CN101050696A - Bag type paste injection hole sealing device and its hole sealing method - Google Patents
Bag type paste injection hole sealing device and its hole sealing method Download PDFInfo
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Abstract
The present invention relates to a bag type paste-injecting hole-sealing equipment and its hole-sealing method. Said bag type paste-injecting hole-sealing equipment includes the following several portions: bag, internal end supporting component, middle portion supporting component, external end supporting component, paste injection control valve, reverse check valve and pressure control pin. Besides, said invention also provides the concrete steps of said hole-sealing method.
Description
Technical field
The present invention relates to the hole sealing device and the method for sealing of coal mine gas extraction borehole, especially adapt to the permanent sealing of hole of this coal bed drilling under the coal mine.
Background technology
Generally at 30 meters to hundreds of meters, sealing of hole is carried out in a certain section boring of the aperture certain distance of only adjusting the distance to the down-hole extraction borehole degree of depth, can not adopt the method for direct slip casting to carry out sealing of hole, and the sealing of hole of coal mine gas extraction borehole divides permanent sealing of hole and provisional sealing of hole.At present, the permanent sealing of hole of known coal-bed gas extraction borehole is as sealing material with polyurathamc, foam cement and other expanded material, early stage " cement seaming aperture apparatus " (ZL90227075.3) no longer adopts, the well cementing method of pore sealing also seldom adopts the domestic blown polyurethane materials sealing of hole that generally adopts at present because of operating inconvenience.At present, the provisional sealing of hole of known coal-face firedamp taking-out discharging drilling adopts reusable mechanical hole sealing device sealing of hole, as " fire damp extraction air filling type capsule bag hole packer " (ZL94209078.0), gum cover expansion type " coal rock layer drilling and sealing device " (ZL200420010782.9) etc.
Down-hole drilling will be deformed and destroy by the influence of geostatic stress, the intensity of expanded material such as polyurathamc, foam cement is very low and compressible amount is very big, the deformation failure of keyhole effectively, make the boring of sealing of hole section produce a large amount of crack leakage paths on every side, influence the concentration and the extraction effect of gas pumping.The gas leak phenomenon of the mechanical method of pore sealing that provisional sealing of hole adopted is even more serious, but because extraction time weak point (a few hours) is not generally done too high requirement.
Summary of the invention
In order to overcome the defective that existing expanded material method of pore sealing exists, prevent or reduce the generation and the development in the crack that leaks gas around the sealing of hole section boring, the object of the present invention is to provide and a kind ofly can realize that to sealing of hole section boring implements the bag type paste injection hole sealing device and the method for sealing thereof of effective injection hole sealing.
For achieving the above object, the present invention adopts following technical scheme: a kind of bag type paste injection hole sealing device, the extraction pipe that comprises the capsule bag and from the capsule bag, pass, capsule bag two ends are fixed on the extraction pipe, described capsule bag is provided with exhaust plant, hoop has the expansion gate ring at the middle part of capsule bag, and the expansion gate ring is provided with the pulp control valve, and capsule bag outer end links to each other with the Grouting Pipe jack by non retern valve.
Elastic thin-wall material or expanded rubber pipe that described capsule bag adopts sleeve cloth and rubber, latex to be composited, described exhaust plant is the micropore of capsule bag surface puncture, the inner end of capsule bag and outer end are separately fixed on the inner end supporting piece and outer end support member that installs on the extraction pipe, described non retern valve and Grouting Pipe jack all are positioned on the support member of outer end, and described expansion gate ring is the middle part support member of internal diameter greater than the extraction external diameter of pipe.
Described middle part support member penetrates capsule bag inside, and described pulp control valve is positioned at the middle part of middle part support member, and the capsule bag on pulp control valve both sides is tied up and is fixed on the support member of middle part.
Connect for convenience flexibly, on the described inner end supporting piece perpendicular to the extraction tubular axis to having pin hole, the Grouting Pipe jack on the support member of described outer end is parallel to extraction tubular axis line, is axially arranged with pressure control pin perpendicular to the Grouting Pipe jack on the support member of outer end.
Described capsule bag can have a plurality of, and polyphone is fixed on the described extraction pipe.
Adopt described bag type paste injection hole sealing device to carry out the method for sealing of hole, operate as follows: the first step, bag type paste injection hole sealing device is set on the gas pumping pipe, in the pin hole of inner end supporting piece, penetrate pin, impact pin with hand hammer, bag type paste injection hole sealing device and gas pumping pipe are connected as a single entity; Second step, Grouting Pipe is inserted Grouting Pipe jack on the support member of outer end, utilize pressure control pin that Grouting Pipe and outer end support member are connected as a single entity, promptly be connected as a single entity with bag type paste injection hole sealing device; The 3rd goes on foot, and gas pumping pipe, Grouting Pipe is sent into the set depth of boring together with bag type paste injection hole sealing device; The 4th step, prepare injecting paste material and also begin slip casting, Grouting Pipe breaks away from automatically when reaching the grouting pressure of setting, under the individual cases, Grouting Pipe does not still break away from when reaching grouting pressure, can manually provide pulling force to force Grouting Pipe and bag type paste injection hole sealing device to break away to Grouting Pipe; The 5th step, Grouting Pipe and grouting pump are cleaned, use in order to next injection hole sealing.
Bag type paste injection hole sealing device provided by the invention is minimum to contain a capsule bag, the capsule bag fills the slurry back and expands sealing of hole section borehole sealing, after the slurries pressure in the capsule bag reaches certain pressure, the pulp control valve at capsule bag middle part is opened, under the effect of grouting pump pressure, force slurries filling sealing of hole section boring crack on every side, after grouting pressure reached the setting grouting pressure, Grouting Pipe and hole sealing device broke away from automatically.Adopt technical solutions according to the invention, utilize the crack of slurries filling sealing of hole section borehole circumference on the one hand, boring applies powerful supporting initiatively to the late expansion that utilizes injecting paste material on the other hand to the sealing of hole section, produce the region of high stress around making the boring of sealing of hole section, reduce the gas permeability of coal body around the boring of sealing of hole section, realized that to sealing of hole section boring carries out the purpose of effective injection hole sealing.
Description of drawings
Figure 1 shows that a kind of embodiment figure of the present invention;
Figure 2 shows that second kind of embodiment figure of the present invention;
Figure 3 shows that the third embodiment figure of the present invention;
Figure 4 shows that the alternative of pressure-control valve among Fig. 1,2,3.
The specific embodiment
Example 1
As shown in Figure 1, the extraction pipe 9 that this bag type paste injection hole sealing device comprises capsule bag 1 and passes from capsule bag 1 is coated with inner end supporting piece 2 and outer end support member 4 on the extraction pipe 9.Capsule bag 1 adopts sleeve cloth (screw thread cloth) and the elastic thin-wall material that rubber, latex or other elastomeric material are composited to make, also can replace with existing expanded rubber pipe on the market, rubber makes capsule bag 1 have sealing performance, screw thread cloth makes capsule bag 1 have the performance of better anti-stretch-draw, can be at additional separately one or more layers screw thread cloth in the outside of capsule bag 1 to increase the anti-stretch-draw ability of capsule bag 1.One end of capsule bag 1 is fixed on the inner end supporting piece 2, and the other end of capsule bag 1 is fixed on the outer end support member 4, and the middle part of capsule bag 1 is fixed on the support member 3 of middle part, can be adhesively fixed with glue, also can be with tying up or the method for lock ring is fixed.Middle part support member 3 internal diameters are greater than the external diameter of extraction pipe 9, and the middle part of middle part support member 3 is provided with pulp control valve 5.When middle part support member 3 is longer capsule bag 1 can be divided into two sections fixing, capsule bag 1 can be one, also can be a plurality of series connection, the corresponding quantity of middle part support member 3 and the quantity of pulp control valve 5 of increasing during more than 1 series connection of capsule bag.The leave a blank method for exhausting of gas of capsule bag 1 internal memory adopts the method for puncture micropore to realize that air can be discharged through micropore, and injecting paste material can not pass through from micropore because of containing particulate material.The air that retains in the capsule bag 1 also can adopt in the method exhaust that outlet valve is installed on the utricule or on the support member.Inner end supporting piece 2, middle part support member 3, outer end support member 4 can be made of low-cost plastic production or refinforced cement, and middle part support member 3 can also be made of thin-wall steel tube.Axially be provided with pin-and-hole 8 perpendicular to extraction pipe 9 on the inner end supporting piece 2, in pin-and-hole 8, hammer into pin bag type paste hole sealing device and gas pumping pipe 9 are connected as a single entity.The pulp control valve of installing on the support member 3 of middle part 5 is steel ball and spring formula pressure check valve, the effect of pulp control valve 5 is the minimum pulp pressure of slurries pulp outside capsule bag 1 in the control capsule bag 1, and assurance pulp control valve 5 pulps capsule bag before can fully expand and contact drill hole wall.Capsule bag 1 fills slurry and expands, the capsule internal memory micropore that gas punctures from cyst wall of leaving a blank is discharged, and after capsule bag 1 was full of slurries and can stops up boring 11, pulp control valve 5 was opened automatically, slurries form hole wall and ooze slurry district 12 through coal body 16 slip castings of pulp control valve 5 around boring 11.Pulp control valve 5 can also replace with the pulp gate ring among Fig. 4 15, can pulp under certain pressure as long as can guarantee.As shown in Figure 4, at a plurality of slurry outlets 14 of radially offering of middle part support member 3, pressure gate ring 15 covers slurry outlet 14, and pressure gate ring 15 is elastic rubber rings, utilizes the pretightning force of pressure gate ring 15 to control pulp pressure.The non retern valve 6 that communicates with capsule bag 1 is installed on the outer end support member 4, and non retern valve 6 can be a spring steel ball formula one way valve, also can be valve core type one way valve, as long as realize that slurries can advance and can not go out.Also be provided with the jack of Grouting Pipe 10 on the outer end support member 4, the Grouting Pipe jack is parallel to extraction pipe 9 axis, the outer end grafting Grouting Pipe 10 of the jack of Grouting Pipe 10, Grouting Pipe 10 is connected as a single entity with outer end support member 4 by pressure control pin 7, reach the grouting pressure of setting when grouting pressure after, pressure control pin 7 can be cut off automatically, and pressure control pin 7 is cut off grouting behind shaft or drift lining pipe 10 and broken away from outer end support member 4.Plastic production is made or easily cut off to pressure control pin 7 by easily cutting off metal.Be provided with sealing ring between inner end supporting piece 2, outer end support member 4 and the gas pumping pipe 9, also can in advance inner end supporting piece 2, outer end support member 4 be bonded together with gas pumping pipe 9.The optional cement injection material of injecting paste material, high water injecting paste material or other material injecting paste material.
Carry out the method for sealing of hole with bag type paste injection hole sealing device as mentioned above, operate as follows:
After boring 11 constructions finish, can in distance boring 11 aperture certain distances, implement sealing of hole, the difference of factors such as base area stress intensity, coal seam intensity, the distance in sealing of hole segment distance aperture generally between 8～15 meters, can adjust according to the down-hole actual conditions by the sealing of hole segment length.The method step of sealing of hole is: the first step, bag type paste injection hole sealing device is set on the gas pumping pipe 9, and in the pin hole 8 of inner end supporting piece 2, penetrate pin, impact pin with hand hammer, bag type paste injection hole sealing device and gas pumping pipe 9 are connected as a single entity; Second step, with the Grouting Pipe jack that Grouting Pipe 10 is inserted on the outer end support member 4, utilize pressure control pin 7 that Grouting Pipe 10 and outer end support member 4 are connected as a single entity, promptly be connected as a single entity with bag type paste injection hole sealing device; The 3rd goes on foot, and gas pumping pipe 9, Grouting Pipe 10 is sent into the set depth of boring 11 together with bag type paste injection hole sealing device; The 4th step, prepare injecting paste material and also begin slip casting, Grouting Pipe 10 breaks away from automatically when reaching the grouting pressure of setting, under the individual cases, Grouting Pipe 10 does not still break away from when reaching grouting pressure, provides pulling force to force Grouting Pipe 10 and bag type paste injection hole sealing device to break away from can manually for Grouting Pipe 10; The 5th step, Grouting Pipe 10 and grouting pump are cleaned, use in order to next injection hole sealing.With gas pumping pipe 9 and branch's extraction pipe connection, implement gas pumping at last.
Example 2
As shown in Figure 2, present embodiment and embodiment 1 basically identical shown in Figure 1, difference is that middle part support member 3 shown in Figure 2 no longer is plastics or metalwork, but at capsule bag 1 middle part a compound expansion gate ring 4 that expands in control capsule bag 1 middle part, expansion gate ring 4 is flexible sleeves of making of fiber, the dilatancy of expansion gate ring 4 is less than the dilatancy of capsule bag 1, and expansion gate ring 4 is bonded in the expansion that is used for controlling capsule bag 1 on the capsule bag 1, and pulp control valve 5 is installed on the expansion gate ring 4.The method step of sealing of hole is with embodiment 1.
Example 3
As shown in Figure 3, present embodiment and embodiment 1 basically identical shown in Figure 1, difference is that inner end supporting piece 2, middle part support member 3 and outer end support member 4 are connected as a single entity by mull technique or spiral marking connection method etc., middle part support member 3 penetrates capsule bag inside, two ends are connected with outer end support member 4 with inner end supporting piece 2 respectively, radially all have grout outlet 13 on the middle part support member 3 that capsule bag 1 covers.Support member 3 two ends, middle part also can and inner end supporting piece 2 and 4 of outer end support members reserve the gap and form grout outlet.The method step of sealing of hole is with embodiment 1.The cost of the present embodiment is higher than embodiment 1 and embodiment 2, but can reduce the axial stretching force of capsule bag 1, has certain superiority under the situation that grouting pressure is had relatively high expectations.
Claims (6)
1, a kind of bag type paste injection hole sealing device, the extraction pipe that comprises the capsule bag and from the capsule bag, pass, capsule bag two ends are fixed on the extraction pipe, it is characterized in that: described capsule bag is provided with exhaust plant, hoop has the expansion gate ring at the middle part of capsule bag, the expansion gate ring is provided with the pulp control valve, and capsule bag outer end links to each other with the Grouting Pipe jack by non retern valve.
2, bag type paste injection hole sealing device as claimed in claim 1, it is characterized in that: elastic thin-wall material or expanded rubber pipe that described capsule bag adopts sleeve cloth and rubber, latex to be composited, described exhaust plant is the micropore of capsule bag surface puncture, the inner end of capsule bag and outer end are separately fixed on the inner end supporting piece and outer end support member that installs on the extraction pipe, described non retern valve and Grouting Pipe jack all are positioned on the support member of outer end, and described expansion gate ring is the middle part support member of internal diameter greater than the extraction external diameter of pipe.
3, bag type paste injection hole sealing device as claimed in claim 2 is characterized in that: described middle part support member penetrates capsule bag inside, and described pulp control valve is positioned at the middle part of middle part support member, and the capsule bag on pulp control valve both sides is tied up and is fixed on the support member of middle part.
4, bag type paste injection hole sealing device as claimed in claim 3, it is characterized in that: on the described inner end supporting piece perpendicular to the extraction tubular axis to having pin hole, Grouting Pipe jack on the support member of described outer end is parallel to extraction tubular axis line, is axially arranged with pressure control pin perpendicular to the Grouting Pipe jack on the support member of outer end.
5, as the arbitrary described bag type paste injection hole sealing device of claim 1 to 4, it is characterized in that: described capsule bag can have a plurality of, and polyphone is fixed on the described extraction pipe.
6, adopt the described bag type paste injection hole sealing device of claim 5 to carry out the method for sealing of hole, it is characterized in that carrying out as follows: the first step, bag type paste injection hole sealing device is set on the gas pumping pipe, in the pin hole of inner end supporting piece, penetrate pin, impact pin with hand hammer, bag type paste injection hole sealing device and gas pumping pipe are connected as a single entity; Second step, Grouting Pipe is inserted Grouting Pipe jack on the support member of outer end, utilize pressure control pin that Grouting Pipe and outer end support member are connected as a single entity, promptly be connected as a single entity with bag type paste injection hole sealing device; The 3rd goes on foot, and gas pumping pipe, Grouting Pipe is sent into the set depth of boring together with bag type paste injection hole sealing device; The 4th step, prepare injecting paste material and also begin slip casting, Grouting Pipe breaks away from automatically when reaching the grouting pressure of setting, under the individual cases, Grouting Pipe does not still break away from when reaching grouting pressure, can manually provide pulling force to force Grouting Pipe and bag type paste injection hole sealing device to break away to Grouting Pipe; The 5th step, Grouting Pipe and grouting pump are cleaned, use in order to next injection hole sealing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710054384A CN101050696B (en) | 2007-05-10 | 2007-05-10 | Bag type paste injection hole sealing device and its hole sealing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710054384A CN101050696B (en) | 2007-05-10 | 2007-05-10 | Bag type paste injection hole sealing device and its hole sealing method |
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| CN101050696A true CN101050696A (en) | 2007-10-10 |
| CN101050696B CN101050696B (en) | 2010-05-19 |
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| CN200710054384A Expired - Fee Related CN101050696B (en) | 2007-05-10 | 2007-05-10 | Bag type paste injection hole sealing device and its hole sealing method |
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| US4072015A (en) * | 1976-12-30 | 1978-02-07 | The United States Of America As Represented By The Secretary Of The Interior | Borehole aerostatic ground support system |
| US4474409A (en) * | 1982-09-09 | 1984-10-02 | The United States Of America As Represented By The Secretary Of The Interior | Method of enhancing the removal of methane gas and associated fluids from mine boreholes |
| CN2193428Y (en) * | 1994-04-22 | 1995-03-29 | 河南省煤炭科学研究所 | Aerated capsule hole sealing device for mine gas ventilation |
| CN1884790A (en) * | 2006-07-06 | 2006-12-27 | 宋彦波 | Grouting sealing method and apparatus for borehole and conductor pipe for water prospection of mine |
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