Oversized mining height leaked waste rock filling hydraulic support with multifunctional safety channel behind support

Abstract

The invention discloses an oversized mining height leaked waste rock filling hydraulic support with a multifunctional safety channel behind the support, which comprises a top beam, a shield beam, a base, a supporting seat, four upright posts for connecting the top beam and the base, and a reverse four-bar linkage, and a multifunctional lifting platform which is arranged behind the supporting seat and is positioned on the base and is positioned under the shield of the shield beam; the multifunctional lifting platform comprises a horizontal beam plate and supporting legs which are arranged up and down, the front portion of the horizontal beam plate extends forwards through a forward inclination space of a reverse four-bar linkage to serve as a safety channel, the rear portion of the horizontal beam plate is paved with a bottom-unloading type waste rock leaking scraper, and the middle of the horizontal beam plate serves as a staggered through space of two adjacent supports. The middle rear part can be used for transporting materials; the shield beam is supported by a horizontal oil cylinder to rotate along the hinged position of the tail end of the top beam. The non-dense safe filling of the 6-8m super-large mining height leaked waste rock is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine gangue filling equipment, and relates to an extra-high mining height gangue-leaking filling hydraulic support with a multi-functional safety passage behind the support frame. Background Art

[0002] The Meng-Shaan mining area in China is located on the edge of the Mu Us Desert, with a fragile ecological environment. The Sarawusu Formation aquifer with strong water-richness is widely distributed. Below it are Jurassic coal seams, with water above, coal below, and gangue on the surface. The ecological problems caused by coal mining are relatively serious. One is that a large amount of water and sand rush into the mine, which also causes the decline of the groundwater level, the drying up of surface water, the deterioration of the geological environment, and the invasion of sand and dust; the other is that a large amount of coal gangue is piled up on the surface, occupying land, polluting water bodies, generating dust and spontaneous combustion, polluting the atmosphere. Water conservation and solid waste disposal are difficult problems. For an extra-high mining height working face with a coal seam thickness of 6-8m, the height of the water-conducting fracture zone is large. Calculated according to 20-26 times the height of the water-conducting fracture zone, the conduction height reaches 120-208m, and it is easier to conduct the Sarawusu Formation aquifer. If the water conservation coal mining method with restricted mining height is adopted, the coal resource loss rate is relatively high, which does not meet the specification requirements, and at the same time, there will also be safety problems such as spontaneous combustion of the remaining coal in the goaf.

[0003] According to the water-preserving coal mining method, non-compact filling is carried out. In most cases, when the filling rate reaches 20-50%, water-preserving mining can be achieved, which is equivalent to reducing the mining height and the height of the water-conducting fracture zone. For water-preserving mining, the commonly used method at present is the coal gangue gypsum body filling method, but its cost is high and it requires roof contact filling, which is not suitable for ultra-large mining height working faces with a coal seam thickness of 6-8m. The traditional solid filling technology also requires roof contact filling and a huge amount of gangue, which is not very suitable, and is even less applicable to the main mining working faces in this situation. For solid non-compact filling with a filling rate of 20-50%, that is, solid filling under the caving method, some scientific research personnel have carried out technical research. For example, in the Chinese patent "A roof caving gangue filling hydraulic support and filling method" (patent number ZL202210080931.1), it is mainly applied to coal seams with a thickness of less than 4m. In this case, the filling height is relatively low (1.0-1.5m), the filling volume is relatively small (1 million - 2 million tons / year), and people can only walk and operate in front of the support, and maintenance and monitoring can only be carried out between the supports. For ultra-large mining height working faces with a coal seam thickness of 6-8m, for water-preserving mining, the filling height and filling volume are large. The filling height is usually above 2-3m (corresponding to the height of the lifting platform reaching 2.5-3.5m), and the filling volume is above 3 million - 4 million tons / year. The relevant support length and minimum height are too large, resulting in the support being too heavy and large in size to be transported; at the same time, the support cylinders connected to the shield beam at the rear occupy space, resulting in no passage for people to walk, maintain, monitor and operate at the rear, and only maintenance can be carried out between the supports. The equipment such as the bottom-discharge scraper conveyor is large in size and weight, difficult to hoist and maintain, with poor safety. The monitoring and operation of the hydraulic control valve can only be carried out between the supports and in front of the support, and the effect and safety cannot be guaranteed, so it cannot be used in non-compact solid filling working faces with a coal seam thickness of 6-8m. For non-compact solid filling working faces with a coal seam thickness of 6-8m, only when there is a safe passage behind the support, which is convenient for people to walk, transport materials, maintain, monitor and operate the hydraulic control valve, can the filling operation be carried out normally.

[0004] Therefore, it is necessary to develop a large mining height gangue-leaking filling hydraulic support that meets the requirements of non-compact solid filling working faces with an ultra-large mining height of 6-8m coal seam thickness and has a multi-functional safety passage at the rear. Summary of the Invention The purpose of the present invention is to provide an ultra-large mining height gangue-leaking filling hydraulic support with a multi-functional safety passage behind the support, realizing non-compact solid filling of ultra-large mining height coal seams with a thickness of 6-8m.

[0005] The technical solution adopted by the present invention is an extra-large mining height gangue-leaking filling hydraulic support with a multi-functional safety passage behind the support frame, which includes a top beam, a shield beam, a base, a support seat, four columns connecting the top beam and the base, and an inverted four-bar linkage. A multi-functional lifting platform under the cover of the shield beam is arranged on the base behind the support seat. The multi-functional lifting platform includes a horizontal beam plate and legs arranged up and down. The front part of the horizontal beam plate extends forward by using the forward inclination space of the inverted four-bar linkage as a safety passage, the rear part is paved with a bottom-dumping gangue-leaking scraper, the middle part is used as the staggering and passing space between two adjacent supports, the horizontal beam plate covers the space below it to create a gangue-leaking filling space, and materials can be transported in the middle and rear parts; the shield beam is supported by a nearly horizontal oil cylinder fixed at the rear part of the top beam and rotates along the hinge at the end of the top beam.

[0006] The features of the present invention also lie in: A guide column seat is arranged on the base behind the support seat, the legs are inserted into the guide column seat, a vertical oil cylinder is arranged vertically between the horizontal beam plate and the guide column seat, the height of the multi-functional lifting platform is adjusted through the vertical oil cylinder, and a number of pin holes are arranged on the guide column seat and the legs, and the height is fixed by inserting a pin shaft into the corresponding pin holes of the guide column seat and the legs.

[0007] A support baffle, a bottom-dumping gangue-leaking scraper, a limit baffle, and a safety railing are arranged on the horizontal beam plate in sequence from back to front. There is a distance between the bottom-dumping gangue-leaking scraper and the limit baffle, and between the limit baffle and the safety railing. A gangue-leaking port is arranged in the middle of the horizontal beam plate, and the gangue-leaking port of the horizontal beam plate overlaps with the gangue-leaking hole of the bottom-dumping gangue-leaking scraper up and down.

[0008] The width of the horizontal beam plate is equal to the width of the support, the distance between the safety railing and the limit baffle is greater than or equal to 800 mm, and the distance between the support baffle and the limit baffle is greater than twice the width of the bottom-dumping gangue-leaking scraper.

[0009] A telescopic beam is arranged at the end near the tail of the shield beam.

[0010] The side view of the multi-functional lifting platform is in the shape of "T", and the rear view is in the shape of "π". A notch is arranged at one end of the base behind the support in the goaf area, and the horizontal projection of the space surrounded by the support seat and the guide column seat corresponds to the notch of the base.

[0011] The horizontal cross-section of the guide column seat is in the shape of "U", and the opening faces the goaf area behind.

[0012] A long hole groove is arranged at the lower part of the shield beam, and the long hole groove is connected with a round hole arranged at the upper part of the support baffle through a pin shaft.

[0013] The beneficial effects of the present invention are: The super large mining height gob filling hydraulic support with a multi-functional safety passage behind the support of the present invention is reasonably designed and has a compact support type. On the premise of ensuring the support strength, the length of the support is small and the weight is light, meeting the transportation requirements. More importantly, the multi-functional lifting platform behind the support is scientifically and reasonably arranged. On the premise of creating a filling space, it has passages for pedestrians, maintenance, monitoring, and operating hydraulic control valves, and can truly achieve non-dense safety filling of gob with a super large mining height of 6 - 8m. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the super large mining height gob filling hydraulic support with a multi-functional safety passage behind the support of the present invention; Figure 2 It is a schematic diagram of controlling the caving rock mass in the working face of the super large mining height gob filling hydraulic support with a multi-functional safety passage behind the support of the present invention.

[0015] In the figure: 1. Top beam, 2. Canopy beam, 3. Base, 4. Column, 5. Reverse four-bar linkage, 6. Support seat, 7. Guide column seat, 8. Multi-functional lifting platform, 81. Horizontal beam plate, 82. Leg, 9. Bottom-dumping gob scraper, 10. Near-horizontal oil cylinder, 11. Safety railing, 12. Limit baffle, 13. Support baffle, 14. Filling gangue. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The present invention will be described in detail below in conjunction with the drawings and specific embodiments. The described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0017] In the following description of the present invention, the terms "first / second / third" involved only distinguish similar objects and do not represent a specific order for the objects. It can be understood that "first / second / third" can be interchanged with a specific order or sequence when allowed, so that the embodiments of the present application described here can be implemented in an order other than that illustrated or described here.

[0018] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the present invention are only for the purpose of describing the embodiments of the present application and are not intended to limit the present invention.

[0019] Embodiment 1 This embodiment provides an extra-high mining height gob-filling hydraulic support with a multi-functional safety passage behind the support, which includes a top beam 1 and a base 3 that are supported and connected by four columns 4 up and down. An inverted four-bar linkage 5 is also arranged between the top beam 1 and the base 3. A shield beam 2 is hinged at the tail end of the top beam 1. A support seat 6 is fixedly arranged on the base 3. The inverted four-bar linkage 5 is respectively connected to the top beam 1 and the support seat 6. Behind the support seat 6 and on the base 3, there is a multi-functional lifting platform 8 protected by the shield beam 2. The multi-functional lifting platform 8 includes a horizontal beam plate 81 and legs 82 arranged up and down. The front part of the horizontal beam plate 81 extends forward using the forward-inclined space of the inverted four-bar linkage 5 as a safety passage, which is used for pedestrians, maintenance, monitoring, and operating gob-filling. The rear part is laid with a bottom-dumping gob scraper 9, which is used for transporting gangue and gob-filling. The middle part serves as the staggered-through space between two adjacent supports. The horizontal beam plate 81 protects the space below it to create a gob-filling space, and materials can be transported in the middle and rear parts. The shield beam 2 is supported by a nearly horizontal oil cylinder 10 fixed at the rear part of the top beam 1 and rotates along the hinge at the end of the top beam 1.

[0020] During filling, the gangue conveyor belt transports the gangue to the bottom-dumping gob scraper 9. The gob-dropping holes of the bottom-dumping gob scraper 9 are opened, and the gangue leaks into the space below for filling. When the filled gangue 14 touches the bottom of the multi-functional lifting platform 8, this support is full.

[0021] This embodiment only represents the preferred embodiment of the extra-high mining height gob-filling hydraulic support with a multi-functional safety passage behind the support of the present invention. Any adapter designed with technical features similar to those of the present invention will fall within the protection scope of the extra-high mining height gob-filling hydraulic support with a multi-functional safety passage behind the support of the present invention.

[0022] Embodiment 2 This embodiment provides an extra-high mining height gob-filling hydraulic support with a multi-functional safety passage behind the support, which includes a top beam 1 and a base 3 that are supported and connected by four columns 4 up and down. An inverted four-bar linkage 5 is also arranged between the top beam 1 and the base 3. A shield beam 2 is hinged at the tail end of the top beam 1. A support seat 6 is fixedly arranged on the base 3. The inverted four-bar linkage 5 is respectively connected to the top beam 1 and the support seat 6. Behind the support seat 6 and on the base 3, there is a multi-functional lifting platform 8 protected by the shield beam 2. The multi-functional lifting platform 8 includes a horizontal beam plate 81 and legs 82 arranged up and down. The front part of the horizontal beam plate 81 extends forward using the forward-inclined space of the inverted four-bar linkage 5 as a safety passage, the rear part is laid with a bottom-dumping gob scraper 9, the middle part serves as the staggered-through space between two adjacent supports, the horizontal beam plate 81 protects the space below it to create a gob-filling space, and materials can be transported in the middle and rear parts. The shield beam 2 is supported by a nearly horizontal oil cylinder 10 fixed at the rear part of the top beam 1 and rotates along the hinge at the end of the top beam 1.

[0023] A guide post base 7 is provided on the rear base of the support base 6. The support leg 82 is inserted into the guide post base 7. A vertical oil cylinder is provided between the horizontal beam plate 81 and the guide post base 7 in the vertical direction. The height of the multi-functional lifting platform 8 is adjusted by the vertical oil cylinder. A number of pin holes are provided on the guide post base 7 and the support leg 82, and the height is fixed by inserting a pin shaft into the corresponding pin holes of the guide post base 7 and the support leg 82, so that the gob filling height can be adjusted, which is convenient for improving adaptability.

[0024] This embodiment only represents the preferred embodiment of the ultra-large mining height gob filling hydraulic support with a multi-functional safety passage behind the support. Any adapter designed with technical features similar to those of the present invention will fall within the protection scope of the ultra-large mining height gob filling hydraulic support with a multi-functional safety passage behind the support of the present invention.

[0025] Embodiment 3 This embodiment provides an ultra-large mining height gob filling hydraulic support with a multi-functional safety passage behind the support, including a top beam 1 and a base 3 that are supported and connected by four columns 4 up and down. An inverted four-bar linkage 5 is also provided between the top beam 1 and the base 3. A shield beam 2 is hinged at the tail end of the top beam 1. A support base 6 is fixedly provided on the base 3. The inverted four-bar linkage 5 is respectively connected to the top beam 1 and the support base 6. A multi-functional lifting platform 8 is provided behind the support base 6 and on the base 3 and is under the cover of the shield beam 2. The multi-functional lifting platform 8 includes a horizontal beam plate 81 and support legs 82 arranged up and down. The front part of the horizontal beam plate 81 extends forward using the forward inclination space of the inverted four-bar linkage 5 as a safety passage. The rear part is provided with a bottom-dumping gob scraper 9. The middle part serves as the staggering and through space between two adjacent supports. The horizontal beam plate 81 covers the space below it to create a gob filling space, and materials can be transported in the middle and rear parts; the shield beam 2 is supported by a nearly horizontal oil cylinder 10 fixed at one end to the rear of the top beam 1 and rotates along the hinged part at the end of the top beam 1.

[0026] A support baffle 13, a bottom-dumping gob scraper 9, a limit baffle 12, and a safety railing 11 are sequentially arranged on the horizontal beam plate 81 from the rear to the front. The space between the safety railing 11 and the limit baffle 12 is the safety passage. There are distances between the bottom-dumping gob scraper 9 and the limit baffle 12, and between the limit baffle 12 and the safety railing 11. A gob discharge port is provided in the middle of the horizontal beam plate 81. The gob discharge port of the horizontal beam plate 81 and the gob discharge hole of the bottom-dumping gob scraper 9 overlap up and down. A long hole groove is provided at the lower part of the shield beam 2. The long hole groove and the round hole provided at the upper part of the support baffle 13 are connected by a pin shaft.

[0027] The layout setting of the horizontal beam plate 81 improves the shielding strength at the rear of the horizontal beam plate 81, restricts the position of the bottom-dumping gob scraper 9, creates a safety passage, realizes the normal operation of gob transportation and gob discharge, ensures the filling safety, and when the tail of the shield beam 2 contacts the support baffle 13, it transmits the load to the multi-functional lifting platform 8, improving the support safety of the safety passage on the multi-functional lifting platform 8.

[0028] This embodiment only represents the preferred embodiment of the super-high mining height gangue-leaking filling hydraulic support with a multi-functional safety passage behind the support. Any adapter designed by adopting technical features similar to those of the present invention will fall within the protection scope of the super-high mining height gangue-leaking filling hydraulic support with a multi-functional safety passage behind the support of the present invention.

[0029] Embodiment 4 This embodiment provides a super-high mining height gangue-leaking filling hydraulic support with a multi-functional safety passage behind the support, which includes a roof beam 1 and a base 3 that are supported and connected by four columns 4 up and down. An inverted four-bar linkage 5 is further arranged between the roof beam 1 and the base 3. A shield beam 2 is hinged at the tail end of the roof beam 1. A support base 6 is fixedly arranged on the base 3. The inverted four-bar linkage 5 is respectively connected with the roof beam 1 and the support base 6. A multi-functional lifting platform 8 that is under the cover of the shield beam 2 is arranged behind the support base 6 and on the base 3. The multi-functional lifting platform 8 includes a horizontal beam plate 81 and legs 82 that are arranged up and down. The front part of the horizontal beam plate 81 extends forward by using the forward-inclined space of the inverted four-bar linkage 5 as a safety passage. The rear part is provided with a bottom-dumping gangue-leaking scraper 9. The middle part serves as the staggering-through space between two adjacent supports. The horizontal beam plate 81 covers the space below it to create a gangue-leaking filling space, and materials can be transported in the middle and rear parts. The shield beam 2 is supported by a nearly horizontal oil cylinder 10 fixed at the rear part of the roof beam 1 and rotates along the hinge at the end of the roof beam 1.

[0030] A support baffle 13, a bottom-dumping gangue-leaking scraper 9, a limit baffle 12, and a safety railing 11 are sequentially arranged on the horizontal beam plate 81 from the rear to the front. The space between the safety railing 11 and the limit baffle 12 is the safety passage. A gangue-leaking opening is arranged in the middle of the horizontal beam plate 81. The gangue-leaking opening of the horizontal beam plate 81 overlaps with the gangue-leaking hole of the bottom-dumping gangue-leaking scraper 9 up and down.

[0031] The width of the horizontal beam plate 81 is equal to the width of the support. The width of the support is a specific width. The width of the support with super-high mining height is 2.25 m. The distance between the safety railing 11 and the limit baffle 12 is 800 mm. The distance between the support baffle 13 and the limit baffle 12 is 2.1 times the width of the bottom-dumping gangue-leaking scraper 9. The arrangement of the horizontal beam plate 81 improves the pedestrian safety, avoids the interference between the bottom-dumping gangue-leaking scraper and the limit baffle, and ensures the length of the staggering-through space between two adjacent supports.

[0032] This embodiment only represents the preferred embodiment of the super-high mining height gangue-leaking filling hydraulic support with a multi-functional safety passage behind the support. Any adapter designed by adopting technical features similar to those of the present invention will fall within the protection scope of the super-high mining height gangue-leaking filling hydraulic support with a multi-functional safety passage behind the support of the present invention.

[0033] Embodiment 5 This embodiment provides an extra-high mining height gob-filling hydraulic support with a multi-functional safety passage behind the support, which includes a top beam 1 and a base 3 that are supported and connected by four columns 4 up and down. An inverted four-bar linkage 5 is also arranged between the top beam 1 and the base 3. A shield beam 2 is hinged at the end of the top beam 1. A support seat 6 is fixedly arranged on the base 3. The inverted four-bar linkage 5 is respectively connected to the top beam 1 and the support seat 6. Behind the support seat 6 and on the base 3, there is a multi-functional lifting platform 8 protected by the shield beam 2. The multi-functional lifting platform 8 includes a horizontal beam plate 81 and legs 82 arranged up and down. The front part of the horizontal beam plate 81 extends forward using the forward-inclined space of the inverted four-bar linkage 5 as a safety passage. The rear part is paved with a bottom-dumping gob scraper 9. The middle part serves as the staggering-through space between two adjacent supports. The horizontal beam plate 81 protects the space below it to create a gob-filling space, and materials can be transported in the middle and rear parts. The shield beam 2 is supported by a nearly horizontal oil cylinder 10 fixed at one end to the rear of the top beam 1 and rotates along the hinge at the end of the top beam 1.

[0034] On the horizontal beam plate 81, there are successively arranged a support baffle 13, a bottom-dumping gob scraper 9, a limit baffle 12, and a safety railing 11 from the rear to the front. The space between the safety railing 11 and the limit baffle 12 is the safety passage. There is a gob discharge port in the middle of the horizontal beam plate 81. The gob discharge port of the horizontal beam plate 81 overlaps with the gob discharge hole of the bottom-dumping gob scraper 9 up and down. A hydraulic control valve is arranged at the gob discharge hole of the bottom-dumping gob scraper 9 to realize the opening and closing of the gob discharge hole.

[0035] The width of the horizontal beam plate 81 is equal to the width of the support. The width of the support is a specific width. For an extra-high mining height support, the width of the support is 2.25 m. The distance between the safety railing 11 and the limit baffle 12 is 800 mm. The distance between the support baffle 13 and the limit baffle 12 is 2.2 times the width of the bottom-dumping gob scraper 9.

[0036] This embodiment only represents the preferred implementation mode of the extra-high mining height gob-filling hydraulic support with a multi-functional safety passage behind the support of the present invention. Any adapter designed using technical features similar to those of the present invention will fall within the protection scope of the extra-high mining height gob-filling hydraulic support with a multi-functional safety passage behind the support of the present invention.

[0037] Embodiment 6 This embodiment provides an extra-high mining height gob-filling hydraulic support with a multi-functional safety passage behind the support, which includes a top beam 1 and a base 3 that are supported and connected by four columns 4 up and down. An inverted four-bar linkage 5 is also arranged between the top beam 1 and the base 3. A shield beam 2 is hinged at the tail end of the top beam 1. A support seat 6 is fixedly arranged on the base 3. The inverted four-bar linkage 5 is respectively connected to the top beam 1 and the support seat 6. A multi-functional lifting platform 8 that is protected by the shield beam 2 is arranged behind the support seat 6 and on the base 3. The multi-functional lifting platform 8 includes a horizontal beam plate 81 and legs 82 arranged up and down. The front part of the horizontal beam plate 81 extends forward using the forward inclination space of the inverted four-bar linkage 5 as a safety passage. The rear part is laid with a bottom-dumping gob scraper 9. The middle part serves as the staggering and through space between two adjacent supports. The horizontal beam plate 81 protects the space below it to create a gob-filling space, and materials can be transported in the middle and rear parts; the shield beam 2 is supported by a nearly horizontal oil cylinder 10 fixed at the rear part of the top beam 1 and rotates along the hinged joint at the end of the top beam 1. A telescopic beam is provided at the end of the shield beam 2 near the tail end to improve the shielding effect on the caving rock blocks in the goaf and prevent them from entering below the horizontal beam plate.

[0038] This embodiment only represents the preferred implementation mode of the extra-high mining height gob-filling hydraulic support with a multi-functional safety passage behind the support of the present invention. Any adapter designed using technical features similar to those of the present invention will fall within the protection scope of the extra-high mining height gob-filling hydraulic support with a multi-functional safety passage behind the support of the present invention.

[0039] Embodiment 7 This embodiment provides an extra-high mining height gob-filling hydraulic support with a multi-functional safety passage behind the support, which includes a top beam 1 and a base 3 that are supported and connected by four columns 4 up and down. An inverted four-bar linkage 5 is also arranged between the top beam 1 and the base 3. A shield beam 2 is hinged at the tail end of the top beam 1. A support seat 6 is fixedly arranged on the base 3. The inverted four-bar linkage 5 is respectively connected to the top beam 1 and the support seat 6. A multi-functional lifting platform 8 that is protected by the shield beam 2 is arranged behind the support seat 6 and on the base 3. The multi-functional lifting platform 8 includes a horizontal beam plate 81 and legs 82 arranged up and down. The front part of the horizontal beam plate 81 extends forward using the forward inclination space of the inverted four-bar linkage 5 as a safety passage. The rear part is laid with a bottom-dumping gob scraper 9. The middle part serves as the staggering and through space between two adjacent supports. The horizontal beam plate 81 protects the space below it to create a gob-filling space, and materials can be transported in the middle and rear parts; the shield beam 2 is supported by a nearly horizontal oil cylinder 10 fixed at the rear part of the top beam 1 and rotates along the hinged joint at the end of the top beam 1. A telescopic beam is provided at the end of the shield beam 2 near the tail end.

[0040] The horizontal beam plate 81 is successively provided with a support baffle 13, a bottom-dumping waste scraper 9, a limit baffle 12, and a safety railing 11 from back to front. There is a distance between the bottom-dumping waste scraper 9 and the limit baffle 12, and between the limit baffle 12 and the safety railing 11. A waste discharge opening is provided in the middle of the horizontal beam plate 81, and the waste discharge opening of the horizontal beam plate 81 overlaps with the waste discharge hole of the bottom-dumping waste scraper 9 up and down.

[0041] This embodiment only represents the preferred embodiment of the ultra-high mining height waste filling hydraulic support with a multi-functional safety passage behind the support. Any adapter designed with technical features similar to those of the present invention will fall within the protection scope of the ultra-high mining height waste filling hydraulic support with a multi-functional safety passage behind the support of the present invention.

[0042] Embodiment 8 This embodiment provides an ultra-high mining height waste filling hydraulic support with a multi-functional safety passage behind the support, as Figure 1 shown, which includes a top beam 1 and a base 3 that are supported and connected by four columns 4 up and down. A reverse four-bar linkage 5 is also provided between the top beam 1 and the base 3. The four columns 4 form two rows arranged oppositely, and the reverse four-bar linkage 5 is arranged between the two rows of columns 4. A shield beam 2 is hinged at the tail end of the top beam 1, and a support seat 6 is fixedly arranged on the base 3. The reverse four-bar linkage 5 is respectively connected to the top beam 1 and the support seat 6. A multi-functional lifting platform 8 that is protected by the shield beam 2 is arranged behind the support seat 6 and on the base 3.

[0043] The multi-functional lifting platform 8 includes a horizontal beam plate 81 and legs 82 arranged up and down. The front part of the horizontal beam plate 81 extends forward using the forward inclination space of the reverse four-bar linkage 5 as a safety passage, the rear part is paved with a bottom-dumping waste scraper 9, the middle part is used as the staggered-through space between two adjacent supports, the horizontal beam plate 81 protects the space below it to create a waste filling space, and materials can be transported in the middle and rear parts; the shield beam 2 is supported by a nearly horizontal oil cylinder 10 fixed at one end to the rear part of the top beam 1 and rotates along the hinge at the end of the top beam 1. A telescopic beam is provided at the end of the shield beam 2 near the tail end.

[0044] A guide post seat 7 is arranged on the base behind the support seat 6. The legs 82 are inserted into the guide post seat 7. A vertical oil cylinder is arranged between the horizontal beam plate 81 and the guide post seat 7 in the vertical direction to adjust the height of the multi-functional lifting platform 8. A number of pin holes are provided on the guide post seat 7 and the legs 82, and the height is fixed by inserting a pin shaft into the corresponding pin holes of the guide post seat 7 and the legs 82. The height of the top of the guide post seat 7 is greater than the height of the top of the support seat 6. The horizontal cross-section of the guide post seat 7 is "U"-shaped, and the opening faces the goaf at the rear to facilitate the installation of the multi-functional lifting platform 8.

[0045] The horizontal beam plate 81 is successively provided with a support baffle 13, a bottom-dumping waste rock scraper 9, a limit baffle 12, and a safety railing 11 from the back to the front. A safety passage is formed between the safety railing 11 and the limit baffle 12. A waste rock discharge opening is provided in the middle of the horizontal beam plate 81. The waste rock discharge opening of the horizontal beam plate 81 overlaps with the waste rock discharge hole of the bottom-dumping waste rock scraper 9 up and down. A hydraulic control valve is provided at the waste rock discharge hole of the bottom-dumping waste rock scraper 9 to realize the opening and closing of the waste rock discharge hole. A long hole groove is provided at the lower part of the shield beam 2. The long hole groove is connected with a round hole provided at the upper part of the support baffle 13 through a pin shaft to improve the torsional strength of the hydraulic support.

[0046] The width of the horizontal beam plate 81 is equal to the width of the support, that is, the width of the horizontal beam plate 81 is 2.25 m. The distance between the safety railing 11 and the limit baffle 12 is 800 mm. The distance between the support baffle 13 and the limit baffle 12 is 2.1 times the width of the bottom-dumping waste rock scraper 9.

[0047] The side view of the multifunctional lifting platform 8 is in a "T" shape, and the rear view is in a "π" shape. A notch is provided at one end of the rear of the base 3 located in the goaf. The horizontal projection of the space enclosed by the support seat 6 and the guide post seat 7 corresponds to the notch of the base 3. The design of this notch improves the filling amount of waste rock.

[0048] This embodiment only represents the preferred implementation mode of the super large mining height waste rock filling hydraulic support with a multifunctional safety passage behind the support of the present invention. Any adapter designed by adopting technical features similar to those of the present invention will fall within the protection scope of the super large mining height waste rock filling hydraulic support with a multifunctional safety passage behind the support of the present invention.

[0049] The working principle of the super large mining height waste rock filling hydraulic support with a multifunctional safety passage behind the support of the present invention is as Figure 2 shown as follows: In the fully mechanized coal mining face, multiple super large mining height waste rock filling hydraulic supports with a multifunctional safety passage behind the support of the present invention are arranged. An incoming waste rock belt is set in the return air heading. The incoming waste rock belt is overlapped with a movable transfer belt. The movable transfer belt is overlapped with the bottom-dumping waste rock scraper 9 at the rear of the horizontal beam plate 81. After the filling system is debugged, the filling starts.

[0050] The incoming waste rock belt transports the waste rock to the bottom-dumping waste rock scraper 9. The waste rock discharge hole of the bottom-dumping waste rock scraper 9 is opened, and the waste rock leaks into the space below the horizontal beam plate 81 for filling. When the filled waste rock 14 contacts the bottom of the horizontal beam plate 81, this support is full. The operator stands in the safety passage of the multifunctional lifting platform 8, operates the hydraulic control valve group, observes the filling situation below, opens or closes the waste rock discharge hole, and successively fills the rear filling space below the multifunctional lifting platform 8. At the same time, the filling rate and filling effect are monitored.

[0051] During maintenance, the bottom-dumping scraper 9 for discharging gangue is maintained. If the scraper is damaged and needs to be replaced, the new scraper is hoisted to the middle of the horizontal beam plate 81 through the end supports at both ends of the working face, and then it is carried to the equipment point that needs to be replaced on the horizontal beam plate 81.

[0052] Due to the presence of the multi-functional lifting platform 8 and the safety passage, the manual operation, pedestrian access, maintenance and monitoring of the backfilling operation can be completed.

[0053] The large mining height gangue filling hydraulic support of the present invention with a multi-functional safety passage behind the support solves the problem of ultra-large mining height non-dense solid filling with a coal seam thickness of 6 - 8m, can achieve a filling rate of 20 - 50%, and meets the requirements of water-preserving mining.

[0054] The above has introduced in detail a super-large mining height gangue filling hydraulic support with a multi-functional safety passage behind the support provided by the present invention. Specific examples are used in this article to elaborate on the implementation manners of the present invention. The description of the above embodiments is only used to help understand the structure and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to this application.

Claims

1. An extra-high mining height hydraulic support with a multi-functional safety passage behind the support frame, comprising a top beam (1), a shield beam (2), a base (3), a support seat (6), and four columns (4) and an inverted four-bar linkage (5) connecting the top beam (1) and the base (3), characterized in that, Behind the support base (6) and on the base (3), there is a multi-functional lifting platform (8) protected by the shield beam (2). The multi-functional lifting platform (8) includes a horizontal beam plate (81) and legs (82) arranged vertically. The front part of the horizontal beam plate (81) extends forward using the forward inclination space of the reverse four-bar linkage (5) as a safety passage. The rear part is paved with a bottom-dumping slag scraper (9). The middle part serves as the staggered-through space between two adjacent supports. The horizontal beam plate (81) protects the space below it to create a slag-filling space, and materials can be transported in the middle and rear parts. The shield beam (2) is supported by a nearly horizontal oil cylinder (10) fixed at one end to the rear of the top beam (1) and rotates along the hinge at the end of the top beam (1).

2. The super-high mining height gob-filling hydraulic support with a multi-functional safety passage behind the support according to claim 1, characterized in that, A guide column base (7) is arranged on the base behind the support base (6). The legs (82) are inserted into the guide column base (7). A vertical oil cylinder is arranged vertically between the horizontal beam plate (81) and the guide column base (7). The height of the multi-functional lifting platform (8) is adjusted through the vertical oil cylinder. A number of pin holes are arranged on the guide column base (7) and the legs (82), and the height is fixed by inserting a pin shaft into the corresponding pin holes of the guide column base (7) and the legs (82).

3. The super-large mining height gangue-leaking filling hydraulic support with a multi-functional safety passage behind the support according to claim 1, characterized in that, On the horizontal beam plate (81), a support baffle (13), a bottom-dumping slag scraper (9), a limit baffle (12), and a safety railing (11) are arranged in sequence from the rear to the front. There is a distance between the bottom-dumping slag scraper (9) and the limit baffle (12), and between the limit baffle (12) and the safety railing (11). A slag leakage opening is provided in the middle of the horizontal beam plate (81), and the slag leakage opening of the horizontal beam plate (81) overlaps the slag leakage holes of the bottom-dumping slag scraper (9) vertically.

4. The super-high mining height gob-filling hydraulic support with a multi-functional safety passage behind the support as claimed in claim 3, characterized in that, The width of the horizontal beam plate (81) is equal to the width of the support. The distance between the safety railing (11) and the limit baffle (12) is greater than or equal to 800 mm. The distance between the support baffle (13) and the limit baffle (12) is greater than twice the width of the bottom-dumping slag scraper (9).

5. The super-large mining height gangue-leaking filling hydraulic support with a multi-functional safety passage behind the support as claimed in claim 1, wherein A telescopic beam is provided at the end near the tail of the shield beam (2).

6. The ultra-high mining height gangue-leaking filling hydraulic support with a multi-functional safety passage behind the support frame according to claim 1, characterized in that, The side view of the multi-functional lifting platform (8) is in a "T" shape, and the rear view is in a "π" shape. A notch is provided at one end of the base (3) behind in the goaf. The horizontal projection of the space enclosed by the support base (6) and the guide column base (7) corresponds to the notch of the base (3).

7. The ultra-high mining height gangue-leaking filling hydraulic support with a multi-functional safety passage behind the support according to claim 2, wherein, The horizontal cross-section of the guide column base (7) is in a "U" shape, and the opening faces the goaf at the rear.

8. The super-high mining height gangue-leaking filling hydraulic support with a multi-functional safety passage behind the support according to claim 3, characterized in that, A long hole groove is provided at the lower part of the shield beam (2), and the long hole groove is connected to the round hole provided at the upper part of the support baffle (13) through a pin shaft.

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