Timely support high efficiency ore material mining method

Abstract

The application relates to a high-efficiency ore drawing method of timely support, and particularly relates to the following steps: when a working face is laid out, a middle-high grade ore layer is arranged at the upper part of the height direction of a mine wall, a bottom waste layer is arranged below the middle-high grade ore layer of the mine wall, the bottom waste layer comprises an upper low grade ore layer and a rock layer, a mining machine A and a mining machine B are arranged on the same working face, small-diameter and medium-diameter rollers are arranged on the mining machine A and the mining machine B respectively, the mining machine A is used to mine most of the middle-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 bottom waste layer in the length direction of the working face, a roof is formed after the middle-high grade ore layer is cut, the mining machine A should timely pull the support to the side of the mine wall to follow the mining machine A to randomly support the roof, and the mining machine A completes the next oblique cutting of a tool and the conveyor pushing operation required based on the oblique cutting of the mining machine A during the operation of the mining machine B. The application can obviously 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, general or poor roof conditions. 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 blocks formed by cutting can easily hinder or even block the walking system of the mining machine, which has a great impact on 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 a timely support 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] A kind of timely support efficient ore extraction method, when laying out the working face, the medium-high grade ore layer is left in the upper part of the height direction of the ore wall, and the bottom waste layer is below the medium-high grade ore layer of the ore wall. The bottom waste layer includes low-grade ore layer and rock layer adjacent to each other. 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. First, mining machine A is used to mine most of the medium-high grade ore layer in the length direction of the working face. Then, mining machine B is used to cut most of the bottom waste layer in the length direction of the working face. The remaining medium-high grade ore layer is mined by mining machine B, and the remaining bottom waste layer is cut by mining machine A. After mining the medium-high grade ore layer by mining machine A, the support should be timely pulled to the ore wall side to follow mining machine A for random support of the roof. Mining machine A completes the next oblique cutting and the required conveyor pushing operation based on the oblique cutting of mining machine A during the operation of mining machine B.

[0006] Mining machine A should stop when mining the medium-high grade ore layer by mining machine A. Mining machine B can run when mining machine A cuts the waste layer.

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

[0008] The timely support 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 from the A end to the mine wall in the rear of the walking direction of the mining machine A 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 mining machine B is respectively called stop distance A and stop distance B, and the bevel cutting distance of the mining machine A and the mining machine B is 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-high grade ore layer, until reaching the A end and parking here, at this time the mining machine A bevels into the mine wall;

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

[0013] S5. The mining machine A walks to the B end until reaching a position away from the B end by one stop distance B, and walks while mining the middle-high grade ore layer; the support follows the mining machine A to randomly support the exposed roof formed after mining the middle-high grade ore layer;

[0014] S6. The mining machine A returns to the A end empty, and the mining machine A passes through the space below the support top beam during the returning process; 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 mine wall and then straightly walks along the mine wall, and walks while cutting off the bottom waste layer;

[0015] S7. The mining machine A continues to return to the A end empty until reaching a position away from the A end by one stop distance A; the pushing device continues to push the conveyor until the B end, and the mining machine B walks to the A end, and walks while cutting off the bottom waste layer;

[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 bottom waste layer; the mining machine B continues to walk to the A end, and walks while cutting off the bottom waste layer;

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

[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 and loading the bottom waste layer, and stops until adjacent to the mining machine A;

[0019] 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 a bevel cutting distance A; meanwhile, 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 distance, and the length of the section of the conveyor is equal to a stop distance A;

[0020] S12. The mining machine A returns to the A end to stop, at this time, the mining machine A 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, the medium-high grade ore layer is mined, and the walking is stopped at the B end;

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

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

[0023] In the step S6, when the space height below the support roof beam is less than the drum diameter of the mining machine A during the process that the mining machine A returns to the A end to cut, the mining machine A continues to cut off a part of the waste to expand the height of the passing space.

[0024] In the 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, the medium-high grade ore is loaded into the conveyor, and the mining machine A is temporarily stopped to wait, and if the cut ore does not meet the requirement of the medium-high grade ore, the waste is loaded into the conveyor.

[0025] The end of the medium-high grade ore layer with a relatively thick thickness is preferably taken as the B end.

[0026] The upper limit value of the length of the working face is preferably not less than 100 m.

[0027] The beneficial effects of the present application are:

[0028] The two mining machines are used to jointly mine in the same working face, and the production capacity of the single face is greatly improved under the condition that the support and the conveyor are unchanged, and the economic benefit is greatly improved.

[0029] The bevel cutting operation of the mining machine A of the next cut and the pushing operation of the conveyor are parallel to the operation of the mining machine B of the previous cut, and a large amount of time can be saved, and thus the mining efficiency can be significantly improved, and the mining cost can be reduced.

[0030] Due to the increased 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 equivalent to the length of more than 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.

[0031] According to the characteristics of "low hardness of the mining material and high hardness of the rock", the small-diameter roller of the mining machine A is used for cutting the mining material, 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 mining material is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a mining material mining process schematic diagram of the application;

[0033] Figure 2 It is a working face equipment lateral schematic diagram when the mining machine A mines the middle-high grade mining material layer;

[0034] Figure 3 It is a working face equipment lateral schematic diagram when the mining machine A cuts the bottom waste material layer close to the A end;

[0035] Figure 4 It is a mining wall cutting state schematic diagram (the mining machines A and B are parked at the initial position before cutting starts);

[0036] Figure 5 It is a mining wall cutting state schematic diagram (the mining machine A mines the middle-high grade mining material layer, and the mining machine B is parked at the initial position and waits);

[0037] Figure 6 It is a mining wall cutting state schematic diagram (the mining machine B cuts the bottom waste material layer, and the mining machine A returns to the initial position and parks to wait);

[0038] Figure 7 It is a mining wall cutting state schematic diagram (the mining machine B returns to the initial position after cutting most of the bottom waste material layer, and the mining machine A cuts the bottom waste material layer of the parking section and parks to wait). BRIEF DESCRIPTION OF DRAWINGS

[0040] A. Mining machine A; B. Mining machine B; S. Conveyor; K. Middle-high grade mining material; F. Waste (referring to low-grade mining material or mixture of low-grade mining material and rock); Lt. Parking distance; Lx. Inclined cutting distance; T. Pushing device; Z. Support;

[0041] Towed to the position; Towed from the position; ‖: Stop towing; →: Tow (the arrow direction indicates the towing direction); The mining machine reciprocates left and right. DETAILED DESCRIPTION

[0042] The application discloses a high-efficiency mining method of timely support, which is a mechanized mining method and is suitable for a working face with a medium-high grade ore layer with a thin thickness and a general or poor roof condition. Figures 1-3 As shown in the figure, the main working face equipment needed includes a mining machine, a conveyor S, a support Z and a moving device T. First, when the working face is laid out, the medium-high grade ore layer should be left in the upper part of the mining wall height direction, and the bottom waste layer is below the medium-high grade ore layer of the mining wall, and the bottom waste layer includes the upper and lower adjacent low grade ore layer and rock layer. The medium-high grade ore K is usable ore, and the low grade ore and rock are both waste F. The mining machine A and the mining machine B are 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, and the machine bodies of the two mining machines can be the same or different. The mining machine A is used to mine most of the medium-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 bottom waste layer in the length direction of the working face, and the application refers to this way as the way of'small diameter roller mining of the mining machine A and medium diameter roller rock cutting of the mining machine B'. The remaining medium-high grade ore layer is mined by the mining machine B, and the remaining bottom waste layer is cut by the mining machine A. The medium-high grade ore layer is cut to form an exposed roof, and the bottom waste layer is cut to form a floor. Since the roof condition is poor, the mining machine A should be timely pulled to the mining wall side after mining the medium-high grade ore to follow the mining machine A to support the roof at random to avoid affecting the safety of the working face. The mining machine A completes the next oblique cutting of the mining machine A and the conveyor pushing operation required based on the oblique cutting of the mining machine A during the operation of the mining machine B.

[0043] The application combines the characteristics that the traction speed of the mining machine is much lower than the speed of the support pulling and the conveyor moving, and proposes a high-efficiency mining method of one-face double-table mining machine combined operation. Through the small cost investment of increasing one mining machine and the corresponding matching parts, the production capacity close to the original double or higher can be realized, and the economic benefit is obviously improved.

[0044] The oblique cutting operation of the mining machine A of the next cut and the pushing operation of the conveyor are parallel to the operation of the mining machine B of the previous cut, which can save a lot of time, and therefore the mining efficiency can be significantly improved, and the mining cost can be reduced.

[0045] Considering that the non-concentrated zone is mostly thin layer, the invention proposes a mining method of mining the relatively low hardness ore material with mining machine A (with small power rocker arm and small diameter roller) and mining the relatively high hardness rock waste with mining machine B (with large power rocker arm and medium diameter roller), which fully utilizes the capacity characteristics of each equipment and is beneficial to ensure the reliability of the work; meanwhile, it is easier to ensure the grade of the ore material and improve the mining efficiency. The diameter of the small diameter roller should be adapted to the thickness of the medium and high grade ore layer. The rocker arm and the roller of the mining machine B should meet the requirements of mining height and loading.

[0046] Further, when the mining machine A mines the medium and high grade ore layer, the mining machine B stops to avoid the waste mixed with the medium and high grade ore, thereby ensuring the clean cutting and loading of the medium and high grade ore. 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 assists in cutting part of the waste layer to share the work of the mining machine B, thereby improving the mining efficiency and increasing the production capacity.

[0047] The cut medium and high grade ore and waste are transported by the same conveyor at different times and can reach different conveying endpoints, i.e. the ore bin, so as to ensure the grade of the ore. The waste is the bottom waste, which is a mixture of low grade ore and rock or low grade ore. If the low grade ore layer below the medium and high grade ore layer is thick enough, there is no need to mine the rock layer, and in this case, the bottom waste is only the low grade ore.

[0048] The efficient ore mining method with timely support can include the following steps:

[0049] S1. The two ends of the working face are marked as A end and B end (in this embodiment, they can correspond to the left end and 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 and high grade ore layer and the waste layer on the mine wall is as shown in Figure 4 The stop state, the mining machine A and the mining machine B each occupy a distance Lt, which is called the parking distance. In order to distinguish the parking distance of the mining machine A and the mining machine B, respectively, they can be called parking distance A and parking distance B.

[0050] S2. Mining machine A walks to B end by a stop distance A plus a bevel cutting distance A (the bevel cutting distance refers to the distance of mining machine bevel cutting into the wall, denoted as Lx, in order to distinguish the corresponding distances of mining machine A and mining machine B, they can be called bevel cutting distance A and bevel cutting distance B respectively) and stops; the pushing device pushes the conveyor behind the walking direction of mining machine A (i.e. the left side in the figure) from A end to the wall by a cutting depth distance, the length of the conveyor is equal to a stop distance A. After pushing, the conveyor will form an S-shaped bending, which is a preparation for mining machine A bevel cutting into the wall on the track. Mining machine B stops at B end and waits. In this step, the conveyor continuously runs to shovel out part of the waste, for the first cut mining, the shovelled out waste is mainly the waste of the wall collapse, for the subsequent cut mining, the shovelled out waste also includes the waste generated in the previous cut mining.

[0051] S3. Mining machine A walks to A end while mining the medium-high grade ore layer until reaching A end and stopping, at this time, mining machine A bevel cuts into the wall.

[0052] S4. The pushing device continues to push the conveyor (the so-called continues to push the conveyor refers to taking the previous pushing end as the starting point of this time pushing, and keeping the same one-way pushing sequence from one end of the working face to the other end of the working face to push the conveyor to the wall by a cutting depth distance), the pushing end is away from B end by a stop distance B plus a bevel cutting distance B. The conveyor continues to shovel out waste from one end to the other end. Similarly, after pushing, the conveyor will form an S-shaped bending, which is a preparation for mining machine B bevel cutting into the wall on the track.

[0053] S5. Mining machine A walks to B end until reaching a stop distance B away from B end, i.e. walking to the position adjacent to mining machine B, and walks while mining the medium-high grade ore layer (see Figure 2 ). The support follows mining machine A to randomly support the exposed roof formed after mining the medium-high grade ore layer (see Figure 3 ). After this step, the medium-high grade ore layer is basically mined (the medium-high grade ore layer in the stop distance B range close to B end has not been mined), and the mining of the wall is shown in Figure 5 .

[0054] In the process of steps S1-S5, mining machine A carries out most of the mining of the medium-high grade ore layer, and mining machine B stops at the initial position and waits. Due to the poor roof condition, after mining the medium-high grade ore layer, the support needs to be moved to the wall side in time for roof support (see Figure 3 、 5 ), so as not to affect the safety of the working face. At this time, the low grade ore layer above the medium-high grade ore layer acts as the roof.

[0055] S6. Mining machine A returns to the A end empty cut, and in the process of returning, the mining machine A passes through the space below the support roof beam (see Figure 3 ); the mining machine B walks to the A end for no less than one stop distance B plus one bevel cutting distance B, first bevel cutting into the wall and then walking along the wall, and in the process of walking, the bottom waste layer is removed.

[0056] S7. The mining machine A continues to return to the A end empty cut until it reaches a distance of one stop distance A from the A end; the pushing device continues to push the conveyor to the B end (i.e. the conveyor is continuously pushed to the B end as the terminal point of pushing), the S-shaped bending is eliminated, the mining machine B walks to the A end, and in the process of walking, the bottom waste layer is removed (see Figure 3 ).

[0057] S8. The mining machine A walks to the A end until it stops at the A end, and in the process of walking, the front arm in the walking direction of the mining machine A mines the bottom waste layer; the mining machine B continues to walk to the A end, and in the process of walking, the bottom waste layer is removed. The wall state is shown in Figure 6 .

[0058] S9. The mining machine A walks to the B end for one stop distance A, and in the process of walking, the bottom waste layer is removed; in combination with steps S8 and S9, the mining machine A needs to remove the bottom waste layer in the range of one 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 removing the bottom waste layer.

[0059] S10. The mining machine A returns to the A end stop; the mining machine B continues to walk to the A end while removing the bottom waste layer, and stops when it is adjacent to the mining machine A, at this time, the mining machine B is about one stop distance A away from the A end. After this step, most of the bottom waste layer is removed.

[0060] 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 for one stop distance A plus one bevel 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 (i.e. the left side in the figure) from the A end to the wall for a distance of one cutting depth, and the length of the section of the conveyor is equal to one stop distance A, after the pushing, the conveyor forms an S-shaped bending again, which is a preparation for the next bevel cutting of the mining machine A into the wall on the track.

[0061] S12. The mining machine A returns to the A end stop, and at this time, the mining machine A bevels into the wall; the mining machine B continues to walk to the B end and loads the waste, and when the mining machine B walks to a distance of one stop distance B from the B end, it starts to mine the middle-high grade ore layer until it walks to the B end stop. At this time, the bottom waste layer in the range of one stop distance B from the B end has not been removed.

[0062] S13. Mining machine B walks to A end for a stop distance B, and cuts off the bottom waste layer; at the same time, the pushing device continues to push the conveyer.

[0063] S14. Mining machine B returns to B end stop; the pushing device continues to push the conveyer, and the pushing end is at a distance B plus a bevel cutting distance B from B end, thus completing a cycle of one cut, and the state of the mining wall is as shown in Figure 7 , and then returns to step S5 to start the next cut.

[0064] During the process of steps S6-S10, mining machine B cuts off most of the bottom waste layer, and mining machine A returns to the initial position to cut off the remaining bottom waste layer of the stop section.

[0065] During the process of steps S11-S14, mining machine B returns to the initial position, and cuts off the medium-high grade ore layer and the bottom waste layer within a stop distance B from B end, thus completing the cutting of the whole mining wall. During this period, mining machine A also completes the bevel cutting of the next cut, and the majority of the conveyer completes a pushing, both of which advance a part of the work of the next cut mining, thus saving a large amount of time compared with the sequential operation, and further improving the mining efficiency.

[0066] If a mining body is completely mined, after the execution of step S10, mining machine B returns to B end, and cuts off the medium-high grade ore layer and the bottom waste layer within a stop distance B from B end during the returning process, which is equivalent to not adding the parallel operation of the bevel cutting of mining machine A and the pushing of the conveyer during the operation of mining machine B in the last cycle.

[0067] In the above step S6, when the space height below the support roof beam is less than the drum diameter of mining machine A during the return of mining machine A to A end without cutting, mining machine A continues to cut off a part of the waste to expand the height of the passing space.

[0068] In the above step S12, when mining machine B mines the medium-high grade ore, if the cut-off ore meets the requirements of the medium-high grade ore, it is loaded into the conveyer as the medium-high grade ore, and mining machine A is temporarily stopped for control to avoid the mixing of the bottom waste of the small drum; if the cut-off ore does not meet the requirements of the medium-high grade ore, it is loaded into the conveyer as waste. Whether it meets the requirements of the medium-high grade ore is mainly determined according to the size relationship between the drum diameter of mining machine B and the thickness of the medium-high grade ore layer at the corresponding position, for example, if the drum diameter of mining machine B exceeds the thickness of the medium-high grade ore layer at the corresponding position too much, the cut-off ore is mixed with too much waste, and the cut-off ore has a high probability of not meeting the requirements of the medium-high grade ore.

[0069] 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. Preferably, the end with a thicker medium-high grade ore layer is taken as the B end. When comparing the thickness of the medium-high grade ore layer at the A and B ends, the average thickness of the medium-high grade ore layer within a certain distance close to the A end and the B end needs to be evaluated.

[0070] 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 ore walls can be greatly reduced, thereby greatly saving the engineering cost corresponding to the amount of roadway excavation.

Claims

1. A method of efficient mining of a high efficiency material with timely support, characterized in that: The high-grade ore layer is arranged at the upper part of the mining wall in the height direction during the layout of the working face, and the low-grade ore layer and the rock layer are arranged below the high-grade ore layer of the mining wall. 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 drum, and the mining machine B is configured with a medium-diameter drum. 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 low-grade ore layer in the length direction of the working face. The remaining high-grade ore layer is mined by the mining machine B, and the remaining low-grade ore layer is cut by the mining machine A. The high-grade ore layer is cut to form a roof, and the low-grade ore layer is cut to form a floor. After the mining machine A mines the high-grade ore layer, the support should be timely pulled to the mining wall side to follow the mining machine A to support the roof at random. The mining machine A completes the next oblique cutting of the mining machine A and the conveyor pushing operation required based on the oblique cutting of the mining machine A during the operation of the mining machine B. The method comprises the following steps: S1. The two ends of the working face are marked as A end and B end, 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 parking distance A plus an oblique cutting distance A to the B end, and the pushing device pushes a section of conveyor behind the walking direction of the mining machine A from the A end to the mining wall by a cutting depth distance. The length of the section of conveyor is equal to a parking distance A. The parking distances of the mining machine A and the mining machine B are respectively referred to as parking distance A and parking 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 to the A end until reaching the A end and parking here, at which 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 parking distance B plus an oblique cutting distance B; S5. The mining machine A walks to the B end until reaching a parking distance B away from the B end, and mines the high-grade ore layer while walking; the support follows the mining machine A to support the exposed roof formed after mining the high-grade ore layer at random; S6. The mining machine A returns to the A end empty, and the mining machine A passes through the space below the support roof beam during the returning process; the mining machine B walks to the A end by no less than a parking distance B plus an oblique cutting distance B, first obliquely cuts into the mining wall, and then straightly walks along the mining wall, and cuts the low-grade ore layer while walking; S7. The mining machine A continues to return to the A end empty until reaching a parking distance A away from the A end; the pushing device continues to push the conveyor until the B end, and the mining machine B walks to the A end, and cuts the low-grade ore layer while walking; S8. The mining machine A walks to the A end until stopping at the A end, and the front swing arm of the mining machine A mines the low-grade ore layer while walking; the mining machine B continues to walk to the A end, and cuts the low-grade ore layer while walking; S9. The mining machine A walks to the B end by a parking distance A, and cuts and loads the low-grade ore layer while walking; the mining machine B continues to walk to the A end while cutting the low-grade ore layer. S10. The mining machine A returns to the A end to stop; the mining machine B continues to walk to the A end while cutting and loading the bottom waste layer until it stops adjacent to the mining machine A; S11. The mining machine B walks to the B end to load waste and control the remaining height of the waste; the mining machine A walks to the B end by a stop distance A plus a bevel 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 the A end to stop, at this time the mining machine A bevels into the wall; the mining machine B continues to walk to the B end and load waste, and 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 until it stops at the B end; S13. The mining machine B walks to the A end by a stop distance B while cutting the bottom waste layer; at the same time, the pushing device continues to push the conveyor; S14. The mining machine B returns to the B end to stop; the pushing device continues to push the conveyor, and the terminal point of the pushing is a stop distance B plus a bevel cutting distance B from the B end, thus completing a cycle of one pass and returning to step S5 to start the next pass.

2. The method of timely supported high performance mineral material extraction according to claim 1, characterized in that: 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 method of timely supported high performance mineral material extraction according to claim 2, characterized in that: The middle-high grade ore and waste cut by the mining machine are transported by the same conveyor at different times, and the waste is the bottom waste, which is a mixture of low-grade ore and rock or low-grade ore.

4. The method of timely supported high performance mineral material extraction according to claim 3, characterized in that: In step S6, during the return of the mining machine A to the A end, when the space height below the support roof beam is less than the diameter of the drum of the mining machine A, the mining machine A continues to cut a part of the waste to expand the height of the passage.

5. The method of timely supported high performance mineral material extraction according to claim 4, characterized in that: 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 to wait, 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 method of timely supported high performance mineral material extraction according to claim 5, characterized in that: The end of the middle-high grade ore layer with a thicker thickness is taken as the B end.

7. The high performance, timely supported, high efficiency, high dilution, high draw material mining method of claims 1, 2, 3, 4, 5 or 6, wherein: The upper limit of the length of the working face is not less than 100 m.

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