Multi-step full-continuous coal mining system adopting buried inclined shaft arrangement for open pit coal mine
By adopting a multi-step fully continuous coal mining system arranged in buried inclined shafts in open-pit coal mines, the problems of belt transporters occupying space and frequent movement are solved, and the continuous transportation and efficient production of coal are achieved.
Patent Information
- Application Number
- CN202422513430.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-10-17
AI Technical Summary
In open-pit coal mines, belt transport aircraft layout occupies the inner drainage space, affects the inner drainage speed, and requires frequent transfer, resulting in low production efficiency.
A multi-step fully continuous coal mining system arranged in buried inclined shafts, including oblique tunnels, drainage steps and coal mining equipment. By laying the bottom plate and floor in the coal pit, and using a retractable belt transporter and lift belt transporter, the continuous lifting and transportation of coal is achieved without frequent transfer of equipment.
The continuous transportation of coal from the bottom of the pit to the surface is achieved, avoiding the impact of equipment transfer on the internal soil discharge, improving production efficiency and reducing transportation costs.
Smart Images
Figure CN223164521U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of open-pit coal mine mining, and in particular to a multi-bench fully continuous coal mining system with a buried inclined shaft layout in an open-pit coal mine. Background Art
[0002] Most domestic open-pit coal mines adopt the pit mining method and use fully continuous or semi-continuous mining technology. Belt conveyors need to be arranged at the end bench. On the one hand, the layout of belt conveyors will occupy a large amount of internal dumping space, affecting the speed of internal dumping following up. The belt conveyor route interferes with the internal dumping truck route, and the truck needs to increase the haulage distance, increasing the cost of dumping and transportation. On the other hand, as the mine pit advances, the conveyor needs to be relocated regularly, with great relocation difficulty and long relocation time. The above-mentioned many disadvantages seriously restrict the efficiency of fully continuous and semi-continuous production in open-pit coal mines. Utility Model Content
[0003] In order to solve the problems of difficult relocation and long relocation time of belt conveyors in open-pit coal mines, this application provides a multi-bench fully continuous coal mining system with a buried inclined shaft layout in an open-pit coal mine.
[0004] A multi-bench fully continuous coal mining system with a buried inclined shaft layout in an open-pit coal mine provided by this application adopts the following technical solutions:
[0005] A multi-bench fully continuous coal mining system with a buried inclined shaft layout in an open-pit coal mine includes a roadway inclined upward in the coal pit, a soil dumping layer bench opened on the side wall of the coal pit, and coal mining equipment arranged in the coal pit, which consists of an open-pit mining machine, a belt transfer vehicle, a transfer machine, a belt transfer bridge, a mobile hopper, a relocatable belt conveyor, a second belt conveyor, and a second lifting belt conveyor. The bottom of the coal pit is paved with a coal seam floor, the bottom of the roadway is paved with an end bench floor, and the end bench floor and the soil dumping layer bench are both paved with a floor. A first lifting belt conveyor is arranged in the roadway, and a telescopic belt conveyor is arranged on the top of the coal seam floor.
[0006] By adopting the above technical solutions, in the early stage of the layout of the fully continuous coal mining face, the floor of the roadway is first paved along the end bench floor or the internal soil dumping layer bench. When paving the floor on the soil dumping layer bench, it is necessary to level multiple benches first. The floor of the roadway is paved from the working face to the ground surface, and then the roadway is covered on it. Then, a first lifting belt conveyor is arranged in the roadway to lift and transport the coal mined from the fully continuous mining face to the ground surface. During the mining process of the mine pit, the roadway is gradually buried by internal dumping.
[0007] The open-pit mining machine includes a horizontal cutting drum for cutting coal and rock, a scraper plate for loading materials, and a scraper conveyor for transferring materials.
[0008] By adopting the above technical solution, the open-pit mining machine cuts coal and rock through a horizontal-axis cutting drum, shovels and loads materials with a scraper plate, and conveys the materials through a scraper conveyor in the middle of the equipment.
[0009] The belt transfer vehicle comprises a receiving hopper I, a receiving conveyor, a crawler traveling mechanism and a discharging arm I.
[0010] By adopting the above technical solution, the crawler traveling mechanism can realize the in-situ rotation and quick adjustment of the equipment; on the other hand, the discharging arm I can rotate left and right by °, pitch up and down, which is convenient for adjusting the receiving position. The crawler transfer vehicle receives materials from the open-pit mining machine and transfers the materials to the subsequent transfer machine with the discharging arm I.
[0011] The number of the transfer machines matches the number of benches, and the transfer machines are crawler type. The transfer machine is composed of a receiving arm, a discharging arm II and a slewing bearing, and the receiving arm and the discharging arm II are connected through the slewing bearing.
[0012] By adopting the above technical solution, the two large arms can form a straight line and rotate around the slewing bearing, and different numbers of transfer machines can be arranged according to different numbers of benches.
[0013] The transfer machine is equipped with a subsequent belt transfer bridge, and the belt transfer bridge comprises a track A, a track B and a truss. One end of the track A is connected with a receiving hopper II, and the track B is arranged above the movable belt conveyor.
[0014] By adopting the above technical solution, the track A overlaps the receiving hopper, receives materials from the transfer machine, and the track B straddles the movable belt conveyor and transfers materials to the movable belt conveyor.
[0015] The belt conveyor II and the movable belt conveyor are arranged perpendicular to each other.
[0016] By adopting the above technical solution, the telescopic belt conveyor is vertically overlapped and arranged with the movable belt conveyor, and the movable belt conveyor can be quickly and integrally moved horizontally by a bulldozer or a moving vehicle.
[0017] In summary, the present application includes at least one of the following beneficial technical effects:
[0018] 1. The present application realizes the multi-bench full-continuous coal mining process in an open-pit coal mine. The coal lifting route from the bottom working face to the surface does not interfere with the route of the waste-dumping truck. The roadway of the lifting belt conveyor does not need to be driven. During the process of internal waste-dumping and advancing, the lifting belt conveyor and the telescopic belt conveyor can work continuously without being moved, solving the problems that the layout of the lifting equipment leaves pits and affects the internal waste-dumping volume, and the long moving time of the lifting equipment affects the mining efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1Schematic diagram of the layout of the buried inclined shaft roadway in the embodiment of the present application;
[0020] Figure 2 Schematic diagram mainly showing the structure of the open-pit mining machine in the embodiment of the present application;
[0021] Figure 3 Schematic diagram mainly showing the structure of the crawler transfer vehicle in the embodiment of the present application;
[0022] Figure 4 Schematic diagram mainly showing the structure of the transfer machine in the embodiment of the present application;
[0023] Figure 5 Schematic diagram mainly showing the structure of the belt transfer bridge in the embodiment of the present application;
[0024] Figure 6 Schematic diagram mainly showing the layout structure of the mining equipment on the first bench in the embodiment of the present application;
[0025] Figure 7 Schematic diagram mainly showing the layout structure of the mining equipment on the second bench in the embodiment of the present application;
[0026] Figure 8 Schematic diagram mainly showing the layout structure of the mining equipment on the third bench in the embodiment of the present application;
[0027] Figure 9 Schematic diagram mainly showing the layout structure of the mining equipment on the fourth bench in the embodiment of the present application;
[0028] Figure 10 Top view of the layout of the mining equipment on the first bench in the embodiment of the present application;
[0029] Reference numerals: 1, end slope floor; 2, overburden layer bench; 3, roadway; 4, first lifting belt conveyor; 5, coal seam floor; 6, telescopic belt conveyor; 7, open-pit mining machine; 701, horizontal axis cutting drum; 702, scraper plate; 703, scraper conveyor; 8, crawler transfer vehicle; 801, first receiving hopper; 802, receiving conveyor; 803, crawler travel mechanism; 804, first discharging arm; 9, transfer machine; 901, receiving arm; 902, second discharging arm; 903, slewing bearing; 10, belt transfer bridge; 101, truss; 102, A crawler; 103, second receiving hopper; 104, B crawler; 11, mobile blanking hopper; 12, relocatable belt conveyor; 13, telescopic belt conveyor; 14, second lifting belt conveyor. Detailed description of the specific implementation
[0030] The following will further elaborate on the present application with reference to the attached Figures 1 - 10 for a more detailed description of the present application.
[0031] An embodiment of the present application discloses a multi-step fully continuous coal mining system with a buried inclined shaft layout in an open-pit coal mine.
[0032] Refer to Figure 1 , the buried inclined shaft layout
[0033] In the early stage of the layout of the fully continuous coal mining face, first lay the floor of the roadway along the end-wall floor 1 or the inner row soil layer step 2. To lay the floor on the soil layer step 2, it is necessary to level the multi-layer steps first. The floor of the roadway 3 is laid from the working face to the ground surface, and then cover the roadway on it. Then, a hoisting belt conveyor 4 is arranged in the roadway to hoist and transport the coal mined from the fully continuous mining face to the ground surface. During the mining process of the mine pit, the roadway 3 is gradually buried by the inner-dumped soil. On the coal seam floor 5 of the coal mining face, a telescopic belt conveyor 6 is arranged along the advancing direction of the working face. A hard floor is laid under the telescopic belt conveyor 6, and the roadway 3 is covered on it. When the working face advances forward, the telescopic belt conveyor 6 is continuously extended, and the covering roadway 3 is also continuously laid forward and is continuously buried as the inner-dumped soil advances. In this way, during the process of the working face continuously advancing and changing positions, it is not necessary to move the hoisting belt conveyor 4 and the telescopic belt conveyor 6, realizing continuous coal transportation to the ground surface and not affecting the vehicle transportation line above the inner-dumped soil.
[0034] Refer to Figures 2 - 4 , the multi-step fully continuous mining process
[0035] The equipment applied in the multi-step fully continuous coal mining method mainly consists of an open-pit mining machine 7, a belt transfer vehicle 8, a transfer machine 9 (multiple units), a belt transfer bridge 10, a mobile hopper 11, a relocatable belt conveyor 12, a telescopic belt conveyor 13, and a hoisting belt conveyor 14. The corresponding number of transfer machines is configured according to the number of coal mining steps.
[0036] Refer to Figure 2 , the open-pit mining machine 7 cuts coal and rock through the horizontal-axis cutting drum 701, loads materials with the scraper plate 702, and transfers materials through the scraper conveyor 703 in the middle of the equipment.
[0037] Refer to Figure 3 , the belt transfer vehicle 8 is composed of a receiving hopper 801, a receiving conveyor 802, a crawler traveling mechanism 803, and a discharging arm 804. On the one hand, its crawler traveling mechanism 803 can realize the in-situ rotation of the equipment for quick adjustment; on the other hand, the discharging arm 804 can rotate 75° left and right and pitch up and down to facilitate the adjustment of the receiving position. The belt transfer vehicle 8 receives materials from the open-pit mining machine 7 and transfers the materials to the subsequent transfer machine 9 with the discharging arm 804.
[0038] Refer to Figure 4, the transfer machine 9 is crawler-type, having a receiving arm 901 and a discharging arm 902. The two large arms are arranged in a straight line and can rotate around the slewing bearing 903. Different numbers of transfer machines 9 can be arranged according to the number of benches.
[0039] Refer to Figures 4 - 5 , the transfer machine 9 is equipped with a belt transfer bridge 10 at the rear. The belt transfer bridge 10 consists of two sets of crawlers A and B and a truss 101. The crawler A 102 is lapped with the receiving hopper 103 to receive materials from the transfer machine 9, and the crawler B 104 straddles the movable belt conveyor 12 to transfer materials to the movable belt conveyor 12.
[0040] Refer to Figures 6 - 8 , the movable belt conveyor 12 is arranged vertically and lapped with the telescopic belt conveyor 13. The movable belt conveyor 12 can be quickly and integrally moved horizontally by a bulldozer or a relocation vehicle.
[0041] In the pit mining method, multiple coal mining benches will be formed in the coal mining face. The multi-bench full-continuous coal mining method adopts the method of mining step by step from top to bottom.
[0042] Refer to Figures 8 - 10 , the equipment matching sequence is the open-pit mining machine 7, the belt transfer vehicle 8, the transfer machine 9, the belt transfer bridge 10, the movable dropping hopper 11, the movable belt conveyor 12, the telescopic belt conveyor 13, and the lifting belt conveyor 14. There will be different equipment lapping methods for each bench mining, mainly depending on the lapping distance from the open-pit mining machine 7 to the movable belt conveyor 12. When the distance is shortened, the intermediate transfer equipment will be gradually reduced.
[0043] The implementation principle of a multi-bench full-continuous coal mining system with a buried inclined shaft layout in an open-pit coal mine according to an embodiment of the present application is as follows: During operation, the open-pit mining machine 7 and the movable belt conveyor 12 are arranged in parallel, moving forward and realizing cutting coal and rock, loading materials, and transferring materials.
[0044] The belt transfer vehicle 8, the transfer machine 9, and the belt transfer bridge 10 are responsible for receiving coal from the previous equipment and transferring it to the next-level equipment. Finally, the belt transfer bridge 10 transfers it to the movable belt conveyor 12 through the movable dropping hopper 11. The materials then pass through the movable belt conveyor 12. For each additional bench in the coal mining face, an additional transfer machine 9 needs to be arranged on this bench to receive materials from the transfer machine 9 on the previous bench and transfer the materials to the transportation equipment on the next bench, finally realizing the full-continuous coal mining operation.
[0045] During the mining process, taking four benches as an example, from top to bottom are Bench One, Two, Three, and Four. First, arrange the surface miner 7, the belt transfer vehicle 8, and a transfer machine 9 on the second bench. Arrange a transfer machine 9 on the third bench. A belt transfer bridge 10 is provided behind the transfer machine 9. The belt transfer bridge 10 has an A crawler 102 arranged on Bench Four and a B crawler 104 arranged on the coal seam floor. The B crawler 104 straddles the movable belt conveyor 12 and transfers materials to the movable hopper 11 on the movable belt conveyor 12.
[0046] The materials enter the main mine transportation system through the movable belt conveyor 12, the telescopic belt conveyor 13, and the second lifting belt conveyor 14, and finally achieve fully continuous transportation.
[0047] After mining a bench flat width distance on the first bench, the flat width of the second bench becomes twice the original. Stop the transfer machine 9 on the second bench to rest. Move the surface miner 7 and the belt transfer vehicle 8 from the second bench to the third bench, and cooperate with the transfer machine 9 on the third bench to form a new continuous system, and then mine another bench flat width on the second bench.
[0048] After mining a bench flat width distance on the second bench, the second bench resumes to a single bench flat width, and the flat width of the third bench becomes twice the original. After the mining is completed, stop the transfer machine 9 on the third bench to rest. Move the surface miner 7 and the belt transfer vehicle 8 from the third bench to the fourth bench, and cooperate with the belt transfer bridge 10 on the fourth bench by the A crawler 102 to form a new continuous system.
[0049] After mining a bench flat width distance on the third bench, the third bench resumes to a single bench flat width, and the flat width of the fourth bench becomes twice the original. After the mining is completed, move the surface miner 7, the belt transfer vehicle 8, and the belt transfer bridge 10 with the A crawler 102 from the fourth bench to the floor, forming a combination of the surface miner 7, the belt transfer vehicle 8, and the belt transfer bridge 10, and conduct mining for a bench flat width on the fourth bench, finally achieving sequential mining of the four benches.
[0050] When sequential mining of a bench flat width is achieved for all four benches, the telescopic belt conveyor 13 extends a bench flat width distance in the advancing direction of the working face, and the movable belt conveyor 12 transversely advances a bench flat width distance in the advancing direction of the working face.
[0051] When the coal and rock of a set of steps are horizontally mined for one stroke in sequence on the fourth step, the belt conveyor 12 is displaced horizontally by the distance of a bench and restored to the starting position to start the operation of the next cycle. After the belt conveyor 12 is displaced, a roadway with the length of a bench is covered on the telescopic belt conveyor 13. As the inner dumping progresses, the roadway is continuously covered. In this way, while the lifting belt conveyor 14 is not relocated, the fully continuous mining operation is maintained, and the transportation cost of the coal mining operation is reduced.
[0052] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.
Claims
1. A multi-bench fully continuous coal mining system with a buried inclined shaft layout for open-pit coal mines, comprising a roadway (3) inclined upwards in the coal pit, a soil-removing bench (2) opened on the side wall of the coal pit, and coal mining equipment arranged in the coal pit, which consists of an open-pit mining machine (7), a belt transfer vehicle (8), a transfer machine (9), a belt transfer bridge (10), a mobile hopper (11), a relocatable belt conveyor (12), a second belt conveyor (13), and a second lifting belt conveyor (14), characterized in that: The bottom of the coal pit is paved with a coal seam floor (5), the bottom of the roadway (3) is paved with an end wall floor (1), and floors are paved on both the end wall floor (1) and the soil discharge layer step (2). A first lifting belt conveyor (4) is arranged in the roadway (3), and a telescopic belt conveyor (6) is arranged on the top of the coal seam floor (5).
2. The multi-step fully continuous coal mining system with a buried inclined shaft layout for an open-pit coal mine according to claim 1, wherein: The open-pit mining machine (7) comprises a horizontal cutting drum (701) for cutting coal and rock, a scraper plate (702) for loading materials, and a scraper conveyor (703) for transferring materials.
3. A multi-bench fully continuous coal mining system with a buried inclined shaft layout for open-pit coal mines, characterized in that: The belt transfer vehicle (8) comprises a first receiving hopper (801), a receiving conveyor (802), a crawler traveling mechanism (803), and a first discharging arm (804).
4. A multi-step fully continuous coal mining system with a buried inclined shaft layout for open-pit coal mines, characterized in that: The number of the transfer machines (9) matches the number of steps, and the transfer machines (9) are crawler-type. The transfer machine (9) comprises a receiving arm (901), a second discharging arm (902), and a slewing bearing (903), and the receiving arm (901) is connected to the second discharging arm (902) through the slewing bearing (903).
5. A multi-step fully continuous coal mining system with a buried inclined shaft layout for open-pit coal mines, characterized in that: The transfer machine (9) is rear-matched with a belt transfer bridge (10). The belt transfer bridge (10) comprises an A crawler (102), a B crawler (104), and a truss (101). One end of the A crawler (102) is connected with a second receiving hopper (103), and the B crawler (104) is arranged above the movable belt conveyor (12).
6. A multi-bench fully continuous coal mining system with a buried inclined shaft layout for open-pit coal mines, characterized in that: The second belt conveyor (13) and the movable belt conveyor (12) are arranged perpendicular to each other.