Upward horizontal layered filling mining method suitable for multiple thin to extremely thin ore veins

Abstract

The invention provides an upward horizontal layered filling mining method suitable for multiple thin to extremely thin ore veins, and belongs to the technical field of mining. The mining method comprises the following steps of: dividing an ore body into corresponding middle sections, sections and layers, and tunneling stope connection ways from section roadways to the layers, so that the stope connection ways entering the layers penetrate through each vein between an upper wall and a lower wall; undercutting and tunneling in each vein along the trend of the ore body on the two sides of the stope cross gateway to form undercutting roadways, reserving ore pillars on the two sides of the stope cross gateway, and starting to expand the outer sides of the ore pillars, coping and stoping a room; after stoping and filling of the chambers are completed, stoping and filling are carried out on stope connection ways and pillars on the two sides of the stope connection ways; and then stoping and filling are conducted on all the layers in sequence from bottom to top. Through the mode, the method provided by the invention can realize continuous operation of mining and filling while ensuring safe stoping of multiple thin to extremely thin ore veins, reduce dilution loss and improve economic benefits of mines.

Description

Technical Field

[0001] The invention relates to the technical field of mining, and in particular to an upward horizontal layered filling mining method suitable for thin to extremely thin multiple ore veins. Background Art

[0002] According to different ore body conditions, scholars have studied different mining methods, which have greatly benefited underground mining. However, there are still some difficult-to-mine ore bodies, making it difficult for traditional mining methods to achieve good recovery results.

[0003] For example, when there are multiple veins of varying thickness, large inclination changes, and locally broken veins in the direction of the ore body, most mines currently still use traditional shallow hole ore retention method, shallow hole ore retention and subsequent filling method, and electric rake ore removal upward layered mining method for mining. Although these mining methods do not require off-vein mining and preparation engineering, they will result in a large number of skylights, and personnel, materials, and equipment need to be operated in the skylights, which poses a high safety risk. Among them, when mining with the shallow hole ore retention method, regardless of whether it is filled later, it will face the loss of the remaining pillars, which is a great waste of mine resources. When the thickness of the ore body is thin, the use of electric rakes to mine is not only inefficient, but also very easy to cause the mixing of filling bodies, resulting in ore depletion; at the same time, the mechanization degree of this mining method is low. In the general environment where mining technology is advancing towards mechanization and intelligence, this mining method may face the risk of being eliminated. In addition, for ore bodies with multiple veins in the strike direction and the thickness of the veins is thin to very thin, the existing mining methods tend to increase the exposed area of ​​the top space, causing the roof to collapse easily, affecting the stability of the mining site.

[0004] In view of this, it is necessary to design a safe and efficient mining method with less depletion loss and continuous recovery and filling for such difficult-to-mine thin to extremely thin multiple veins to solve the above problems. Summary of the invention

[0005] In view of the technical problems existing in the background technology, the purpose of this application is to provide an upward horizontal layered filling mining method suitable for multiple thin to extremely thin ore veins, which can achieve continuous operation of mining and filling while ensuring the safe recovery of multiple thin to extremely thin ore veins, reduce depletion losses, and improve the economic benefits of the mine.

[0006] The present application embodiment provides an upward horizontal layered filling mining method applicable to thin to very thin multiple veins, comprising the following steps:

[0007] S1. According to the vertical height of the ore body, the middle section is divided into several sections, and each section is divided into several layers; a segmented roadway and a chute outside the vein are set, and the segmented roadway is connected to the chute outside the vein through a chute contact road;

[0008] S2. The stope connection road is excavated from the segmented roadway to the layered road. After the stope connection road enters the layered road, it is excavated from the lower plate to the upper plate, and the veins between the upper plate and the lower plate are connected; and a filling return air shaft is set at the end of the stope connection road;

[0009] S3. Carry out bottom excavation in each vein along the ore body on both sides of the stope connection road. After forming the bottom lane, reserve ore pillars on both sides of the stope connection road respectively, and then expand the wall and press the top back to the mining room from the outside of the ore pillars; after the mining of the mining room is completed, fill the goaf of the mining room through the filling return air shaft to form the stope filling surface; after the filling of the mining room is completed and reaches the initial setting state, the stope connection road and the ore pillars on both sides are mined, and after the mining is completed, the goaf of the ore pillars and the stope connection road is filled, and after the strength of the filling body reaches the standard, the mining and filling of the layer are completed;

[0010] S4. Mining and filling each layer in order from bottom to top.

[0011] In the technical solution of the embodiment of the present application, by connecting the mining field connecting roads through each ore vein, it is possible to achieve the synchronous recovery, filling and layer transfer of multiple ore veins. When recovering the ore veins in each layer, by reserving ore pillars on both sides of the mining field connecting road, it is possible to avoid the mine rooms on both sides of the mining field connecting road from being connected to form a large mine room, effectively reducing the exposed area and improving the stability of the mining field. On this basis, by first recovering and filling the mine room, and then recovering the ore pillars and the mining field connecting roads, it is possible to achieve safe recovery of the ore pillars while ensuring the stability of the mining field, with a high resource recovery rate and low depletion losses.

[0012] In some embodiments, in step S3, when mining the mine connecting road and the pillars on both sides thereof, the pillars are mined to the same height as the mine filling surface, and the mine connecting road is pressed to a position higher than the mine filling surface; when filling the goaf of the pillars and the mine connecting road, the filling height is kept consistent with the mine filling surface.

[0013] In this embodiment, by controlling the mining and filling heights of the ore pillars and the mine connecting roads, the portion of the mine connecting roads that is higher than the mine filling surface can be used as a passage for vehicles and pedestrians, and the mine connecting roads and the ore pillars on both sides of the mine can also be used for the next step of mining, thereby ensuring safe and efficient mining while achieving continuous operation of the mining, filling and layer transfer processes.

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

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

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

[0017] In some embodiments, in step S3, the excavation length of the bottom excavation is 20-30 m, and the width of the ore pillars reserved on both sides of the stope connecting road is 2.5-3.5 m.

[0018] In some embodiments, in step S3, when mining the mine chamber, the mining height is 4 to 4.5 m; when filling the mine chamber, the filling height is 2.5 to 3.5 m.

[0019] In some embodiments, in step S3, the mined ore is transported to the off-vein chute for unearthing.

[0020] In some embodiments, when the thickness of the ore vein is ≤2m, the ore is first raked to the mine connecting road with an electric rake, and then the ore is transported to the outer chute of the vein by a scraper and a mine car arranged in the mine connecting road.

[0021] In some embodiments, when the thickness of the ore vein is greater than 2 m, a shovel loader is used to transport the ore to the outer chute when mining.

[0022] The beneficial effects of this application are:

[0023] The upward horizontal layered filling mining method provided by the present application is applicable to multiple thin to extremely thin ore veins. By connecting the stope connection roads through each ore vein, and recovering each ore vein along the ore body direction from both sides of the stope connection roads, it is possible to achieve safe, efficient and continuous operation of synchronous recovery, synchronous filling and synchronous layer transfer of multiple ore veins. At the same time, when recovering each ore vein, the present application reserves ore pillars on both sides of the stope connection roads, first recovers and fills the mine room, and then recovers and fills the ore pillars and the stope connection roads, so that the stope structural parameters are relatively small. On the premise of ensuring the stability of the stope, the safe recovery of the ore pillars is achieved, with a high resource recovery rate and a small depletion loss, which effectively improves the economic benefits of the mine. Compared with traditional mining methods, the method provided by the present application not only avoids the disadvantages of large ore depletion losses caused by the large number of skylights arranged during the mining process, but also avoids the disadvantages of large mining and cutting caused by mining engineering conflicts caused by the use of different mining methods in the same ore block. It has a wide range of practical applications for small and medium-sized mines with multiple ore veins, poor ore vein stability, and thin to extremely thin ore veins. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings used in the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic diagram of the main view of the stope structure during the mining process of the upward horizontal layered filling mining method applicable to thin to very thin multiple veins provided in the embodiment of the present application, i.e., a schematic diagram in the direction II;

[0026] Figure 2 A schematic side view of the stope structure of the upward horizontal layered filling mining method applicable to thin to very thin multiple veins during the mining process provided in the embodiment of the present application, i.e., a schematic view in the direction II-II;

[0027] Figure 3 A schematic diagram of a top view of a stope structure during the mining process of an upward horizontal layered filling mining method applicable to thin to very thin multiple ore veins provided in an embodiment of the present application, i.e., a schematic diagram in the direction III-III;

[0028] Figure 4 A schematic diagram of a recovery plan for mine room pillars and stope connecting roads in an upward horizontal layered filling mining method applicable to thin to very thin multiple veins provided in an embodiment of the present application.

[0029] Explanation of the accompanying reference numerals: 1. Ore body; 2. Segmented tunnel; 3. Extra-vein chute; 4. Chute connecting tunnel; 5. Middle section transport tunnel; 6. Mining field connecting tunnel; 7. Filling return air shaft; 8. Mine pillar; 9. Mining blast hole; 10. Explosion pile; 11. High-strength filling body; 12. Low-strength filling body. DETAILED DESCRIPTION

[0030] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0032] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] Since traditional mining methods such as shallow hole ore retention, shallow hole ore retention and subsequent filling, and upward layered mining with electric rake are not suitable for the mining of multiple thin to extremely thin veins, this application improves the traditional upward horizontal layered filling mining method so that it can achieve continuous mining and filling operations while ensuring the safe mining of multiple thin to extremely thin veins, reduce depletion losses, and improve the economic benefits of the mine.

[0034] For details, please refer to Figure 1-4 The present application embodiment provides an upward horizontal layered filling mining method applicable to thin to very thin multiple veins, comprising the following steps:

[0035] S1. According to the vertical height of the ore body 1, the middle section is divided into several sections, and each section is divided into several layers; a segmented roadway 2 and a chute 3 outside the vein are set, and the segmented roadway 2 is connected to the chute 3 outside the vein through a chute connecting road 4;

[0036] S2. The stope connection road 6 is excavated from the segmented tunnel 2 to the layered stope. After the stope connection road 6 enters the layered stope, it is excavated from the lower plate to the upper plate, and penetrates the various veins between the upper plate and the lower plate; and a filling return air shaft 7 is set at the end of the stope connection road 6;

[0037] S3. On both sides of the stope connection road 6, bottom excavation is carried out in each ore vein along the direction of the ore body 1. After the bottom lane is formed, ore pillars 8 are reserved on both sides of the stope connection road 6, and then the sidewalls are expanded and the top is pressed back to the mining room from the outside of the ore pillars 8; after the mining of the mining room is completed, the goaf of the mining room is filled through the filling return air shaft 7 to form a stope filling surface; after the filling of the mining room is completed and reaches the initial setting state, the stope connection road 6 and the ore pillars 8 on both sides are mined, and after the mining is completed, the ore pillars 8 and the goaf of the stope connection road 6 are filled, and after the strength of the filling body reaches the standard, the mining and filling of the layer are completed;

[0038] S4. Mining and filling each layer in order from bottom to top.

[0039] In the technical solution of the embodiment of the present application, by connecting the stope connection road 6 through each ore vein, it is possible to achieve the synchronous recovery, filling and layer transfer of multiple ore veins. When recovering the ore veins in each layer, by reserving ore pillars 8 on both sides of the stope connection road 6, it is possible to avoid the mine rooms on both sides of the stope connection road 6 from connecting to form a large mine room, effectively reducing the exposed area and improving the stability of the stope. On this basis, by first recovering and filling the mine room, and then recovering the ore pillars 8 and the stope connection road 6, it is possible to achieve safe recovery of the ore pillars 8 while ensuring the stability of the stope, with a high resource recovery rate and low depletion losses.

[0040] Compared with traditional mining methods, the method provided by the present application not only avoids the disadvantages of large ore depletion losses caused by the large number of skylights arranged during the mining process, but also avoids the disadvantages of large mining and cutting caused by mining engineering conflicts caused by the use of different mining methods in the same ore block. It has a wide range of practical applications for small and medium-sized mines with multiple ore veins, poor ore vein stability, and thin to extremely thin ore veins.

[0041] Further, in some embodiments of the present application, in step S1, the height of the middle section is 40 to 50 m, each middle section is divided into 3 to 4 sections in the vertical direction, and each section is divided into 3 to 4 layers in the vertical direction. In this way, each layer can be used as a mining unit, and the mining of the ore body 1 can be completed by mining layer by layer in a bottom-up order. In some embodiments of the present application, the required mining and approval engineering can also be set as needed, for example, a middle section transportation tunnel 5 corresponding to each middle section can be set outside the vein.

[0042] Furthermore, in some embodiments of the present application, in step S2, multiple mining connection roads 6 can be excavated from the segmented tunnel 2 to the same layer, and the multiple mining connection roads 6 can be arranged at intervals along the direction of the ore body 1. The interval between adjacent mining connection roads 6 is preferably 40 to 60m, and more preferably 50m.

[0043] Furthermore, in some embodiments of the present application, in step S3, the bottom excavation, mining and filling of the mine room, mining and filling of the pillars 8 and the mine contact road 6 in each ore vein are carried out simultaneously, which effectively improves the mining efficiency. Among them, the excavation length of the bottom excavation is preferably 20 to 30 meters, and the width of the pillars 8 reserved on both sides of the mine contact road 6 is preferably 2.5 to 3.5 meters; when mining the mine room, the mining height is preferably 4 to 4.5 meters; when filling the mine room, the filling height is preferably 2.5 to 3.5 meters. When mining the mine contact road 6 and the pillars 8 on both sides thereof, the pillars 8 are mined to the same height as the mine filling surface, and the mine contact road 6 is pressed to a position higher than the mine filling surface; when filling the goaf of the pillars 8 and the mine contact road 6, the filling height is kept consistent with the mine filling surface. When the stope connection road 6 and the pillars 8 on both sides thereof are mined, it is preferred that the stope connection road 6 be pressed to a position 2.5 to 3.5 m higher than the stope filling surface.

[0044] In the above embodiment, by controlling the mining and filling heights of the ore pillars 8 and the mining connecting roads 6, not only can the portion of the mining connecting roads 6 that is higher than the mining filling surface be used as a passage for vehicles and pedestrians, the mining connecting roads 6 and the ore pillars 8 on both sides thereof can also be used for the next step of mining, thereby ensuring safe and efficient mining while achieving continuous operation of the mining, filling and layer transfer processes.

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

[0046] In the mining process, for veins with a thickness of more than 2m, a shovel loader can be used to directly transport the ore to the vein chute 3 for mining. However, for thin to extremely thin ore bodies 1, mining by a shovel loader will cause great dilution of the ore. The traditional electric rake mining method is to arrange a chute in front of the electric rake chamber, but this method has low mining efficiency. Based on this, the present application improves the mining method for extremely thin veins with a vein thickness of ≤2m. The present application uses an electric rake to rake the ore to the mining field connecting road 6, and then transports the ore to the vein chute 3 by a slag scraper and a mine car arranged in the mining field connecting road 6. Compared with the traditional method, this mining method of electric rake + slag scraper + mine car effectively improves the mining efficiency while reducing the dilution loss.

[0047] A specific embodiment is listed below. It should be noted that the embodiment described below is exemplary and is only used to explain the present application, and cannot be understood as limiting the present application. If no specific technology or conditions are specified in the embodiment, the technology or conditions described in the literature in the field or the product instructions shall be followed.

[0048] Example 1

[0049] This embodiment provides an upward horizontal layered filling mining method applicable to thin to very thin multiple veins, which specifically includes the following steps:

[0050] S1. According to the vertical height of the ore body 1, the middle section is divided into 50m, each middle section is divided into 3 sections, and each section is divided into 4 layers. A middle section transportation lane 5 corresponding to each middle section, a segmented lane 2 corresponding to each section, and an outer vein chute 3 for ore removal are set outside the vein. The segmented lane 2 is connected to the outer vein chute 3 through a chute connecting lane 4.

[0051] S2. Multiple stope connection roads 6 are excavated from the segmented tunnel 2 to the layered section. The cross-sectional size of each stope connection road 6 is 3.0m×2.7m. Multiple stope connection roads 6 are arranged at intervals along the strike of the ore body 1, and the interval between adjacent stope connection roads 6 is 50m. After the stope connection road 6 enters the layered section, it is excavated from the lower wall to the upper wall so that it penetrates all the ore veins between the upper wall and the lower wall, and a filling return air shaft 7 is set at the end of the stope connection road 6.

[0052] S3. On both sides of the mine contact road 6, bottom excavation is carried out simultaneously in each vein along the direction of the ore body 1. The size of the excavation section is determined according to the thickness of the corresponding vein, and the excavation length is 25m. Based on this, bottom tunnels with a length of 25m are formed on both sides of the mine contact road 6, and then 3m mine pillars 8 are reserved on both sides of the mine contact road 6, and then the top is expanded from the outside of the mine pillars 8 to recover the mine room, and the recovery height is 4.5m. Among them, the setting of the mine pillars 8 can avoid the mine rooms on both sides from being connected to form a large mine room with a length of about 50m, overcoming the problem that the exposed area is too large and is not conducive to the stability of the mine. After the mine room is recovered, the goaf of the mine room is filled by filling the return air shaft 7, and the filling height is 3m to form a mine filling surface. After the mine room is filled and reaches the initial setting state, the mining area connecting road 6 and the pillars 8 on both sides thereof are mined. After the mining is completed, the goaf of the pillars 8 and the mining area connecting road 6 are filled. After the strength of the filling body reaches the standard, the mining and filling of the layer are completed.

[0053] For details, please refer to Figure 4 , Figure 4The first figure in the figure is a schematic diagram after the mining and filling of the mine room is completed. At this time, the pillars 8 and the mine contact road 6 have not been mined yet. When the mine contact road 6 and the pillars 8 on both sides are mined, the pillars 8 are mined to the same height as the mine filling surface, and the mine contact road 6 is pressed to a position 3m higher than the mine filling surface, forming Figure 4 The "convex" goaf in the second figure is then filled with the goaf of the pillar 8 and the goaf connecting road 6, and the filling height is kept consistent with the height of the goaf filling surface, that is, Figure 4 In the structure of the third figure, the square goaf area on the upper part of the filling surface of the mining field can not only be used as a passage for vehicles and pedestrians, but also as a mining field connecting road 6 for the next step of mining. The pillars 8 retained on both sides can also be used as protective pillars 8 in the next step of mining in the mine room. Before mining, it is only necessary to dig a passage to the mining field at the position of the pillars 8. In this way, the continuous operation of the mining, filling and layer transfer processes can be achieved while ensuring safe and efficient mining.

[0054] The mined ore in the above steps is transported to the outer chute 3 for unearthing, and the specific transportation method is determined according to the thickness of the ore vein: when the thickness of the ore vein is greater than 2m, a shovel loader is used to transport the ore to the outer chute 3 for unearthing; when the thickness of the ore vein is less than or equal to 2m, an electric rake is first used to rake the ore to the mining field connecting road 6, and then the ore is transported to the outer chute 3 by the scraper and mine car arranged in the mining field connecting road 6, which effectively improves the unearthing efficiency while reducing the depletion loss.

[0055] S4. According to the above method, each layer is mined and filled in order from bottom to top. Figure 4 , in the formation Figure 4 After the stope structure in the third picture, Figure 4 The square goaf in the middle is used as the mining field contact road 6, and the mining field contact road 6 passes through the ore pillar 8 to dig the bottom lane to both sides, and expand the wall and press the top from the outside of the ore pillar 8 in the manner described in the above steps to recover the mine room, thus forming Figure 4 The fourth picture in the figure; continue to fill the mining room after recovery to form Figure 4 The fifth figure in the figure shows that the mining and filling of the mine room are completed. After that, the mining and filling of the pillars 8 and the stope connection road 6 are continued in the same way, and each layer is mined in this cycle to complete the mining of the ore body 1.

[0056] In summary, the present application provides an upward horizontal layered filling mining method suitable for thin to extremely thin multiple veins, belonging to the field of mining technology. The mining method includes: dividing the ore body 1 into corresponding middle sections, sections and layers, and excavating the mining field connection road 6 from the sectioned roadway 2 to the layers, so that the mining field connection road 6 entering the layers penetrates each vein between the upper plate and the lower plate; on both sides of the mining field connection road 6, along the direction of the ore body 1, the bottom is excavated in each vein, and after the bottom lane is formed, the ore pillars 8 are reserved on both sides of the mining field connection road 6, and the top is expanded and pressed from the outside of the ore pillars 8 to return to the mining room; after completing the mining and filling of the mining room, the mining field connection road 6 and the ore pillars 8 on both sides are mined and filled; then, each layer is mined and filled in sequence from bottom to top. In the above manner, the method provided by the present application can realize the continuous operation of mining and filling while ensuring the safe mining of thin to extremely thin multiple veins, and reduce the dilution loss and improve the economic benefits of the mine.

[0057] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and the embodiments having the same structure as the technical idea and exerting the same effect within the scope of the technical solution of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the main purpose of the present application, various modifications that can be thought of by those skilled in the art to the embodiments and other methods of combining some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A method of upward horizontal layered filling mining suitable for thin to very thin multiple veins, characterized in that: The steps include: S1. According to the vertical height of the ore body, the middle section is divided into several sections, and each section is divided into several layers; a segmented roadway and a chute outside the vein are set, and the segmented roadway is connected to the chute outside the vein through a chute contact road; S2. The stope connection road is excavated from the segmented roadway to the layered road. After the stope connection road enters the layered road, it is excavated from the lower plate to the upper plate, and the veins between the upper plate and the lower plate are connected; and a filling return air shaft is set at the end of the stope connection road; S3. Carry out bottom excavation in each vein along the ore body on both sides of the stope connection road. After forming the bottom lane, reserve ore pillars on both sides of the stope connection road respectively, and then expand the wall and press the top back to the mining room from the outside of the ore pillars; after the mining of the mining room is completed, fill the goaf of the mining room through the filling return air shaft to form the stope filling surface; after the filling of the mining room is completed and reaches the initial setting state, the stope connection road and the ore pillars on both sides are mined, and after the mining is completed, the goaf of the ore pillars and the stope connection road is filled, and after the strength of the filling body reaches the standard, the mining and filling of the layer are completed; S4. Mining and filling each layer in order from bottom to top.

2. The upward horizontal layered filling mining method applicable to thin to very thin multiple veins according to claim 1 is characterized in that: In step S3, when mining the mine connecting road and the pillars on both sides thereof, the pillars are mined to the same height as the mine filling surface, and the mine connecting road is pressed to a position higher than the mine filling surface; when filling the goaf of the pillars and the mine connecting road, the filling height is kept consistent with the mine filling surface.

3. The upward horizontal layered filling mining method applicable to thin to very thin multiple veins according to claim 2 is characterized in that: When the stope connection road and the pillars on both sides thereof are mined, the stope connection road is pressed to a position 2.5 to 3.5 m higher than the stope filling surface.

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

5. The upward horizontal layered filling mining method applicable to thin to very thin multiple veins according to claim 1 is characterized in that: In step S2, the stope connection roads are arranged at intervals along the strike of the ore body, and the interval between adjacent stope connection roads is 40 to 60 m.

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

7. The upward horizontal layered filling mining method applicable to thin to very thin multiple veins according to claim 1 is characterized in that: In step S3, when mining the chamber, the mining height is 4 to 4.5 m; when filling the chamber, the filling height is 2.5 to 3.5 m.

8. The upward horizontal layered filling mining method applicable to thin to very thin multiple veins according to claim 1, characterized in that: In step S3, the recovered ore is transported to the outer chute for unearthing.

9. The upward horizontal layered filling mining method applicable to thin to very thin multiple veins according to claim 8, characterized in that: When the thickness of the ore vein is ≤2m, the ore is first raked to the mine contact road with an electric rake, and then the ore is transported to the outer chute of the vein by a slag scraper and a mine car arranged in the mine contact road.

10. The upward horizontal layered filling mining method applicable to thin to very thin multiple veins according to claim 8, characterized in that: When the thickness of the ore vein is greater than 2m, a shovel loader is used to transport the ore to the outer chute of the vein when mining.

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