CN108361011A - The method for controlling Affected areas by mining from underworkings orientation hydraulic fracturing - Google Patents
The method for controlling Affected areas by mining from underworkings orientation hydraulic fracturing Download PDFInfo
- Publication number
- CN108361011A CN108361011A CN201810191325.0A CN201810191325A CN108361011A CN 108361011 A CN108361011 A CN 108361011A CN 201810191325 A CN201810191325 A CN 201810191325A CN 108361011 A CN108361011 A CN 108361011A
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- CN
- China
- Prior art keywords
- overlying rock
- presplitting
- mining
- rock
- hydraulic fracturing
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- 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.)
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- 238000005065 mining Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000011435 rock Substances 0.000 claims abstract description 55
- 238000010276 construction Methods 0.000 claims abstract description 13
- 238000005553 drilling Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 239000003245 coal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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)
- Remote Sensing (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The present invention relates to a kind of methods controlling Affected areas by mining from underworkings orientation hydraulic fracturing, include the following steps：1）Obtain working face geology mining condition and presplitting tunnel overlying rock geological state, analysis subsidence trough boundary；2）Bandwidth and control subsidence trough boundary are gone along with sb. to guard him in the earth's surface construction grade determination protected as needed；3）According to step 2）Control subsidence trough boundary determines presplitting height and the position of overlying rock；4）According to step 3）Hydraulic fracturing operations are implemented in the presplitting height of determining overlying rock and position to the top plate of overlying rock.The method of the present invention can reduce Affected areas by mining to eliminate Mining subsidence suffered by earth's surface construction, reach protection earth's surface construction purpose.
Description
Technical field
Present invention relates particularly to a kind of methods controlling Affected areas by mining from underworkings orientation hydraulic fracturing, belong to and adopt
Mine technical method field.
Background technology
Coal is the main energy of today's society, and with the progress of the development and production technology of society, people are to the energy
Demand is increasing.After coal is produced from underground, top covering layer loses support, original stress equilibrium inside rock mass
State is destroyed, and the redistribution of rock mass internal stress is caused, and the rock mass around goaf is made to generate displacement, deformation until broken
It is bad.After area reaches certain range when goaf, above goaf earth's surface is caused to generate mobile and deformation.The movement of earth's surface with
The basis of deformation effect construction causes construction mobile and deformation occur, or even breakoff phenomenon occurs.
In the prior art, there is the method that land subsidence is controlled and mitigated by goaf filling.Goaf filling is to make
Mined out region is filled up with peripheral material, this method needs to use a large amount of filler, and costly, practical application is less.
And it is according to subsidence trough rim angle, delineation subsidence trough boundary mostly in actual production.This method can only be to adopting
Dynamic coverage is estimated and is demarcated, and active control earth's surface Affected areas by mining is unable to, can not be to being in subsidence region
Building play the role of actively protect.
Invention content
The method that hydraulic fracturing controls Affected areas by mining is oriented from underworkings the purpose of the present invention is to provide a kind of,
Concrete scheme is：
A method of Affected areas by mining being controlled from underworkings orientation hydraulic fracturing, is included the following steps：
1）Working face geology mining condition and presplitting tunnel overlying rock geological state are obtained, subsidence trough boundary is analyzed,
The working face geology mining condition and presplitting tunnel overlying rock geological state include overlying rock rock stratum layer position, rock stratum thickness
Degree, rock strength and crustal stress；
2）Bandwidth and control subsidence trough boundary are gone along with sb. to guard him in the earth's surface construction grade determination protected as needed；
3）According to step 1）Working face geology mining condition and presplitting tunnel overlying rock geological state and step 2）Control ground
What table moving basin boundary determined subsidence trough boundary moves horizontally distance S, determines presplitting height H=S* of overlying rock
tan 0；
4）According to step 3）The presplitting height H of determining overlying rock implements hydraulic fracturing operations to overlying rock.
Step 4）Described in hydraulic fracturing operations include the following steps：
41）Drilling parameter is determined according to presplitting height and overlying rock geological state；
42）According to step 41）Determining drilling parameter sequentially drills in presplitting back；
43）According to overlying rock geological state and drilling hole depth multiple groovings are obtained in drilling preset distance fluting；
44）In each grooving front and back position sealing of hole, high pressure water is injected to drilling, high pressure water, which acts at grooving, makes its both sides open
It splits, forms through crack；It cuts crack and cuts off tunnel overlying rock, form larger plane of weakness inside rock stratum；
45）With working face extraction to presplitting tunnel region, the overlying rock integral strength of fracture weakens, and slides and is layered along plane of weakness
It is orderly caving, subsidence trough is formed other than construction safety berm.
Further, step 41）In drilling parameter include bore position, drilling hole depth, the spacing of wells, bore angle.
In terms of hydraulic fracturing technology is applied to reduction rock mass strength, control Affected areas by mining by the present invention, i.e., by fixed
Rock mass strength is weakened to hydraulic fracturing, forms through crack, the transmission that cut-out overlying strata are broken to working face extraction direction reaches control
The purpose of Affected areas by mining processed.Hydraulic fracturing to the reduction major embodiment of rock mass both ways：First, passing through hydraulic fracture
Crack initiation and extension are transformed the macro microscopical structure of rock mass, weaken the mechanical property of rock mass；Second is that by water to the physical chemistry of rock
Effect, reduces the mechanical property of rock.The two collective effect weakens the mechanical property of rock mass, reduces the whole strong of overlying rock
Degree makes the overlying rock of fracture be orderly caving along plane of weakness sliding layering.This method and device can be effectively increased on face roof
The degree of crushing of rock stratum, increase is caving height, due to subsidence trough rim angle 0It is constant, to surface movement basin
Ground boundary can be moved to goaf direction, realized reduction Affected areas by mining and adopted damage suffered by earth's surface construction to eliminate
Evil protects earth's surface construction purpose.
Description of the drawings
Fig. 1 is the principle schematic present invention determine that presplitting height；
Fig. 2 is the arrangement schematic diagram that drills in the present invention；
Fig. 3 is the B-B sectional schematic diagrams in Fig. 2；
Fig. 4 is drilling arrangement sectional schematic diagram.
Specific implementation mode
Intend selecting certain 53041 lane of mine being test area.It is thick by obtaining overlying rock rock stratum layer position, rock stratum as shown in Fig. 1 ~ 4
Degree, rock strength and crustal stress, the point for removing heavy 10mm is subsidence trough boundary point A, determines subsidence trough boundary
Angle 0.Further, it is brick wood, the mixed village residential house of brick according to construction, is by mining area building protection grade classificationGrade,
It is 10m to go along with sb. to guard him bandwidth, and obtain subsidence trough boundary moves horizontally distance S, and the final presplitting for determining overlying rock is high
Spend H.
Fracturing borehole takes the mode of single arrangement, and as shown in Fig. 1 ~ 4, the spacing of wells is calculated by water injection hole radius of wetted bulb R,
It is determined as 10m to form through crack.Pre-splitting hole is arranged in away from top plate at 0.5 ~ 1m of coal column side, bore diameter 56 (75) mm,
Elevation angles are 70 ~ 90 °.
Using KZ54 type slotting drills, the prefabrication transverse grooving in rock stratum, hydrofracturing hole uses retroversion formula Splitting Method, by
Foot of hole is primary every 1.5 ~ 2m pressure breaks outward.
The overlying rock integral strength reduction layering of fracture zone fracture is orderly caving, in construction safety berm A ' with shape
At subsidence trough.
Claims (3)
1. a kind of method controlling Affected areas by mining from underworkings orientation hydraulic fracturing, which is characterized in that including following step
Suddenly：
1）Working face geology mining condition and presplitting tunnel overlying rock geological state are obtained, subsidence trough boundary is analyzed,
The working face geology mining condition and presplitting tunnel overlying rock geological state include overlying rock rock stratum layer position, rock stratum thickness
Degree, rock strength and crustal stress；
2）Bandwidth and control subsidence trough boundary are gone along with sb. to guard him in the earth's surface construction grade determination protected as needed；
3）According to step 1）Working face geology mining condition and presplitting tunnel overlying rock geological state and step 2）Control ground
What table moving basin boundary determined subsidence trough boundary moves horizontally distance S, determines presplitting height H=S* of overlying rock
tan 0；
4）According to step 3）The presplitting height H of determining overlying rock implements hydraulic fracturing operations to overlying rock.
2. the method according to claim 1 for controlling Affected areas by mining from underworkings orientation hydraulic fracturing, feature
It is, step 4）Described in hydraulic fracturing operations include the following steps：
41）Drilling parameter is determined according to presplitting height and overlying rock geological state；
42）According to step 41）Determining drilling parameter sequentially drills in presplitting back；
43）According to overlying rock geological state and drilling hole depth multiple groovings are obtained in drilling preset distance fluting；
44）In each grooving front and back position sealing of hole, high pressure water is injected to drilling, high pressure water, which acts at grooving, makes its both sides open
It splits, forms through crack；It cuts crack and cuts off tunnel overlying rock, form multiple planes of weakness inside overlying rock；
45）With working face extraction to presplitting tunnel region, the overlying rock integral strength of fracture weakens, and slides and is layered along plane of weakness
It is orderly caving, subsidence trough is formed other than construction safety berm.
3. the method according to claim 2 for controlling Affected areas by mining from underworkings orientation hydraulic fracturing, feature
It is：Step 41）In drilling parameter include bore position, drilling hole depth, the spacing of wells, bore angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810191325.0A CN108361011B (en) | 2018-03-08 | 2018-03-08 | Method for controlling mining influence range from underground roadway directional hydraulic fracturing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810191325.0A CN108361011B (en) | 2018-03-08 | 2018-03-08 | Method for controlling mining influence range from underground roadway directional hydraulic fracturing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108361011A true CN108361011A (en) | 2018-08-03 |
| CN108361011B CN108361011B (en) | 2020-06-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810191325.0A Expired - Fee Related CN108361011B (en) | 2018-03-08 | 2018-03-08 | Method for controlling mining influence range from underground roadway directional hydraulic fracturing |
Country Status (1)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339786A (en) * | 2018-08-22 | 2019-02-15 | 太原理工大学 | A kind of prefabricated Fracture orientation hydraulic fracturing cracking method |
| CN110130897A (en) * | 2019-06-13 | 2019-08-16 | 中国神华能源股份有限公司 | Roof weakening solution danger method |
| CN110173247A (en) * | 2019-05-19 | 2019-08-27 | 中铁十九局集团矿业投资有限公司 | A kind of Roof Control fracturing process of soft broken top plate ore body back production |
| CN110426501A (en) * | 2019-08-01 | 2019-11-08 | 重庆市能源投资集团科技有限责任公司 | A method of a layer hydraulic fracturing coverage is worn based on the determination of salinity measurement method |
| CN116480347A (en) * | 2023-06-26 | 2023-07-25 | 华能煤炭技术研究有限公司 | Hydraulic fracturing method for coal mine roof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339786A (en) * | 2018-08-22 | 2019-02-15 | 太原理工大学 | A kind of prefabricated Fracture orientation hydraulic fracturing cracking method |
| CN109339786B (en) * | 2018-08-22 | 2020-03-24 | 太原理工大学 | Directional hydraulic fracturing and cracking method for prefabricated cracks |
| CN110173247A (en) * | 2019-05-19 | 2019-08-27 | 中铁十九局集团矿业投资有限公司 | A kind of Roof Control fracturing process of soft broken top plate ore body back production |
| CN110130897A (en) * | 2019-06-13 | 2019-08-16 | 中国神华能源股份有限公司 | Roof weakening solution danger method |
| CN110426501A (en) * | 2019-08-01 | 2019-11-08 | 重庆市能源投资集团科技有限责任公司 | A method of a layer hydraulic fracturing coverage is worn based on the determination of salinity measurement method |
| CN116480347A (en) * | 2023-06-26 | 2023-07-25 | 华能煤炭技术研究有限公司 | Hydraulic fracturing method for coal mine roof |
| CN116480347B (en) * | 2023-06-26 | 2023-11-07 | 华能煤炭技术研究有限公司 | Hydraulic fracturing method for coal mine roof |
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| CN108361011B (en) | 2020-06-23 |
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Inventor after: Guo Wenbing Inventor after: Feng Zhanjie Inventor after: Tan Yi Inventor after: Yang Daming Inventor after: Xu Feiya Inventor before: Feng Zhanjie Inventor before: Guo Wenbing Inventor before: Tan Yi Inventor before: Yang Daming Inventor before: Xu Feiya |
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Granted publication date: 20200623 Termination date: 20210308 |