CN210829265U - Top coal caving mining system for medium-thickness coal seam with extra-large dip angle - Google Patents
Top coal caving mining system for medium-thickness coal seam with extra-large dip angle Download PDFInfo
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- CN210829265U CN210829265U CN201921732266.XU CN201921732266U CN210829265U CN 210829265 U CN210829265 U CN 210829265U CN 201921732266 U CN201921732266 U CN 201921732266U CN 210829265 U CN210829265 U CN 210829265U
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Abstract
The utility model provides a super large inclination medium and thick coal seam caving coal mining system. A vertical and horizontal U-shaped ventilation system is formed by communicating a process communication roadway with an upper air return roadway and a lower air inlet transportation roadway, so that timely ventilation is ensured in the coal mining process, a large-angle pseudo-inclined long arm mining mode of a medium-thickness coal seam with an extra-large inclination angle is changed into a vertical caving and caving coal mining mode through development arrangement of the roadway and installation work of mining equipment, coal between the upper air return roadway and the lower air inlet transportation roadway can be effectively mined, mechanized mining of the medium-thickness coal seam with the extra-large inclination angle is realized, the safety problem of mechanized mining with the extra-large inclination angle is effectively solved, the mining efficiency is high, and the mining equipment is stable and easy to install.
Description
Technical Field
The utility model belongs to the technical field of mining engineering, especially, relate to a super large inclination medium and thick coal seam caving coal mining system.
Background
The occurrence conditions for mining the steep coal seam are always the focus of attention of the industry at present. Because the mechanized mining of the steeply inclined coal seam is difficult, blasting mining or abandoned mining is usually adopted for mining of the steeply inclined coal seam, so that a large amount of resources are wasted, or the production efficiency is low, and safety accidents are frequent. Therefore, under the condition of a steep coal seam, how to safely and effectively mine coal resources is one of the problems to be solved in the coal industry.
The evolution of the mining method of the domestic steep coal seam can be summarized into the following five stages:
the first stage of development: in 1950, the first-line technical researchers in China adopt different methods according to different geological conditions, wherein the different methods comprise step reversing, horizontal layering, longwall and dip down, pneumatic pick coal dropping and the like.
And (3) a second development stage: in the beginning of sixty years, the steeply inclined coal seam is mainly drilled and blasted by an electric drill to drop coal, and a first air pick coal dropping mode is replaced. In order to enlarge the application range of the shield support, the shield support in the shape of Chinese character ' ba ', 7 ', etc. is applied in the mine areas of Huainan province, etc. Compared with a flat shield support, the shield support has good economic benefit. Meanwhile, the metal pillars and the metal hinged top beams are gradually adopted, the extraction process of the steeply inclined working face is improved, and a better technical and economic effect is achieved.
The third stage of development: in the middle of seventies, a pseudo-inclined flexible shield support coal mining method is mainly used, and a Huainan mining area is a typical case. The method has the advantages of good yield, simple process, small tunneling amount, safety, high efficiency and the like, and the mining area is still used at present. In order to improve the degree of mechanization under such conditions, the mining areas such as the henwest, the Panzhihua, the Huainan and the like have tested shearers, impact plows and ditches. In addition, similar tests are also carried out in other mining areas, but the success rate is not high, and the method cannot be popularized in a large area.
The fourth stage of development: in the late 80 s and early 90 s, the mining method of the steeply inclined coal seam is further improved. The length of the working surface, the increase of the unit production and the safe production conditions are further improved. For example, the successful diving, inclining and long-wall horizontal subsection coal mining method in the inspection field coal mine test of the Sichuan Hibiscus mutabilis bureau is a short-wall coal mining method and has the characteristics of large production capacity, good ventilation condition, convenient roof management and the like.
The fifth development stage: in the middle of the 90 s, the comprehensive mechanized mining popularization stage of the steeply inclined medium-thick, thick and extra-thick coal seam is reached.
In the last thirty years, seven methods for mining steeply inclined coal seams, such as medium-thickness coal seams, thick coal seams and extra-thick coal seams, are basically formed, and comprise the following steps: fully mechanized top coal caving in horizontal layering; roadway pillar-horizontal layered fully mechanized top coal caving; the dip angle trend is changed by inclining and layering, and the top coal is fully mined by long walls; fully mechanized top coal caving is arranged in a manner of inclined strike long wall variable line arrangement; the top coal is fully mechanized and caving in long wall in inclined layered trend; the inclined trend long wall pseudo-inclined arrangement fully mechanized mining once adopts the full height; a roadway column type fully mechanized top coal caving coal mining method. The methods still do not effectively solve the problem of mechanized mining of coal seams with the coal seam thickness of 1-5 meters and the coal seam incidence angle of 45-90 degrees, the traditional blasting mining process of the flexible shield support is still used, as shown in figures 1 and 2, the method has great technical safety problems, and the state proposes to close the mines for many times.
As shown in fig. 1 and 2, the working face of the pseudo-inclined long arm of the traditional flexible shield support is arranged into a coal seam 104, a rock stratum 102, a broken rock stratum 101, an upper air return roadway 105, a support 103 and a lower air inlet transportation roadway 106, the inclination angle of the coal seam is in the range of 45-90 degrees, and due to the fact that the inclination angle is too large, the anti-falling and anti-skidding of fully mechanized mining equipment cannot be set, the personnel is not easy to construct and manage, the potential safety hazard is large, and the mechanized mining is difficult to realize.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a super large inclination medium and thick coal seam caving coal mining system. The utility model adopts the following technical scheme:
in some optional embodiments, the present invention further provides a system for caving coal in a medium-thickness coal seam with a super dip angle, comprising: the mining equipment is arranged in the lower air inlet transportation roadway; the mining apparatus includes: the coal recovery device comprises a coal recovery front hydraulic support, a coal recovery rear hydraulic support and a reversed loader, wherein the end part of the reversed loader is arranged in the coal recovery front hydraulic support and the coal recovery rear hydraulic support, a swing oil cylinder and a coal discharge tail beam are arranged on the coal recovery rear hydraulic support, and the action end of the swing oil cylinder is connected with the coal discharge tail beam, so that the coal discharge tail beam is driven to swing on the coal recovery rear hydraulic support when the swing oil cylinder does telescopic motion; the coal caving tail beam is provided with a telescopic oil cylinder and a coal caving inserting plate, and the action end of the telescopic oil cylinder is connected with the coal caving inserting plate, so that the coal caving inserting plate is driven to move on the coal caving tail beam in a reciprocating manner when the telescopic oil cylinder acts; further comprising: the local main fan is arranged in the upper return air roadway.
In some optional embodiments, the mining apparatus further comprises: a transfer pulley, a track and a belt conveyor; the elevating conveyor is characterized in that one end of the reversed loader is arranged in the hydraulic support before coal returning and the hydraulic support after coal returning, the other end of the reversed loader is hinged to the reversed loader pulley, the reversed loader pulley is arranged on the track, and the belt conveyor is parallel to the track and laid in the lower air inlet transportation roadway.
The utility model discloses the beneficial effect who brings: a vertical and horizontal U-shaped ventilation system is formed by communicating a process communication roadway with an upper air return roadway and a lower air inlet transportation roadway, so that timely ventilation is ensured in the coal mining process, a large-angle pseudo-inclined long arm mining mode of a medium-thickness coal seam with an extra-large inclination angle is changed into a vertical caving and caving coal mining mode through development arrangement of the roadway and installation work of mining equipment, coal between the upper air return roadway and the lower air inlet transportation roadway can be effectively mined, mechanized mining of the medium-thickness coal seam with the extra-large inclination angle is realized, the safety problem of mechanized mining with the extra-large inclination angle is effectively solved, the mining efficiency is high, and the mining equipment is stable and easy to install.
Drawings
FIG. 1 is a schematic view of a pseudo-diagonal long arm face layout of a conventional flexible shield support;
FIG. 2 is a schematic cross-sectional view of a coal face support of a conventional flexible shield support;
FIG. 3 is a schematic diagram of the spatial arrangement of the roadway of the present invention;
FIG. 4 is a schematic diagram of the roadway layout of the present invention;
FIG. 5 is a schematic diagram of the arrangement of the hydraulic support before coal recovery and the hydraulic support after coal recovery of the utility model;
fig. 6 is a schematic view of the installation arrangement of the mining equipment of the present invention;
fig. 7 is a schematic view of the mounting arrangement of the reversed loader of the utility model;
fig. 8 is a schematic view of the upper return air tunnel, the process connection tunnel and the lower intake air transportation tunnel of the present invention;
fig. 9 is the utility model discloses the schematic diagram of the section is arranged to the tunnel space.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others.
As shown in fig. 3-9, in some illustrative embodiments, the present disclosure also provides a superdip angle medium thickness coal seam caving coal mining system, comprising: the mining equipment is arranged in the lower air inlet transportation roadway 5.
The mining apparatus includes: the device comprises a coal return front hydraulic support 11, a coal return rear hydraulic support 12, a reversed loader 10, a reversed loader pulley 8, a track 7, a belt conveyor 9, a swing oil cylinder 13, a coal discharge tail beam 20, a telescopic oil cylinder 21 and a coal discharge inserting plate 14.
One end of the reversed loader 10 is arranged in the coal return front hydraulic support 11 and the coal return rear hydraulic support 12, and the other end is hinged with the reversed loader pulley 8. The transshipment pulley 8 is arranged on the track 7, and the belt conveyor 9 is parallel to the track 7 and is laid in the lower air inlet transportation roadway 5.
The swing oil cylinder 13 and a coal discharge tail beam 20 for loosening the coal bed are arranged on the coal return rear hydraulic support 12, and the coal discharge tail beam 20 is hinged with the coal return rear hydraulic support 12; the action end of the swing oil cylinder 13 is connected with the coal discharge tail beam 20, the fixed end of the swing oil cylinder is connected with the coal return rear hydraulic support 12, and when the swing oil cylinder 13 does telescopic motion, the coal discharge tail beam 20 is driven to swing on the coal return rear hydraulic support 12, so that loose and scattered coal 19 is achieved.
The coal caving tail beam 20 is internally provided with a telescopic oil cylinder 21 and a coal caving inserting plate 14 for blocking coal and caving coal, the action end of the telescopic oil cylinder 21 is connected with the coal caving inserting plate 14, when the telescopic oil cylinder 21 acts, the coal caving inserting plate 14 is driven to reciprocate on the coal caving tail beam 20, namely the coal caving inserting plate 14 stretches on the coal caving tail beam 20, and when a falling rock body 18 pushes the scattered coal 19 to fall, the coal caving inserting plate 14 stretches to realize coal caving.
The action end of the oil cylinder is the end which moves when the oil cylinder works, and the other end is a fixed end. The hydraulic support 12 behind the coal recovery, the hydraulic support 11 before the coal recovery and the reversed loader 10 mutually guide and walk.
The utility model discloses a super large inclination medium and thick coal seam caving coal mining system still includes: and the local main fan 17 is arranged in the upper return air roadway 3 and is positioned at the intersection point of the upper return air roadway 3 and the process connection roadway 4. The local main fan 17 is used for pumping harmful gas generated by scattered coal 19 on the upper part of the coal dropping working surface 6 into the upper return air tunnel 3 and accelerating the flow of the wind speed in the upper return air tunnel 3.
The utility model discloses a super large inclination medium and thick coal seam caving coal mining system needs the tunnel construction before using, and the tunnel construction includes: lower portion air inlet haulage roadway 5 is drilled in coal seam 1, and the end of lower portion air inlet haulage roadway 5 is as coal breakage working face 6, and lower portion air inlet haulage roadway 5 is level with coal breakage working face 6 promptly, and drills out upper portion return air tunnel 3 on coal breakage working face 6 upper portion. A process connecting roadway 4 is drilled on the rock stratum 2 on the side face of the coal seam 1, and the process connecting roadway 4 is communicated with an upper air return roadway 3 and a lower air inlet transportation roadway 5 respectively. And a plurality of safety control holes 15 communicated with the coal seam 1 or the rock stratum 2 are arranged in the process communication roadway 4. The safety control hole 15 is used for processing the looseness and gas extraction of the coal seam 1, processing the caving of the overlying rock stratum 2 of the coal seam 1 and various water on the upper part of the coal seam, and eliminating the potential safety hazard of coal mining.
The process of installing mining equipment in the lower air intake haulage roadway 5 includes: a rail 7 is installed in the lower air inlet transportation roadway 5 and used for transporting installed equipment, a hydraulic support 11 before coal recovery and a hydraulic support 12 after coal recovery are installed at first, then a reversed loader 10 and a reversed loader pulley 8 are installed, the reversed loader 10 is hinged with the hydraulic support 11 before coal recovery, a machine head of the reversed loader 10 is lapped on the reversed loader pulley 8 of the mining equipment, the reversed loader pulley 8 is installed on the rail 7, and a belt conveyor 9 parallel to the rail 7 is laid in the lower air inlet transportation roadway 5.
The local main fan 17 works so that the wind 16 enters along the lower air inlet transportation roadway 5, flows into the upper air return roadway 3 through the process connection roadway 4 and is discharged, and the local main fan 17 discharges the gas above the coal drop working surface 6 and accelerates the flow of the gas in the upper air return roadway 3.
The falling rock body 18 pushes the loosened coal at the lower part to flow downwards, the coal discharging inserting plate 14 on the hydraulic support 12 performs telescopic action after coal return, so that the falling coal falls onto the reversed loader 10 in the mining equipment, the falling coal 19 falls onto the tail of the reversed loader 10, the fallen coal 19 is conveyed to the ground through the belt conveyor 9 by the reversed loader 10, and when the coal stops flowing, the coal discharging tail beam 20 on the hydraulic support 12 swings after coal return, and the coal is loosened to flow.
The above embodiment is the preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above embodiment, and any other changes, modifications, replacements, combinations, simplifications, equivalent replacement modes, which are not departed from the spirit and principle of the present invention, should be included in the protection scope of the present invention.
Claims (2)
1. Super large inclination medium thickness coal seam caving coal mining system, its characterized in that includes: the mining equipment is arranged in the lower air inlet transportation roadway; the mining apparatus includes: the coal recovery device comprises a coal recovery front hydraulic support, a coal recovery rear hydraulic support and a reversed loader, wherein the end part of the reversed loader is arranged in the coal recovery front hydraulic support and the coal recovery rear hydraulic support, a swing oil cylinder and a coal discharge tail beam are arranged on the coal recovery rear hydraulic support, and the action end of the swing oil cylinder is connected with the coal discharge tail beam, so that the coal discharge tail beam is driven to swing on the coal recovery rear hydraulic support when the swing oil cylinder does telescopic motion; the coal caving tail beam is provided with a telescopic oil cylinder and a coal caving inserting plate, and the action end of the telescopic oil cylinder is connected with the coal caving inserting plate, so that the coal caving inserting plate is driven to move on the coal caving tail beam in a reciprocating manner when the telescopic oil cylinder acts; further comprising: the local main fan is arranged in the upper return air roadway.
2. The super dip angle medium thickness seam caving coal mining system as claimed in claim 1, wherein said mining apparatus further comprises: a transfer pulley, a track and a belt conveyor; the elevating conveyor is characterized in that one end of the reversed loader is arranged in the hydraulic support before coal returning and the hydraulic support after coal returning, the other end of the reversed loader is hinged to the reversed loader pulley, the reversed loader pulley is arranged on the track, and the belt conveyor is parallel to the track and laid in the lower air inlet transportation roadway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921732266.XU CN210829265U (en) | 2019-10-16 | 2019-10-16 | Top coal caving mining system for medium-thickness coal seam with extra-large dip angle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921732266.XU CN210829265U (en) | 2019-10-16 | 2019-10-16 | Top coal caving mining system for medium-thickness coal seam with extra-large dip angle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110578523A (en) * | 2019-10-16 | 2019-12-17 | 高九华 | Method and system for mining top coal of medium-thickness coal seam with extra-large dip angle |
| CN112983422A (en) * | 2021-03-17 | 2021-06-18 | 西安科技大学 | Ore drawing mining method for inclined layered solid deposit |
| CN113006798A (en) * | 2021-04-29 | 2021-06-22 | 西安科技大学 | Large-dip-angle thick coal seam combined type caving coal mining method |
-
2019
- 2019-10-16 CN CN201921732266.XU patent/CN210829265U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110578523A (en) * | 2019-10-16 | 2019-12-17 | 高九华 | Method and system for mining top coal of medium-thickness coal seam with extra-large dip angle |
| CN112983422A (en) * | 2021-03-17 | 2021-06-18 | 西安科技大学 | Ore drawing mining method for inclined layered solid deposit |
| CN113006798A (en) * | 2021-04-29 | 2021-06-22 | 西安科技大学 | Large-dip-angle thick coal seam combined type caving coal mining method |
| CN113006798B (en) * | 2021-04-29 | 2023-02-24 | 西安科技大学 | Large-dip-angle thick coal seam combined type caving coal mining method |
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| TR01 | Transfer of patent right |
Effective date of registration: 20220824 Address after: Room 423, Management Committee, Zhongshan Development Zone, Liupanshui City, Guizhou Province, 553000 Patentee after: Guizhou Tiandi Juneng Mining Engineering Technology Co.,Ltd. Address before: Room 504, gate 7, building 30, District 13, Heping Street, Chaoyang District, Beijing Patentee before: Gao Jiuhua |
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