CN110513142A - The polyurethane sealing aperture apparatus and its construction method of Underwell anti-injection hole anti-leak - Google Patents
The polyurethane sealing aperture apparatus and its construction method of Underwell anti-injection hole anti-leak Download PDFInfo
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- CN110513142A CN110513142A CN201910874992.3A CN201910874992A CN110513142A CN 110513142 A CN110513142 A CN 110513142A CN 201910874992 A CN201910874992 A CN 201910874992A CN 110513142 A CN110513142 A CN 110513142A
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- polyurethane
- hole
- sealing
- injection
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- 229920002635 polyurethane Polymers 0.000 title claims abstract description 120
- 239000004814 polyurethane Substances 0.000 title claims abstract description 120
- 238000007789 sealing Methods 0.000 title claims abstract description 109
- 239000007924 injection Substances 0.000 title claims abstract description 84
- 238000002347 injection Methods 0.000 title claims abstract description 84
- 238000010276 construction Methods 0.000 title claims abstract description 11
- 238000005192 partition Methods 0.000 claims abstract description 185
- 238000000605 extraction Methods 0.000 claims abstract description 44
- 239000007788 liquid Substances 0.000 claims abstract description 43
- 238000005553 drilling Methods 0.000 claims abstract description 41
- 238000001125 extrusion Methods 0.000 claims abstract description 34
- 230000000694 effects Effects 0.000 claims abstract description 25
- 239000003245 coal Substances 0.000 claims abstract description 17
- 230000005012 migration Effects 0.000 claims abstract description 7
- 238000013508 migration Methods 0.000 claims abstract description 7
- 239000011435 rock Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 21
- 230000004888 barrier function Effects 0.000 claims description 18
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 8
- 229920001971 elastomer Polymers 0.000 claims description 6
- 229910021529 ammonia Inorganic materials 0.000 claims description 5
- 150000002148 esters Chemical class 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 3
- 238000009530 blood pressure measurement Methods 0.000 claims description 3
- 238000011161 development Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 230000006378 damage Effects 0.000 abstract description 5
- 208000027418 Wounds and injury Diseases 0.000 abstract description 3
- 239000013043 chemical agent Substances 0.000 abstract description 3
- 208000014674 injury Diseases 0.000 abstract description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 239000000243 solution 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The polyurethane sealing aperture apparatus and its construction method of Underwell anti-injection hole anti-leak, including the extraction arranged along the longitudinal direction or pressure-measuring pipe, the first filling tube, the second filling tube and gas injection or liquid injection pipe, first partition, the first polyurethane foamed bags, second partition, third partition, the second polyurethane foamed bags and the 4th partition are disposed in extraction or pressure-measuring pipe from the front to the back, the first sealing section is formed between first partition and second partition, elastic extrusion chamber is formed between second partition and third partition, forms the second sealing section between third partition and the 4th partition.The present invention adheres to drilling crushed zone coal and rock to form an entirety, block the channel of Gas Flow, increase the route of gas migration, frictional resistance increases, and barometric gradient is unchanged, to increase the difficulty of gas migration, sealing of hole effect is substantially increased, while reducing chemical agent to the injury of human body and reducing artificial physical work amount.
Description
Technical field
The invention belongs to Safety of Coal Mine Production technical fields, and in particular to a kind of polyurethane sealing of Underwell anti-injection hole anti-leak
Aperture apparatus and its construction method.
Background technique
Gas is predicted and carried out to the coal-bed gas pressure basic parameter important as coal-bed gas in Coal Seam Outburst Hazard
Extracting result inspection etc. plays a significant role.Especially during carrying out gas pressure measurement, due to coal seam itself
The influence of the factors such as the mode of geological conditions, sealing of hole, so that actual borehole sealing of hole effect and expected effect generate certain difference
Away from.Sealing of hole effect how is improved, is of great significance for the measurement of coal-bed gas pressure.
For highly gassy mine, the work of gas pre-drainage is the envelope that the necessary links of mine safety production ensure to drill
Hole effect is to improve the first step of extraction rate and extracting result.Although the method for drilling and sealing technology gradually increases, every kind
Mode, the method for sealing of hole have its respective advantage and disadvantage and the scope of application.
Drilling and sealing is carried out using polyurethane, principle is: polyurethane A liquid is sufficiently mixed with B liquid, and polyurethane has
Polyurethane mixed liquor is placed in drilling by the characteristic of high-expansion, carries out expanding substantial borehole space in a short time, is had viscous
The liquid polyurethane of attached property will enter in hole-crack of drilling wall surface, block the channel of Gas Flow, while the crushed zone that will drill
Coal and rock sorption sticks to form an entirety, prevents the gas in coal seam from flowing out from the near wall of drilling, to influence sealing of hole
Effect.It is had the following problems during using polyurethane sealing of hole:
1) existing polyurethane sealing of hole technology, at sealing of hole initial stage since polyurethane does not solidify completely, gas pressure is larger in coal seam
When, there is extraction or pressure-measuring pipe goes out drilling, may cause the casualties and equipment damage of drilling outside；
2) polyurethane is before dilatancy hardening, and there are the air of larger space in drilling, and in closed drilling, air can not be arranged
It removes, then can be compressed into hole-crack of drilling wall surface, so that the polyurethane for the state of sticking together be made to be difficult to enter, can not block
The channel of Gas Flow and the crushed zone coal and rock sorption that will drill stick to form an entirety, in the broken of drilling wall peripheral
Broken band still can exist for the channel of Gas Flow offer, and then influence the sealing of hole effect of drilling；
3) during polyurethane dilatancy hardening, it may appear that a degree of shrinkage phenomenon is full of the drilling of polyurethane originally, due to
The generation of contraction and will appear hole, to influence sealing of hole effect；
4) during broadcasting extraction or pressure-measuring pipe, drilling central location, especially drilling front end are placed it in, is carrying out sealing of hole
In the process, the problems such as extraction or pressure-measuring pipe are located at the edge of drilling, are unfavorable for sealing of hole and influence sealing of hole effect.
Summary of the invention
The object of the present invention is to provide a kind of polyurethane sealing aperture apparatus of Underwell anti-injection hole anti-leak and its construction method, with
There are sealing of hole initial stages for the solution prior art since polyurethane does not solidify completely, gas pressure is larger in coal seam, extraction or survey occurs
Pressure pipe goes out drilling, may cause the casualties of drilling outside；Polyurethane is before dilatancy hardening, and there are larger in drilling
The air in space, in closed drilling centre, air be cannot exclude, then can be compressed into hole-crack of drilling wall surface,
To make the polyurethane for the state of sticking together cannot be introduced into, and then influence the sealing of hole effect of drilling；During polyurethane dilatancy hardening, meeting
There is a degree of shrinkage phenomenon, originally be full of polyurethane drilling, due to contraction generation and will appear hole, thus shadow
Ring sealing of hole effect；During broadcasting extraction or pressure-measuring pipe, extraction or pressure-measuring pipe are placed in drilling central location always, are conducive to seal
Hole and raising sealing of hole effect, while also no the problems such as placing this chemical agent of polyurethane, reducing its injury to human body.
In order to solve the above technical problems, the present invention adopts the following technical scheme: the polyurethane sealing of Underwell anti-injection hole anti-leak
Aperture apparatus is guiding with the direction in the aperture of drilling to bottom hole, from the front to the back successively includes the extraction arranged along the longitudinal direction
Or pressure-measuring pipe, the first filling tube, the second filling tube and gas injection or liquid injection pipe, it is set gradually on extraction or pressure-measuring pipe from the front to the back
There are first partition, the first polyurethane foamed bags, second partition, third partition, the second polyurethane foamed bags and the 4th partition, first
Form the first sealing section between partition and second partition, form elastic extrusion chamber between second partition and third partition, third every
The second sealing section is formed between plate and the 4th partition, the first filling tube passes through first partition and connect with the first polyurethane foamed bags,
Second filling tube is connect after sequentially passing through first partition, second partition, third partition from the front to the back with the second polyurethane foamed bags,
Gas injection or liquid injection pipe are connected to after sequentially passing through first partition, second partition from the front to the back with elastic extrusion chamber.
First partition and the 4th partition pass through fastener and are fixedly connected on extraction or pressure-measuring pipe, second partition and third
Partition, which passes through to lead, to be set on extraction or pressure-measuring pipe, has certain rub between guide sleeve inner wall and extraction or pressure-measuring pipe outer circle
Wipe power, first partition, second partition, third partition and the 4th partition periphery be equipped with rubber seal.
Second partition be equipped with can from the first check valve of the first sealing section one-way flow into elastic extrusion chamber, third every
Plate is equipped with can be from the second one-way valve of the second sealing section one-way flow into elastic extrusion chamber.
4th partition leading flank is equipped with the rigid barrier device being located in the second sealing section；After rigid barrier device is thick before being integrally in
Thin circular cone barrel structure, rigid barrier device include upper half taper cone barrel and lower half taper cone barrel, upper half taper cone barrel rear end and lower half circle
Cone cylinder rear end passes through hinge and torsional spring is connected to the 4th partition leading flank.
The construction method of the polyurethane sealing aperture apparatus of Underwell anti-injection hole anti-leak, includes the following steps,
A, first drilled using drilling machine in underground, form cylindrical hole, reuse hydraulic slotted liner technique measure in hole into
Row reaming forms at least two annular grooves；
B, rigid barrier device is installed to the 4th partition leading flank, first partition, second partition, third partition eccentric position
It opens for passing through the first filling tube, the second filling tube and gas injection or the perforation of liquid injection pipe, in first partition, second partition, the
Rubber seal is installed in the periphery of three partitions and the 4th partition, and it is unidirectional to install first respectively on second partition and third partition
Valve and second one-way valve；
C, by the 4th partition, the second polyurethane foamed bags, third partition, second partition, the first polyurethane foamed bags and first every
Plate is sequentially arranged at from the front to the back on extraction or pressure-measuring pipe；
D, the first filling tube, the second filling tube and gas injection or liquid injection pipe are passed through into corresponding perforation, the first filling tube passes through the
Connect with the first polyurethane foamed bags after one partition by quick plug, the second filling tube sequentially pass through from the front to the back first every
It is connect by quick plug with the second polyurethane foamed bags after plate, second partition, third partition, gas injection or liquid injection pipe are from the front to the back
It is connected to after sequentially passing through first partition, second partition with elastic extrusion chamber, assembles the poly- ammonia of Underwell anti-injection hole anti-leak since then
Ester hole sealing device；
E, the polyurethane sealing aperture apparatus of assembled Underwell anti-injection hole anti-leak is extended rearward into hole by the aperture of hole, when
Stop conveying Underwell anti-injection backward when first partition enters in hole and rigid barrier device is located in one of on rear side of annular groove
The polyurethane sealing aperture apparatus of hole anti-leak；
F, polyurethane mixing is injected into the first sealing section and the second sealing section by the first filling tube and the second filling tube respectively
Liquid carries out sealing of hole；
G, by gas injection or liquid injection pipe gas injection or fluid injection into elastic extrusion chamber, make second partition and third partition respectively forwardly and
Not fully hardened polyurethane is squeezed backward, improves the sealing of hole effect of the first sealing section and the second sealing section；
H, after polyurethane is fully hardened, certain pressure is kept in elastic extrusion chamber, prevent gas further to tunnel
The valve at gas injection or liquid pipe front port is closed in the migration at place；
I, it is more than completion all drilling and sealings work, by extraction or pressure-measuring pipe start carry out coal-bed gas pressure measurement or
The development of gas drainage work.
The detailed process of step f is, by the feed inlet of the first filling tube and the second filling tube respectively with the material feeding outside hole
Polyurethane mixed liquor is delivered to the first polyurethane foamed bags and the second polyurethane foam by material feeding pump by pump interface connection respectively
In bag, polyurethane foamed bags are burst in the polyurethane mixed liquor expansion in the first polyurethane foamed bags and the second polyurethane foamed bags
Into in hole, until full of the space in entire first sealing section and the second sealing section；The sky in space where polyurethane
Gas is squeezed by it, is entered in elastic extrusion chamber by the first check valve and second one-way valve, and polyurethane is allow to enter aperture wall
In the hole-crack in face, hole crushed zone coal and rock is adhered to form an entirety, blocks the channel of Gas Flow；Meanwhile elasticity
The polyurethane of extrusion chamber front and rear sides will push second partition and move backward makes elasticity squeeze space with the forward movement of third partition
Become smaller；Material feeding closes the valve at two filling tube feed inlets after finishing.
The detailed process of step g is to connect the import of gas injection or liquid pipe with gas injection or liquid pump, and gas injection or liquid pump will be to bullets
Property squeeze space in injection gas or liquid to certain pressure after, while push second partition move forward and third partition to
Mobile afterwards that elasticity extruding space is made to become larger, second partition and third partition squeeze the not fully hardened poly- ammonia in front and rear sides respectively
Ester is further the compactness for improving the first sealing section and the second sealing section inner urethane, again will be because of the hole of curing shrinkage
Gap is full of.
Sealing of hole initial stage due to polyurethane not completely solidification, go out in boring procedure in extraction or pressure-measuring pipe, in coal seam watt
When this pressure is larger, the gas pressure of hole bottom pushes whole device to move forward, when what is be arranged on the 4th partition leading flank
When moving forward in neighbouring annular groove on front side of upper half taper cone barrel and lower half taper cone barrel, under the action of torsional spring, upper semi-circle
Cone cylinder is pivoted upwardly into the top of annular groove, and lower half taper cone barrel rotates down the lower part into annular groove, to play positioning
The effect of device, avoids the occurrence of spray orifice.
By adopting the above technical scheme, the beneficial effects of the present invention are:
(1) the columnar rigid barrier device that the present invention is connected on front side of the 4th partition by torsional spring and hinge, in hole
Wall passes through the annular groove formed after hydraulic slotted liner technique reaming.At sealing of hole initial stage due to polyurethane not solidification, gas pressure in coal seam completely
It when power is larger, is gone out in boring procedure in extraction or pressure-measuring pipe, rigid barrier device is being turned round when moving forward to cylindrical cavity
It under the driving of spring, is entered in annular groove on front side of Circular Rigid barrier device, to limit the 4th partition and extraction or pressure-measuring pipe
Position prevents extraction or pressure-measuring pipe from going out drilling, avoids the casualties and equipment damage that may cause drilling outside
(2) present invention is filled during polyurethane dilatancy hardening by passing through the annular groove formed after hydraulic slotted liner technique in hole
The drilling of full polyurethane.Under the barometric gradient of coal-bed gas, script gas is migrated along the crushed zone straight line of drilling near wall,
The annular groove formed after present hydraulic slotted liner technique has been also filled with polyurethane, and the route of gas migration increases, and frictional resistance increases, and presses
Force gradient is unchanged, to increase the difficulty of gas migration, improves sealing of hole effect.
It is (3) of the invention by being connected in extraction or pressure-measuring pipe in the inner hole of second partition and third partition by guide sleeve,
There is certain frictional force between guide sleeve inner wall and extraction or pressure-measuring pipe outer circle, it is ensured that its leakproofness, and by one
It can be moved along extraction or pressure-measuring pipe after constant-pressure, while the first check valve and being installed on second partition and third partition
Two check valves.Polyurethane is before dilatancy hardening, and there are the air of larger space in hole, and in expansion process, polyurethane will
Air extrusion discharge in closed hole, enters elastic extrusion chamber through the first check valve and second one-way valve, to make to stick together shape
The polyurethane of state can enter in hole-crack of hole wall, adhere to drilling crushed zone coal and rock to form an entirety, block
The channel of Gas Flow, and then improve the sealing of hole effect of hole.
(4) during polyurethane dilatancy hardening, it may appear that a degree of shrinkage phenomenon, by gas injection (or liquid) pipe to bullet
Property extrusion chamber in injection gas or liquid, and increase its internal pressure, drive the guide sleeve of second partition and third partition along taking out
It adopts or pressure-measuring pipe is mobile, and then squeeze the not fully hardened polyurethane in two sides, hole will be generated because of contraction and filled up again, thus
Improve the sealing of hole effect of hole.
(5) present invention by before broadcasting extraction or pressure-measuring pipe, in and rear portion be both provided with partition, extraction or pressure-measuring pipe
Always be placed in the position of center line of hole, during carrying out sealing of hole, avoid extraction or pressure-measuring pipe be located at the edge of hole without
Appearance conducive to sealing of hole, and then the problems such as influence sealing of hole effect, to improve the sealing of hole effect of drilling.
(6) after polyurethane dilatancy hardening, gas or liquid are injected into elastic extrusion chamber by gas injection or liquid pipe, and make it
Internal pressure increases to certain pressure value.The extraction in hole deep or gas near pressure-measuring pipe rear port are under barometric gradient
Migrate, since there are higher pressure at elastic extrusion chamber, and then prevent gas further to the fortune at tunnel
It moves, to improve the sealing of hole effect of hole；Meanwhile gas or liquid inside elastic extrusion chamber filled with certain pressure, at it
In the case where preceding sealing of hole effect failure, the effect of secondary hole sealing can be played, provides alternative scheme to improve the effect of sealing of hole.
(7) present invention is by there is no polyurethane is used, reducing chemical agent during broadcasting extraction or pressure-measuring pipe
Injury to human body and reduce artificial physical work amount, and avoids and can not be carried out since the polyurethane dilatancy hardening time is fast
The disadvantage of longer-distance drilling and sealing.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the present invention before injecting polyurethane；
Fig. 2 is structural schematic diagram of the present invention after injecting polyurethane.
Specific embodiment
As depicted in figs. 1 and 2, the polyurethane sealing aperture apparatus of Underwell anti-injection hole anti-leak of the invention, with the aperture of drilling
It is from the front to the back, including the extraction arranged along the longitudinal direction or pressure-measuring pipe 1, the first filling tube 2, the second note to the direction of bottom hole
First partition 5, the first polyurethane are disposed on expects pipe 3 and gas injection or liquid injection pipe 4, extraction or pressure-measuring pipe 1 from the front to the back
Foam bag 6, second partition 7, third partition 8, the second polyurethane foamed bags 9 and the 4th partition 10, first partition 5 and second partition
The first sealing section 11 is formed between 7, forms elastic extrusion chamber 12 between second partition 7 and third partition 8, third partition 8 and the
The second sealing section 13 is formed between four partitions 10, the first filling tube 2 passes through first partition 5 and connect with the first polyurethane foamed bags 6,
Second filling tube 3 sequentially pass through from the front to the back after first partition 5, second partition 7, third partition 8 with the second polyurethane foamed bags 9
Connection, gas injection or liquid injection pipe 4 are connected to after sequentially passing through first partition 5, second partition 7 from the front to the back with elastic extrusion chamber 12.
First partition 5 and the 4th partition 10 are fixedly connected on extraction or pressure-measuring pipe 1 by fastener 14, second partition
7 and third partition 8 be arranged in extraction or pressure-measuring pipe 1 by guide sleeve 15,15 inner wall of guide sleeve and extraction or 1 outer circle of pressure-measuring pipe it
Between there is certain frictional force, first partition 5, second partition 7, third partition 8 and the 4th partition 10 periphery be equipped with rubber
Sealing ring 16.
Second partition 7 is equipped with can be from the first check valve of the first sealing section 11 one-way flow into elastic extrusion chamber 12
17, third partition 8 is equipped with can be from the second one-way valve 18 of the second sealing section 13 one-way flow into elastic extrusion chamber 12.
4th partition, 10 leading flank is equipped with the rigid barrier device being located in the second sealing section 13；Before rigid barrier device is integrally in
Thin circular cone barrel structure after thick, rigid barrier device includes upper half taper cone barrel 19 and lower half taper cone barrel 20,19 rear end of upper half taper cone barrel
Portion and 20 rear end of lower half taper cone barrel pass through hinge and torsional spring is connected to 10 leading flank of the 4th partition.
The construction method of the polyurethane sealing aperture apparatus of Underwell anti-injection hole anti-leak, includes the following steps,
A, it is first drilled using drilling machine in underground, forms cylindrical hole 21, reuse hydraulic slotted liner technique measure in hole 21
Interior carry out reaming forms at least two annular grooves 22；
B, rigid barrier device is installed to 10 leading flank of the 4th partition, first partition 5, second partition 7, third partition 8 it is inclined
Heart position is opened for passing through the first filling tube 2, the second filling tube 3 and gas injection or the perforation of liquid injection pipe 4, in first partition 5, the
Rubber seal 16 is installed in the periphery of two partitions 7, third partition 8 and the 4th partition 10, in second partition 7 and third partition 8
It is upper that first check valve 17 and second one-way valve 18 are installed respectively；
C, by the 4th partition 10, the second polyurethane foamed bags 9, third partition 8, second partition 7,6 and of the first polyurethane foamed bags
First partition 5 is sequentially arranged at from the front to the back on extraction or pressure-measuring pipe 1；
D, the first filling tube 2, the second filling tube 3 and gas injection or liquid injection pipe 4 are passed through into corresponding perforation, the first filling tube 2 is worn
It is connect by quick plug with the first polyurethane foamed bags 6 after crossing first partition 5, the second filling tube 3 sequentially passes through from the front to the back
It is connect by quick plug with the second polyurethane foamed bags 9 after first partition 5, second partition 7, third partition 8, gas injection or fluid injection
Pipe 4 is connected to after sequentially passing through first partition 5, second partition 7 from the front to the back with elastic extrusion chamber 12, assembles Underwell anti-injection since then
The polyurethane sealing aperture apparatus of hole anti-leak；
E, the polyurethane sealing aperture apparatus of assembled Underwell anti-injection hole anti-leak is extended rearward into hole 21 by the aperture of hole 21
It is interior, stop when first partition 5 enters in hole 21 and rigid barrier device is located in one of 22 rear side of annular groove defeated backward
Send the polyurethane sealing aperture apparatus of Underwell anti-injection hole anti-leak；
F, poly- ammonia is injected into the first sealing section 11 and the second sealing section 13 respectively by the first filling tube 2 and the second filling tube 3
Ester mixed liquor carries out sealing of hole；
G, by gas injection or liquid injection pipe 4 gas injection or fluid injection into elastic extrusion chamber 12, distinguish second partition 7 and third partition 8
Not fully hardened polyurethane is forwardly and rearwardly squeezed, the sealing of hole effect of the first sealing section 11 and the second sealing section 13 is improved；
H, after polyurethane is fully hardened, keep certain pressure in elastic extrusion chamber 12, prevent gas further to lane
The valve at gas injection or liquid pipe front port is closed in migration at road；
I, more than completion all drilling and sealings work, starts the measurement for carrying out coal-bed gas pressure by extraction or pressure-measuring pipe 1
Or the development of gas drainage work.
The detailed process of step f is, by the feed inlet of the first filling tube 2 and the second filling tube 3 respectively and outside hole 21
Polyurethane mixed liquor is delivered to the first polyurethane foamed bags 6 and the second poly- ammonia by material feeding pump by the connection of material feeding pump interface respectively
In ester foaming bag 9, the polyurethane mixed liquor in the first polyurethane foamed bags 6 and the second polyurethane foamed bags 9 is expanded polyurethane
Foaming bag is burst into hole 21, until full of the space in entire first sealing section 11 and the second sealing section 13；Polyurethane
Air in the space at place is squeezed by it, is entered in elastic extrusion chamber 12 by the first check valve 17 and second one-way valve 18,
Enter polyurethane in hole-crack of 21 wall surface of hole, adhere to 21 crushed zone coal and rock of hole to form an entirety, blocks up
Fill in the channel of Gas Flow；Meanwhile the polyurethane of elastic extrusion chamber front and rear sides will push second partition 7 and move backward and third
The forward movement of partition 8 makes elasticity extruding space become smaller；Material feeding closes the valve at two filling tube feed inlets after finishing
It closes.
The detailed process of step g is to connect the import of gas injection or liquid pipe with gas injection or liquid pump, and gas injection or liquid pump will be to bullets
Property squeeze space in injection gas or liquid to certain pressure after, while push second partition 7 move forward and third partition 8
Moving backward, which makes elasticity squeeze space, becomes larger, and second partition 7 and third partition 8 squeeze that front and rear sides are not fully hardened to gather respectively
Urethane is further the compactness for improving the first sealing section 11 and 13 inner urethane of the second sealing section, will be received again because of hardening
The hole of contracting is full of.
Sealing of hole initial stage due to polyurethane not completely solidification, go out in boring procedure in extraction or pressure-measuring pipe 1, in coal seam watt
When this pressure is larger, the gas pressure of 21 bottom of hole pushes whole device to move forward, and sets when on 10 leading flank of the 4th partition
When the front side of the upper half taper cone barrel 19 and lower half taper cone barrel 20 set is moved forward in neighbouring annular groove 22, in the effect of torsional spring
Under, upper half taper cone barrel 19 is pivoted upwardly into the top of annular groove 22, and lower half taper cone barrel 20 is rotated down into annular groove 22
Lower part avoids the occurrence of spray orifice to play the role of positioning device.
The present embodiment not makes any form of restriction shape of the invention, material, structure etc., all according to this hair
Bright technical spirit any simple modification, equivalent change and modification to the above embodiments, belong to the technology of the present invention side
The protection scope of case.
Claims (8)
1. the polyurethane sealing aperture apparatus of Underwell anti-injection hole anti-leak, it is characterised in that: the direction with the aperture of drilling to bottom hole is
Guiding, successively include from the front to the back the extraction arranged along the longitudinal direction or pressure-measuring pipe, the first filling tube, the second filling tube and
Be disposed with from the front to the back on gas injection or liquid injection pipe, extraction or pressure-measuring pipe first partition, the first polyurethane foamed bags, second every
Plate, third partition, the second polyurethane foamed bags and the 4th partition, form the first sealing section between first partition and second partition,
Elastic extrusion chamber is formed between second partition and third partition, and the second sealing section is formed between third partition and the 4th partition, the
One filling tube pass through first partition connect with the first polyurethane foamed bags, the second filling tube sequentially pass through from the front to the back first every
It is connect after plate, second partition, third partition with the second polyurethane foamed bags, gas injection or liquid injection pipe sequentially pass through first from the front to the back
It is connected to after partition, second partition with elastic extrusion chamber.
2. the polyurethane sealing aperture apparatus of Underwell anti-injection hole according to claim 1 anti-leak, it is characterised in that: first partition
Pass through fastener with the 4th partition to be fixedly connected on extraction or pressure-measuring pipe, second partition and third partition are set by guide sleeve
It sets in extraction or pressure-measuring pipe, there is certain frictional force, first partition, the between guide sleeve inner wall and extraction or pressure-measuring pipe outer circle
The periphery of two partitions, third partition and the 4th partition is equipped with rubber seal.
3. the polyurethane sealing aperture apparatus of Underwell anti-injection hole according to claim 2 anti-leak, it is characterised in that: second partition
Being equipped with can be from the first check valve of the first sealing section one-way flow into elastic extrusion chamber, and third partition is equipped with can be by second
The second one-way valve of sealing section one-way flow into elastic extrusion chamber.
4. the polyurethane sealing aperture apparatus of Underwell anti-injection hole according to claim 3 anti-leak, it is characterised in that: the 4th partition
Leading flank is equipped with the rigid barrier device being located in the second sealing section；Thin circular cone barrel structure after rigid barrier device is thick before being integrally in,
Rigid barrier device includes upper half taper cone barrel and lower half taper cone barrel, and upper half taper cone barrel rear end and lower half taper cone barrel rear end pass through
Hinge and torsional spring are connected to the 4th partition leading flank.
5. the construction method of the polyurethane sealing aperture apparatus using Underwell anti-injection hole as claimed in claim 4 anti-leak, feature
It is: includes the following steps,
A, first drilled using drilling machine in underground, form cylindrical hole, reuse hydraulic slotted liner technique measure in hole into
Row reaming forms at least two annular grooves；
B, rigid barrier device is installed to the 4th partition leading flank, first partition, second partition, third partition eccentric position
It opens for passing through the first filling tube, the second filling tube and gas injection or the perforation of liquid injection pipe, in first partition, second partition, the
Rubber seal is installed in the periphery of three partitions and the 4th partition, and it is unidirectional to install first respectively on second partition and third partition
Valve and second one-way valve；
C, by the 4th partition, the second polyurethane foamed bags, third partition, second partition, the first polyurethane foamed bags and first every
Plate is sequentially arranged at from the front to the back on extraction or pressure-measuring pipe；
D, the first filling tube, the second filling tube and gas injection or liquid injection pipe are passed through into corresponding perforation, the first filling tube passes through the
Connect with the first polyurethane foamed bags after one partition by quick plug, the second filling tube sequentially pass through from the front to the back first every
It is connect by quick plug with the second polyurethane foamed bags after plate, second partition, third partition, gas injection or liquid injection pipe are from the front to the back
It is connected to after sequentially passing through first partition, second partition with elastic extrusion chamber, assembles the poly- ammonia of Underwell anti-injection hole anti-leak since then
Ester hole sealing device；
E, the polyurethane sealing aperture apparatus of assembled Underwell anti-injection hole anti-leak is extended rearward into hole by the aperture of hole, when
Stop conveying Underwell anti-injection backward when first partition enters in hole and rigid barrier device is located in one of on rear side of annular groove
The polyurethane sealing aperture apparatus of hole anti-leak；
F, polyurethane mixing is injected into the first sealing section and the second sealing section by the first filling tube and the second filling tube respectively
Liquid carries out sealing of hole；
G, by gas injection or liquid injection pipe gas injection or fluid injection into elastic extrusion chamber, make second partition and third partition respectively forwardly and
Not fully hardened polyurethane is squeezed backward, improves the sealing of hole effect of the first sealing section and the second sealing section；
H, after polyurethane is fully hardened, certain pressure is kept in elastic extrusion chamber, prevent gas further to tunnel
The valve at gas injection or liquid pipe front port is closed in the migration at place；
I, it is more than completion all drilling and sealings work, by extraction or pressure-measuring pipe start carry out coal-bed gas pressure measurement or
The development of gas drainage work.
6. construction method according to claim 5, it is characterised in that: the detailed process of step f is, by the first filling tube and
The feed inlet of second filling tube is connect with the material feeding pump interface outside hole respectively, and polyurethane mixed liquor is defeated respectively by material feeding pump
It send to the first polyurethane foamed bags and the second polyurethane foamed bags, in the first polyurethane foamed bags and the second polyurethane foamed bags
Polyurethane mixed liquor expansion polyurethane foamed bags are burst into hole, until be full of entire first sealing section and the second envelope
Space in hole section；The air in space where polyurethane is squeezed by it, is entered by the first check valve and second one-way valve
In elastic extrusion chamber, enters polyurethane in hole-crack of hole wall, adhere to hole crushed zone coal and rock to form one
A entirety blocks the channel of Gas Flow；Meanwhile the polyurethane of elastic extrusion chamber front and rear sides will push second partition and move back
The forward movement of dynamic and third partition makes elasticity extruding space become smaller；Material feeding finish after by the valve at two filling tube feed inlets
It is closed.
7. construction method according to claim 5, it is characterised in that: the detailed process of step g is, by gas injection or liquid pipe
Import is connect with gas injection or liquid pump, and gas injection or liquid pump will squeeze to elasticity and inject gas or liquid in space to certain pressure
Afterwards, while second partition is pushed to move forward and third partition moves backward makes elasticity squeeze space to become larger, second partition and the
Three partitions squeeze the not fully hardened polyurethane in front and rear sides respectively, are improved in the first sealing section and the second sealing section
The compactness of portion's polyurethane will be full of again because of the hole of curing shrinkage.
8. construction method according to claim 5, it is characterised in that: sealing of hole initial stage due to polyurethane not completely solidification,
When extraction or pressure-measuring pipe are gone out in boring procedure, and gas pressure is larger in coal seam, the gas pressure of hole bottom pushes entire
Device moves forward, and moves forward to neighbour on front side of the upper half taper cone barrel and lower half taper cone barrel being arranged on the 4th partition leading flank
When in close annular groove, under the action of torsional spring, upper half taper cone barrel is pivoted upwardly into the top of annular groove, lower half taper cone barrel to
Under be rotated into the lower part of annular groove, to play the role of positioning device, avoid the occurrence of spray orifice.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910874992.3A CN110513142B (en) | 2019-09-17 | 2019-09-17 | Underground polyurethane hole sealing device capable of preventing spray holes from leakage and construction method thereof |
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| CN201910874992.3A CN110513142B (en) | 2019-09-17 | 2019-09-17 | Underground polyurethane hole sealing device capable of preventing spray holes from leakage and construction method thereof |
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| CN111485936A (en) * | 2020-06-08 | 2020-08-04 | 徐州工程学院 | Hole sealing method for improving gas extraction effect |
| CN116122891A (en) * | 2023-03-01 | 2023-05-16 | 中国矿业大学(北京) | Device and method for improving extraction effect through secondary intelligent hole sealing of gas extraction drilling |
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|---|---|
| CN110513142B (en) | 2024-03-01 |
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