Double-shield solid hydraulic reclamation roof-contact hydraulic support and filling method thereof

Abstract

The invention discloses a double-shield solid hydraulic reclamation roof-contact hydraulic support and a filling method thereof. The double-shield solid hydraulic reclamation roof-contact hydraulic support comprises a front four-column type hydraulic support body, an upper shield beam and a lower shield beam, and a bottom-dump scraper conveyor is arranged above the lower shield beam; the lower shield beam is provided with a waste rock leakage opening; and a wind power hydraulic reclamation machine is arranged on the bottom-dump scraper conveyor, and the wind power hydraulic reclamation machine is used for performing hydraulic reclamation on gangue materials to a rear goaf through high-pressure wind to realize roof-contacted filling. The filling method comprises the following steps of: 1) simultaneously carrying out waste rock blowing filling behind the support and waste rock leakage filling of part of the support; (2) filling the leaked waste rocks behind the support, wherein the lower space which is not filled with part of the leaked waste rocks in the step (1) is filled; (3) after the supports are moved one by one, a lower waste rock leaking filling space of the lower shield beam behind the supports and an upper layer blowing filling space behind the upper shield beam are formed, and a space is created for follow-up filling; 4, the steps are repeated in sequence, and coal mining and solid filling of the whole working face are completed. Roof-contacted filling is achieved, meanwhile, the efficiency of traditional solid dense filling is improved, and surface subsidence is reduced.

Description

Technical Field

[0001] This invention belongs to the field of coal mine gangue backfilling technology, and relates to a double-shield solid blasting hydraulic support for roof connection, as well as a filling method for the double-shield solid blasting hydraulic support for roof connection. Background Technology

[0002] my country's coal mines produce a large amount of coal gangue, accounting for approximately 10-20% of total coal production. Simultaneously, there is significant coal mining activity in underground and subsurface areas, necessitating backfilling to replace coal resources. Using coal gangue as backfill material not only solves the environmental problems caused by gangue accumulation on the surface but also provides materials for underground and subsurface mining.

[0003] Currently, commonly used solid backfilling employs integrated mechanized solid backfilling technology, using backfilling supports with post-frame compaction functions. Each support requires 4-7 rounds of compaction after each frame, resulting in slow compaction speed and impacting backfilling efficiency and mining capacity. To achieve efficient backfilling, some researchers have conducted technical research and proposed the "Double-Shelter Gangue Filling Hydraulic Support" (publication number CN114934802A, publication date 2022.08.23). This patent primarily aims for efficient gangue backfilling and can be used in main mining faces for non-dense backfilling under caving mining conditions. However, it cannot achieve roof contact at a height of approximately 1 meter, and its application in "three-under" mining (underground, underground, and underground mining) has poor subsidence reduction effects. How to achieve roof contact backfilling on the basis of a double-sheltered backfilling support while simultaneously improving the efficiency of traditional solid dense backfilling and reducing surface subsidence is a pressing problem that needs to be solved.

[0004] Therefore, it is necessary to develop a double-shielded solid blasting hydraulic support and its filling method. Summary of the Invention

[0005] The purpose of this invention is to provide a double-shielded solid shovel filling hydraulic support, which has the characteristics of realizing top filling, improving the efficiency of solid compaction filling, and reducing surface subsidence.

[0006] Another objective of this invention is to provide a filling method for a double-shielded solid blasting and top hydraulic support.

[0007] The technical solution adopted in this invention includes a front four-column hydraulic support body and a two-layer shield structure consisting of an upper shield beam and a lower shield beam connected to the rear of the support. A bottom-discharge scraper conveyor is installed above the lower shield beam. The lower shield beam is provided with a gangue discharge port. A pneumatic filling machine is installed on the bottom-discharge scraper conveyor. After the pneumatic filling machine rotates part of the gangue material transported by the bottom-discharge scraper conveyor into the inner cavity, it blows the gangue material into the rear goaf area through high-pressure air to achieve roof filling.

[0008] The invention is further characterized by: The bottom-discharge scraper conveyor is equipped with a toothed rail at the top and a traction unit, which pulls the pneumatic filling machine to move on the bottom-discharge scraper conveyor.

[0009] The pneumatic blowing machine includes a traveling frame, two parallel and connected spiral conveying pipes, and a power unit. The traveling frame moves in contact with the toothed rail of the bottom-discharge scraper conveyor. The spiral conveying pipes are connected to the air pipes near the coal seam side wall and to the blow pipes near the goaf side wall.

[0010] The spiral conveyor pipe is fed into and delivered at the front end, and discharged at the rear end. Compressed air is blown into the goaf through the blowpipe. The end shaft is connected to the power unit to make the spiral conveyor pipe rotate.

[0011] One side of the traction unit has a gear as its traveling wheel, which meshes with the toothed rail of the bottom-discharge scraper conveyor. The traction unit is equipped with a power-driven gear for rotation.

[0012] Another technical solution of the present invention is that the filling method is implemented according to the following steps: Step 1: Backfilling with blasted rock and backfilling of partially missing rock sections of the support structure are carried out simultaneously; Step 2: Fill the gaps in the support structure, filling the lower space that was not fully filled in Step 1. Step 3: Coal mining in front of the frame, moving the frame while mining coal. After moving the frame one by one, the lower part of the lower shield beam behind the frame and the upper layer of blown filling space behind the upper shield beam are formed, creating space for subsequent filling. Step 4: Repeat steps 1, 2, and 3 in sequence to complete the coal mining and solid backfilling of the entire working face.

[0013] Another feature of the technical solution of the present invention is that: Step 1 is as follows: Several hydraulic supports are installed at the coal mining face. These supports are numbered sequentially from the gangue feed roadway to the coal conveying roadway as 1, 2, 3, ..., i-1, i, i+1, ..., N. All hydraulic supports are aligned in a straight line. The discharge ports of the bottom-discharge scraper conveyor are fully open. The pneumatic backfiller and its traction unit travel on the bottom-discharge scraper conveyor. The gangue feed belt conveyor, the bottom-discharge scraper conveyor, and the pneumatic backfiller operate, moving the coal from the gangue feed roadway to the coal conveying roadway. The waste rock is filled sequentially along the channel direction, with both waste rock filling and blown waste rock filling carried out simultaneously. The filling amount of the two methods is adjusted by the distance between the feed port of the blown waste rock filling machine and the bottom discharge scraper conveyor. When blown waste rock filling reaches the i-th frame, blown waste rock filling can only continue to the i+1 or i-1 frames after the top is connected. The blown waste rock filling machine travels on the bottom discharge scraper conveyor according to the filling situation. This process is repeated until the top connection of the first to Nth frames is completed, thus completing one round of blown waste rock filling and top connection work for the entire working face.

[0014] Step 2 specifically involves: raising the distance between the feed inlet of the pneumatic compactor and the bottom-discharge scraper conveyor, and operating the feed conveyor belt and the bottom-discharge scraper conveyor to fill the lower space of the rear protective beam of the first to Nth frames in sequence.

[0015] The beneficial effects of this invention are: Compared with traditional integrated mechanized solid backfilling (compaction), the compaction mechanism is eliminated, and air blowing replaces tamping, simplifying the process and increasing efficiency by more than 60%. Compared with double-shield solid backfilling under caving mining conditions (with at least 1m of non-top-connected backfilling), it can achieve top-connected dense backfilling, thus improving its applicability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the double-shielded solid blasting and top hydraulic support of the present invention; Figure 2 This is a schematic diagram of the wind-powered blowing machine structure of the double-shielded solid blowing and top hydraulic support of the present invention; Figure 3 This is a schematic diagram of the spiral conveying pipe structure of the double-shielded solid blasting and top hydraulic support of the present invention.

[0017] In the diagram, 1. Upper shield beam, 2. Lower shield beam, 3. Bottom-discharge scraper conveyor, 31. Gear rail, 4. Pneumatic filling machine, 41. Traveling frame, 42. Spiral conveyor pipe, 43. Power unit, 5. Air duct, 6. Blowing pipe, 7. Loose-filled gangue, 8. Blown gangue. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the following description of the present invention, the terms "first, second, third" are used only to distinguish similar objects and do not represent a specific order of objects. It is understood that "first, second, third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0020] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this invention is for the purpose of describing embodiments of this application only and is not intended to limit the invention.

[0021] Example 1 refer to Figures 1-3 The present invention relates to a double-shield solid slugging and top hydraulic support. The support includes a front four-column hydraulic support body and a two-layer shield structure consisting of an upper shield beam 1 and a lower shield beam 2 connected to the rear of the four-column hydraulic support body. The four-column hydraulic support can adjust the angle of the upper shield beam 1 and the angle and position of the lower shield beam 2. A bottom-discharge scraper conveyor 3 is fixedly installed on the lower shield beam 2, and the lower shield beam 2 has a waste rock outlet.

[0022] A pneumatic filling machine 4 can be movably installed on the bottom-discharge scraper conveyor 3. After the pneumatic filling machine 4 rotates part of the gangue material transported by the bottom-discharge scraper conveyor 3 into the inner cavity, it blows the gangue material into the goaf area behind through high-pressure air to achieve roof filling.

[0023] Example 2 refer to Figures 1-3 The present invention provides a double-shield solid sluice filling top hydraulic support, which includes a front four-column hydraulic support body and a two-layer shield structure consisting of an upper shield beam 1 and a lower shield beam 2 connected to the rear of the four-column hydraulic support body. The four-column hydraulic support can adjust the angle of the upper shield beam 1 and the angle and position of the lower shield beam 2. A bottom discharge scraper conveyor 3 is fixedly installed on the lower shield beam 2, and the lower shield beam 2 has a gangue discharge port.

[0024] A pneumatic filling machine 4 can be movably installed on the bottom-discharge scraper conveyor 3. After the pneumatic filling machine 4 rotates part of the gangue material transported by the bottom-discharge scraper conveyor 3 into the inner cavity, it blows the gangue material into the goaf area behind through high-pressure air to achieve roof filling.

[0025] Specifically, a pair of toothed rails 31 are fixed on the top of the bottom-discharge scraper conveyor 3, and a traction unit is also provided on the bottom-discharge scraper conveyor 3, which can pull the pneumatic filling machine 4 to move on the bottom-discharge scraper conveyor 3.

[0026] The pneumatic filling machine 4 moves on the bottom-discharge scraper conveyor 3, enabling the filling work to be carried out evenly.

[0027] Example 3 refer to Figures 1-3 The present invention provides a double-shield solid sluice filling top hydraulic support, which includes a front four-column hydraulic support body and a two-layer shield structure consisting of an upper shield beam 1 and a lower shield beam 2 connected to the rear of the four-column hydraulic support body. The four-column hydraulic support can adjust the angle of the upper shield beam 1 and the angle and position of the lower shield beam 2. A bottom discharge scraper conveyor 3 is fixedly installed on the lower shield beam 2, and the lower shield beam 2 has a gangue discharge port.

[0028] A pneumatic filling machine 4 can be movably installed on the bottom-discharge scraper conveyor 3. After the pneumatic filling machine 4 rotates part of the gangue material transported by the bottom-discharge scraper conveyor 3 into the inner cavity, it blows the gangue material into the goaf area behind through high-pressure air to achieve roof filling.

[0029] Specifically, a pair of toothed rails 31 are fixed on the top of the bottom-discharge scraper conveyor 3, and a traction unit is also provided on the bottom-discharge scraper conveyor 3, which can pull the pneumatic filling machine 4 to move on the bottom-discharge scraper conveyor 3.

[0030] The pneumatic filling machine 4 moves on the bottom-discharge scraper conveyor 3, enabling the filling work to be carried out evenly.

[0031] refer to Figure 2-3 The pneumatic blowing machine 4 includes a traveling frame 41, two parallel and connected spiral conveying pipes 42, and a power unit 43. The spiral conveying pipes 42 are located above the traveling frame 41, and the power unit 43 is located behind the spiral conveying pipes 42. The power unit 43 can drive the spiral conveying pipes 42 to rotate. The traveling frame 41 meshes with the toothed rail 31 of the bottom discharge scraper conveyor 3 to move. The spiral conveying pipes 42 are connected to the air pipes 5 near the side wall of the coal seam for conveying gangue with high-pressure air. The spiral conveying pipes 42 are connected to the blow pipes 6 near the side wall of the goaf for outputting gangue for blowing work.

[0032] Example 4 refer to Figures 1-3 The present invention provides a double-shield solid sluice filling top hydraulic support, which includes a front four-column hydraulic support body and a two-layer shield structure consisting of an upper shield beam 1 and a lower shield beam 2 connected to the rear of the four-column hydraulic support body. The four-column hydraulic support can adjust the angle of the upper shield beam 1 and the angle and position of the lower shield beam 2. A bottom discharge scraper conveyor 3 is fixedly installed on the lower shield beam 2, and the lower shield beam 2 has a gangue discharge port.

[0033] A pneumatic filling machine 4 can be movably installed on the bottom-discharge scraper conveyor 3. After the pneumatic filling machine 4 rotates part of the gangue material transported by the bottom-discharge scraper conveyor 3 into the inner cavity, it blows the gangue material into the goaf area behind through high-pressure air to achieve roof filling.

[0034] Specifically, a pair of toothed rails 31 are fixed on the top of the bottom-discharge scraper conveyor 3, and a traction unit is also provided on the bottom-discharge scraper conveyor 3, which can pull the pneumatic filling machine 4 to move on the bottom-discharge scraper conveyor 3.

[0035] The pneumatic filling machine 4 moves on the bottom-discharge scraper conveyor 3, enabling the filling work to be carried out evenly.

[0036] refer to Figure 2-3The pneumatic blowing machine 4 includes a traveling frame 41, two parallel and connected spiral conveying pipes 42, and a power unit 43. The spiral conveying pipes 42 are located above the traveling frame 41, and the power unit 43 is located behind the spiral conveying pipes 42. The power unit 43 can drive the spiral conveying pipes 42 to rotate. The traveling frame 41 meshes with the toothed rail 31 of the bottom discharge scraper conveyor 3 to move. The spiral conveying pipes 42 are connected to the air pipes 5 near the side wall of the coal seam for conveying gangue with high-pressure air. The spiral conveying pipes 42 are connected to the blow pipes 6 near the side wall of the goaf for outputting gangue for blowing work.

[0037] Specifically, the front end of the spiral conveyor pipe 42 rotates to feed and deliver material, while the rear end rotates to discharge material and is blown into the goaf area by air pressure through the blowpipe 6. The end shaft of the spiral conveyor pipe 42 is connected to the power unit 43 to make the spiral conveyor pipe 42 rotate.

[0038] Example 5 refer to Figures 1-3 The present invention provides a double-shield solid sluice filling top hydraulic support, which includes a front four-column hydraulic support body and a two-layer shield structure consisting of an upper shield beam 1 and a lower shield beam 2 connected to the rear of the four-column hydraulic support body. The four-column hydraulic support can adjust the angle of the upper shield beam 1 and the angle and position of the lower shield beam 2. A bottom discharge scraper conveyor 3 is fixedly installed on the lower shield beam 2, and the lower shield beam 2 has a gangue discharge port.

[0039] A pneumatic filling machine 4 can be movably installed on the bottom-discharge scraper conveyor 3. After the pneumatic filling machine 4 rotates part of the gangue material transported by the bottom-discharge scraper conveyor 3 into the inner cavity, it blows the gangue material into the goaf area behind through high-pressure air to achieve roof filling.

[0040] Specifically, a pair of toothed rails 31 are fixed on the top of the bottom-discharge scraper conveyor 3, and a traction unit is also provided on the bottom-discharge scraper conveyor 3, which can pull the pneumatic filling machine 4 to move on the bottom-discharge scraper conveyor 3.

[0041] Specifically, the traveling wheel on one side of the traction unit is a gear, and the traction unit meshes with the gear rail 31 of the bottom-discharge scraper conveyor 3. The power drive gear inside the traction unit rotates to make the traction unit travel. The pneumatic filling machine 4 moves on the bottom-discharge scraper conveyor 3, enabling the filling work to be carried out evenly.

[0042] refer to Figure 2-3The pneumatic blowing machine 4 includes a traveling frame 41, two parallel and connected spiral conveying pipes 42, and a power unit 43. The spiral conveying pipes 42 are located above the traveling frame 41, and the power unit 43 is located behind the spiral conveying pipes 42. The power unit 43 can drive the spiral conveying pipes 42 to rotate. The traveling frame 41 meshes with the toothed rail 31 of the bottom discharge scraper conveyor 3 to move. The spiral conveying pipes 42 are connected to the air pipes 5 near the side wall of the coal seam for conveying gangue with high-pressure air. The spiral conveying pipes 42 are connected to the blow pipes 6 near the side wall of the goaf for outputting gangue for blowing work.

[0043] Specifically, the front end of the spiral conveyor pipe 42 rotates to feed and deliver material, while the rear end rotates to discharge material and is blown into the goaf area by air pressure through the blowpipe 6. The end shaft of the spiral conveyor pipe 42 is connected to the power unit 43 to make the spiral conveyor pipe 42 rotate.

[0044] This embodiment represents only a preferred implementation of the double-shielded solid sluice gate hydraulic support of the present invention. Any structure designed using similar technical features to the present invention will fall within the protection scope of the double-shielded solid sluice gate hydraulic support of the present invention.

[0045] Example 6 The filling method of the double-shielded solid blasting and top hydraulic support of the present invention is implemented according to the following steps: Step 1: Backfilling with blown gangue and backfilling of partially missing gangue from the support structure are carried out simultaneously; the backfill material for blown gangue is blown gangue 8, and the backfill material for missing gangue is missing gangue 7. Step 2: Fill the gaps in the support structure, filling the lower space that was not fully filled in Step 1. Step 3: Coal mining in front of the frame, moving the frame while mining coal. After moving the frame one by one, the lower part of the lower shield beam 2 behind the frame and the upper layer of blown filling space behind the upper shield beam 1 are formed, creating space for subsequent filling. Step 4: Repeat steps 1, 2, and 3 in sequence to complete the coal mining and solid backfilling of the entire working face.

[0046] Step 1 specifically involves: Several hydraulic supports are installed at the coal mining face. These supports are numbered sequentially from the coal feed roadway to the coal conveying roadway as 1, 2, 3, ..., i-1, i, i+1, ..., N. The hydraulic supports are arranged in a straight line. The discharge ports of the bottom-discharge scraper conveyor 3 are fully open. The pneumatic ballast machine 4 and its traction unit travel on the bottom-discharge scraper conveyor 3. The coal feed belt conveyor, the bottom-discharge scraper conveyor 3, and the pneumatic ballast machine 4 operate, moving the coal from the coal feed roadway towards... The coal conveyor is filled with waste rock in sequence along the coal conveyor roadway. Waste rock filling and blown waste rock filling are carried out simultaneously. The filling amount of the two methods is adjusted by the distance between the feed port of the blown waste rock filling machine 4 and the bottom discharge scraper conveyor 3. When blown waste rock filling reaches the i-th frame, blown waste rock filling can only continue to the i+1 or i-1 frames after the top is connected. The blown waste rock filling machine 4 travels on the bottom discharge scraper conveyor 3 according to the filling situation. This is repeated until the top connection of the first to Nth frames is completed, thus completing one round of blown waste rock filling and top connection work for the entire working face.

[0047] Step 2 specifically involves: raising the distance between the feed inlet of the pneumatic filling machine and the bottom-discharge scraper conveyor 3, and operating the feed conveyor belt and the bottom-discharge scraper conveyor 3 to fill the lower space of the rear lower protective beam 2 of the first to Nth frames in sequence.

[0048] This invention relates to a double-shield solid blasting hydraulic support and its filling method, which combines lower leakage filling and upper blasting filling, solving the problem of efficient and dense solid filling. It can increase the daily filling speed from 2-3 cuts to 5-7 cuts, improving filling efficiency by more than 60%.

[0049] The foregoing has provided a detailed description of the double-shield rear-mounted scraper type wind-powered filling device and its filling method provided by the present invention. Specific examples have been used to illustrate the implementation of the present invention. The description of the above embodiments is only for the purpose of helping to understand the structure and core idea of ​​the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the present invention. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A double-shielded solid blasting and jacking hydraulic support, characterized in that, It includes a front four-column hydraulic support body and a two-layer shield structure consisting of an upper shield beam (1) and a lower shield beam (2) connected to the back of the support. A bottom-discharge scraper conveyor (3) is installed above the lower shield beam (2). The lower shield beam (2) is provided with a gangue outlet. A pneumatic filling machine (4) is installed on the bottom-discharge scraper conveyor (3). The pneumatic filling machine (4) rotates part of the gangue material transported by the bottom-discharge scraper conveyor (3) into the inner cavity, and then blows the gangue material to the rear goaf area through high-pressure air to achieve roof filling.

2. The double-shielded solid blasting and jacking hydraulic support according to claim 1, characterized in that, The bottom-discharge scraper conveyor (3) is equipped with a toothed rail (31) on top, and a traction unit is also provided on the bottom-discharge scraper conveyor (3). The traction unit pulls the pneumatic filling machine (4) to move on the bottom-discharge scraper conveyor (3).

3. The double-shielded solid blasting and top-mounting hydraulic support according to claim 2, characterized in that, The pneumatic filling machine (4) includes a walking frame (41), two parallel spiral conveying pipes (42) and a power unit (43). The walking frame (41) meshes with the toothed rail (31) of the bottom-discharge scraper conveyor (3). The spiral conveying pipe (42) is connected to the air pipe (5) near the side wall of the coal mining wall and to the blowing pipe (6) near the side wall of the goaf.

4. The double-shielded solid blasting and jacking hydraulic support according to claim 3, characterized in that, The spiral conveyor pipe (42) is fed into and delivered at the front end, and discharged at the rear end. Compressed air is blown into the goaf area through the blow pipe (6). The end shaft is connected to the power unit (43) to make the spiral conveyor pipe (42) rotate.

5. The double-shielded solid blasting and jacking hydraulic support according to claim 3, characterized in that, One side of the traction unit has a gear as its traveling wheel, and the traction unit meshes with the gear rail (31) of the bottom-discharge scraper conveyor (3). The traction unit is equipped with a power drive gear for rotation.

6. The filling method of the double-shielded solid caving and top-mounting hydraulic support according to claim 1, using the double-shielded solid caving and top-mounting hydraulic support as described in claims 1-5, is characterized in that, The filling method is implemented according to the following steps: Step 1: Backfilling with blasted rock and backfilling of partially missing rock sections of the support structure are carried out simultaneously; Step 2: Fill the gaps in the support structure, filling the lower space that was not fully filled in Step 1. Step 3: Coal mining in front of the frame, moving the frame while mining coal. After moving the frame one by one, the lower part of the lower shield beam (2) and the upper part of the upper shield beam (1) are filled with the leaked gangue filling space, creating space for subsequent filling. Step 4: Repeat steps 1, 2, and 3 in sequence to complete the coal mining and solid backfilling of the entire working face.

7. The filling method for the double-shielded solid blasting and top hydraulic support according to claim 6, characterized in that, Step 1 is as follows: Several hydraulic supports are set up at the coal mining face. The hydraulic supports are numbered sequentially from the gangue feed roadway to the coal conveying roadway as 1, 2, 3, ..., i-1, i, i+1, ..., N. The hydraulic supports are arranged in a straight line. The discharge port of the bottom-discharge scraper conveyor (3) is fully opened. The pneumatic ballast machine (4) and the traction unit travel on the bottom-discharge scraper conveyor (3). The gangue feed belt conveyor, the bottom-discharge scraper conveyor (3) and the pneumatic ballast machine (4) are running, from the gangue feed roadway. The coal conveying roadway is filled with leaked gangue in sequence. Both leaked gangue filling and blown gangue filling are carried out simultaneously. The filling amount of the two methods is adjusted by the distance between the feed port of the wind-powered filling machine (4) and the bottom-discharge scraper conveyor (3). When the blown gangue filling reaches the i-th frame, the blowing can only continue to the i+1 or i-1 frames after the blowing and filling is connected to the top. The wind-powered filling machine (4) moves on the bottom-discharge scraper conveyor according to the filling situation. This is repeated until the blowing and filling of the first to Nth frames is completed, thus completing one round of blowing and filling work for the entire working face.

8. The filling method for the double-shielded solid blasting and top hydraulic support according to claim 6, characterized in that, Step 2 specifically involves raising the distance between the feed inlet of the pneumatic filling machine (4) and the bottom-discharge scraper conveyor (3), operating the feed conveyor belt and the bottom-discharge scraper conveyor (3) to fill the lower space of the rear lower shield beam (2) of the first to Nth frames.

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