Supporting device for fully mechanized coal mining face of coal mine

Abstract

The invention discloses a coal mine fully mechanized coal mining face supporting device which comprises a hydraulic support, a supporting rod, a water jet nozzle, an air bag and an air inlet pipe. According to the supporting device for the fully-mechanized coal mining face, in the supporting process, the supporting rods can transmit supporting force upwards to the side protection plates, the side protection plates transmit the supporting force upwards to the front ends of the top beams, so that the front ends of the top beams provide large supporting force for a top plate of the fully-mechanized coal mining face, and the supporting effect of the front ends of the hydraulic supports on the top plate is improved; the roof collapse risk is reduced. Besides, as the air bags extrude the coal seams with larger extrusion force in the cutting holes, larger extrusion acting force exists between the coal seams, coal briquettes are more compact, additional protection is provided for the coal wall, the wall caving phenomenon of the coal wall due to overlarge mining height is prevented, the risk of wall caving of the coal wall is greatly reduced, and the safety of the coal wall is improved. Therefore, the safety of the whole mining is improved.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine support equipment, and in particular to a coal mine fully mechanized mining working face support device. Background Art

[0002] In the ultra-high fully-mechanized mining face of coal mines, the traditional hydraulic support support technology faces several challenges and shortcomings, especially in controlling mine pressure. Specifically, the upward force of the support column cylinder is mainly transmitted to the rear half of the top beam, while providing less support to the telescopic top beam at the front end of the support. This unbalanced force distribution results in insufficient support effect on the tunnel roof at the front end of the support, increasing the risk of roof collapse at the front end of the coal mining face. In addition, due to the large height of the coal wall, the traditional side guard plate is insufficient in its support capacity for the coal wall and is difficult to resist the formation of coal wall spalling. This not only increases the risk of coal wall spalling, but also reduces the safety of the entire mining process. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a coal mine fully mechanized mining working face support device.

[0004] The coal mine comprehensive mining working face support device of the embodiment of the present invention includes a hydraulic support, a support rod, a water jet nozzle, an air bag and an air intake pipe. The hydraulic support includes a movably connected guard plate and a top beam. The guard plate has a first end face and a second end face opposite to each other along its thickness direction, and the first end face is used to stop against the coal wall; the support rod is arranged perpendicular to the guard plate, and the support rod is connected to the guard plate in an adjustable position along the thickness direction of the guard plate; the water jet nozzle is arranged at one end of the support rod facing the coal wall, and the water jet nozzle is used to emit a water jet toward the coal wall to form a cutting hole on the coal wall; the air bag is arranged around the support rod along the circumference of the support rod; the air intake pipe is connected to the air bag for inflating the air bag, and the inflation of the air bag can stop against the inner wall surface of the cutting hole.

[0005] In some embodiments, a groove is formed on the first end surface, and the groove extends to the edge of the guard plate. The groove is used to discharge the coal-water mixture generated by cutting the coal wall.

[0006] In some embodiments, the guard plate is provided with a through hole extending along the thickness direction of the guard plate, the through hole is for the support rod to pass through, and an adjustment component is provided on the second end surface, the adjustment component is connected to the support rod to adjust the position of the support rod in the thickness direction of the guard plate.

[0007] In some embodiments, the adjustment assembly includes a sleeve and a sealing plate, the sleeve is connected to the second end face and the sleeve is coaxially arranged with the through hole, the sleeve has a first port and a second port relative to each other, the first port is arranged adjacent to the second end face, the sealing plate blocks the second port, the support rod includes a connected sliding section and a supporting section, the sliding section is arranged adjacent to the sealing plate and is slidably matched with the inner wall of the sleeve along the axial direction of the sleeve, a sealed cavity is defined between the sliding section, the sleeve and the sealing plate, an air inlet and an exhaust port connected to the sealed cavity are opened on the outer wall of the sleeve, and the airbag is arranged on the supporting section.

[0008] In some embodiments, the adjustment assembly also includes a return spring disposed in the sealing cavity, wherein both ends of the return spring are respectively connected to the sliding section and the sealing plate, and the return spring provides an elastic force to the support rod along the axial direction of the sleeve toward the sealing plate.

[0009] In some embodiments, the length of the sleeve is greater than the length of the support rod, the outer diameter of the sliding section is D1, the outer diameter of the support section is D2, and the outer diameter of the airbag is D, wherein D2≤D≤D1.

[0010] In some embodiments, the support rod is a hollow structure, and the support rod has a third end face and a fourth end face opposite to each other along its axial direction, the third end face is arranged adjacent to the sealing plate, the sealing plate is provided with a first through-hole, and the third end face is provided with a second through-hole coaxially arranged with the first through-hole, the air intake pipe passes through the first through-hole and the second through-hole and extends into the support rod, the air intake pipe is slidably matched with the first through-hole and the second through-hole along the axial direction of the sleeve, a third through-hole is provided on the outer wall of the support rod, and the air intake pipe is connected with the airbag through a branch pipe passing through the third through-hole.

[0011] In some embodiments, a mounting through hole is opened on the fourth end face, the water jet nozzle is arranged on the mounting through hole, a fourth through hole is opened on the sealing plate, and a fifth through hole is opened on the third end face coaxially arranged with the fourth through hole. The coal mine comprehensive mining working face support device also includes a water inlet pipe, which passes through the fourth through hole and the fifth through hole and extends into the support rod. The water inlet pipe can be slidably matched with the fourth through hole and the fifth through hole along the axial direction of the sleeve, and the water inlet pipe is connected to the water jet nozzle for delivering high-pressure water to the water jet nozzle.

[0012] In some embodiments, a first valve is provided on the air inlet pipe, and the first valve is used to control the on-off of the air inlet pipe; a second valve is provided on the water inlet pipe, and the second valve is used to control the on-off of the water inlet pipe.

[0013] In some embodiments, the number of the airbags is multiple, and the multiple airbags include a first airbag and a second airbag, the first airbag and the second airbag are spaced apart in the axial direction of the support rod, an air hole is provided on the side wall of the support rod, the air hole is located between the first airbag and the second airbag, the air hole is used for the gas in the cutting hole to enter the support rod, a gas concentration sensor is provided in the support rod, and the gas concentration sensor is used to detect the gas concentration in the cutting hole;

[0014] The coal mine comprehensive mining working face support device also includes a controller, which is respectively connected to the gas concentration sensor and the coal mining machine control, and the controller is configured to control and adjust the coal mining speed and feed amount of the coal mining machine according to the detection value of the gas concentration sensor.

[0015] In the supporting process of the coal mine fully-mechanized mining working face supporting device of the embodiment of the present invention, the supporting rod can transfer the supporting force upward to the guard plate, and the guard plate then transfers the supporting force upward to the front end of the top beam, so that the front end of the top beam provides a greater supporting force to the roof of the fully-mechanized mining working face, thereby improving the supporting effect of the front end of the hydraulic support on the roof and reducing the risk of roof collapse. In addition, because the airbag squeezes the coal seam with a greater squeezing force in the cutting hole, there is a greater squeezing force between the coal seams, making the coal blocks more compact, providing additional protection for the coal wall, preventing the coal wall from spalling due to excessive mining height, greatly reducing the risk of coal wall spalling, and thus improving the safety of the entire mining. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a coal mine fully mechanized mining working face support device according to an embodiment of the present invention.

[0017] Figure 2 It is a usage status diagram of the coal mine fully mechanized mining working face support device according to an embodiment of the present invention.

[0018] Figure 3 yes Figure 2 Enlarged schematic diagram of part A.

[0019] Figure 4 It is a usage status diagram of the coal mine fully mechanized mining working face support device according to an embodiment of the present invention.

[0020] Figure 5 yes Figure 4 Schematic diagram of the enlarged portion B.

[0021] Reference numerals:

[0022] 100. Coal mine comprehensive mining working face support device; 200. Coal wall; 1. Hydraulic support; 101. Guard plate; 1011. First end face; 1012. Second end face; 102. Top beam; 103. Groove; 2. Support rod; 201. Sliding section; 202. Support section; 203. Third end face; 204. Fourth end face; 205. Air hole; 3. Water jet nozzle; 4. Cutting hole; 5. Air bag; 501. First air bag; 502. Second air bag; 6. Air inlet pipe; 7. Sleeve; 701. First port; 702. Second port; 703. Air inlet; 704. Exhaust port; 8. Closing plate; 9. Sealing chamber; 10. Reset spring; 11. Branch pipe; 12. Water inlet pipe; 13. First valve; 14. Second valve; 15. Gas concentration sensor; 16. Coal mining machine. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0024] like Figures 1 to 5 As shown, the coal mine fully mechanized mining working face support device 100 of the embodiment of the present invention comprises a hydraulic support 1, a support rod 2, a water jet nozzle 3, an air bag 5 and an air inlet pipe 6. The hydraulic support 1 comprises a movably connected guard plate 101 and a top beam 102, the guard plate 101 having a first end face 1011 and a second end face 1012 opposite to each other along its thickness direction, and the first end face 1011 is used to stop against the coal wall 200. The support rod 2 is arranged perpendicular to the guard plate 101, and the support rod 2 is connected to the guard plate 101 in an adjustable position along the thickness direction of the guard plate 101. The water jet nozzle 3 is arranged at one end of the support rod 2 facing the coal wall 200, and the water jet nozzle 3 is used to emit a water jet toward the coal wall 200 to form a cutting hole 4 on the coal wall 200. The air bag 5 is arranged around the support rod 2 along the circumference of the support rod 2. The air inlet pipe 6 is in communication with the airbag 5 and is used for inflating the airbag 5 . The airbag 5 can stop against the inner wall surface of the cutting hole 4 when inflated.

[0025] It should be noted that if Figure 1 and Figure 3 As shown, when the coal mine fully mechanized mining working face support device 100 of the embodiment of the present invention is working, the top beam 102 of the hydraulic support 1 is used to abut against the top plate of the fully mechanized mining working face, and the side guard plate 101 abuts against the coal wall 200 to be cut. A support space is formed between the side guard plate 101 and the top beam 102 for the coal mining machine 16 to move so that the coal mining machine 16 can cut the coal wall 200. After the coal mining machine 16 completes a coal cutting cycle, the hydraulic support 1 and the coal mining machine 16 are pushed and slid to continuously cut the coal wall 200.

[0026] Specifically, when the coal mine fully mechanized mining face support device 100 of the embodiment of the present invention is in use, the top beam 102 of the hydraulic support 1 first supports the top plate of the fully mechanized mining face, and then adjusts the angle between the side guard plate 101 and the top beam 102, and makes a certain interval between the side guard plate 101 and the coal wall 200, so that the coal-water mixture generated by cutting the coal wall can be discharged in time when the cutting hole 4 is formed. After the position of the side guard plate 101 is adjusted, the water jet nozzle 3 is connected to the external high-pressure water supply, so that the water jet nozzle 3 sprays high-pressure water in the direction of the coal wall 200, and the coal wall 200 forms a cutting hole 4 with a certain depth under the impact of the high-pressure water. After the cutting hole 4 is formed, the position of the support rod 2 is adjusted in the thickness direction of the side guard plate 101, so that the support rod 2 carries the airbag 5 into the cutting hole 4. Finally, gas is introduced into the airbag 5 through the air inlet pipe 6 to expand the airbag 5. After the airbag 5 expands, it stops against the inner wall of the cutting hole 4 to support the support rod 2, thereby achieving support and fixation of the support rod 2.

[0027] Therefore, in the supporting process of the coal mine comprehensive mining working face supporting device 100 of the embodiment of the present invention, the supporting rod 2 can transfer the supporting force upward to the guard plate 101, and the guard plate 101 then transfers the supporting force upward to the front end of the top beam 102, so that the front end of the top beam 102 provides a greater supporting force to the roof of the comprehensive mining working face, thereby improving the supporting effect of the front end of the hydraulic support 1 on the roof and reducing the risk of roof collapse. In addition, because the airbag 5 squeezes the coal seam with a greater squeezing force in the cutting hole 4, there is a greater squeezing force between the coal seams, making the coal blocks more compact, providing additional protection for the coal wall 200, preventing the coal wall 200 from spalling due to excessive mining height, greatly reducing the risk of coal wall 200 spalling, thereby improving the safety of the entire mining.

[0028] In some embodiments, a groove 103 is formed on the first end surface 1011 . The groove 103 extends to the edge of the guard plate 101 . The groove 103 is used to discharge the coal-water mixture generated by cutting the coal wall 200 .

[0029] Since the first end surface 1011 is provided with a groove 103 for discharging the coal-water mixture generated when cutting the coal wall 200, when adjusting the position of the guard plate 101, the guard plate 101 can be directly stopped on the coal wall 200. That is, when the guard plate 101 is stopped and supported on the coal wall 200, the coal wall 200 is cut by the water jet nozzle 3 to prevent the coal wall 200 from chipping during the process of forming the cutting hole 4, and the coal-water mixture formed after cutting can be discharged through the groove, which is conducive to improving the safety during the cutting operation.

[0030] In some embodiments, a through hole extending along the thickness direction of the guard plate 101 is opened on the guard plate 101, and the through hole is for the support rod 2 to pass through. An adjustment component is provided on the second end surface 1012, and the adjustment component is connected to the support rod 2 to adjust the position of the support rod 2 in the thickness direction of the guard plate 101.

[0031] Specifically, before the guard plate 101 of the coal mine fully-mechanized mining working face support device 100 of the embodiment of the present invention supports the coal wall, the support rod 2 is first adjusted to be located on the side of the guard plate 101 close to the second end surface 1012 through the adjustment component. After the cutting hole 4 is formed, the support rod 2 is adjusted by the adjustment component to pass through the through hole and extend into the cutting hole 4 for support, so that the coal mine fully-mechanized mining working face support device 100 of the embodiment of the present invention is simple to operate, efficient and convenient, reduces downtime, and improves mining efficiency.

[0032] In some embodiments, the adjustment assembly includes a sleeve 7 and a sealing plate 8, the sleeve 7 is connected to the second end face 1012 and the sleeve 7 is coaxially arranged with the through hole, the sleeve 7 has a first port 701 and a second port 702 opposite to each other, the first port 701 is arranged adjacent to the second end face 1012, and the sealing plate 8 blocks the second port 702. The support rod 2 includes a connected sliding section 201 and a supporting section 202, the sliding section 201 is arranged adjacent to the sealing plate 8 and is slidably matched with the inner wall of the sleeve 7 along the axial direction of the sleeve 7. A sealing cavity 9 is defined between the sliding section 201, the sleeve 7 and the sealing plate 8, an air inlet 703 and an exhaust port connected to the sealing cavity 9 are provided on the outer wall of the sleeve 7, and the airbag 5 is arranged on the supporting section 202.

[0033] Specifically, when the adjustment component adjusts the position of the support rod 2, high-pressure gas is passed into the sealed cavity 9 through the air inlet 703, and a positive pressure is generated in the sealed cavity 9. Under the action of the positive pressure, the sliding section 201 is pushed to slide in the direction away from the sealing plate 8, and the sliding section 201 drives the supporting section 202 to move into the cutting hole 4, and the supporting section 202 drives the airbag 5 into the cutting hole 4. When the gas in the sealed cavity 9 is discharged through the exhaust port 704, the sealed cavity 9 is negatively pressurized. Under the action of the negative pressure, the sliding section 201 slides in the direction close to the sealing plate 8, and the sliding section 201 drives the supporting section 202 to move away from the cutting hole 4, and drives the airbag 5 to the outside of the cutting hole 4, making the adjustment convenient.

[0034] Optionally, the adjustment assembly also includes a return spring 10 arranged in the sealing cavity 9, and the two ends of the return spring 10 are respectively connected to the sliding section 201 and the sealing plate 8. The return spring 10 provides an elastic force to the support rod 2 along the axial direction of the sleeve 7 toward the sealing plate 8.

[0035] The two ends of the return spring 10 are respectively connected to the sliding section 201 and the sealing plate 8. In this way, when the air inlet 703 is closed and the exhaust port 704 is opened, the return spring 10 can pull the support rod 2 toward the sealing plate 8, thereby realizing the return of the support rod 2, which is beneficial to improving the working reliability of the adjustment assembly.

[0036] In some embodiments, the length of the sleeve 7 is greater than the length of the support rod 2, the outer diameter of the sliding section 201 is D1, the outer diameter of the support section 202 is D2, and the outer diameter of the airbag 5 is D, wherein D2≤D≤D1.

[0037] Since the length of the sleeve 7 is greater than the length of the support rod 2, when the support rod 2 and the airbag 5 are not needed, they can be retracted into the sleeve 7, protecting them from the risk of collision damage and saving space. This design of the sleeve 7, the support rod 2 and the airbag 5 makes the entire support device more compact and is conducive to operation in a complex working environment.

[0038] In some embodiments, the support rod 2 is a hollow structure, and the support rod 2 has a third end face 203 and a fourth end face 204 opposite to each other along its axial direction, the third end face 203 is arranged adjacent to the sealing plate 8, the sealing plate 8 is provided with a first through hole, and the third end face 203 is provided with a second through hole coaxially arranged with the first through hole, the air intake pipe 6 extends into the support rod 2 through the first through hole and the second through hole, and the air intake pipe 6 is slidably matched with the first through hole and the second through hole along the axial direction of the sleeve 7. A third through hole is provided on the outer wall of the support rod 2, and the air intake pipe 6 is connected with the airbag 5 through the branch pipe 11 passing through the third through hole.

[0039] When the support rod 2 moves, the air inlet pipe 6 can move with the movement of the support rod 2, so as to ensure that the airbag 5 can obtain gas supply in time when needed without being affected by the movement of the support rod 2, making the arrangement of the air inlet pipe 6 simple.

[0040] In some embodiments, a mounting through hole is provided on the fourth end face 204, the water jet nozzle 3 is provided on the mounting through hole, a fourth through hole is provided on the sealing plate 8, and a fifth through hole coaxially provided with the fourth through hole is provided on the third end face 203. The coal mine fully mechanized mining working face support device 100 of the present invention further includes a water inlet pipe 12, which passes through the fourth through hole and the fifth through hole and extends into the support rod 2, and the water inlet pipe 12 is slidably matched with the fourth through hole and the fifth through hole along the axial direction of the sleeve 7, and the water inlet pipe 12 is connected to the water jet nozzle 3, and is used to deliver high-pressure water to the water jet nozzle 3.

[0041] When the support rod 2 moves, the water inlet pipe 12 can move with the movement of the support rod 2, ensuring that the airbag 5 can be inflated in time when the support rod 2 is extended, so as to ensure that the water jet nozzle 3 can obtain high-pressure water supply in time when needed without being affected by the movement of the support rod 2, making the layout of the water inlet pipe 12 simple.

[0042] In some embodiments, a first valve 13 is provided on the air inlet pipe 6 , and the first valve 13 is used to control the on-off of the air inlet pipe 6 ; a second valve 14 is provided on the water inlet pipe 12 , and the second valve 14 is used to control the on-off of the water inlet pipe 12 .

[0043] The setting of the first valve 13 can ensure that the air inlet pipe 6 can be quickly opened or closed when needed to control the inflation and deflation of the airbag 5. This control capability helps to adjust the expansion strength of the airbag 5 to adapt to different conditions of the coal wall 200. The second valve 14 on the water inlet pipe 12 is used to control the on and off of the water inlet pipe 12. The second valve 14 can control the speed and amount of water flow to adapt to different conditions of the coal wall 200 and support requirements.

[0044] In some embodiments, the number of airbags 5 is multiple, and the multiple airbags 5 include a first airbag 501 and a second airbag 502, and the first airbag 501 and the second airbag 502 are spaced apart in the axial direction of the support rod 2. An air hole 205 is provided on the side wall of the support rod 2, and the air hole 205 is located between the first airbag 501 and the second airbag 502. The air hole 205 is used to allow the gas in the cutting hole 4 to enter the support rod 2. A gas concentration sensor 15 is provided in the support rod 2, and the gas concentration sensor 15 is used to detect the gas concentration in the cutting hole 4. The coal mine comprehensive mining working face support device 100 of the embodiment of the present invention also includes a controller, which is used to control and connect with the gas concentration sensor 15 and the coal mining machine 16 respectively, and the controller is configured to control and adjust the coal mining speed and feed amount of the coal mining machine 16 according to the detection value of the gas concentration sensor 15.

[0045] Specifically, when the first airbag 501 and the second airbag 502 are inflated, the gas in the cavity between the two airbags 5 will enter the support rod 2 through the air hole 205, and the gas concentration sensor 15 will detect the gas concentration in the cutting hole 4.

[0046] The controller judges the data detected by the gas concentration sensor 15. If the gas concentration in the cutting hole 4 exceeds the threshold, the cutting speed and feed rate of the coal mining machine 16 are reduced to prevent the gas in the coal seam from being released too quickly per unit time, which may cause the gas concentration in the fully mechanized mining face to exceed the standard. If the gas concentration in the cutting hole 4 does not exceed the threshold, the cutting speed and feed rate of the coal mining machine 16 are increased to increase the coal mining speed.

[0047] Therefore, the coal mine comprehensive mining working face support device of the embodiment of the present invention can also detect the gas concentration in the coal seam to be cut in advance, judge the gas concentration in the coal seam to be cut, and give early warning to adjust the cutting speed and feed amount of the coal mining machine 16 in real time, so as to avoid the problem of excessive gas concentration in the comprehensive mining working face caused by the excessive cutting speed and feed amount of the coal mining machine 16, thereby avoiding the problem of coal mining machine 16 stopping due to excessive gas concentration in the comprehensive mining working face, thereby saving the time for diffusing and diluting the gas in the comprehensive mining working face, and improving the coal mining efficiency of the coal mine.

[0048] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0052] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0053] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A coal mine fully mechanized mining working face support device, characterized in that: include: A hydraulic support, wherein the hydraulic support comprises a movably connected guard plate and a top beam, wherein the guard plate has a first end face and a second end face opposite to each other along a thickness direction thereof, wherein the first end face is used to stop against a coal wall; A support rod, wherein the support rod is arranged perpendicular to the guard plate, and the support rod is connected to the guard plate in an adjustable position along the thickness direction of the guard plate; A water jet nozzle, the water jet nozzle is arranged at one end of the support rod facing the coal wall, and the water jet nozzle is used to emit a water jet toward the coal wall to form a cutting hole on the coal wall; An airbag, wherein the airbag is arranged around the support rod along the circumference of the support rod; An air inlet pipe is connected to the airbag and is used to inflate the airbag. The airbag can stop against the inner wall surface of the cutting hole when inflated.

2. The coal mine fully mechanized mining working face support device according to claim 1, characterized in that: A groove is provided on the first end surface, and the groove extends to the edge of the guard plate. The groove is used to discharge the coal-water mixture generated by cutting the coal wall.

3. The coal mine fully mechanized mining working face support device according to claim 2 is characterized in that: The guard plate is provided with a through hole extending along the thickness direction of the guard plate, the through hole is for the support rod to pass through, and the second end surface is provided with an adjustment component, the adjustment component is connected to the support rod to adjust the position of the support rod in the thickness direction of the guard plate.

4. The coal mine fully mechanized mining working face support device according to claim 3, characterized in that: The adjusting assembly includes a sleeve and a sealing plate, the sleeve is connected to the second end face and the sleeve is coaxially arranged with the through hole, the sleeve has a first port and a second port opposite to each other, the first port is arranged adjacent to the second end face, the sealing plate blocks the second port, the support rod includes a connected sliding section and a supporting section, the sliding section is arranged adjacent to the sealing plate and is slidably matched with the inner wall of the sleeve along the axial direction of the sleeve, a sealing cavity is defined between the sliding section, the sleeve and the sealing plate, an air inlet and an exhaust port connected to the sealing cavity are opened on the outer wall of the sleeve, and the airbag is arranged on the supporting section.

5. The coal mine fully mechanized mining working face support device according to claim 4, characterized in that: The adjustment assembly also includes a return spring disposed in the sealing cavity, the two ends of the return spring are respectively connected to the sliding section and the sealing plate, and the return spring provides an elastic force to the support rod along the axial direction of the sleeve toward the sealing plate.

6. The coal mine fully mechanized mining working face support device according to claim 4, characterized in that: The length of the sleeve is greater than the length of the support rod, the outer diameter of the sliding section is D1, the outer diameter of the support section is D2, and the outer diameter of the airbag is D, wherein D2≤D≤D1.

7. The coal mine fully mechanized mining working face support device according to claim 4, characterized in that: The support rod is a hollow structure, and has a third end face and a fourth end face opposite to each other along its axial direction. The third end face is arranged adjacent to the sealing plate, and a first through-hole is formed on the sealing plate. A second through-hole coaxially arranged with the first through-hole is formed on the third end face. The air intake pipe extends into the support rod through the first through-hole and the second through-hole, and the air intake pipe can slidably cooperate with the first through-hole and the second through-hole along the axial direction of the sleeve. A third through-hole is formed on the outer wall of the support rod, and the air intake pipe is connected to the airbag through a branch pipe passing through the third through-hole.

8. The coal mine fully mechanized mining working face support device according to claim 7, characterized in that: The fourth end face is provided with a mounting through hole, the water jet nozzle is arranged on the mounting through hole, the sealing plate is provided with a fourth through hole, the third end face is provided with a fifth through hole coaxially arranged with the fourth through hole, the coal mine comprehensive mining working face support device also includes a water inlet pipe, the water inlet pipe passes through the fourth through hole and the fifth through hole and extends into the support rod, the water inlet pipe is slidably matched with the fourth through hole and the fifth through hole along the axial direction of the sleeve, and the water inlet pipe is connected with the water jet nozzle for delivering high-pressure water to the water jet nozzle.

9. The coal mine fully mechanized mining working face support device according to claim 8, characterized in that: The air inlet pipe is provided with a first valve, and the first valve is used to control the on-off of the air inlet pipe; the water inlet pipe is provided with a second valve, and the second valve is used to control the on-off of the water inlet pipe.

10. The coal mine fully mechanized mining working face support device according to claim 7, characterized in that: The number of the airbags is multiple, and the multiple airbags include a first airbag and a second airbag, the first airbag and the second airbag are spaced apart in the axial direction of the support rod, an air hole is provided on the side wall of the support rod, the air hole is located between the first airbag and the second airbag, the air hole is used for the gas in the cutting hole to enter the support rod, a gas concentration sensor is provided in the support rod, and the gas concentration sensor is used to detect the gas concentration in the cutting hole; The coal mine comprehensive mining working face support device also includes a controller, which is respectively connected to the gas concentration sensor and the coal mining machine control, and the controller is configured to control and adjust the coal mining speed and feed amount of the coal mining machine according to the detection value of the gas concentration sensor.

Images