Filling device based on hydraulic support transformation and L-shaped isolation filling method for top coal mining

Abstract

The present application belongs to the technical field of longwall fully mechanized mining face mining filling process, and discloses a filling device based on hydraulic support modification and an L-shaped isolation filling method for upward mining. According to the existing hydraulic support mode and mining filling characteristics, the present application designs an isolation baffle for isolating the coal mining face and the goaf, and separately designs an isolation cloth receiving support and a hydraulic winch compactor for assisting the laying of the isolation cloth, so as to realize the rapid laying of the isolation cloth. Meanwhile, the new L-shaped isolation filling method for upward mining based on the hydraulic winch compactor, the isolation baffle and the isolation cloth receiving support can quickly isolate and shorten the direct roof subsidence, thereby forming a strata support structure system for controlling the old roof subsidence, and can improve the coal mining efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mining and filling process in fully mechanized longwall working face, and particularly relates to a filling device based on hydraulic support modification and an L-shaped isolation filling method for upward mining. BACKGROUND

[0002] As a large coal consumer, China has greatly improved coal production since entering the 21st century. However, with the increase of coal production capacity and the continuous growth of mining time, almost all large and medium-sized enterprises engaged in underground mining are facing the problem of a large amount of "three-under" pressure coal. The amount of "three-under" pressure coal accounts for 10-15% of the current mine reserves, and even more in some cases. Similarly, a large amount of gangue is discharged during coal production, which is lifted from underground to the ground and piled into a gangue mountain. Not only does it occupy a large amount of land, but also pollutes the environment and is prone to danger.

[0003] In order to solve the problem of "three-under" pressure coal and the environmental pollution caused by gangue discharge, paste filling technology is widely used. As one of the green mining technology systems for coal mines, the main purpose of paste filling technology is to solve the problem of "three-under" pressure coal, protect the environment of the mining area, improve the recovery rate of coal resources, and prolong the service life of the mine.

[0004] At present, the mining and filling process of fully mechanized longwall filling working face has certain universality, but also has many shortcomings. The main processes are mining, isolation, filling and solidification. Isolation is an important link and occupies a certain amount of time. The existing isolation process is to first perform top isolation and then bottom isolation. During the isolation time, the roof of the area to be filled will sink by about 400-500 mm, thus wasting production time and reducing the filling control effect. Therefore, when facing upward mining working face, the existing isolation process can be improved. A new efficient filling method can ensure quick isolation. SUMMARY

[0005] In view of the problem of prolonged production time and unsatisfactory filling control effect caused by long isolation time in the mining and filling process in the background art, the present application designs an isolation baffle to isolate the coal mining working face and the goaf according to the existing hydraulic support mode and the characteristics of mining and filling. In order to facilitate the laying of isolation cloth, a separate isolation cloth support is designed, and a hydraulic winch compactor is customized to assist the laying of isolation cloth, so as to realize the rapid laying of isolation cloth. Based on the above isolation and filling device, a rapid filling construction process suitable for L-shaped isolation of upward mining working face is proposed. In summary, the present application provides a filling device based on hydraulic support modification and an L-shaped isolation filling method for upward mining.

[0006] In order to achieve the above object, the following technical scheme is adopted: A filling device based on hydraulic support transformation, comprising a hydraulic support, a hydraulic winch compactor, an isolation baffle, an isolation cloth receiving support and isolation cloth placed in a roll, the isolation cloth is laid along the side of the isolation baffle and the floor of the goaf after crossing the isolation baffle, and the isolation baffle of the goaf is arranged in an L shape under the compaction of the hydraulic winch compactor, the isolation baffle comprises a baffle body mounted on the base of the hydraulic support, a filling through hole is formed in the top end of the baffle body, a cloth pipe is arranged in the filling through hole, one end of the cloth pipe is connected with a feeding pipe through a cloth valve on the working face, the feeding pipe is connected with a paste pump on the ground, and the paste pump on the ground is used for pumping paste to the isolation cloth in the goaf.

[0007] As a further explanation and limitation of the above technical scheme, the top of the baffle body on both sides of the filling through hole is respectively provided with a support roller groove, a support roller is rotatably arranged in each support roller groove, two support rollers are arranged on each side of the top of the baffle body, and the two support rollers on the same side are distributed on both sides of the filling through hole, the support roller and the four support rollers together form an isolation cloth support assembly, which is used to reduce the friction between the isolation cloth and the baffle body.

[0008] As a further explanation and limitation of the above technical scheme, the isolation cloth receiving support comprises a main support frame and a reinforcing auxiliary frame which are fixedly connected and mounted on the base of the hydraulic support, a roller bottom plate is mounted on the main support frame, a first rolling roller group is mounted on the roller bottom plate, a second rolling roller group and a third rolling roller group are respectively mounted on the two inner sides of the main support frame, and the isolation cloth is placed in the rolling roller groove formed by the first rolling roller group, the second rolling roller group and the third rolling roller group.

[0009] As a further explanation and limitation of the above technical scheme, the hydraulic winch compactor comprises a moving base and a counterweight arranged in the moving base, two first hydraulic struts are respectively mounted on the moving base, the piston rod ends of the two first hydraulic struts are respectively hinged to the middle and tail portions of an extension arm, a drag seat is fixedly connected to the head portion of the extension arm, a boom is hinged in the drag seat, one end of the boom is hingedly connected to the waist portion of the extension arm through a second hydraulic strut, a winch seat and a motor are respectively mounted on the extension arm between the two first hydraulic struts, a drum is arranged in the winch seat and is driven by the motor sprocket, a steel wire rope is wound on the drum, the steel wire rope passes through a first fixed pulley and a second fixed pulley in sequence, and a hanger is connected to the end of the steel wire rope, a compaction roller is mounted on the hanger, and the first fixed pulley and the second fixed pulley are respectively mounted on the two end heads of the boom.

[0010] As the further supplementary description of the above technical scheme, the limit hole plate is installed on the one end head of the boom of the second fixed pulley, the limit hole plate limits the large swing of the compaction drum in the lifting process, the proximity switch is installed on the limit hole plate, and the proximity switch forms interlocking control with the motor.

[0011] As the further supplementary description of the above technical scheme, the protection plate beam is hinged on the one end bottom of the boom of the second fixed pulley through the fixed mounting plate, the tension spring is fixedly connected between the protection plate beam and the fixed mounting plate, the guide roller is arranged at the end head of the protection plate beam, the protection plate beam is blocked by the isolation baffle when the boom exits the goaf and is stretched to be opened to protect the lifted compaction drum, and the tension spring is used for ensuring that the protection plate beam is retracted under normal circumstances to avoid affecting the lifting of the compaction drum.

[0012] An L-shaped isolation filling method based on the filling device of the hydraulic support in the above technical scheme is implemented, and the L-shaped isolation filling method comprises the following steps.

[0013] S1: after the coal cutter on the coal mining face cuts two knives of coal, a filling step distance of two knives of coal is reserved in the goaf;

[0014] S2: the tail beams of multiple groups of hydraulic supports are used for supporting the roof of the goaf, and the isolation baffle is used for isolating the coal mining face from the goaf;

[0015] S3: one end head of the isolation cloth on the support is crossed over the isolation baffle and fixed on the floor of the goaf, and the laying of the isolation cloth is completed;

[0016] S4: the hydraulic winch compactor is moved to the vicinity of the isolation baffle, two first hydraulic struts are started, the piston rods of the two first hydraulic struts are cooperatively extended to make the extension arm rise, the head of the extension arm exceeds the isolation baffle, at the same time, the second hydraulic strut is started, the piston rod of the second hydraulic strut is retracted to make the boom rise, the hydraulic winch compactor is continuously moved to make the compaction drum on the boom pass through the isolation baffle, the motor is started to make the compaction drum fall on the isolation cloth on the floor of the goaf, the compaction drum is automatically rolled to the bottom of the isolation baffle due to the slope of the floor, the isolation cloth on the support is pulled to make the isolation cloth laid in an L shape in the goaf;

[0017] S5: then, the motor is started again to lift the compaction drum until the compaction drum contacts the limit hole plate, the proximity switch collects the lifting signal of the compaction drum, and the motor stops running; the hydraulic winch compactor is moved to make the compaction drum exit the goaf under the protection of the protection plate beam;

[0018] S6: one end of the cloth pipe is extended and placed in the goaf through the filling through hole, and the cloth pipe is pressed on the isolation cloth, the cloth valve is opened for filling, when the paste is about to exceed the height of the isolation baffle, the filling is stopped, the supplement valve is switched to continue filling, and when all the cloth valves are filled, the rapid filling of the goaf is completed.

[0019] As a further explanation and limitation of the above technical solution, the distance between the tail beam of the hydraulic support and the middle of the top of the isolation baffle is controlled to be 400-500mm, and is greater than the sum of the diameter of the lifted compaction roller and the vertical cantilever distance of the protective plate beam.

[0020] As a further explanation and limitation of the above technical solution, the filling paste is a mixture of crushed coal gangue and slag or a mixture of solid waste, fly ash, cementing material and water.

[0021] Compared with the existing goaf filling construction process and construction device, the present application has the following advantages:

[0022] 1. Compared with the traditional filling construction device, the present application designs an isolation baffle to isolate the coal mining face and the goaf, and in order to lay the isolation cloth smoothly, a separate isolation cloth receiving support is designed, and a hydraulic winch compactor is customized to assist the laying of the isolation cloth, so as to realize the rapid laying of the isolation cloth.

[0023] 2. The isolation cloth receiving support designed in the present application adopts a first rolling roller group, a second rolling roller group and a third rolling roller group to form a rolling roller groove, and the rolled isolation cloth placed in the rolling roller groove can reduce the laying resistance, so as to realize the rapid laying of the isolation cloth.

[0024] 3. The present application provides a support roller on the top of the isolation baffle, and two support rollers are provided on both sides of the top, and the two support rollers and four support rollers form an isolation cloth support assembly, so as to avoid direct contact between the isolation cloth and the isolation baffle, and further ensure the rapid laying of the isolation cloth.

[0025] 4. In order to ensure the tight compaction of the isolation cloth, a hydraulic winch compactor is specially designed, the two first hydraulic struts of the hydraulic winch compactor realize the lifting of the extension arm, and the second hydraulic strut realizes the adjustment of the angle of the boom, and the motor drives the winch seat to control the lifting of the compaction roller through the first fixed pulley and the second fixed pulley, so as to realize the rapid compaction of the isolation cloth and ensure that there is no empty package at the bottom during the filling paste process.

[0026] 5、The present application is hinged with the protection plate beam on the bottom of the one end of the boom through the fixed mounting plate, and the extension spring is fixedly connected between the protection plate beam and the fixed mounting plate, and the guide roller is arranged at the end of the protection plate beam, so that the protection plate beam is blocked by the blocking plate and stretched to open when the boom exits the goaf, so as to protect the lifted compaction drum.

[0027] 6、Compared with the existing goaf filling process, the novel overhand mining L-shaped isolation filling method based on the hydraulic winch compactor, the isolation blocking plate and the isolation cloth supporting bracket can quickly isolate and shorten the direct roof subsidence, so as to form a strata support structure system for controlling the old roof subsidence, and can improve the coal mining efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0028] Fig. 1 It is a filling construction schematic view in the overhand mining L-shaped isolation filling method in the present application;

[0029] Fig. 2 It is a isolation cloth laying construction schematic view in the overhand mining L-shaped isolation filling method in the present application;

[0030] Fig. 3 It is a structure schematic view of the hydraulic winch compactor in the present application;

[0031] Fig. 4 It is a front view structure view of the isolation blocking plate in the present application;

[0032] Fig. 5 It is a side view structure view of the isolation blocking plate in the present application;

[0033] Fig. 6 It is a structure view of the isolation cloth supporting bracket in the present application;

[0034] Fig. 7 It is a working principle view of the hydraulic winch compactor for the isolation cloth laying construction in the present application.

[0035] Hydraulic support 1, hydraulic winch compactor 2, isolation blocking plate 3, isolation cloth supporting bracket 4, isolation cloth 5, cloth pipe 6, cloth valve 7.

[0036] The isolation blocking plate comprises a blocking plate body 301, a filling through hole 302, a supporting roller 303, a supporting roller 304 and a supporting roller groove 305.

[0037] The isolation cloth supporting bracket comprises a main supporting bracket 401, a reinforcing auxiliary bracket 402, a roller bottom plate 403, a first rolling roller group 404, a second rolling roller group 405 and a third rolling roller group 406.

[0038] The hydraulic winch compactor 2 includes a movable base 201, a first hydraulic support 202, an extension arm 203, a support 204, a boom 205, a second hydraulic support 206, a winch base 207, a drum 208, a first fixed pulley 209, a second fixed pulley 210, a wire rope 211, a hanger 212, a compaction roller 213, a fixed mounting plate 214, a protective beam 215, a tension spring 216, a guide roller 217, a counterweight 218, a motor 219, and a limit hole plate 220. Detailed Implementation

[0039] To further illustrate the technical solution of the present invention, the present invention will be further described below through embodiments.

[0040] Example 1

[0041] As attached Figs. 1-2 As shown, a filling device based on hydraulic support modification includes a hydraulic support 1, a hydraulic winch compactor 2, an isolation baffle 3, an isolation cloth receiving support 4, and an isolation cloth 5 rolled up on it. The isolation cloth 5 is laid across the isolation baffle 3 and along its side and the bottom plate of the goaf. Under the compaction of the hydraulic winch compactor 2, the isolation baffle 3 in the goaf is arranged in an L-shape. One end of the material placing pipe 6 extends across the isolation baffle 3 into the goaf and is pressed onto the isolation cloth 5. The other end of the material placing pipe 6 is connected to the material supply pipe through the material placing valve 7 of the working face. The material supply pipe is connected to the paste pump on the ground and pumps the paste from the ground onto the isolation cloth 5 in the goaf.

[0042] As a further limitation of the above embodiments, see Appendix Fig. 4 and 5 In the above-mentioned filling device, the isolation baffle 3 includes a baffle body 301 mounted on the base of the hydraulic support 1. A filling through hole 302 is provided at the top of the baffle body 301, and the fabric tube 6 is disposed therein. Support roller grooves 305 are respectively provided on the top of the baffle body 301 located on both sides of the filling through hole 302, and support rollers 304 are rotatably disposed in each groove. Two support rollers 303 are provided on both sides of the top of the baffle body 301, and the two support rollers 303 located on the same side are distributed on both sides of the filling through hole 302. The support rollers 304 and the four support rollers 303 together form an isolation cloth support assembly, which is used to reduce the friction between the isolation cloth 5 and the baffle body 301.

[0043] As a further limitation of the above embodiments, see Appendix Fig. 6The supporting frame 4 of the isolation cloth comprises a main supporting frame 401 and a reinforcing vice frame 402, which are fixedly connected and installed on the base of the hydraulic support 1. A roller bottom plate 403 is installed on the main supporting frame 401, and a first rolling roller group 404 is installed on the roller bottom plate 403. A second rolling roller group 405 and a third rolling roller group 406 are respectively installed on the two inner sides of the main supporting frame 401. The isolation cloth 5 is placed in the rolling roller groove formed by the first rolling roller group 404, the second rolling roller group 405 and the third rolling roller group 406.

[0044] As a further limitation of the above embodiment, refer to the accompanying drawings Fig. 3 The hydraulic hoist compactor 2 comprises a moving base 201 and a counterweight 218 arranged in the moving base 201. Two first hydraulic struts 202 are respectively installed on the moving base 201, and the piston rod ends of the two first hydraulic struts 202 are respectively hingedly connected to the middle and tail portions of an extension arm 203. A tow seat 204 is fixedly connected to the head portion of the extension arm 203, and a hanging arm 205 is hingedly connected in the tow seat 204. One end of the hanging arm 205 is hingedly connected to the waist portion of the extension arm 203 through a second hydraulic strut 206. A winch seat 207 and a motor 219 are respectively installed on the extension arm 203 between the two first hydraulic struts 202. A winding drum 208 is arranged in the winch seat 207 and is driven by the motor 219 through a chain wheel. A steel wire rope 211 is wound on the winding drum 208 and passes through a first fixed pulley 209 and a second fixed pulley 210 in sequence. A hanging bracket 212 is connected to the end of the steel wire rope 211. A compaction roller 213 is installed on the hanging bracket 212. The first fixed pulley 209 and the second fixed pulley 210 are respectively installed on the two end portions of the hanging arm 205. A limiting hole plate 220 is installed on the end portion of the hanging arm 205 where the second fixed pulley 210 is located. The limiting hole plate 220 limits the compaction roller 213 from swinging greatly during lifting. A proximity switch is installed on the limiting hole plate 220 and forms interlocking control with the motor 219.

[0045] Embodiment two

[0046] In the embodiment one, in order to ensure the compaction roller 213 to smoothly exit from the goaf, reduce the security risks existing in the movement of the hydraulic winch compactor 2 as much as possible, we have the protective plate beam 215 hinged on the bottom of one end of the boom 205 of the second fixed pulley 210 through the fixed mounting plate 214, the tensile spring 216 is fixedly connected between the protective plate beam 215 and the fixed mounting plate 214, the guide roller 217 is arranged at the end of the protective plate beam 215, the protective plate beam 215 is blocked by the isolation baffle 3 when the boom 205 exits the goaf and is stretched to open to protect the hoisted compaction roller 213, and the tensile spring 216 is used to ensure that the protective plate beam 215 is retracted under normal circumstances to avoid affecting the lifting of the compaction roller 213.

[0047] An L-shaped isolation filling method based on the filling device of the hydraulic support in the above-mentioned embodiment one and embodiment two is implemented, which comprises the following steps:

[0048] S1: after the coal cutter on the coal mining face cuts two knives of coal, a filling step distance of two knives of coal is reserved in the goaf;

[0049] S2: the tail beam of the plurality of groups of hydraulic supports 1 is used to support the roof of the goaf, and the isolation baffle 3 is used to isolate the coal mining face from the goaf;

[0050] S3: one end of the isolation cloth 5 on the isolation cloth bearing support 4 is fixed on the floor of the goaf after crossing the isolation baffle 3, and the laying of the isolation cloth 5 is completed;

[0051] S4: the hydraulic winch compactor 2 is moved to the vicinity of the isolation baffle 3, the two first hydraulic struts 202 are started, the piston rods of the two first hydraulic struts 202 are cooperatively extended to lift the extension arm 203, and the head of the extension arm 203 exceeds the isolation baffle 3, at the same time, the second hydraulic strut 206 is started, the piston rod of the second hydraulic strut 206 is retracted to lift the boom 205, the hydraulic winch compactor 2 is continuously moved to make the compaction roller 213 on the boom 205 pass through the isolation baffle 3, the motor 219 is started to lower the compaction roller 213 to the isolation cloth 5 on the floor of the goaf, the compaction roller 213 is automatically rolled to the bottom of the isolation baffle 3 due to the slope of the floor, the isolation cloth 5 on the isolation cloth bearing support 4 is pulled to make the isolation cloth 5 laid in an L shape in the goaf;

[0052] S5: then the motor 219 is started again to lift the compaction roller 213 until the compaction roller 213 contacts the limiting hole plate 220, the proximity switch collects the lifting signal of the compaction roller 213, the motor 219 stops running, and the hydraulic winch compactor 2 is moved to make the compaction roller 213 exit the goaf under the protection of the protective plate beam 215;

[0053] S6: one end of the cloth pipe 6 is extended and placed in the goaf through the filling through hole 302, and the cloth pipe 6 is pressed on the isolation cloth 5, the filling valve 7 is opened for filling, when the paste is about to exceed the height of the isolation baffle 3, the filling is stopped, the supplement valve 7 is switched to continue filling, when all the filling valves 7 are filled, the rapid filling of the goaf is completed.

[0054] In the above isolation filling process, according to the actual construction requirements, we construct according to the following limited construction requirements, the distance between the tail beam of the hydraulic support and the middle of the top of the isolation baffle 3 is controlled to be 400-500mm, and is greater than the sum of the diameter of the lifted compaction roller 213 and the vertical cantilever distance of the protection plate beam 215.

[0055] In the present application, the filling paste used by us is a mixture of crushed coal gangue and slag or a mixture of solid waste, fly ash, cementing material and water.

[0056] In order to shorten the isolation time, in principle, the method gives up directly controlling the immediate roof of the goaf, and shortens the sinking amount of the immediate roof through rapid isolation, so as to form a strata support structure system for controlling the sinking of the old roof. Based on the above theoretical requirements, the present application adopts the L-shaped isolation efficient filling method, which can not only control the sinking of the old roof, but also improve the mining efficiency and realize the double benefits of society and economy.

[0057] The main features and advantages of the present application are shown and described above, and it is obvious for those skilled in the art that the specific embodiments of the present application are not limited to the details of the above exemplary embodiments, and the inventive idea and design idea of the present application can be realized in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0058] In addition, it should be understood that although the present application is described in the form of embodiments, each embodiment does not contain only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments which can be understood by those skilled in the art.

Claims

1. A filling device based on hydraulic support reconstruction, comprising a hydraulic support (1), characterized in that: Also include a hydraulic winch compactor (2), isolation baffle (3), isolation cloth bearing support (4) and placed on the isolation cloth (5) in the roll, the isolation cloth (5) across the isolation baffle (3) after along its side and the floor of the gob laid, and under the compaction of the hydraulic winch compactor (2) makes the isolation baffle (3) of the gob L type arrangement, the isolation baffle (3) including the baffle body (301) installed on the hydraulic support (1) base, in the baffle body (301) top end opening has filling hole (302), its inside is provided with cloth pipe (6), cloth pipe (6) one end through the working surface cloth valve (7) and feed pipe connected with, the feed pipe and ground paste pump connected, and the ground paste pump to the isolation cloth (5) in the gob; The hydraulic winch compactor (2) includes a mobile base (201), and a counterweight (218) is arranged in the mobile base (201), two first hydraulic support columns (202) are respectively installed on the mobile base (201), the piston rod ends of the two first hydraulic support columns (202) are respectively hinged to the middle and tail portions of the extension arm (203), the drag seat (204) is fixedly connected to the head portion of the extension arm (203), the hanger arm (205) is hinged to the waist portion of the extension arm (203) through the second hydraulic support column (206), the winch seat (207) and the motor (219) are respectively installed on the extension arm (203) between the two first hydraulic support columns (202), the winding drum (208) is arranged in the winch seat (207) and is driven by the motor (219) sprocket, the steel wire rope (211) is wound on the winding drum (208), the steel wire rope (211) passes through the first fixed pulley (209) and the second fixed pulley (210) in sequence, and the hanger (212) is connected to the end of the steel wire rope (211), the compaction roller (213) is installed on the hanger (212), and the first fixed pulley (209) and the second fixed pulley (210) are respectively installed on the two end portions of the hanger arm (205).

2. The filling device based on hydraulic support reconstruction according to claim 1, characterized in that: The top portions of the baffle bodies (301) located on both sides of the filling hole (302) are respectively provided with support roller grooves (305), and the support rollers (304) are rotatably arranged in the support roller grooves (305), two support rollers (303) are arranged on the top portions of the baffle bodies (301) on both sides, and the two support rollers (303) located on the same side are arranged on both sides of the filling hole (302), and the support rollers (304) and the four support rollers (303) jointly form an isolation cloth support assembly, which is used for reducing the friction between the isolation cloth (5) and the baffle body (301).

3. The filling device based on hydraulic support reconstruction according to claim 1, characterized in that: The supporting frame (4) comprises a main supporting frame (401) and a reinforcing vice frame (402) which are fixedly connected and installed on the base of the hydraulic support (1), a roller bottom plate (403) is installed on the main supporting frame (401), a first rolling roller group (404) is installed on the roller bottom plate (403), a second rolling roller group (405) and a third rolling roller group (406) are respectively installed on the two inner sides of the main supporting frame (401), and the isolation cloth (5) is placed in the rolling roller groove formed by the first rolling roller group (404), the second rolling roller group (405) and the third rolling roller group (406).

4. The filling device based on hydraulic support reconstruction according to claim 3, characterized in that: A limiting hole plate (220) is installed on one end of the boom (205) of the second fixed pulley (210), the limiting hole plate (220) limits the large swing of the compaction roller (213) during lifting, and a proximity switch is installed on the limiting hole plate (220) to form interlocking control with the motor (219).

5. A filling device based on hydraulic support reconstruction according to claim 4, characterized in that: A protection plate beam (215) is hingedly connected to the bottom of one end of the boom (205) of the second fixed pulley (210) through a fixed mounting plate (214), a tension spring (216) is fixedly connected between the protection plate beam (215) and the fixed mounting plate (214), a guide roller (217) is arranged at the end of the protection plate beam (215), the protection plate beam (215) is blocked by the isolation baffle (3) when the boom (205) exits the goaf and is stretched to open, thereby protecting the lifted compaction roller (213), and the tension spring (216) is used to ensure that the protection plate beam (215) is retracted under normal circumstances, so as to avoid affecting the lifting of the compaction roller (213).

6. An application of the filling device based on the hydraulic support transformation of claim 5 to implement an L-shaped isolation filling method, comprising the following steps: S1: after the coal cutting machine cuts two knives of coal on the coal mining face, a filling step distance of two knives of coal is reserved in the goaf; S2: the top plate of the goaf is supported by using a plurality of groups of hydraulic supports (1), and the isolation baffle (3) is used to isolate the coal mining face from the goaf; S3: one end of the isolation cloth (5) on the supporting frame (4) is fixed on the floor of the goaf after crossing the isolation baffle (3), and the laying of the isolation cloth (5) is completed; S4: the hydraulic winch compactor (2) is moved to the vicinity of the isolation baffle (3), two first hydraulic supports (202) are started, the piston rod of the two first hydraulic supports (202) is matched to extend, the extension arm (203) is lifted, and the head of the extension arm (203) exceeds the isolation baffle (3), at the same time, the second hydraulic support (206) is started, the piston rod of the second hydraulic support (206) is retracted to lift the boom (205), the hydraulic winch compactor (2) is continuously moved, the compaction roller (213) on the boom (205) passes through the isolation baffle (3), the motor (219) is started to lower the compaction roller (213) onto the isolation cloth (5) on the floor of the goaf, the compaction roller (213) is automatically rolled to the bottom of the isolation baffle (3) by the floor slope, the isolation cloth (5) on the isolation cloth supporting bracket (4) is pulled, and the isolation cloth (5) is laid in an L shape in the goaf; S5: the motor (219) is started again to lift the compaction roller (213) until the compaction roller (213) is in contact with the limiting hole plate (220), the proximity switch collects the lifting signal of the compaction roller (213), the motor (219) stops running, the hydraulic winch compactor (2) is moved, and the compaction roller (213) exits the goaf under the protection of the protection plate beam (215); S6: one end of the cloth pipe (6) is extended and placed in the goaf through the filling through hole (302), and the cloth pipe (6) is pressed on the isolation cloth (5), the cloth valve (7) is opened for filling, when the paste is about to exceed the height of the isolation baffle (3), the filling is stopped, the cloth valve (7) is switched to continue filling, and when all the cloth valves (7) are filled, the rapid filling of the goaf is completed.

7. The method of claim 6, wherein: The distance between the tail beam of the hydraulic support and the middle of the top of the isolation baffle (3) is controlled to be 400-500 mm, and is greater than the sum of the diameter of the lifted compaction roller (213) and the vertical cantilever distance of the protection plate beam (215).

8. The method of claim 7, wherein: The paste is a mixture of crushed coal gangue and slag or a mixture of solid waste, fly ash, cementing material and water.

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