A method for filling waste with gangue based on underground TDS system

Abstract

The present invention relates to the field of filling technology, and more particularly to a gangue solid waste filling method based on an underground TDS system. An underground gangue filling system is constructed by utilizing an idle tunnel near an underground concentrated gangue bin. Gangue enters a jaw crusher from the front end of the underground gangue filling system through a mine car for crushing. Gangue screened out by a TDS intelligent gangue selection system in the underground concentrated gangue bin is also conveyed to a double-stage crusher through a feeder. After the double-stage crushing is completed, it is conveyed to a vibrating grading screen through an anti-skid belt conveyor for gangue particle size screening. Unqualified gangue is returned to the double-stage crusher through an anti-skid belt conveyor for re-crushing. Qualified gangue enters a finished product horizontal buffer bin after screening, is weighed and lowered to a mixer, and is stirred by water injection. After being stirred evenly, it becomes a filling slurry. The present invention occupies a small space, saves engineering quantity, and has high efficiency. It has practical guiding significance for realizing the non-lifting of gangue, resource utilization of underground solid waste, and green mining of coal mines.

Description

Technical Field

[0001] The invention relates to the technical field of filling, and in particular to a gangue solid waste filling method based on an underground TDS system. Background Art

[0002] Under the background of the international strategy of "double carbon", the resource utilization of solid waste has become one of the important ways to achieve it. In the field of coal mining, coal gangue is the main waste generated in the process of coal resource development. It mainly comes from the excavation gangue generated during the excavation of underground rock tunnels, the interlayer gangue mixed in the coal seam during coal cutting, and the gangue washed in the production process of ground coal washing plants. With my country's full understanding of solid waste such as coal gangue and the improvement of environmental awareness, underground TDS intelligent gangue discharge technology has gradually become a popular application technology to solve the accumulation of ground gangue mountains and achieve the goal of not lifting coal gangue to the mine.

[0003] However, the non-discharge of a large amount of underground gangue will inevitably affect the normal production of the mine. Therefore, this application studies how to use the underground TDS intelligent gangue discharge system to consume underground gangue and other solid wastes on site, which is beneficial to ensure the normal production of the mine, and also conducive to the realization of solid waste resource filling and utilization, protecting the ecological environment, and promoting the long-term and healthy development of the mine. Summary of the invention

[0004] In order to make up for the deficiencies in the prior art, the present invention provides a gangue solid waste filling method based on an underground TDS system, aiming to make full use of the underground TDS intelligent gangue discharge system through reasonable layout to fill underground gangue and other solid waste into the goaf of the working face, so as to deal with the long-term accumulation of underground coal gangue in time.

[0005] The present invention is achieved through the following technical solutions:

[0006] A method for filling solid waste with gangue based on an underground TDS system:

[0007] S1: According to the layout level of the underground TDS system, an appropriate location is selected to arrange the underground centralized gangue bin, which is mainly used to store the gangue screened by the TDS intelligent gangue selection system. A primary jaw crusher is set at the belt drive position before entering the bin for crushing, and the gangue particle size is reduced in advance to facilitate the storage of more volume gangue. After crushing, the gangue enters the centralized gangue bin via an anti-skid belt conveyor.

[0008] S2: An underground gangue filling system is constructed near the underground centralized gangue bin using idle tunnels or newly excavated tunnels. Gangue excavated from the underground tunnel enters from the front end of the underground gangue filling system, and is transported by bottom-unloading mine cars and then lowered to the storage bin for coal gangue buffering. The underground gangue filling system includes a primary crushing system, a secondary crushing and screening system, a slurry preparation system, and a slurry pumping system.

[0009] S3: The gangue from underground tunnel excavation is conveyed to the first-stage jaw crusher for crushing through a scraper conveyor. After crushing, it enters the double-stage crusher through an anti-skid belt conveyor. At the same time, the gangue screened out by the TDS intelligent gangue selection system in the underground concentrated gangue bin is also conveyed to the double-stage crusher through a feeder. The rear side of the double-stage crusher is connected to a vibrating grading screen. After the double-stage crushing is completed, it is conveyed to the vibrating grading screen through an anti-skid belt conveyor for gangue particle size screening. The unqualified coal gangue is returned to the double-stage crusher for re-crushing through the anti-skid belt conveyor, and the qualified coal gangue is screened and enters the finished product horizontal buffer bin.

[0010] S4: The finished product in the horizontal buffer bin is transported to the weighing bucket through the anti-slip belt conveyor, and then placed into the mixer after weighing. At the same time, an appropriate proportion of water is injected for stirring. After being stirred evenly, it becomes filling slurry.

[0011] S5: Use an industrial filling pump to deliver the prepared filling slurry to the solid waste filling and utilization working face through a slurry pipeline. The specific method is to arrange a filling pipeline at a certain interval behind the working face support. The end of the pipeline is a grouting flower pipe. Each filling pipeline is flexibly connected to the coal mining support to facilitate the movement of the filling pipeline for filling as the support moves forward.

[0012] Furthermore, in order to better realize the present invention, the capacity of the underground centralized gangue bin at least meets the discharge volume of the TDS intelligent gangue selection system for 2 days, and the lower opening of the gangue bin is connected to the tunnel or chamber where the underground gangue filling system is located.

[0013] Furthermore, in order to better implement the present invention, the storage bin is located below the track of the bottom-dumping mine car for loading the gangue for excavation in the underground tunnel.

[0014] Furthermore, in order to better realize the present invention, the double-stage crusher and the vibrating grading screen simultaneously crush and screen the gangue screened out by the TDS intelligent gangue selection system and the gangue after the first-stage crushing of the underground tunnel excavation gangue. The secondary crushing and screening system requires that the gangue particle size must be ≤15mm before it can enter the finished product horizontal buffer bin.

[0015] Furthermore, in order to better realize the present invention, the underground filling system also includes a water supply system and a power supply and distribution system.

[0016] The beneficial effects of the present invention are:

[0017] The present invention provides a gangue solid waste filling method based on an underground TDS system, which can fully process the gangue discharged by the TDS intelligent gangue selection system in the underground gangue selection and the gangue excavated in the underground tunnel, and use the idle underground tunnels or newly excavated tunnels to build an underground gangue filling system, which occupies a small space, saves engineering workload, and has high efficiency. It can not only solve the problem of resource utilization of underground coal gangue solid waste, but also add a cement slurry preparation system in the later stage, and mix it with the finished gangue after underground crushing to form a paste for filling, replacing the coal pillars left under the building (structure). In summary, the present invention has practical guiding significance for realizing the non-lifting of coal gangue, resource utilization of underground solid waste and green mining of coal mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a flow chart of gangue solid waste filling based on the underground TDS system;

[0019] Figure 2 This is a layout diagram of the gangue solid waste filling system based on the underground TDS system of the present invention.

[0020] In the figure,

[0021] 1. Underground centralized gangue bin; 2. First-stage jaw crusher; 3. Bottom-discharge mine car; 4. Storage bin; 5. Scraper conveyor; 6. Anti-skid belt conveyor; 7. Feeder; 8. Double-stage crusher; 9. Vibrating grading screen; 10. Finished product horizontal buffer bin; 11. Weighing bucket; 12. Mixer; 13. Industrial filling pump; 14. Slurry pipeline. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0024] Figure 1-Figure 2 This is a specific embodiment of the present invention, which is a gangue solid waste filling method based on an underground TDS system.

[0025] S1: According to the layout level of the underground TDS system, an appropriate location is selected to arrange the underground centralized gangue bin 1, which is mainly used to store the gangue screened by the TDS intelligent gangue selection system. A primary jaw crusher 2 is set at the belt drive position before entering the bin for crushing, and the gangue particle size is reduced in advance to facilitate the storage of more volume gangue. After crushing, the gangue enters the centralized gangue bin via an anti-skid belt conveyor.

[0026] S2: An underground gangue filling system is constructed near the underground concentrated gangue bin using idle tunnels or newly excavated tunnels. Gangue excavated in the underground tunnel enters from the front end of the underground gangue filling system, and is transported by the bottom-unloading mine car 3 and then lowered to the storage bin 4 for buffering the coal gangue. The underground gangue filling system includes a primary crushing system, a secondary crushing and screening system, a slurry preparation system, and a slurry pumping system.

[0027] S3: The gangue from underground tunnel excavation is conveyed to the primary jaw crusher 2 for crushing by the scraper conveyor 5, and enters the double-stage crusher 8 through the anti-skid belt conveyor 6 after crushing. At the same time, the gangue screened out by the TDS intelligent gangue selection system in the underground concentrated gangue bin 1 is also conveyed to the double-stage crusher 8 through the feeder 7. The rear side of the double-stage crusher 8 is connected to the vibrating grading screen 9. After the double-stage crushing is completed, it is conveyed to the vibrating grading screen 9 through the anti-skid belt conveyor 6 for gangue particle size screening. The unqualified gangue is returned to the double-stage crusher 8 through the anti-skid belt conveyor 6 for re-crushing, and the qualified gangue is screened and enters the finished product horizontal buffer bin 10.

[0028] S4: The finished product in the horizontal buffer bin 10 is conveyed to the weighing bucket 11 through the anti-slip belt conveyor 6, and then placed in the mixer 12 after being weighed, and a proper proportion of water is injected for stirring, and the mixture is evenly stirred to form a filling slurry.

[0029] S5: The prepared filling slurry is delivered to the solid waste filling and utilization working face by means of an industrial filling pump 13 through a slurry delivery pipeline 14. The specific method is to arrange a filling pipeline at a certain interval behind the working face support, and the end of the pipeline is a grouting flower pipe. Each filling pipeline is flexibly connected to the coal mining support to facilitate the movement of the filling pipeline for filling as the support moves forward.

[0030] Among them, the capacity of the underground centralized gangue bin 1 is at least enough to meet the discharge of the TDS intelligent gangue selection system for 2 days, and the lower opening of the gangue bin is connected to the tunnel or chamber where the underground gangue filling system is located. The storage bin 4 is located under the track of the bottom-unloading mine car 3 loaded with gangue for underground tunnel excavation. The double-stage crusher 8 and the vibrating grading screen 9 simultaneously crush and screen the gangue selected by the TDS intelligent gangue selection system and the gangue after the first crushing of the underground tunnel excavation gangue. The secondary crushing and screening system requires that the gangue particle size must be ≤15mm before it can enter the finished product horizontal buffer bin 10. The underground filling system also includes a water supply system and a power supply and distribution system.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A method for filling solid waste with gangue based on an underground TDS system, characterized in that: The following steps are involved: S1: According to the layout level of the underground TDS system, an underground centralized gangue bin (1) is arranged at an appropriate location to store the gangue screened by the TDS intelligent gangue selection system. A primary jaw crusher (2) is arranged at the belt drive position before entering the bin for crushing, so as to reduce the particle size of the gangue in advance and facilitate the storage of more volume of gangue. After crushing, the gangue enters the underground centralized gangue bin (1) via an anti-slip belt conveyor (6); S2: constructing an underground gangue filling system near an underground concentrated gangue bin (1) by using an idle tunnel or a newly excavated tunnel, wherein the gangue excavated in the underground tunnel enters from the front end of the underground gangue filling system, is transported by a bottom-unloading mine car (3), and is then lowered to a storage bin (4) to cache the gangue, wherein the underground gangue filling system includes a primary crushing system, a secondary crushing and screening system, a slurry preparation system, and a slurry pumping system; S3: The gangue from the underground tunnel excavation is transported to the primary jaw crusher (2) through a scraper conveyor (5) for crushing. After crushing, it enters the double-stage crusher (8) through an anti-skid belt conveyor (6). At the same time, the gangue screened by the TDS intelligent gangue selection system in the underground concentrated gangue bin (1) is also transported to the double-stage crusher (8) through a feeder (7). The rear side of the double-stage crusher (8) is connected to a vibrating grading screen (9). After the double-stage crushing is completed, it is transported to the vibrating grading screen (9) through an anti-skid belt conveyor (6). The screen (9) screens the gangue particle size, and unqualified gangue is returned to the double-stage crusher (8) via the anti-slip belt conveyor (6) for re-crushing, and qualified gangue is screened and enters the finished product horizontal buffer bin (10); the double-stage crusher (8) and the vibrating grading screen (9) simultaneously crush and screen the gangue screened by the TDS intelligent gangue selection system and the gangue of the underground tunnel excavation after the first crushing, and the second-stage crushing and screening system requires that the gangue particle size must be ≤15mm before it can enter the finished product horizontal buffer bin; S4: The finished product in the horizontal buffer bin (10) is conveyed to the weighing bucket (11) via the anti-slip belt conveyor (6), and after being weighed, it is lowered into the mixer (12), and water is injected for stirring, and after being stirred evenly, it becomes a filling slurry; S5: The prepared filling slurry is delivered to the solid waste filling and utilization working face by using an industrial filling pump (13) through a slurry delivery pipeline (14). Specifically, a filling pipeline is arranged at a certain interval behind the working face support, and the end of the pipeline is a grouting flower pipe. Each filling pipeline is flexibly connected to the coal mining support so that the filling pipeline can be driven to move and fill as the support moves forward; The capacity of the underground concentrated gangue bin (1) is at least sufficient to meet the discharge volume of the TDS intelligent gangue selection system for 2 days, and the lower opening of the underground concentrated gangue bin (1) is connected to the tunnel or chamber where the underground gangue filling system is located; The storage bin (4) is located below the track of a bottom-dumping mining car (3) for loading gangue for tunneling in the underground mine; The underground filling system also includes a water supply system and a power supply and distribution system.

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