top slicing with horizontal slicing and back filling

Abstract

The application provides a top horizontal slicing filling mining method suitable for thin to extremely thin multiple veins, and belongs to the technical field of mining. The mining method comprises the following steps: dividing a mineral body into corresponding middle sections, subsections and layers, and driving a stope communication way from a subsection roadway to a layer, so that the stope communication way into the layer penetrates each vein between an upper disc and a lower disc; driving a footway in each vein on both sides of the stope communication way along the strike of the mineral body, forming a footway, reserving a pillar on both sides of the stope communication way, expanding the side of the pillar from the outside of the pillar and back filling a room; after the back filling and filling of the room are completed, the stope communication way and the pillars on both sides thereof are back filled; and then the back filling and filling of each layer are sequentially performed in a top-down order. Through the above method, the method provided by the application can ensure the safe back filling of thin to extremely thin multiple veins, realize continuous operation of mining and filling, reduce the loss of dilution, and improve the economic benefit of the mine.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mining, in particular to an upward horizontal slicing and filling mining method suitable for thin to extremely thin multiple veins. BACKGROUND

[0002] For different ore body occurrence conditions, scholars have researched different mining methods, which has greatly benefited underground mining. However, there are still some difficult-to-mine ore bodies, which makes it difficult for traditional mining methods to obtain good stoping effect.

[0003] For example, when multiple veins with different thicknesses, large changes in dip angle and local fragmentation appear in the direction of the ore body, most mines still use traditional short-hole shrinkage method, short-hole shrinkage and subsequent filling method and electric rake out ore upward slicing mining method for mining. Although these stoping methods do not require vein outside mining preparation engineering, they will cause a large number of raise shafts, and personnel, materials and equipment need to be operated by using the raise shafts, which has high safety risk. When mining by using the short-hole shrinkage method, whether subsequent filling is used or not, the loss of the remaining pillar will be faced, which is a great waste of mine resources. When the thickness of the ore body is thin, the use of electric rake out ore not only has low efficiency, but also easily causes the mixing of filling body to cause ore dilution; at the same time, the mechanization degree of this mining method is low, and in the environment of promoting mining technology to mechanization and intelligence, this mining method may face the risk of elimination. In addition, for the ore body with multiple veins in the strike direction and thin to extremely thin vein thickness, the existing mining method is easy to increase the exposed area of the top space, which leads to the easy collapse of the roof and affects the stability of the stope.

[0004] Therefore, it is necessary to design a safe and efficient mining method with less dilution loss and continuous stoping and filling for such difficult-to-mine thin to extremely thin multiple veins to solve the above problems. SUMMARY

[0005] In view of the technical problems in the background art, the purpose of the present application is to provide an upward horizontal slicing and filling mining method suitable for thin to extremely thin multiple veins, which can ensure the safe stoping of thin to extremely thin multiple veins, realize continuous mining and filling operation, reduce dilution loss and improve the economic benefit of the mine.

[0006] The present application provides an upward horizontal slicing and filling mining method suitable for thin to extremely thin multiple veins, which comprises the following steps:

[0007] S1. According to the vertical height of the ore body, a middle section is divided, a plurality of subsections are divided in each middle section, and a plurality of slices are divided in each subsection; a subsection roadway and a vein outside chute are arranged outside the vein, and the subsection roadway is communicated with the vein outside chute through a chute connecting channel;

[0008] S2. A mining field connecting passage is formed by the segmented drifts, and the mining field connecting passage enters into a layer, is excavated from a lower panel to an upper panel, and penetrates through each vein between the upper panel and the lower panel; and a filling air return shaft is arranged at an end of the mining field connecting passage;

[0009] S3. A floor is excavated in each vein along a strike of the ore body on both sides of the mining field connecting passage, a pillar is reserved on both sides of the mining field connecting passage after a floor roadway is formed, and a stope is expanded and roofed from the outside of the pillar; after the stope is completed, the mined-out area of the stope is filled through the filling air return shaft to form a stope filling surface; after the stope is filled and reaches an initial setting state, the mining field connecting passage and the pillars on both sides thereof are mined, the mined-out area of the mining field connecting passage and the pillars is filled after the mining is completed, and the mining and filling of the layer are completed after the strength of the filling body reaches a standard;

[0010] S4. Each layer is sequentially mined and filled in a sequence from bottom to top.

[0011] In the technical scheme of the embodiment, the mining field connecting passage penetrates through each vein, and synchronous mining and filling of multiple veins can be realized. When each vein in each layer is mined, a pillar is reserved on both sides of the mining field connecting passage, so that the stope on both sides of the mining field connecting passage is not connected to form a large stope, the exposed area is effectively reduced, and the stability of the stope is improved. On this basis, the stope is mined and filled first, and then the pillar and the mining field connecting passage are mined, so that the pillar can be safely mined while the stability of the stope is ensured, the resource recovery rate is high, and the dilution loss is small.

[0012] In some embodiments, in step S3, the pillar is mined to the same height as the stope filling surface, and the mining field connecting passage is roofed to a position higher than the stope filling surface when the mining field connecting passage and the pillars on both sides thereof are mined; and the filling height is consistent with the stope filling surface when the mined-out area of the mining field connecting passage and the pillars is filled.

[0013] In this embodiment, by controlling the mining and filling height of the pillar and the mining field connecting passage, the part of the mining field connecting passage higher than the stope filling surface can be used as a vehicle and pedestrian passage, and the pillar on both sides of the mining field connecting passage can also be used for the next mining, so that continuous operation of the mining, filling and layer conversion process is realized while the safe and efficient mining is ensured.

[0014] In some embodiments, the mining field connecting passage is roofed to a position 2.5-3.5 m higher than the stope filling surface when the mining field connecting passage and the pillars on both sides thereof are mined.

[0015] In some embodiments, in step S1, the height of the middle section is 40-50 m, 3-4 subsections are divided in each middle section, and 3-4 layers are divided in each subsection.

[0016] In some embodiments, in step S2, the drifts are arranged along the ore body strike at intervals, and the interval between adjacent drifts is 40-60 m.

[0017] In some embodiments, in step S3, the length of the draw is 20-30 m, and the width of the pillar reserved on both sides of the drift is 2.5-3.5 m.

[0018] In some embodiments, in step S3, when the stoping chamber is stoped, the stoping height is 4-4.5 m; when the stoping chamber is filled, the filling height is 2.5-3.5 m.

[0019] In some embodiments, in step S3, the ore obtained by stoping is transported to the vein outside the chute for ore drawing.

[0020] In some embodiments, when the thickness of the ore vein is ≤2 m, the ore is first raked to the drift by an electric rake during ore drawing, and then transported to the vein outside the chute by a reamer and a mine car arranged in the drift.

[0021] In some embodiments, when the thickness of the ore vein is >2 m, the ore is transported to the vein outside the chute by a shovel during ore drawing.

[0022] The beneficial effects of the present application are:

[0023] The upward horizontal layer filling mining method provided by the present application is suitable for thin to extremely thin multiple ore veins, and can realize safe and efficient continuous operation of synchronous stoping, synchronous filling and synchronous layer transfer of multiple ore veins by penetrating the drifts through the multiple ore veins and stoping each ore vein along the ore body strike from both sides of the drift. Meanwhile, when stoping each ore vein, the present application reserves a pillar on both sides of the drift, stopes and fills the stoping chamber first, and then stopes and fills the pillar and the drift, so that the structure parameters of the stope are relatively small, the safe stoping of the pillar is realized under the premise of ensuring the stability of the stope, the resource recovery rate is high, the dilution loss is small, and the economic benefit of the mine is effectively improved. Compared with the traditional mining method, the method provided by the present application not only avoids the large ore dilution loss caused by a large number of shafts arranged in the mining process, but also avoids the large mining and cutting ratio caused by the conflict of different mining methods in the same ore block. The present application has wide applicability for small and medium-sized mines with multiple ore veins, poor stability of the ore veins and thin to extremely thin thickness of the ore veins. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the present application, the drawings used in the present application will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0025] Figure 1 The main view schematic diagram of the stope structure in the mining process of the upward horizontal slicing and filling mining method suitable for thin to extremely thin multiple veins provided by the embodiment of the present application, namely, the I-I direction schematic diagram;

[0026] Figure 2 The side view schematic diagram of the stope structure in the mining process of the upward horizontal slicing and filling mining method suitable for thin to extremely thin multiple veins provided by the embodiment of the present application, namely, the II-II direction schematic diagram;

[0027] Figure 3 The top view schematic diagram of the stope structure in the mining process of the upward horizontal slicing and filling mining method suitable for thin to extremely thin multiple veins provided by the embodiment of the present application, namely, the III-III direction schematic diagram;

[0028] Figure 4 The stoping scheme schematic diagram of the room and pillar and the stope connecting tunnel in the upward horizontal slicing and filling mining method suitable for thin to extremely thin multiple veins provided by the embodiment of the present application.

[0029] Explanation of reference signs: 1, ore body; 2, sectional roadway; 3, vein outside chute shaft; 4, chute connecting tunnel; 5, middle section transportation roadway; 6, stope connecting tunnel; 7, filling return air shaft; 8, pillar; 9, stoping blast hole; 10, blasting heap; 11, high-strength filling body; 12, low-strength filling body. DETAILED DESCRIPTION

[0030] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, but cannot limit the protection scope of the present application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0032] Reference to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all referring to a common or identical embodiment. One of ordinary skill in the art will readily recognize from the disclosure herein the possibility of combining features of different embodiments.

[0033] Since the conventional shallow hole shrinkage method, shallow hole shrinkage and subsequent filling method and electric rake ore drawing upward slicing mining method and other stoping methods are not suitable for the stoping of thin to extremely thin multiple veins, the application improves the traditional upward horizontal slicing filling mining method, so that it can ensure the safe stoping of thin to extremely thin multiple veins, realize the continuous operation of mining and filling, reduce the loss of dilution, and improve the economic benefit of the mine.

[0034] In particular, please refer to Figures 1-4 The embodiment of the application provides an upward horizontal slicing filling mining method suitable for thin to extremely thin multiple veins, which comprises the following steps:

[0035] S1. According to the vertical height of the ore body 1, a middle section is divided, a plurality of subsections are divided in each middle section, and a plurality of slices are divided in each subsection; a subsection roadway 2 is arranged outside the vein, and a vein outside the vein 3 is arranged; the subsection roadway 2 is communicated with the vein outside the vein 3 through a chute connecting channel 4;

[0036] S2. A stope connecting channel 6 is excavated from the subsection roadway 2 to the slice; after entering the slice, the stope connecting channel 6 is excavated from the lower disc to the upper disc, and passes through each vein between the upper disc and the lower disc; and a filling air return well 7 is arranged at the end of the stope connecting channel 6;

[0037] S3. The bottom of each vein is excavated along the trend of the ore body 1 on both sides of the stope connecting channel 6 to form a bottomed roadway, and a pillar 8 is reserved on both sides of the stope connecting channel 6, and then the help of the pillar 8 is expanded from the outside to backfill the ore room; after the ore room stoping is completed, the goaf of the ore room is filled through the filling air return well 7 to form a stope filling surface; after the ore room filling is completed and reaches the initial setting state, the stope connecting channel 6 and the pillar 8 on both sides thereof are backfilled, and after the strength of the filling body reaches the standard, the stoping and filling of the slice are completed;

[0038] S4. Each slice is sequentially stoped and filled in order from bottom to top.

[0039] In the technical scheme of the embodiment of the application, the stope communication passage 6 penetrates through each lode, and synchronous stoping and filling turning of multiple lodes can be realized. When each lode in each sublevel is stoped, the ore pillars 8 are reserved on both sides of the stope communication passage 6, so that the ore rooms on both sides of the stope communication passage 6 are not connected to form a large ore room, the exposed area is effectively reduced, and the stability of the stope is improved. On this basis, the ore room is stoped and filled first, and then the ore pillars 8 and the stope communication passage 6 are stoped, so that the ore pillars 8 can be safely stoped while ensuring the stability of the stope, the resource recovery rate is high, and the dilution loss is small.

[0040] Compared with the traditional mining method, the method provided by the application avoids the large dilution loss of ore caused by a large number of shafts arranged in the mining process, and avoids the large mining and cutting ratio caused by the conflict of mining preparation engineering caused by different mining methods in the same ore block. The method has wide practicability for small and medium-sized mines with multiple lodes, poor lode stability, and thin to extremely thin lode thickness.

[0041] Further, in some embodiments of the application, in step S1, the height of the middle section is 40-50 m, 3-4 sub-sections are divided in each middle section along the vertical direction, and 3-4 sublevels are divided in each sub-section along the vertical direction. In this way, each sublevel can be used as a stoping unit, and the ore body 1 can be mined layer by layer in the order from bottom to top. In some embodiments of the application, the required mining preparation engineering can also be set according to the needs, for example, the middle section transportation roadway 5 corresponding to each middle section can be arranged outside the lode.

[0042] Further, in some embodiments of the application, in step S2, multiple stope communication passages 6 can be excavated from the sub-section roadway 2 to the same sublevel, and the multiple stope communication passages 6 can be arranged at intervals along the strike of the ore body 1, and the interval between adjacent stope communication passages 6 is preferably 40-60 m, and more preferably 50 m.

[0043] Further, in some embodiments of the present application, in step S3, the processes of the stope excavation in each vein, the stoping and filling of the ore room, the stoping and filling of the pillar 8 and the drift 6 are simultaneously performed, which effectively improves the mining efficiency. The excavation length of the stope excavation is preferably 20-30 m, and the width of the pillar 8 reserved on both sides of the drift 6 is preferably 2.5-3.5 m; when the ore room is stopped, the stoping height is preferably 4-4.5 m; when the ore room is filled, the filling height is preferably 2.5-3.5 m. When the drift 6 and the pillar 8 on both sides thereof are stopped, the pillar 8 is stopped to the same height as the stope filling surface, and the drift 6 is roofed to a position higher than the stope filling surface; when the pillar 8 and the goaf of the drift 6 are filled, the filling height is kept consistent with the stope filling surface. When the drift 6 and the pillar 8 on both sides thereof are stopped, the drift 6 is preferably roofed to a position 2.5-3.5 m higher than the stope filling surface.

[0044] In the above embodiments, by controlling the stoping and filling height of the pillar 8 and the drift 6, not only the part of the drift 6 higher than the stope filling surface can be used as a walking channel for vehicles and pedestrians, but also the drift 6 and the pillar 8 on both sides thereof can be used for the next stoping, which realizes the continuous operation of the processes of stoping, filling and layer transfer while ensuring safe and efficient stoping.

[0045] In some embodiments of the present application, in step S3, different types of filling materials can be selected as needed when the ore room is filled, so as to form high-strength filling bodies 11 and / or low-strength filling bodies 12. The selection of specific filling materials and the strength of the filling bodies can be selected and adjusted according to actual needs, and the present application is not limited thereto. In step S3, the stoping method can be blasting stoping by setting stoping blast holes 9. The specific setting method and blasting method of the stoping blast holes 9 can be selected and adjusted according to actual needs, and the present application is not limited thereto. After blasting stoping, the ore will form a blast pile 10, which can be transported to the vein outside the chute 3 for ore drawing.

[0046] In the ore drawing process, the vein with a thickness > 2 m can directly use a shovel truck to transport the ore to the vein outside the chute 3 for ore drawing, but for the thin and extremely thin ore body 1, the shovel truck ore drawing will cause great dilution of the ore, and the traditional electric rake ore drawing method is to arrange a chute in front of the electric rake chamber, but this method has low ore drawing efficiency. Based on this, the present application improves the ore drawing method for the extremely thin vein with a vein thickness ≤ 2 m. The present application uses an electric rake to rake the ore to the drift 6, and then uses a scraper and a mine car arranged in the drift 6 to transport the ore to the vein outside the chute 3. This electric rake + scraper + mine car ore drawing method effectively improves the ore drawing efficiency while reducing the dilution loss compared with the traditional method.

[0047] A specific embodiment is listed below, it should be noted that the embodiment described below is exemplary, only for explaining the present application, and cannot be understood as a limitation of the present application. If the specific technology or condition is not indicated in the embodiment, it is carried out according to the technology or condition described in the literature in the art or according to the product instruction.

[0048] Embodiment 1

[0049] The embodiment provides a upward horizontal slicing filling mining method suitable for thin to extremely thin multiple veins, and specifically comprises the following steps.

[0050] S1. The middle section is divided according to the vertical height of the ore body 1, the height of the middle section is 50 m, each middle section is divided into three subsections, and each subsection is divided into four layers. The middle section transportation roadway 5 corresponding to each middle section, the subsection roadway 2 corresponding to each subsection and the vein outside draw shaft 3 for ore drawing are arranged outside the vein, and the subsection roadway 2 is communicated with the vein outside draw shaft 3 through the draw shaft connecting channel 4.

[0051] S2. A plurality of stope connecting channels 6 are excavated from the subsection roadway 2 to the layers, the section size of each stope connecting channel 6 is 3.0 m*2.7 m, the plurality of stope connecting channels 6 are arranged at intervals along the strike of the ore body 1, and the interval between adjacent stope connecting channels 6 is 50 m. After the stope connecting channel 6 enters the layer, it is excavated from the lower wall to the upper wall, so as to pass through each vein between the upper wall and the lower wall, and the filling air return shaft 7 is arranged at the end of the stope connecting channel 6.

[0052] S3. The bottom is excavated in each vein along the strike of the ore body 1 on both sides of the stope connecting channel 6 synchronously, the size of the excavation section is determined according to the thickness of the corresponding vein, and the excavation length is 25 m. Based on this, the bottom roadway with a length of 25 m is formed on both sides of the stope connecting channel 6, then 3 m of the ore pillar 8 is reserved on both sides of the stope connecting channel 6, and then the ore room is mined by expanding the side and pressing the roof from the outside of the ore pillar 8, and the mining height is 4.5 m. Among them, the setting of the ore pillar 8 can avoid the communication of the ore rooms on both sides to form a large ore room with a length of about 50 m, and overcome the problem that the large exposure area is not conducive to the stability of the stope. After the ore room mining is completed, the goaf of the ore room is filled through the filling air return shaft 7, the filling height is 3 m, and the stope filling surface is formed. After the ore room filling is completed and reaches the initial setting state, the stope connecting channel 6 and the ore pillar 8 on both sides thereof are mined, and after the mining is completed, the goaf of the ore pillar 8 and the stope connecting channel 6 is filled, and after the strength of the filling body reaches the standard, the mining and filling of the layer are completed.

[0053] Specifically, please refer to Figure 4 , Figure 4The first image shows a schematic diagram after the stope has been mined and backfilled. At this stage, pillar 8 and stope connecting roadway 6 have not yet been mined. During the mining of stope connecting roadway 6 and the pillars 8 on both sides, the pillars 8 are mined back to the same height as the stope backfill face, and the stope connecting roadway 6 is topped to a position 3 meters higher than the stope backfill face, thus forming... Figure 4 The second image shows a convex-shaped goaf. Then, the goaf areas of pillar 8 and stope connecting roadway 6 are filled, ensuring the filling height matches the height of the stope filling surface, thus forming... Figure 4 The structure in the third figure shows that the square goaf above the filling surface of the stope can not only serve as a passage for vehicles and pedestrians, but also as a stope connection road 6 for the next mining step. The pillars 8 retained on both sides can also serve as protective pillars 8 in the next stope mining process. Before mining, it is only necessary to excavate a passage to the stope at the position of pillar 8. In this way, continuous operation of mining, filling and layer transfer can be achieved while ensuring safe and efficient mining.

[0054] In the above steps, the mined ore is transported to the external pass 3 for extraction. The specific transportation method is determined according to the thickness of the ore vein: when the thickness of the ore vein is >2m, a loader is used to transport the ore to the external pass 3 during extraction; when the thickness of the ore vein is ≤2m, an electric scraper is first used to scrape the ore to the stope connecting roadway 6, and then the ore is transported to the external pass 3 by a slag remover and mine cars installed in the stope connecting roadway 6. This effectively improves extraction efficiency while reducing dilution losses.

[0055] S4. Following the above method, perform backfilling and extraction on each layer sequentially from bottom to top. For details, please refer to the relevant documentation. Figure 4 In formation Figure 4 After the mining area structure in the third picture, Figure 4 The square goaf serves as the stope connection roadway 6. From stope connection roadway 6, tunnels are excavated through pillar 8 to both sides to form bottom-pull roadways. Following the steps described above, the sidewalls are widened and the roof is compressed from the outside of pillar 8, and the stope is then mined, thus forming... Figure 4 The fourth image shows the process of continuing to fill the mined-out stope to form... Figure 4 The fifth image shows the completion of the mining and backfilling of the stope. Then, the same method is used to continue mining and backfilling pillar 8 and stope connecting roadway 6. This cycle is repeated for each layer until the mining of ore body 1 is complete.

[0056] In summary, the application provides a upward horizontal slicing filling mining method suitable for thin to extremely thin multiple veins, and belongs to the technical field of mining. The mining method comprises the following steps: dividing the ore body 1 into corresponding middle sections, subsections and layers, and driving the stope communication way 6 from the subsection roadway 2 to the layer, so that the stope communication way 6 entering the layer penetrates each vein between the upper disc and the lower disc; the bottom of each vein is pulled and excavated along the strike of the ore body 1 on both sides of the stope communication way 6, a bottom-pulling roadway is formed, and a pillar 8 is reserved on both sides of the stope communication way 6, the roof is expanded and pressed from the outside of the pillar 8 to recover the ore room; after the recovery and filling of the ore room are completed, the stope communication way 6 and the pillars 8 on both sides thereof are recovered and filled; and then each layer is recovered and filled in turn from bottom to top. Through the above method, the method provided by the application can ensure the safe recovery of thin to extremely thin multiple veins, realize continuous operation of mining and filling, reduce dilution loss, and improve the economic benefit of the mine.

[0057] It should be noted that the application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and embodiments having the same technical idea and playing the same role and effect within the scope of the technical solution of the application are all included in the technical scope of the application. In addition, within the scope of the main idea of the application, various modifications of the embodiments that can be thought of by those skilled in the art, and other ways constructed by combining part of the constituent elements of the embodiments are also included in the scope of the application.

Claims

1. A method for upward horizontal layered filling mining suitable for thin to extremely thin multiple veins, characterized in that, Includes the following steps: S1. Divide the ore body into middle sections according to its vertical height, and divide each middle section into several sub-sections, and each sub-section into several layers; set up sub-section roadways and external ore passes outside the vein, and connect the sub-section roadways to the external ore passes through ore pass connecting passages; S2. The segmented roadway is excavated to the layered mining area connecting roadway. After entering the layered mining area, the connecting roadway is excavated from the footwall to the hanging wall, connecting all the veins between the hanging wall and the footwall; and a filling return air shaft is set at the end of the connecting roadway. S3. Along the ore body strike, bottom-running is carried out on both sides of the stope connecting roadway in each vein to form a bottom-running roadway. Pillars are then reserved on both sides of the stope connecting roadway. The stope is then excavated from the outside of the pillars. After the stope is mined, the goaf is filled through the filling return air shaft to form a stope filling face. After the stope filling is completed and reaches the initial setting state, the stope connecting roadway and the pillars on both sides are mined. After the mining is completed, the goaf of the pillars and the stope connecting roadway is filled. Once the filling strength meets the standard, the mining and filling of this layer is completed. When mining the stope connecting roadway and the pillars on both sides, the pillars are mined to the same height as the stope filling face, and the stope connecting roadway is topped to a position higher than the stope filling face. When filling the goaf of the pillars and the stope connecting roadway, the filling height is kept consistent with the stope filling face. S4. Each layer is extracted and filled in sequence from bottom to top.

2. The upward horizontal layered filling mining method applicable to thin to extremely thin multiple veins according to claim 1, characterized in that, When mining the connecting roadway and the pillars on both sides of the stope, the connecting roadway is topped to a position 2.5 to 3.5 meters higher than the filling surface of the stope.

3. The upward horizontal layered filling mining method applicable to thin to extremely thin multiple veins according to claim 1, characterized in that, In step S1, the height of the middle section is 40~50m, each middle section is divided into 3~4 segments, and each segment is divided into 3~4 layers.

4. The upward horizontal layered filling mining method applicable to thin to extremely thin multiple veins according to claim 1, characterized in that, In step S2, the mining connection channels are arranged at intervals along the strike of the ore body, with adjacent mining connection channels spaced 40-60m apart.

5. The upward horizontal layered filling mining method applicable to thin to extremely thin multiple veins according to claim 1, characterized in that, In step S3, the tunneling length of the bottom-pulling tunnel is 20-30m, and the width of the ore pillars reserved on both sides of the mining area connecting road is 2.5-3.5m.

6. The upward horizontal layered filling mining method applicable to thin to extremely thin multiple veins according to claim 1, characterized in that, In step S3, when reclaiming the ore chamber, the reclamation height is 4~4.5m; when filling the ore chamber, the filling height is 2.5~3.5m.

7. The upward horizontal layered filling mining method applicable to thin to extremely thin multiple veins according to claim 1, characterized in that, In step S3, the mined ore is transported to the external ore pass for extraction.

8. The upward horizontal layered filling mining method applicable to thin to extremely thin multiple veins according to claim 7, characterized in that, When the thickness of the ore vein is ≤2m, an electric scraper is first used to scrape the ore to the stope connecting roadway during ore extraction. Then, the ore is transported to the external pass through the slag loader and mine cars installed in the stope connecting roadway.

9. The upward horizontal layered filling mining method applicable to thin to extremely thin multiple veins according to claim 7, characterized in that, When the thickness of the ore vein is greater than 2m, a loader is used to transport the ore to the external pass during ore extraction.

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