A step-by-step efficient continuous mining method for thin ore vein groups

Abstract

The present invention relates to the technical field of underground mining methods, and proposes a step-by-step efficient and continuous recovery method for a thin ore vein group, which is used to collect ore bodies in a ore block, wherein the ore block has at least two ore bodies, the ore bodies are arranged vertically, and there is a rock layer between adjacent ore bodies, and the first ore body, the rock layer, and the second ore body in the ore block are arranged in sequence, including the following steps: S10, mining the first ore body to form a first goaf; S20, partially blasting the rock layer, and filling the first goaf with the crushed stones obtained by the blasting; S30, mining the second ore body. Through the above technical solution, the problems of low efficiency in mining steeply inclined thin ore veins containing multiple layers of rock and difficulty in applying large-scale automated machinery and equipment in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of underground mining methods, and in particular to a step-by-step efficient and continuous recovery method for a group of thin ore veins. Background Art

[0002] Thin ore veins usually refer to ore bodies with a thickness of less than 5 m. Based on the mining experience of gold, uranium and other mines at home and abroad, thin ore veins are mostly mined using three mining methods: medium-deep hole segmented open field method, shallow hole ore retention method and wall cutting and filling method. However, the mineralization environment of thin ore veins is complex and the morphology is ever-changing. The ore bodies are mostly produced in the form of "vein groups", and it is common for vein groups / groups to contain multiple layers of intercalated stones. At this time, the mechanical application of a certain mining method according to the thickness of the ore body is no longer feasible. There are disadvantages such as low production efficiency, high ore depletion and mixing rate, and large mining and cutting ratio, which makes it difficult to meet the needs of continuous and efficient resource recovery. Therefore, it is necessary to flexibly design the coordinated recovery steps of ore veins and intercalated stones according to the ore body morphology, and develop an efficient and continuous recovery method without waste rock leaving the mining site. Summary of the invention

[0003] The present invention proposes a step-by-step efficient and continuous recovery method for a group of thin ore veins, which solves the problems in the related art of low mining efficiency of steeply inclined thin ore veins containing multiple layers of intercalated stones and difficulty in applying large-scale automated mechanical equipment.

[0004] The technical solution of the present invention is as follows: a method for step-by-step efficient continuous recovery of thin ore vein groups, which is used to collect ore bodies in a ore block, wherein the ore block has at least two ore bodies, the ore bodies are arranged vertically, and there is a stone layer between adjacent ore bodies, and the first ore body, the stone layer, and the second ore body in the ore block are arranged in sequence, comprising the following steps:

[0005] S10, mining the first ore body to form a first goaf;

[0006] S20, partially blasting the interlayer, and filling the first goaf with the crushed stones obtained by the blasting;

[0007] S30, mining the second ore body.

[0008] Optionally, in S30, after mining the second ore body, a second goaf is obtained, and after S30, the following steps are further included:

[0009] S40, looping through S20 and S30 to complete the mining of the ore block;

[0010] S50, filling all the unfilled parts of the first goaf, the unblasted parts of the rock-interlayer, and the second goaf.

[0011] Optionally, in S10, the ore body is arranged vertically and inclined with a dip angle, and before S10, the method further includes:

[0012] S02, horizontal excavation of segmented rock drilling tunnels along thin ore vein groups;

[0013] Among them, in said S20, the partial blasting of the rock layer is specifically to construct upward blastholes and downward blastholes in the rock layer along the inclination in the segmented rock drilling tunnel, so that the broken rocks collapsed by blasting fall into the first goaf.

[0014] Optionally, in S20, the height of the crushed rocks filled in the first goaf is lower than or equal to the height of the unblasted interlayer, and the height difference is less than 4 m.

[0015] Optionally, after S02, the step further includes:

[0016] S03, excavating a cutting shaft in the middle of the ore block along the inclination of the ore body;

[0017] Wherein, the S10 specifically comprises mining the first ore body from the cutting shaft to both sides;

[0018] Specifically, S20 includes blasting the rock layer from the cutting shaft to both sides, and filling the first goaf with the crushed stones obtained by the blasting;

[0019] Specifically, S30 includes mining the second ore body from the cutting shaft to both sides.

[0020] Optionally, S02 specifically includes excavating a segmented rock drilling tunnel horizontally along the ore body, and excavating a bottom tunnel horizontally along the ore body at the bottom of the ore block;

[0021] The S03 specifically involves excavating a cutting shaft in the middle of the ore block along the inclination of the ore body, brushing and expanding the cutting shaft to the boundary of the ore body to form a free surface for blasting and dropping the ore, and brushing and expanding the bottom tunnel to the boundary of the ore body to form another free surface for blasting and dropping the ore.

[0022] Optionally, between S40 and S50, the following steps are further included:

[0023] S41, constructing a downwardly directed upward hole in sections along the inclination angle through the bottom pulling tunnel; constructing a downwardly directed hole in sections downwardly and an upwardly directed hole in sections upwardly along the inclination angle through the segmented rock drilling tunnel.

[0024] Optionally, before S02, the step further includes:

[0025] S01. According to the shape of the ore vein, the mining area is arranged along the direction of the ore body, and the top pillar and intermediate pillar are reserved.

[0026] Optionally, S02 specifically comprises: excavating an off-vein transport lane; constructing a vein-penetrating lane from the off-vein transport lane to the ore body level; excavating a pedestrian ventilation shaft upward in the intermediate pillar along the inclination of the ore body; excavating the segmented rock drilling lane along the ore body level; excavating a bottom lane along the ore body level at the bottom of the ore block; excavating a mine exit route from the off-vein transport lane to the bottom lane; excavating a mining ramp upward from the off-vein transport lane to the ore body segment level; excavating a segmented horizontal lane along the ore body direction; excavating a segmented rock drilling connecting lane from the segmented horizontal lane perpendicular to the ore body level to the segmented rock drilling lane; excavating a small filling well downward through the top pillar on the upper stage mine exit route.

[0027] Optionally, in S02, the segmented rock drilling tunnels are excavated horizontally along the ore body, specifically, the segmented rock drilling tunnels divide the ore block into a lower segment and an upper segment in a vertical direction, wherein the vertical height of the lower segment is twice the vertical height of the upper segment.

[0028] The working principle and beneficial effects of the present invention are:

[0029] In the present invention, by mining the first ore body, the interlayered rock layer and the second ore body in steps, the mixing of ore and the interlayered rock layer can be effectively avoided, and the purity and recovery rate of the ore are improved. The first ore body is first mined to form the first goaf, and then the interlayered rock layer is partially blasted and the crushed stone is filled into the first goaf, and finally the second ore body is mined. This step-by-step mining sequence enables each step to be carried out independently, thereby improving the mining efficiency. By partially blasting the interlayered rock layer and filling it into the first goaf, the mixing of the interlayered rock layer and the ore can be effectively reduced, the ore depletion phenomenon is avoided, and the quality of the ore is improved. Before mining the second ore body, the interlayered rock layer is partially blasted and filled into the first goaf, which can reduce the roof pressure during the mining of the second ore body and improve the safety of the operation. By filling the crushed stone of the interlayered rock layer into the first goaf, the risk of collapse of the first goaf can be reduced, and the stability of the goaf can be enhanced. By filling the crushed stone of the interlayered rock layer into the first goaf, the space of the first goaf is reasonably utilized, the use of additional filling materials is avoided, and the filling cost is reduced. Through the step-by-step efficient continuous mining method, the entire mining process is made more orderly, ensuring the continuity between ore bodies, reducing faults caused by interlayers, and improving the overall coherence of the ore body. Through the implementation of the above features, the mining efficiency and safety of thin vein groups can be significantly improved, ore depletion can be reduced, space utilization can be optimized, mining costs can be reduced, and environmental benefits can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0031] Figure 1 It is a schematic diagram of the structure of the present invention;

[0032] Figure 2 It is a side view structural schematic diagram of the present invention;

[0033] Figure 3 It is a schematic diagram of the top view structure of the present invention;

[0034] Figure 4 A schematic diagram of the structure of the ore block of the present invention;

[0035] Figure 5 for Figure 4 Schematic diagram of the structure of the first ore body M1 after mining;

[0036] Figure 6 for Figure 5 Schematic diagram of the structure of the middle interlayer after JS blasting;

[0037] Figure 7 for Figure 6 Schematic diagram of the structure of the second ore body M2 after mining;

[0038] Figure 8 for Figure 7 Schematic diagram of the structure after filling;

[0039] Fig. 9 Another structural schematic diagram of the ore block of the present invention.

[0040] In the figure: 1. Vein-crossing tunnel; 2. Bottom-pulling tunnel; 3. Mine exit route; 4. Lower segment upward hole; 5. Lower segment downward hole; 6. Cutting skylight; 7. Pedestrian ventilation skylight; 8. Segmented rock drilling tunnel; 9. Segmented rock drilling connecting tunnel; 10. Upper segment upward hole; 11. Intermediate pillar; 12. Top pillar; 13. Filling small shaft; 14. Upper segment mine exit route; 15. Off-vein transport tunnel; 16. Mining ramp; 17. Segmented horizontal tunnel; K1, first goaf; K2, second goaf; M1, first ore body; M2, second ore body; M3, third ore body; JS, interlayer; JS2, second interlayer; L1, lower segment height; L2, upper segment height; L3, top pillar height; L4, horizontal length of ore body. DETAILED DESCRIPTION

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0042] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0043] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0045] Example 1

[0046] Reference Figure 1 to Figure 8 , a method for continuous and efficient recovery of thin ore vein groups in steps is proposed, which specifically includes the following steps:

[0047] S01: According to the shape of the ore vein, the mining area is arranged along the direction of the ore body, and the top pillar 12 and the intermediate pillar 11 are reserved; the expansion coefficient of rock is generally 1.4~1.5, without units, which generally means that after 1 cubic meter of rock is blasted, the accumulated volume is 1.4~1.5 cubic meters.

[0048] In this step, the stope is arranged along the strike of the ore body, with a length of 50-80 m, a height of 50-60 m, and a width equal to the horizontal thickness of the thin vein group. This layout can make full use of the spatial distribution characteristics of the ore body and reduce unnecessary mining workload. The reserved top pillar 11 is 3-6 m high and the intermediate pillar 10 is 3-6 m wide, which helps to improve the overall stability of the stope, reduce the risk of roof collapse, and ensure the safety of the operators. The design of the segmented rock drilling tunnel 8 divides the ore body into two segments, and the upper segment height is about 0.5 higher than the lower segment height. The purpose is to arrange three sections of blastholes in the vertical direction of the ore body to make the blasthole arrangement more reasonable, especially the deflection of the end blasthole is effectively controlled, thereby shortening the depth of the downward blasthole, making rock drilling and slag discharge easier, and improving rock drilling efficiency. As a preferred option, a flat-bottomed mining structure of a shovel loader can be used, which can not only speed up the mining speed, but also reduce the loss of ore during transportation and improve the ore recovery rate.

[0049] S02: Excavate the outer-vein transport tunnel 15; construct the vein tunnel 1 from the outer-vein transport tunnel 15 to the ore body horizontally; excavate the pedestrian ventilation shaft 7 upwards in the intermediate pillar 11 along the inclination of the ore body; dig the segmented rock drilling tunnel 8 along the ore body horizontally; excavate the bottom tunnel 2 at the bottom of the ore block along the ore body horizontally; excavate the mine exit route 3 to the bottom tunnel 2 in the outer-vein transport tunnel 15; excavate the mining ramp 16 upwards from the outer-vein transport tunnel 15 to the ore body segment level; excavate the segmented horizontal tunnel 17 along the ore body direction; excavate the segmented rock drilling connecting tunnel 9 from the segmented horizontal tunnel 17 vertically to the ore body horizontally to the segmented rock drilling tunnel 8; excavate the filling small shaft 13 downwards through the top pillar 12 at the upper stage mine exit route 14.

[0050] In this step, an off-vein transport tunnel 15 is excavated along the direction of the ore body at a horizontal distance of 8 to 12 m from the ore body, which can provide a convenient passage for subsequent mining operations, reduce transportation time and cost, quickly establish connections between the inside and outside of the ore body, and facilitate the entry and exit of equipment and personnel. The vein tunnel 1 is constructed horizontally from the off-vein transport tunnel 15 to the ore body. After the vein tunnel 1 is constructed to the bottom of the ore body, a pedestrian ventilation skylight 7 is constructed in the intermediate pillar 11 using a one-time well-forming blasting technology along the inclination of the ore body. The use of a one-time well-forming blasting technology to construct a pedestrian ventilation skylight can effectively establish a ventilation system inside the ore body, improve the working environment, and improve the safety of operations. At the same time, the skylight serves as a pedestrian passage, which facilitates the movement of workers between different levels and improves work efficiency. After the pedestrian ventilation shaft 7 is excavated to the level of the ore body segment, the segmented rock drilling tunnel 8 is excavated along the ore body level; the bottom tunnel 2 is excavated along the ore body level at the bottom of the ore block, and the segmented rock drilling tunnel and bottom tunnel are excavated along the ore body level, which can simplify the mining process and make the mining of ore more orderly. This layout reduces unnecessary duplication of work and improves the overall mining efficiency; in the off-vein transport tunnel 15, the mine access 3 is excavated to the bottom tunnel 2 at the bottom of the ore body every 8 to 15 meters, which can ensure that the ore is transported to the surface in time, reduce the possibility of ore being stranded in the mining area, and thus improve the recovery rate of the ore; then the mining ramp 16 is excavated upward from the off-vein transport tunnel 15 to the level of the ore body segment, and then the segmented horizontal tunnel 17 is excavated along the direction of the ore body, to build an efficient ore transportation network. This design makes the transportation of ore from the mining area to the surface smoother, reduces the loss in the transportation link, and excavates the segmented rock drilling connecting tunnel 9 from the segmented horizontal tunnel 17 to the ore body to connect the segmented rock drilling tunnel 8; in the upper stage, the mine access 14 is excavated downward through the top column 12 to dig the filling well 13, which provides a direct path for the transportation of filling materials. This not only simplifies the filling process, but also improves the efficiency of the filling operation, which helps to maintain the stability of the goaf. It is worth noting that the steps mentioned in S02 are not in order. In actual engineering, they can be executed in this order, but they can also be executed in a different order. That is, this construction order is not unique and needs to be carried out according to actual conditions.

[0051] S03: excavate a cutting shaft 6 in the middle of the ore block along the inclination of the ore body, expand the cutting shaft 6 to the boundary of the ore body to form a free surface for blasting and dropping the ore, and expand the bottom tunnel 2 to the boundary of the ore body to form another free surface for blasting and dropping the ore.

[0052] In this step, a cutting shaft 6 is excavated along the inclination of the ore body in the middle of the ore block using a single well-forming deep hole blasting technology, and the cutting shaft 6 is expanded to the boundary of the ore body to form a free surface for blasting and dropping ore; the bottom lane 2 is expanded to the boundary of the ore body to form another free surface for blasting and dropping ore. A good detonation point is provided for subsequent blasting operations, making the blasting effect more ideal, and the ore is more easily loosened and falls into the predetermined area. After the free surface is formed, the energy generated during the blasting can act more concentratedly on the ore, rather than being absorbed or dispersed by the surrounding rocks, thereby improving the blasting efficiency. This means that more ore can be released each time the blasting is performed, reducing the number of blasting times required, saving resources such as explosives, and by accurately controlling the free surface of the blasting and dropping ore, the mixing of ore and surrounding rock can be reduced, and the ore depletion rate can be reduced.

[0053] S04: construct a lower segmented upward hole 4 along the inclination of the second ore body M2 through the bottom pulling tunnel 2; construct a lower segmented downward hole 5 downward along the inclination of the second ore body M2 and construct an upper segmented upward hole 10 upward through the segmented rock drilling tunnel 8.

[0054] In this step, by constructing the up-down holes along the inclination of the second ore body M2, it can be ensured that the blasting hole arrangement is more reasonable, so that the blasting energy can act on the ore body more effectively, and the blasting efficiency is improved. The reasonable arrangement of the up-down holes can better control the ore distribution after blasting, so that the ore can collapse more evenly, reduce the mixing of ore and stone, and improve the purity of the ore. By accurately controlling the position and direction of the blasting hole, the mixing of ore and stone can be reduced, the ore depletion rate is reduced, and the quality of the ore is improved. The construction of the up-down holes can better control the stability of the ore body during the blasting process, reduce the risk of roof collapse caused by improper blasting, and improve the safety of the operation. Through the arrangement of the up-down holes, it can be ensured that the ore can fall more evenly into the bottom lane after blasting, which is convenient for subsequent collection and transportation, reduces the difficulty of subsequent processing, and improves the operating efficiency and the recovery rate of the ore. The arrangement of the up-down holes provides a better working surface for subsequent rock drilling and blasting, makes the operation of the operator more convenient, and also creates favorable conditions for the use of mechanical equipment. The arrangement of the up and down holes ensures that the ore can fall smoothly into the bottom tunnel after blasting, which is convenient for subsequent collection and transportation and simplifies the process of subsequent operations. The reasonable hole arrangement reduces the stability of the ore body caused by improper blasting, reduces the subsequent maintenance costs, and extends the service life of the mine. By reducing the mixing of ore and interlayer stone, the generation of waste rock is reduced, and the impact on the environment is reduced.

[0055] S10: Mining is carried out from the cutting shaft 6 to the pillars 10 on both sides of the M1 vein. When the mining of the M1 vein is completed, the goaf is not filled temporarily to leave space for blasting and stripping the interlayer JS.

[0056] In this step, by first mining the M1 ore vein to the intermediate pillar, it can ensure that the ore in the ore body is fully recovered, reduce the loss of ore, and improve the recovery rate of ore. Not filling the goaf temporarily can make full use of the space for subsequent blasting operations, making the entire operation process more orderly, reducing unnecessary duplication of work, and improving operation efficiency.

[0057] S20: The stripping of the interlayer JS is based on the expansion coefficient of the interlayer, the amount of interlayer, and the size of the goaf space formed after the first ore body M1 is mined. After calculation, in the segmented rock drilling tunnel 8, upward blastholes and downward blastholes are constructed in the interlayer JS along the inclination, but the drilling holes are not constructed in the entire section, and construction is only carried out in the middle and upper sections of the interlayer JS; the interlayer JS is partially blasted from both sides of the cutting shaft 6, so that the height of the crushed stones collapsed in the goaf K1 by blasting is lower than or equal to the height of the interlayer JS before rock drilling and blasting. Assuming that the height of the residual interlayer JS before rock drilling and blasting is h, the height of the crushed stones collapsed in the goaf K1 by blasting is in the range of h-4~h. The purpose of blasting the interlayer JS is to partially peel off the interlayer adjacent to the second ore body M2, leaving operating space for the mining of the second ore body M2 and improving the blasting mining efficiency of the second ore body M2. The lower interlayer JS that has not been drilled and blasted becomes a natural barrier to isolate waste rock and ore.

[0058] In this step, the height of the crushed rocks caused by blasting is precisely controlled to be in the range of h-4~h, ensuring that the remaining part of the interlayer without rock blasting becomes a natural barrier between waste rock and ore, reducing the depletion of the ore and improving the quality of the ore.

[0059] S30: Mining from the cutting shaft 6 to both sides of the second ore body M2 to the intermediate pillars 10.

[0060] S50: After the mining of the second ore body M2 is completed, all empty areas are filled with waste rock filling, cement filling, or waste rock or cementitious materials to improve the stability of the surrounding rock.

[0061] Example 2

[0062] refer to Fig. 9 , which is different from Example 1, the ore block in Example 1 is composed of two ore bodies (the first ore body M1 and the second ore body M2) and a rock layer JS therebetween. In this embodiment, the collection steps when there are more than two ore bodies in a ore block are proposed. Taking an ore block having three ore bodies and two rock layers as an example, that is, also including the second rock layer JS2 and the third ore body M3, the collection steps for a single ore block are:

[0063] S10, mining the first ore body M1 to form a first goaf K1;

[0064] S20, partially blasting the first rock layer JS, and filling the first goaf K1 with the crushed stones obtained by the blasting;

[0065] S30, mining the second ore body M2 to form a second goaf K2;

[0066] S31, partially blasting the second rock layer JS2, and filling the second goaf K2 with the crushed stones obtained by the blasting;

[0067] S32, mining the third ore body M3 to form the third goaf K3;

[0068] S33, fill the unfilled part of the first goaf K1, the unblasted part of the rock layer JS, the second goaf K2, the unblasted part of the rock layer JS2, and the third goaf K3.

[0069] When the number of ore bodies and interlayers is greater than three, refer to Example 2 to complete the mining of the ore block.

[0070] In the above embodiments, unless otherwise specified, the numerical value following S represents the order of implementation.

[0071] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for efficient continuous recovery of thin ore vein groups in steps, for collecting ore bodies in a ore block, wherein the ore block has at least two ore bodies, the ore bodies are arranged vertically, and there is a rock layer between adjacent ore bodies, characterized in that: The first ore body (M1), the interlayer (JS), and the second ore body (M2) in the ore block are arranged in sequence, comprising the following steps: S10, mining the first ore body (M1) to form the first goaf (K1); S20, partially blasting the rock layer (JS), and filling the first goaf (K1) with the crushed rocks obtained by the blasting; S30, mining the second ore body (M2); In the S30, after the second ore body (M2) is mined, a second goaf (K2) is obtained, and after the S30, the following steps are further included: S50, filling all the unfilled parts of the first goaf (K1), the blasted parts of the rock layer (JS) and the second goaf (K2); The ore block includes at least three ore bodies, and there is an interlayer of rocks between adjacent ore bodies, and before S50, the method further includes: S40, based on the execution of S10 to S30, cyclically executing S20 and S30; In the S10, the ore body is arranged vertically and inclined, and has a dip angle, and before the S10, the following steps are further included: S02, horizontal excavation of segmented rock drilling tunnels along thin ore vein groups (8); Partial blasting of the rock layer (JS) in S20 specifically includes constructing upward blastholes and downward blastholes in the rock layer (JS) along the inclination angle in the segmented rock drilling tunnel (8), so that the broken rocks caused by blasting fall into the first goaf (K1); In S02, the step of horizontally excavating the segmented rock drilling tunnel (8) along the ore body specifically comprises that the segmented rock drilling tunnel (8) divides the ore block into a lower segment and an upper segment along the vertical direction, wherein the vertical height of the lower segment is twice the vertical height of the upper segment; In the S20, the height of the crushed rocks filled in the first goaf (K1) is specifically lower than or equal to the height of the unblasted interlayer (JS), and the height difference is less than 4m.

2. A method for efficient continuous recovery of thin ore vein groups according to claim 1, characterized in that: The S02 also includes: S03, excavating a cutting shaft (6) in the middle of the ore block along the inclination of the ore body; The step S10 specifically comprises mining the first ore body (M1) from the cutting shaft (6) to both sides; Specifically, the step S20 comprises constructing an upward blasthole and a downward blasthole in the interlayer (JS) along the inclination in the segmented rock drilling tunnel (8), blasting a portion of the interlayer (JS) from both sides through the cutting shaft (6), and filling the first goaf (K1) with the crushed rocks obtained by the blasting; Specifically, the S30 includes mining the second ore body (M2) from the cutting shaft (6) to both sides.

3. A method for efficient continuous recovery of thin ore vein groups according to claim 2, characterized in that: Specifically, S02 includes excavating a segmented rock drilling tunnel (8) horizontally along the ore body, and excavating a bottom tunnel (2) horizontally along the ore body at the bottom of the ore block; Specifically, S03 comprises excavating a cutting shaft (6) in the middle of the ore block along the inclination of the ore body, expanding the cutting shaft (6) to the boundary of the ore body to form a free surface for blasting and dropping the ore, and expanding the bottom tunnel (2) to the boundary of the ore body to form another free surface for blasting and dropping the ore.

4. A method for efficient continuous recovery of thin ore vein groups according to claim 3, characterized in that: Before S10 and after S02, the following further includes: S04, constructing a lower segmented upward hole (4) along the inclination through the bottom pulling tunnel (2), constructing a lower segmented downward hole (5) downward along the inclination through the segmented rock drilling tunnel (8), and constructing an upper segmented upward hole (10) upward.

5. A method for efficient continuous recovery of thin ore vein groups according to claim 4, characterized in that: The S02 also includes: S01. According to the shape of the ore vein, the stope is arranged along the strike of the ore body, and a top pillar (12) and intermediate pillars (11) are reserved; The S02 is specifically: Excavating the outer transport tunnel (15); Constructing a through-vein tunnel (1) from the outer-vein transport tunnel (15) toward the ore body horizontally; Digging a pedestrian ventilation shaft (7) upwards in the intermediate pillar (11) along the inclination of the ore body; Excavating the segmented rock drilling tunnel (8) horizontally along the ore body; Excavating a bottom tunnel (2) horizontally along the ore body at the bottom of the ore block; Excavating a mine access road (3) in the outer-vein transport tunnel (15) to the bottom tunnel (2); Excavating a mining ramp (16) upward from the outer-vein transport tunnel (15) to the ore body segment level; Excavating a segmented drift (17) along the strike of the ore body; From the segmented horizontal tunnel (17) vertically to the ore body, a segmented rock drilling connecting tunnel (9) is excavated horizontally to the segmented rock drilling tunnel (8); In the upper stage, the mine access road (14) is excavated downward through the top pillar (12) to fill the small well (13).

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