Mining method and system for fully mechanized working face

Abstract

The present application relates to the field of coal mining, and provides a mining method and system for a fully-mechanized coal mining face, the method comprising: a double-drum shearer cutting coal to a first target position on a second end side, a single-drum shearer being located in an outer side area, and the fully-mechanized coal mining face being an inner side area; after the double-drum shearer obliquely cuts in a first preset distance at the first target position, the double-drum shearer cuts coal on a first end side to cut through the coal wall on the first end, the single-drum shearer vertically cuts in a first preset distance in the outer side area and cuts coal on the first end side; after the double-drum shearer obliquely cuts in a second preset distance on the first end to the coal wall, the double-drum shearer cuts coal to a second target position on the second end side, and cuts coal on the first end side at the second target position to cut through the coal wall on the first end; and the above steps are repeated. The present application optimizes the control logic of the double-drum shearer and the single-drum shearer, the single-drum shearer vertically cuts in once in advance on the second end to improve the operation efficiency and reduce the waiting time.

Description

Technical Field

[0001] This invention relates to the technical field of coal mining, and in particular to a mining method and system for a fully mechanized longwall face. Background Technology

[0002] In the mining of medium-thick coal seams, increasing the length of the working face is an effective means to improve production efficiency. Currently, most fully mechanized mining faces use a single coal cutter for bidirectional coal cutting. Using a dual coal cutter can further improve mining efficiency, especially for ultra-long working faces greater than 600 meters, which will greatly reduce the coal cutter's recovery cycle.

[0003] Existing technologies include two-stage mining schemes consisting of two double-drum mining machines or three-stage mining schemes consisting of two single-drum mining machines plus one double-drum mining machine. However, regardless of the scheme, there are problems such as high requirements for the synchronous operation of multiple mining machines and complex operation. In particular, it is "unfriendly" to scraper conveyors, with many curved sections and even multiple S-bends. The coal volume fluctuates greatly, and there is a tendency for the coal to slide from the middle to both ends, making it difficult for the cutter to advance at the single mining end, which seriously affects the coal mining efficiency. Summary of the Invention

[0004] This invention provides a mining method and system for fully mechanized mining faces to solve the defects of existing technologies, such as high requirements for synchronous operation when multiple coal mining machines cooperate, complex operation, "unfriendly" to scraper conveyors, multiple curved sections or even multiple S-bends, large fluctuations in coal volume, and the phenomenon of coal sliding from the middle to both ends, which makes it difficult to advance the cutter at the single mining end and seriously affects the coal mining efficiency.

[0005] According to a first aspect of the present invention, a mining method for a fully mechanized mining face is provided, wherein a double-drum coal mining machine and a single-drum coal mining machine are provided in the fully mechanized mining face, the double-drum coal mining machine is provided at the first end of the fully mechanized mining face, and the single-drum coal mining machine is provided at the second end of the fully mechanized mining face. The method includes: S100, the double-drum coal mining machine cuts coal to one side of the second end until it moves to the first target position, wherein the single-drum coal mining machine is located in the outer area of ​​the fully mechanized mining face at the second end, and the area where the fully mechanized mining face is located is the inner area; S200, after the double-drum coal mining machine cuts obliquely into the coal wall at the first target position for a first preset distance, it cuts coal to one side of the first end until the coal wall at the first end is cut through. During the above process, the single-drum coal mining machine cuts vertically into the outer area along a direction perpendicular to the coal wall for the first preset distance and cuts coal to one side of the first end, at least moving to the first target position. S300, after the double-drum coal mining machine cuts the coal wall at the first end at an oblique angle for a second preset distance, it cuts the coal to one side of the second end until it moves to the second target position, and then cuts the coal to one side of the first end at the second target position until the coal wall at the first end is cut through. S400, repeat steps S100 to S300 above.

[0006] According to one embodiment of the present invention, step S200 further includes: S210, the single-drum coal mining machine moves from the first target position to the second end, and makes a second preset vertical advance in the outer region along a direction perpendicular to the coal wall; S220, the single-drum coal mining machine cuts coal to one side of the first end until it moves to the third target position, and a machine nest is formed between the second end and the third target position.

[0007] Specifically, this embodiment provides an implementation method for a single-drum coal mining machine to cut coal and form a machine nest.

[0008] According to one embodiment of the present invention, step S220 further includes: S230, when the single-drum coal mining machine moves from the third target position to the second end, the double-drum coal mining machine cuts coal to one side of the second end and moves at least to the first target position.

[0009] Specifically, this embodiment provides a cooperative operation implementation method for a single-drum coal mining machine and a double-drum coal mining machine.

[0010] According to one embodiment of the present invention, step S220 further includes: S240, Obtain the working information of the twin-drum coal mining machine at the fully mechanized mining face, and determine the third target position based on the working information, wherein the working information includes at least the movement parameters and coal cutting parameters of the twin-drum coal mining machine.

[0011] Specifically, this embodiment provides another implementation method for the coordinated operation of a single-drum coal mining machine and a double-drum coal mining machine.

[0012] According to one embodiment of the present invention, in step S100, the starting position of the double-drum coal mining machine is the first end.

[0013] Specifically, this embodiment provides an implementation method in which a double-drum coal mining machine is started at the first end.

[0014] According to one embodiment of the present invention, in step S100, the starting position of the double-drum coal mining machine is located between the first end and the second end.

[0015] Specifically, this embodiment provides an implementation method for starting a dual-drum coal mining machine at a non-first end.

[0016] According to one embodiment of the present invention, when the starting position of the double-drum coal mining machine is located between the first end and the second end, it further includes: S110, after the double-drum coal mining machine cuts the coal wall at the starting position by a second preset distance, it cuts coal to the second end side until it moves to the fourth target position, and cuts coal to the first end side at the fourth target position until the coal wall at the first end is cut through. S120, proceed to step S100.

[0017] Specifically, this embodiment provides an implementation method for a dual-drum coal mining machine to cut coal when the machine is not started at the first end.

[0018] According to one embodiment of the present invention, the first end is the head end and the second end is the tail end.

[0019] Specifically, this embodiment provides an implementation method for the specific placement of a double-drum coal mining machine and a single-drum coal mining machine in a fully mechanized mining face.

[0020] According to one embodiment of the present invention, the first end is the tail end and the second end is the head end.

[0021] Specifically, this embodiment provides another implementation method for the specific location of a double-drum coal mining machine and a single-drum coal mining machine in a fully mechanized mining face.

[0022] According to a second aspect of the present invention, a mining system for a fully mechanized mining face is provided for performing the mining method described above for a fully mechanized mining face.

[0023] The above-mentioned one or more technical solutions of the present invention have at least one of the following technical effects: The mining method and system of the fully mechanized mining face provided by the present invention, by reasonably optimizing the control logic of the double-drum coal mining machine and the single-drum coal mining machine, improves the working efficiency of the single-drum coal mining machine by advancing the vertical cut at the second end once in advance, reduces the waiting time, and is simpler and more practical than the work of multiple coal mining machines working together. Moreover, the coal mining efficiency of the double-drum coal mining machine and the single-drum coal mining machine working together is also higher than that of the single coal mining machine.

[0024] Furthermore, this invention sets the single-drum coal miner to advance one vertical cut in advance. When the double-drum coal miner completes its cutting stroke and reaches the tail section, the tail section already contains a prepared new coal face. The double-drum coal miner can then begin cutting coal directly without waiting, and the single-drum coal miner follows up with its advance cut. This significantly reduces the total processing time at the tail end.

[0025] In other words, when the double-drum coal mining machine returns to the middle to prepare for cutting, the single-drum coal mining machine can independently complete the cutting at the tail end in advance, thus eliminating the bottleneck of tail cutting time. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is one of the flowcharts of the mining method for a fully mechanized mining face provided by the present invention.

[0028] Figure 2 This is the second schematic diagram of the mining method for the fully mechanized mining face provided by the present invention.

[0029] Figure 3 This is the third flowchart of the mining method for the fully mechanized mining face provided by the present invention.

[0030] Figure 4 This is the fourth flowchart of the mining method for the fully mechanized mining face provided by the present invention.

[0031] Figure 5 This is the fifth flowchart of the mining method for the fully mechanized mining face provided by the present invention.

[0032] Figure 6 This is one of the schematic diagrams of the coal cutting state in the mining method of the fully mechanized mining face provided by the present invention.

[0033] Figure 7 This is the second schematic diagram of the coal cutting state in the mining method of the fully mechanized mining face provided by the present invention.

[0034] Figure 8 This is the third schematic diagram of the coal cutting state in the mining method of the fully mechanized mining face provided by the present invention.

[0035] Figure 9 This is the fourth schematic diagram of the coal cutting state in the mining method of the fully mechanized mining face provided by the present invention.

[0036] Figure 10This is the fifth schematic diagram of the coal cutting state in the mining method of the fully mechanized mining face provided by the present invention.

[0037] Figure 11 This is the sixth schematic diagram of the coal cutting state in the mining method of the fully mechanized mining face provided by the present invention.

[0038] Figure 12 This is the seventh schematic diagram of the coal cutting state in the mining method of the fully mechanized mining face provided by the present invention.

[0039] Figure 13 This is the eighth schematic diagram of the coal cutting state in the mining method of the fully mechanized mining face provided by the present invention.

[0040] Figure 14 This is the ninth schematic diagram of the coal cutting state in the mining method of the fully mechanized mining face provided by the present invention.

[0041] Figure 15 This is the tenth schematic diagram of the coal cutting state in the mining method of the fully mechanized mining face provided by the present invention.

[0042] Figure 16 This is eleventh of the schematic diagrams illustrating the coal cutting state of the fully mechanized mining face provided by this invention.

[0043] Figure 17 This is the twelfth schematic diagram of the coal cutting state in the mining method of the fully mechanized mining face provided by the present invention.

[0044] Figure 18 This is the thirteenth schematic diagram of the coal cutting state in the mining method of the fully mechanized mining face provided by the present invention.

[0045] Figure label: 10. Double-drum coal mining machine; 20. Single-drum coal mining machine. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element 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 the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] The following is combined with Figures 1 to 18 This invention will be described in detail below.

[0049] In possible embodiments, such as Figure 1 As shown, the specific control process for the coordinated operation of the double-drum coal mining machine 10 and the single-drum coal mining machine 20 of the present invention is as follows: In step S100, the double-drum coal mining machine 10 cuts coal to one side of the second end until it moves to the first target position. The single-drum coal mining machine 20 is located at the outer area of ​​the fully mechanized mining face at the second end, and the area where the fully mechanized mining face is located is the inner area.

[0050] It is possible that the twin-drum coal mining machine 10 moves to the second end side of the fully mechanized working face to cut the coal. After moving to the first target position, the twin-drum coal mining machine 10 stops. At this time, if it is the first start of operation, there may be coal wall to be cut between the first target position and the second end, or the entire coal wall may have been cut to form a whole working face, that is, there is no S-bend. The condition of the coal wall at the first target position needs to be judged according to the operation situation. However, the first target position is a reserved position. That is, the twin-drum coal mining machine 10 stops at the first target position and prepares to move towards the first end side to prepare for operation.

[0051] Furthermore, the single-drum coal mining machine 20 is located in the outer area, while the area where the fully mechanized mining face is located is the inner area. This arrangement reduces the amount of coal that accumulates on the side of the second end near the single-drum coal mining machine 20 during the cutting process of the double-drum coal mining machine 10 towards the second end, which would make it difficult for the single-drum coal mining machine 20 to advance. There is no need to leave a machine pit or shunting chamber at the end of the working face. Moreover, the optimized coal mining operation logic of the single-drum coal mining machine 20 and the double-drum coal mining machine 10 effectively solves the problem of multiple S-curves and reduces the load fluctuation problem of the scraper conveyor caused by the fluctuation of coal volume during the pushing process.

[0052] It should be noted here that the single-drum coal mining machine 20 being located in the outer area means that the drum portion of the single-drum coal mining machine 20 is located in the outer area.

[0053] In possible embodiments, such as Figure 1 As shown, the specific control process for the coordinated operation of the double-drum coal mining machine 10 and the single-drum coal mining machine 20 of the present invention is as follows: In step S200, after the double-drum coal mining machine 10 cuts obliquely into the coal wall at the first target position for a first preset distance, it cuts coal to one side of the first end until the coal wall at the first end is cut through. During the above process, the single-drum coal mining machine 20 cuts vertically into the outer area along a direction perpendicular to the coal wall for a first preset distance and cuts coal to one side of the first end, moving at least to the first target position.

[0054] Possibly, after the twin-drum coal mining machine 10 cuts the coal to the first target position, it first cuts obliquely into the coal wall at the first target position for a first preset distance, and then begins to cut the coal to one side of the first end until the coal wall is cut through.

[0055] Understandably, after the twin-drum coal mining machine 10 moves to the first target position, the coal cutting is completed and the coal wall is in a straight line. The twin-drum coal mining machine 10 needs to cut into the coal wall to a cutting depth (generally 0.6~1.0m). The opening for mining the next coal seam is achieved by the oblique cutting, so as to prepare for the excavation of the next coal seam.

[0056] Furthermore, while the double-drum coal miner 10 is cutting coal towards the first end, the single-drum coal miner 20 is vertically advancing in the outer area. The distance of the advance is consistent with the depth of the oblique cutting advance of the double-drum coal miner 10, both being the first preset distance. This setting allows the double-drum coal miner 10 and the single-drum coal miner 20 to start digging the next coal face simultaneously, improving work efficiency. At the same time, the single-drum coal miner 20 can also cut a recess in the coal wall to facilitate the reversal of the double-drum coal miner 10, avoiding the problem of interference caused by the tail of the transfer machine, the end support, and the advance support occupying the roadway space.

[0057] Possibly, after the single-drum coal mining machine 20 makes vertical advances in the outer area, it begins to cut coal towards the first end, moving at least to the first target position, so that in the next coal cutting cycle, after the double-drum coal mining machine 10 moves to the second end to cut coal to the first target position, it can complete the coal mining operation on the same fully mechanized mining face.

[0058] It is possible that after the single-drum coal mining machine 20 makes vertical advances in the outer area, it begins to cut coal towards the first end. However, due to the complex working environment in the roadway, the traveling speed and coal cutting speed of the double-drum coal mining machine 10 may change in the fully mechanized mining face, meaning it may not be able to move to the original first target position within the expected time. There are two possibilities: one is that it reaches the original first target position with a delay, and the other is that it can reach the original first target position quickly in a short time. At this time, the single-drum coal mining machine 20 adjusts the moving distance according to the actual working conditions of the double-drum coal mining machine 10. That is, the first target position is dynamically changing. Taking into account the working conditions of the single-drum coal mining machine 20 and the double-drum coal mining machine 10, the goal is to complete coal mining in the same fully mechanized coal mining face and achieve the best efficiency of the coordinated operation of the single-drum coal mining machine 20 and the double-drum coal mining machine 10.

[0059] It is possible that after the single-drum coal mining machine 20 makes vertical advances in the outer area, it begins to cut coal towards the first end. However, due to the complex working environment in the roadway, the traveling speed and coal cutting speed of the single-drum coal mining machine 20 may change in the fully mechanized mining face, meaning it may not be able to move to the original first target position within the expected time. There are two possibilities: one is that it reaches the original first target position with a delay, and the other is that it can reach the original first target position quickly in a short time. At this time, the single-drum coal mining machine 20 adjusts the moving distance according to the actual working conditions. That is, the first target position is dynamically changing. Taking into account the working conditions of the single-drum coal mining machine 20 and the double-drum coal mining machine 10, the goal is to complete coal mining in the same fully mechanized coal mining face and achieve the best efficiency of coordinated operation between the single-drum coal mining machine 20 and the double-drum coal mining machine 10.

[0060] In possible embodiments, such as Figure 1 As shown, the specific control process for the coordinated operation of the double-drum coal mining machine 10 and the single-drum coal mining machine 20 of the present invention is as follows: In step S300, after the double-drum coal mining machine 10 cuts the coal wall at the first end at a second preset distance, it cuts the coal to the second end until it moves to the second target position, and then cuts the coal to the first end from the second target position until the coal wall at the first end is cut through.

[0061] Possibly, after the double-drum coal miner 10 has cut through the coal wall on one side of the first end, it is ready to start cutting coal in the opposite direction towards the second end. Due to the coordinated operation of the single-drum coal miner 20, the double-drum coal miner 10 has already cut through the first preset distance of coal wall cut by the oblique cutting at the first target position in step S200. At this time, the coal wall is in a straight line. The double-drum coal miner 10 needs to cut into the coal wall to a cutting depth (generally 0.6~1.0m). The oblique cutting has opened the coal seam for mining the next coal seam, so as to prepare for the excavation of the next coal seam.

[0062] Furthermore, after the double-drum coal mining machine 10 cuts obliquely into the coal wall at the first end for a second preset distance, it cuts coal towards the second end until it moves to the second target position. At this time, since the double-drum coal mining machine 10 is cutting obliquely, there is still coal wall to be cut between the second target position and the first end. The double-drum coal mining machine 10 needs to complete the oblique cutting towards the second end and then move towards the first end to complete the cutting of the remaining coal wall. After the double-drum coal mining machine 10 moves to the first end and completes the cutting of the coal wall remaining between the second target position and the first end, it is ready to move towards the second end to start the next coal cutting cycle.

[0063] Understandably, the purpose of setting the second target position is to cut the next coal seam into a relatively complete planar area so that the twin-drum coal miner 10 can cut the next coal seam as a whole.

[0064] In possible embodiments, such as Figure 1 As shown, the specific control process for the coordinated operation of the double-drum coal mining machine 10 and the single-drum coal mining machine 20 of the present invention is as follows: In step S400, steps S100 to S300 are repeated.

[0065] Understandably, after completing steps S100 to S300, the next coal cutting cycle begins.

[0066] It should be noted that, in order to save space, the present invention does not elaborate on the support of the bracket and the pushing process of the scraper conveyor in the above steps S100 to S300 and other steps. However, this does not mean that the above process is not present in the implementation of the present invention. The support and pushing process are implemented as appropriate according to the actual operation. For the parts not described, please refer to the relevant settings in the field.

[0067] In possible embodiments, such as Figure 2 As shown, the specific control process for the coordinated operation of the double-drum coal mining machine 10 and the single-drum coal mining machine 20 of the present invention is as follows: In step S210, the single-drum coal mining machine 20 moves from the first target position to the second end and advances vertically a second preset distance in the outer area along a direction perpendicular to the coal wall.

[0068] It is possible that during the coal cutting operation of the double-drum coal mining machine 10 towards the first end, the single-drum coal mining machine 20 has already completed the coal cutting operation of the remaining coal wall between the second end and the first target position caused by the oblique cutting advance of the double-drum coal mining machine 10 at the first target position. At this time, the single-drum coal mining machine 20 moves from the first target position to the second end. After moving to the outer area, it begins to make a vertical cutting advance of a second preset distance perpendicular to the coal wall. The second preset distance is the distance of the oblique cutting advance of the double-drum coal mining machine 10 from the first end to the second end, that is, the distance to start cutting the next coal seam.

[0069] In possible embodiments, such as Figure 2 As shown, the specific control process for the coordinated operation of the double-drum coal mining machine 10 and the single-drum coal mining machine 20 of the present invention is as follows: In step S220, the single-drum coal mining machine 20 cuts coal to one side of the first end until it moves to the third target position, and a machine nest is formed between the second end and the third target position.

[0070] It is possible that after the single-drum coal mining machine 20 has made a second preset vertical advance, it will start cutting coal to one side of the first end. The distance it moves is to the third target position. The single-drum coal mining machine 20 cuts a recess in the coal wall to facilitate the reversal of the double-drum coal mining machine 10. This avoids the tail of the transfer machine, the end support, and the advance support occupying the roadway space, which would cause the double-drum coal mining machine 10 to interfere with the reversal.

[0071] It is possible that the single-drum coal miner 20 cuts coal to the third target position on one side of the first end because the working environment in the roadway is complex. The traveling speed and coal cutting speed of the double-drum coal miner 10 may change in the fully mechanized mining face, meaning that it cannot move to the original first target position in the expected time. There are two possibilities: one is that it reaches the original first target position with a delay, and the other is that it can reach the original first target position quickly in a short time. In this case, the single-drum coal miner 20 adjusts the moving distance according to the actual working conditions of the double-drum coal miner 10. That is, the first target position is dynamically changing.

[0072] In other words, the third target position that the single-drum coal mining machine 20 moves to to the first end can overlap with the first target position, that is, the machine hole formed by the single-drum coal mining machine 20 cutting coal on the coal face is exactly at the first target position. Alternatively, the third target position can not overlap with the first target position. The length of the machine hole formed at the third target position depends on the possible changes in the travel speed and coal cutting speed of the double-drum coal mining machine 10 in the fully mechanized mining face. The third target position aims to achieve the best efficiency in coordinating the actions of the single-drum coal mining machine 20 and the double-drum coal mining machine 10.

[0073] It should be noted that, in order to save space, the support of the bracket and the pushing process of the scraper conveyor are not described in detail in the above steps S210 to S220 and other steps. However, this does not mean that the above process is not present in the implementation of the present invention. The support and pushing process are implemented as appropriate according to the actual operation. For the parts not described, please refer to the relevant settings in the field.

[0074] In possible embodiments, such as Figure 3 As shown, the specific control process for the coordinated operation of the double-drum coal mining machine 10 and the single-drum coal mining machine 20 of the present invention is as follows: In step S230, when the single-drum coal mining machine 20 moves from the third target position to the second end, the double-drum coal mining machine 10 cuts coal to the second end side and moves at least to the first target position.

[0075] It should be noted that, in order to save space, the support of the bracket and the pushing process of the scraper conveyor are not described in detail in the above-mentioned steps S230 and other steps. However, this does not mean that the above-mentioned processes are not present in the implementation of the present invention. The support and pushing process are implemented as appropriate according to the actual operation. For the parts not described, please refer to the relevant settings in the field.

[0076] This setup may enable the single-drum coal mining machine 20 and the double-drum coal mining machine 10 to work together more efficiently within a single coal cutting cycle, avoiding situations where one of the single-drum coal mining machines 20 moves into place while the other is still moving, or where one coal mining machine waits for the other to be in place, resulting in a long idle time.

[0077] Possibly, due to the different coal cutting efficiencies and coal face conditions faced by the single-drum coal miner 20 and the double-drum coal miner 10, the moving speed and coal cutting speed of the single-drum coal miner 20 and the double-drum coal miner 10 are coordinated and controlled in real time to ensure coordinated operation and reduce idle time.

[0078] In possible embodiments, such as Figure 4 As shown, the specific control process for the coordinated operation of the double-drum coal mining machine 10 and the single-drum coal mining machine 20 of the present invention is as follows: In step S240, the working information of the double-drum coal mining machine 10 in the fully mechanized mining face is obtained, and the third target position is determined based on the working information. The working information includes at least the movement parameters and coal cutting parameters of the double-drum coal mining machine 10.

[0079] Possibly, by acquiring the working information of the double-drum coal mining machine 10 in the fully mechanized mining face, and using the double-drum coal mining machine 10 as a reference, the single-drum coal mining machine 20 can dynamically adjust the movement parameters and coal cutting parameters according to the actual working conditions of the double-drum coal mining machine 10, so as to achieve dynamic adjustment of the third target position and improve the efficiency of collaborative operation.

[0080] It should be noted that, in order to save space, the support of the bracket and the pushing process of the scraper conveyor are not described in detail in the above-mentioned step S240 and other steps. However, this does not mean that the above-mentioned process is not present in the implementation of the present invention. The support and pushing process are implemented as appropriate according to the actual operation. For the parts not described, please refer to the relevant settings in the field.

[0081] In possible embodiments, such as Figure 5 As shown, the specific control process for the coordinated operation of the double-drum coal mining machine 10 and the single-drum coal mining machine 20 of the present invention is as follows: In step S110, after the double-drum coal mining machine 10 cuts the coal wall at an angle for a second preset distance from the starting position, it cuts coal to the second end until it moves to the fourth target position, and then cuts coal to the first end from the fourth target position until the coal wall at the first end is cut through.

[0082] Possibly, when the starting position of the double-drum coal mining machine 10 is not at the first end, and when oblique cutting is required, after the double-drum coal mining machine 10 obliquely cuts into the coal wall at the current position for a second preset distance, the double-drum coal mining machine 10 needs to cut into the coal wall to a cutting depth (generally 0.6~1.0m). The oblique cutting achieves the opening for mining the next coal seam, so as to prepare for the excavation of the next coal seam. Then, it cuts coal to the second end side, moves a distance to the fourth target position, and then starts cutting coal to the first end side until the coal wall at the first end is cut through. The purpose of setting the fourth target position is to form a relatively complete planar area for mining the next coal seam, so that the double-drum coal mining machine 10 can cut the next coal seam as a whole.

[0083] In possible embodiments, such as Figures 6 to 18 The diagram shown illustrates the coal cutting state of the double-drum coal mining machine 10 and the single-drum coal mining machine 20 working together in the fully mechanized mining face method provided by the present invention.

[0084] exist Figures 6 to 18 In the process, the double-drum coal mining machine 10 and the single-drum coal mining machine 20 each begin their respective coal cutting operations according to their current positions, so as to achieve collaborative operation.

[0085] Possibly, such as Figure 6 As shown, the double-drum coal mining machine 10 cuts coal towards the second end.

[0086] Possibly, such as Figure 7 As shown, the double-drum coal mining machine 10 moves to the first target position. At this time, there is still a coal wall to be cut between the first target position and the second end. However, in some embodiments, the double-drum coal mining machine 10 cuts through the coal wall to be cut.

[0087] Possibly, such as Figure 8 As shown, after the double-drum coal mining machine 10 reaches the first target position, it prepares to cut coal to one side of the first end.

[0088] Possibly, such as Figure 9 As shown, after the double-drum coal mining machine 10 cuts the coal wall at an angle for a first preset distance at the first target position, it cuts the coal to one side of the first end.

[0089] Possibly, such as Figure 10 As shown, after the first preset distance of the oblique cutting advance, the double-drum coal mining machine 10 begins to cut coal to one side of the first end.

[0090] Possibly, such as Figure 11 As shown, after the double-drum coal mining machine 10 has made a first preset distance of oblique cutting, it begins to cut coal towards the first end. Meanwhile, the single-drum coal mining machine 20 makes a first preset distance of vertical cutting in the outer area along a direction perpendicular to the coal wall, and prepares to cut coal towards the first end.

[0091] Possibly, such as Figure 12 As shown, after the double-drum coal mining machine 10 has made a first preset distance of oblique cutting, it begins to cut coal towards the first end. Meanwhile, the single-drum coal mining machine 20 makes a first preset distance of vertical cutting in the outer area along a direction perpendicular to the coal wall and cuts coal towards the first end, moving at least to the first target position.

[0092] Possibly, such as Figure 13 As shown, the double-drum coal mining machine 10 cuts coal to one side of the second end until it moves to the first target position. The single-drum coal mining machine 20 is located at the second end in the outer area of ​​the fully mechanized mining face, and the area where the fully mechanized mining face is located is the inner area.

[0093] It should be noted that, since the movement parameters and coal cutting parameters of the double-drum coal mining machine 10 and the single-drum coal mining machine 20 are different, the positions of the double-drum coal mining machine 10 and the single-drum coal mining machine 20 in the fully mechanized mining face will be dynamically adjusted in order to achieve coordinated operation of the double-drum coal mining machine 10 and the single-drum coal mining machine 20 and improve the operation efficiency.

[0094] Possibly, such as Figure 14 As shown, the single-drum coal mining machine 20 advances vertically a first preset distance in the outer area along a direction perpendicular to the coal wall, and cuts coal to one side of the first end, moving at least to the first target position.

[0095] Possibly, such as Figure 15 As shown, the double-drum coal mining machine 10 cuts obliquely into the coal wall at the first end at a second preset distance.

[0096] Possibly, such as Figure 16 As shown, the double-drum coal mining machine 10 cuts coal to one side of the second end until it moves to the second target position.

[0097] Possibly, such as Figure 17 As shown, after the single-drum coal mining machine 20 forms a machine hole by cutting coal, it moves to the second end side, while the double-drum coal mining machine 10 cuts coal to the first end side at the second target position until the coal wall at the first end is cut through.

[0098] Possibly, such as Figure 18 As shown, the double-drum coal mining machine 10 begins to cut coal towards the second end until it moves to the first target position, while the single-drum coal mining machine 20 moves towards the second end.

[0099] In possible embodiments, such as Figures 6 to 18 The diagram shown illustrates the coal cutting state of the double-drum coal mining machine 10 and the single-drum coal mining machine 20 working together in the fully mechanized mining face method provided by the present invention.

[0100] Specifically, in actual operation, there are upward process, downward process, and head process, for example, attached... Figures 6 to 8 Upstream processes and attachments can be adopted. Figures 9 to 14 Using a downlink process, with Figures 15 to 18 The headstock process is adopted.

[0101] Understandably, the up-cutting process refers to mining the lower coal seam first and then the upper coal seam. It is suitable for environments with large inter-layer spacing, low mining height of the lower coal seam, and the need to drain water-bearing strata or treat hard roofs. It can utilize the stable rock strata formed after the lower coal seam is mined to support the upper coal seam, thereby reducing the risk of rock bursts and gas outbursts.

[0102] The down-mining process refers to mining the upper coal seam first and then the lower coal seam. It is suitable for conventional mining of coal seam groups and is characterized by mature technology and simple ventilation and transportation system layout in environments with stable geological conditions.

[0103] In practical applications, additional components may be added as needed. Figures 6 to 8 Adjusted to use downlink process, with attachment Figures 9 to 14 The process was adjusted to an upward flow.

[0104] According to a second aspect of the present invention, a mining system for a fully mechanized mining face is provided for performing the mining method described above for a fully mechanized mining face.

[0105] The present invention will now be described in detail with reference to specific embodiments.

[0106] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to 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 the embodiments of the present invention according to the specific circumstances.

[0107] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0108] In some specific embodiments of the present invention, such as Figures 1 to 18 As shown, this scheme provides a mining method for a fully mechanized mining face, in which a double-drum coal mining machine 10 and a single-drum coal mining machine 20 are set up. The double-drum coal mining machine 10 is set at the first end of the fully mechanized mining face, and the single-drum coal mining machine 20 is set at the second end of the fully mechanized mining face. The methods include: S100, the double-drum coal mining machine 10 cuts coal to one side of the second end until it moves to the first target position. The single-drum coal mining machine 20 is located at the outer area of ​​the fully mechanized mining face at the second end, and the area where the fully mechanized mining face is located is the inner area. S200, after the double-drum coal mining machine 10 cuts obliquely into the coal wall at the first target position for a first preset distance, it cuts coal to one side of the first end until the coal wall at the first end is cut through. During the above process, the single-drum coal mining machine 20 cuts vertically into the outer area in a direction perpendicular to the coal wall for a first preset distance and cuts coal to one side of the first end, at least moving to the first target position. S300, the double-drum coal mining machine 10 cuts the coal wall at the first end at a second preset distance, then cuts the coal to the second end until it moves to the second target position, and cuts the coal to the first end from the second target position until the coal wall at the first end is cut through. S400, repeat steps S100 to S300 above.

[0109] In some possible embodiments of the present invention, step S200 specifically includes: S210, the single-drum coal mining machine 20 moves from the first target position to the second end, and makes a second preset vertical cut in the outer area along a direction perpendicular to the coal wall; S220, the single-drum coal mining machine 20 cuts coal to one side of the first end until it moves to the third target position, and a machine nest is formed between the second end and the third target position.

[0110] Specifically, this embodiment provides an implementation method for a single-drum coal mining machine 20 to cut coal and form a machine nest.

[0111] In some possible embodiments of the present invention, step S220 specifically includes: S230, when the single-drum coal mining machine 20 moves from the third target position to the second end, the double-drum coal mining machine 10 cuts coal to the second end side and moves at least to the first target position.

[0112] Specifically, this embodiment provides a cooperative operation implementation method for a single-drum coal mining machine 20 and a double-drum coal mining machine 10.

[0113] In some possible embodiments of the present invention, step S220 specifically includes: S240: Obtain the working information of the double-drum coal mining machine 10 in the fully mechanized mining face, and determine the third target position based on the working information. The working information includes at least the movement parameters and coal cutting parameters of the double-drum coal mining machine 10.

[0114] Specifically, this embodiment provides another implementation method for the cooperative operation of a single-drum coal mining machine 20 and a double-drum coal mining machine 10.

[0115] In some possible embodiments of the present invention, in step S100, the starting position of the double-drum coal mining machine 10 is the first end.

[0116] Specifically, this embodiment provides an implementation method in which a double-drum coal mining machine 10 is started at the first end.

[0117] Understandably, the starting position for the double-drum coal mining machine 10 to start coal cutting operation is the first end. At this time, when cutting coal at the first end, the machine will decide whether to make an oblique cut to open the next layer of coal face, or to start the operation on the basis of being able to continue cutting coal, depending on the current coal wall condition of the fully mechanized mining face.

[0118] In some possible embodiments of the present invention, in step S100, the starting position of the double-drum coal mining machine 10 is located between the first end and the second end.

[0119] Specifically, this embodiment provides an implementation method for starting the double-drum coal mining machine 10 at a non-first end.

[0120] Understandably, the starting position of the double-drum coal mining machine 10 is selected according to the actual situation in the roadway. It can be started on one side of the first end or at a position between the first and second ends to meet the needs of various working conditions. At the same time, it can be selected whether to make oblique cutting to open the next layer of coal face or to start the operation on the basis of the existing coal cutting capability, depending on the current coal face condition.

[0121] Possibly, when the starting position of the double-drum coal mining machine 10 is the first end and it needs to make oblique cutting, referring to step S300, after the double-drum coal mining machine 10 makes oblique cutting into the coal wall at the first end for a second preset distance, it cuts coal to the second end until it moves to the second target position, and then cuts coal to the first end at the second target position until the coal wall at the first end is cut through.

[0122] In some possible embodiments of the present invention, when the starting position of the double-drum coal mining machine 10 is located between the first end and the second end, it specifically includes: S110, after the double-drum coal mining machine 10 cuts the coal wall at an angle for a second preset distance from the starting position, it cuts the coal to the second end until it moves to the fourth target position, and then cuts the coal to the first end from the fourth target position until the coal wall at the first end is cut through. S120, proceed to step S100.

[0123] Specifically, this embodiment provides an implementation method for the double-drum coal mining machine 10 to cut coal when it is not started at the first end.

[0124] In some possible embodiments of the present invention, the first end is the head end and the second end is the tail end.

[0125] Specifically, this embodiment provides an implementation method for the specific placement of the double-drum coal mining machine 10 and the single-drum coal mining machine 20 in the fully mechanized mining face.

[0126] Understandably, the first end can be the head end and the second end can be the tail end.

[0127] It is possible to set up a machine aisle at the machine head end and an air aisle at the machine tail end.

[0128] The pusher may be located in the machine roadway at the head end of the machine to collect the coal after the coal face has been cut.

[0129] In some possible embodiments of the present invention, the first end is the tail end and the second end is the head end.

[0130] Specifically, this embodiment provides another implementation method for the specific location of the double-drum coal mining machine 10 and the single-drum coal mining machine 20 in the fully mechanized mining face.

[0131] Understandably, the first end can be the tail end, and the second end can be the nose end.

[0132] It is possible to set up a machine aisle at the machine head end and an air aisle at the machine tail end.

[0133] The pusher may be located in the machine roadway at the head end of the machine to collect the coal after the coal face has been cut.

[0134] In some specific embodiments of the present invention, such as Figures 1 to 18 As shown, this solution provides a mining system for a fully mechanized mining face, used to execute the mining method described above for a fully mechanized mining face.

[0135] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.

[0136] Finally, it should be noted that the above embodiments are only for illustrating the present invention and not for limiting the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should be covered within the scope of the claims of the present invention.

Claims

1. A mining method for a fully mechanized longwall face, characterized in that, A double-drum coal mining machine and a single-drum coal mining machine are provided in the fully mechanized mining face. The double-drum coal mining machine is located at the first end of the fully mechanized mining face, and the single-drum coal mining machine is located at the second end of the fully mechanized mining face. The method includes: S100, the double-drum coal mining machine cuts coal to one side of the second end until it moves to the first target position, wherein the single-drum coal mining machine is located in the outer area of ​​the fully mechanized mining face at the second end, and the area where the fully mechanized mining face is located is the inner area; S200, after the double-drum coal mining machine cuts obliquely into the coal wall at the first target position for a first preset distance, it cuts coal to one side of the first end until the coal wall at the first end is cut through. During the above process, the single-drum coal mining machine cuts vertically into the outer area along a direction perpendicular to the coal wall for the first preset distance and cuts coal to one side of the first end, at least moving to the first target position. S300, after the double-drum coal mining machine cuts the coal wall at the first end at an oblique angle for a second preset distance, it cuts the coal to one side of the second end until it moves to the second target position, and then cuts the coal to one side of the first end at the second target position until the coal wall at the first end is cut through. S400, repeat steps S100 to S300 above; Step S200 specifically also includes: S210, the single-drum coal mining machine moves from the first target position to the second end, and makes a second preset vertical advance in the outer region along a direction perpendicular to the coal wall; S220, the single-drum coal mining machine cuts coal to one side of the first end until it moves to the third target position, and a machine nest is formed between the second end and the third target position; Step S220 further includes: S230, when the single-drum coal mining machine moves from the third target position to the second end, the double-drum coal mining machine cuts coal to one side of the second end and moves at least to the first target position.

2. The mining method for a fully mechanized longwall face according to claim 1, characterized in that, Step S220 further includes: S240, Obtain the working information of the twin-drum coal mining machine at the fully mechanized mining face, and determine the third target position based on the working information, wherein the working information includes at least the movement parameters and coal cutting parameters of the twin-drum coal mining machine.

3. The mining method for a fully mechanized longwall face according to claim 1 or 2, characterized in that, In step S100, the starting position of the double-drum coal mining machine is the first end.

4. The mining method for a fully mechanized longwall face according to claim 1 or 2, characterized in that, In step S100, the starting position of the double-drum coal mining machine is located between the first end and the second end.

5. The mining method for a fully mechanized longwall face according to claim 4, characterized in that, When the starting position of the double-drum coal mining machine is located between the first end and the second end, it specifically includes: S110, after the double-drum coal mining machine cuts the coal wall at the starting position by a second preset distance, it cuts coal to the second end side until it moves to the fourth target position, and cuts coal to the first end side at the fourth target position until the coal wall at the first end is cut through. S120, proceed to step S100.

6. The mining method for a fully mechanized longwall face according to claim 1 or 2, characterized in that, The first end is the head end, and the second end is the tail end.

7. The mining method for a fully mechanized longwall face according to claim 1 or 2, characterized in that, The first end is the tail end, and the second end is the head end.

8. A mining system for a fully mechanized longwall face, characterized in that, Mining method for performing the fully mechanized mining face as described in any one of claims 1 to 7.

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