Mining method for gently inclined medium-thickness ore body

Abstract

The invention relates to the technical field of mining methods, in particular to a mining method for a gently inclined medium-thick ore body. The invention provides a mining method for a gently inclined medium-thick ore body, which comprises the following steps: carrying out development project preset division on panels, strip groups, an air inlet roadway, an air return roadway, a plurality of middle-section transportation roadways and a plurality of centralized transportation roadways, arranging the strip groups in a pseudo-inclined manner along the inclination of the ore body, and controlling the dip angle of the pseudo-inclined manner to be 10-12 degrees, the strip group is divided into a plurality of first strips and a plurality of second strips, the first strips and the second strips are alternately and adjacently arranged, after stoping engineering is completed, filling partition walls are constructed at a lower opening and an upper opening of the cutting uphill, the first strips or the second strips which are firstly mined are closed, and then the first strips or the second strips which are firstly mined are filled with the filling partition walls. And filling the filling material into the goaf by using the filling pipeline. According to the technical scheme, the mechanical degree is high, the labor intensity of workers is low, safety is good, and the operation efficiency is improved.

Description

Technical Field

[0001] This disclosure relates to the field of mining methods, and more particularly to a mining method for gently dipping, medium-thick ore bodies. Background Technology

[0002] Underground mining targets gently dipping, medium-thick ore bodies, especially those with dip angles greater than 15° and less than 30°. Since the dip angle is less than the ore's natural angle of repose, the ore cannot move under its own weight after blasting. Furthermore, this dip angle exceeds the maximum ramp angle for equipment operation, making it difficult for equipment to safely and efficiently perform drilling, support, and ore extraction, resulting in significant mining challenges. Currently, for this type of ore body, methods such as segmented room-and-pillar mining, bottom-structured segmented open area mining, and upward horizontal layered backfilling are commonly used. However, each method has its drawbacks and problems. Segmented room-and-pillar mining results in numerous pillars and a low ore recovery rate; bottom-structured segmented open area mining involves extensive external engineering and a high rate of waste rock contamination; and upward horizontal layered backfilling mining has low production efficiency and high mining costs. Summary of the Invention

[0003] This disclosure aims to address at least one of the technical problems existing in the prior art or related technologies.

[0004] Therefore, this disclosure provides a mining method for gently dipping, medium-thick ore bodies, comprising the following steps:

[0005] The development project is pre-defined, dividing the panel area, strip groups, intake airway, return airway, multiple intermediate transport roadways, and multiple centralized transport roadways into pre-defined development projects. The strip groups are arranged along the pseudo-inclination of the ore body, and the pseudo-inclination angle is controlled to be 10° to 12°. The strip groups are further divided into multiple first strips and multiple second strips, with the first strips and second strips alternately arranged adjacent to each other.

[0006] The development project involves developing the panel area, the strip group, the intake airway, the return airway, multiple intermediate transport airways, and multiple centralized transport airways according to a pre-set development plan.

[0007] The cutting project includes cutting uphill and cutting well. The cutting uphill is located in the middle of the first strip and the second strip. The pseudo-inclination angle of the cutting uphill is the same as that of the strip group. The cutting well is located at the bottom of the strip group. After the cutting project is completed, the roof control work is carried out.

[0008] The top-cutting project involves mining the upper ore body, blasting and then mechanically ventilating it, and then implementing secondary top control within the cut-off layer formed after the upper ore is mined.

[0009] In the longwall mining project, the lower ore body is mined within the cut-off layer after the secondary roof control.

[0010] After the mining is completed, a backfilling partition wall is constructed at the lower and upper openings of the cut-up hill to seal off the first or second strip that was mined first, and the backfilling material is filled into the goaf using backfilling pipelines.

[0011] Cyclic mining is carried out by cyclically mining the first strip or the second strip according to the above steps.

[0012] In one feasible implementation, the intermediate transport roadway and the centralized transport roadway are connected, and the intermediate transport roadway is located in the upper part of the ore layer, while the centralized transport roadway is located in the lower part of the ore layer. Multiple intermediate transport roadways and multiple centralized transport roadways are spaced apart along the dip direction of the ore body, and the intermediate transport roadways and multiple centralized transport roadways extend toward the strike of the ore body. The intake airway and the return airway are connected to the intermediate transport roadway. The panel is set between every two return airways, and the intake airway is set between two return airways.

[0013] In one feasible implementation, the intake airway and the return airway extend along the dip direction of the ore body, the intake airway is located in the middle of the panel, and the intake airway is arranged within the vein with safety pillars on both sides of the airway.

[0014] In one feasible implementation, the return airway is located at the end of the panel, and adjacent ends of the panel may share the return airway individually or jointly. The return airway is arranged within the vein and safety pillars are left on both sides of the airway.

[0015] In one feasible implementation, the multiple intermediate transport lanes are connected by ramps located in the middle of the panel area and are arranged with an external chassis.

[0016] In one feasible implementation, the slope of the ramp is less than 16%.

[0017] In one feasible implementation, a first chute and a second chute are also provided, the first chute being connected to the intermediate transport roadway and the second chute being connected to the centralized transport roadway.

[0018] In one feasible implementation, the first chute and the second chute are located in the middle of the panel area, and the first chute and the second chute are arranged vertically on an external chassis.

[0019] In one feasible implementation, the spacing between the plurality of intermediate transport tunnels is set to 50 to 70 meters, and the panel is set to 400 to 600 meters along the strike of the ore body.

[0020] In one feasible implementation, the width of the first strip is set to 8 to 10 meters, and the width of the second strip is set to 10 to 12 meters.

[0021] In one feasible implementation, the width of the cut uphill is 3.5 meters to 4.5 meters.

[0022] In one feasible implementation, shallow-hole drilling and shallow-hole blasting are used in the cutting project to mine the upper ore body. In the completed cutting uphill section, a drilling rig is used to drill blast holes with a diameter of 42 mm, a depth of 2.5 to 3 meters, and a spacing of 0.6 to 0.7 meters.

[0023] In one feasible implementation, medium-deep hole drilling and medium-deep hole blasting are used in the mining project. In the cut-off layer, a drilling rig is used to drill downward medium-deep holes with a diameter of 65 mm and a depth equal to the full thickness of the lower ore body. The spacing between the holes is 1.5 to 2.0 meters, and the medium-deep holes are drilled in a concentrated manner.

[0024] In one feasible implementation, during the filling process, the wall thickness of the partition wall is 0.5 to 1 meter, a filter pipe is left at the bottom of the partition wall, and the filling material is filled into the goaf using the filling pipeline until the filling is completed.

[0025] In one feasible implementation, the strength of the backfill material after the first strip is mined is greater than 4 MPa, and the strength of the backfill material after the second strip is mined is greater than 1 MPa.

[0026] Compared with existing technologies, this disclosure includes at least the following beneficial effects: This disclosure divides the ore body into multiple panels, which in turn are further divided into multiple strips, enabling simultaneous operation of multiple panels and strips without interference between working faces, significantly improving mine production capacity; the pseudo-inclined strip layout effectively solves the ore handling problem of this dip angle ore body, while meeting the operational needs of large trackless equipment and ensuring ore extraction efficiency; the pre-controlled roof process provides pre-support for the roof of the working space, effectively ensuring the safety of personnel and equipment during mining; only top and bottom pillars are left, resulting in low ore loss and maximizing resource recovery; shallow-hole hydraulic drilling rigs and medium-deep-hole drilling rigs are used for drilling, charging rigs are used for charging, anchor bolt rigs are used for support, and loader haulage is used for ore extraction, resulting in high mechanization, low labor intensity for workers, good safety, and high operational efficiency; the disclosure distinguishes between one-step and two-step mining, with the second-step mining having lower backfill strength and lower cement consumption, effectively reducing backfilling costs. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0028] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of exemplary embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0030] Figure 1 This is a schematic diagram of the cross-sectional structure between the upper and lower middle sections of the transport tunnel disclosed in this invention;

[0031] Figure 2 This is a three-dimensional structural diagram of the present disclosure;

[0032] Figure 3 This is a structural schematic diagram of the first and second stripes in each state of this disclosure;

[0033] Figure 4 This is one of the structural schematic diagrams of the pseudo-tilt angle disclosed herein;

[0034] Figure 5 This is the second schematic diagram of the pseudo-tilt angle structure disclosed herein.

[0035] in, Figures 1 to 5 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0036] 100 - Top column; 200 - Bottom column; 300 - Anchor bolt; 400 - Pseudo-inclination angle;

[0037] 11-First chute; 12-Second chute; 2-Strip group; 21-First strip; 22-Second strip; 3-Intake airway; 4-Return airway; 5-Middle section transport airway; 51-Inclined ramp; 6-Centralized transport airway; 7-Cutting uphill; 8-Cutting top layer; 9-Partition wall; 10-Filling material. Detailed Implementation

[0038] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0039] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0040] Underground mining targets gently dipping, medium-thick ore bodies, especially those with dip angles greater than 15° and less than 30°. Since the dip angle is less than the ore's natural angle of repose, the ore cannot move under its own weight after blasting. Furthermore, this dip angle exceeds the maximum ramp angle for equipment operation, making it difficult for equipment to safely and efficiently perform drilling, support, and ore extraction, resulting in significant mining challenges. Currently, for this type of ore body, methods such as segmented room-and-pillar mining, bottom-structured segmented open area mining, and upward horizontal layered backfilling are commonly used. However, each method has its drawbacks and problems. Segmented room-and-pillar mining results in numerous pillars and a low ore recovery rate; bottom-structured segmented open area mining involves extensive external engineering and a high rate of waste rock contamination; and upward horizontal layered backfilling mining has low production efficiency and high mining costs.

[0041] Based on this, the present disclosure provides a mining method for gently dipping, medium-thick ore bodies. The ore body is divided into multiple panels, which are further divided into multiple strips, enabling simultaneous operation across multiple panels and strips without interference between working faces, significantly improving mine production capacity. A pseudo-dipping strip layout effectively solves the ore handling problem of this dip angle ore body while meeting the operational needs of large trackless equipment, ensuring ore extraction efficiency. A pre-controlled roof process is adopted, with roof support provided in advance for the working space, effectively ensuring the safety of personnel and equipment during mining. Only top and bottom pillars are left, resulting in low ore loss and maximizing resource recovery. Shallow-hole hydraulic drilling rigs and medium-deep-hole drilling rigs are used for drilling, charging rigs for charging, anchor bolt rigs for support, and loader haulage for ore extraction, resulting in high mechanization, low labor intensity for workers, good safety, and high operational efficiency. The method distinguishes between one-step and two-step mining; the second-step mining has lower backfill strength and lower cement consumption, effectively reducing backfilling costs.

[0042] The mining method for this gently dipping, medium-thick ore body will be described in detail below through specific embodiments:

[0043] Reference Figures 1 to 5 As shown, this disclosure provides a mining method for gently dipping, medium-thick ore bodies, comprising the following steps:

[0044] The development project is pre-defined, dividing the panel area, strip group 2, intake airway 3, return airway 4, multiple intermediate transport roadways 5 and multiple centralized transport roadways 6 into pre-defined development projects. Strip group 2 is arranged along the dip of the ore body with a pseudo-dip angle controlled to be 10° to 12°. Strip group 2 is divided into multiple first strips 21 and multiple second strips 22, with the first strips 21 and the second strips 22 alternately adjacent to each other.

[0045] The development project, according to the pre-set development plan, includes the development of the development area, strip group 2, intake airway 3, return airway 4, multiple intermediate transport tunnels 5 and multiple centralized transport tunnels 6;

[0046] The cutting project includes cutting the incline 7 and cutting the riser. Cutting the incline 7 is located in the middle of the first strip 21 and the second strip 22, with the same pseudo-inclination angle as strip group 2. The cutting riser is located at the bottom of strip group 2. After the cutting project is completed, roof control work is carried out. The roof control project adopts a support method of anchor bolts and steel mesh, and uses an anchor bolt trolley for operation. Anchor bolts 15 are 18 mm diameter slotted pipe anchor bolts, 1.8 to 3.0 meters long, arranged in a staggered pattern with a spacing of 1.0 × 1.0 meters. The steel mesh uses a 100 × 100 mm mesh size and 6 mm diameter steel bars.

[0047] The top-cutting project involves mining the upper ore body, followed by mechanical ventilation after blasting, and secondary top control within the cut-off top 8 formed after the upper ore is mined.

[0048] The mining operation involves mining the lower ore body within the cutting top 8 after secondary roof control.

[0049] After the mining is completed, a backfilling partition wall 9 is constructed at the lower and upper openings of the cutting uphill section 7 to seal off the first mining strip 21 or the second mining strip 22. Backfilling materials are then used to fill the goaf through backfilling pipelines.

[0050] Cyclic mining is carried out, and the first strip 21 or the second strip 22 is mined in a cyclic manner according to the above steps.

[0051] This disclosure divides the ore body into multiple panels, which in turn are further divided into multiple strips, enabling simultaneous operation across multiple panels and strips without interference between working faces, significantly improving mine production capacity. The pseudo-dipping strip layout effectively solves the ore handling problem in this dip-angled ore body while meeting the operational needs of large trackless equipment, ensuring efficient ore extraction. A pre-controlled roof process is employed, providing pre-support to the roof of the working space, effectively ensuring the safety of personnel and equipment during mining. Only top and bottom pillars are retained, resulting in low ore loss and maximizing resource recovery. Shallow-hole hydraulic drilling rigs and medium-deep-hole drilling rigs are used for drilling, charging rigs for charging, anchor bolt rigs for support, and loader haulage for ore extraction, resulting in high mechanization, low labor intensity for workers, good safety, and high operational efficiency. The mining process distinguishes between one-step and two-step mining; the two-step mining has lower backfill strength and lower cement consumption, effectively reducing backfilling costs. The first strip 21 and the second strip 22 of this disclosure are arranged in the order of 1, 2, 3, 4, 5... For example, the first strip 21 is odd-numbered and the second strip 22 is even-numbered. Furthermore, top pillars 100 and bottom pillars 200 are set at the top and bottom of the strips. Only the top pillars 100 and bottom pillars 200 are left in the strips, resulting in a low ore loss rate and maximizing resource recovery. The intermediate transport roadway 5 is arranged along the strike of the ore body, located in the bottom pillar 200 of the strip, in the upper part of the ore layer. It is connected to the upper and lower intermediate transport roadways 5 through the inclined ramp 51, and also connects to the ore pass, the intake airway, and the return airway. The inclined ramp 51 is located in the middle of the panel, using an external base arrangement, and the slope of the inclined ramp 51 is less than 16%.

[0052] In some embodiments, the intermediate haulage roadway 5 and the centralized haulage roadway 6 are connected, with the intermediate haulage roadway 5 located in the upper part of the ore layer and the centralized haulage roadway 6 located in the lower part of the ore layer. Multiple intermediate haulage roadways 5 and multiple centralized haulage roadways 6 are spaced apart along the dip direction of the ore body and extend towards the strike of the ore body. The intake airway 3 and the return airway 4 are connected to the intermediate haulage roadway 5, and a panel is set between every two return airways 4. The intake airway 3 is located between two return airways 4. In this embodiment, both the intermediate haulage roadway 5 and the centralized haulage roadway 6 are horizontal roadways, dividing the ore body into multiple panels, which are further divided into multiple strips. This allows for simultaneous operation of multiple panels and multiple strips without interference between working faces, significantly improving mine production capacity.

[0053] In some embodiments, the intake airway 3 and the return airway 4 extend along the dip direction of the ore body. The intake airway 3 is located in the middle of the panel and is arranged within the vein with safety pillars on both sides of the airway.

[0054] In this embodiment, the negative pressure effect of the return airway 4 extending in the dip direction of the ore body facilitates the generation of negative pressure, thus improving the return airflow within the mine. Furthermore, safety pillars are provided on both sides of the airway to further enhance mining safety. Additionally, the return airway 4 is located at the end of a panel, with adjacent panel ends sharing or operating a single return airway 4. The return airway 4 is arranged within the vein, and safety pillars are provided on both sides of the airway.

[0055] In some embodiments, a first ore pass 11 and a second ore pass 12 are also provided. The first ore pass 11 is connected to the intermediate transport roadway 5, and the second ore pass 12 is connected to the central transport roadway 6 to improve mining efficiency.

[0056] In some embodiments, the first chute 11 and the second chute 12 are located in the middle of the panel area, and the first chute 11 and the second chute 12 are arranged vertically on the outer plate.

[0057] In some embodiments, the spacing between multiple intermediate transport roadways 5 is set to 50 to 70 meters, and the panel spacing along the strike of the ore body is set to 400 to 600 meters. A spacing greater than 70 meters between multiple intermediate transport roadways 5 will result in an excessively large exposed area, which is prone to collapse; a spacing less than 50 meters is not conducive to the layout of strip groups. The entire panel spacing along the strike of the ore body is set to 400 to 600 meters. If the panel spacing along the strike of the ore body exceeds 600 meters, it will result in excessive negative pressure within the panel, creating a risk of collapse.

[0058] In some embodiments, the width of the first strip 21 is set to 8 to 10 meters, and the width of the second strip 22 is set to 10 to 12 meters. Generally, the first strip 21 is mined first, and the second strip 22 is mined only after the first strip has reached the sealing stage. Therefore, the width of the first strip should be smaller than the width of the second strip 22 to ensure the strength of the support and sealing, providing strong support for the mining of the second strip 22. If the width of the first strip 21 exceeds 10 meters, the roof will become unstable.

[0059] In some embodiments, the width of the cut incline 7 is 3.5 meters to 4.5 meters. This reduces the risk of mine tunnel collapse; a cut incline 7 less than 3.5 meters would prevent equipment from entering, while a cut greater than 4.5 meters would lead to collapse.

[0060] In some embodiments, shallow-hole drilling and shallow-hole blasting are used in the top-cutting project to mine the upper ore body. Within the completed cut-up hill 7, a drilling rig is used to drill blast holes with a diameter of 42 mm, a depth of 2.5 m to 3 m, and a spacing of 0.6 m to 0.7 m.

[0061] In this embodiment, a shallow-hole hydraulic drilling rig is used to drill parallel blast holes perpendicular to the working face. Specifically, the blast holes are selected with a diameter of 42 mm, a depth of 2.5–3 meters, and a spacing of 0.6–0.7 meters. After drilling, detonators and explosives are loaded into the blast holes, and digital electronic detonators detonate them in one go. Mechanical ventilation is performed after blasting. After ventilation, the blasted ore is transported by a loader through the cutting uphill 11 and the intermediate transport level 9 into the first ore pass 11.

[0062] In some embodiments, medium-deep hole drilling and medium-deep hole blasting are used in the mining process. In the top layer 8, a drilling rig is used to drill downward medium-deep holes with a diameter of 65 mm and a depth equal to the full thickness of the lower ore body. The spacing between the holes is 1.5 to 2.0 meters. The medium-deep holes are drilled in a concentrated manner.

[0063] In this embodiment, medium-deep hole drilling, medium-deep hole blasting, mechanical ventilation, and ore extraction using a loader are employed to mine the lower ore body. Within the pre-controlled top layer 14, a medium-deep hole drilling rig is used to drill downward parallel medium-deep holes. Specifically, the hole diameter is 65 mm, the hole depth is the full thickness of the lower ore body, and the hole spacing is 1.5–2.0 meters. The medium-deep holes are drilled in a concentrated manner. After drilling, detonators and explosives are loaded into the holes using a charging rig, and detonation is performed using digital electronic detonators with micro-delay detonation. Mechanical ventilation is then implemented after blasting. After ventilation, the blasted ore is transported by a loader through a centralized transport level roadway to the second ore pass 12.

[0064] In some embodiments, during the filling process, the wall thickness of the partition wall 9 is 0.5 meters to 1 meter, a filter pipe is left at the bottom of the partition wall 9, and the filling material is filled into the goaf using the filling pipeline until the filling is completed.

[0065] In some embodiments, the strength of the backfill after the first strip 21 is greater than 4 MPa, and the strength of the backfill after the second strip 22 is greater than 1 MPa, thereby ensuring the stability of the stope.

[0066] In this disclosure, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0067] In the description of this disclosure, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0068] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] The above are merely preferred embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A mining method for a gently dipping, medium-thick ore body, characterized in that, Includes the following steps: The development project is pre-defined, dividing the panel area, strip groups, intake airway, return airway, multiple intermediate transport roadways, and multiple centralized transport roadways into pre-defined development projects. The strip groups are arranged along the pseudo-inclination of the ore body, and the pseudo-inclination angle is controlled to be 10° to 12°. The strip groups are further divided into multiple first strips and multiple second strips, with the first strips and second strips alternately arranged adjacent to each other. The development project involves developing the panel area, the strip group, the intake airway, the return airway, multiple intermediate transport airways, and multiple centralized transport airways according to a pre-set development plan. The cutting project includes cutting uphill and cutting well. The cutting uphill is located in the middle of the first strip and the second strip. The pseudo-inclination angle of the cutting uphill is the same as that of the strip group. The cutting well is located at the bottom of the strip group. After the cutting project is completed, the roof control work is carried out. The top-cutting project involves mining the upper ore body, blasting and then mechanically ventilating it, and then implementing secondary top control within the cut-off layer formed after the upper ore is mined. In the longwall mining project, the lower ore body is mined within the cut-off layer after the secondary roof control. After the mining is completed, a backfilling partition wall is constructed at the lower and upper openings of the cut-up hill to seal off the first or second strip that was mined first, and the backfilling material is filled into the goaf using backfilling pipelines. Cyclic mining is carried out by cyclically mining the first strip or the second strip according to the above steps.

2. The mining method for gently dipping, medium-thick ore bodies according to claim 1, characterized in that, The intermediate transport roadway and the centralized transport roadway are connected, and the intermediate transport roadway is located in the upper part of the ore layer, while the centralized transport roadway is located in the lower part of the ore layer. Multiple intermediate transport roadways and multiple centralized transport roadways are spaced apart along the dip direction of the ore body, and the intermediate transport roadways and multiple centralized transport roadways extend towards the strike of the ore body. The intake airway and the return airway are connected to the intermediate transport roadway. The panel is set between every two return airways, and the intake airway is set between two return airways.

3. The mining method for gently dipping, medium-thick ore bodies according to claim 2, characterized in that, The intake airway and the return airway extend along the dip direction of the ore body. The intake airway is located in the middle of the panel and is arranged within the vein with safety pillars on both sides of the airway.

4. The mining method for gently dipping, medium-thick ore bodies according to claim 1, characterized in that, The return airway is located at the end of the panel. The ends of adjacent panels may share the return airway individually or as a single entity. The return airway is arranged within the vein and safety pillars are provided on both sides of the airway.

5. The mining method for gently dipping, medium-thick ore bodies according to claim 1, characterized in that, Multiple intermediate transport lanes are connected by ramps, which are located in the middle of the panel area and are arranged with an external chassis.

6. The mining method for gently dipping, medium-thick ore bodies according to claim 5, characterized in that, The slope of the ramp is less than 16%.

7. The mining method for gently dipping, medium-thick ore bodies according to claim 1, characterized in that, A first chute and a second chute are also provided. The first chute is connected to the intermediate transport roadway, and the second chute is connected to the centralized transport roadway.

8. The mining method for a gently dipping, medium-thick ore body according to claim 7, characterized in that, The first chute and the second chute are located in the middle of the panel area, and the first chute and the second chute are arranged vertically on an external base plate.

9. The mining method for a gently dipping, medium-thick ore body according to claim 1, characterized in that, The spacing between the multiple intermediate transport tunnels is set to 50 to 70 meters, and the panel is set to 400 to 600 meters along the strike of the ore body.

10. The mining method for a gently dipping, medium-thick ore body according to claim 1, characterized in that, The width of the first strip is set to 8 to 10 meters, and the width of the second strip is set to 10 to 12 meters.

11. The mining method for a gently dipping, medium-thick ore body according to claim 1, characterized in that, The width of the cut uphill section is 3.5 meters to 4.5 meters.

12. The mining method for a gently dipping, medium-thick ore body according to claim 1, characterized in that, In the cutting project, shallow-hole drilling and shallow-hole blasting are used to mine the upper ore body. In the completed cutting uphill section, a drilling rig is used to drill blast holes with a diameter of 42 mm, a depth of 2.5 to 3 meters, and a spacing of 0.6 to 0.7 meters.

13. The mining method for a gently dipping, medium-thick ore body according to claim 1, characterized in that, In the mining operation, medium-deep hole drilling and blasting are used. In the cut-off layer, a drilling rig is used to drill downward medium-deep holes with a diameter of 65 mm and a depth equal to the full thickness of the lower ore body. The spacing between the holes is 1.5 to 2.0 meters. The medium-deep holes are drilled in a concentrated manner.

14. The mining method for a gently dipping, medium-thick ore body according to claim 1, characterized in that, In the filling project, the wall thickness of the partition wall is 0.5 meters to 1 meter. A filter pipe is left at the bottom of the partition wall. The filling material is filled into the goaf using the filling pipeline until the filling is completed.

15. The mining method for a gently dipping, medium-thick ore body according to claim 1, characterized in that, The strength of the backfill material after the first strip is mined is greater than 4 MPa, and the strength of the backfill material after the second strip is mined is greater than 1 MPa.

Images