Mining method for floor high-grade ore body under cemented filling body

Abstract

The invention relates to a method for mining a floor high-grade ore body under a cemented filling body, which comprises the following steps of: S1, mining preparation: arranging a mining preparation slope ramp and an outside-vein ore discharge roadway along a vein on a footwall of the ore body, and arranging a ventilation system which comprises an air return raise and a ventilation unit so as to meet the operation ventilation requirement; according to the method, hydraulic props are adopted for supporting the top of the mining access road, safety in the mining process is ensured, meanwhile, the metal hydraulic props are recycled through retreating type recycling equipment, the mining cost is remarkably reduced, the recovery rate is increased, the mining access road is reasonably arranged, efficient combined operation of an underground carry-scraper and a mining truck is combined, and the mining efficiency is improved. According to the mining method, the high-strength alloy steel coating anti-corrosion hydraulic prop and the advanced three-dimensional visual monitoring technology are adopted, the ore rock transportation progress and equipment operation parameters can be monitored in real time, the overall mining efficiency is improved, in addition, the high-strength alloy steel coating anti-corrosion hydraulic prop and the refined filling technology are adopted, and the ore body supporting stability is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of mining ore bodies, and in particular to a method for mining high-grade ore bodies on floor slabs under a cemented filling body. Background Art

[0002] "Floor" ore bodies are usually formed when early investment and early benefits are seen. This is because a layer of high-grade ore bodies shaped like a "floor" is reserved when the thick and large ore bodies are mined from top to bottom in the early stage of mine production and from bottom to top in the later stage.

[0003] In the actual implementation process, in the vertical direction, the upper and lower parts of the "floor" ore body are both filling bodies after mining and filling. At present, the mining of the "floor" ore body usually adopts the approach type and every three mining methods. A large amount of support is required in the upward approach mining. Since the support cannot be recovered, the mining cost is high. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In order to solve the above problems in the prior art, the present invention provides a method for mining high-grade ore bodies on the floor under the cemented filling body, which solves the problems that a large amount of support is required in the upward approach mining, and the mining cost is high because the support cannot be recovered.

[0006] (II) Technical solution

[0007] In order to achieve the above object, the main technical solutions adopted by the present invention are:

[0008] A method for mining a high-grade ore body on a floor slab under a cemented filling body comprises the following steps:

[0009] S1 Mining: Arrange mining ramps and mine exit tunnels along the vein outside the vein in the footwall of the ore body, and set up ventilation systems, including return air shafts and ventilation units, to meet the ventilation needs of the operation;

[0010] S2 mining: The mining route is arranged vertically along the ore body. Hydraulic props are used to support the top of the mining route, and the prop spacing is arranged according to the mechanical properties of the rock mass. During the mining process, underground loaders are used to transport ore and rocks to mining trucks, and then lifted to the ground through the underground transportation system.

[0011] S3 Hydraulic prop recovery: Use prop recovery equipment to gradually dismantle the hydraulic prop, use backward traction to adjust the direction through the guide pulley, transport the prop to the designated location, and finally use the winch to pull it to the loading platform;

[0012] S4 closed access: Implement multi-layer closure on the mining access that has been mined. The outer layer is filled with high-strength concrete slurry, and the inner layer is filled with expansion cementing material to enhance the stability of the goaf;

[0013] S5 repeated mining: follow steps S2 to S4 in sequence to complete the mining of the floor slab ore body section by section.

[0014] The slope of the mining ramp is designed to be 8% to 12%, and the width meets the passage requirements of underground shovel loaders and mining vehicles. The vein exit tunnel outside the vein maintains a minimum safe distance from the ore body boundary to reduce the amount of waste rock mined.

[0015] The arrangement of the mining approach is based on the rock conditions of the ore body roof and the thickness of the cementing body. The arrangement density and spacing of the hydraulic props are determined through mechanical calculations. The supporting hydraulic props are made of high-strength alloy steel and are coated with an anti-corrosion coating on the surface.

[0016] The pillar recovery equipment includes a hydraulic traction device, a guide pulley and a winch system. The pillar recovery adopts a backward method and uses a special track to achieve controlled sliding to avoid damage to the pillar during the recovery process.

[0017] A cushion material is provided in the contact area between the top of the mining access road and the hydraulic support to reduce the stress concentration on the roof;

[0018] After the support is completed, the stress status of the pillar is monitored in real time through sensors, and the monitoring data is wirelessly transmitted to the ground control center.

[0019] The filling material is a three-component cement-based cement paste, in which an early strength agent is added to accelerate the curing, and a high-pressure pump is used for compaction;

[0020] During the filling process, vibration equipment is used to ensure that the material is evenly distributed without voids.

[0021] After the filling operation is completed, non-destructive testing is performed on the cemented body to evaluate the stability of the filling body;

[0022] Closed monitoring technology is used to conduct long-term monitoring of the cemented body in the goaf to ensure that the mechanical state meets safety requirements.

[0023] The ventilation system includes main airflow and local airflow zoning control, forming a closed loop with the ventilation unit through the return air well;

[0024] The system is equipped with an automatic monitoring device to record wind speed, wind pressure and harmful gas concentration in real time.

[0025] During the ore and rock transportation process, underground loaders and mining trucks work in conjunction with a centralized dispatching system, and are combined with a three-dimensional visual monitoring system to record ore and rock volume, equipment operating parameters, and mining progress in real time.

[0026] During the repeated mining stage, the hydraulic support layout parameters are dynamically adjusted after each operation is completed, and the support spacing and layout plan are optimized based on the geological model to adapt to the rock conditions in different areas. At the same time, blasting piles are used in the mining approach to remove excess waste rock or unstable rock formations in the tunnel or mining path through controlled blasting operations, thereby improving mining efficiency, ensuring the stability of the support area, and reducing transportation risks.

[0027] (III) Beneficial effects

[0028] The beneficial effects of the present invention are as follows: the method adopts hydraulic props for top support of the mining approach, ensuring the safety of the mining process, and at the same time recovers the metal hydraulic props through the backward recovery equipment, which significantly reduces the mining cost and improves the recovery rate. The mining approach is reasonably arranged, combined with the efficient joint operation of underground shovel loaders and mining vehicles, and advanced three-dimensional visualization monitoring technology, which helps to monitor the progress of ore and rock transportation and equipment operating parameters in real time, and improve the overall mining efficiency. In addition, the use of high-strength alloy steel coated anti-corrosion hydraulic props and refined filling technology enhances the stability of ore body support. At the same time, modern monitoring technology is used to track the stability of the cementing body for a long time to ensure safe production. The entire process not only improves the recovery efficiency and reduces costs, but also effectively improves the construction safety and resource recovery rate, and has significant economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a plan view of the mining method of the present invention.

[0030] Figure 2 The present invention Figure 1 Center section view.

[0031] Figure 3 It is a side view of mining the floor slab ore body under the underground cemented body of the present invention.

[0032] Figure 4 It is a side view of the hydraulic prop recovery after mining of the floor slab ore body under the underground cementing body of the present invention;

[0033] Figure 5 It is a schematic diagram of the process of the mining method of the present invention.

[0034] [Description of Reference Numerals]

[0035] 1. Mining ramp; 2. Mine exit tunnel outside the vein; 3. Mining approach; 4. Hydraulic support; 5. Underground scraper; 6. Floor ore body; 7. Explosion pile; 8. Mining truck; 9. Support recovery equipment; 10. Return air shaft. DETAILED DESCRIPTION

[0036] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0037] Please refer to Figures 1 to 5 As shown, the method for mining high-grade ore bodies on the floor slab under the cemented filling body of the present invention comprises the following steps:

[0038] S1 Mining: Arrange a mining ramp 1 and a mine exit tunnel 2 along the vein outside the vein in the footwall of the ore body, and set up a ventilation system, including a return air shaft 10 and a ventilation unit, to meet the ventilation needs of the operation;

[0039] S2 mining: a mining route 3 is arranged vertically along the ore body, a hydraulic support 4 is used to support the top of the mining route 3, and the support spacing is arranged according to the mechanical properties of the rock mass; during the mining process, an underground scraper 5 is used to transport the ore and rock to a mining truck 8, and the ore and rock are lifted to the ground through an underground transportation system;

[0040] S3 Recovery of hydraulic prop 4: Use prop recovery equipment 9 to gradually dismantle the hydraulic prop 4, adopt backward traction mode, adjust the direction through guide pulley, transport the prop to the designated position, and finally tow it to the loading platform by winch;

[0041] S4 closed approach: Implement multi-layer closure on the mining approach 3 that has been mined. The outer layer is filled with high-strength concrete slurry, and the inner layer is filled with expansion cementing material to enhance the stability of the goaf;

[0042] S5 repeated mining: operate in sequence according to steps S2 to S4 to complete the mining of the floor ore body 6 in sections. In the actual implementation process, in the S1 mining stage, by arranging the mining ramp 1 and the vein exit tunnel 2 outside the vein, and setting the return air skylight 10 and the ventilation unit, a closed-loop ventilation system is formed to meet the ventilation conditions required for underground operations. Then, based on the structural characteristics of the ore body, a reasonable underground passage is set to ensure a safe and stable working environment. In the S2 mining stage, the mining approach 3 is arranged according to the vertical ore body direction, and the top of the mining approach 3 is supported by hydraulic pillars 4. The layout density and spacing of the hydraulic pillars 4 are optimized and designed through mechanical calculations to enhance the safety of the ore body. At the same time, underground shovel loaders 5 are used to transport the ore and rock to the mining car 8, and the ore and rock are lifted to the ground through the underground transportation system to ensure the continuity and efficiency of the transportation process. In the S3 hydraulic pillar 4 recovery stage, the backward recovery technology is adopted. Through the hydraulic traction device, guide pulley and rope system, the hydraulic pillar 4 is gradually recovered and moved to the designated recovery position to avoid damage during the recovery process, while saving time and cost. In the S4 closed approach stage, multi-layer closure is implemented for the area where the mining has been completed, and the outer layer is supported by high-strength Concrete slurry filling, the inner layer uses expansion cementing material to enhance the stability of the goaf and ensure long-term safety. In the entire mining workflow, real-time monitoring technology plays an important role. By arranging buffer pads in the contact area of ​​the hydraulic support 4, stress concentration is reduced; sensors are used to detect the stress state of the support in real time, and the data is wirelessly transmitted to the ground control center for analysis to ensure the safety and stability of the support. In addition, in order to ensure the quality of filling, a three-component cement-based cementing slurry is used and an early strength agent is added. It is compacted by a high-pressure pump, and vibration equipment is used to ensure that the filling is evenly distributed and has no gaps. After the cementing body is completed, non-destructive testing is performed, and its mechanical stability is continuously evaluated in combination with closed-loop monitoring technology to ensure long-term safety. At the same time, the ore and rock transportation system realizes joint operations through centralized scheduling and three-dimensional visualization monitoring technology, and monitors the ore and rock volume, equipment operating parameters and mining progress in real time to further optimize the mining efficiency. In the repeated mining stage, after each mining, the layout plan of the hydraulic support 4 is dynamically adjusted based on the geological model to adapt to different geological conditions and ensure the flexibility and adaptability of the entire mining process.

[0043] Through the above experiments, each experiment is recorded and an experimental table is generated. The experimental table aims to evaluate the safety, feasibility and efficiency of mine mining and mining-related technologies through a series of experiments. It covers the overall workflow from mining route layout to hydraulic support recovery, ore and rock transportation, closed route quality and ventilation system, ensuring that each technical solution and process design can meet the actual operation needs and ensure operation safety.

[0044]

[0045]

[0046]

[0047] This experimental table comprehensively evaluates the safety, feasibility and efficiency of mine mining and recovery related technologies through a series of systematic experiments, focusing on the overall workflow from mining access 3 layout, hydraulic support 4 recovery, ore and rock transportation, closed access quality assessment to ventilation system. The following is a detailed summary of the experimental results:

[0048] 1. Mining route 3 layout assessment

[0049] The experiment optimized the layout density and spacing of the hydraulic props 4 by mechanical calculation based on the rock conditions of the ore body roof and the thickness of the cementing body. The results showed that the reasonable layout of the hydraulic props 4 not only effectively enhanced the stability of the ore body support, but also ensured the overall safety of the tunnel. By adjusting the layout plan, the prop parameters can be dynamically adjusted according to the rock conditions in different areas, improving flexibility and adaptability.

[0050] 2. Feasibility of the recovery process of hydraulic prop 4

[0051] The experiment adopted the backward recovery technology, using a hydraulic traction device, a guide pulley and a rope system to recover the pillars. The results verified that this recovery method has the advantages of high safety and high efficiency, avoiding deformation or damage during the recovery process of the pillars. The entire recovery path is stable and reliable, while saving recovery costs and time.

[0052] 3. Safety and efficiency assessment of ore and rock transportation processes

[0053] In the experiment, the centralized dispatching system and three-dimensional visualization monitoring technology were used to monitor the transportation process of underground shovel loaders 5 and mining trucks 8 in real time. The results showed that the system can effectively record the ore and rock transportation volume, equipment operating parameters and mining progress, effectively improving the continuity and efficiency of ore and rock transportation, while ensuring the safe operation of the equipment.

[0054] 4. Closed access quality assessment

[0055] The closed access experiment used a multi-layer sealing technology, with the outer layer filled with high-strength concrete slurry and the inner layer filled with expansion cementing material. The experimental results showed that this multi-layer sealing technology effectively enhanced the long-term stability of the goaf, reduced the risk of geological disasters caused by goaf, and ensured the safety of underground operations.

[0056] 5. Analysis of ventilation system monitoring results

[0057] In the experiment, a return air shaft 10 and a ventilation unit were set up to form a closed loop, and an automatic monitoring device was also installed to monitor the wind speed, wind pressure and harmful gas concentration in real time. The results show that this ventilation system can effectively ensure smooth air circulation underground. At the same time, real-time monitoring data analysis shows that the concentration of harmful gases is maintained within a safe range, ensuring the safety of the mining operation environment.

[0058] 6. Assessment of cement quality and safety

[0059] The experiment used a three-component cement-based binder slurry, added an early strength agent for rapid curing, and used a high-pressure pump for delivery and vibration equipment to ensure uniform density. The experimental results showed that this filling technology significantly improved the filling quality of the binder and effectively prevented safety risks such as mine collapse. The long-term mechanical stability of the binder was further monitored in real time through non-destructive testing and closed-loop monitoring technology to ensure the long-term safety of the project.

[0060] Based on the experimental results, the various technical solutions of the entire mine mining workflow, including pillar layout, recovery, ore and rock transportation, ventilation system and closed access technology, have shown good safety, stability and feasibility. The various processes are coordinated with each other and can effectively meet the safety, efficiency and environmental requirements of actual mining operations.

[0061] Optionally, the slope of the mining ramp 1 is designed to be 8% to 12%, and the width meets the passage requirements of underground shovel loaders 5 and mining trucks 8. The mine tunnel 2 outside the vein maintains a minimum safe distance from the boundary of the ore body to reduce the amount of waste rock mined. In the actual implementation process, the slope of the mining ramp 1 is designed to be 8% to 12%. This design range has been optimized through engineering calculations and actual operational needs to ensure that the ramp has a reasonable slope to meet the operating requirements of underground shovel loaders 5 and mining trucks 8. A reasonable slope can not only ensure the smooth passage of vehicles, but also effectively reduce the mechanical burden during operation, avoid sliding or loss of control of vehicles on the ramp, and improve operational safety. At the same time, the width design of the ramp should also fully consider the passage requirements of underground shovel loaders 5 and mining trucks 8. The width design must meet the space requirements for the smooth passage of large transport vehicles to avoid transportation delays or accident risks caused by obstructed vehicle passage. In the actual implementation process , the rationality and smoothness of the width can be ensured through actual vehicle size measurement and engineering simulation analysis. In addition, a minimum safety distance needs to be maintained between the vein-outlet mining tunnel 2 and the ore body boundary to minimize the amount of waste rock mined. Reasonable setting of this safety distance can not only avoid random mining of waste rock and waste of resources, but also effectively improve work efficiency, while enhancing the stability of the tunnel and reducing the risk of geological disasters. In the actual implementation process, engineering and technical personnel determine the position and boundary safety distance of the vein-outlet mining tunnel 2 through geological surveys and actual ore body conditions assessments. This can ensure that only target ore body resources are taken during the mining process, avoiding unnecessary waste rock mining, saving costs and improving ore recovery rates.

[0062] Optionally, the arrangement of the mining access 3 is based on the rock conditions of the ore body roof and the thickness of the cementing body, and the arrangement density and spacing of the hydraulic pillars 4 are determined by mechanical calculations. The supporting hydraulic pillars 4 are made of high-strength alloy steel and coated with an anti-corrosion coating. In the actual implementation process, the arrangement of the mining access 3 is based on the rock conditions of the ore body roof and the thickness of the cementing body, and the arrangement density and spacing of the hydraulic pillars 4 are determined by mechanical calculations. The supporting hydraulic pillars 4 are made of high-strength alloy steel, which has excellent compressive resistance and durability. At the same time, they are coated with an anti-corrosion coating to effectively resist underground moisture and gas corrosion, ensure the stability and safety of the tunnel, extend the service life and reduce maintenance costs.

[0063] Optionally, the pillar recovery equipment 9 includes a hydraulic traction device, a guide pulley and a winch system. The pillar recovery adopts a backward method, and a special track is used to achieve controllable sliding to prevent the pillar from being damaged during the recovery process. In the actual implementation process, the pillar recovery equipment 9 includes a hydraulic traction device, a guide pulley and a winch system. The backward recovery method is used to achieve controllable sliding of the pillar through a special track to ensure that the recovery path is stable and reliable, and to prevent the pillar from being deformed or damaged during the recovery process. At the same time, the hydraulic traction device provides stable power, and the guide pulley assists the pillar to move smoothly, effectively improving the recovery efficiency, reducing the operation risk, and ensuring that the entire recovery process is safe, stable and controllable.

[0064] Optionally, a cushion material is provided in the contact area between the top of the mining access road 3 and the hydraulic support 4 to reduce the stress concentration of the roof;

[0065] After the support is completed, the stress state of the pillar is monitored in real time by sensors, and the monitoring data is wirelessly transmitted to the ground control center. In the actual implementation process, the buffer material is set in the contact area between the top of the mining access 3 and the hydraulic pillar 4, which can effectively disperse and reduce the stress concentration of the roof, enhance the stability and safety of the support system, and after the support is completed, the stress state of the hydraulic pillar 4 is monitored in real time by sensors, and the monitoring data is sent to the ground control center through the wireless transmission system, so that the remote real-time monitoring of the stress state of the pillar can be realized, abnormal conditions can be discovered in time, the mining operation can be ensured to be carried out safely, and data support can be provided for the maintenance and adjustment of the pillar.

[0066] Optionally, the filling material adopts a three-component cement-based cementitious slurry, an early strength agent is added to the slurry to accelerate the curing, and the slurry is compacted by a high-pressure pump;

[0067] During the filling process, vibration equipment is used to ensure that the material is evenly distributed and free of voids. In the actual implementation process, the filling material uses a three-component cement-based cementitious slurry, and an early strength agent is added to accelerate the curing speed to ensure that it is quickly and stably filled into the goaf. The slurry is transported by a high-pressure pump for compaction and effectively fills the voids in the mine. In order to ensure that the slurry is evenly distributed and free of voids, vibration equipment is used throughout the filling process to enhance the filling quality of the material and ensure the structural stability and safety of the goaf area.

[0068] Optionally, after the filling operation is completed, non-destructive testing is performed on the cemented body to evaluate the stability of the filling body;

[0069] Closed monitoring technology is used to monitor the cemented bodies in the goaf for a long time to ensure that the mechanical state meets safety requirements. In the actual implementation process, after the filling operation is completed, non-destructive testing is performed on the cemented bodies to evaluate whether their stability and quality meet the expected requirements. Through closed monitoring technology, long-term monitoring of the cemented bodies in the goaf is carried out to detect changes in their mechanical state in real time, ensure their long-term stability and safety, and prevent potential safety hazards.

[0070] Optionally, the ventilation system includes zoning control of the main airflow and the local airflow, forming a closed loop with the ventilation unit through the return air well 10;

[0071] The system is equipped with an automatic monitoring device to record wind speed, wind pressure and harmful gas concentration in real time. In the actual implementation process, the ventilation system adopts a combination of main wind flow and local wind flow zoning control, and forms a closed circulation loop with the return air well 10 and the ventilation unit to ensure smooth air circulation underground. The system is equipped with advanced automatic monitoring devices, which can record wind speed, wind pressure changes and harmful gas concentration in real time, provide data support, and ensure the safety of underground workers and the stability of the working environment.

[0072] Optionally, during the transportation of ore and rock, the underground shovel 5 and the mining truck 8 work in conjunction with each other through a centralized dispatching system, and in combination with a three-dimensional visualization monitoring system, record the amount of ore and rock, equipment operating parameters, and mining progress in real time. In the actual implementation process, during the transportation of ore and rock, the underground shovel 5 and the mining truck 8 achieve efficient joint operations through an advanced centralized dispatching system to ensure that the ore and rock are quickly and smoothly transported from the mining site to the designated location. At the same time, in combination with a three-dimensional visualization monitoring system, the ore and rock transportation volume, equipment operating status, and mining progress are recorded in real time, providing data support, optimizing the operation process, improving transportation efficiency, and ensuring the safe operation of equipment.

[0073] Optionally, in the repeated mining stage, after each operation is completed, the layout parameters of the hydraulic props 4 are dynamically adjusted, and the spacing and layout of the props are optimized based on the geological model to adapt to the rock mass conditions in different regions. At the same time, the blast pile 7 is used in the mining approach 3 to remove excess waste rock or unstable rock formations in the tunnel or mining path through controlled blasting operations, thereby improving mining efficiency, ensuring the stability of the prop support area, and reducing transportation risks. In the actual implementation process, in the repeated mining stage, after each operation is completed, the layout parameters of the hydraulic props 4 are dynamically adjusted according to the actual geological conditions and rock mass changes. By analyzing the geological model data, the spacing and layout of the props are optimized to better adapt to the rock mass characteristics of different regions, ensure the support effect, and improve safety and mining efficiency.

[0074] The above shows and describes the basic principles, main features and advantages of the present invention, and the standard parts used in the present invention can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0075] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for mining high-grade ore bodies on floor slabs under cemented filling bodies, characterized in that: The following steps are involved: S1 Mining: Arrange a mining ramp (1) and a mine exit tunnel (2) along the vein outside the ore body at the foot of the ore body, and set up a ventilation system, including a return air shaft (10) and a ventilation unit to meet the ventilation needs of the operation; S2 mining: a mining route (3) is arranged perpendicular to the direction of the ore body, hydraulic props (4) are used to support the top of the mining route (3), and the spacing between the props is arranged according to the mechanical properties of the rock mass; during the mining process, an underground shovel loader (5) is used to transport the ore and rock to a mining truck (8), and the ore and rock are lifted to the surface through an underground transportation system; S3 Recovery of the hydraulic prop (4): The hydraulic prop (4) is gradually dismantled using prop recovery equipment (9), and the prop is transported to a designated location by adjusting the direction through a guide pulley using a backward traction method, and finally towed to a loading platform by a winch; S4 Closed access: Implement multi-layer closure on the mining access (3) that has been mined. The outer layer is filled with high-strength concrete slurry, and the inner layer is filled with expansion cementing material to enhance the stability of the goaf; S5 Repeated mining: Perform operations in sequence according to steps S2 to S4 to complete the mining of the floor slab ore body (6) in sections.

2. The method for mining high-grade ore bodies on floor slabs under cemented filling bodies according to claim 1, characterized in that: The slope of the mining ramp (1) is designed to be 8% to 12%, and the width meets the passage requirements of underground shovel loaders (5) and mining vehicles (8). The vein exit tunnel (2) outside the vein maintains a minimum safe distance from the ore body boundary to reduce the amount of waste rock mined.

3. The method for mining high-grade ore bodies on floor slabs under cemented filling bodies according to claim 1, characterized in that: The arrangement of the mining access road (3) is based on the rock conditions of the ore body roof and the thickness of the cementing body. The arrangement density and spacing of the hydraulic props (4) are determined by mechanical calculation. The supporting hydraulic props (4) are made of high-strength alloy steel and coated with an anti-corrosion coating.

4. The method for mining high-grade ore bodies on floor slabs under cemented filling bodies according to claim 1, characterized in that: The pillar recovery equipment (9) comprises a hydraulic traction device, a guide pulley and a winch system. The pillar recovery adopts a backward method and uses a special track to achieve controllable sliding to avoid damage to the pillar during the recovery process.

5. The method for mining high-grade ore bodies on floor slabs under cemented filling bodies according to claim 1, characterized in that: A buffer material is provided in the contact area between the top of the mining access road (3) and the hydraulic support (4) to reduce the stress concentration of the roof; After the support is completed, the stress status of the pillar is monitored in real time through sensors, and the monitoring data is wirelessly transmitted to the ground control center.

6. The method for mining high-grade ore bodies on floor slabs under cemented filling bodies according to claim 1, characterized in that: The filling material is a three-component cement-based cement paste, in which an early strength agent is added to accelerate the curing, and a high-pressure pump is used for compaction; During the filling process, vibration equipment is used to ensure that the material is evenly distributed without voids.

7. The method for mining high-grade ore bodies on floor slabs under cemented filling bodies according to claim 1, characterized in that: After the filling operation is completed, non-destructive testing is performed on the cemented body to evaluate the stability of the filling body; Closed monitoring technology is used to conduct long-term monitoring of the cemented body in the goaf to ensure that the mechanical state meets safety requirements.

8. The method for mining high-grade ore bodies on floor slabs under cemented filling bodies according to claim 1, characterized in that: The ventilation system includes a main air flow and a local air flow zoning control, and forms a closed loop with the ventilation unit through the return air patio (10); The system is equipped with an automatic monitoring device to record wind speed, wind pressure and harmful gas concentration in real time.

9. The method for mining high-grade ore bodies on floor slabs under cemented filling bodies according to claim 1, characterized in that: During the ore and rock transportation process, the underground shovel loader (5) and the mining truck (8) work in conjunction with each other through a centralized dispatching system, and in combination with a three-dimensional visual monitoring system, the ore and rock quantity, equipment operating parameters and mining progress are recorded in real time.

10. The method for mining high-grade ore bodies on floor slabs under cemented filling bodies according to claim 1, characterized in that: During the repeated mining phase, the layout parameters of the hydraulic support (4) are dynamically adjusted after each operation is completed. The support spacing and layout plan are optimized based on the geological model to adapt to the rock conditions in different areas. At the same time, blasting piles (7) are used in the mining approach to remove excess waste rock or unstable rock formations in the tunnel or mining path through controlled blasting operations, thereby improving mining efficiency, ensuring the stability of the support support area, and reducing transportation risks.

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