A method for mining hardened ore by recreating a mine tunnel using a jacking pipe

Abstract

The invention discloses a method for mining compacted hole ore by reconstructing a mine tunnel using a top pipe, and relates to the field of mining technology, including: S1, dividing the ore body into at least one ore block based on a vein tunnel, S2, arranging concrete reaction walls in the vein tunnels on opposite sides of the ore block in a direction parallel to the connecting tunnel, S3, arranging a disassembly type positioning track at the bottom of the free surface end of the concrete reaction wall, S4, arranging a steel type reaction force dispersion frame close to the free surface of the concrete reaction wall, and fixing the steel type reaction force dispersion frame on the free surface of the concrete reaction wall through a jack base, S5, transporting the top pipe structure to the disassembly type positioning track, S6, pushing the top pipe structure into the position of the track at the end of the connecting tunnel by a push jack, entering the mine exit space through the top pipe structure, and recovering the compacted hole ore inside the top pipe structure. The invention recovers the compacted hole ore inside the top pipe, realizes the efficient recovery of high-sulfur compacted hole ore, has high safety performance, and is simple in process.

Description

Technical Field

[0001] The invention relates to the technical field of mining, in particular to a method for mining compacted ore by recreating a mine tunnel with a top pipe. Background Art

[0002] Among the earth's material composition, four elements, iron, oxygen, silicon and magnesium, account for 90% of the earth. The content of sulfur ranks sixth in the overall content of materials, with abundant content and prominent status. Due to the chemical activity of sulfur and its important position in the earth's composition, sulfur plays an extremely important role in mineralization. Almost all copper, lead-zinc and molybdenum mines, most gold, silver, mercury, bismuth, nickel and cobalt mines, most tin, antimony and titanium mines, and some iron, manganese, chromium and tungsten mines are composed of sulfides. In the mining of sulfide deposits, after the ore body is blasted into a pile and stored in the mine room, the operators cannot immediately mine all the ore, but must go through a certain period of time to recover and transport it through the bottom mining structure. During the storage period of high-sulfur ore, due to the migration of valuable metal elements and impurity elements, chemical precipitation is easily formed in the high-sulfur ore pile, causing the ore pile to compact.

[0003] During ore recovery, the compaction of the ore makes it impossible for the ore to roll down from the bottom ore-exit structure under the condition of self-weight stress. Equipment and operators cannot enter the mine room due to safety regulations, so it is easy to retain a large amount of ore, resulting in a large loss of ore. At present, there is no matching technical method for mining this type of ore deposit. The mining of this type of metal ore deposit is still carried out by backfill mining or subsequent backfill mining. Since this type of ore deposit is mainly composed of precious metals, the recovery rate of ore is an important mining indicator in ore mining, and pillar recovery is also particularly important.

[0004] The medium-deep hole stage subsequent filling mining method is often adopted by mines due to its high safety, good operating conditions, large mining capacity and high production efficiency. However, the existing medium-deep hole stage subsequent filling mining method mainly recovers ore by optimizing the layout of mining and cutting engineering construction, not leaving cutting shaft grooves, optimizing the bottom structure of ore placement, etc. Although this type of method can safely and stably recover ore pillars, reduce ore losses and improve the safety of ore recovery, it is also for ores with special physical and chemical properties. This method has certain inapplicability and has great limitations for the recovery of sulfide-rich and easy-to-crust ores. In addition, if the original method is still used for the recovery of high-sulfur ores, it is bound to require equipment and manpower to enter the mine room for construction, which greatly violates the constraints of relevant policies and regulations, and is likely to cause major safety accidents in mines and affect mine production safety. Summary of the invention

[0005] The present invention provides a method for mining compacted ore by recreating a mine tunnel with a top pipe, so as to solve the problems that the subsequent backfill mining method is insufficiently applicable to the mining process of ore deposits with special physical and chemical properties, cannot safely and efficiently mine high-sulfur ore deposits, and the existing mining equipment and technology cannot handle the problem of high-sulfur ore accumulation and compaction. By pushing a top pipe structure into a mine room from a connecting tunnel, the compacted ore is recovered inside the top pipe, and efficient recovery of high-sulfur compacted ore is achieved. The method has high safety performance, simple process, and can recover ores with special physical and chemical properties. The method has a high recovery rate and can reduce the mine impoverishment and loss rates.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A method for mining hardened ore by recreating a mine tunnel using a jacking pipe, comprising:

[0008] S1, divide the ore blocks, arrange the main transport lanes in stages on the upper and lower walls of the ore bed, the main transport lanes are located on opposite sides of the ore body, in the same stage, take the main transport lanes as the development space and arrange the vein lanes at intervals along the ore body strike, and divide the ore body into at least one ore block based on the vein lanes;

[0009] S2, concrete reaction wall is set up. Concrete reaction wall is arranged in the vein tunnels on opposite sides of the ore block in the direction parallel to the connecting tunnel. The height of the concrete reaction wall is four fifths of the height of the connecting tunnel, and the free surface of the concrete reaction wall is directly opposite to the connecting tunnel;

[0010] S3, arrange a disassembly type positioning track, which is arranged at the bottom of the free surface end of the concrete reaction wall, with one end of the disassembly type positioning track close to the bottom of the free surface of the concrete reaction wall, and the other end extending to the end surface of the connecting tunnel and exceeding the end surface by a jacking pipe thickness;

[0011] S4, fix the steel reaction force dispersion frame, the steel reaction force dispersion frame is arranged close to the free surface of the concrete reaction force wall, and the steel reaction force dispersion frame is fixed to the free surface of the concrete reaction force wall through the jack base, the jack base fixes the detachable positioning track to the tunnel ground, the propulsion jack is fixed on the jack base, and the bottom end of the jack is fixed on the steel reaction force dispersion frame;

[0012] S5, the jacking pipe structure is transported to the working surface, and the jacking pipe structure is transported to the disassembly type positioning track, the track groove at the bottom of the jacking pipe structure is correspondingly embedded in the disassembly type positioning track, the disassembly type metal stress plate is fixed to the end face of the jacking pipe structure, and the connection type propulsion rod used by the propulsion jack is lengthened. When one end of the propulsion rod approaches the center of the disassembly type metal stress plate at the end of the jacking pipe structure, the propulsion jack makes the connection type propulsion rod closely contact with the disassembly type metal stress plate at the end of the jacking pipe;

[0013] S6, harvest the plate-bound ore, push the jacking structure into the track position at the end of the connecting tunnel with the thrust jack, retract the thrust jack, put away the detachable metal load-bearing plate, enter the mine exit space through the jacking structure, and harvest the plate-bound ore inside the jacking structure.

[0014] In some embodiments, the method of using a top pipe to recreate a mine tunnel to mine hardened ore also includes:

[0015] S7, after the recovery of the compacted ore in the recovery range of the initial top pipe structure is completed, a disassembly type positioning track is arranged at the end of the initial top pipe structure, and the new top pipe structure is pushed into the connecting tunnel in the same way, and a metal pin is inserted into the metal pin groove reserved in the initial top pipe structure, so that the initial top pipe structure and the new top pipe structure are close to each other and connected to form a whole through the metal pin groove;

[0016] S8, repeat the work of S6 until all the compacted ore is recovered.

[0017] In some embodiments, in step S6, the jacking pipe structure is pushed into the ore-releasing space in a staggered manner based on the vein tunnels on both sides of the ore block, and the recovery of compacted ore is started from the opposite sides of the main transport tunnel. The transportation equipment is transported on the opposite sides of the main transport tunnel to prevent the transportation equipment from gathering and causing safety accidents and blockages that affect work efficiency.

[0018] In some embodiments, the method of using jacking pipes to recreate a mine tunnel to mine compacted ore also includes: after the jacking pipe construction on both sides of the ore block near the main transportation tunnel is completed, the connecting propulsion rods, propulsion jacks, detachable positioning rails, steel reaction force dispersion frames, and jack bases are removed, the concrete reaction force walls are retained, the removed structural equipment is moved into the vein tunnel, and S2 to S6 are repeated until all the compacted ore is recovered.

[0019] In some embodiments, after the easily compacted stock ore is transported out by the top pipe construction plan, a filling retaining wall is arranged in the connecting tunnel, and a filling system is arranged in the stage vein tunnel. The filling body is transported by the filling system to the empty area of ​​the mine room to form a complete filling body pillar.

[0020] In some embodiments, in step S1, the main transport tunnel is set up in stages, and the stage height is set to 50-60m. In one stage, the main transport tunnel is used as the development space and the vein tunnels are arranged every 20-30m along the ore body.

[0021] In some embodiments, the ore body is divided into mutually spaced ore blocks by cross-vein tunnels, and the ore blocks are mined and backfilled one by one.

[0022] In some embodiments, the method of using a top pipe to recreate a mine tunnel to mine compacted ore also includes: after all the ore blocks in one stage are mined out, mining of the ore blocks in another stage is carried out until the entire ore body is mined and backfilled.

[0023] In some embodiments, in step S2, the connecting tunnel and the vein tunnel extend in a direction with an angle of 25° to 30°, and the concrete reaction wall extends along the vein tunnel at an angle of 25° to 30°.

[0024] In some embodiments, the method of using top pipe to recreate a mine lane to mine compacted ore, before step S2, also includes: using the main transport lane as a free space, arranging medium and deep holes in the next stage mine room through the stage vein tunnel and performing blasting to drop the ore, the ore is stored in the mine room, and the uncompacted ore is transferred from the connecting lane to the vein tunnel, and then transported to the main transport lane via the vein tunnel, and finally transported out through the main transport lane.

[0025] In the above scheme, the jacking construction technology is used to avoid the limitations of the existing ore recovery methods in recovering ore blocks and recovering high-sulfur plate-bound ores in pillars. The ore deposit is divided into multiple ore blocks by arranging two main transportation tunnels on the top and bottom plates of the ore body and multiple vein-penetrating tunnels in the ore body. The jacking construction process is arranged in the vein-penetrating tunnel. The vein-penetrating tunnel can not only be used for the mining of the original mine room, but also can be used as the layout space for the jacking construction process in the pillar recovery work. This layout method can greatly improve the ore recovery rate and the mining efficiency of the ore deposit.

[0026] In the above scheme, the jacking construction technology has certain advantages in ore recovery, is safe and reliable, and has high construction efficiency. The jacking structure can be customized according to the different specifications of underground connecting tunnels in different types of mines, and the jacking structure uses a positioning track to push into the plate-bound ore and uses metal pins for connection and fixation. This method can effectively improve the construction efficiency of on-site workers, allowing the jacking structure to enter the empty area to form a complete overall protection structure, thereby improving the safety of on-site workers and equipment and fully meeting the requirements of relevant policies and regulations.

[0027] The above scheme is suitable for the mining and recovery of ore deposits with higher ore value grade. It can greatly improve the recovery rate of ore and effectively reduce the double rate of dilution and loss in ore body recovery. The method is simple and convenient, and the workers and equipment are safe and efficient.

[0028] In some preferred examples of the above scheme, the filling system arranged in the stage tunnel will backfill the tailings materials formed by mining the ore deposit into the goaf to prevent a large amount of tailings materials from accumulating on the surface and occupying land resources. Moreover, since the ore deposit is a high-sulfur ore deposit, the backfilling of the tailings materials can also prevent the pollution of the surface environment by high-sulfur compounds, which can meet the green production requirements of the mine, is technically feasible, and economically reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 is a schematic diagram of mineral deposit mining in an embodiment of the present invention;

[0031] Figure 2 yes Figure 1 Schematic diagram of AA' direction;

[0032] Figure 3 Schematic diagram of pipe jacking construction in an embodiment of the present invention;

[0033] Figure 4 yes Figure 3 A magnified view of a part in the middle;

[0034] Figure 5 yes Figure 3 A schematic diagram from another angle;

[0035] Figure 6 yes Figure 5 Schematic diagram of the middle BB' direction;

[0036] Figure 7 yes Figure 5 Schematic diagram of CC' direction;

[0037] Figure 8 Schematic diagram of pillar mining in an embodiment of the present invention;

[0038] Fig. 9 Figure 8 Schematic diagram in DD' direction.

[0039] Reference numerals

[0040] 1-main transport tunnel; 2-mine room; 3-mine pillar; 4-hardened ore; 5-mine exit space; 6-vein tunnel; 7-connecting tunnel; 8-jacking structure; 9-transportation equipment; 10-detachable positioning track; 11-concrete reaction wall; 12-steel reaction dispersion frame; 13-propelling jack; 14-connecting propulsion rod; 15-jack base; 16-metal pin; 17-detachable metal load-bearing plate at the jacking end; 18-stage vein tunnel; 19-filling body; 20-filling retaining wall. DETAILED DESCRIPTION

[0041] Among the existing methods for recovering ore pillars, a cutting lane is constructed on the upper plate of the mine exit lane, a row of pre-cracked holes are constructed on one side of the cutting lane, and a cutting well is not constructed as a blasting compensation space for the cutting lane, so as to make full use of the shape of the peach-shaped ore pillar and adopt the blasting groove pulling technology without a cutting well to achieve the purpose of pulling grooves for the peach-shaped ore pillars, thereby carrying out the application of peach-shaped ore pillar recovery. Although this method can save a lot of mining and cutting engineering, ensure safe construction, and improve the recovery rate of ore resources, it has certain limitations for recovering ores with special physical and chemical properties, and has great limitations for recovering sulfide-rich and easy-to-crust ore.

[0042] Another method is to form an artificial false roof by arranging grouting anchors in the tailings filling body in the stage transport level tunnel, and adopt the upward horizontal layered approach filling mining method to recover the horizontal isolation pillars. Although this method can recover all the pillars safely and efficiently, it also has certain limitations for recovering ores with special physical and chemical properties, and has greater limitations for the recovery of sulfide-rich and easily compacted ores.

[0043] To make the purpose, technical solutions and advantages of the present invention more clear, the following will be combined with the attached Figures 1 to 9 The embodiments of the present invention are described in further detail.

[0044] An embodiment of the present invention provides a method for mining hardened ore by recreating a mine tunnel using a top pipe, the method comprising:

[0045] S1, divide the ore blocks, combine Figure 1 and Figure 2 , main transport tunnels 1 are arranged in stages on the upper and lower walls of the ore bed, and the main transport tunnels 1 are located on opposite sides of the ore body. In the same stage, vein-crossing tunnels 6 are arranged at intervals along the strike of the ore body with the main transport tunnels 1 as the development space, and the ore body is divided into at least one ore block based on the vein-crossing tunnels 6;

[0046] S2, set concrete reaction wall 11, combined Figures 3 to 7 , concrete reaction walls 11 are arranged in the vein tunnels 6 on opposite sides of the ore block in a direction parallel to the connecting tunnel 7, the height of the concrete reaction wall 11 is four fifths of the height of the connecting tunnel 7, and the free surface of the concrete reaction wall 11 is directly opposite to the connecting tunnel 7;

[0047] S3, arrange the disassembly type positioning track 10, combine Figures 3 to 7 The detachable positioning track 10 is arranged at the bottom of the free surface end of the concrete reaction wall 11, one end of the detachable positioning track 10 is close to the bottom of the free surface of the concrete reaction wall 11, and the other end is extended to the end surface of the connecting tunnel 7 and exceeds the end surface by a jacking pipe thickness;

[0048] S4, fixed steel reaction force dispersion frame 12, combined Figures 3 to 7The steel reaction force dispersion frame 12 is arranged close to the free surface of the concrete reaction force wall 11, and the steel reaction force dispersion frame 12 is fixed to the free surface of the concrete reaction force wall 11 through the jack base 15. The jack base 15 fixes the detachable positioning track 10 to the tunnel ground, and the propulsion jack 13 is fixed on the jack base 15, and the bottom end of the jack 13 is fixed on the steel reaction force dispersion frame 12;

[0049] S5, the top pipe structure 8 is transported to the working face, combined with Figures 3 to 7 , the jacking pipe structure 8 is transported to the disassembly type positioning track 10, the track groove at the bottom of the jacking pipe structure 8 is correspondingly embedded in the disassembly type positioning track 10, the disassembly type metal stress plate 17 is fixed to the end face of the jacking pipe structure 8, and the connection type propulsion rod 14 used by the propulsion jack 13 is lengthened. When one end of the propulsion rod approaches the center of the disassembly type metal stress plate 17 at the end of the jacking pipe structure, the propulsion jack 13 makes the connection type propulsion rod 14 closely contact with the disassembly type metal stress plate 17 at the end of the jacking pipe;

[0050] S6, harvesting plate deposits 8, combined Figures 3 to 7 The pushing jack 13 pushes the jacking structure 8 into the end track position of the connecting tunnel 7, retracts the pushing jack 13, retracts the detachable metal load-bearing plate 17, enters the mining space 5 through the jacking structure 8, and collects the compacted ore 4 inside the jacking structure 8.

[0051] According to an embodiment of the present invention, the jacking construction technology is used to avoid the limitations of the existing ore recovery methods for recovering ore blocks and recovering high-sulfur plate-bound ores in ore pillars. The ore deposit is divided into multiple ore blocks by arranging two main transport lanes 1 on the top and bottom plates of the ore body and arranging multiple through-vein lanes 6 in the ore body. The jacking construction process is arranged in the through-vein lane 6. The through-vein lane 6 can not only be used as the mining of the original mine room, but also can be used as the layout space of the jacking construction process in the ore pillar recovery work. This arrangement method can greatly improve the recovery rate of ore and the mining efficiency of the ore deposit. The jacking structure 8 can be customized according to the different specifications of the underground connecting lanes of different types of mines, and the jacking structure 8 uses a positioning track to push into the plate-bound ores 4 and uses metal pins for connection and fixing. This method can effectively improve the construction efficiency of on-site workers, so that the jacking structure 8 enters the empty area to form a complete overall protection structure, improve the safety of on-site workers and equipment, and fully meet the requirements of relevant policies and regulations.

[0052] In addition, for the mining and recovery of ore deposits with higher ore value grades, the ore recovery rate can be greatly improved, and the double rates of impoverishment and loss in ore body recovery can be effectively reduced. The method is simple and convenient, the workers and equipment are safe in construction, and the efficiency is relatively high. The filling system arranged in the stage tunnel will backfill the tailings formed by the mining of the ore deposit into the goaf to prevent a large amount of tailings from accumulating on the surface and occupying land resources. Moreover, since the ore deposit is a high-sulfur ore deposit, the backfilling of tailings can also prevent the pollution of the surface environment by high-sulfur compounds, which can meet the green production requirements of mines, is technically feasible, and economically reasonable.

[0053] It should be noted that the combination of up and down directions Figure 1 In the direction shown, in S1, the main transport tunnels 1 are arranged in stages on the upper and lower plates of the ore bed, and the main transport tunnels 1 are located on opposite sides of the ore body, wherein the opposite sides of the ore body can be opposite sides in the up and down direction, that is, the upper side of the ore body and the lower side of the ore body. The main transport tunnel 1 of the previous stage is used as a free space, and medium-depth holes are arranged in the mine room 2 of the next stage through the stage vein tunnel 18, and blasting and dropping of ore are carried out. The ore is stored in the mine room 2, and the operating personnel use the transportation equipment 9 to enter the connecting tunnel 7 to transport out the uncompacted ore. With the gradual transportation of the ore, most of the uncompacted ore is transported to the main transport tunnel 1 by the transportation equipment 9 through the vein tunnel 6, and then the ore is transported to the surface beneficiation plant through the ramp or other types of ore transportation methods.

[0054] After the unconsolidated ore is transported, the compacted ore 4 is stored in the mine room 2 in large quantities and cannot be squeezed into the connecting tunnel 7 under the action of self-weight stress, so a large amount of the ore is compacted and stored in the ore drop space 5. At this time, since the equipment and staff enter the ore drop space 5 for ore recovery, it does not meet the requirements of relevant policies and regulations, and there is a great safety hazard. Therefore, for the recovery of the compacted ore 4, the top pipe construction process is introduced to recover the compacted ore 4.

[0055] In the above embodiment, the method of using a top pipe to recreate a mine lane to mine hardened ore also includes:

[0056] S7, combined Figure 8 and Fig. 9 After the hardened ore 4 is recovered within the recovery range of the initial jacking pipe structure, a disassembly type positioning track 10 is arranged at the end of the initial jacking pipe structure, and the new jacking pipe structure is pushed into the connecting tunnel 7 in the same way, and a metal pin 16 is inserted into the metal pin groove reserved in the initial jacking pipe structure, so that the initial jacking pipe structure and the new jacking pipe structure are close to each other and connected to form a whole through the metal pin groove;

[0057] S8, combined Figure 8 and Fig. 9 , repeat the work of S6 until all the compacted ore is recovered.

[0058] In the above embodiment, combined with Figure 3 In step S6, the jacking pipe structure 8 is pushed into the ore-laying space 5 in a staggered manner based on the vein tunnels 6 on both sides of the ore block, and the recovery of the compacted ore 4 is started from the opposite sides of the main transport tunnel 1. The transportation equipment 9 transports on the opposite sides of the main transport tunnel to prevent the transportation equipment 9 from gathering and causing safety accidents and blockages that affect work efficiency.

[0059] In the above embodiment, the method of using jacking pipes to recreate a mine tunnel to mine compacted ore also includes: after the jacking pipe construction on both sides of the ore block near the main transport tunnel 1 is completed, the connecting propulsion rod 14, the propulsion jack 13, the detachable positioning rail 10, the steel reaction force dispersion frame 12, and the jack base 15 are removed, the concrete reaction force wall 11 is retained, the dismantled structural equipment is moved into the vein tunnel 6, and S2 to S6 are repeated until all the compacted ore is recovered.

[0060] In the above embodiment, combined with Figure 8 and Fig. 9 After the easily compacted stock ore 4 is transported out by the top pipe construction plan, a filling retaining wall 20 is arranged in the connecting tunnel 7, and a filling system is arranged in the stage vein tunnel 18, and the filling body 19 is transported by the filling system to the empty area of ​​the mine room 2 to form a complete filling body ore pillar.

[0061] In the above embodiment, in step S1, the main transport tunnel 1 is set up in stages, and the stage height is set to 50-60m. In one stage, the main transport tunnel 1 is used as the development space and the vein tunnel 6 is arranged every 20-30m along the ore body. Figure 2 The main transport tunnel 1 is arranged on the upper and lower walls of the ore bed and on both sides of the ore body. Figure 1 The main transport tunnel 1 is set up in stages, and the stage height is set to 50-60m. In the first stage, the main transport tunnel 1 is used as the development space, and the vein tunnel 6 is arranged every 20-30m along the ore body. The vein tunnel 6 divides the ore body into ore blocks, and the ore blocks are mined one by one.

[0062] It needs to be explained that, combined with Figure 8 and Fig. 9 The ore body is divided into mutually spaced ore blocks by vein tunnels, and the ore blocks are mined and backfilled one by one. After the current ore pillar is mined, after the filling body 19 solidifies to form a filling body ore pillar, the ore pillar 3 is mined again by the method of steps S1 to S7.

[0063] In the above embodiment, the method of using top pipe to recreate the mine tunnel to mine the compacted ore also includes: after all the ore blocks in one stage are mined out, the ore blocks in another stage are mined out until the entire ore body is mined and backfilled.

[0064] In step S2 , the connecting tunnel 7 and the extending direction of the vein tunnel 6 form an angle of 25° to 30°, and the concrete reaction wall 11 extends along the angle direction of 25° to 30° of the vein tunnel 6 .

[0065] In the above embodiment, the method of using top pipe to recreate the mine lane to mine compacted ore, before step S2, also includes: using the main transport lane 1 as the free space, arranging medium and deep holes in the next stage mine room through the stage vein tunnel 18 and carrying out blasting and dropping ore, the ore is stored in the mine room, and the uncompacted ore is transferred from the connecting lane 7 to the vein tunnel 6, and then transported to the main transport lane 1 through the vein tunnel 6, and finally transported out through the main transport lane 1.

[0066] The implementation mode of the present invention utilizes the top pipe construction technology to construct an artificial safe mining tunnel to recover high-sulfur easily compacted ore. Workers and equipment carry out the recovery of the compacted ore 4 in the space of the top pipe structure 8. Not only is the construction process simple and safe, but also it has a high recovery efficiency, a low depletion and loss rate and a portable construction process for the recovery of high-sulfur compacted ore with higher value grade.

[0067] The above-mentioned implementation method can effectively meet the requirement that on-site workers and equipment are not exposed to the goaf, ensure the safety of equipment and workers, comply with the requirements of relevant policies and regulations, and use the filling system arranged in the stage tunnel to backfill the tailings formed by the mining of the ore deposit into the goaf to prevent a large amount of tailings from accumulating on the surface and occupying land resources. Moreover, since the ore deposit is a high-sulfur ore deposit, the backfilling of the tailings can also prevent the pollution of the surface environment by high-sulfur compounds, which is of great significance for realizing green, safe and efficient mining of mines.

[0068] It should also be noted that, in this article, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0069] Finally, it should be noted that the above is a preferred embodiment of the present invention. It should be pointed out that although the preferred embodiment of the present invention has been described, for those skilled in the art, once the basic creative concept of the present invention is known, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. Therefore, the attached claims are intended to be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the embodiments of the present invention.

Claims

1. A method for mining compacted ore by recreating a mine tunnel using a jacking pipe, characterized in that: include: S1, divide the ore blocks, arrange the main transport lanes in stages on the upper and lower walls of the ore bed, the main transport lanes are located on opposite sides of the ore body, in the same stage, take the main transport lanes as the development space and arrange the vein lanes at intervals along the ore body strike, and divide the ore body into at least one ore block based on the vein lanes; S2, concrete reaction wall is set up. Concrete reaction wall is arranged in the vein tunnels on opposite sides of the ore block in the direction parallel to the connecting tunnel. The height of the concrete reaction wall is four fifths of the height of the connecting tunnel, and the free surface of the concrete reaction wall is directly opposite to the connecting tunnel; S3, arrange a disassembly type positioning track, which is arranged at the bottom of the free surface end of the concrete reaction wall, with one end of the disassembly type positioning track close to the bottom of the free surface of the concrete reaction wall, and the other end extending to the end surface of the connecting tunnel and exceeding the end surface by a jacking pipe thickness; S4, fix the steel reaction force dispersion frame, the steel reaction force dispersion frame is arranged close to the free surface of the concrete reaction force wall, and the steel reaction force dispersion frame is fixed to the free surface of the concrete reaction force wall through the jack base, the jack base fixes the detachable positioning track to the tunnel ground, the propulsion jack is fixed on the jack base, and the bottom end of the jack is fixed on the steel reaction force dispersion frame; S5, the jacking pipe structure is transported to the working surface, and the jacking pipe structure is transported to the disassembly type positioning track, the track groove at the bottom of the jacking pipe structure is correspondingly embedded in the disassembly type positioning track, the disassembly type metal stress plate is fixed to the end face of the jacking pipe structure, and the connection type propulsion rod used by the propulsion jack is lengthened. When one end of the propulsion rod approaches the center of the disassembly type metal stress plate at the end of the jacking pipe structure, the propulsion jack makes the connection type propulsion rod closely contact with the disassembly type metal stress plate at the end of the jacking pipe; S6, harvest the plate-bound ore, push the jacking structure into the track position at the end of the connecting tunnel with the thrust jack, retract the thrust jack, put away the detachable metal load-bearing plate, enter the mine exit space through the jacking structure, and harvest the plate-bound ore inside the jacking structure.

2. The method for mining compacted ore by recreating a mine tunnel using a jacking pipe as claimed in claim 1, characterized in that: Also includes: S7, after the recovery of the compacted ore in the recovery range of the initial top pipe structure is completed, a disassembly type positioning track is arranged at the end of the initial top pipe structure, and the new top pipe structure is pushed into the connecting tunnel in the same way, and a metal pin is inserted into the metal pin groove reserved in the initial top pipe structure, so that the initial top pipe structure and the new top pipe structure are close to each other and connected to form a whole through the metal pin groove; S8, repeat the work of S6 until all the compacted ore is recovered.

3. The method for mining compacted ore by recreating a mine tunnel using a jacking pipe as claimed in claim 1, characterized in that: In step S6, the jacking pipe structure is pushed into the ore-laying space in a staggered manner based on the vein tunnels on both sides of the ore block, and the recovery of compacted ore is started from the opposite sides of the main transport tunnel. The transportation equipment is transported on the opposite sides of the main transport tunnel to prevent the transportation equipment from gathering and causing safety accidents and blockages that affect work efficiency.

4. The method for mining compacted ore by recreating a mine tunnel using a jacking pipe as claimed in claim 1, characterized in that: Also includes: After the jacking construction on both sides of the main transport tunnel near the ore block is completed, the connecting thrust rod, thrust jack, detachable positioning rail, steel reaction force dispersion frame, and jack base are removed, the concrete reaction wall is retained, and the dismantled structural equipment is moved into the vein tunnel, and S2 to S6 are repeated until all the compacted ore is recovered.

5. The method for mining compacted ore by recreating a mine tunnel using a jacking pipe as claimed in claim 4, characterized in that: After the easily compacted stock ore is transported out by the jacking construction plan, a filling retaining wall is arranged in the connecting tunnel, and a filling system is arranged in the stage vein tunnel. The filling body is transported by the filling system to the empty area of ​​the mine room to form a complete filling body ore pillar.

6. The method for mining compacted ore by recreating a mine tunnel using a jacking pipe as claimed in claim 1, characterized in that: In step S1, the main transport tunnel is set up in stages, and the stage height is set to 50-60m. In one stage, the main transport tunnel is used as the development space and the vein tunnel is arranged every 20-30m along the ore body.

7. The method for mining compacted ore by recreating a mine tunnel using a jacking pipe as claimed in claim 6, characterized in that: The ore body is divided into mutually spaced blocks by vein tunnels, and the blocks are mined and backfilled one by one.

8. The method for mining compacted ore by recreating a mine tunnel using a jacking pipe as claimed in claim 7, characterized in that: Also includes: After all the ore blocks in one stage are mined out, the mining of ore blocks in another stage will be carried out until the entire ore body is mined and backfilled.

9. The method for mining compacted ore by recreating a mine tunnel using a jacking pipe as claimed in claim 1, characterized in that: In step S2, the connecting tunnel and the vein tunnel extend in a direction with an angle of 25° to 30°, and the concrete reaction wall extends along the direction of the vein tunnel with an angle of 25° to 30°.

10. The method for mining compacted ore by recreating a mine tunnel using a jacking pipe as claimed in claim 1, characterized in that: Before step S2, it also includes: using the main transport tunnel as a free space, arranging medium-depth holes in the next stage mine room through the stage vein tunnel and carrying out blasting and dropping ore, the ore is stored in the mine room, and the uncompacted ore is transferred from the connecting tunnel to the vein tunnel, and then transported to the main transport tunnel through the vein tunnel, and finally transported out through the main transport tunnel.

Images