CN109539920A - A kind of top plate fracturing method and device of coal mining - Google Patents
A kind of top plate fracturing method and device of coal mining Download PDFInfo
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- CN109539920A CN109539920A CN201811615976.4A CN201811615976A CN109539920A CN 109539920 A CN109539920 A CN 109539920A CN 201811615976 A CN201811615976 A CN 201811615976A CN 109539920 A CN109539920 A CN 109539920A
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- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
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Abstract
The present invention relates to technical field of coal exploitation, and in particular to a kind of top plate fracturing method and device of coal mining；Solving cannot orderly be caving due to pushing up always present in existing coal mining and lead to that mine pressure is high, recovery process there is technical issues that.The technical solution of the invention is as follows: a kind of top plate fracturing method of coal mining is characterized in that, comprising the following steps: 1) selects the position of horizontal well well head；2) horizontal well drilling；3) it cements the well；4) pressure test；5) mudding；6) top plate is segmented fracturing；7) crack pressure break；8) with blind plugging bridge plug shut-in well mouth.Meanwhile the present invention also provides a kind of top plate fracturing devices of coal mining applied to this method.
Description
Technical field
The present invention relates to technical field of coal exploitation, and in particular to a kind of the top plate fracturing method and dress of coal mining
It sets.
Background technique
Coal top plate is generally divided into base object model and Lao Ding, and old top is located at the top of base object model.Constantly forward with working face
It promotes, the top plate that goaf is left just loses support, influenced the stress cracking in top plate by mine pressure and gradually expanded, can generated
The inbreak of large area, strong impact force caused by inbreak easily causes the injures and deaths and equipment damage of personnel in the pit, while also pole has
Near region coal working face may be destroyed and influence to produce.In order to guarantee production safety, typically using from underground to base object model
The deep hole blasting method that multiple groups hole is bored on working face makes base object model fracturing and orderly collapses, thus reduce the mine pressure of base object model, with
Reduce accident potential.But this method has the disadvantage in that
1) down-hole drilling blast working amount is big, and operation intensity is high；
2) uncertainty of Face Pressure and underground repeat implementation explosion threatens the person peace of construction personnel always
Entirely；
3) existing top plate fracturing method can only be such that base object model is caving, but above working face about 60m-150m flour sand
Similarly there is crack defect in the old top girth rock in far field that rock and fine sandstone are constituted, by the effect of top layer mine pressure, during being caving
To press performance, security risk does not release completely strongly, therefore old will only push up across falling, and the peace of roof collapse can just be effectively reduced
Full hidden danger.
In conclusion guaranteeing coal mine production safety in order to which mine pressure is effectively reduced, very must using new top plate fracturing method
It wants.
Summary of the invention
In order to solve cannot to be orderly caving due to pushing up always present in existing coal mining and lead to that mine pressure is high, recovery process
There is technical issues that, the present invention provides a kind of top plate fracturing method and devices of coal mining.
The technical solution of the invention is as follows:
A kind of top plate fracturing method of coal mining, is characterized in that, comprising the following steps:
1) position of horizontal well well head is selected:
According to working face lateral position and working face extending direction, well head is determined by underground and ground location comparison diagram
Position；
2) horizontal well drilling:
2.1 from ground to the straight well section to working face of working face horizontal well drilling above old top in the middle part of；
2.2 along advance of the face direction horizontal well drilling horizontal segment；The length of horizontal well horizontal segment is the 2 of straight well segment length
To 15 times；
3) it cements the well；
4) pressure test:
4.1 surface pipe pressure tests；
4.2 production casing pressure tests；
5) mudding；
6) top plate is segmented fracturing:
6.1) horizontal well is divided into multiple construction sections, wherein the bottom of horizontal well horizontal segment be first section, every section of 50m-150m,
Every section is all made of bridge plug and sets；
6.2) top plate fracturing device is transported to first section with coiled tubing or drilling rod；
The top plate fracturing device includes the fracturing body of a gun, the connector and breech, setting for being connected to fracturing body of a gun both ends
Firing mount component, one end between connector and breech and in the body of a gun are fixed on the other end inside breech and sequentially pass through firing mount group
The primacord that detonating primer is rotatablely connected after part and connector, the multiple explosions for being arranged in firing mount component and being connected respectively with primacord
Unit；The quantity of the explosion unit is consistent with the quantity of construction section；Each explosion unit includes multiple axial successively along device
The demolition bomb of installation；The eyelet that same all demolition bombs of explosion unit are formed on rock mass outside casing is located on same cross section；
It is provided on the side wall of the firing mount component and the consistent shell hole of demolition bomb quantity；Setting and bullet on the outer wall of the fracturing body of a gun
Limiting slot is arranged on the inner wall of the fracturing body of a gun in the corresponding blind hole in setting position in hole；The fracturing body of a gun and connector, big gun
Tail is tightly connected；Position-limit mechanism is set between the firing mount component and the fracturing body of a gun；
6.3) after the depth of school, the multiple demolition bombs for igniting corresponding explosion unit in top plate fracturing device carry out bursting work, make
Multiple directional holes along horizontal well circumferentially are formed where obtaining first section in stratum；
6.4) top plate fracturing device is transported to adjacent construction section with cable pumping installations；
6.5) after the depth of school, the multiple demolition bombs for igniting corresponding explosion unit in top plate fracturing device carry out bursting work, make
Multiple directional holes along horizontal well circumferentially are formed where obtaining the construction section in stratum；
6.6) step 6.4-6.5 is repeated, until all construction section bursting works are completed, forms ditch between horizontal well and coal seam
Circulation passage；Make to sequentially form the directional hole along horizontal well circumferentially from the bottom of horizontal well horizontal segment to oral area；
7) crack pressure break；
7.1 pressure break
7.2 detection fracturing effects
8) with blind plugging bridge plug shut-in well mouth.
Further, in the shell hole corresponding to each explosion unit, the central axis of two of them shell hole is in firing mount
The axis of component, the center line of remaining shell hole and the axis of firing mount component form 15 °~35 ° angles.
Further, the demolition bomb includes cavity liner, main explosive, shell, priming.
Further, the top plate fracturing method of above-mentioned coal mining further includes step 9) detection mine pressure changing value.
Further, the horizontal well is " L " type well.
Further, the horizontal well is multilayer abnormal shape well.
Further, the crack pressure break in the step 7) is hydraulic fracturing.
It is special meanwhile the present invention also provides a kind of top plate fracturing device applied in above-mentioned top plate fracturing method
Place is: including the fracturing body of a gun, the connector that is connected to fracturing body of a gun both ends and breech, setting be between connector and breech
And the firing mount component in the body of a gun, one end are fixed on the other end inside breech and sequentially pass through the company of rotation after firing mount component and connector
The multiple explosion units for connecing the primacord of detonating primer, being arranged in firing mount component and be connected respectively with primacord；The explosion list
The quantity of member is consistent with the quantity of construction section.
Each explosion unit includes multiple demolition bombs axially successively installed along device；Same all demolition bombs of explosion unit
The eyelet formed on rock mass outside casing is located on same cross section.
It is provided on the side wall of the firing mount component and the consistent shell hole of demolition bomb quantity.On the outer wall of the fracturing body of a gun
Blind hole corresponding with the setting position of shell hole is set, limiting slot is set on the inner wall of the fracturing body of a gun.
The fracturing body of a gun is tightly connected with connector, breech.
Position-limit mechanism is set between the firing mount component and the fracturing body of a gun.
Further, in the shell hole corresponding to each explosion unit, the central axis of two of them shell hole is in firing mount
The axis of component, the center line of remaining shell hole and the axis of firing mount component form 15 °~35 ° angles.
Further, the demolition bomb includes cavity liner, main explosive, shell, priming.
The beneficial effect of the present invention compared with prior art is:
1, top top plate middle part horizontal well drilling of the present invention from earth's surface towards mine working face, and in the horizontal segment of horizontal well
Directional blasting is implemented using old top of the directional blasting technology to working face, and carries out crack pressure break, due to horizontal well horizontal segment
Length is 2 to 15 times of straight well segment length, so a wide range of fracture network of old top up and down can be formed, making to press mine influences
Biggish old top reliably can be orderly caving, and effectively reduced top plate mine pressure, mine safety hidden danger is eliminated, using of the invention
After fracturing method, mine drops are obvious, and compared with monomer branch, setting load is improved by 25920KN to 51600KN；Working resistance by
27200KN is improved to 64800KN；Supporting intensity is improved by 0.11MPa to 0.31MPa, and supporting intensity improves nearly 3 times.
2, a working face of the invention, which need to only bore a bite horizontal well, can complete whole fracturings of the face roof, only
It need to disposably put into, economy is obvious.
3, for the eyelet that the present invention generates on casing not in same section, casing damage is small；But it is produced on rock mass outside casing
The center line of raw all outer rock mass eyelets is the circle of diameter range 350mm-550mm, and all outer rocks in the same plane
Body opening eye is uniformly distributed；Interfere fracture strike effect stronger, can effective control critical eigenvalue trend, formation fracture pressure is reduced, when pressure break
Fracture strike along pit shaft radial expansion, avoiding intersecting for fracturing fracture between section and section gangs up, and improves the complete of seam net system
Kind degree, improves production capacity.
4, the fracture network in the present invention is complicated, and crack is long and range is wide, and one-stop operation can get larger range and effectively cause
It splits.
5, the present invention uses directional blasting and fracturing technique, and fracture strike and spread area can be made to be controlled.
6, the fracture monitoring technique in the present invention can involve range and trend with accurate judgement effective fracture.
7, the present invention is different from common down-hole drilling blast cracking method, whole of the invention construct ground surface into
Row, mechanization degree is high, and operation intensity is small, construction safety.
8, the present invention penetrates through entire pit shaft using blind plugging bridge plug shut-in well mouth, can be under high-pressure situations to rock mass outside casing
Softened, the channel of coal bed gas extraction can also be become.
9, present invention reduces adopt destruction of the advanced pressure to the lane Lin Kongwei.
10, it The present invention reduces operator's quantity, improves work efficiency.
11, present invention decreases water component, water component is 30~50m before pressure break, after pressure break water component be 20~
525m solves the problems, such as that gas is unbalanced and gushes out.
12, the top plate fracturing device in the present invention is applicable to different types of demolition bomb, and the scope of application is wide.
13, the top plate fracturing device use scope in the present invention is wide, and can be used to straight well can also be used for horizontal well waterpower pressure
Pretreatment before splitting.
Detailed description of the invention
Fig. 1 is the flow chart of top plate fracturing method of the present invention；
Fig. 2 is the structural schematic diagram of top plate fracturing device embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the embodiment borehole blasting bullet；
Fig. 4 is the effect picture of the embodiment；
Appended drawing reference
1- detonating primer, 2- supporting positive cover, 3- connector, the 4- fracturing body of a gun, 401- limiting slot, 402- blind hole, 5- firing mount component,
501- first end cover, the first via hole of 5011-, 502- firing mount, 503- second end cover, the second via hole of 5031-, 504- shell hole, 6- are quick-fried
Broken bullet, 601- cavity liner, the main explosive of 602-, 603- shell, 604- priming, 7- primacord, 8- breech, 9- position-limit mechanism, 10-
Casing, the outer rock mass of 11- casing, the outer rock mass eyelet of 12-.
Specific embodiment
Below in conjunction with drawings and the specific embodiments, the present invention will be further described.
Referring to Fig.1:
A kind of top plate fracturing method of coal mining, comprising the following steps:
1) position of horizontal well well head is selected:
It is true by underground and ground location comparison diagram on the ground according to working face lateral position and working face extending direction
Determine the position of well head, while to consider the layout in place, general construction site area is in 2500m2~4000m2.It is holded up to boring tower
Afterwards, it then carries out determining survey using GPS measuring system, drilling well carries out a repetition measurement before being completed again.
2) horizontal well drilling:
Horizontal well in the present embodiment is that " L " type is horizontal, its main feature is that straight well section is short, horizontal segment length, mean level section is
2-15 times of straight well section, therefore correct trepan model is selected first, 100m-150m meters of old top is (hard above working face
Hard rock) at, " L " type horizontal well is bored along advance of the face direction.In drilling process, an exploitation Φ 444.5mm drill bit
It is drilled into surface layer, then 339.7 × 9.65mm of tripping in Φ surface pipe；Two exploitation Φ 311.5mm drill bits, then tripping in Φ
The protective casing of 244.5 × 8.94mm；Three exploitations with Φ 216mm drill bit are drilled into target spot finishing drilling, then tripping in Φ 139.7 ×
7.72mm production casing.
3) it cements the well
139.7 × 7.72mm of Φ production casing and hole wall annulus to institute's tripping in inject oil/gas well cement, the oil
Gas well is A class g cement with cement.
4) pressure test:
4.1 surface pipe pressure tests:
Surface pipe Hou Ning rear pressure testing for 24 hours, pressure testing 2MPa, decompression in 30 minutes is 0.4Mpa, and pressure testing is qualified；
4.2 production casing pressure tests:
Production casing solidifies 60h, and pressure test is done after cleaning bottom of hole to foramen primum depth, and 13MPa is suppressed in aperture, and decompression in 30 minutes is little
In 0.4MPa, pressure testing is qualified.
5) mudding:
If it is serious to occur leakage problem in coal mine roof plate fracturing drilling process, mudding, as far as possible holding pit shaft need to be used
Intensity is consistent.
6) top plate is segmented fracturing:
6.1) horizontal well is divided into multiple construction sections, wherein the bottom of horizontal well horizontal segment be first section, every section of 50m-150m,
Every section is all made of bridge plug and sets；
6.2) top plate fracturing device is transported to first section with coiled tubing or drilling rod；The specific structure of the top plate fracturing device
See Fig. 2, Fig. 3；
6.3) after the depth of school, the multiple demolition bombs for igniting corresponding explosion unit in top plate fracturing device carry out bursting work, make
Multiple directional holes along horizontal well circumferentially are formed where obtaining first section in stratum；
6.4) top plate fracturing device is transported to adjacent construction section with cable pumping installations；
6.5) after the depth of school, the multiple demolition bombs for igniting corresponding explosion unit in top plate fracturing device carry out bursting work, make
Multiple directional holes along horizontal well circumferentially are formed where obtaining the construction section in stratum；
6.6) step 6.4-6.5 is repeated, until all construction section bursting works are completed, forms ditch between horizontal well and coal seam
Circulation passage；Make to sequentially form the directional hole along horizontal well circumferentially from the bottom of horizontal well horizontal segment to oral area；
7) crack pressure break:
7.1 carry out pressure break to rock mass outside casing using hydraulic pressure, and the crack for forming horizontal well and the outer rock mass of casing penetrates through,
For the fracturing effect for guaranteeing top plate fracturing, discharge capacity is 4m when pressure break3/ min~8m3/ min, every layer of 300m of fracturing fluid3~600m3,
For sand than 6~10%, slippery water viscosity requirement is less than 10mPa.s；Base fluid viscosity requirement is 25-40mPa.s.
7.2 detection fracturing effects
Fracturing process detects fracturing effect using microseism facility, observes length, width and the trend in crack.
8) blind plugging bridge plug shut-in well mouth:
With specific purpose tool by blind plugging bridge plug down toward setting position, after blind plugging bridge plug is set, specific purpose tool of having given up, use is blind
Stifled bridge plug shut-in well mouth, penetrates through entire pit shaft, can soften under high-pressure situations to rock mass outside casing, can also become coal bed gas
The channel of extraction.
9) detection mine presses changing value；
Meanwhile the present invention also provides a kind of top plate fracturing devices applied in above-mentioned top plate fracturing method.
Referring to Fig. 2, Fig. 3 and Fig. 4, which includes detonating primer 1, supporting positive cover 2, connector 3, the fracturing body of a gun 4, bullet
Frame component 5, demolition bomb 6, primacord 7 and breech 8.
The both ends of the fracturing body of a gun 4 are connected through a screw thread connector 3 and breech 8 respectively, and to pass through "O"-ring close for junction
Envelope.Firing mount component 5 is coaxially disposed inside the fracturing body of a gun 4,5 one end of firing mount component is withstood on the end face of connector 3, and the other end withstands on big gun
On the end face of tail 8.
Firing mount component 5 includes firing mount 502 and the first end cover 501 and second end cover that are separately fixed at 502 both ends of firing mount
503.Axially disposed first via hole 5011 of first end cover 501；Axially disposed second via hole 5031 of second end cover 503.
7 one end of primacord is fixed on inside breech 8, and the other end enters 5 inner cavity of firing mount component by the second via hole 5031 and connects
Demolition bomb 6 is connect, 3 inside of connector is then entered by the first via hole 5011 and is connect with detonating primer 1, primacord 7 can be with 1 phase of detonating primer
To rotation.Supporting positive cover 2 is set between detonating primer 1 and connector 3, and supporting positive cover 2 is located at the end of connector 3.
The multiple explosion units of setting in firing mount component 5, the quantity of explosion unit and the quantity of construction section are consistent.Multiple explosions
Unit is connected with primacord 7 respectively.
In the present embodiment, each explosion unit includes six demolition bombs 6, and demolition bomb 6 includes cavity liner 601, main explosive
602, shell 603, priming 604.It is provided on the side wall of firing mount component 5 and the consistent shell hole 504 of 6 quantity of demolition bomb；Every
In shell hole 504 corresponding to a explosion unit, the central axis of two of them shell hole 504 in the axis of firing mount component 5, remaining
The axis of the center line of shell hole 504 and firing mount component 5 forms 15 °~35 ° angles, adjacent demolition bomb 6 in each explosion unit
Between 60 ° of dextrorotation distribution.The eyelet that the cloth bullet mode forms six demolition bombs 6 in same explosion unit on casing 10 is not
On same cross section, and the six outer rock mass eyelets 12 formed on rock mass 11 outside casing are located on same cross section, and six
The line of outer 12 center line of rock mass eyelet is circle, and six outer rock mass eyelets 12 are uniformly distributed in the circle；The diameter of a circle is big
It is small deep be adjusted to be worn according to demolition bomb 6.
Blind hole 402 corresponding with the setting position of shell hole 501 is set on the outer wall of the fracturing body of a gun 4.
Position-limit mechanism 9 is set between firing mount component 5 and the fracturing body of a gun 4, and position-limit mechanism 9 is to be fixed in first end cover 501
Limit plate and the limiting slot 401 of 4 side wall of the fracturing body of a gun is set.Position-limit mechanism 9 is for controlling firing mount component 5 and the fracturing body of a gun
4 relative position guarantees that shell hole 501 is corresponding with the position of blind hole 402.
The installation step of the device is as follows:
1, primacord 7 is connect with detonating primer 1, each demolition bomb 6；
2, each demolition bomb 6 is packed into firing mount component 5；
3, the firing mount component 5 for having installed demolition bomb 6 is packed into the fracturing body of a gun 4, and guarantees that limit plate is located at limiting slot 401
It is interior；
4, the connector 3 and breech 8 at 4 both ends of the fracturing body of a gun are installed, guarantee that detonating primer 1 and primacord 7 are in default installation position
It sets.
The above description is only an embodiment of the present invention, and it is not intended to limit the protection scope of the present invention, all to utilize the present invention
Equivalent structure transformation made by specification and accompanying drawing content, is applied directly or indirectly in other relevant technical fields, and wraps
It includes in scope of patent protection of the invention.
Claims (10)
1. a kind of top plate fracturing method of coal mining, which comprises the following steps:
1) position of horizontal well well head is selected:
According to working face lateral position and working face extending direction, the position of well head is determined by underground and ground location comparison diagram
It sets；
2) horizontal well drilling:
2.1 from ground to the straight well section to working face of working face horizontal well drilling above old top in the middle part of；
2.2 along advance of the face direction horizontal well drilling horizontal segment；The length of horizontal well horizontal segment is the 2 to 15 of straight well segment length
Times；
3) it cements the well；
4) pressure test:
4.1 surface pipe pressure tests；
4.2 production casing pressure tests；
5) mudding；
6) top plate is segmented fracturing:
6.1) horizontal well is divided into multiple construction sections, wherein the bottom of horizontal well horizontal segment be first section, every section of 50m-150m, every section
Bridge plug is all made of to set；
6.2) top plate fracturing device is transported to first section with coiled tubing or drilling rod；
The top plate fracturing device includes the fracturing body of a gun (4), the connector (3) and breech for being connected to the fracturing body of a gun (4) both ends
(8), it is arranged between connector (3) and breech (8) and the firing mount component (5) in the body of a gun, one end is fixed on breech (8) inside
The other end sequentially passes through firing mount component (5) and connector (3) and is rotatablely connected the primacord (7) of detonating primer (1) afterwards, is arranged in firing mount group
The multiple explosion units being connected in part (5) and with primacord (7) respectively；The quantity of the explosion unit and the quantity one of construction section
It causes；
Each explosion unit includes multiple demolition bombs (6) axially successively installed along device；Same all demolition bombs of explosion unit
(6) eyelet formed on rock mass outside casing is located on same cross section；
It is provided on the side wall of the firing mount component (5) and the consistent shell hole of demolition bomb (6) quantity (504)；The fracturing body of a gun
(4) corresponding with the setting position of shell hole (501) blind hole (402) is set on outer wall, on the inner wall of the fracturing body of a gun (4)
It is arranged limiting slot (401)；
The fracturing body of a gun (4) is tightly connected with connector (3), breech (8)；
Position-limit mechanism (9) are set between the firing mount component (5) and the fracturing body of a gun (4)；
6.3) after the depth of school, the multiple demolition bombs for igniting corresponding explosion unit in top plate fracturing device carry out bursting work, so that first
Multiple directional holes along horizontal well circumferentially are formed where section in stratum；
6.4) top plate fracturing device is transported to adjacent construction section with cable pumping installations；
6.5) after the depth of school, the multiple demolition bombs for igniting corresponding explosion unit in top plate fracturing device carry out bursting work, so that should
Multiple directional holes along horizontal well circumferentially are formed where construction section in stratum；
6.6) step 6.4-6.5 is repeated, until all construction section bursting works are completed, forms ditch all between horizontal well and coal seam
Road；Make to sequentially form the directional hole along horizontal well circumferentially from the bottom of horizontal well horizontal segment to oral area；
7) crack pressure break；
7.1 pressure break
7.2 detection fracturing effects
8) with blind plugging bridge plug shut-in well mouth.
2. a kind of top plate fracturing method of coal mining according to claim 1, it is characterised in that: the top plate fracturing
In device, in the shell hole (504) corresponding to each explosion unit, the central axis of two of them shell hole (504) is in firing mount
The axis of component (5), the center line of remaining shell hole (504) and the axis of firing mount component (5) form 15 °~35 ° angles.
3. a kind of top plate fracturing method of coal mining according to claim 2, it is characterised in that: the top plate fracturing
In device, the demolition bomb (6) includes cavity liner (601), main explosive (602), shell (603), priming (604).
4. a kind of top plate fracturing method of coal mining according to any one of claims 1 to 3, it is characterised in that: also wrap
Include step 9) detection mine pressure changing value.
5. a kind of top plate fracturing method of coal mining according to claim 4, it is characterised in that: the horizontal well is
" L " type well.
6. a kind of top plate fracturing method of coal mining according to claim 4, it is characterised in that: the horizontal well is
Multilayer abnormal shape well.
7. a kind of top plate fracturing method of coal mining according to claim 5, it is characterised in that: in the step 7)
Crack pressure break be hydraulic fracturing.
8. a kind of top plate fracturing device of coal mining, it is characterised in that: including the fracturing body of a gun (4), be connected to fracturing
The connector (3) and breech (8) at the body of a gun (4) both ends, the firing mount group for being arranged between connector (3) and breech (8) and being located in the body of a gun
Part (5), one end are fixed on that the internal other end of breech (8) sequentially passes through firing mount component (5) and connector (3) is rotatablely connected detonating primer afterwards
(1) multiple explosion units that primacord (7), setting are connected with primacord (7) in firing mount component (5) and respectively；It is described quick-fried
The quantity of broken unit is consistent with the quantity of construction section；
Each explosion unit includes multiple demolition bombs (6) axially successively installed along device；Same all demolition bombs of explosion unit
(6) eyelet formed on rock mass outside casing is located on same cross section；
It is provided on the side wall of the firing mount component (5) and the consistent shell hole of demolition bomb (6) quantity (504)；The fracturing body of a gun
(4) corresponding with the setting position of shell hole (501) blind hole (402) is set on outer wall, on the inner wall of the fracturing body of a gun (4)
It is arranged limiting slot (401)；
The fracturing body of a gun (4) is tightly connected with connector (3), breech (8)；
Position-limit mechanism (9) are set between the firing mount component (5) and the fracturing body of a gun (4).
9. a kind of top plate fracturing device of coal mining according to claim 8, it is characterised in that: in each explosion list
In shell hole corresponding to member (504), the central axis of two of them shell hole (504) is in the axis of firing mount component (5), remaining bullet
The center line in hole (504) and the axis of firing mount component (5) form 15 °~35 ° angles.
10. a kind of top plate fracturing device of coal mining according to claim 8 or claim 9, it is characterised in that: the explosion
Bullet (6) includes cavity liner (601), main explosive (602), shell (603), priming (604).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577232A (en) * | 2020-05-21 | 2020-08-25 | 重庆市能源投资集团科技有限责任公司 | Coal mine underground fracturing control safety guarantee method |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4903772A (en) * | 1987-11-16 | 1990-02-27 | Johnson James O | Method of fracturing a geological formation |
| CN102661689A (en) * | 2012-05-11 | 2012-09-12 | 大同煤矿集团有限责任公司 | Stratified blasting method for coal mine hard roof |
| CN102678120A (en) * | 2012-05-18 | 2012-09-19 | 河南大有能源股份有限公司 | Method for releasing pressure and removing danger of rock burst |
| CN102852546A (en) * | 2011-06-30 | 2013-01-02 | 河南煤业化工集团研究院有限责任公司 | Method for pre-pumping coal roadway stripe gas of single soft protruded coal seam of unexploited area |
| CN103590802A (en) * | 2013-11-26 | 2014-02-19 | 西安通源石油科技股份有限公司 | Horizontal well staged fracturing device and method |
| CN204960882U (en) * | 2015-10-09 | 2016-01-13 | 中煤科工集团重庆研究院有限公司 | Coal mine underground hydraulic fracturing drilling and hole sealing device |
| CN105927270A (en) * | 2016-07-05 | 2016-09-07 | 重庆大学 | Gas extraction method for parallel hole arrangement of L-shaped drilling and fracturing weakening top plate |
| CN106884670A (en) * | 2017-03-06 | 2017-06-23 | 西安科技大学 | A kind of support method for underground goaf roof of coal mine |
| CN106930744A (en) * | 2017-05-08 | 2017-07-07 | 河南理工大学 | A kind of millisecond multistage directional blasting dry ice fracturing method and blasting cartridge |
| CN107387082A (en) * | 2017-07-31 | 2017-11-24 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of method for weakening coal seam tight roof |
| CN108756884A (en) * | 2018-06-12 | 2018-11-06 | 王帆 | Coal mine tight roof full face ground shifts to an earlier date outburst elimination method |
| CN209416187U (en) * | 2018-12-27 | 2019-09-20 | 西安通源石油科技股份有限公司 | A kind of top plate fracturing device of coal mining |
| CN110306961A (en) * | 2019-06-19 | 2019-10-08 | 陕西浩兴坤达新能源科技有限公司 | It is a kind of along roof Floor water horizontal well drilling well staged fracturing method |
| AU2021106168A4 (en) * | 2021-08-20 | 2021-10-28 | China University Of Mining And Technology | High-gas Coal Seam Group Pressure Relief Mining Method Based on Gob-side Entry Retaining in the First Mining Whole Rock Pressure Relief Working Face |
-
2018
- 2018-12-27 CN CN201811615976.4A patent/CN109539920B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4903772A (en) * | 1987-11-16 | 1990-02-27 | Johnson James O | Method of fracturing a geological formation |
| CN102852546A (en) * | 2011-06-30 | 2013-01-02 | 河南煤业化工集团研究院有限责任公司 | Method for pre-pumping coal roadway stripe gas of single soft protruded coal seam of unexploited area |
| CN102661689A (en) * | 2012-05-11 | 2012-09-12 | 大同煤矿集团有限责任公司 | Stratified blasting method for coal mine hard roof |
| CN102678120A (en) * | 2012-05-18 | 2012-09-19 | 河南大有能源股份有限公司 | Method for releasing pressure and removing danger of rock burst |
| CN103590802A (en) * | 2013-11-26 | 2014-02-19 | 西安通源石油科技股份有限公司 | Horizontal well staged fracturing device and method |
| CN204960882U (en) * | 2015-10-09 | 2016-01-13 | 中煤科工集团重庆研究院有限公司 | Coal mine underground hydraulic fracturing drilling and hole sealing device |
| CN105927270A (en) * | 2016-07-05 | 2016-09-07 | 重庆大学 | Gas extraction method for parallel hole arrangement of L-shaped drilling and fracturing weakening top plate |
| CN106884670A (en) * | 2017-03-06 | 2017-06-23 | 西安科技大学 | A kind of support method for underground goaf roof of coal mine |
| CN106930744A (en) * | 2017-05-08 | 2017-07-07 | 河南理工大学 | A kind of millisecond multistage directional blasting dry ice fracturing method and blasting cartridge |
| CN107387082A (en) * | 2017-07-31 | 2017-11-24 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of method for weakening coal seam tight roof |
| CN108756884A (en) * | 2018-06-12 | 2018-11-06 | 王帆 | Coal mine tight roof full face ground shifts to an earlier date outburst elimination method |
| CN209416187U (en) * | 2018-12-27 | 2019-09-20 | 西安通源石油科技股份有限公司 | A kind of top plate fracturing device of coal mining |
| CN110306961A (en) * | 2019-06-19 | 2019-10-08 | 陕西浩兴坤达新能源科技有限公司 | It is a kind of along roof Floor water horizontal well drilling well staged fracturing method |
| AU2021106168A4 (en) * | 2021-08-20 | 2021-10-28 | China University Of Mining And Technology | High-gas Coal Seam Group Pressure Relief Mining Method Based on Gob-side Entry Retaining in the First Mining Whole Rock Pressure Relief Working Face |
Non-Patent Citations (2)
| Title |
|---|
| 范屹东;: "定向水力压裂技术在7806切眼的应用", 煤, no. 12, pages 16 - 17 * |
| 贾建称;陈晨;董夔;吴艳;吴敏杰;: "碎软低渗煤层顶板水平井分段压裂高效抽采煤层气技术研究", 天然气地球科学, no. 12, pages 97 - 105 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577232A (en) * | 2020-05-21 | 2020-08-25 | 重庆市能源投资集团科技有限责任公司 | Coal mine underground fracturing control safety guarantee method |
| CN111577232B (en) * | 2020-05-21 | 2022-03-01 | 重庆市能源投资集团科技有限责任公司 | Coal mine underground fracturing control safety guarantee method |
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