Recycling method of brooded and stocked ore

Abstract

The invention belongs to the technical field of mine underground mining, and particularly relates to a recycling method of plate-bound exnix ore, which comprises a remote control carry-scraper, a horizontal V-shaped trench, a flat-bottom ore collecting roadway and an upper stope haulage roadway. An ore removal transportation roadway, a bottom ore removal access road and an ore receiving hopper are further arranged; the method comprises the following steps: 1, arranging an ore removal haulage roadway below an upper stope haulage roadway in the same direction as the upper stope haulage roadway; secondly, a bottom ore removal access road is arranged under the flat-bottom ore collecting roadway, and the direction of the bottom ore removal access road is consistent with that of the flat-bottom ore collecting roadway; and thirdly, an ore receiving hopper is arranged below the horizontal V-shaped trench, the horizontal V-shaped trench is communicated with the bottom ore outlet access road, and the ore receiving hopper is used for receiving hardened ore falling by means of self weight in the horizontal V-shaped trench. And fourthly, a remote control carry-scraper is used for recycling and carrying away the ore falling in the ore receiving hopper through the bottom ore removal access road. The recovery method has the effect of improving the recovery efficiency and also has the effect of reducing the safety risk.

Description

Technical Field

[0001] The invention belongs to the technical field of underground mining, and in particular relates to a method for recovering compacted ore. Background Art

[0002] In order to improve the resource recovery rate of mining, avoid the waste of mineral resources, and fully recycle and utilize ore resources, it is often necessary to carry out final recovery of the residual ore in the underground mine at the end of the recovery period. With the improvement of the mechanization and informatization level of mining equipment, although the application of advanced equipment such as remote-controlled scrapers is becoming more and more common, in the actual recovery process, especially when facing the V-shaped trench as the bottom mining tunnel, the ore pile has a serious problem of compaction, which makes it impossible to carry out remote-controlled shoveling of ore normally, which seriously affects the recovery efficiency and operation safety.

[0003] The existing technical solution is that the method for dealing with compacted ore piles mainly relies on horizontal construction by remote-controlled shovel loaders to reach the mine exit tunnel of the compacted ore pile directly, combined with remote control recovery and remote control charging blasting vibration and remote control equipment impacting the ore pile to shake off the ore for remote control recovery.

[0004] Other technical problems include poor recovery effect, low operating efficiency and high safety risks. Specifically, the mines that use this remote control method to recover ore are usually two-step mining, with backfill bodies on both sides. The layout of the tunnels is limited, and it is necessary to dig a mine tunnel in the backfill body directly to the compacted ore pile. The support requirements are high, the tunnel stability is poor, and there are great safety risks. At the same time, the parts that cannot be reached by the mine tunnel also need to be remotely controlled to be recovered. If only the remote control equipment is used for forced impact, there is a risk of the ore pile suddenly sliding and damaging, burying the equipment, and even endangering the safety of the operators.

[0005] In order to solve the problems of poor recycling effect, low operating efficiency and high safety risks in the existing technology, it is necessary to develop a new technical solution that should be able to improve the recycling efficiency through innovative methods while reducing safety risks, reducing safety accidents during operations, and protecting the safety of equipment and personnel. Summary of the invention

[0006] The present application provides a method for recovering compacted ore in the mining area, which can safely and reliably recover the compacted ore in the mining area when the ore pile is compacted during the recovery process. The method has the effect of quickly and effectively crushing and recovering the compacted ore, improving the recovery efficiency, and reducing safety accidents during the operation, protecting the safety of equipment and personnel, and reducing safety risks.

[0007] To achieve the above technical objectives, the core technical solution adopted in this application is a method for recovering compacted ore, including a remote-controlled scraper, a horizontal V-shaped trench, a flat-bottomed ore collection lane and an upper stope transportation lane; the remote-controlled scraper is used to enter the mine lane to recover the compacted ore; the bottom of the horizontal V-shaped trench, the flat-bottomed ore collection lane and the upper stope transportation lane are located on the same horizontal plane; the bottom of the horizontal V-shaped trench is connected to the flat-bottomed ore collection lane, and the flat-bottomed ore collection lane is vertically connected to the upper stope transportation lane; an ore discharge transportation lane, a bottom ore discharge route and an ore receiving funnel are also provided; the specific method is as follows:

[0008] The first step is to set the ore transport tunnel below the upper stope transport tunnel and in the same direction as the upper stope transport tunnel;

[0009] The second step is to set the bottom mining access road just below the flat bottom mining tunnel and in the same direction as the flat bottom mining tunnel;

[0010] The third step is to set up an ore receiving funnel under the horizontal V-shaped trench to connect the horizontal V-shaped trench with the bottom ore outlet. The ore receiving funnel is used to receive the compacted ore that falls by its own weight in the horizontal V-shaped trench.

[0011] The fourth step is to use a remote-controlled scraper to recover and transport the ore that has fallen into the receiving hopper through the bottom mining access road.

[0012] Furthermore, based on the above core technical solution, in the first step, the ore transport tunnel adopts the existing tunnel located below the upper mining area transport tunnel.

[0013] Furthermore, based on the above core technical solution, in the second step, the length of the bottom mining access road is determined according to the distance between the position of the compacted ore pile in the flat-bottom mining collection tunnel and the upper mining field transportation tunnel, and the cross-section of the bottom mining access road is set to 4m×3.5m.

[0014] Furthermore, based on the above core technical solution, in the second step, the distance between the top plate of the bottom mining access road and the bottom plate of the flat-bottomed mining tunnel is in the range of 5-7m.

[0015] Furthermore, based on the above core technical solution, in the third step, multiple ore receiving funnels are set up; combined with the fourth step, a ore receiving funnel that is farther away from the mine transportation tunnel is constructed first, and after the ore in the ore receiving funnel is recovered, a ore receiving funnel that is closer to the mine transportation tunnel is constructed.

[0016] Furthermore, based on the above core technical solution, in the third step, the ore-receiving funnel is a trapezoidal funnel, and the construction method is as follows: first, a vertical primary well-forming hole and a fan-shaped expansion slot hole for assisting in the expansion of the well are constructed in the direction of the flat-bottomed ore collecting tunnel in the bottom ore-discharging access road, located directly below the compacted ore pile; then, the primary well-forming hole is blasted to complete the primary well-forming, and a blasting free surface is formed after the ore is discharged; finally, the fan-shaped expansion slot hole is blasted again to form the ore-receiving funnel.

[0017] Furthermore, based on the above technical solution, the wellbore is not penetrated in one step, and a safety distance of 0.3-0.5m is reserved from the flat-bottomed mining tunnel.

[0018] Furthermore, based on the above technical solution, three rows of vertical holes are arranged in the fan-shaped expansion slots in the area close to the primary well formation, and the spacing between the vertical holes and the primary well formation and the spacing between the holes are both 1.4-1.8m.

[0019] Furthermore, based on the above technical solution, the lower opening of the ladder-shaped funnel is a rectangle of 8m×4m, and the upper opening is a rectangle of 14m×4m, and the height is equal to the distance from the top plate of the bottom mining access road to the bottom plate of the flat-bottomed mining tunnel.

[0020] Furthermore, based on the above technical solution, the side hole inclination angle range of the fan-shaped expansion slot hole is 50°-55°.

[0021] Beneficial Effects

[0022] It can be seen from the above technical solutions that the technical solution of the present invention provides a specially designed ore discharge and transportation laneway, a bottom ore discharge route and an ore receiving funnel, which can improve the recovery efficiency of the ore stored in the ore storage hole and reduce the safety risk. For example, using the existing laneway as the ore discharge and transportation laneway can reduce additional excavation work, reduce construction costs and time, and reduce the impact on the stability of the mine. The length of the bottom ore discharge route is accurately determined according to the position of the ore pile, which can ensure the accuracy and efficiency of the construction. The length and cross-sectional dimensions of the bottom ore discharge route are 4m×3.5m, which provides sufficient space for the transportation of ore and ensures smooth transportation. The distance range between the top plate of the bottom ore discharge route and the bottom plate of the flat bottom ore collection lane is maintained at a distance of 5-7m, which can ensure the stability of the bottom ore discharge route and provide sufficient operating space for subsequent blasting and ore recovery. The setting of multiple ore receiving funnels, first constructing the ore receiving funnel far away from the ore discharge and transportation laneway, and using a step-by-step backward method to promote the recovery work, reduces the impact on the stability of the mine, and improves the flexibility and safety of the construction. The design and construction method of the trapezoidal receiving ore funnel can effectively receive and guide the falling of the compacted ore. The hole of the well is not penetrated at one time and a safety distance of 0.3-0.5m is retained to prevent damage to the flat-bottomed ore collecting tunnel during blasting, ensure construction safety, and reduce the impact on the stability of the mine. The arrangement of the fan-shaped expansion slot holes can improve the blasting efficiency, ensure the formation of the receiving ore funnel, and maintain the stability of the tunnel. The side hole design angle of the fan-shaped expansion slot hole should be greater than the natural repose angle of 45°, and the inclination angle range should be between 50°-55°, so that it is conducive to the self-sliding of the ore after formation, so as to improve the ore recovery efficiency.

[0023] The beneficial effects of these technical features are mainly reflected in improving ore recovery efficiency, reducing construction costs, ensuring construction safety, reducing the impact on mine stability, and improving the smoothness of ore transportation. Through these innovative designs and construction methods, the recovery problem of hardened ore can be effectively solved and efficient utilization of resources can be achieved.

[0024] It should be appreciated that all combinations of the foregoing concepts, as well as additional concepts described in greater detail below, may be considered to be part of the inventive subject matter of the present disclosure, provided such concepts are not mutually inconsistent.

[0025] The foregoing and other aspects, embodiments and features of the present invention can be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as the features and / or beneficial effects of the exemplary embodiments, will be apparent from the following description or learned from the practice of the specific embodiments according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For clarity, not every component is labeled in every figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, in which:

[0027] Figure 1 A principle diagram of an embodiment is shown.

[0028] In the figure: 1. Remote-controlled scraper; 2. Horizontal V-shaped trench; 3. Flat-bottomed ore collection tunnel; 4. Upper mining area transportation tunnel; 5. Ore discharge transportation tunnel; 6. Bottom ore discharge access road; 7. Ore receiving funnel. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with ordinary skills in the field to which the present invention belongs.

[0030] Definition of terms:

[0031] Remote-controlled loaders are highly automated construction machinery used in mines, tunnels and other environments that require remote operation. Through remote control technology, these machines can complete heavy material handling tasks while reducing risks to personnel.

[0032] "V-shaped trench": a bottom structure used in mining, its characteristic is that its shape is similar to the letter "V", that is, a trench that is wide at the top and narrow at the bottom. This design helps to concentrate and guide the flow of ore to a specific area for easy collection and transportation of ore.

[0033] "Residual ore" refers to the ore that remains in the mining area and cannot be completely released after the mining area is released during the mining process, especially in underground mining. It is also called residual ore.

[0034] Embodiment 1:

[0035] like Figure 1As shown, a method for recovering compacted ore in the mines includes a remote-controlled scraper 1, a horizontal V-shaped trench 2, a flat-bottomed ore collection tunnel 3, and an upper mine transportation tunnel 4; the remote-controlled scraper 1 is used to enter the mine tunnel to recover the compacted ore in the mines; the bottom of the horizontal V-shaped trench 2, the flat-bottomed ore collection tunnel 3, and the upper mine transportation tunnel 4 are located on the same horizontal plane; the bottom of the horizontal V-shaped trench 2 is connected to the flat-bottomed ore collection tunnel 3, and the flat-bottomed ore collection tunnel 3 is vertically connected to the upper mine transportation tunnel 4; an ore discharge transportation tunnel 5, a bottom ore discharge route 6, and an ore receiving funnel 7 are also provided; the recovery efficiency of the compacted ore in the mines can be improved, while reducing safety risks. The specific method is:

[0036] The first step is to set the ore-exiting transportation tunnel 5 below the upper mining field transportation tunnel 4, in the same direction as the upper mining field transportation tunnel 4; the ore-exiting transportation tunnel 5 adopts the existing tunnel located below the upper mining field transportation tunnel 4. If the existing tunnel is used as the ore-exiting transportation tunnel 5, additional excavation work can be reduced, construction costs and time can be reduced, and the impact on mine stability can be reduced.

[0037] In the second step, the bottom mining access road 6 is set just below the flat-bottomed mining tunnel 3 and in the same direction as the flat-bottomed mining tunnel 3; the length of the bottom mining access road 6 is determined according to the distance between the position of the compacted ore pile in the flat-bottomed mining tunnel 3 and the upper mining field transportation tunnel 4, and the length of the bottom mining access road 6 is accurately determined according to the position of the compacted ore pile, which can ensure the accuracy and efficiency of the construction; the cross-section of the bottom mining access road 6 is set to 4m×3.5m, which provides sufficient space for the transportation of ore and ensures smooth transportation; the distance between the top plate of the bottom mining access road 6 and the bottom plate of the flat-bottomed mining tunnel 3 is in the range of 5-7m, which can ensure the stability of the bottom mining access road 6 and provide sufficient operating space for subsequent blasting and ore recovery.

[0038] In the third step, the receiving ore funnel 7 is set below the horizontal V-shaped trench 2, and the horizontal V-shaped trench 2 is connected to the bottom ore outlet 6. The receiving ore funnel 7 is used to receive the hardened ore falling by its own weight in the horizontal V-shaped trench 2; the receiving ore funnel 7 is a trapezoidal funnel, and the design and construction method of the trapezoidal receiving ore funnel 7 can effectively receive and guide the hardened ore to fall. The construction method is: first, in the bottom ore outlet 6, directly below the hardened ore pile, a vertical primary well hole and a fan-shaped expansion slot hole for assisting in the expansion of the well are constructed in the direction of the flat-bottomed ore collection lane 3; then, the primary well hole is blasted to complete the primary well, and a blasting free surface is formed after the ore is discharged; finally, the fan-shaped expansion slot hole is blasted to form the receiving ore funnel 7. The first well hole is not through, and a safe distance of 0.3-0.5m is reserved from the flat bottom mine collection tunnel 3, which can prevent damage to the flat bottom mine collection tunnel 3 during blasting, ensure construction safety, and reduce the impact on mine stability. The fan-shaped expansion slot hole is set with 3 rows of vertical holes in the area close to the first well, and the spacing between the vertical holes and the first well and the hole spacing are 1.4-1.8m. The lower mouth of the ladder funnel is a rectangle of 8m×4m, and the upper mouth is a rectangle of 14m×4m, with a height equal to the distance from the top plate of the bottom mine access road 6 to the bottom plate of the flat bottom mine collection tunnel 3. The side hole inclination angle of the fan-shaped expansion slot hole ranges from 50° to 55°. The arrangement of the fan-shaped expansion slot hole can improve the blasting efficiency, ensure the formation of the ore receiving funnel 7, and maintain the stability of the tunnel. The side hole design angle of the fan-shaped expansion slot hole should be greater than the natural repose angle of 45°, so that it is conducive to the self-sliding of the ore after formation, so as to improve the ore recovery efficiency.

[0039] The fourth step is to use the remote-controlled scraper 1 to recover and transport the ore falling from the ore receiving hopper 7 through the bottom ore outlet passage 6.

[0040] The beneficial effects of the method for recovering the ore in the plated hole are mainly reflected in improving the ore recovery efficiency, reducing the construction cost, ensuring the construction safety, reducing the impact on the stability of the mine and improving the smoothness of ore transportation. Through these innovative designs and construction methods, the problem of recovering the ore in the plated hole can be effectively solved and the efficient use of resources can be achieved.

[0041] Embodiment 2:

[0042] Based on the first embodiment, the present embodiment has the following additional technical features: in the third step, a plurality of ore receiving funnels 7 are provided, as follows:

[0043] A method for recovering compacted ore in the mine, comprising a remote-controlled scraper 1, a horizontal V-shaped trench 2, a flat-bottomed ore collection tunnel 3 and an upper mine transportation tunnel 4; the remote-controlled scraper 1 is used to enter the mine tunnel to recover the compacted ore in the mine; the bottom of the horizontal V-shaped trench 2, the flat-bottomed ore collection tunnel 3 and the upper mine transportation tunnel 4 are located on the same horizontal plane; the bottom of the horizontal V-shaped trench 2 is connected to the flat-bottomed ore collection tunnel 3, and the flat-bottomed ore collection tunnel 3 is vertically connected to the upper mine transportation tunnel 4; an ore discharge transportation tunnel 5, a bottom ore discharge route 6 and an ore receiving funnel 7 are also provided; the recovery efficiency of the compacted ore in the mine can be improved, while reducing safety risks. The specific method is:

[0044] The first step is to set the ore-exiting transportation tunnel 5 below the upper mining field transportation tunnel 4, in the same direction as the upper mining field transportation tunnel 4; the ore-exiting transportation tunnel 5 adopts the existing tunnel located below the upper mining field transportation tunnel 4. If the existing tunnel is used as the ore-exiting transportation tunnel 5, additional excavation work can be reduced, construction costs and time can be reduced, and the impact on mine stability can be reduced.

[0045] In the second step, the bottom mining access road 6 is set just below the flat-bottomed mining tunnel 3 and in the same direction as the flat-bottomed mining tunnel 3; the length of the bottom mining access road 6 is determined according to the distance between the position of the compacted ore pile in the flat-bottomed mining tunnel 3 and the upper mining field transportation tunnel 4, and the length of the bottom mining access road 6 is accurately determined according to the position of the compacted ore pile, which can ensure the accuracy and efficiency of the construction; the cross-section of the bottom mining access road 6 is set to 4m×3.5m, which provides sufficient space for the transportation of ore and ensures smooth transportation; the distance between the top plate of the bottom mining access road 6 and the bottom plate of the flat-bottomed mining tunnel 3 is in the range of 5-7m, which can ensure the stability of the bottom mining access road 6 and provide sufficient operating space for subsequent blasting and ore recovery.

[0046] In the third step, the ore receiving funnel 7 is arranged below the horizontal V-shaped trench 2 to connect the horizontal V-shaped trench 2 with the bottom ore outlet passage 6. The ore receiving funnel 7 is used to receive the compacted ore falling by its own weight in the horizontal V-shaped trench 2. The ore receiving funnel 7 is a trapezoidal funnel. The design and construction method of the trapezoidal ore receiving funnel 7 can effectively receive and guide the compacted ore to fall. The construction method is as follows: first, the position of the remote-controlled horizontal agglomerated ore pile is determined by a total station, and the position is located directly below the agglomerated ore pile in the bottom ore-exiting access road 6. The CYTC76 medium-deep hole trolley is used to construct the vertical primary well-forming hole and the fan-shaped expansion slot hole used to assist in the expansion of the well-forming in the direction of the flat-bottomed ore-collecting tunnel 3; then, the primary well-forming hole is blasted to complete the primary well-forming, and a blasting free surface is formed after the ore is discharged; finally, the fan-shaped expansion slot hole is blasted again to form an ore-receiving funnel 7, and the space of the ladder-shaped ore-receiving funnel 7 is used to receive the agglomerated ore that falls by its own weight in the upper V-shaped trench. The primary well-forming hole is not through-hole, and a safe distance of 0.3-0.5m is reserved from the flat-bottomed ore-collecting tunnel 3, which can prevent damage to the flat-bottomed ore-collecting tunnel 3 during blasting, ensure construction safety, and reduce the impact on mine stability. The fan-shaped hole of the auxiliary expansion slot is composed of two parts. The area near the primary well is a vertical hole. The fan-shaped expansion slot hole is set with 3 rows of vertical holes in the area near the primary well. The vertical hole is a medium-deep hole. The distance from the primary well and the row spacing are both 1.4m. It can be appropriately increased according to the rock conditions of the mine roadway, not more than 1.8m (when the row spacing is increased, the number of vertical line holes can be appropriately reduced); the hole spacing is also 1.4-1.8m. Among them, the ladder funnel blasting adopts a secondary blasting forming method. The order is to blast the primary well first to form the expansion slot space and empty the ore in the well, and then blast the fan-shaped auxiliary hole to form the final T-shaped funnel. The lower opening of the ladder funnel is a rectangle of 8m×4m, and the upper opening is a rectangle of 14m×4m. The height is equal to the distance from the top plate of the bottom mine access road 6 to the bottom plate of the flat bottom mine collection road 3. The side hole inclination angle range of the fan-shaped expansion slot hole is 50°-55°. The arrangement of the fan-shaped expansion slot holes can improve the blasting efficiency, ensure the formation of the ore receiving funnel 7, and maintain the stability of the tunnel. The side hole design angle of the fan-shaped expansion slot hole should be greater than the natural repose angle of 45°, so that it is conducive to the self-sliding of the ore after formation, so as to improve the ore recovery efficiency.

[0047] In the third step, multiple receiving hoppers 7 are provided to adapt to the situation when the range of the compacted ore pile is relatively long; combined with the fourth step, a remote-controlled shovel loader 1 is used to pass through the bottom ore-exiting access road 6, and first construct a receiving hopper 7 that is farther away from the ore-exiting transportation laneway 5, and after the ore in the receiving hopper 7 is recovered and transported away; then a receiving hopper 7 that is closer to the ore-exiting transportation laneway 5 is constructed, and the ore that falls in the receiving hopper 7 is recovered and transported away. The compacted ore is recovered by forming a trapezoidal funnel one by one in a backward manner toward the ore-exiting laneway until the trapezoidal funnel closest to the ore-exiting laneway is recovered. The provision of multiple receiving hoppers 7, first constructing the receiving hopper 7 that is farther away from the ore-exiting transportation laneway 5, can gradually advance the recovery work in a backward manner, reduce the impact on the stability of the mine, and improve the flexibility and safety of the construction.

[0048] The beneficial effects of the method for recovering the ore in the plated hole are mainly reflected in improving the ore recovery efficiency, reducing the construction cost, ensuring the construction safety, reducing the impact on the stability of the mine and improving the smoothness of ore transportation. Through these innovative designs and construction methods, the problem of recovering the ore in the plated hole can be effectively solved and the efficient use of resources can be achieved.

[0049] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. A method for recovering compacted ore, comprising a remote-controlled scraper (1), a horizontal V-shaped trench (2), a flat-bottomed ore collection lane (3) and an upper stope transportation lane (4); the remote-controlled scraper (1) is used to enter the mine lane to recover the compacted ore; the bottom of the horizontal V-shaped trench (2), the flat-bottomed ore collection lane (3) and the upper stope transportation lane (4) are located on the same horizontal plane; the bottom of the horizontal V-shaped trench (2) is connected to the flat-bottomed ore collection lane (3), and the flat-bottomed ore collection lane (3) is vertically connected to the upper stope transportation lane (4); characterized in that: A mine transport tunnel (5), a bottom mine access (6) and an ore receiving hopper (7) are also provided; the specific method is as follows: The first step is to arrange the ore-exiting transport lane (5) below the upper stope transport lane (4) in the same direction as the upper stope transport lane (4); In the second step, the bottom ore outlet passage (6) is arranged directly below the flat bottom ore collecting tunnel (3) and in the same direction as the flat bottom ore collecting tunnel (3); In the third step, the ore receiving funnel (7) is arranged below the horizontal V-shaped trench (2) to connect the horizontal V-shaped trench (2) with the bottom ore outlet passage (6), and the ore receiving funnel (7) is used to receive the compacted ore that falls by its own weight in the horizontal V-shaped trench (2). The fourth step is to use the remote-controlled scraper (1) to recover and transport the ore falling from the ore receiving hopper (7) through the bottom ore outlet passage (6).

2. The method for recovering compacted ore according to claim 1, characterized in that: In the first step, the ore transport tunnel (5) adopts the existing tunnel located below the upper stope transport tunnel (4).

3. The method for recovering compacted ore according to claim 1, characterized in that: In the second step, the length of the bottom ore discharge passage (6) is determined according to the distance between the position of the compacted ore pile in the flat-bottom ore collection tunnel (3) and the upper mining field transportation tunnel (4), and the cross-section of the bottom ore discharge passage (6) is set to 4m×3.5m.

4. The method for recovering compacted ore according to claim 1, characterized in that: In the second step, the distance between the top plate of the bottom ore-exiting access road (6) and the bottom plate of the flat-bottomed ore-collecting tunnel (3) is in the range of 5-7 m.

5. The method for recovering compacted ore according to claim 1, characterized in that: In the third step, a plurality of ore receiving funnels (7) are provided; combined with the fourth step, the ore receiving funnel (7) which is farther from the ore discharge transport tunnel (5) is constructed first, and after the ore in the ore receiving funnel (7) is recovered, the ore receiving funnel (7) which is closer to the ore discharge transport tunnel (5) is constructed.

6. The method for recovering compacted ore according to claim 1, characterized in that: In the third step, the ore receiving funnel (7) is a trapezoidal funnel, and the construction method is as follows: first, a vertical primary well-forming hole and a fan-shaped expansion slot hole for assisting in well-forming are constructed in the bottom ore-exiting access road (6) directly below the compacted ore pile, upward toward the flat-bottomed ore-collecting tunnel (3); then, the primary well-forming hole is blasted to complete the primary well-forming, and a blasting free surface is formed after the ore is discharged; finally, the fan-shaped expansion slot hole is blasted again to form the ore receiving funnel (7).

7. The method for recovering compacted ore according to claim 6, characterized in that: The primary well borehole is not through-going and a safety distance of 0.3-0.5 m is reserved from the flat-bottomed ore collecting tunnel (3).

8. The method for recovering compacted ore according to claim 6, characterized in that: The fan-shaped expansion slot holes are provided with three rows of vertical holes in the area close to the primary well formation, and the spacing between the vertical holes and the primary well formation and the spacing between the holes are both 1.4-1.8m.

9. The method for recovering compacted ore according to claim 6, characterized in that: The lower opening of the ladder-shaped funnel is a rectangle of 8m×4m, and the upper opening is a rectangle of 14m×4m, and the height is equal to the distance from the top plate of the bottom ore outlet passage (6) to the bottom plate of the flat-bottom ore collecting tunnel (3).

10. The method for recovering compacted ore according to claim 6, characterized in that: The side hole inclination angle range of the fan-shaped expansion slot hole is 50°-55°.

Images