CN110081786A - Coal mine tight roof directional fracturing control method - Google Patents
Coal mine tight roof directional fracturing control method Download PDFInfo
- Publication number
- CN110081786A CN110081786A CN201910225656.6A CN201910225656A CN110081786A CN 110081786 A CN110081786 A CN 110081786A CN 201910225656 A CN201910225656 A CN 201910225656A CN 110081786 A CN110081786 A CN 110081786A
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- China
- Prior art keywords
- drilling
- coal mine
- tight roof
- control method
- composite perforator
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The present invention relates to coal mine tight roof pressure relief methods, specially coal mine tight roof directional fracturing control method.Solve the problems, such as the existing fracturing control method of coal mine tight roof be unable to reach accurate, efficient defect and.This method is realized by following steps: a. selectes tunnel, and laterally outstanding top is not caving the region that top plate is controlled as directional fracturing, using drilling machine every distanceLIt drills, drilling is arranged in a linear along tunnel length direction, in the vertical plane for the width direction that each drilling is located at back and at angle theta with back；Wherein, L is 1-3 meters, and θ is 60 ~ 80 °；B. composite perforator is assembled；C. each drilling is packed into a composite perforator, then carries out sealing of hole to each drilling, and the lead of the composite perforator in each drilling passes through sealing of hole and draws drilling, connect in drilling exit lead with detonator, each detonator is connect with initiating instrument；D. initiating instrument is lighted a fire, and is fulfiled assignment.Realize the accurate seam of coal mine tight roof.
Description
Technical field
The present invention relates to coal mine tight roof pressure relief methods, specially coal mine tight roof directional fracturing control method.
Background technique
Coal mine underground exploitation, CONTROL OF STRATA MOVEMENT is core, and wherein tight roof control is a big difficulty of CONTROL OF STRATA MOVEMENT.Work as coal
When assigning tight roof on layer, because its intensity is big, top plate, which is difficult to be broken, causes outstanding top step pitch big, and its structure that is broken is uncontrollable, lures
It is complicated to send out coal mine stope stress distribution, mine presses disaster serious.At present for the control of tight roof, explosion or waterpower pressure are mostly used
The method split, wherein blasting technique damage range is big, and security risk is high；When hydraulic fracturing technology controls tight roof, pressure break is split
Seam extension is directly affected by rock stratum three-dimensional stress distribution, and expanded configuration is unable to control.So top hard for coal mine at present
The control of plate is not possible to reach accurate, efficient, causes to be difficult to realize effective control for stope mine pressing, mine pressure disaster takes place frequently
Very big hidden danger is brought to safety in production, economic loss is serious.So being badly in need of inventing a kind of directional fracturing control for tight roof
Method processed realizes accurately controlling for tight roof fracture, reduces top plate area of suspension roof, weakens stope mine pressing and shows intensity, realizes
Top plate and mine press being precisely controlled for disaster.
Summary of the invention
The present invention solve the problems, such as defect existing for the existing fracturing control method of coal mine tight roof and, it is hard to provide a kind of coal mine
Resist plate directional fracturing control method stubbornly.The directional fracturing control method carries out tight roof using the method for composite gun perforation seam
Top release is cut, solves the problems, such as that tight roof difficulty difficult emit of collapsing causes face surrounding rock stress to concentrate, it is broken to implement orientation to tight roof
It splits, that realizes tight roof is precisely caving control.
The present invention is achieved by the following technical scheme: coal mine tight roof directional fracturing control method, is by as follows
What step was realized:
A. it selectes tunnel and laterally hangs top and be not caving the region that top plate is controlled as directional fracturing (the lateral area of suspension roof in tunnel is excessive
It is to cause the serious principal element of roadway deformation, top plate right above tunnel can not be gone to control), using drilling machine every distanceLIt drills, drilling is arranged in a linear along tunnel length direction, and each drilling is located at the vertical plane of the width direction of back
It is interior and at angle theta with back；Wherein, L is 1-3 meters, and θ is 60 ~ 80 °；
B. composite perforator is assembled；
C. each drilling is packed into a composite perforator, then carries out sealing of hole to each drilling, the composite perforator in each drilling
Lead passes through sealing of hole and draws drilling, connect in drilling exit lead with detonator, each detonator is connect with initiating instrument；
D. initiating instrument is lighted a fire, and is fulfiled assignment.Initiating instrument detonating primer, detonator ignite lead, and lead is ignited or starting composite gun perforation
Device.
Field monitoring the result shows that, after composite gun perforation, form a neat fracture surface, hard top along boring direction
Plate is broken along fracture surface, realizes being precisely controlled for top plate.Wherein, bore angle θ being precisely controlled to Guan Chong to top plate
The effect wanted, angle, θ are unfavorable for greatly very much the loading and sealing of hole operation of composite perforator, influence operating efficiency, angle, θ is too small to be made
At cutting, top range is too small, and control effect is poor, and general control angle, θ is within the scope of 60 ~ 80 °.
By using compound technique of perforating, reasonable Arrangement drilling construction under surge well optimizes compound the method for the invention
Gun perforation process, the accurate seam in tight roof realize efficiently being precisely controlled for roof caving, avoid outstanding top bring mine pressure calamity
Evil, guarantees the safety and high efficiency in coal seam.
1) the method for the invention, which has the advantage that, carries out perforation seam using multiple composite perforators at interval, can be
A neat fracture surface is formed in rock stratum, realizes the accurate cutting of rock stratum；2) composite gun perforation seam method compares shotfiring safety
Height, the controllability compared to hydraulic fracturing fracture face are stronger；3) party's forensic science is reliable, and process is simple, and it is hard to realize coal mine
The accurate seam of top plate, has broad application prospects.
Detailed description of the invention
Fig. 1 is the schematic diagram of the method for the invention.
In figure: 1- drilling, 2- composite perforator, 3- detonator, 4- sealing of hole, 5- initiator, the tunnel 6-, the side 7- are pushed up not to outstanding
It is caving top plate.
Specific embodiment
Coal mine tight roof directional fracturing control method, is realized by following steps:
A. it selectes 6 side of tunnel and is not caving the region that top plate 7 is controlled as directional fracturing to outstanding top, using drilling machine every distanceLInto
Row drilling, drilling 1 are arranged in a linear along 6 length direction of tunnel, and each drilling 1 is located at the vertical plane of the width direction of back
It is interior and at angle theta with back；Wherein, L is 1-3 meter (e.g., select 1 meter, 1.5 meters, 2 meters, 2.5 meters, 3 meters), θ for 60 ~
80 ° (e.g., selecting 60 °, 65 °, 70 °, 75 °, 80 °)；
Drilling, spacing distance L is related with composite perforator explosive payload, and spacing distance L is bigger, and composite perforator explosive payload increases therewith
Add, drill spacing distance L=composite perforator explosive payload/(600g ~ 800g).
B. composite perforator 2 is assembled；
C. each drilling 1 is packed into a composite perforator 2, then carries out sealing of hole to each drilling 1, the composite gun perforation in each drilling 1
The lead of device 2 passes through sealing of hole 4 and draws drilling, connect drilling 1 exit lead with detonator 3, and each detonator and initiating instrument 5 connect
It connects；
When it is implemented, 4 length of sealing of hole is generally 1 ~ 1.5 times of 2 length of composite perforator, to guarantee sealing of hole effect, it is ensured that multiple
Drilling will not be broken through by closing the high energy gas generated during perforation fracturing, and energy dissipation and aperture country rock is caused to rupture.
Each drilling 1 carries out through-hole processing to drilling 1 before being packed into composite perforator 2, using certain size drift.
D. initiating instrument 5 is lighted a fire, and is fulfiled assignment.Initiating instrument detonating primer, detonator ignite lead, and lead is ignited or started compound
Perforator.
Claims (3)
1. a kind of coal mine tight roof directional fracturing control method, which is characterized in that realized by following steps:
A. selecting tunnel (6), laterally outstanding top is not caving the region that top plate (7) is controlled as directional fracturing, using the every gauge of drilling machine
FromLIt drills, drilling (1) is arranged in a linear along tunnel (6) length direction, and each drilling (1) is located at the width of back
It is in the vertical plane in direction and at angle theta with back；Wherein, L is 1-3 meters, and θ is 60 ~ 80 °；
B. composite perforator (2) are assembled；
C. each drilling (1) is packed into a composite perforator (2), then carries out sealing of hole to each drilling (1), respectively in drilling (1)
The lead of composite perforator (2) passes through sealing of hole (4) and draws drilling, connect in drilling (1) exit lead with detonator (3), respectively
Detonator is connect with initiating instrument (5)；
D. initiating instrument (5) is lighted a fire, and is fulfiled assignment.
2. coal mine tight roof directional fracturing control method according to claim 1, which is characterized in that drilling spacing distance
L=composite perforator explosive payload/(600g ~ 800g).
3. coal mine tight roof directional fracturing control method according to claim 1 or 2, which is characterized in that sealing of hole (4) is long
Degree is 1 ~ 1.5 times of composite perforator (2) length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910225656.6A CN110081786A (en) | 2019-03-25 | 2019-03-25 | Coal mine tight roof directional fracturing control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910225656.6A CN110081786A (en) | 2019-03-25 | 2019-03-25 | Coal mine tight roof directional fracturing control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110081786A true CN110081786A (en) | 2019-08-02 |
Family
ID=67413566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201910225656.6A Pending CN110081786A (en) | 2019-03-25 | 2019-03-25 | Coal mine tight roof directional fracturing control method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765820A (en) * | 2020-07-14 | 2020-10-13 | 大同煤矿集团有限责任公司 | Weak disturbance directional blasting seam-making method for hard top plate |
| CN112696185A (en) * | 2021-01-28 | 2021-04-23 | 太原理工大学 | Composite blasting high-energy gas directional accurate fracturing method |
| CN113898400A (en) * | 2021-11-01 | 2022-01-07 | 重庆大学 | Hard roof empty roadway rock burst control method based on ground fracturing |
Citations (7)
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|---|---|---|---|---|
| US5505134A (en) * | 1993-09-01 | 1996-04-09 | Schlumberger Technical Corporation | Perforating gun having a plurality of charges including a corresponding plurality of exploding foil or exploding bridgewire initiator apparatus responsive to a pulse of current for simultaneously detonating the plurality of charges |
| CN103557006A (en) * | 2013-11-21 | 2014-02-05 | 兖矿集团有限公司 | Method for reasonably arranging roadways under large-area hard roof |
| CN105735993A (en) * | 2016-04-26 | 2016-07-06 | 辽宁工程技术大学 | Method for preventing hard top plate type rock burst on basis of carbon dioxide blasting |
| CN105888624A (en) * | 2016-04-26 | 2016-08-24 | 煤科集团沈阳研究院有限公司 | Carbon dioxide phase-change coal seam cracking guiding perforating device and outburst-preventing and scour-preventing method |
| CN108138556A (en) * | 2015-08-25 | 2018-06-08 | 欧文石油工具有限合伙公司 | EFP exploding wires |
| CN108843320A (en) * | 2018-06-12 | 2018-11-20 | 王帆 | Shift to an earlier date outburst elimination method in the tunnel of coal mine tight roof full face |
| CN108894784A (en) * | 2018-07-20 | 2018-11-27 | 中铁十九局集团矿业投资有限公司 | A kind of tight roof orientation acid fracturing control top pressure relief method |
-
2019
- 2019-03-25 CN CN201910225656.6A patent/CN110081786A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5505134A (en) * | 1993-09-01 | 1996-04-09 | Schlumberger Technical Corporation | Perforating gun having a plurality of charges including a corresponding plurality of exploding foil or exploding bridgewire initiator apparatus responsive to a pulse of current for simultaneously detonating the plurality of charges |
| CN103557006A (en) * | 2013-11-21 | 2014-02-05 | 兖矿集团有限公司 | Method for reasonably arranging roadways under large-area hard roof |
| CN108138556A (en) * | 2015-08-25 | 2018-06-08 | 欧文石油工具有限合伙公司 | EFP exploding wires |
| CN105735993A (en) * | 2016-04-26 | 2016-07-06 | 辽宁工程技术大学 | Method for preventing hard top plate type rock burst on basis of carbon dioxide blasting |
| CN105888624A (en) * | 2016-04-26 | 2016-08-24 | 煤科集团沈阳研究院有限公司 | Carbon dioxide phase-change coal seam cracking guiding perforating device and outburst-preventing and scour-preventing method |
| CN108843320A (en) * | 2018-06-12 | 2018-11-20 | 王帆 | Shift to an earlier date outburst elimination method in the tunnel of coal mine tight roof full face |
| CN108894784A (en) * | 2018-07-20 | 2018-11-27 | 中铁十九局集团矿业投资有限公司 | A kind of tight roof orientation acid fracturing control top pressure relief method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765820A (en) * | 2020-07-14 | 2020-10-13 | 大同煤矿集团有限责任公司 | Weak disturbance directional blasting seam-making method for hard top plate |
| CN112696185A (en) * | 2021-01-28 | 2021-04-23 | 太原理工大学 | Composite blasting high-energy gas directional accurate fracturing method |
| CN113898400A (en) * | 2021-11-01 | 2022-01-07 | 重庆大学 | Hard roof empty roadway rock burst control method based on ground fracturing |
| CN113898400B (en) * | 2021-11-01 | 2022-10-28 | 重庆大学 | Hard roof empty roadway rock burst control method based on ground fracturing |
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Application publication date: 20190802 |