Vertical feed coal mining process

Abstract

The invention relates to a vertical feed coal mining process. In order to solve the problems of reciprocating operation, complex track, process redundancy and the like of a coal mining machine in a traditional beveling feed process, the process innovatively adopts a vertical feed mode: firstly, a conveyor is pushed in front of a coal wall to form an S bend; vertical feeding with cooperation of roller stretching and rocker arm swinging is executed in the end area of the conveyor; after the conveyor is pushed to be straight, a vertical drum coal mining machine linearly runs for cutting; the cutting depth is adjusted in the end area, and the coal wall is cut through; and finally, the next cycle is seamlessly connected. According to the scheme, the processes of beveling feed, triangular coal cutting and reverse coal sweeping are omitted in a breakthrough mode, and coal can be continuously cut without going back and forth at a time. The method has the advantages that the coal mining process is simplified, and the equipment ineffective stroke is eliminated; the working face propulsion efficiency is improved. The process is suitable for various coal seam conditions, and provides core technical support for efficient and intensive mining of coal mines.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mining, in particular to a vertical cutting coal mining process. BACKGROUND

[0002] As the core link of energy supply, the process efficiency of coal mining directly affects the resource development benefit. The oblique cutting process widely used in traditional underground coal mining is a mature technology. This process requires the coal mining machine to run a specific oblique cutting trajectory and handle the triangular coal in the end area. There are many cases of coal mining machine round trips and process steps in the process. This operation mode produces more auxiliary trips and increases the complete coal mining cycle operation time. At the same time, the relatively complex process connection also leads to the loss of operation efficiency, and there is a clear optimization demand. Although the industry continues to optimize this process, most schemes still improve within its basic framework. Therefore, the industry is still exploring new processes that can further simplify the running trajectory and reduce auxiliary trips to pursue further improvement of the continuity and efficiency of coal mining.

[0003] Therefore, the prior art still needs further development. SUMMARY

[0004] The purpose of the present application is to overcome the above technical deficiencies and provide a vertical cutting coal mining process to solve the problems existing in the prior art.

[0005] To achieve the above technical purpose, the present application provides a vertical cutting coal mining process, comprising: a) in front of the running direction of the coal mining machine, the hydraulic support pushes the conveyor to form an S-bend at a certain distance from the coal wall; b) the vertical drum coal mining machine located in the head or tail area of the conveyor performs vertical cutting operation; c) the hydraulic support in the end area performs the action of pushing the conveyor to straighten it; d) the vertical drum coal mining machine runs straight on the straightened conveyor to cut coal; e) adjust the cutting depth of the front drum in the tail or head area of the conveyor; f) cut through the end wall, and then the coal mining machine changes direction to enter the next cycle.

[0006] Specifically, the vertical cutting in step b) includes the extension and retraction of the upper and lower side telescopic drums of the coal mining machine, the up and down swing of the rocker arm, and the adjustment of the cutting depth of the drum.

[0007] Specifically, the up and down swing of the rocker arm is used to adjust the cutting trajectory of the drum.

[0008] Specifically, the straight running in step d) includes the follow-up pull frame action of the hydraulic support in sequence.

[0009] Specifically, the straight-line operation in step d) further includes the extension and retraction of the upper and lower side telescopic drums and the up-and-down swing of the swing arm to adapt to the change of the coal seam.

[0010] Specifically, the operation of adjusting the cutting depth in step e) is performed at the tail or head area of the conveyor and at a certain distance from the coal wall.

[0011] Specifically, the operation of adjusting the cutting depth in step e) further includes the extension and retraction of the upper and lower side telescopic drums and the up-and-down swing of the swing arm to control the cutting height and the amount of laying on the bottom.

[0012] Specifically, the cutting through the coal wall in step f) includes the extension and retraction of the front drum in cooperation with the telescopic drum and the up-and-down swing of the swing arm to ensure complete cutting through the root of the coal wall.

[0013] Specifically, the distance of forming the S-bend in step a) is greater than the length of the coal mining machine to provide operating space for vertical tool advancement.

[0014] Specifically, the entering of the next cycle in step f) includes the vertical drum coal mining machine driving from the tail to the head or from the head to the tail.

[0015] Advantages: Compared with the prior art, the vertical tool advancement coal mining process provided by the present application brings innovation in the process. The core feature is the use of vertical tool advancement, which eliminates the processes of oblique cutting, special cutting of triangular coal, and reverse coal sweeping in the traditional oblique cutting process. This allows the coal mining machine to run straight in a single direction to complete the cutting of a single pass of coal, avoiding the empty running of the equipment back and forth. The process simplifies the operation process at the end area, reduces the total running distance and time required for the coal mining machine to complete a coal mining cycle. The simplification of the process helps to reduce the complexity of the operation and may reduce the energy consumption of the equipment due to auxiliary actions. The present application provides a new technical choice for improving the efficiency of the working face. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A block diagram of the vertical coal mining tool advancement process in the specific embodiment of the present application is shown; Figure 2 A structural schematic diagram of the vertical drum coal mining machine in phase 1 is shown in the specific embodiment of the present application; Figure 3 A structural schematic diagram of the vertical drum coal mining machine in phase 2 is shown in the specific embodiment of the present application; Figure 4 A structural schematic diagram of the vertical drum coal mining machine in phase 3 is shown in the specific embodiment of the present application; Figure 5Fig. 4 shows a structural schematic diagram of the vertical drum coal mining machine in the phase 4 state in the embodiment of the present application; Figure 6 Fig. 5 shows a structural schematic diagram of the vertical drum coal mining machine in the phase 5 state in the embodiment of the present application; Figure 7 Fig. 6 shows a structural schematic diagram of the vertical drum coal mining machine in the phase 6 state in the embodiment of the present application. DETAILED DESCRIPTION

[0017] In order to make the technical solutions of the present application better understood by the people in the field, the technical solutions of the present application are described clearly and completely below in combination with the drawings of the present application. Other similar embodiments obtained by the people in the field without making creative efforts based on the embodiments in the present application shall all belong to the scope of protection of the present application. In addition, the direction words mentioned in the following embodiments, such as "up", "down", "left" and "right", are only the directions of the drawings, and therefore, the direction words used are used for illustration but not for limiting the present application.

[0018] The present application is further described below in combination with the drawings and the preferred embodiments. Please refer to Figure 1 The present application provides a vertical cutting coal mining process, which comprises: a) pushing the conveyer by the hydraulic support in front of the running direction of the coal mining machine to form an S-bend at a distance greater than the length of the coal mining machine from the coal wall, which needs to provide enough operation space for the vertical cutting to avoid the interference of the equipment; b) the vertical drum coal mining machine located in the head or tail area of the conveyer performs the vertical cutting, in which process, the up and down telescopic drums of the coal mining machine are telescoped, the swing arm is swung up and down, and the cutting depth of the drum is adjusted to cooperatively complete the cutting action; c) the pushing conveyer action is performed by the hydraulic support in the end area to push the conveyer straight; d) the vertical drum coal mining machine runs straight on the straightened conveyer to cut coal, in which process, the hydraulic support sequentially performs the frame pulling action, and meanwhile, the coal mining machine can perform the telescoping of the telescopic drum and the swinging of the swing arm up and down according to the coal seam condition; e) when the coal mining machine runs to the tail or head area of the conveyer and is at a certain distance from the coal wall, the cutting depth of the front drum is adjusted, in which process, the cutting height and the bottoming amount can also be controlled by the telescoping of the telescopic drum and the swinging of the swing arm; f) the coal mining machine continues to run to the end, the front drum cuts through the coal wall, and the cycle is completed; then the coal mining machine reverses to enter the next cycle.

[0019] It can be understood that the beneficial effects of the above-mentioned scheme include that the formation of the S-bend avoids the repeated adjustment of the position in the traditional process, saves the preparation time, and provides a safe operation space for the vertical cutting.

[0020] The workflow of the present application is illustrated below by a specific example, taking a coal seam of a mine as an example: 1. The hydraulic support pushes the conveyor to form an S-bend at a certain distance from the coal wall; 2. At the machine head position, the vertical drum shearer performs vertical cutting, the telescopic drum is extended, the rocker arm swings, and the cutting depth is adjusted; 3. The end hydraulic support pushes the conveyor straight; 4. The shearer cuts coal in a straight line, the support follows the machine to pull the support, and the shearer rocker arm and telescopic drum are dynamically adjusted to adapt to the coal seam; 5. When approaching the tail of the machine, adjust the cutting depth of the front drum, and control the swing of the rocker arm to adjust the mining height and the amount of laying bottom; 6. At the machine tail position, cut through the coal wall at low speed; 7. The shearer reverses direction and starts the next cycle.

[0021] It can be understood that, in order to solve the problem of reciprocating operation of the shearer on the fully mechanized and fully mechanized working face to cut coal, the trajectory is complex, the operation time of the shearer is reduced, and the mining efficiency is improved, the present application provides a vertical cutting shearing process.

[0022] As shown in Figure 1 , the vertical cutting shearing process includes: the conveyor is pushed by the support in front of the running direction of the shearer, and an S-bend is formed at a distance greater than the length of the shearer from the coal wall. The vertical drum shearer located at the head (or tail) area of the conveyor performs vertical cutting. The end hydraulic support pushes the conveyor straight. The vertical drum shearer runs straight on the straightened conveyor towards the tail (or head), and the hydraulic support sequentially performs the action of following the machine to pull the support. When running to a certain distance from the coal wall at the tail (or head) area of the conveyor, the cutting depth of the front drum is adjusted. The vertical drum shearer runs straight to the tail (or head), and the front drum cuts through the coal wall. The vertical drum shearer reverses direction and enters the next cycle.

[0023] Further, in the step of the vertical drum shearer located at the head (or tail) area of the conveyor performing vertical cutting, the upper and lower telescopic drums of the shearer are telescoped, the rocker arm is swung up and down, and the drum cutting depth is adjusted.

[0024] Further, in the step of the vertical drum shearer running straight, the upper and lower telescopic drums of the shearer are telescoped and the rocker arm is swung up and down to adapt to the coal seam.

[0025] Further, in the step of adjusting the cutting depth of the front drum, the upper and lower telescopic drums of the shearer are telescoped and the rocker arm is swung up and down to control the mining height and the amount of laying bottom.

[0026] Further, the step of the front roller cutting through the coal wall further comprises: the upper and lower telescopic rollers of the coal mining machine are telescoped and the swing arm is swung up and down to ensure complete cutting through.

[0027] Specifically, the vertical cutting coal mining process of the present application adopts a vertical cutting method at the end region to cut coal, so as to realize the whole cutting process cycle and further realize uninterrupted cutting of the coal seam and improve the coal mining efficiency.

[0028] In the specific embodiment shown in Figures 2 to 7 The number of supports is not limited: Stage 1, initial state, the vertical roller coal mining machine is located in the machine head (tail) region, the coal mining machine is operated in front of the support pusher conveyor, and an S-bend is formed at a distance greater than the length of the whole coal mining machine from the coal wall.

[0029] Stage 2, the vertical roller coal mining machine located in the machine head (tail) region of the conveyor performs vertical cutting, the roller is telescoped after extending out of the support top beam, the roller is telescoped, the swing arm is swung up or down, and the cutting of the coal seam is realized by the coordinated action.

[0030] Stage 3, the left vertical roller cuts the full depth of cut, and the right roller cuts part of the depth of cut.

[0031] Stage 4, the hydraulic support in the machine head region performs the pusher conveyor action to push the conveyor straight.

[0032] Stage 5, the vertical roller coal mining machine runs straight to the machine tail (head), and at the same time, the roller is telescoped, the swing arm is swung up or down, and the coal seam is cut by the coordinated action. The hydraulic support sequentially performs the machine following action.

[0033] Stage 6, the vertical roller coal mining machine runs straight to the machine tail region of the conveyor at a certain distance from the coal wall, the front roller performs cutting depth adjustment. At the same time, the roller is telescoped, the swing arm is swung up or down, and the cutting height and the bottoming amount are controlled by the coordinated action.

[0034] Stage 7, the vertical roller coal mining machine runs straight to the machine tail (head) of the conveyor, the front roller cuts through the coal wall, and at the same time, the roller is telescoped, the swing arm is swung up or down, and the coal wall root is cut through by the coordinated action. All supports complete the action of pulling the support.

[0035] Stage 8, the vertical roller coal mining machine reverses the traction to perform stage 1 action for the next cycle.

[0036] From the above description, it can be seen that the above-mentioned embodiments of the present application embody the following technical effects: by applying the technical scheme of the present application, the vertical cutting coal mining process of the present application adopts the vertical cutting mode in the end area to cut the coal seam, so as to realize the circulation of the whole cutting process, and further realize the uninterrupted cutting of the coal seam, simplify the coal mining process, cancel the inclined cutting, cutting the triangular coal, and the reverse coal sweeping and other coal mining processes. The coal mining machine realizes one-time cutting of the coal without back and forth, solves the problem of vertical cutting, and improves the coal mining efficiency.

[0037] The technical features described above can be combined arbitrarily. Although all possible combinations of these technical features are not described, any combination of these technical features should be considered to be covered by the present specification, as long as there is no contradiction in such combination.

[0038] The specific embodiments of the present application described above do not constitute a limitation on the scope of protection of the present application. Any various other corresponding changes and modifications made according to the technical concept of the present application should be included in the scope of protection of the claims of the present application.

Claims

1. A vertical feed coal mining process, characterized in that, include: a) In front of the coal mining machine's running direction, the conveyor is pushed by hydraulic supports to form an S-curve at a certain distance from the coal face; b) Vertical drum coal mining machines located in the head or tail area of ​​the conveyor shall perform vertical feed operations; c) The hydraulic supports in the end area perform the pushing action of the conveyor, pushing the conveyor straight; d) The vertical drum coal mining machine cuts coal by running in a straight line on the already straightened conveyor. e) Adjust the cutting depth of the front roller in the tail or head area of ​​the conveyor; f) Cut through the coal face at the end, and then the mining machine changes direction to enter the next cycle.

2. The process according to claim 1, characterized in that, The vertical feed in step b) includes the extension and retraction of the upper and lower telescopic drums of the coal mining machine, the up and down swing of the rocker arm, and the adjustment of the drum cutting depth.

3. The process according to claim 2, characterized in that, The up-and-down swing of the rocker arm is used to adjust the cutting trajectory of the drum.

4. The process according to claim 1, characterized in that, The linear movement in step d) includes the sequential pulling action of the hydraulic support following the machine.

5. The process according to claim 4, characterized in that, The linear operation in step d) also includes the extension and retraction of the upper and lower telescopic drums of the coal mining machine and the up and down swinging of the rocker arm to adapt to changes in the coal seam.

6. The process according to claim 1, characterized in that, The operation of adjusting the cutting depth in step e) is performed in the tail or head area of ​​the conveyor and at a certain distance from the coal wall.

7. The process according to claim 6, characterized in that, Step e) adjusting the cutting depth also includes extending and retracting the upper and lower telescopic drums of the coal mining machine and swinging the rocker arm up and down to control the mining height and the bottom depth.

8. The process according to claim 7, characterized in that, Step f) involves cutting through the coal wall, which includes the extension and retraction of the front drum in conjunction with the telescopic drum and the up-and-down swinging motion of the rocker arm, to ensure that the root of the coal wall is completely cut through.

9. The process according to claim 1, characterized in that, In step a), the distance of the S-bend is greater than the length of the coal mining machine to provide operating space for vertical cutting.

10. The process according to claim 1, characterized in that, Step f) involves the vertical drum coal mining machine moving from the tail to the head or from the head to the tail.

Images