High efficiency ore material extraction method

Abstract

The present application relates to a kind of high-efficiency ore material mining method, specifically: when setting working face, high-grade ore material layer is left in the middle or upper part of the direction of the height of the wall, the top and bottom of the high-grade ore material layer of the wall are top waste layer and bottom waste layer respectively, the top waste layer is low-grade ore material layer, and the bottom waste layer includes low-grade ore material layer and rock layer adjacent to the top and bottom, mining machine A and B are simultaneously arranged on the same working face, mining machine A and B are respectively configured with small-diameter roller and medium-diameter roller, mining machine A is used to mine most of the high-grade ore material layer in the length direction of the working face, and then mining machine B is used to cut most of the top and bottom waste layer in the length direction of the working face, the top waste layer forms roof after cutting, and the bottom waste layer forms floor after cutting, mining machine A completes the next diagonal cutting of the tool and the conveyor pushing operation required based on the diagonal cutting of mining machine A during the operation of mining machine B.The present application can significantly improve the mining efficiency and reduce the mining cost.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of ore extraction process, especially suitable for the mining of underground bauxite with medium-high grade ore layer thickness thin, working face roof condition is good or very good. BACKGROUND

[0002] There are a large number of hard materials such as bauxite rock in underground bauxite that need to be mined. Due to the high hardness of the material, a large cutting force is required, and the cutting head is also quickly worn out. Therefore, the cutting difficulty is great, and the hard rock block formed by cutting also easily causes obstruction to the walking system of the mining machine, even stuck, which greatly affects the traction system of the mining machine. Therefore, the moving speed of the mining machine is usually much slower than that of the coal mining machine, and the output is also much smaller, resulting in high production cost. SUMMARY

[0003] The purpose of the present application is to provide an efficient ore extraction method, which can significantly improve the mining efficiency and reduce the mining cost.

[0004] The main technical scheme of the present application is as follows:

[0005] An efficient ore extraction method, when setting up a working face, a medium-high grade ore layer is left in the middle or upper part of the height direction of the ore wall. The upper and lower parts of the medium-high grade ore layer of the ore wall are the top waste layer and the bottom waste layer respectively. The top waste layer is a low-grade ore layer, and the bottom waste layer includes an upper and lower adjacent low-grade ore layer and a rock layer. A mining machine A and a mining machine B are simultaneously arranged on the same working face. The mining machine A and the mining machine B are respectively configured with a small diameter roller and a medium diameter roller. First, the mining machine A is used to mine most of the medium-high grade ore layer in the length direction of the working face. Then, the mining machine B is used to cut most of the top and bottom waste layers in the length direction of the working face. The remaining medium-high grade ore layer is mined by the mining machine B, and the remaining top and bottom waste layers are cut by the mining machine A. After cutting the top waste layer, a roof is formed. After cutting the bottom waste layer, a floor is formed. During the operation of the mining machine B, the mining machine A completes the next diagonal cutting and the required conveyor pushing operation based on the diagonal cutting of the mining machine A.

[0006] When the mining machine A mines the medium-high grade ore layer, the mining machine B should stop. When the mining machine A cuts the waste layer, the mining machine B can run.

[0007] The cut medium-high grade ore and waste are transported by the same conveyor at different times. The waste is top waste and / or bottom waste. The top waste is low-grade ore, and the bottom waste is a mixture of low-grade ore and rock or low-grade ore.

[0008] The efficient ore extraction method can include the following steps:

[0009] S1. The two ends of the working face are marked as A end and B end respectively, and the mining machine A and the mining machine B are parked at the A end and the B end of the working face respectively;

[0010] S2. The mining machine A walks to the B end by one stop distance A plus one bevel cutting distance A, and then stops, the pushing device pushes the conveyor behind the walking direction of the mining machine A from the A end by one cutting depth distance, the length of the conveyor is equal to one stop distance A; the stop distance of the mining machine A and the stop distance of the mining machine B are respectively called stop distance A and stop distance B, and the bevel cutting distance of the mining machine A and the bevel cutting distance of the mining machine B are respectively called bevel cutting distance A and bevel cutting distance B;

[0011] S3. The mining machine A walks to the A end while mining the middle and high grade ore layer, until reaching the A end and parking here, at this time the mining machine A bevels into the ore wall;

[0012] S4. The pushing device continues to push the conveyor, and the terminal point of the pushing is one stop distance B plus one bevel cutting distance B away from the B end;

[0013] S5. The mining machine A walks to the B end until reaching one stop distance B away from the B end, and walks while mining the middle and high grade ore layer;

[0014] S6. The mining machine A returns to the A end empty, the space formed by the mining machine A cutting off the middle and high grade ore layer becomes the passing space of the drum of the mining machine A at this time; the mining machine B walks to the A end by no less than one stop distance B plus one bevel cutting distance B, first bevels into the ore wall and then walks along the ore wall, and walks while cutting off the top and bottom waste layers;

[0015] S7. The mining machine A continues to return to the A end empty, until reaching one stop distance A away from the A end; the pushing device continues to push the conveyor until the B end (i.e. the B end is the terminal point of the pushing to continue to push the conveyor), eliminating the S-shaped bending, and the mining machine B walks to the A end, and walks while cutting off the top and bottom waste layers;

[0016] S8. The mining machine A walks to the A end until stopping at the A end, and walks while the front arm in the walking direction of the mining machine A mines the top waste layer; the mining machine B continues to walk to the A end, and walks while cutting off the top and bottom waste layers;

[0017] S9. The mining machine A walks to the B end by one stop distance A, and walks while cutting off the bottom waste layer; the mining machine B continues to walk to the A end while cutting off the top and bottom waste layers;

[0018] S10. The mining machine A returns to the A end and stops; the mining machine B continues to walk to the A end while cutting off the top and bottom waste layers, until cutting through the top waste layer;

[0019] S11. Mining machine B walks to B end, loads waste and controls its residual height; mining machine A walks to B end by a stop distance A plus a bevel cutting distance A; meanwhile, the pushing device pushes a section of conveyor behind the walking direction of mining machine A from A end by a cutting depth distance, the length of the section of conveyor is equal to a stop distance A;

[0020] S12. Mining machine A returns to A end to stop, at this time, mining machine A bevel cuts into the mine wall; mining machine B continues to walk to B end and loads waste, when mining machine B walks to B end by a stop distance B, it starts to mine medium-high grade ore layer and top waste layer until it walks to B end to stop;

[0021] S13. Mining machine B walks to A end by a stop distance B, meanwhile, it cuts off the bottom waste layer; at the same time, the pushing device continues to push the conveyor;

[0022] S14. Mining machine B returns to B end to stop; the pushing device continues to push the conveyor, the terminal point of pushing is away from B end by a stop distance B plus a bevel cutting distance B, thus a cycle of one pass is completed, and then it returns to step S5 to start the next pass.

[0023] In steps S7-S10, when mining machine B cuts off the top waste layer, the support is pulled to the mine wall to randomly support the exposed roof formed after mining machine B cuts.

[0024] In step S12, when mining machine B mines medium-high grade ore, if the cut ore meets the requirement of medium-high grade ore, it is loaded into the conveyor as medium-high grade ore, meanwhile, mining machine A is temporarily stopped to wait, if the cut ore does not meet the requirement of medium-high grade ore, it is loaded into the conveyor as waste.

[0025] Preferably, the end with thicker medium-high grade ore layer is taken as B end.

[0026] In step S9, after the action of mining machine A is completed, the range of stop distance A of mining machine A from A end can be timely supported.

[0027] The upper limit value of the length of the working face is preferably not less than 100 m.

[0028] The beneficial effects of the present application are:

[0029] The two mining machines are used to jointly mine in the same working face, under the condition that the support and the conveyor are unchanged, the production capacity of the single face is greatly improved, and the economic benefit is greatly improved.

[0030] The bevel cutting operation of mining machine A of the next pass and the pushing operation of the conveyor are parallel to the operation of mining machine B of the previous pass, a large amount of time can be saved, thus the mining efficiency can be significantly improved, and the mining cost can be reduced.

[0031] Due to the increase of production capacity, the utilization rate of the working face equipment is improved, the working face can be greatly lengthened, for example, from the original 100m to 100m-1000m or even longer, which is more than the length of one original working face, so that the number of roadways between working faces is significantly reduced, thereby greatly saving the engineering cost brought by the roadway excavation amount.

[0032] According to the characteristics of "low hardness of the ore and high hardness of the rock", the small-diameter roller of the mining machine A is used for cutting the ore, and the medium-diameter roller of the mining machine B is used for cutting the rock, so that the equipment capacity characteristics are fully utilized, the reliability is ensured, and the grade of the mined ore is ensured and the mining efficiency is improved.

[0033] In the case that the total mining height is unchanged, the low-grade ore layer with relatively low hardness above the medium-high grade ore layer is mined as the top waste, so that the cutting amount of the mining machine to the rock with relatively high hardness below the medium-high grade ore layer is reduced, and therefore the wear of the mining machine is reduced, and the working reliability of the mining machine is improved. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a schematic diagram of the ore mining process of the application;

[0035] Figure 2 It is a lateral schematic diagram of the working face equipment when the mining machine A mines the medium-high grade ore layer;

[0036] Figure 3 It is a lateral schematic diagram of the working face equipment when the mining machine B cuts off the top and bottom waste layers;

[0037] Figure 4 It is a schematic diagram of the ore wall cutting state (the mining machines A and B are parked at the initial position before cutting starts);

[0038] Figure 5 It is a schematic diagram of the ore wall cutting state (the mining machine A mines the medium-high grade ore layer, and the mining machine B is parked at the initial position to wait);

[0039] Figure 6 It is a schematic diagram of the ore wall cutting state (the mining machine B cuts off the top and bottom waste layers, and the mining machine A returns to the initial position);

[0040] Figure 7 It is a schematic diagram of the ore wall cutting state (the mining machine B returns to the initial position after cutting off most of the top and bottom waste layers, and the mining machine A is parked and waits after oblique cutting into the ore wall). BRIEF DESCRIPTION OF DRAWINGS:

[0042] A. Mining machine A; B. Mining machine B; S. Conveyor; K. Medium-high grade ore; F. Waste (referring to low grade ore or mixture of low grade ore and rock); Lt. Stopping distance; Lx. Inclined cutting distance; T. Pushing device; Z. Support;

[0043] Pull to the position; Pull from the position; ||: Stop pulling; Pull (the direction of the arrow indicates the pulling direction); Mining machine left and right reciprocating walking. DETAILED DESCRIPTION

[0044] The application discloses a kind of high-efficiency ore extraction methods, it is a mechanized mining method, it is applicable to medium-high grade ore layer thickness is thin, roof condition is good or very good working face.For example Figures 1-3 As shown, the main working face equipment needed includes mining machine, conveyor S, support Z and pushing device T. First, when laying out working face, medium-high grade ore layer should be left in the middle or upper part of the height direction of mine wall, the top and bottom of the medium-high grade ore layer of mine wall are top waste layer and bottom waste layer respectively, the top waste layer is low grade ore layer, and the bottom waste layer includes adjacent low grade ore layer and rock layer. Medium-high grade ore K is usable ore, and low grade ore and rock are both waste F. Mining machine A and mining machine B are arranged on the same working face, mining machine A and mining machine B are respectively configured with small diameter roller and medium diameter roller, and the machine bodies of the two mining machines can be the same or different. First, mining machine A is used to mine most of the medium-high grade ore layer in the length direction of working face, and then mining machine B is used to cut most of the top and bottom waste layer in the length direction of working face. The application refers to this way as "small diameter roller mining of mining machine A and medium diameter roller rock cutting of mining machine B". The remaining medium-high grade ore layer is mined by mining machine B, and the remaining top and bottom waste layer is cut by mining machine A. After cutting the top waste layer, the exposed roof is formed, and after cutting the bottom waste layer, the floor is formed. During the operation of mining machine B, mining machine A completes the next inclined cutting and the conveyor pushing operation required based on the inclined cutting of mining machine A.

[0045] Due to good roof conditions, mining machine A does not support the roof after mining medium-high grade ore, and does not affect the safety of the working face.

[0046] The application combines the characteristics that the pulling speed of mining machine is much lower than the pulling speed of support and conveyor, and proposes a high-efficiency mining method of one-face double-table mining machine combined operation. By increasing one mining machine and the small cost investment of corresponding supporting parts, the production capacity can be doubled or higher, and the economic benefit is obviously improved.

[0047] The mining machine A of the latter cutting operation and the pushing operation of the conveyor are parallel to the operation of the mining machine B of the former cutting operation, which can save a large amount of time, and thus can significantly improve the mining efficiency and reduce the mining cost.

[0048] In view of the fact that the ore layer in the non-concentrated area is mostly thin, the present application proposes a mining method in which the mining machine A (equipped with a small-power rocker arm and a small-diameter roller) is used to mine the ore with relatively low hardness, and the mining machine B (equipped with a large-power rocker arm and a medium-diameter roller) is used to mine the rock waste with relatively high hardness, so as to fully exert the capability characteristics of each equipment and facilitate the reliability of the work; meanwhile, the grade of the ore can be more easily ensured, and the mining efficiency can be improved. The diameter of the small-diameter roller should be adapted to the thickness of the medium-high grade ore layer. The rocker arm and the roller of the mining machine B should be able to meet the requirements of the mining height and the loading.

[0049] In the case of the same total mining height, the present application can reduce the cutting amount of the mining machine B on the rock with relatively high hardness located below the medium-high grade ore layer by mining the low grade ore layer with relatively low hardness above the medium-high grade ore layer as the top waste, so as to reduce the wear of the mining machine and improve the working reliability of the mining machine.

[0050] Further, when the mining machine A mines the medium-high grade ore layer, the mining machine B is stopped to avoid the waste cut by the mining machine B from mixing into the medium-high grade ore, and thus the medium-high grade ore can be cut and loaded cleanly. When the mining machine A cuts the waste layer, walks or stops, the mining machine B can operate. When the two mining machines operate simultaneously, the mining machine A cuts and removes part of the waste layer to share the work of the mining machine B, so as to improve the mining efficiency and increase the production capacity.

[0051] The medium-high grade ore and the waste cut by the cutting are transported by the same conveyor at different times, and can reach different conveying endpoints, i.e. the ore bins, so as to ensure the grade of the ore. The waste is the top waste and / or the bottom waste, the top waste is the low grade ore, and the bottom waste is the mixture of the low grade ore and the rock or the low grade ore. If the low grade ore layer below the medium-high grade ore layer is thick enough, the rock layer does not need to be mined, and in this case, the bottom waste is only the low grade ore.

[0052] The high-efficiency ore mining method can include the following steps:

[0053] S1. The two ends of the working face are marked as the A end and the B end (in this embodiment, which can correspond to the left end and the right end of the illustrated working face, respectively). The mining machine A and the mining machine B are parked at the A end and the B end of the working face, respectively, and are ready to start a new cut. At this time, the distribution of the medium-high grade ore layer and the waste layer on the mine wall is as shown in Figure 4As shown. In the stopped state, mining machine A and mining machine B each occupy a distance Lt, which is called the stopping distance. To easily distinguish the stopping distances of mining machine A and mining machine B, they can be referred to as stopping distance A and stopping distance B, respectively.

[0054] S2. Mining machine A travels towards end B with a stopping distance A plus a slant cutting distance A (the slant cutting distance refers to the distance the mining machine travels along the ore wall when making a slant cut, denoted as Lx; to distinguish the corresponding distances of mining machine A and mining machine B, they can be called slant cutting distance A and slant cutting distance B respectively) and then stops. The pushing device pushes a section of the conveyor from end A (i.e., the left side of the diagram) towards the ore wall a cutting depth distance, the length of which is equal to a stopping distance A. After the pushing, the conveyor will form an S-shaped bend, which prepares the track for mining machine A to make a slant cut into the ore wall. Mining machine B stops and waits at end B. During this step, the conveyor continues to run and shovels out some waste material. For the first cut, the shoveled waste material is mainly waste material from the ore wall collapse; for subsequent cuts, the shoveled waste material also includes waste material generated during the previous cut.

[0055] S3. While the mining machine A moves towards end A, it mines the medium- and high-grade ore layer until it reaches end A and stops there. At this time, the mining machine A cuts into the ore wall at an angle.

[0056] S4. The conveyor continues to move the conveyor towards the mine wall (continuing to move the conveyor means using the previous end point as the starting point of this move, and maintaining the same unidirectional moving sequence from one end of the working face to the other, moving the conveyor a distance of one cutting depth). The end point of the move is one stopping distance B plus one oblique cutting distance B from end B. The conveyor continues to scoop out waste material from one end to the other. Similarly, after the move, the conveyor will form an S-shaped bend, which prepares the track for the mining machine B to obliquely cut into the mine wall.

[0057] S5. Mining machine A moves from end A to end B until it reaches a stopping distance B from end B, i.e., it moves to a position adjacent to mining machine B. During this movement, it simultaneously mines the medium-to-high grade ore layer. After this step, the medium-to-high grade ore layer is basically mined (the medium-to-high grade ore layer within the stopping distance B of mining machine B has not yet been mined), and the ore wall mining situation is as follows. Figure 5 As shown. At this point, the top waste layer has not yet been removed, and the support remains stationary (see...). Figure 2 ).

[0058] During steps S1-S5, mining machine A extracts most of the medium-to-high-grade ore layer, while mining machine B remains stationary at its initial position. Due to favorable roof conditions, no support is implemented immediately after the extraction of the medium-to-high-grade ore layer (see [link]). Figure 2), but does not affect the safety of the working face.

[0059] S6. Mining machine A returns to the A end empty cutting, the space formed by the mining machine A cutting the middle-high grade ore layer previously is the passing space of the drum of the mining machine A at this time; the mining machine B walks to the A end not less than one stop distance B plus one oblique cutting distance B, first obliquely cuts into the ore wall and then walks along the ore wall, and cuts the top and bottom waste layers at the same time.

[0060] S7. The mining machine A continues to return to the A end empty cutting until it reaches a distance of one stop distance A from the A end; the pushing device continues to push the conveyors until the B end (i.e. continues to push the conveyors with the B end as the terminal point of pushing), eliminating the S-shaped bending; the mining machine B walks to the A end, cutting the top and bottom waste layers at the same time (see Figure 3 ).

[0061] S8. The mining machine A walks to the A end until it stops at the A end, and the front of the walking direction of the mining machine A cuts the top waste layer with the rocker arm; the mining machine B continues to walk to the A end, cutting the top and bottom waste layers at the same time. The state of the ore wall is shown in Figure 6 .

[0062] S9. The mining machine A walks to the B end for one stop distance A, cutting the bottom waste layer at the same time; in combination with steps S8 and S9, the mining machine A needs to cut the top and bottom waste layers by itself within the stop distance A from the A end (i.e. the parking section of the mining machine A); the mining machine B continues to walk to the A end while cutting the top and bottom waste layers.

[0063] S10. The mining machine A returns to the A end stop; the mining machine B continues to walk to the A end while cutting the top and bottom waste layers, until it cuts through the top waste layer, at which time the mining machine B is about one stop distance A away from the A end, adjacent to the mining machine A. After this step, most of the top and bottom waste layers are cut off.

[0064] S11. The mining machine B walks to the B end, loads the remaining waste and controls the remaining height of the waste, ensuring that the remaining float after the push-scooping of the part of the waste fills the space above the front and rear of the shovel, providing a bottom cushion and guide support for the next cut of the middle-high grade ore into the conveyors; the mining machine A walks to the B end for one stop distance A plus one oblique cutting distance A; at the same time, the pushing device pushes a section of the conveyors from the A end in the rear of the walking direction of the mining machine A (i.e. the left side in the figure) by a distance of one cutting depth, and the length of the section of the conveyors is equal to one stop distance A, and after the pushing, the conveyors form an S-shaped bending again, which is a preparation for the next oblique cutting of the mining machine A into the ore wall on the track.

[0065] S12. Mining machine A returns to stop at A end, at this time mining machine A is obliquely cutting into the ore wall; mining machine B continues to walk to B end and load waste, when mining machine B walks to a stop distance B from B end, it starts to mine the medium-high grade ore layer and the top waste layer, until it walks to B end to stop. At this time, the bottom waste layer in the range of a stop distance B from B end has not been cut off.

[0066] S13. Mining machine B walks to A end by a stop distance B, at the same time, the bottom waste layer is cut off; at the same time, the pushing device continues to push the conveyor.

[0067] S14. Mining machine B returns to stop at B end; the pushing device continues to push the conveyor, the end of pushing is a stop distance B plus an oblique cutting distance B from B end, thus a cycle of one pass is completed, the state of the ore wall is shown in Figure 7 , and then returns to step S5 to start the next pass.

[0068] In the process of steps S6-S10, mining machine B cuts off most of the top and bottom waste layers, and mining machine A returns to the initial position to cut off the remaining top and bottom waste layers of the stop section.

[0069] In step S9, after the action of mining machine A is completed, the stop section of mining machine A can be supported in time to ensure the safety of the stop section of mining machine A.

[0070] In the process of steps S11-S14, mining machine B returns to the initial position and cuts the medium-high grade ore layer and the top and bottom waste layers in the range of a stop distance B from B end, thus the cutting of the whole ore wall is completed. During this period, mining machine A also completes the oblique cutting of the next pass, and most of the conveyor completes a pushing, both of which advance a part of the work of the next pass mining, which saves a lot of time compared to the sequential operation, thus further improving the mining efficiency.

[0071] If a place of ore body is completely mined, after step S10 is executed, mining machine B returns to B end and cuts the medium-high grade ore layer and the top and bottom waste layers in a stop distance B close to B end during the returning process, which is equivalent to not adding the parallel operation of the oblique cutting of mining machine A and the pushing of the conveyor in the last cycle when mining machine B is operated.

[0072] In the above steps S7-S10, when mining machine B cuts off the top waste layer, the support is pulled towards the ore wall to randomly support the exposed roof formed by the cutting of mining machine B, and a section close to B end cannot be supported temporarily because there is an unmined ore wall.

[0073] In step S12, when the mining machine B mines the medium-high grade ore, if the cut ore meets the requirement of the medium-high grade ore, it is loaded into the conveyor as the medium-high grade ore, and the mining machine A is temporarily stopped to wait, so as to avoid the waste mixed into the bottom of the small roller; if the cut ore does not meet the requirement of the medium-high grade ore, it is loaded into the conveyor as the waste. Whether the cut ore meets the requirement of the medium-high grade ore is mainly determined according to the size relationship between the diameter of the roller of the mining machine B and the thickness of the medium-high grade ore layer at the corresponding position. For example, if the diameter of the roller of the mining machine B is too large than the thickness of the medium-high grade ore layer at the corresponding position, the cut ore is mixed with more waste, and the cut ore has a high probability of not meeting the requirement of the medium-high grade ore.

[0074] The B end is the starting position of the mining machine B, and is the end close to the area where the mining machine B mines a small amount of medium-high grade ore. It is preferred that the end of the medium-high grade ore layer with a larger thickness is taken as the B end. When comparing the thicknesses of the medium-high grade ore layers at the A end and the B end, the average thicknesses of the medium-high grade ore layers in a distance close to the A end and the B end respectively need to be evaluated.

[0075] The upper limit of the length of the ore wall of the working face is preferably not less than 100 m, for example, 100-1000 m, or even longer. Compared with the original 100 m, the number of roadways between the ore walls can be greatly reduced, and therefore the engineering cost corresponding to the amount of roadway excavation can be greatly saved.

Claims

1. A method of efficient ore material extraction, characterized by: The high-grade ore layer is arranged in the middle or upper part of the mining wall during the layout of the working face, and the upper and lower parts of the high-grade ore layer in the mining wall are the top waste layer and the bottom waste layer respectively, the top waste layer is a low-grade ore layer, and the bottom waste layer includes the low-grade ore layer and the rock layer adjacent to the upper and lower parts, the mining machine A and the mining machine B are arranged on the same working face at the same time, the mining machine A is configured with a small-diameter roller, and the mining machine B is configured with a medium-diameter roller, the mining machine A is used to mine most of the high-grade ore layer in the length direction of the working face, and then the mining machine B is used to cut most of the top and bottom waste layers in the length direction of the working face, the remaining high-grade ore layer is mined by the mining machine B, and the remaining top and bottom waste layers are cut by the mining machine A, the top waste layer is cut to form a roof, and the bottom waste layer is cut to form a floor, the mining machine A completes the next oblique cutting of the tool during the operation of the mining machine B, and the conveyor pushing operation is performed based on the oblique cutting of the mining machine A; The method comprises the following steps: S1. The two ends of the working face are marked as A end and B end respectively, and the mining machine A and the mining machine B are parked at the A end and the B end of the working face respectively; S2. The mining machine A stops after walking a stop distance A plus an oblique cutting distance A towards the B end, and the pushing device pushes a section of the conveyor behind the walking direction of the mining machine A from the A end by a cutting depth, the length of the section of the conveyor is equal to a stop distance A; the stop distances of the mining machine A and the mining machine B are respectively referred to as stop distance A and stop distance B, and the oblique cutting distances of the mining machine A and the mining machine B are respectively referred to as oblique cutting distance A and oblique cutting distance B; S3. The mining machine A mines the high-grade ore layer while walking towards the A end until reaching the A end and parking there, at this time, the mining machine A obliquely cuts into the mining wall; S4. The pushing device continues to push the conveyor, and the terminal point of the pushing is away from the B end by a stop distance B plus an oblique cutting distance B; S5. The mining machine A walks towards the B end until reaching a position away from the B end by a stop distance B, and mines the high-grade ore layer while walking; S6. The mining machine A returns to the A end empty, and the space formed by the mining machine A cutting off the high-grade ore layer becomes the passing space of the roller of the mining machine A at this time; the mining machine B walks towards the A end by no less than a stop distance B plus an oblique cutting distance B, first obliquely cuts into the mining wall, and then walks along the mining wall, and cuts off the top and bottom waste layers while walking; S7. The mining machine A continues to return to the A end empty until reaching a position away from the A end by a stop distance A; the pushing device continues to push the conveyor until the B end, i.e. continues to push the conveyor with the B end as the terminal point of the pushing, eliminates the S-shaped bending, and the mining machine B walks towards the A end, and cuts off the top and bottom waste layers while walking; S8. The mining machine A walks towards the A end until stopping at the A end, and the front swing arm in the walking direction of the mining machine A mines the top waste layer while walking; the mining machine B continues to walk towards the A end, and cuts off the top and bottom waste layers while walking; S9. The mining machine A walks a stop distance A towards the B end, and cuts off the bottom waste layer while walking; the mining machine B continues to walk towards the A end while cutting off the top and bottom waste layers. S10. The mining machine A returns to stop at the A end; the mining machine B continues to walk to the A end while cutting off the top and bottom waste layers until cutting through the top waste layer; S11. The mining machine B walks to the B end, loads the waste and controls the remaining height of the waste; the mining machine A walks to the B end by a stop distance A plus an oblique cutting distance A; at the same time, the pushing device pushes a section of the conveyor behind the walking direction of the mining machine A from the A end by a cutting depth, and the length of the section of the conveyor is equal to a stop distance A; S12. The mining machine A returns to stop at the A end, at this time the mining machine A obliquely cuts into the mine wall; the mining machine B continues to walk to the B end and loads the waste, when the mining machine B walks to a stop distance B from the B end, it starts to mine the middle-high grade ore layer and the top waste layer until it walks to the B end and stops; S13. The mining machine B walks to the A end by a stop distance B while cutting off the bottom waste layer; at the same time, the pushing device continues to push the conveyor; S14. The mining machine B returns to stop at the B end; the pushing device continues to push the conveyor, and the end point of the pushing is a stop distance B plus an oblique cutting distance B from the B end, thus completing a cycle of one cut and returning to step S5 to start the next cut.

2. The high performance mineral aggregate mining method of claim 1, wherein: The mining machine A mines the middle-high grade ore layer while the mining machine B stops; the mining machine A cuts the waste layer while the mining machine B runs.

3. The high performance mineral aggregate mining method of claim 2, wherein: The middle-high grade ore and the waste cut by the cutting are transported by the same conveyor at different times, the waste is the top waste and / or the bottom waste, the top waste is low-grade ore, and the bottom waste is a mixture of low-grade ore and rock or low-grade ore.

4. The high performance mineral aggregate mining method of claim 3, wherein: In steps S7-S10, when the mining machine B cuts off the top waste layer, the support is pulled towards the mine wall to randomly support the exposed roof formed by the cutting of the mining machine B.

5. The high performance mineral aggregate mining method of claim 4, wherein: In step S12, when the mining machine B mines the middle-high grade ore, if the cut ore meets the requirements of the middle-high grade ore, it is loaded into the conveyor as middle-high grade ore, and the mining machine A is temporarily stopped for waiting, and if the cut ore does not meet the requirements of the middle-high grade ore, it is loaded into the conveyor as waste.

6. The high performance mineral aggregate mining method of claim 3, wherein: The end of the middle-high grade ore layer with a thicker thickness is taken as the B end.

7. The high performance mineral aggregate mining method of claim 5, wherein: The end of the middle-high grade ore layer with a thicker thickness is taken as the B end.

8. The high performance mineral aggregate mining method of claim 5, wherein: In step S9, after the mining machine A completes the action, timely support is performed in the range of a stop distance A of the mining machine A from the A end.

9. The high performance mineral aggregate mining method as claimed in claim 1, 2, 3, 4, 5, 6, 7 or 8, wherein: The upper limit value of the length of the working face is not less than 100 m.

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