CN113914856A - Coal seam water injection device - Google Patents
Coal seam water injection device Download PDFInfo
- Publication number
- CN113914856A CN113914856A CN202111131801.8A CN202111131801A CN113914856A CN 113914856 A CN113914856 A CN 113914856A CN 202111131801 A CN202111131801 A CN 202111131801A CN 113914856 A CN113914856 A CN 113914856A
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- Prior art keywords
- water injection
- drill bit
- hydraulic cylinder
- coal seam
- hydraulic
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/22—Equipment for preventing the formation of, or for removal of, dust
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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
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
Abstract
The invention discloses a coal seam water injection device which comprises a drill bit, a driving piece and a first water injection pipeline, wherein a drill bit water injection hole is formed in the drill bit, the driving piece is provided with a rotating shaft, a rotating shaft water injection hole is formed in the rotating shaft, the rotating shaft is connected with the drill bit and is communicated with the drill bit water injection hole, the driving piece is used for driving the drill bit to rotate, and the first water injection pipeline is connected with one end, far away from the drill bit, of the rotating shaft water injection hole. According to the coal seam water injection device provided by the embodiment of the invention, the drill bit is used for drilling holes in a coal seam, in the drilling process, pressure water is injected into the water injection hole of the rotating shaft and the water injection hole of the drill bit through the first water injection pipeline to cool the driving piece and the drill bit, and the pressure water enters the drill hole through the water injection hole of the drill bit to infiltrate the coal seam, so that the coal dust amount generated when coal blocks are crushed is reduced, and the dust diffusion during the crushing of coal bodies is also effectively reduced.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to a coal seam water injection device.
Background
In recent years, with the increasing levels of intellectualization, mechanization and automation of mines, a large amount of dust is generated in various links such as underground coal cutting, coal transportation, frame moving and the like, so that the life health of operators is harmed, and the explosive coal dust can cause explosion risks and has greater threat to the safety production of coal mines. Mine dust mainly comes from production links such as underground coal mining, tunneling, transportation and lifting, but the production amount is influenced by factors such as geological structure, mining method and ventilation condition. In particular, a great amount of coal dust is generated in the coal cutting process of a coal mining machine and a heading machine, and accounts for about 85% of the total dust, wherein the coal dust comprises native coal dust existing between pores of a coal bed and mining coal dust generated by cutting a coal wall by the coal mining machine.
Therefore, how to reduce coal dust generated in the coal mining process is a key technical problem to be solved by the technical personnel in the field.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the invention provides a coal seam water injection device which can effectively reduce coal dust generated in the coal mining process.
The coal seam water injection device comprises a drill bit, a driving piece and a first water injection pipeline, wherein a drill bit water injection hole is formed in the drill bit, the driving piece is provided with a rotating shaft, a rotating shaft water injection hole is formed in the rotating shaft, the rotating shaft is connected with the drill bit, the rotating shaft water injection hole is communicated with the drill bit water injection hole, the driving piece is used for driving the drill bit to rotate, and the first water injection pipeline is connected with one end, far away from the drill bit, of the rotating shaft water injection hole.
According to the coal seam water injection device provided by the embodiment of the invention, the drill bit is used for drilling holes in a coal seam, in the drilling process, pressure water is injected into the water injection hole of the rotating shaft and the water injection hole of the drill bit through the first water injection pipeline to cool the driving piece and the drill bit, and the pressure water enters the drill hole through the water injection hole of the drill bit to infiltrate the coal seam, so that the coal dust amount generated when coal blocks are crushed is reduced, and the dust diffusion during the crushing of coal bodies is also effectively reduced.
In some embodiments, the drilling and injecting assembly further comprises a connecting shaft, a connecting shaft water injection hole is arranged in the connecting shaft, one end of the connecting shaft is connected with the drill bit, the other end of the connecting shaft is connected with the rotating shaft, one end of the connecting shaft water injection hole is communicated with the drill bit water injection hole, and the other end of the connecting shaft water injection hole is communicated with the rotating shaft water injection hole.
In some embodiments, the drilling and injecting assembly further comprises a hole sealing water bag and a second water injection pipeline, the hole sealing water bag is arranged around the connecting shaft and/or the outer peripheral wall of the drill bit, and the second water injection pipeline is communicated with an inner cavity of the hole sealing water bag.
In some embodiments, the drill bit is provided with a first small diameter section, the connecting shaft is provided with a second small diameter section, the outer diameters of the first small diameter section and the second small diameter section are the same, the first small diameter section and the second small diameter section are connected to define an annular groove, and the hole sealing water bag is arranged in the annular groove.
In some embodiments, the drive is a hydraulic motor or an electric motor.
In some embodiments, the hydraulic support comprises a base, a connecting rod assembly, a shield beam, a top beam, a side guard plate, and a hydraulic column, wherein a first end of the connecting rod assembly is rotatably connected to the base, a first end of the shield beam is rotatably connected to a second end of the connecting rod assembly, a first section of the top beam is rotatably connected to a second end of the shield beam, one end of the side guard plate is rotatably connected to a second end of the top beam, and one end of the hydraulic column is connected to the base and the other end is connected to the top beam.
In some embodiments, the hydraulic support further comprises a self-walking translation stage, the self-walking translation stage is connected with the hydraulic support, the drilling and grouting assembly is connected with the self-walking translation stage, and the drilling and grouting assembly is movable along the length direction of the self-walking translation stage.
In some embodiments, one end of the self-walking translation stage is rotatably connected with one end of the side protection plate far away from the top beam, and the hydraulic support further comprises a first hydraulic cylinder, one end of the first hydraulic cylinder is rotatably connected with the side protection plate, and the other end of the first hydraulic cylinder is rotatably connected with the self-walking translation stage.
In some embodiments, the hydraulic support further includes a second hydraulic cylinder and a third hydraulic cylinder, an upper end of the second hydraulic cylinder and an upper end of the third hydraulic cylinder are both rotatably connected to the top beam, a lower end of the second hydraulic cylinder and a lower end of the third hydraulic cylinder are both rotatably connected to the self-walking translation stage, and the second hydraulic cylinder and the third hydraulic cylinder are arranged at intervals along the length direction of the top beam.
In some embodiments, the hydraulic support further comprises a fourth hydraulic cylinder, one end of the fourth hydraulic cylinder is rotatably connected with the top beam, and the other end of the fourth hydraulic cylinder is connected with the cylinder barrel of the second hydraulic cylinder or the cylinder barrel of the third hydraulic cylinder.
Drawings
FIG. 1 is a schematic view of a drilling and injection assembly of a coal seam water injection apparatus according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a coal seam water injection apparatus in a self-walking translation stage shield state according to an embodiment of the invention;
FIG. 3 is an enlarged view A of a portion of the coal seam water injection apparatus shown in FIG. 2;
FIG. 4 is a schematic view of a coal seam water injection apparatus in a retracted state from a walking translation stage according to an embodiment of the invention;
FIG. 5 is a schematic view of a coal seam water injection apparatus in a self-walking translation stage shield state according to another embodiment of the invention;
FIG. 6 is a schematic view of a coal seam water injection apparatus according to another embodiment of the invention in a retracted state from a walking translation stage;
reference numerals:
a hydraulic support 1, a base 11, a connecting rod assembly 12, a shield beam 13, a top beam 14, a side guard plate 15, a hydraulic upright post 16, a first hydraulic cylinder 171, a second hydraulic cylinder 172, a third hydraulic cylinder 173 and a fourth hydraulic cylinder 174,
the drilling and injecting component 2, the drill bit 21, the drill bit water injection hole 211, the driving component 22, the rotating shaft 221, the rotating shaft water injection hole 222, the motor liquid inlet 223, the motor liquid outlet 224, the first water injection pipeline 23, the connecting shaft 24, the connecting shaft water injection hole 241, the hole sealing water bag 25, the second water injection pipeline 26, the capsule water injection pipe 261, the capsule water injection hole 262, the annular groove 27,
from the walking translation stage 3.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1, the coal seam water injection device according to the embodiment of the invention comprises a hydraulic support 1 and a drilling and injecting assembly 2, wherein the drilling and injecting assembly 2 is mounted on the hydraulic support 1, the hydraulic support 1 plays a role in supporting and controlling the drilling and injecting assembly 2, the drilling and injecting assembly 2 comprises a drill bit 21, a driving part 22 and a first water injection pipeline 23, the drill bit 21 is transversely arranged on the left side of the driving part 22, and the first water injection pipeline 23 is arranged on the right side of the driving part 22.
A drill water injection hole 211 is coaxially formed in the drill 21, and the drill water injection hole 211 transversely penetrates through the drill 21.
The driving member 22 has a rotating shaft 221, the rotating shaft 221 is coaxially disposed with the drill bit 21, a rotating shaft water injection hole 222 is coaxially formed in the rotating shaft 221, the rotating shaft water injection hole 222 transversely penetrates through the rotating shaft 221, the left end of the rotating shaft 221 is connected with the right end of the drill bit 21, the rotating shaft water injection hole 222 is communicated with the drill bit water injection hole 211, and the driving member 22 is used for driving the drill bit 21 to rotate.
The first water injection line 23 is connected to the right end of the rotation axis water injection hole 222, and the first water injection line 23 supplies pressure water into the rotation axis water injection hole 222.
According to the coal seam water injection device provided by the embodiment of the invention, the drill bit 21 is used for drilling a hole in a coal seam, in the drilling process, pressure water is injected into the rotary shaft water injection hole 222 and the drill bit water injection hole 211 through the first water injection pipeline 23, the driving piece 22 and the drill bit 21 are cooled, and the pressure water enters the drill hole through the drill bit water injection hole 211 to infiltrate the coal seam, so that the coal dust amount generated when coal blocks are crushed is reduced, and the dust diffusion during the crushing of coal bodies is also effectively reduced.
As shown in fig. 1, in some embodiments, the drilling and injecting assembly 2 further includes a connecting shaft 24, the connecting shaft 24 is disposed coaxially with the drill bit 21, a connecting shaft water injection hole 241 is disposed coaxially in the connecting shaft 24, the connecting shaft water injection hole 241 transversely penetrates through the connecting shaft 24, the connecting shaft 24 is disposed between the drill bit 21 and the rotating shaft 221, a left end of the connecting shaft 24 is detachably connected to a right end of the drill bit 21, so that the drill bits 21 with different sizes can be replaced, a sleeve hole is disposed coaxially at a right end of the connecting shaft 24, a left end of the rotating shaft 221 is disposed in the sleeve hole and is connected to the connecting shaft 24 through a key, so that the rotating shaft 221 can drive the connecting shaft 24 to rotate, a left end of the connecting shaft water injection hole 241 is communicated with a right end of the drill bit water injection hole 211, a right end of the connecting shaft water injection hole 241 is communicated with a left end of the rotating shaft water injection hole 222, and the drill bit 21 is connected to the rotating shaft 221 through the connecting shaft 24, can be disassembled, and is convenient for replacing and maintaining the device.
As shown in fig. 1, in some embodiments, the drilling and injecting assembly 2 further includes a sealing water bag 25 and a second water injection pipeline 26, the sealing water bag 25 is disposed around the outer peripheral wall of the connecting shaft 24 and the drill bit 21, the second water injection pipeline 26 is located at an end of the sealing water bag 25 close to the driving member 22, the second water injection pipeline 26 includes a capsule water injection pipe 261 and a capsule water injection port 262, the capsule water injection port 262 is located at an end of the capsule water injection pipe 261 close to the driving member 22, and an end of the capsule water injection pipe 261 far from the driving member 22 is sealingly inserted into the sealing water bag 25, so that the capsule water injection pipe 261 is communicated with an inner cavity of the sealing water bag 25.
In some embodiments, as shown in fig. 1, the drill bit 21 is provided with a first small diameter section, which is located at one end of the drill bit 21 close to the connecting shaft 24, the connecting shaft 24 is provided with a second small diameter section which is positioned at one end of the connecting shaft 24 close to the drill bit 21, the outer diameters of the first small diameter section and the second small diameter section are the same, the first small diameter section and the second small diameter section are detachably connected, an annular groove is defined between the drill bit 21 and the connecting shaft 24 by the first small diameter section and the second small diameter section, the hole sealing water bag 25 is arranged in the annular groove, after drilling is finished, the drill bit 21 does not need to be withdrawn from the hole, water is injected into the hole sealing water bag 25 through the capsule water injection port 262, the hole sealing water bag 25 expands and deforms under the condition of internal liquid filling, and the volume of the hole sealing water bag 25 is increased to play a role in sealing the hole opening and fixing the drill bit 21, so that water backflow in the high-pressure water injection process is prevented.
As shown in fig. 3, in some embodiments, the driving member 22 is a hydraulic motor or an electric motor, if the driving member 22 selects the hydraulic motor as the rotation power, the hydraulic motor has a motor inlet 223 and a motor outlet 224, the motor inlet 223 is open downward, the motor outlet 224 is open downward, on the hydraulic motor, the motor outlet 224 is closer to the drill bit 21 than the motor inlet 223, both the rotation and the water injection of the hydraulic motor can be completed by using the original electrohydraulic control reversing valve of the hydraulic support 1, and the hydraulic motor is linked with the hydraulic support 1 to complete the automatic control; if the driving member 22 selects a motor as the rotating power, a motor control device needs to be additionally installed on the hydraulic bracket 1 and connected to the control network of the hydraulic bracket 1 to complete the automatic control.
As shown in fig. 2, in some embodiments, the hydraulic support 1 includes a base 11, a connecting rod assembly 12, a shield beam 13, a top beam 14, a side guard 15, and a hydraulic column 16, where the connecting rod assembly 12 includes two connecting rods, a lower end of each connecting rod is rotatably connected to the base 11, and the two connecting rods are located at a rear portion of the base 11; the lower end of the shield beam 13 is rotatably connected with the upper end of the connecting rod assembly 12, and the connecting rod assembly 12, the base 11 and the shield beam 13 form a four-bar mechanism; the top beam 14 is positioned above the shield beam 13 and transversely arranged, and the right end of the top beam 14 is rotatably connected with the upper end of the shield beam 13; the side protection plate 15 is vertically arranged, and the upper end of the side protection plate 15 is rotatably connected with the left end of the top beam 14; the lower end of the hydraulic upright column 16 is connected with the base 11, and the upper end of the hydraulic upright column 16 is rotatably connected with the top beam 14; the underground hydraulic supports 1 of the coal mine are all grouped, a group of hydraulic supports 1 comprises hundreds of hydraulic supports, the hydraulic supports 1 are arranged in a row along the cutting direction of a coal mining machine, and the hydraulic supports 1 are installed on mining equipment such as a conveyor and the like moving along a working face.
According to another aspect of the invention, the coal seam water injection device further comprises a self-walking translation table 3, the self-walking translation table 3 is connected with the hydraulic support 1, a sliding rail is arranged on the self-walking translation table 3 and is arranged along the length direction of the self-walking translation table 3, and the driving piece 22 is connected in the sliding rail in a sliding manner, so that the drilling and injecting assembly 2 can move along the length direction of the self-walking translation table 3.
As shown in fig. 2, this embodiment is a connection mode of the self-propelled translation stage 3, the left end of the self-propelled translation stage 3 is rotatably connected with the lower end of the side-protection plate 15, the hydraulic support 1 further comprises a first hydraulic cylinder 171, the first hydraulic cylinder 171 is arranged obliquely downward, the upper end of the first hydraulic cylinder 171 is rotatably connected with the side-protection plate 15, and the lower end of the first hydraulic rod is rotatably connected with the self-propelled translation stage 3.
In the shield state of the hydraulic support 1 in such a connection manner, as shown in fig. 2, the side protection plate 15 is opened to contact with the coal seam, the first hydraulic cylinder 171 extends out and pushes the self-walking translation stage 3 to be unfolded to a horizontal position, and an included angle between the self-walking translation stage 3 and the side protection plate 15 is 90 degrees; in a state where the apparatus waits for coal cutting, as shown in fig. 4, the first hydraulic cylinder 171 is retracted and pulls up the self-propelled translation stage 3, an included angle between the self-propelled translation stage 3 and the side protection plate 15 is an acute angle, and after the self-propelled translation stage is retracted, the side protection plate 15 is deflected in a direction away from the coal seam and gradually approaches the top beam 14.
As shown in fig. 5, this embodiment is another connection mode of the self-walking translation stage 3, the hydraulic support 1 further includes a second hydraulic cylinder 172 and a third hydraulic cylinder 173, an upper end of the second hydraulic cylinder 172 is rotatably connected to the top beam 14, a lower end of the second hydraulic cylinder 172 is rotatably connected to the self-walking translation stage 3, an upper end of the third hydraulic cylinder 173 is rotatably connected to the top beam 14, a lower end of the third hydraulic cylinder 173 is rotatably connected to the self-walking translation stage 3, the second hydraulic cylinder 172 and the third hydraulic cylinder 173 are arranged at intervals along the length direction of the top beam 14, the second hydraulic cylinder 172 is connected to a left end of the self-walking translation stage 3, the third hydraulic cylinder 173 is connected to a right end of the self-walking translation stage 3, and the second hydraulic cylinder 172 and the third hydraulic cylinder 173 ensure that the self-walking translation stage 3 is always horizontally stable during the unfolding process of the device.
In some embodiments, as shown in fig. 5, the hydraulic support 1 further comprises a fourth hydraulic cylinder 174, wherein the upper end of the fourth hydraulic cylinder 174 is rotatably connected to the top beam 14, and the lower end of the fourth hydraulic cylinder 174 is rotatably connected to the upper portion of the cylinder of the third hydraulic cylinder 173.
In the shield state of the hydraulic support 1 in this connection manner, as shown in fig. 5, the side guard 15 is opened to contact with the coal seam, the fourth hydraulic cylinder 174 extends out and pushes the second hydraulic cylinder 172 and the third hydraulic cylinder 173 to deflect clockwise, meanwhile, the second hydraulic cylinder 172 and the third hydraulic cylinder 173 extend out and push the self-walking translation stage 3 to move towards the direction close to the coal seam, the self-walking translation stage 3 is kept horizontal all the time during the movement, and the drilling and injecting assembly 2 is driven to move below the side guard 15; in the state of waiting for coal cutting, as shown in fig. 6, the fourth hydraulic cylinder 174 is retracted and pulls the second hydraulic cylinder 172 and the third hydraulic cylinder 173 to deflect counterclockwise, and at the same time, the second hydraulic cylinder 172 and the third hydraulic cylinder 173 are retracted and will be pulled up from the walking translation stage 3, and the toe guard 15 deflects away from the coal seam and gradually approaches the top beam 14.
The overall operation of the coal seam water injection apparatus will be described below.
When the hydraulic support 1 is in a shield state, a hydraulic motor or a motor control device is started to propel the hydraulic support on the self-walking translation table 3, and meanwhile, a drill bit 21 is started and the coal seam is punched; after the drilling is finished, the drill bit 21 does not need to be withdrawn, water is injected into the hole sealing water bag 25 through the second water injection pipeline 26, and the hole sealing water bag 25 expands and seals a drilled hole; after the hole sealing water bag 25 is completely expanded and fixed, the first water injection pipeline 23 is filled with liquid, and pressure water reaches the front end of the drill bit 21 through the rotary shaft water injection hole 222 and is discharged, so that coal seam water injection operation is performed; after the water injection, the first water injection pipeline 23 stops flowing through the liquid, water in the hole sealing water bag 25 is discharged, after the hole sealing water bag 25 recovers to a normal state, the hydraulic support 1 is withdrawn, the drilling and injection assembly 2 is removed along with the self-walking translation table 3, and a water injection operation period is completed after the whole body is retracted.
The coal seam water injection device integrates the functions of drilling, hole sealing and water injection, and can be controlled by an automatic system to perform the integrated operations of drilling, hole sealing and water injection, so that the mining and water injection processes are synchronously performed, the mining cost is saved, the labor intensity of workers is reduced, the coal mining efficiency is improved, and the unmanned mining construction of coal mines is accelerated.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. The utility model provides a coal seam water injection device which characterized in that includes hydraulic support and establishes drilling on the hydraulic support annotates the subassembly, it includes to bore notes subassembly:
the drill bit is internally provided with a drill bit water injection hole;
the driving piece is provided with a rotating shaft, a rotating shaft water injection hole is formed in the rotating shaft, the rotating shaft is connected with the drill bit and communicated with the drill bit water injection hole, and the driving piece is used for driving the drill bit to rotate;
and the first water injection pipeline is connected with one end, far away from the drill bit, of the rotating shaft water injection hole.
2. The coal seam water injection device according to claim 1, wherein the drilling and injecting assembly further comprises a connecting shaft, a connecting shaft water injection hole is arranged in the connecting shaft, one end of the connecting shaft is connected with the drill bit, the other end of the connecting shaft is connected with the rotating shaft, one end of the connecting shaft water injection hole is communicated with the drill bit water injection hole, and the other end of the connecting shaft water injection hole is communicated with the rotating shaft water injection hole.
3. The coal seam water injection device according to claim 2, wherein the drilling and injecting assembly further comprises a hole sealing water bag and a second water injection pipeline, the hole sealing water bag is arranged around the connecting shaft and/or the outer peripheral wall of the drill bit, and the second water injection pipeline is communicated with an inner cavity of the hole sealing water bag.
4. The coal seam water injection apparatus according to claim 3, wherein the drill bit is provided with a first small diameter section, the connecting shaft is provided with a second small diameter section, the first small diameter section and the second small diameter section have the same outer diameter, the first small diameter section and the second small diameter section are connected to define an annular groove, and the hole sealing water pocket is arranged in the annular groove.
5. The coal seam water injection apparatus of claim 1, wherein the driving member is a hydraulic motor or an electric motor.
6. Coal seam water injection apparatus according to any of claims 1-5, characterized in that the hydraulic support comprises:
a base;
the first end of the connecting rod assembly is rotatably connected with the base;
a shield beam, a first end of the shield beam rotatably coupled to a second end of the linkage assembly;
a top beam rotatably connected at a first end to a second end of the shield beam;
one end of the side protection plate is rotatably connected with the second end of the top beam;
and one end of the hydraulic upright column is connected with the base, and the other end of the hydraulic upright column is connected with the top beam.
7. The coal seam water injection apparatus of claim 6, further comprising a self-walking translation stage, wherein the self-walking translation stage is connected with the hydraulic support, the drilling and injecting assembly is connected with the self-walking translation stage, and the drilling and injecting assembly is movable along the length direction of the self-walking translation stage.
8. The coal seam water injection apparatus of claim 7, wherein the self-walking translation stage is rotatably connected to the end of the side wall protection plate away from the top beam at one end, and the hydraulic support further comprises a first hydraulic cylinder, one end of the first hydraulic cylinder is rotatably connected to the side wall protection plate, and the other end of the first hydraulic cylinder is rotatably connected to the self-walking translation stage.
9. The coal seam water injection apparatus of claim 7, wherein the hydraulic support further comprises a second hydraulic cylinder and a third hydraulic cylinder, an upper end of the second hydraulic cylinder and an upper end of the third hydraulic cylinder are both rotatably connected with the top beam, a lower end of the second hydraulic cylinder and a lower end of the third hydraulic cylinder are both rotatably connected with the self-walking translation stage, and the second hydraulic cylinder and the third hydraulic cylinder are arranged at intervals along the length direction of the top beam.
10. The coal seam water injection apparatus according to claim 9, wherein the hydraulic support further comprises a fourth hydraulic cylinder, one end of the fourth hydraulic cylinder is rotatably connected with the top beam, and the other end of the fourth hydraulic cylinder is connected with the cylinder barrel of the second hydraulic cylinder or the cylinder barrel of the third hydraulic cylinder.
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|---|---|---|---|
| CN202111131801.8A CN113914856A (en) | 2021-09-26 | 2021-09-26 | Coal seam water injection device |
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| CN202111131801.8A CN113914856A (en) | 2021-09-26 | 2021-09-26 | Coal seam water injection device |
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| CN205977219U (en) * | 2016-08-26 | 2017-02-22 | 中铁七局集团武汉工程有限公司 | Big quick excavating equipment of section tunnel |
| CN106320979A (en) * | 2016-09-26 | 2017-01-11 | 辽宁工程技术大学 | Fixed drilling device for fully mechanized mining face crossing fault and use method |
| CN108661693A (en) * | 2018-04-25 | 2018-10-16 | 山东科技大学 | A kind of multi-stag coal-bed flooding drilling and sealing system and water injecting drilling method for sealing |
| CN112879073A (en) * | 2021-03-22 | 2021-06-01 | 北京天地玛珂电液控制系统有限公司 | Water injection method for underground coal mining coal seam or rock stratum |
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