Zigzag continuous sub-mining and sub-out extraction process for metal mine extremely thin veins

Abstract

The application provides a zigzag continuous sub-mining and sub-extraction mining process for metal mine extremely thin veins, and belongs to the technical field of metal mine extremely thin vein mining. The mining process comprises the following steps: a vein passing roadway is sequentially constructed through the lower wall rock, the ore body and the upper wall rock in the mining sublevel construction; a floor pulling roadway is constructed in the upper wall rock and the lower wall rock from the vein passing roadway respectively, a cutting shaft and a floor pulling blast hole are constructed in the floor pulling roadway, the upper wall rock and the lower wall rock are blasted, the waste rock after blasting is transported out of the stope, and an upper wall compensation space and a lower wall compensation space are formed; an ore body blast hole is constructed in the ore body, and the upper wall compensation space and the lower wall compensation space are used as free surfaces for blasting and mining, and the sub-mining and sub-extraction of the mining sublevel are completed. In the above manner, the upper wall rock and the lower wall rock of the extremely thin vein are divided into compensation spaces in a zigzag shape, and then combined with continuous mining blasting, the sub-mining and sub-extraction of the extremely thin vein are realized, and the loss and dilution of the ore are effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of mining technology for extremely thin veins in metal mines, specifically to a zigzag continuous mining and extraction process for extremely thin veins in metal mines. Background Technology

[0002] The thickness of extremely thin veins in metal mines is usually less than 0.8m, and they are mostly found in vein-like minerals such as gold and tungsten. Mining of these veins is mainly done underground, and the current mainstream mining techniques include wall cutting and filling, upward layered filling, shallow hole ore retention, and room and pillar methods.

[0003] However, the limited working space in extremely thin veins of metal mines restricts the layout of blasting holes, leading to frequent over-excavation and under-excavation, resulting in high losses and dilution, and a double loss of resources and profits. Furthermore, controlling the mining width of extremely thin veins is difficult, and incomplete mining can easily lead to the mixing of waste rock, further exacerbating dilution. Moreover, the hanging wall and footwall of extremely thin veins are prone to instability and mixing, causing the dilution rate to rise further.

[0004] In view of this, how to efficiently separate ore and waste rock in extremely thin veins of metal mines in order to reduce ore loss and dilution is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] In view of the technical problems existing in the background art, this application provides a zigzag continuous mining and extraction process for extremely thin veins in metal mines. By dividing the upper and lower wall surrounding rocks of the extremely thin vein into compensation spaces in a zigzag pattern, and then combining it with continuous mining blasting, the extraction and extraction of the extremely thin vein is realized, which effectively reduces the loss and dilution of ore and achieves safe, economical and efficient mining of extremely thin veins in metal mines.

[0006] This application provides a zigzag continuous mining and extraction process for extremely thin veins in metal mines, comprising the following steps: Arrange the mining area and determine the mining sections; A cross-vein tunnel is constructed from the footwall external connecting roadway of the mining section to the ore body, and the cross-vein tunnel passes through the footwall surrounding rock, the ore body and the hanging wall surrounding rock in sequence. Taking the location where the cross-vein tunnel passes through the upper wall surrounding rock as the first starting point, an upper wall bottom tunnel is constructed within the upper wall surrounding rock along a first direction; taking the location where the cross-vein tunnel passes through the lower wall surrounding rock as the second starting point, a lower wall bottom tunnel is constructed within the lower wall surrounding rock along a second direction; the first direction and the second direction are opposite. In the upper plate bottom-pulling tunnel, an upper plate cutting ceiling is constructed at the end furthest from the first starting point, and upper plate bottom-pulling blast holes are constructed near the upper plate cutting ceiling; in the lower plate bottom-pulling tunnel, a lower plate cutting ceiling is constructed at the end furthest from the second starting point, and lower plate bottom-pulling blast holes are constructed near the lower plate cutting ceiling. The upper and lower wall surrounding rocks are blasted through the upper and lower wall bottom blast holes respectively, and the blasted waste rock is transported out of the mining area to form upper and lower wall compensation spaces. Ore blasting holes are constructed within the ore body, and blasting is carried out using the upper and lower footwall compensation spaces as free faces. The blasted ore is then transported out of the mining area, completing the separation of the mining sections.

[0007] In some embodiments, the arrangement of the mining area and the determination of the mining sections include: The ore body to be mined is divided into sections along the height direction, and the mining area is arranged along the strike of the ore body within each section. The mining between each section is carried out in a bottom-up order.

[0008] In some embodiments, blasting and mining are carried out using the upper and lower compensation spaces as free faces, including: The ore body near the upper compensation space is divided into the first unit, and the ore body near the lower compensation space is divided into the second unit. The first unit and the second unit are blasted and mined in sequence, so that the first unit and the second unit fall ore into the upper compensation space and the lower compensation space in an alternating manner.

[0009] In some embodiments, after the mining of the mining section is completed, the process also includes stope filling and curing. After the curing is completed, the upper mining section is mined in a bottom-up order.

[0010] In some embodiments, the tunnel dimensions of the cross-vein tunnel are 2m~3m×2m~3m.

[0011] In some embodiments, the upper cutting ceiling and the lower cutting ceiling are both 2m~3m×2m~3m in size.

[0012] In some embodiments, the row spacing of the upper plate bottom-pull blast holes and the lower plate bottom-pull blast holes are both 0.8~1.2m, the hole spacing is both 0.3~0.5m, and the hole depth is both 8~10m.

[0013] In some embodiments, the row spacing of the ore body boreholes is 0.3~0.5m, the hole spacing is 0.6~1.0m, and the hole depth is 8~10m.

[0014] In some embodiments, the upper plate bottom blast hole, the lower plate bottom blast hole, and the ore body blast hole are all upward parallel blast holes.

[0015] In some embodiments, the thickness of the ore body is <0.8m.

[0016] The beneficial effects of this application include: The zigzag continuous mining and extraction process for extremely thin veins in metal mines provided in this application involves setting up vein tunnels that sequentially pass through the footwall, ore body, and hanging wall. Corresponding bottom-pulling tunnels are then constructed in a zigzag pattern into the hanging and footwall surrounding rocks. Using the cutting risers in these bottom-pulling tunnels as compensation spaces, bottom-pulling blast holes are constructed to blast parts of the hanging and footwall surrounding rocks. After the blasted waste rock is transported out of the stope, a zigzag-shaped compensation space is formed in the hanging and footwall. This ample compensation space can serve as a free face, reducing the blasting clamping effect and achieving safe and effective blasting of the ore body. Furthermore, it minimizes disturbance to the remaining surrounding rock during blasting, improving the safety of the stope operation and further reducing waste rock contamination. The above-mentioned mining method provided in this application can minimize the mixing of ore and waste rock while fully mining the ore body, effectively reducing ore loss and dilution, and achieving safe, economical and efficient mining of extremely thin veins in metal mines.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in this application will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0019] Figure 1 This is a side view of the structure formed in step S1 of the zigzag continuous mining process for extremely thin veins in metal mines, as described in Embodiment 1 of this application. Figure 2 This is a top view of the structure formed in step S1 of the zigzag continuous mining process for extremely thin veins in metal mines, as described in Embodiment 1 of this application. Figure 3This is a top view of the structure formed by steps S2-S3 in the zigzag continuous mining process for extremely thin veins in metal mines, as described in Embodiment 1 of this application. Figure 4 This is a top view of the structure formed in steps S4-S5 of the zigzag continuous mining process for extremely thin veins in metal mines in Embodiment 1 of this application. Figure 5 This is a side view of step S5, which involves ore falling through the upper compensation space in the zigzag continuous mining process for extremely thin veins in metal mines, as described in Embodiment 1 of this application. Figure 6 This is a side view of step S5, which involves ore falling through the lower footing compensation space in the zigzag continuous mining process for extremely thin veins in metal mines, as described in Embodiment 1 of this application.

[0020] Explanation of reference numerals in the attached diagram: 1. Hanging wall; 2. Ore body; 3. Footing wall; 4. External connecting roadway; 5. Cross-vein roadway; 6. Hanging wall bottom-pulling roadway; 7. Footing wall bottom-pulling roadway; 8. Hanging wall cutting riser; 9. Footing wall cutting riser; 10. Hanging wall bottom-pulling blast hole; 11. Footing wall bottom-pulling blast hole; 12. Hanging wall compensation space; 13. Footing wall compensation space; 14. Ore body blast hole; 15. Ore. Detailed Implementation

[0021] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0022] 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 this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0023] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more (including two), unless otherwise explicitly defined.

[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0026] This application provides a zigzag continuous mining and extraction process for extremely thin veins in metal mines. By dividing the upper and lower wall surrounding rocks 3 of the extremely thin vein into compensation spaces in a zigzag pattern, and then combining it with continuous mining blasting, the extremely thin vein is extracted and extracted, effectively reducing the loss and dilution of ore 15, and achieving safe, economical and efficient mining of extremely thin veins in metal mines.

[0027] Specifically, this application provides a zigzag continuous mining and extraction process for extremely thin veins in metal mines, comprising the following steps: Arrange the mining area and determine the mining sections; The vein-crossing tunnel 5 is constructed from the lower wall external connecting tunnel 4 of the mining section to the ore body 2. The vein-crossing tunnel 5 passes through the lower wall surrounding rock 3, the ore body 2, and the upper wall surrounding rock 1 in sequence. Taking the position where the cross-vein tunnel 5 passes through the upper surrounding rock 1 as the first starting point, the upper bottom tunnel 6 is constructed in the upper surrounding rock 1 along the first direction; taking the position where the cross-vein tunnel 5 passes through the lower surrounding rock 3 as the second starting point, the lower bottom tunnel 7 is constructed in the lower surrounding rock 3 along the second direction; the first direction and the second direction are opposite. In the upper plate bottom tunnel 6, the upper plate cutting ceiling 8 is constructed at the end away from the first starting point, and the upper plate bottom blast hole 10 is constructed near the upper plate cutting ceiling 8; in the lower plate bottom tunnel 7, the lower plate cutting ceiling 9 is constructed at the end away from the second starting point, and the lower plate bottom blast hole 11 is constructed near the lower plate cutting ceiling 9. The upper wall surrounding rock 1 and the lower wall surrounding rock 3 are blasted through the upper bottom blast hole 10 and the lower wall bottom blast hole 11 respectively, and the blasted waste rock is transported out of the mining area to form the upper wall compensation space 12 and the lower wall compensation space 13. Ore body blast holes 14 are constructed within ore body 2, and blasting is carried out using the upper wall compensation space 12 and the lower wall compensation space 13 as free faces. The blasted ore 15 is then transported out of the mining area, completing the separation of the mining sections.

[0028] In the technical solution of this application embodiment, a cross-cutting tunnel 5 is set up to pass through the footwall 3, ore body 2 and hanging wall 1 in sequence. Corresponding bottom-pulling tunnels are constructed in the cross-cutting tunnel 5 in a zigzag pattern into the hanging wall 1 and footwall 3 respectively. The cutting riser in the bottom-pulling tunnel is used as a compensation space to construct bottom-pulling blast holes, thereby realizing the blasting of part of the hanging wall 1 and footwall 3. After the blasted waste rock is transported out of the stope, a zigzag-shaped upper footwall compensation space 12 and lower footwall compensation space 13 are formed. The sufficient compensation space formed by the upper footwall compensation space 12 and lower footwall compensation space 13 can serve as a free surface to reduce the blasting clamping effect, so as to achieve safe and effective blasting of ore body 2, reduce the disturbance to the remaining surrounding rock, improve the safety of the stope operation, and further reduce the mixing of waste rock. The above-mentioned mining method provided in this application can fully recover the ore body 2 while minimizing the mixing of ore 15 with waste rock, effectively reducing the loss and dilution of ore 15, and realizing safe, economical and efficient mining of extremely thin veins in metal mines.

[0029] It can be explained that the separate mining and separation in this application refers to the separate mining of the surrounding rock and ore body 2, and the separate transportation of the waste rock and ore 15 obtained from the mining, so as to achieve effective separation of ore 15 and waste rock. This can not only achieve full mining of ore body 2 to avoid loss of ore 15, but also prevent a large amount of waste rock from being mixed into ore 15, thereby reducing the dilution of ore 15.

[0030] Furthermore, in some embodiments, arranging the mining area and determining the mining sections includes: The ore body 2 to be mined is divided into sections along the height direction. Within each section, a stope is arranged along the strike of the ore body 2, and mining is carried out between sections in a bottom-up order.

[0031] Furthermore, in some embodiments, the upper compensation space 12 and the lower compensation space 13 are used as free faces for blasting and mining, including: The ore body 2 near the upper compensation space 12 is divided into the first unit, and the ore body 2 near the lower compensation space 13 is divided into the second unit. The first and second units were blasted and mined in sequence, so that the first and second units would alternately drop ore into the hanging wall compensation space 12 and the footwall compensation space 13, respectively.

[0032] By using the above method, the continuous mining of ore body 2 can be achieved by using different units to intersect in a zigzag pattern, which effectively improves the production capacity of the mining area.

[0033] Furthermore, in some embodiments, after the mining of the longwall sections is completed, the process also includes stope filling and curing. After the curing is completed, the upper mining sections are further mined in a bottom-up order.

[0034] Using the above method, the entire mining operation can be completed by repeating the process of mining, filling, curing, and then mining the previous mining segment again.

[0035] Furthermore, in some embodiments, the tunnel dimensions of the through-vein tunnel 5 are 2m~3m×2m~3m.

[0036] Furthermore, in some embodiments, the upper cutting ceiling 8 and the lower cutting ceiling 9 are both 2m~3m×2m~3m in size.

[0037] Furthermore, in some embodiments, the row spacing of the upper hanging wall bottom blast holes 10 and the lower hanging wall bottom blast holes 11 is 0.8~1.2m, the hole spacing is 0.3~0.5m, and the hole depth is 8~10m; the row spacing of the ore body blast holes 14 is 0.3~0.5m, the hole spacing is 0.6~1.0m, and the hole depth is 8~10m; the upper hanging wall bottom blast holes 10, the lower hanging wall bottom blast holes 11, and the ore body blast holes 14 are all upward parallel blast holes.

[0038] More specifically, based on the separate mining process approved in this application, waste rock and ore 15 can be effectively separated. During mining, a medium-deep hole drilling rig can be used to construct the above-mentioned upper hanging bottom blast holes 10, lower hanging bottom blast holes 11 and ore body blast holes 14. Compared with the mechanical rock breaking or shallow hole blasting methods used in the mining of extremely thin veins, it has significantly higher mining efficiency.

[0039] Furthermore, in some embodiments, the thickness of ore body 2 is <0.8m.

[0040] The separate mining and recovery process provided in this application is suitable for extremely thin veins with a thickness of <0.8m. It can fully recover the ore body 2 while minimizing the mixing of ore 15 with waste rock, and has high recovery efficiency, showing good prospects for practical application.

[0041] The following is a specific embodiment. It should be noted that the embodiment described below is exemplary and is only used to explain this application, and should not be construed as limiting this application. Where specific techniques or conditions are not specified in the embodiment, they shall be performed in accordance with the techniques or conditions described in the literature in this field or in accordance with the product manual.

[0042] Example 1 This embodiment provides a zigzag continuous extraction and recovery process for extremely thin veins in metal mines, including the following steps: The ore body 2 to be mined is divided into sections along its height. Within each section, stopes are arranged along the strike of ore body 2, and mining is carried out between sections in a bottom-up sequence. First, the lowest mining section is separated and extracted. Then, this mining section is filled and cured. After the curing is completed, the mining of the previous mining section is repeated, and so on, to complete the mining operation of the entire stage.

[0043] The specific steps for separating and extracting each mining segment include: S1. A cross-cutting tunnel 5 is constructed from the footwall external connecting tunnel 4 of the mining section towards the ore body 2. This cross-cutting tunnel 5 passes sequentially through the footwall surrounding rock 3, the ore body 2, and the hanging wall surrounding rock 1. The corresponding structural diagram is shown below. Figure 1 , Figure 2 As shown.

[0044] S2. Taking the position where the tunnel 5 passes through the upper surrounding rock 1 as the first starting point, along the first direction (i.e., ... Figure 3 (From the center to the left) Construct the upper hanging wall bottom tunnel 6 (2.6m × 2.6m) within the upper hanging wall surrounding rock 1; Taking the position where the cross-cut tunnel 5 passes through the lower hanging wall surrounding rock 3 as the second starting point, along the second direction (i.e., Figure 3 (From the center to the right) Construct the lower footing tunnel 7 (2.6m × 2.6m) within the lower footing surrounding rock 3. For example... Figure 3 As shown, the upper pulley 6 and the lower pulley 7, together with the connecting pulley 5, form a zigzag-like structure.

[0045] S3. In the upper plate bottom-pulling tunnel 6, construct an upper plate cutting well 8 (2.6m × 2.6m) at the end furthest from the first starting point. Using the upper plate cutting well 8 as compensation space, construct upward parallel upper plate bottom-pulling blast holes 10 (blast hole row spacing of 1m, hole spacing of 0.4m, and hole depth of 9m) using a medium-deep hole drilling rig near the upper plate cutting well 8. In the lower plate bottom-pulling tunnel 7, construct a lower plate cutting well 9 (2.6m × 2.6m) at the end furthest from the second starting point. Using the lower plate cutting well 9 as compensation space, construct upward parallel lower plate bottom-pulling blast holes 11 (blast hole row spacing of 1m, hole spacing of 0.4m, and hole depth of 9m) near the lower plate cutting well 9.

[0046] S4. Charge explosives into the upper hanging wall bottom blast hole 10 and the lower hanging wall bottom blast hole 11, and detonate them respectively. Remove the debris from the upper hanging wall surrounding rock 1 and the lower hanging wall surrounding rock 3 after detonation from the mining area, forming the upper hanging wall compensation space 12 and the lower hanging wall compensation space 13. Figure 4 As shown.

[0047] S5, according to Figure 4The borehole arrangement shown involves constructing parallel boreholes 14 upwards within ore body 2 (bomb spacing of 0.4m, hole spacing of 0.8m, and hole depth of 9m). Ore body 2 adjacent to the hanging wall compensation space 12 is divided into the first unit, and ore body 2 adjacent to the footwall compensation space 13 is divided into the second unit. The first and second units are then sequentially blasted and mined, causing the ore to fall alternately into the hanging wall compensation space 12 and the footwall compensation space 13, respectively. The ore falling diagrams are shown below. Figure 5 , Figure 6 As shown, the blasted ore 15 is transported out of the mining area, completing the separation of the mining sections.

[0048] Through the above methods, this embodiment can minimize the mixing of ore 15 and waste rock while fully recovering the ore body 2, effectively reducing the loss and dilution of ore 15, and achieving safe, economical and efficient recovery of extremely thin veins in metal mines.

[0049] In summary, this application provides a zigzag continuous mining and separation process for extremely thin veins in metal mines, belonging to the field of mining technology for extremely thin veins in metal mines. This mining process includes: constructing a vein-crossing tunnel 5 that sequentially passes through the footwall 3, ore body 2, and hanging wall 1 in the mining sections; constructing bottom-pulling tunnels from the vein-crossing tunnel 5 into the hanging wall 1 and footwall 3 respectively, and constructing cutting risers and bottom-pulling blast holes in the bottom-pulling tunnels to blast the hanging wall 1 and footwall 3, and transporting the blasted waste rock out of the stope to form a footwall compensation space 12 and a footwall compensation space 13; constructing ore body blast holes 14 within the ore body 2, and blasting and mining from the free faces of the footwall compensation space 12 and footwall compensation space 13, thus completing the separation and separation of the mining sections. In this way, the upper and lower wall surrounding rocks 3 of the extremely thin ore vein are divided into compensation spaces in a zigzag pattern. Combined with continuous mining blasting, the extremely thin ore vein is separated and extracted, effectively reducing the loss and dilution of ore 15.

[0050] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A zigzag continuous mining and extraction process for extremely thin veins in metal mines, characterized in that, Includes the following steps: Arrange the mining area and determine the mining sections; A cross-vein tunnel is constructed from the footwall external connecting roadway of the mining section to the ore body, and the cross-vein tunnel passes through the footwall surrounding rock, the ore body and the hanging wall surrounding rock in sequence. Taking the location where the cross-vein tunnel passes through the upper wall surrounding rock as the first starting point, an upper wall bottom tunnel is constructed within the upper wall surrounding rock along a first direction; taking the location where the cross-vein tunnel passes through the lower wall surrounding rock as the second starting point, a lower wall bottom tunnel is constructed within the lower wall surrounding rock along a second direction; the first direction and the second direction are opposite. In the upper plate bottom-pulling tunnel, an upper plate cutting ceiling is constructed at the end furthest from the first starting point, and upper plate bottom-pulling blast holes are constructed near the upper plate cutting ceiling; in the lower plate bottom-pulling tunnel, a lower plate cutting ceiling is constructed at the end furthest from the second starting point, and lower plate bottom-pulling blast holes are constructed near the lower plate cutting ceiling. The upper and lower wall surrounding rocks are blasted through the upper and lower wall bottom blast holes respectively, and the blasted waste rock is transported out of the mining area to form upper and lower wall compensation spaces. Ore blasting holes are constructed within the ore body, and blasting is carried out using the upper and lower footwall compensation spaces as free faces. The blasted ore is then transported out of the mining area, completing the separation of the mining sections.

2. The zigzag continuous mining and extraction process for extremely thin veins in metal mines according to claim 1, characterized in that, The arrangement of the mining area and the determination of the mining sections include: The ore body to be mined is divided into sections along the height direction, and the mining area is arranged along the strike of the ore body within each section. The mining between each section is carried out in a bottom-up order.

3. The zigzag continuous mining and extraction process for extremely thin veins in metal mines according to claim 1, characterized in that, Blasting and mining are carried out using the upper and lower compensation spaces as free faces, including: The ore body near the upper compensation space is divided into the first unit, and the ore body near the lower compensation space is divided into the second unit. The first unit and the second unit are blasted and mined in sequence, so that the first unit and the second unit fall ore into the upper compensation space and the lower compensation space in an alternating manner.

4. The zigzag continuous mining and extraction process for extremely thin veins in metal mines according to claim 1, characterized in that, After the mining of the aforementioned longwall sections is completed, the process also includes stope backfilling and curing. After the curing is completed, the upper longwall sections are mined in a bottom-up order.

5. The zigzag continuous mining and extraction process for extremely thin veins in metal mines according to claim 1, characterized in that, The dimensions of the tunnel are 2m~3m×2m~3m.

6. The zigzag continuous mining and extraction process for extremely thin veins in metal mines according to claim 1, characterized in that, The specifications of both the upper and lower cutting ceilings are 2m~3m×2m~3m.

7. The zigzag continuous mining and extraction process for extremely thin veins in metal mines according to claim 1, characterized in that, The row spacing of the upper and lower bottom-pull blast holes is 0.8~1.2m, the hole spacing is 0.3~0.5m, and the hole depth is 8~10m.

8. The zigzag continuous mining and extraction process for extremely thin veins in metal mines according to claim 1, characterized in that, The spacing between the rows of boreholes in the ore body is 0.3~0.5m, the spacing between holes is 0.6~1.0m, and the depth of the holes is 8~10m.

9. The zigzag continuous mining and extraction process for extremely thin veins in metal mines according to claim 1, characterized in that, The upper plate bottom blast holes, the lower plate bottom blast holes, and the ore body blast holes are all upward parallel blast holes.

10. The zigzag continuous mining and extraction process for extremely thin veins in metal mines according to claim 1, characterized in that, The thickness of the ore body is <0.8m.

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