A method for coordinated mining of residual ore side wing cluster holes and reconstruction of bottom structure

Abstract

This application provides a method for the coordinated mining of residual ore with clustered blast holes on the flanks and the reconstruction of the bottom structure. The method involves dividing and arranging ore blocks perpendicular to the strike of the ore body; arranging ore extraction roadways and ore extraction entrances; excavating ventilation and pedestrian shafts upwards within the transport roadways on both sides of the ore blocks; excavating drilling chambers from the ventilation and pedestrian shafts towards the ore blocks to be mined; reconstructing a trench-type ore-gathering bottom structure connected to the goaf in the lower part of the goaf; and drilling clustered blast holes into the ore blocks from within the drilling chambers at both ends of the ore blocks to recover the lower part of the residual ore. The goaf is a free face. Clustered blast holes are drilled in stages from bottom to top to break down the residual ore above the goaf and extract it. The above operation is repeated to complete the rock drilling, blasting, and ore extraction operations in stages until all the residual ore above the goaf of the ore block is mined out. Then, the next ore block is moved to continue mining. This invention achieves safe and efficient mining of the residual ore above the goaf by optimizing the ore block layout, reconstructing the trench-type bottom mining structure, and adopting a staged caving process with clustered blast holes on the flanks.

Description

Technical Field

[0001] This invention relates to the field of underground mining of metal mines, and in particular to a method for the coordinated mining of residual ore flanking cluster-shaped blast hole collapse and bottom structure reconstruction. Background Technology

[0002] During long-term mining operations, due to multiple factors such as early mining planning, mining technology, complex geological conditions, and limited construction techniques, large numbers of irregular, large-span abandoned goafs are easily formed in the middle and deep sections of the mine. These goafs, along with surrounding areas, retain a significant amount of residual ore, isolation pillars, and unmined ore bodies. These residual ore reserves are considerable; directly abandoning them would result in a serious waste of mineral resources, significantly reducing the mine's recovery and utilization rates. Furthermore, the large abandoned goafs, being in a suspended state for extended periods, are prone to roof collapses, rock spalling, and sudden increases in ground pressure, posing a serious threat to safe underground mining operations.

[0003] Currently, the main method for recovering residual ore above goaf is conventional medium-deep hole caving mining. This method involves setting up working roadways in the lower part of the goaf, using medium-deep hole blasting to cavate the upper residual ore, and relying on the existing roadways to complete ore transfer, thereby realizing the recovery and utilization of the residual ore in the goaf. This method has a simple structure and is convenient to construct, but it also has obvious defects, mainly manifested in poor operational safety, poor stability of the bottom ore extraction structure, low operational efficiency, single mining process, weak construction targeting, and serious waste of resources.

[0004] In mining areas with steeply thick ore bodies, traditional mining methods require extensive roof exposure, resulting in workers being exposed to unstable roof conditions for extended periods, significantly increasing safety risks. Furthermore, constrained by early beneficiation technologies and economic conditions, mines only exploited high-grade, rich ore, leaving large quantities of low-grade, lean ore abandoned in goaf areas, forming residual ore resources. The spatial conditions of residual ore in goaf areas are complex, making recovery difficult and risky using conventional mining methods. Since minerals are non-renewable resources, the long-term abandonment of residual ore leads to serious waste. With advancements in mining technology and beneficiation processes, previously unexploited residual ore now possesses exploitable value. To fully tap the potential of residual ore resources and achieve safe and efficient recovery, it is urgent to address the technological adaptability of residual ore recovery in complex goaf environments and the synergistic utilization of the bottom structure. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a method for the coordinated mining of residual ore by lateral cluster-shaped blast hole collapse and bottom structure reconstruction. By optimizing the ore block layout, reconstructing the trench-type bottom ore extraction structure, and adopting a lateral cluster-shaped blast hole staged collapse process, this invention solves the technical problems of safe and efficient mining of residual ore in the upper part of the goaf.

[0006] To achieve the above objectives, the technical solution adopted by this invention is as follows: A method for coordinated mining of residual ore with flanking cluster-shaped borehole collapse and bottom structure reconstruction includes the following steps: S1: Mineral block planning and mining parameters layout, dividing and arranging mineral blocks perpendicular to the ore body strike; S2: Construction of the mining preparation project, with mining level roadways arranged on both sides along the length of the ore block, and mining access roadways arranged inclined from the mining level roadways towards the center of the bottom of the ore body, the mining access roadways and mining level roadways connected; ventilation and pedestrian shafts are excavated upward in the transport roadways on both sides of the ore block to connect the upper and middle sections; rock drilling chambers are excavated from the ventilation and pedestrian shafts to both ends of the ore block to be mined; S3: Construction of ore collection trench, which involves reconstructing a trench-type ore collection bottom structure that connects with the goaf in the lower part of the goaf. S4: The ore body is mined by blasting in stages. In the drilling chambers at both ends of the ore block, down-the-hole drills are used to drill cluster-shaped blast holes into the ore block. The vertical height of the cluster-shaped blast holes is the vertical distance between the two drilling chambers. Using the goaf below the residual ore as the free face, the cluster-shaped blast holes are blasted in stages from bottom to top to break off the residual ore above the goaf. The broken ore is then extracted by a loader at the bottom of the trench. The above operation is repeated to complete the drilling, blasting, and extraction of the ore body in stages until all the residual ore above the goaf of this ore block is mined out. Then, the mining of the next ore block continues.

[0007] In the technical solution of this application, by drilling clustered blast holes on the flank of the mining area to stratify the ore body and reconstruct the bottom structure, the danger of personnel being exposed to working under the goaf is eliminated, the inherent safety of mining operations is improved, and at the same time, the ore recovery rate and resource utilization rate are effectively increased, providing a reliable technical solution for the safe and secure mining of residual ore bodies under complex conditions.

[0008] As a further improvement of the present invention, the width of the ore block is 20m, and the length of the ore block is not less than the maximum span of the existing goaf below, and is greater than the width of the ore block.

[0009] As a further improvement of the present invention, the height of the ore block is 48-52m, and the upper part of the ore body in the goaf is arranged in segments with a segment height of 15-20m.

[0010] In the technical solution of this application, the length of the ore block matches the complete span of the goaf, and the bidirectional clustered blast holes at both ends fully cover the collapsed ore body, leaving no large amount of residual ore, which significantly improves the recovery rate of residual ore and the utilization rate of mineral resources in the goaf.

[0011] As a further improvement of the present invention, S3 specifically involves: excavating a cutting riser and a cutting cross passage at one end of the bottom of the ore block, with the cutting cross passage connecting to the cutting riser to serve as the drilling space for the blasting cutting groove; constructing a trench level passage along the bottom of the ore block, with the trench level passage penetrating the bottom area of ​​the ore block; drilling upward parallel medium-deep holes in the cutting cross passage and blasting to form a cutting groove; drilling upward fan-shaped medium-deep holes in the trench level passage and blasting with the cutting groove as the free surface to form a ore-gathering trench, which also connects to the goaf.

[0012] In the technical solution of this application, the bottom structure relies on the reconstruction of the existing middle section roadway, eliminating the need for large-scale construction of new bottom roadways, reducing the amount of preparation work, and lowering the overall mining cost.

[0013] As a further improvement of the present invention, the cross-sectional dimensions of the cutting well and the cutting cross passage are 3.0×3.0m.

[0014] As a further improvement of the present invention, the vertical distance between the upper and lower rock drilling chambers is half the segment height.

[0015] As a further improvement of the present invention, after all the residual ore in the block has been mined, the empty area is subsequently filled.

[0016] As a further improvement of the present invention, during blasting mining operations, mining operations are carried out simultaneously on two adjacent ore blocks.

[0017] In the technical solution of this application, adjacent ore blocks are mined simultaneously, thereby improving mining efficiency.

[0018] As a further improvement of the present invention, the ventilation pedestrian well serves as the main passage for construction personnel to reach the segmented roadways and ventilation. The specifications of the ventilation pedestrian well meet the passage requirements of personnel and rock drilling equipment, and the roadway specifications are 2.0×1.5m.

[0019] As a further improvement of the present invention, the loader transfers the blasted ore in the ore collection trench to the ore exit roadway; it then transports it to the ore exit level roadway via the ore exit roadway and out of the mining area via the transport roadway.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. All personnel and equipment operating areas are located in stable roadways and chambers outside the goaf, completely avoiding personnel working in unstable areas of the roof below the goaf, thus achieving inherent safety in the mining of residual ore.

[0021] 2. The length of the ore block matches the complete span of the goaf, and the two-way clustered blast holes at both ends fully cover the collapsed ore body, leaving no large amount of residual ore, which significantly improves the recovery rate of residual ore and the utilization rate of mineral resources in the goaf.

[0022] 3. The simultaneous advancement of two ore blocks, combined with the continuous ore extraction via trackless shovel transport, and the bottom reconstruction trench structure ensures smooth ore collection, avoids ore blockage, and significantly improves the daily ore extraction intensity of the mining area.

[0023] 4. The bottom structure can be constructed by modifying the existing middle section roadway, without the need for large-scale construction of new bottom roadways, thus reducing the amount of preparation work and lowering the overall mining cost. Attached Figure Description

[0024] To more clearly illustrate the technical solution of this application, the accompanying drawings used in this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a front view of a method for coordinated mining of residual ore flank cluster-shaped blast hole collapse and bottom structure reconstruction according to the present invention. Figure 2 yes Figure 1 Sectional view along the middle II-II direction; Figure 3 for Figure 1 Cross-sectional view along the middle III-III direction.

[0026] Figure 4 for Figure 1 Cross-sectional view along the N-N direction.

[0027] Figure 5 for Figure 2 A schematic diagram of the bottom structure of the trench has been formed.

[0028] The text labels shown in the diagram represent: 1. Transport roadway; 2. Mine exit roadway; 3. Mine exit access road; 4. Ventilation and pedestrian shaft; 5. Drilling chamber; 6. Cutting shaft; 7. Trench roadway; 8. Clustered blast holes; 9. Upward fan-shaped medium-deep holes; 10. Segmented roadway; 11. Goaf. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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, unless otherwise explicitly defined.

[0032] 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.

[0033] Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0034] For ease of explanation, the following embodiments use an example of a method for coordinated mining of residual ore flank cluster-shaped blast hole collapse and bottom structure reconstruction according to an embodiment of this application.

[0035] Please refer to Figures 1-5 This application discloses a method for the coordinated mining of residual ore flank cluster-shaped borehole collapse and bottom structure reconstruction, comprising the following steps: S1: Mineral block planning and mining parameters layout, dividing and arranging mineral blocks perpendicular to the ore body strike; S2: Construction of the mining preparation project: Mining level roadway 2 is arranged on both sides along the length of the ore block. Mining access roadway 3 is arranged inclined from mining level roadway 2 towards the center of the bottom of the ore body. Mining access roadway 2 and mining level roadway 3 are connected. Ventilation and pedestrian shafts 4 are excavated upward in the transport roadways 1 on both sides of the ore block to connect the upper and middle sections. Drilling chambers 5 are excavated from ventilation and pedestrian shafts 4 to both ends of the ore block to be mined. S3: Construction of ore collection trench, which involves reconstructing a trench-type ore collection bottom structure that connects with the goaf in the lower part of the goaf. S4: The ore body is mined by blasting in stages. In the drilling chambers 5 at both ends of the ore block, down-the-hole drills are used to drill cluster-shaped blast holes 8 into the ore block. The vertical height of the cluster-shaped blast holes 8 is the vertical distance between the two drilling chambers. Using the goaf below the residual ore as the free face, the cluster-shaped blast holes 8 are drilled in stages from bottom to top to break off the residual ore above the goaf. The broken ore is then extracted by a loader at the bottom of the trench. The above operation is repeated to complete the drilling, blasting, and extraction of the ore body in stages until all the residual ore above the goaf of this ore block is mined out. Then, the mining of the next ore block is started.

[0036] In the above embodiments, by drilling clustered blast holes in eight layers of collapsed ore body on the flank of the mining area and reconstructing the bottom structure, the danger of personnel being exposed to working under the goaf is eliminated, the inherent safety of mining operations is improved, and at the same time, the ore recovery rate and resource utilization rate are effectively increased, providing a reliable technical solution for the safe and secure mining of residual ore bodies under complex conditions.

[0037] In some implementation examples, the ore block width is 20m, and the length of the ore block is not less than the maximum span of the existing goaf below, and is greater than the width of the ore block. In some implementation examples, the ore block height is 48-52m, and the upper ore body of the goaf is arranged in segments with a segment height of 15-20m.

[0038] In the above implementation, the length of the ore block matches the complete span of the goaf, and the bidirectional clustered blast holes at both ends fully cover the collapsed ore body, leaving no large amount of residual ore, which significantly improves the recovery rate of residual ore and the utilization rate of mineral resources in the goaf.

[0039] Furthermore, in some implementation examples, S3 specifically involves: excavating a cutting riser 6 and a cutting cross passage at one end of the bottom of the ore block, with the cutting cross passage connecting to the cutting riser to serve as the drilling space for the blasting cutting groove; constructing a trench level passage 7 along the bottom of the ore block, with the trench level passage 7 penetrating the bottom area of ​​the ore block; drilling upward parallel medium-deep holes in the cutting cross passage and blasting to form a cutting groove; drilling upward fan-shaped medium-deep holes 9 in the trench level passage, using the cutting groove as a free face to blast and form a ore-gathering trench, which also connects to the goaf.

[0040] In the above implementation method, the bottom structure is constructed by modifying the existing middle section transport roadway, without the need for large-scale construction of new bottom roadways, thus reducing the amount of preparation work and lowering the overall mining cost.

[0041] In some implementation examples, the cross-sectional dimensions of the cutting well 6 and the cutting cross passage are 3.0 × 3.0 m.

[0042] In some implementation examples, the vertical distance between the upper and lower drilling chambers 5 is half the segment height. After all the residual ore in this block has been mined, the empty area will be subsequently backfilled.

[0043] Furthermore, in some implementation examples, during blasting mining operations, mining operations are carried out simultaneously on two adjacent blocks.

[0044] In the above implementation method, adjacent ore blocks are mined simultaneously, which improves mining efficiency.

[0045] Furthermore, in some implementation examples, the ventilation pedestrian well 4 serves as the main passage for construction personnel to reach the segmented roadway 10 and for ventilation. The ventilation pedestrian well 4 is sized to allow passage for personnel and rock drilling equipment, and the roadway dimensions are 2.0 × 1.5m.

[0046] Furthermore, in some implementation examples, the loader transfers the blasted ore in the ore collection trench to the ore exit roadway; it then transports it via the ore exit roadway 3 to the ore exit level roadway 2, and finally out of the mining area via the transport roadway 1 through the ore exit level roadway 2.

[0047] Specific embodiments are listed below. It should be noted that the embodiments described below are exemplary and are only used to explain this application, and should not be construed as limiting this application. Where specific technologies or conditions are not specified in the embodiments, they shall be performed in accordance with the technologies or conditions described in the literature in this field or in accordance with the product manual.

[0048] This embodiment provides a detailed explanation of a method for the coordinated mining of residual ore flank cluster-shaped blast hole collapse and bottom structure reconstruction.

[0049] like Figure 1-5 As shown, the specific steps for mining a certain residual ore using the mining method of this application are as follows: (1) The ore body is vertically divided into independent mining blocks with a uniform width of 20m. The length of the mining block matches the maximum span of the lower goaf. In this embodiment, the goaf span is 48m, so the length of the mining block is set to 48m. The total height of a single mining block is controlled at 50m. The mining is divided into sections along the vertical direction, with a standard section height of 16.6m.

[0050] (2) A transport roadway 1 is arranged on the upper and lower plates at the bottom of the ore block, with a roadway specification of 4.1×3.9m; (3) Mining roadway 2 is arranged on both sides along the length of the ore block. Mining access road 3 is arranged inclined from mining roadway 2 towards the center of the bottom of the ore body. Mining access road 3 is connected to mining roadway 2 to facilitate ore transfer. The roadway specifications are 3.4×3.2m to meet the passage of WJ-2 loader.

[0051] (3) In the transport roadway 1 on both sides of the ore block, the ventilation and pedestrian well 4 is excavated upward by the well drilling rig to connect the upper and middle sections, serving as the main passage for construction personnel to reach the segment roadway 10 and ventilation. The ventilation and pedestrian well 4 is sized to allow passage for personnel and rock drilling equipment, and the roadway is 2.0×1.5m in size.

[0052] (4) From the ventilation and pedestrian well 4, drilling chambers 5 are excavated at both ends of the mining block to be recovered. The vertical distance between the two drilling chambers 5 is set to half the segment height, i.e., 8.3m; (5) A cutting well 6 and a cutting cross tunnel are excavated at one end of the bottom of the ore block. The cutting cross tunnel is connected to the cutting well 6 and serves as the drilling space for the blasting cutting groove. The cross-sectional dimensions of the cutting well 6 and the cutting cross tunnel are 3.0×3.0m. (6) Construct trench level 7 along the bottom of the ore block. Trench level 7 runs through the bottom area of ​​the ore block, creating working conditions for trench forming, rock drilling, and ore extraction.

[0053] (7) Drill upward parallel medium-deep holes in the cutting transverse tunnel, blast to form a cutting groove, and use YGZ-90 drilling machine to drill upward fan-shaped medium-deep holes 9 in the trench level tunnel.

[0054] (8) Using the formed cutting groove as the blasting free face, the upward fan-shaped medium-deep hole 9 is opened in the blasting trench level roadway 7; after blasting, a bottom ore collection trench is formed, which is connected to the original goaf above, and the collapsed ore can automatically collect in the trench.

[0055] (9) In the rock drilling chambers 5 at both ends of the ore block, a KQD-100 down-the-hole drill is used to drill cluster-shaped blast holes 8 into the ore block. The vertical height of the cluster-shaped blast holes 8 is the vertical distance between the two rock drilling chambers 5, and the diameter of the holes is 80mm. (10) Two adjacent mining blocks are simultaneously mined on the plane to improve the overall mining efficiency; vertically, a bottom-up blasting process is adopted, and the free face of the goaf is blasted throughout the process.

[0056] (11) Using the lower goaf of the residual ore as the free face, the cluster of blast holes 8 are drilled from bottom to top in stages, and the micro-differential detonation is carried out in stages to collapse the upper part of the goaf layer by layer; all drilling and charging operations are completed in stable roadways and chambers, and the staff do not need to enter the dangerous area below the goaf.

[0057] (12) The collapsed ore is transported to the bottom of the trench by WJ-2 loader. The loader transports the collapsed ore in the mining trench to the mining access road 3. It is then transported to the mining level roadway 2 via the mining access roadway 3 and then transported out of the mining area via the transportation roadway 1 through the mining level roadway 2.

[0058] (13) Repeat the above operations to complete the rock drilling, blasting and ore extraction operations in stages. Continue the cyclical construction as described above until all the residual ore above the goaf of this block is mined out; then move on to the next block for continued mining.

[0059] (14) After all the residual ore in a single block is mined, the lower through-hole area is subsequently filled to control the deep ground pressure and eliminate the risk of rock instability caused by the long-term suspension of a large area of ​​void.

[0060] This embodiment relies on the existing intermediate transport roadway, arranges ore extraction horizontal roadways along both sides of the ore block, and provides a matching inclined connecting ore extraction access road. The ore collection trench is reconstructed below the goaf, so that ore collection and trackless shoveling can be completed without personnel entering below the goaf. Clustered deep holes are arranged in the upper and lower double-layer rock drilling chambers of the ore block, and the existing goaf below is used as the blasting free face. The upper residual ore is defused by micro-differential blasting from bottom to top. All rock drilling and charging operations are completed in the stable roadway chambers outside the goaf, so as to achieve safe operation.

[0061] It should be noted that the above-described embodiments are merely examples. Any embodiments that have the same structure and achieve the same effect as the technical concept within the scope of this application are included in the scope of this application. Furthermore, without departing from the spirit of this application, 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, are also included in the scope of this application.

Claims

1. A method for coordinated mining of residual ore side wing cluster holes with re- construction of the bottom structure, characterized in that, Includes the following steps: S1: Mineral block planning and mining parameters layout, dividing and arranging mineral blocks perpendicular to the ore body strike; S2: Construction of the mining preparation project, with mining level roadways arranged on both sides along the length of the ore block, and mining access roadways arranged inclined from the mining level roadways towards the center of the bottom of the ore body, the mining access roadways and mining level roadways connected; ventilation and pedestrian shafts are excavated upward in the transport roadways on both sides of the ore block to connect the upper and middle sections; rock drilling chambers are excavated from the ventilation and pedestrian shafts to both ends of the ore block to be mined; S3: Construction of ore collection trench, which involves reconstructing a trench-type ore collection bottom structure that connects with the goaf in the lower part of the goaf. S4: The ore body is mined by blasting in stages. In the drilling chambers at both ends of the ore block, cluster-shaped blast holes are drilled into the ore block. The vertical height of the cluster-shaped blast holes is the vertical distance between the two drilling chambers. Using the goaf below the residual ore as the free face, the cluster-shaped blast holes are blasted in stages from bottom to top to break off the residual ore above the goaf. The broken ore is then extracted using a loader at the bottom of the trench. The above operation is repeated to complete the drilling, blasting, and extraction of the ore body in stages until all the residual ore above the goaf of this ore block is mined out. Then, the mining of the next ore block continues.

2. The method for coordinated mining of residual ore flank cluster-shaped borehole collapse and bottom structure reconstruction according to claim 1, characterized in that, The width of the ore block is 20m, and the length of the ore block is not less than the maximum span of the existing goaf below, and is greater than the width of the ore block.

3. The method for coordinated mining of residual ore flank cluster-shaped borehole collapse and bottom structure reconstruction according to claim 2, characterized in that, The ore block height is 48-52m, and the upper part of the goaf ore body is divided into sections with a section height of 15-20m.

4. The method for coordinated mining of residual ore flank cluster-shaped borehole collapse and bottom structure reconstruction according to claim 1, characterized in that, Specifically, S3 involves: excavating a cutting riser and a cutting cross passage at one end of the bottom of the ore block, with the cutting cross passage connecting to the cutting riser to serve as the drilling space for the blasting cutting trench; constructing a trench level passage along the bottom of the ore block, which runs through the bottom area of ​​the ore block; drilling upward parallel medium-deep holes in the cutting cross passage and blasting to form a cutting trench; drilling upward fan-shaped medium-deep holes in the trench level passage and blasting with the cutting trench as the free face to form a ore-gathering trench, which also connects to the goaf.

5. The method for coordinated mining of residual ore flank cluster-shaped borehole collapse and bottom structure reconstruction according to claim 1, characterized in that, The cross-sectional dimensions of the cutting well and the cutting cross passage are 3.0 × 3.0 m.

6. The method for coordinated mining of residual ore flank cluster-shaped borehole collapse and bottom structure reconstruction according to claim 1, characterized in that, The vertical distance between the upper and lower drilling chambers is half the height of the segment.

7. The method for coordinated mining of residual ore flank cluster-shaped borehole collapse and bottom structure reconstruction according to claim 1, characterized in that, After all the remaining ore in this block has been mined, the empty area will be filled in.

8. The method for coordinated mining of residual ore flank cluster-shaped borehole collapse and bottom structure reconstruction according to claim 1, characterized in that, During blasting and mining operations, mining operations are carried out simultaneously on two adjacent blocks.

9. A method for coordinated mining of residual ore flank cluster-shaped borehole collapse and bottom structure reconstruction according to claim 1, characterized in that, The ventilation and pedestrian well serves as the main passage for construction workers to reach the segmented tunnels and for ventilation. The ventilation and pedestrian well is sized to allow passage for personnel and rock drilling equipment. The tunnel dimensions are 2.0 × 1.5m.

10. A method for coordinated mining of residual ore flank cluster-shaped borehole collapse and bottom structure reconstruction according to claim 1, characterized in that, The loader transports the blasted ore from the ore collection trench to the ore exit roadway; it then transports it through the ore exit roadway to the ore exit level roadway, and finally out of the mining area via the transport roadway.

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