CN111927528A - Self-adaptive dynamic hole sealing system and hole sealing method thereof - Google Patents
Self-adaptive dynamic hole sealing system and hole sealing method thereof Download PDFInfo
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- CN111927528A CN111927528A CN202010930106.7A CN202010930106A CN111927528A CN 111927528 A CN111927528 A CN 111927528A CN 202010930106 A CN202010930106 A CN 202010930106A CN 111927528 A CN111927528 A CN 111927528A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention discloses a self-adaptive dynamic hole sealing system and a hole sealing method thereof, and belongs to the technical field of coal seam gas extraction. The invention solves the problem of poor sealing and air leakage at the later stage caused by mining disturbance in the prior art. The self-adaptive dynamic hole sealing system comprises a self-adaptive hole sealing capsule, an automatic slurry supplementing device and a viscous liquid material. The self-adaptive hole sealing capsule can continue to inject liquid or discharge liquid at any time after being filled with slurry and expanded, and the automatic slurry supplementing device can automatically supplement slurry according to the change of pressure in the hole sealing section. By adopting the technical scheme, on one hand, the self-adaptive hole sealing capsule can automatically expand to ensure the sealing effect when the hole is broken in the drilled hole, and on the other hand, the viscous liquid material can continuously seal the hole sealing section after the hole sealing section has cracks under the influence of mining disturbance, so that the air permeability of the coal seam around the drilled hole is reduced, and the self-adaptive dynamic hole sealing is realized. The self-adaptive dynamic hole sealing system is high in automation degree, small in man-made interference factor, good in hole sealing effect and simple in hole sealing method operation.
Description
Technical Field
The invention belongs to the field of mine gas control, and particularly relates to a self-adaptive dynamic hole sealing system and a hole sealing method thereof.
Background
The gas disaster is one of five major disasters of coal mine production, the gas extraction is the most common and effective means in the gas disaster treatment, and the sealing effect of the gas extraction drill hole directly influences the gas extraction efficiency, so that the improvement of the hole sealing quality of the drill hole in the gas extraction process has important significance for improving the gas extraction effect.
At present, a method of two-plugging and one-injecting is commonly adopted for sealing the drill hole in China, and the hole sealing is carried out through polyurethane or cement paste, so that after the hole sealing is finished, the hole sealing section of the drill hole is influenced by mining disturbance, the drill hole is broken or cracks develop to form a gas leakage channel, the extraction effect is greatly reduced, and if the gas leakage occurs, secondary hole sealing is needed, the operation is complicated, and the hole sealing cost is high. Therefore, in order to improve the hole sealing effect during coal seam gas extraction, reduce the hole sealing cost and reduce the manual workload, a set of self-adaptive dynamic hole sealing device needs to be established urgently.
Disclosure of Invention
The invention aims to provide a self-adaptive dynamic hole sealing system and a hole sealing method thereof, which are used for solving the problem of untight hole sealing in the prior art. The device is particularly suitable for the existing gas extraction and pressure measurement hole sealing, and can realize automatic slurry supplement through manually set slurry supplement pressure after the initial hole sealing is finished. The self-adaptive dynamic hole sealing system mainly solves the technical problem of realizing real-time dynamic slurry supplementing hole sealing.
The invention is realized by adopting the following technical scheme:
a self-adaptive dynamic hole sealing system comprises a self-adaptive hole sealing capsule and an automatic slurry supplementing device; wherein the content of the first and second substances,
the self-adaptive hole sealing capsule comprises a front hole sealing capsule, a rear hole sealing capsule and a high-pressure hose; the preposed hole sealing capsule comprises a first capsule grouting pipe, a first capsule body and a first extraction pipe; the rear hole sealing capsule comprises a second capsule grouting pipe, a second capsule body, a second extraction pipe, a hole sealing section grouting pipe and a slurry return pipe;
the automatic slurry supplementing device comprises a first slurry storage tank, a second slurry storage tank and a pneumatic adding device, wherein a first slurry outlet and a first slurry supplementing port are formed in the first slurry storage tank; the first supercharging outlet and the second supercharging outlet are respectively communicated to the first slurry storage tank and the second slurry storage tank;
when the device is in use, a first capsule body in the preposed hole sealing capsule is sleeved on the first extraction pipe, two ends of the first capsule body are fastened, and an outlet of the first capsule grouting pipe penetrates through an opening of the first extraction pipe and is communicated between the first capsule body and the first extraction pipe; a second capsule body of the rear hole sealing capsule is sleeved on a second extraction pipe, two ends of the second capsule body are fastened, a second capsule grouting pipe, a hole sealing section grouting pipe and a slurry return pipe all penetrate through the second extraction pipe, two second capsule grouting pipes are arranged, a first outlet is communicated between the second capsule body and the second extraction pipe, a second outlet is communicated to an inlet of the second capsule grouting pipe through a high-pressure hose, and the first extraction pipe is communicated with the second extraction pipe through a third extraction pipe; the inlet of a second capsule grouting pipe of the rear hole sealing capsule is connected with the first slurry outlet of the automatic slurry supplementing device, and the inlet of a grouting pipe of the hole sealing section is connected with the second slurry outlet.
The invention has the further improvement that the second capsule grouting pipe, the hole sealing section grouting pipe and the slurry return pipe are respectively provided with a first valve, a second valve and a third valve, and grouting operation is carried out by opening and closing the valves.
The invention has the further improvement that the openings of the first capsule grouting pipe and the first extraction pipe are subjected to thermoplastic sealing treatment to prevent air leakage and liquid leakage;
and the openings of the second capsule grouting pipe, the hole sealing section grouting pipe, the slurry return pipe and the second extraction pipe are subjected to thermoplastic sealing treatment, so that air leakage is prevented.
The invention is further improved in that two ends of the first capsule body are respectively fastened through the first movable metal hoops, and two ends of the second capsule body are respectively fastened through the first movable metal hoops.
The invention has the further improvement that the front end and the rear end of the second extraction pipe are both provided with internal threads for connecting the extraction pipeline.
The invention has the further improvement that the air pressure interface of the automatic slurry supplementing device is connected with a mine air pressure pipeline, the mine air pressure pipeline provides driving force for the pneumatic increasing device, and the air pressure in the mine air pressure pipeline is increased by 2-5 times;
the first supercharging outlet and the second supercharging outlet are respectively used as driving forces for outputting different pressures to the first pulp storage tank and the second pulp storage tank.
A self-adaptive dynamic hole sealing method is based on the self-adaptive dynamic hole sealing system and comprises the following steps:
the method comprises the following steps that firstly, a front hole sealing capsule is connected with an extraction pipeline, a first capsule grouting pipe is connected with a high-pressure hose and sent to the inside of a drill hole to a proper depth, then the extraction pipeline is connected with a rear hole sealing capsule, the high-pressure hose is connected with a second capsule grouting pipe, and then the extraction pipeline is continuously sent to the drill hole to a proper position;
secondly, connecting a second capsule grouting pipe to a first grout outlet of the automatic grout supplementing device, and connecting a hole sealing section grouting pipe to a second grout outlet;
thirdly, preparing mucus, and injecting the mucus into the first slurry storage tank and the second slurry storage tank from the first slurry supplementing opening and the second slurry supplementing opening respectively;
fourthly, connecting a mine compressed air pipeline to a compressed air interface, opening a pneumatic increasing device for grouting, disturbing the development of a fracture of the drilled hole along with mining after a period of time, generating an air leakage channel, and automatically injecting the slurry in the automatic slurry supplementing device into the drilled hole to fill the fracture;
and fifthly, observing the liquid amounts in the first pulp storage tank and the second pulp storage tank, and timely preparing pulp through the first pulp supplementing opening and the second pulp supplementing opening to supplement pulp if the amount is small.
The invention has the further improvement that the pneumatic increasing device can stably provide pressure for the two slurry storage tanks, the pressure balance of the whole system is ensured if no crack exists in the drill hole, and slurry is automatically supplemented into the drill hole under the influence of pressure if the crack of the drill hole develops.
The invention has the further improvement that mucus is filled into the self-adaptive hole sealing capsule, the self-adaptive hole sealing capsule expands under pressure and has enough supporting effect on the hole wall, and if the hole wall is damaged, the first valve on the second capsule grouting pipe is opened and closed to perform grout filling on the capsule bodies of the two capsules so as to further expand the capsules to achieve the aim of serving as a plug.
The invention is further improved in that the slurry stored in the first slurry storage tank and the second slurry storage tank of the automatic slurry supplementing device is viscous non-solidified liquid, and the viscous liquid has certain viscosity and keeps good viscosity.
The invention has at least the following beneficial technical effects:
the self-adaptive dynamic hole sealing system provided by the invention can be used for dynamically sealing the hole sealing of the mine gas extraction drilled hole in real time, and the sealing effect is reliable. The system comprises the self-adaptive hole sealing capsule and an automatic slurry supplementing device, the self-adaptive hole sealing capsule can be hydraulically supported to expand, and the plugging effect is good. The system adopts mucus to seal holes, can effectively seal off the cracks of the drill holes, and improves the tightness of the drill holes. The system adopts dynamic automatic grouting, avoids the inconvenience of manual construction in the past, realizes dynamic sealing of mine drilling hole sealing, and performs real-time sealing on a newly formed crack. The recovery of the capsule can be realized after the self-adaptive hole sealing capsule is released, and the construction cost is reduced.
The self-adaptive dynamic hole sealing method provided by the invention can adapt to various field conditions, adopts mine compressed air as a driving force, adopts a mechanical method to supplement slurry, reduces the operation difficulty, improves the construction safety, and automatically supplements the newly grown cracks of the drill hole by a pressure balance method to realize dynamic hole sealing.
In conclusion, the dynamic hole sealing can be realized, the stability is high, the hole sealing effect is good, the cost is low, the hole sealing effect can be continuously and automatically adapted after hole collapse, and the like, and the hole sealing effect during gas extraction is improved.
Drawings
Fig. 1 is a schematic connection diagram of a self-adaptive dynamic hole sealing system according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a pre-sealing capsule according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a rear hole sealing capsule according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an automatic slurry replenishing apparatus according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of a method for adaptive dynamic hole sealing according to an embodiment of the present invention.
Description of reference numerals:
1: self-adaptive hole sealing capsules 2: automatic slurry supplementing device 1 a: preposed hole sealing capsule
1 b: post hole sealing capsules 2-1: a first slurry storage tank 2-2: second slurry storage tank
2-3: pneumatic adding device 2-4: first slurry outlet 2-5: second slurry outlet
2-6: the first slurry supplementing opening 2-7: 2-8 of a second slurry supplementing port: air pressing connector
2-9: first pressurized outlet 2-10: second boost outlet 1 a-1: first capsule grouting pipe
1 a-2: first capsule body 1 a-3: the first extraction pipe 1 a-4: first movable ferrule
1 b-1: second capsule grouting pipe 1 b-2: second capsule body 1 b-3: second extraction pipe
1 b-4: a hole sealing section grouting pipe 1 b-5: slurry return pipe 1 b-6: first valve
1 b-7: second valve 1 b-8: third valve 1 b-9: second movable ferrule
1 c: high-pressure hose
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a self-adaptive dynamic hole sealing system according to an embodiment of the present invention. The system can be applied to the drilling and sealing of the coal mine.
As shown in fig. 1, the adaptive dynamic sealing system provided in the embodiment of the present invention mainly includes an adaptive sealing capsule 1 and an automatic slurry replenishing device 2.
The self-adaptive hole sealing capsule 1 comprises a front hole sealing capsule 1a, a rear hole sealing capsule 1b and a high-pressure hose 1 c; the preposed hole sealing capsule 1a comprises a first capsule grouting pipe 1a-3, a first capsule body 1a-2 and a first extraction pipe 1 a-3; the postposition hole sealing capsule 1b comprises a second capsule grouting pipe 1b-1, a second capsule body 1b-2, a second extraction pipe 1b-3, a hole sealing section grouting pipe 1b-4 and a slurry return pipe 1 b-5; the automatic slurry supplementing device 2 comprises a first slurry storage tank 2-1, a second slurry storage tank 2-2 and a pneumatic adding device 2-3, wherein the first slurry storage tank 2-1 is provided with a first slurry outlet 2-4 and a first slurry supplementing port 2-6, the second slurry storage tank 2-2 is provided with a second slurry outlet 2-5 and a second slurry supplementing port 2-7, and the pneumatic adding device 2-3 is provided with a compressed air connector 2-8, a first pressurizing outlet 2-9 and a second pressurizing outlet 2-10; the first supercharging outlet 2-9 and the second supercharging outlet 2-10 are respectively communicated with the first slurry storage tank 2-1 and the second slurry storage tank 2-2; when the device is in use, a first capsule body 1a-2 in the preposed hole sealing capsule 1a is sleeved on a first extraction pipe 1a-3, two ends of the first capsule body 1a-2 are fastened through a first movable metal hoop 1a-4 respectively, and an outlet of a first capsule grouting pipe 1a-3 penetrates through an opening of the first extraction pipe 1a-1 and is communicated between the first capsule body 1a-2 and the first extraction pipe 1 a-3; a second capsule body 1b-2 of the postpositional hole sealing capsule 1b is sleeved on a second extraction pipe 1b-3, two ends of the second capsule body 1b-2 are respectively fastened through first movable metal hoops 1b-9, the second capsule grouting pipe 1b-1, the hole sealing section grouting pipe 1b-4 and the slurry return pipe 1b-5 penetrate through the second extraction pipe 1b-3, two second capsule grouting pipes 1b-1 are arranged, a first outlet is communicated between the second capsule body 1b-2 and the second extraction pipe 1b-3, a second outlet is communicated to an inlet of the second capsule grouting pipe 1b-1 through a high-pressure hose 1c, and the first extraction pipe 1a-3 is communicated with the second extraction pipe 1b-3 through a third extraction pipe; an inlet of a second capsule grouting pipe 1b-1 of the rear hole sealing capsule 1b is connected with a first slurry outlet 2-4 of the automatic slurry supplementing device 2, and an inlet of a hole sealing section grouting pipe 1b-4 is connected with a second slurry outlet 2-5.
In addition, a first valve 1b-6, a second valve 1b-7 and a third valve 1b-8 are respectively arranged on the second capsule grouting pipe 1b-1, the hole sealing section grouting pipe 1b-4 and the slurry return pipe 1b-5, and grouting operation is carried out through opening and closing of the valves.
It should be noted that in the embodiment of the present invention, the holes with different apertures can be sealed by changing the thickness of the capsule body, and the capsule body with an unnecessary model is selected according to different types of the holes in actual operation.
In practical application, the front hole sealing capsule is connected with an extraction pipeline, the extraction pipeline is connected with the rear hole sealing capsule, the first capsule grouting pipe 1a-1 is connected with the second capsule grouting pipe 1b-1 through a high-pressure hose, each section needs to be conveyed to a proper position of a drill hole for next operation, and the lengths of the extraction pipeline can be connected according to actual conditions.
Fig. 2 is a schematic structural diagram of a pre-sealing capsule, and as shown in fig. 2, the pre-sealing capsule sealing device can be used as a hole sealing device alone, but only allows temporary sealing operation.
Specifically, the capsule body is fixed on the PVC extraction pipe through a movable metal hoop, wherein the front end metal hoop is a movable device, the rear end metal hoop is fixed, and the front end metal hoop can move on the extraction pipe in a small range after the capsule is expanded so as to meet the expansion requirement.
It should be noted that one section of the first capsule grouting pipe 1a-1 is arranged in the extraction pipe, penetrates through the extraction pipe through an opening, and is sealed at the opening to prevent air leakage and liquid leakage.
Fig. 3 is a schematic structural view of a rear sealing capsule, and as shown in fig. 3, the rear sealing capsule must be used in combination with a front sealing capsule.
The method for fixing the rear capsule body on the pvc extraction pipe is the same as that of the front capsule body, three high-pressure hoses are arranged in the extraction pipe and have the functions of capsule body grouting, middle area grouting and slurry return respectively, and the high-pressure hoses extend out of the opening of the extraction pipe and seal the opening to prevent air leakage and liquid leakage.
FIG. 4 is a schematic structural view of an automatic slurry replenishing device, as shown in FIG. 4, two slurry storage tanks are arranged in the automatic slurry replenishing device, and air leakage does not occur between the two slurry storage tanks in a sealing manner; the automatic slurry supplementing device is provided with a pressurizing device above, the pressure of the mining compressed air pipeline can be increased by 5 times to the maximum extent, the requirement for grouting of the bag is met, the pressurizing device can realize regional pressurization, and the pressurization of the first slurry storage tank 2-1 is far higher than that of the second slurry storage tank 2-2.
In practical application, after the connection of the self-adaptive hole sealing capsule device is completed and the device is sent to a proper position of a drilled hole, the capsule grouting pipe is connected to the first slurry outlet 2-4 of the automatic slurry supplementing device, and the hole sealing section grouting pipe is connected to the second slurry outlet 2-5. Preparing mucilage, and injecting the mucilage into the first slurry storage tank 2-1 and the second slurry storage tank 2-2 from the first slurry supplementing opening 2-6 and the second slurry supplementing opening 2-7 respectively.
Specifically, the grout in the first grout supplementing opening 2-6 and the first grout storing tank 2-1 is used for grouting the capsule body, and the grout in the second grout supplementing opening 2-7 and the second grout storing tank 2-2 is used for grouting the middle section area.
In practical application, the compressed air pipe connector is connected with a mine compressed air pipeline to provide driving force for the pressurizing device, the mine pressurizing device can increase the pressure by 2-5 times and provide pressure for the slurry storage tank through different pressurizing outlets, mucus in the slurry storage tank is continuously supplemented by the pressure, the pressure for grouting the capsule body is greater than the grouting pressure for the middle area, and the operation can be adjusted on the pressurizing device.
In practical application, a mine compressed air pipeline is connected to a compressed air interface, a pneumatic increasing device is opened, a first valve 1b-6 is opened to perform grouting on a capsule body, the first valve 1b-6 is closed after pressure is stable, a second valve 1b-7 is opened to perform grouting on a middle area, and a third valve 1b-8 is closed after a slurry return pipe starts to return slurry.
Specifically, after the capsule body is grouted, a subsequent manual attempt is made to move the extraction pipeline, whether the self-adaptive hole sealing capsule is completely propped open is tested to plug the drilled hole, the middle area is grouted after the test is finished, and after the middle area is grouted, the second valve 1b-7 is not closed, so that the pressure is kept under pressure.
In practical application, after the holes are broken, the first valve 1b-6 can be opened to carry out pulp supplementing operation on the capsule body; and along with the development of the mining disturbance drilling cracks, an air leakage channel is formed, and the slurry in the automatic slurry supplementing device can be automatically injected into the drilling holes to fill the cracks. And then observing the liquid amounts in the first slurry storage tank 2-1 and the second slurry storage tank 2-2, and if the amount is small, preparing slurry in time to supplement slurry through the first slurry supplementing opening 2-6 and the second slurry supplementing opening 2-7.
Based on the same inventive concept, an embodiment of the present invention provides a method for adaptive dynamic hole sealing, and as shown in fig. 5, a schematic diagram of the method for adaptive dynamic hole sealing provided by the embodiment of the present invention is provided.
As shown in fig. 5, a method for adaptive dynamic hole sealing provided in an embodiment of the present invention includes the following steps:
and 5-1, sending the self-adaptive hole sealing capsule into a proper position according to the actual situation of the drilling hole, and connecting the self-adaptive hole sealing capsule with an automatic slurry supplementing device.
And 5-2, connecting the compressed air pipeline to the slurry supplementing device after the slurry supplementing device is connected, performing primary grouting, wherein the capsule is firstly grouted by the primary grouting, and then the middle area is grouted.
And 5-3, after the primary grouting is finished, continuously opening the grouting valve in the middle area, and if the drilled hole has cracks, continuously supplementing the grouting in the middle area due to the pressure in the grouting tank to prevent an air leakage channel.
Because the principle of solving the technical problem of the method is similar to that of a self-adaptive dynamic hole sealing system, the implementation of the method can be referred to the implementation of the system, and repeated parts are not described again.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A self-adaptive dynamic hole sealing system is characterized by comprising a self-adaptive hole sealing capsule (1) and an automatic slurry supplementing device (2); wherein the content of the first and second substances,
the self-adaptive hole sealing capsule (1) comprises a front hole sealing capsule (1a), a rear hole sealing capsule (1b) and a high-pressure hose (1 c); the preposed hole sealing capsule (1a) comprises a first capsule grouting pipe (1a-3), a first capsule body (1a-2) and a first extraction pipe (1 a-3); the postposition hole sealing capsule (1b) comprises a second capsule grouting pipe (1b-1), a second capsule body (1b-2), a second extraction pipe (1b-3), a hole sealing section grouting pipe (1b-4) and a slurry return pipe (1 b-5);
the automatic slurry supplementing device (2) comprises a first slurry storage tank (2-1), a second slurry storage tank (2-2) and a pneumatic adding device (2-3), wherein a first slurry outlet (2-4) and a first slurry supplementing port (2-6) are arranged on the first slurry storage tank (2-1), a second slurry outlet (2-5) and a second slurry supplementing port (2-7) are arranged on the second slurry storage tank (2-2), and a compressed air connector (2-8), a first pressurized outlet (2-9) and a second pressurized outlet (2-10) are arranged on the pneumatic adding device (2-3); the first supercharging outlet (2-9) and the second supercharging outlet (2-10) are respectively communicated with the first slurry storage tank (2-1) and the second slurry storage tank (2-2);
when the device is in use, a first capsule body (1a-2) in the preposed hole sealing capsule (1a) is sleeved on a first extraction pipe (1a-3), two ends of the first capsule body (1a-2) are fastened, and an outlet of a first capsule grouting pipe (1a-3) penetrates through an opening of the first extraction pipe (1a-1) and is communicated between the first capsule body (1a-2) and the first extraction pipe (1 a-3); a second capsule body (1b-2) of the postpositional hole sealing capsule (1b) is sleeved on the second extraction pipe (1b-3), two ends of the second capsule body (1b-2) are fastened, the second capsule grouting pipe (1b-1), the hole sealing section grouting pipe (1b-4) and the slurry return pipe (1b-5) penetrate through the second extraction pipe (1b-3), two second capsule grouting pipes (1b-1) are arranged, a first outlet is communicated between the second capsule body (1b-2) and the second extraction pipe (1b-3), a second outlet is communicated to an inlet of the second capsule grouting pipe (1b-1) through a high-pressure hose (1c), and the first extraction pipe (1a-3) is communicated with the second extraction pipe (1b-3) through a third extraction pipe; an inlet of a second capsule grouting pipe (1b-1) of the rear hole sealing capsule (1b) is connected with a first slurry outlet (2-4) of the automatic slurry supplementing device (2), and an inlet of a hole sealing section grouting pipe (1b-4) is connected with a second slurry outlet (2-5).
2. The adaptive dynamic hole sealing system according to claim 1, wherein the second capsule grouting pipe (1b-1), the hole sealing section grouting pipe (1b-4) and the slurry return pipe (1b-5) are respectively provided with a first valve (1b-6), a second valve (1b-7) and a third valve (1b-8), and grouting operation is performed by opening and closing the valves.
3. The self-adaptive dynamic hole sealing system according to claim 1, wherein the openings of the first capsule grouting pipes (1a-3) and the first extraction pipes (1a-1) are subjected to thermoplastic sealing treatment to prevent air leakage and liquid leakage;
openings of the second capsule grouting pipe (1b-1), the hole sealing section grouting pipe (1b-4), the slurry return pipe (1b-5) and the second extraction pipe (1b-3) are subjected to thermoplastic sealing treatment, so that air leakage is prevented.
4. The adaptive dynamic sealing system according to claim 1, wherein two ends of the first capsule body (1a-2) are respectively fastened by a first movable metal hoop (1a-4), and two ends of the second capsule body (1b-2) are respectively fastened by a first movable metal hoop (1 b-9).
5. The self-adaptive dynamic hole sealing system according to claim 1, wherein internal threads are formed at the front end and the rear end of the second extraction pipe (1b-3) and are used for connecting extraction pipelines.
6. The self-adaptive dynamic hole sealing system according to claim 1, wherein the compressed air interface (2-8) of the automatic grout supplementing device (2) is connected with a mine compressed air pipeline, a driving force is provided for the pneumatic increasing device (2-3) through the mine compressed air pipeline, and the air pressure in the mine compressed air pipeline is increased by 2-5 times;
the first supercharging outlet (2-9) and the second supercharging outlet (2-10) respectively output different pressures as driving forces for the first pulp storage tank (2-1) and the second pulp storage tank (2-2).
7. An adaptive dynamic hole sealing method is characterized in that the method is based on the adaptive dynamic hole sealing system of any one of claims 1 to 6, and comprises the following steps:
firstly, connecting a front hole sealing capsule (1a) with an extraction pipeline, connecting a first capsule grouting pipe (1a-1) with a high-pressure hose (1c) to a proper depth in a drill hole, connecting the extraction pipeline with a rear hole sealing capsule (1b), connecting the high-pressure hose (1c) with a second capsule grouting pipe (1b-1), and then continuously conveying the drill hole to a proper position;
secondly, connecting a second capsule grouting pipe (1b-1) to a first grout outlet (2-4) of the automatic grout supplementing device (2), and connecting a hole sealing section grouting pipe (1b-4) to a second grout outlet (2-5);
thirdly, preparing mucus, and injecting the mucus into the first slurry storage tank (2-1) and the second slurry storage tank (2-2) from the first slurry supplementing opening (2-6) and the second slurry supplementing opening (2-7) respectively;
fourthly, connecting the mine compressed air pipeline to a compressed air interface (2-8), opening the pneumatic increasing device (2-3) for grouting, and after a period of time, disturbing the development of the fracture of the drilled hole along with mining to form an air leakage channel, wherein the slurry in the automatic slurry supplementing device can be automatically injected into the drilled hole to fill the fracture;
and fifthly, observing the liquid amounts in the first pulp storage tank (2-1) and the second pulp storage tank (2-2), and timely preparing pulp through the first pulp supplementing opening (2-6) and the second pulp supplementing opening (2-7) to supplement pulp if the liquid amounts are small.
8. The self-adaptive dynamic hole sealing method according to claim 7, characterized in that the pneumatic increasing device (2-3) can stably provide pressure for two slurry storage tanks, if no crack exists in the drill hole, the pressure balance of the whole system is ensured, and if the crack of the drill hole develops, the slurry is automatically replenished into the drill hole under the influence of the pressure.
9. The self-adaptive dynamic hole sealing method according to claim 7, characterized in that the self-adaptive hole sealing capsules (1) are filled with mucus, are expanded under pressure and have sufficient supporting effect on the hole wall, and if the hole wall is damaged, the first valve (1b-6) on the second capsule grouting pipe (1b-1) is opened and closed to perform grouting on the two capsule bodies so as to further expand the capsule bodies to achieve the aim of being used as a plug.
10. The self-adaptive dynamic hole sealing method according to claim 7, characterized in that the slurry stored in the first slurry storage tank (2-1) and the second slurry storage tank (2-2) of the automatic slurry supplementing device (2) is a viscous non-setting liquid, and the viscous liquid has certain viscosity and the viscosity is well maintained.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236346A (en) * | 2021-06-28 | 2021-08-10 | 山东科技大学 | Anti-collapse reinforced gas extraction device and use method |
| CN114016967A (en) * | 2021-11-05 | 2022-02-08 | 中国矿业大学(北京) | Device and method for improving gas extraction effect through secondary liquid injection of coal seam |
| CN114526032A (en) * | 2022-02-18 | 2022-05-24 | 中煤科工集团重庆研究院有限公司 | Rapid hole sealing equipment and method for extraction pipe |
| CN114607314A (en) * | 2022-03-30 | 2022-06-10 | 煤炭科学技术研究院有限公司 | Mechanical hole packer for gas extraction drilling and use method of mechanical hole packer |
-
2020
- 2020-09-07 CN CN202010930106.7A patent/CN111927528A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236346A (en) * | 2021-06-28 | 2021-08-10 | 山东科技大学 | Anti-collapse reinforced gas extraction device and use method |
| CN114016967A (en) * | 2021-11-05 | 2022-02-08 | 中国矿业大学(北京) | Device and method for improving gas extraction effect through secondary liquid injection of coal seam |
| CN114016967B (en) * | 2021-11-05 | 2022-06-03 | 中国矿业大学(北京) | Device and method for improving gas extraction effect through secondary liquid injection of coal seam |
| CN114526032A (en) * | 2022-02-18 | 2022-05-24 | 中煤科工集团重庆研究院有限公司 | Rapid hole sealing equipment and method for extraction pipe |
| CN114607314A (en) * | 2022-03-30 | 2022-06-10 | 煤炭科学技术研究院有限公司 | Mechanical hole packer for gas extraction drilling and use method of mechanical hole packer |
| CN114607314B (en) * | 2022-03-30 | 2023-10-17 | 煤炭科学技术研究院有限公司 | Mechanical hole packer for gas extraction drilling and use method thereof |
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