
Azimuth, hole method for designing.Utilize the fracturing bore direction angle that crustal stress is reasonable in design, it is to avoid fracturing boring ginseng
The blindness of number design, improves the science of fracturing drilling design.The fracturing boring arranged by the present invention can profit
The impact extended fracturing crack propagation with coal body crustal stress size and Orientation, promotes that crack is expanded in predetermined direction and scope
Exhibition, forms the anti-reflection region of target release.By the enforcement of the present invention, the anti-reflection scope of fracturing release can be expanded, increase coal
Body breathability, improves gas pumping effect.Its method is simple, and implementation result is good, has wide applicability.
Accompanying drawing explanation
Fig. 1 be fracturing boring directly act on lane side construction bore time, azimuth design working drawing (θ≤45 °).
Fig. 2 is in fracturing boring drill site when drilling, azimuth design working drawing (45 ° of ＜ θ≤90 °).
In figure: 1 maximum horizontal crustal stress σH, 2 minimum level crustal stress σh, 3 fracturing borings, 4 tunnels,
5 drill sites.
Detailed description of the invention:
Below in conjunction with the accompanying drawings embodiments of the invention are further described:
Embodiment 1 as it is shown in figure 1, by directly act on lane side construction drill as a example by.Its underground coal mine fracturing boring cloth
The step putting method is as follows:
A. test crustal stress method is utilized to record fracturing boring (3) place work surface coal seam vertically stress σV, flood
Level land stress σH(1), minimum horizontal principal stress σh(2) size；
B. combine coal geology data, the azimuth γ of tunnel azimuthal angle beta and maximum principal stress calculate maximum horizontal principal stress
σH(1) with angle theta=| the β-γ | in tunnel (4), as θ > 90 ° time, by the method for geometry between angle, θ is changed into
Acute angle.Such as angle theta=135 °, then change into-90 °, acute angle theta=135 °=45 ° by the geometrical relationship between angle, for another example
θ=234 ° then change into-180 °, acute angle theta=234 °=54 ° by the geometrical relationship between angle；
If the most vertically stress σVMore than maximum horizontal crustal stress σH(1), prolong due to the extension in fracturing boring crack around
Stretching and have certain randomness, it is the longest that boring is perpendicular to effective sealed borehole length of boring during the side of lane, so selecting boring to be perpendicular to lane
Constructing in road, i.e. fracturing boring (3) and tunnel (4) angle α are 90 °；
If vertically stress σVLess than maximum horizontal crustal stress σH(1), then boring (3) and lane are determined according to the size of angle theta
The angle α in road (4): when maximum horizontal crustal stress and tunnel (4) angle theta≤45 °, uses lane side directly to drill method,
Boring (3) is 90-θ≤α≤90+ θ with the optional scope of tunnel (4) angle α；
D. according to angle α and the azimuthal angle beta in tunnel (4) in boring (3) and tunnel (4), boring (3) azimuth is determined
For alpha+beta.
Embodiment 2 is as in figure 2 it is shown, by as a example by drill site construction drill.The step of its fracturing bore direction angle method for arranging
The most substantially the same manner as Example 1, identical part is slightly.Difference is:
When maximum horizontal crustal stress and 45 ° of ＜ θ≤90 ° of tunnels included angle, boring (3) and the optional scope of tunnel (4) angle
For α≤90-θ.
Example 1 is holed (3) directly act on lane side (4) advantage constructed and be to need not drill site of constructing, decrease engineering
Amount, shortcoming is that, when hole (3) are too small with tunnel (4) angle, the effective length of boring (3) sealing of hole can not be guaranteed,
If sealed borehole length is inadequate, lane side easily leaks release.Therefore, when hole (3) are too small with tunnel (4) angle, preferably select
Drill in drill site (5) construction.
Claims (1)
1. a underground coal mine fracturing bore direction angle method for designing, it is characterised in that comprise the following steps:
A. according to coal geology information, boring (3) coal seam, place vertically stress σ is determinedV, maximum horizontal principal stress σH(1), minimum horizontal principal stress σh(2) size, and determine tunnel azimuthal angle beta and maximum horizontal principal stress σH(1) azimuth γ；
B. maximum horizontal principal stress σ is calculated by the azimuth γ of tunnel azimuthal angle beta and maximum principal stressH(1) with angle theta=| the β-γ | in tunnel (4), as θ > 90 ° time, θ is changed into acute angle；
C. the angle α of boring (3) and tunnel (4) is determined；
If vertically stress σVMore than maximum horizontal principal stress σH(1) time, then boring (3) and angle α=90 ° in tunnel (4)；
If vertically stress σVLess than maximum horizontal principal stress σH(1) time,
When maximum horizontal principal stress σH(1) direction and angle theta≤45 ° in tunnel (4), the angle α in boring (3) and tunnel (4), in the range of 90 ° of-θ≤α≤90 °+θ, directly helps construction drill in lane；
When 45 ° of ＜ θ≤90 °, the angle α in boring (3) and tunnel (4), in the range of α≤90-θ, arranges drill site (5), construction drill in drill site (5)；
The most finally determine that boring (3) azimuth is alpha+beta.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410210972.3A CN103982137B (en) | 2014-05-19 | 2014-05-19 | Design method for underground hydraulic fracturing drilled hole azimuth angle of coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410210972.3A CN103982137B (en) | 2014-05-19 | 2014-05-19 | Design method for underground hydraulic fracturing drilled hole azimuth angle of coal mine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103982137A CN103982137A (en) | 2014-08-13 |
| CN103982137B true CN103982137B (en) | 2017-01-11 |
Family
ID=51274283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410210972.3A Active CN103982137B (en) | 2014-05-19 | 2014-05-19 | Design method for underground hydraulic fracturing drilled hole azimuth angle of coal mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103982137B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105888686B (en) * | 2016-05-17 | 2018-04-06 | 陕西正通煤业有限责任公司 | A kind of pressure relief method for meeting pick and unloading parallel operations |
| CN106761754A (en) * | 2017-03-31 | 2017-05-31 | 中国矿业大学 | A kind of girdle comprehensive mining and gas control network one cooperative control system and method |
| CN107905832A (en) * | 2017-11-06 | 2018-04-13 | 北京九尊能源技术股份有限公司 | The outburst elimination method of pump drainage is combined on a kind of nitrogen pressure break and ground with underground |
| CN108361011B (en) * | 2018-03-08 | 2020-06-23 | 河南理工大学 | Method for controlling mining influence range from underground roadway directional hydraulic fracturing |
| CN112554953A (en) * | 2020-12-18 | 2021-03-26 | 山东科技大学 | Method for judging impact risk of syncline shaft stope by window intervention method |
| CN115493737B (en) * | 2022-08-17 | 2024-05-31 | 中煤科工西安研究院(集团)有限公司 | Original rock stress determination method based on downhole directional long-borehole hydraulic fracturing method |
| CN115288606A (en) * | 2022-08-22 | 2022-11-04 | 华亭煤业集团有限责任公司 | Large-diameter drilling pressure relief method based on stress environment |
| CN115949388B (en) * | 2023-02-20 | 2024-05-07 | 四川轻化工大学 | Sleeve anti-collision ranging early warning method and measuring unit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2108437C1 (en) * | 1996-08-02 | 1998-04-10 | Закрытое акционерное общество "НТ-Курс" | Device for deviation of bottom-hole motor components |
| RU2144604C1 (en) * | 1998-05-15 | 2000-01-20 | Товарищество с ограниченной ответственностью - Научно-производственная фирма "Геобур" | Method for control of whipstock in drilling well by unit with bottom-hole motor |
| CN101403314A (en) * | 2008-11-18 | 2009-04-08 | 河南理工大学 | Coal mine down-hole drilling hydraulic fracturing anti-reflection mash gas extraction technique |
| CN102071921A (en) * | 2010-12-30 | 2011-05-25 | 河南理工大学 | Underground drilling and fracturing-integrated staged fracturing device and gas drainage process |
| CN102337919A (en) * | 2011-09-01 | 2012-02-01 | 河南理工大学 | Four-period-five-purpose hole-drilling high-efficiency gas extracting process |
| CN102352769A (en) * | 2011-10-21 | 2012-02-15 | 河南煤业化工集团研究院有限责任公司 | Integrated mining method for commonly mining coal and gas of high mine |
| CN103953343A (en) * | 2014-04-03 | 2014-07-30 | 太原理工大学 | Method for controlling roof caving under condition of hardroof in coal seam |
-
2014
- 2014-05-19 CN CN201410210972.3A patent/CN103982137B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2108437C1 (en) * | 1996-08-02 | 1998-04-10 | Закрытое акционерное общество "НТ-Курс" | Device for deviation of bottom-hole motor components |
| RU2144604C1 (en) * | 1998-05-15 | 2000-01-20 | Товарищество с ограниченной ответственностью - Научно-производственная фирма "Геобур" | Method for control of whipstock in drilling well by unit with bottom-hole motor |
| CN101403314A (en) * | 2008-11-18 | 2009-04-08 | 河南理工大学 | Coal mine down-hole drilling hydraulic fracturing anti-reflection mash gas extraction technique |
| CN102071921A (en) * | 2010-12-30 | 2011-05-25 | 河南理工大学 | Underground drilling and fracturing-integrated staged fracturing device and gas drainage process |
| CN102337919A (en) * | 2011-09-01 | 2012-02-01 | 河南理工大学 | Four-period-five-purpose hole-drilling high-efficiency gas extracting process |
| CN102352769A (en) * | 2011-10-21 | 2012-02-15 | 河南煤业化工集团研究院有限责任公司 | Integrated mining method for commonly mining coal and gas of high mine |
| CN103953343A (en) * | 2014-04-03 | 2014-07-30 | 太原理工大学 | Method for controlling roof caving under condition of hardroof in coal seam |
Non-Patent Citations (1)
| Title |
|---|
| 特厚煤层高强度综放开采水力压裂顶板控制技术研究;于斌;《岩石力学与工程学报》;20140415;778-785 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103982137A (en) | 2014-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103982137B (en) | Design method for underground hydraulic fracturing drilled hole azimuth angle of coal mine | |
| CN103953343B (en) | A kind of method coal seam tight roof being controlled to caving | |
| CN101915083B (en) | Method for extracting coalbed gases from coal mines by upper and lower combination | |
| CN101338999B (en) | Method for blasting seepage enhancement for low infiltration sandrock -type uranium deposit | |
| CN102080518B (en) | Method for extracting gas from coal seam roof complex branched well | |
| CN103924975B (en) | A kind of for the water-retaining method in coal mining process | |
| CN102392678A (en) | Gas drainage method combining surface and underground fracturing and permeability improvement | |
| CN106050234B (en) | The construction technology that underground water is protected in progress of coal mining | |
| CN106869966B (en) | A kind of method for blocking of absciss layer water supply source | |
| CN102678092B (en) | A kind ofly abovegroundly combine construction coal and the coal bed gas method of adopting altogether down | |
| CN102392677A (en) | Permeability improvement technology for coal bed gas reservoir cap by using three-dimensional fracture network modification | |
| CN107740707A (en) | Thick coal-layer mining water damage prevention and controls under a kind of deep high artesian | |
| CN108571307A (en) | A kind of enhanced geothermal system pressure-break net design and completion method | |
| CN108151596A (en) | Diversion Tunnel Blasting Excavation out break controls construction method | |
| CN108301866B (en) | Mining of closed distance coal seam group adjacent layer gas pressure relief directional drilling stops pumping method | |
| CN104763398A (en) | Mining method for deformed coal coalbed methane for V-shaped well bottom plate auxiliary layer | |
| CN113404534B (en) | Method for preventing rock burst by staged fracturing of L-shaped ground horizontal well | |
| CN102777180A (en) | Method for actively and regionally preventing and controlling rock burst in coal mines | |
| CN102536240A (en) | Method for preventing rock burst by adopting high-pressure fracturing | |
| CN104329113A (en) | Gas drainage method by pressure relief of coal bed bottom plate through ground drilling and loosening blasting | |
| CN108843343A (en) | A kind of coal mine waits for covering the grouting method of burnt rock water seal curtain on mining face | |
| CN110173238A (en) | The anti-reflection extraction of high seam three-dimensional roadway layout networking explosion thick gas method entirely | |
| CN102121364A (en) | Well structure of pressure-releasing coal bed gas ground extraction well and arrangement method thereof | |
| CN102678166A (en) | Method for increasing gas extraction rate by permeability increasing of single thick coal seam | |
| CN105443133A (en) | Underground rock cumulative charge explosion device and method for non-excavation construction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 221116 Research Institute of China University of Mining and Technology,, Jiangsu Applicant after: China University of Mining & Technology Address before: 221116 Research Institute, China University of Mining and Technology, Xuzhou University, Jiangsu, China, Applicant before: China University of Mining & Technology |
|
| COR | Change of bibliographic data | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |