CN103590782A - Under-pressure grouting hole sealing device and method for gas extraction drill air bag blocking - Google Patents
Under-pressure grouting hole sealing device and method for gas extraction drill air bag blocking Download PDFInfo
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- CN103590782A CN103590782A CN201310625390.7A CN201310625390A CN103590782A CN 103590782 A CN103590782 A CN 103590782A CN 201310625390 A CN201310625390 A CN 201310625390A CN 103590782 A CN103590782 A CN 103590782A
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Abstract
The invention relates to an under-pressure grouting and hole sealing device and method for gas extraction drill air bag blocking. The device is characterized in that the device comprises an extraction pipe, a first tip air bag, a second tip air bag, a slurry outlet pipe and a grouting pipe, wherein the extraction pipe is composed of a first extraction pipe body, a second extraction pipe body and a third extraction pipe body, the first extraction pipe body is sleeved with the first tip air bag, a one-way needle valve is arranged on the first tip air bag, the slurry outlet pipe with a one-way check valve arranged inside penetrates through the first tip air bag, the outer end of the slurry outlet pipe is communicated with the grouting pipe, the third extraction pipe body is sleeved with the second tip air bag, a one-way needle valve is arranged on the second tip air bag, the two ends of the second extraction pipe body are connected with one end of the first extraction pipe body and one end of the third extraction pipe body respectively, the tip of the other end of the third extraction pipe body is provided with a plurality of sieve holes which allow gas to inflow, and the first tip air bag and the second tip air bag are filled with expansion agents in advance. The device and the method can be widely applied to permanent hole sealing for coal mine underground gas extraction hole drilling.
Description
Technical field
The present invention relates to a kind of hole sealing device and method of coal mine gas extraction drill hole, particularly about a kind of mash gas pumping drilling air bag shutoff injection hole sealing device with pressure and method.
Background technology
Gas pumping is that one of important channel of control of coalmine gas ，Dan Yin China condition of coal seam occurrence is complicated, and Completion of Drilling Hole condition is undesirable, efficiently, sealing boring is a technical barrier always closely.At present, China's coal bed gas extraction drilling and sealing technology mainly contains the macromolecule organic material sealing of holes such as inorganic material sealing of hole, the polyurethane such as mechanical type hole packer sealing of hole, cement paste and multiple material assemblage zone pressure grouting sealing of hole etc.
Mechanical type hole packer sealing of hole is had relatively high expectations to drilling quality, and the boring of sealing of hole section is necessary smooth and without collapse hole phenomenon, sealing of hole cost is high, recycles and reuses rate low, is only suitable for interim rapid hole sealing.The inorganic material sealing of holes such as cement paste easily form crescent blind area for gentle dip or nearly horizontal drilling, and light water mud solidifies rear easy contraction and generate crack, cause outside air to bleed.The macromolecule organic material sealing of holes such as polyurethane are easy to operate, but black and white material mixing post-foaming solidifies too fast, easily the situation that solidify in boring precalculated position is not sent in generation, and its mechanical property cannot provide enough support forces for boring after solidifying, cause the extraction life-span because hole wall subsides, section shrinkage distortion produces new crack and greatly reduces.Multiple material assemblage zone pressure grouting method for sealing is current main development direction, general by the beautiful organic expanded material such as loose of polyurethane, horse, in two ends shutoff, form confined space, again the inorganic material such as cement paste are injected wherein, make full use of that organic material reaction is fast, expansion multiple is high and inorganic material compressive resistance is high, to the large characteristic of boring supporting power, and can realize injection hole sealing with pressure, but boring innermost end adopts organic material as plug, plug still can occur, and not deliver to precalculated position be the situation that foaming and intumescing causes the not good even useless hole of sealing quality.In addition, the macromolecule organic materials such as polyurethane all have certain toxicity, can cause certain harm to workman is healthy.Therefore, be necessary to provide a kind of and can be applicable to the permanent sealing of hole operation in any sealing of hole of arbitrarily angled mash gas pumping drilling position under coal mine again without injection hole sealing device with pressure and the method for health hazard.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of sealing material of researching and developing by air bag expansion plugging, injection with pressure, realize extraction borehole and the positiver sealing in crack around, the thorough blocking-up air passage that bleeds, can be applicable to a kind of mash gas pumping drilling air bag shutoff injection hole sealing device with pressure and the method for the permanent sealing of hole in arbitrarily angled mash gas pumping drilling any sealing of hole position under coal mine.
For achieving the above object, the present invention takes following technical scheme: a kind of mash gas pumping drilling air bag shutoff injection hole sealing device with pressure, is characterized in that: it comprises drainage tube, the first termination air bag, the second termination air bag, outlet pipe and Grouting Pipe, described drainage tube is by the first drainage tube, the second drainage tube and the 3rd drainage tube form, described the first termination Air sac cover is located on described the first drainage tube, and there is a unidirectional needle-valve on described the first termination air bag, the described outlet pipe that inside is provided with one way stop peturn valve runs through described the first termination air bag, and the outer end of described outlet pipe is communicated with described Grouting Pipe, described the second termination Air sac cover is located on described the 3rd drainage tube, and there is a unidirectional needle-valve on described the second termination air bag, the two ends of described the second drainage tube connect respectively one end of described the first drainage tube and described the 3rd drainage tube, and the end of described the 3rd drainage tube other end is provided with some sieve apertures for flowing into for gas,
In described the first termination air bag and described the second termination air bag, be preinstalled with expansion medicament, described expansion medicament comprises the expansion component being comprised of quicklime 15～25 weight portions and aluminium powder 5～10 weight portions and mixes the regulation and control component being comprised of citric acid 0.3～0.45 weight portion, calcium chloride 0.2～0.3 weight portion, sodium acid carbonate 0.2～0.3 weight portion, polyacrylamide 0.1～0.15 weight portion.
The outer end that described outlet pipe runs through described the first termination air bag is communicated with described Grouting Pipe by the automatic separating joint of a level pressure.
The two ends of described the second drainage tube are respectively by lead to the one end that connects described the first drainage tube and described the 3rd drainage tube always.
Described the first termination air bag and described the second termination air bag annular closed air bag that inside and outside materials at two layers forms of all serving as reasons, inner layer material is rubber, cladding material is screw thread cloth cover.
A method for sealing that adopts described mash gas pumping drilling air bag shutoff injection hole sealing device with pressure, it comprises the following steps: 1) during site operation, construction drill in coal body, pore-forming proposes after drilling tool, the cinder coal dust in boring to be cleaned out; 2) the first termination air bag and the second termination air bag that are preinstalled with expansion medicament are set in respectively on the first drainage tube and the 3rd drainage tube, and by lead to always, receive on the second drainage tube respectively, the end of the 3rd drainage tube is sealed with plug, one Grouting Pipe is communicated with by the automatic separating joint of a level pressure with the outlet pipe of pre-installing on the first termination air bag, by unidirectional needle-valve, respectively to injected water in the first termination air bag and the second termination air bag, then mash gas pumping drilling air bag shutoff injection hole sealing device with pressure is sent into precalculated position in boring; 3) medicament that expands in the first termination air bag and the second termination air bag reacts with water and impels air bag to expand to reach after predetermined pressure, by Grouting Pipe and outlet pipe, hole-sealing grouting material is injected by the first termination gasbag ektexine, borehole wall, the second extraction outer wall and the formed annular sealed space of the second termination gasbag ektexine, grouting pressure is after reaching predetermined pressure, Grouting Pipe is automatically separated at the automatic separating joint of level pressure place with outlet pipe, and drainage tube, the first termination air bag, the second termination air bag, outlet pipe and straight-through all staying complete drilling and sealing in boring.
Described step 2), in, in the first termination air bag and the second termination air bag, the expansion medicament of prepackage comprises the expansion component being comprised of quicklime 15～25 weight portions and aluminium powder 5～10 weight portions and the regulation and control component being comprised of citric acid 0.3～0.45 weight portion, calcium chloride 0.2～0.3 weight portion, sodium acid carbonate 0.2～0.3 weight portion, polyacrylamide 0.1～0.15 weight portion.
Described step 2), in, in the first termination air bag and the second termination air bag, distinguish injected water 200～300 weight portions.
The present invention is owing to taking above technical scheme, it has the following advantages: 1, the present invention realizes the desirable seal to sealing of hole section two ends by the efficient expansion of termination air bag, forms the annular sealed space being surrounded by termination gasbag ektexine, borehole wall, drainage tube outer wall; And be connected hole-sealing grouting material is injected to above-mentioned annular sealed space with the outlet pipe arranging on the air bag of termination by Grouting Pipe, after hole-sealing grouting material solidification, can form the powerful supporting to sealing of hole section drill hole wall, finally greatly improve drilling and sealing tightness, effectively prevent extraction later stage boring crack that creep produces.Drainage tube end is sealed with plug, and the sieve aperture that gas can only arrange by drainage tube afterbody end flows into drainage tube, effectively prevents that the foreign material such as cinder from entering obstruction extraction pipeline, finally significantly improves extracting result.The present invention without specific (special) requirements, therefore can be applicable to the permanent sealing of hole of any sealing of hole of arbitrarily angled mash gas pumping drilling position under coal mine to the required boring of carrying out sealing of hole operation.2, the present invention arranges two termination air bags at hole-sealing grouting section two ends, and in the air bag of termination, insert in advance expansion medicament, in hole sealing device being sent into boring forward direction air bag, inject certain water gaging, expansion medicament in the air bag of termination reacts with water, the gas producing impels the regularly efficient expansion of level pressure of termination air bag, the macromolecule organic material foaming and intumescings such as polyurethane can effectively be solved fast, send problem not in place, and air bag expansion medicament is by quicklime 15～25 weight portions, aluminium powder 5～10 weight portions, citric acid 0.3～0.45 weight portion, calcium chloride 0.2～0.3 weight portion, sodium acid carbonate 0.2～0.3 weight portion, polyacrylamide 0.1～0.15 weight portion forms, material formulation is raw materials used is commercially available conventional material, nontoxic and with low cost.The present invention can be widely used in the permanent sealing of hole of coal mine gas extraction borehole.
Accompanying drawing explanation
Fig. 1 is the application state schematic diagram of apparatus of the present invention
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1, apparatus of the present invention comprise drainage tube 1, the first termination air bag 2, the second termination air bag 3, outlet pipe 4, Grouting Pipe 5 and straight-through 6.
Drainage tube 1 is comprised of the first drainage tube 7, the second drainage tube 8 and the 3rd drainage tube 9, the first termination air bag 2 is set on the first drainage tube 7, and on the first termination air bag 2, there is a unidirectional needle-valve 10, the outlet pipe 4 that inside is provided with one way stop peturn valve (not shown) runs through the first termination air bag 2, and the outer end of outlet pipe 4 is communicated with Grouting Pipe 5 by the automatic separating joint 11 of a level pressure.The second termination air bag 3 is set on the 3rd drainage tube 9, and on the second termination air bag 3, also has a unidirectional needle-valve 10.The two ends of the second drainage tube 8 are respectively by one end of straight-through 6 connection first drainage tubes 7 and the 3rd drainage tube 9, and the end of the 3rd drainage tube 9 other ends is provided with some sieve apertures 12 for flowing into for gas.Straight-through 6 is those skilled in the art's common components, therefore no longer describe in detail.
The first termination air bag 2 and the second termination air bag 3 annular closed air bag that inside and outside materials at two layers forms of all serving as reasons, inner layer material is made by the good top-quality rubber of tightness, and cladding material is the screw thread cloth cover with certain ductility.In the first termination air bag 2 and the second termination air bag 3, add in advance expansion medicament, expansion medicament is that the expansion component being comprised of quicklime 15～25 weight portions and aluminium powder 5～10 weight portions and the regulation and control component being comprised of citric acid 0.3～0.45 weight portion, calcium chloride 0.2～0.3 weight portion, sodium acid carbonate 0.2～0.3 weight portion, polyacrylamide 0.1～0.15 weight portion mix.
Adopt the method for sealing of apparatus of the present invention to comprise the following steps:
1) during site operation, construction drill in coal body 13, pore-forming proposes after drilling tool, the cinder coal dust in boring 14 to be cleaned out;
2) the first termination air bag 2 and the second termination air bag 3 are set in respectively on the first drainage tube 7 and the 3rd drainage tube 9, and by straight-through 6, be connected to according on the second drainage tube 8 of actual sealing of hole parameter (comprising hole sealing depth and sealed borehole length) designated length respectively, the end of the 3rd drainage tube 9 is sealed with plug, so that when apparatus of the present invention are put into boring 14 and carry out extraction operation, the foreign material such as cinder cannot enter the extraction system of stopping up by drainage tube, Gas-Flow can only flow into drainage tube 1 by sieve aperture 12, one Grouting Pipe 5 is communicated with by the automatic separating joint 11 of level pressure with the outlet pipe 4 of prepackage on the first termination air bag 2, by unidirectional needle-valve 10 respectively to injected water 200～300 weight portions in the first termination air bag 2 and the second termination air bag 3, then apparatus of the present invention are sent into precalculated position in boring 14,
3) medicament that expands in the first termination air bag 2 and the second termination air bag 3 impels air bag expansion to reach (pressure condition is known according to the amount of the first termination air bag 2 and interior the added expansion medicament of the second termination air bag 3) after certain pressure for react with water, by Grouting Pipe 5, outlet pipe 4 injects hole-sealing grouting material by the first termination air bag 2 outer walls, 14 hole walls of holing, in the second drainage tube 8 outer walls and the formed annular sealed space of the second termination air bag 3 outer wall, until reaching (predetermined pressure is that the required grouting pressure of sealing of hole through calculating is determined) after predetermined pressure in annular sealed space, Grouting Pipe 5 is automatically separated at the automatic separating joint of level pressure 11 places with outlet pipe 4, in apparatus of the present invention, drainage tube 1, the first termination air bag 2, the second termination air bag 3, outlet pipe 4 and straight-through 6 is all stayed in boring 14 and is completed sealing of hole, finally clean grouting equipment and scene, for sealing of hole is ready next time.
The various embodiments described above are only for illustrating the present invention; wherein the structure of each parts, connected mode and manufacture craft etc. all can change to some extent; every equivalents of carrying out on the basis of technical solution of the present invention and improvement, all should not get rid of outside protection scope of the present invention.
Claims (9)
1. a mash gas pumping drilling air bag shutoff injection hole sealing device with pressure, is characterized in that: it comprises drainage tube, the first termination air bag, the second termination air bag, outlet pipe and Grouting Pipe;
Described drainage tube is by the first drainage tube, the second drainage tube and the 3rd drainage tube form, described the first termination Air sac cover is located on described the first drainage tube, and there is a unidirectional needle-valve on described the first termination air bag, the described outlet pipe that inside is provided with one way stop peturn valve runs through described the first termination air bag, and the outer end of described outlet pipe is communicated with described Grouting Pipe, described the second termination Air sac cover is located on described the 3rd drainage tube, and there is a unidirectional needle-valve on described the second termination air bag, the two ends of described the second drainage tube connect respectively one end of described the first drainage tube and described the 3rd drainage tube, and the end of described the 3rd drainage tube other end is provided with some sieve apertures for flowing into for gas,
In described the first termination air bag and described the second termination air bag, be preinstalled with expansion medicament, described expansion medicament comprises the expansion component being comprised of quicklime 15～25 weight portions and aluminium powder 5～10 weight portions and mixes the regulation and control component being comprised of citric acid 0.3～0.45 weight portion, calcium chloride 0.2～0.3 weight portion, sodium acid carbonate 0.2～0.3 weight portion, polyacrylamide 0.1～0.15 weight portion.
2. a kind of mash gas pumping drilling air bag as claimed in claim 1 shutoff injection hole sealing device with pressure, is characterized in that: the outer end that described outlet pipe runs through described the first termination air bag is communicated with described Grouting Pipe by the automatic separating joint of a level pressure.
3. a kind of mash gas pumping drilling air bag as claimed in claim 1 shutoff injection hole sealing device with pressure, is characterized in that: the two ends of described the second drainage tube are respectively by lead to the one end that connects described the first drainage tube and described the 3rd drainage tube always.
4. a kind of mash gas pumping drilling air bag as claimed in claim 2 shutoff injection hole sealing device with pressure, is characterized in that: the two ends of described the second drainage tube are respectively by lead to the one end that connects described the first drainage tube and described the 3rd drainage tube always.
5. a kind of mash gas pumping drilling air bag shutoff injection hole sealing device with pressure as claimed in claim 1 or 2 or 3 or 4, it is characterized in that: described the first termination air bag and described the second termination air bag annular closed air bag that inside and outside materials at two layers forms of all serving as reasons, inner layer material is rubber, and cladding material is screw thread cloth cover.
6. a method for sealing for the mash gas pumping drilling air bag shutoff with pressure injection hole sealing device of employing as described in claim 1～5 any one, it comprises the following steps:
1) during site operation, construction drill in coal body, pore-forming proposes after drilling tool, the cinder coal dust in boring to be cleaned out;
2) the first termination air bag and the second termination air bag that are preinstalled with expansion medicament are set in respectively on the first drainage tube and the 3rd drainage tube, and by lead to always, receive on the second drainage tube respectively, the end of the 3rd drainage tube is sealed with plug, one Grouting Pipe is communicated with by the automatic separating joint of a level pressure with the outlet pipe of pre-installing on the first termination air bag, by unidirectional needle-valve, respectively to injected water in the first termination air bag and the second termination air bag, then mash gas pumping drilling air bag shutoff injection hole sealing device with pressure is sent into precalculated position in boring;
3) medicament that expands in the first termination air bag and the second termination air bag reacts with water and impels air bag to expand to reach after predetermined pressure, by Grouting Pipe and outlet pipe, hole-sealing grouting material is injected by the first termination gasbag ektexine, borehole wall, the second extraction outer wall and the formed annular sealed space of the second termination gasbag ektexine, grouting pressure is after reaching predetermined pressure, Grouting Pipe is automatically separated at the automatic separating joint of level pressure place with outlet pipe, and drainage tube, the first termination air bag, the second termination air bag, outlet pipe and straight-through all staying complete drilling and sealing in boring.
7. a kind of mash gas pumping drilling air bag as claimed in claim 6 shutoff slip-casting hole-sealing method with pressure, it is characterized in that: described step 2), in the first termination air bag and the second termination air bag, the expansion medicament of prepackage comprises the expansion component being comprised of quicklime 15～25 weight portions and aluminium powder 5～10 weight portions and the regulation and control component being comprised of citric acid 0.3～0.45 weight portion, calcium chloride 0.2～0.3 weight portion, sodium acid carbonate 0.2～0.3 weight portion, polyacrylamide 0.1～0.15 weight portion.
8. a kind of mash gas pumping drilling air bag as claimed in claim 6 shutoff slip-casting hole-sealing method with pressure, is characterized in that: described step 2), in the first termination air bag and the second termination air bag, distinguish injected water 200～300 weight portions.
9. a kind of mash gas pumping drilling air bag as claimed in claim 7 shutoff slip-casting hole-sealing method with pressure, is characterized in that: described step 2), in the first termination air bag and the second termination air bag, distinguish injected water 200～300 weight portions.
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