Multi-cutting-device collaborative coal cutting non-beveling feed system

Abstract

The invention discloses a multi-cutting-device collaborative coal cutting non-beveling feed system which comprises a machine nest cutting device and a scraper conveyor, the machine nest cutting device comprises a traction part, a rotating arm and a cutting roller, the cutting roller is arranged at the first end of the rotating arm, and the scraper conveyor is arranged at the second end of the rotating arm. The second end of the rotating arm is pivotally connected with the traction part, the rotating arm is used for driving the cutting roller to move relative to the coal seam, the extending direction of the scraper conveyor is perpendicular to the advancing direction of the working face, the two ends of the scraper conveyor are each provided with a machine nest cutting device, and the traction part of each machine nest cutting device moves along the scraper conveyor; the drum shearer is arranged in the middle of the scraper conveyor and used for cutting a coal seam, and the hydraulic support is arranged on the side, away from the working face, of the scraper conveyor and used for supporting a top plate. The multi-cutting-device collaborative coal cutting non-beveling feed system provided by the invention has the advantages of high cutting efficiency and small influence on the original process.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent coal mining, and in particular to a system for collaborative coal cutting with multiple cutting devices without oblique cutting. Background Art

[0002] Implementing intelligent, unmanned mining in coal mining faces is key to building intelligent coal mines. Currently, coal mining faces primarily rely on a rocker-type drum shearer for cutting and dropping coal. This mechanical structure and cutting process require the shearer to perform oblique cuts at both ends of the face. This results in complex cutting processes, low cutting speeds, low efficiency, and significant difficulty in intelligent control. This makes it difficult to achieve regular intelligent, unmanned mining in coal mining faces, hindering the development of intelligent coal mines. Summary of the Invention

[0003] The present invention aims to address, at least to some extent, one of the technical problems in the related art. To this end, embodiments of the present invention provide a system for collaboratively cutting coal with multiple cutting devices without an oblique feed. This system has the advantages of high cutting efficiency and minimal impact on existing processes.

[0004] According to an embodiment of the present invention, a multi-cutting device cooperative coal cutting system without oblique cutting feed includes a machine nest cutting device and a scraper conveyor, the machine nest cutting device includes a traction part, a rotating arm and a cutting drum, the cutting drum is arranged at the first end of the rotating arm, the second end of the rotating arm is pivotally connected to the traction part, the traction part is used to drive the rotating arm and the cutting drum to move, the cutting drum is used to cut the coal seam, and the rotating arm is used to drive the cutting drum to move relative to the coal seam, the extension direction of the scraper conveyor is perpendicular to the advancing direction of the working face, one machine nest cutting device is arranged at each end of the scraper conveyor, the traction part of the machine nest cutting device moves along the scraper conveyor, and a roller coal mining machine is arranged in the middle of the scraper conveyor to cut the coal seam, and a hydraulic support is arranged on the side of the scraper conveyor away from the working face for roof support.

[0005] The multi-cutting device cooperative coal cutting non-oblique feed system according to the embodiment of the present invention has the advantages of high cutting efficiency and little impact on the original process. The present application has the following advantages: the machine nest cutting device is applied at both ends of the coal mining working face to cut out the feed space of the drum coal mining machine, which enables the drum coal mining machine to perform non-oblique feed at both ends of the working face, and the coal cutting at both ends and the coal cutting in the middle of the working face are parallel. The feed process is simple, the cutting efficiency is high, it is easy to realize normalized intelligent unmanned mining, there is no need to add supporting support and transmission equipment to the cutting device, the cost of modification is low, and it is easy to promote and popularize.

[0006] In some embodiments, the diameter of the cutting drum is smaller than the mining height of the drum shearer at the working face, and the diameter of the cutting drum is larger than 1 / 3 of the mining height of the drum shearer at the working face.

[0007] In some embodiments, the diameter of the cutting drum is 1 / 2 to 1 / 3 of the mining height of the working face.

[0008] In some embodiments, the rotating arm is located on a side of the traction portion adjacent to an end of the scraper conveyor to reduce the space occupied by the lane.

[0009] According to an embodiment of the present invention, a process for collaboratively cutting coal with multiple cutting devices without oblique cutting feed includes the following steps:

[0010] S1. The two ends of the working surface are respectively at the upper end position and the lower end position, and the two machine nest cutting devices on the scraper conveyor are pulled to the upper end position and the lower end position, and the cutting drums of the two machine nest cutting devices enter the lanes at both ends of the working surface respectively;

[0011] S2, pushing the scraper conveyor at the lower end position of the working surface, and the machine nest cutting device at the lower end position directly feeds and cuts;

[0012] S3, the machine nest cutting device at the lower end position reciprocates to cut coal to form a machine nest;

[0013] S4, pulling the drum coal shearer into the machine nest at the lower end position;

[0014] S5, pushing the scraper conveyor so that the distance between the scraper conveyor and the working surface is equal, and the cutting device at the upper end position is ready for feeding;

[0015] S6. Pull the hydraulic support to support the roof, and the cutting device at the upper end and the drum shearer move toward each other to cut coal;

[0016] S7, pushing the scraper conveyor at the upper end position and pulling the hydraulic support, and the machine nest cutting device at the upper end position directly feeds and cuts;

[0017] S8, the machine nest cutting device at the upper end position reciprocates to cut coal to form a machine nest;

[0018] S9, pulling the drum coal shearer into the machine nest area at the upper end position;

[0019] S10, pushing the scraper conveyor so that the distance between the scraper conveyor and the working surface is equal, and the cutting device at the lower end position is ready for feeding;

[0020] S11, pulling the hydraulic support to support the roof, and the machine nest cutting device at the lower end position and the drum coal shearer move towards each other to cut coal;

[0021] S12, pushing the scraper conveyor at the lower end position and pulling the hydraulic support, and the machine nest cutting device at the lower end position directly feeds and cuts;

[0022] S13, the machine nest cutting device at the lower end position reciprocates to cut coal to form a machine nest;

[0023] S14, pulling the drum coal shearer into the machine nest area at the lower end position;

[0024] S15, pushing the scraper conveyor so that the distance between the scraper conveyor and the working surface is equal, and the cutting device at the lower end position is ready for feeding;

[0025] S16. Repeat S006-S015 to continuously complete coal cutting at the coal mining face.

[0026] In some embodiments, the S3 step further includes pulling the hydraulic support to support the top plate, pulling the machine nest cutting device to a corresponding position so that its cutting drum enters the tunnel next to the working surface.

[0027] In some embodiments, the S8 step further includes pulling the cutting drum of the machine nest cutting device into the lane beside the working surface after the cutting is completed by moving the cutting device to the upper end position.

[0028] In some embodiments, the length of the straight section of the scraper conveyor after pushing in step S2 is L, the length of the drum coal mining machine is L1, and the length of the machine nest cutting device is L2, L>(1.2×L1+L2) to ensure that the rocker arm drum coal mining machine can directly feed, and the length of the curved section of the scraper conveyor in steps S6 and S11 is L3, then the distance the machine nest cutting device cuts the coal is L+L3.

[0029] In some embodiments, the diameter of the cutting drum is 1 / 2 to 1 / 3 of the mining height of the working face, and the cutting drum reciprocates to cut the coal four times. The first three operations of the four operations cut the coal seam, and the fourth operation is for coal loading.

[0030] In some embodiments, the cutting depth of the cutting drum of the machine nest cutting device is equal to the cutting depth of the drum coal mining machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of a system for collaborative coal cutting without oblique cutting by multiple cutting devices according to an embodiment of the present invention.

[0032] Figure 23. It is a schematic diagram of the usage status of the system for collaboratively cutting coal without oblique cutting according to an embodiment of the present invention.

[0033] Figure 3 It is a structural schematic diagram of a machine nest cutting device in which multiple cutting devices cooperate to cut coal without an oblique cutting feed system according to an embodiment of the present invention.

[0034] Figure 4 It is a schematic diagram of the initial state of the working surface of the multi-cutting device collaboratively cutting coal without an oblique cutting process according to an embodiment of the present invention.

[0035] Figure 5 It is a schematic diagram of the working surface in which the machine nest cutting device is in place and multiple cutting devices cooperate to cut coal without an oblique cutting process according to an embodiment of the present invention.

[0036] Figure 6 It is a schematic diagram of the working surface of a push scraper conveyor in which multiple cutting devices cooperate to cut coal without an oblique cutting process according to an embodiment of the present invention.

[0037] Figure 7 It is a schematic diagram of the working surface of the machine nest cutting device forming a machine nest and pulling the hydraulic support according to the machine nest cutting process of the multi-cutting device cooperating to cut coal without oblique cutting in an embodiment of the present invention.

[0038] Figure 8 It is a schematic diagram of the working face of a drum coal shearer entering the machine pit in which multiple cutting devices cooperate to cut coal without an oblique cutting feed process according to an embodiment of the present invention.

[0039] Figure 9 It is a schematic diagram of the working surface of a push scraper conveyor in which multiple cutting devices cooperate to cut coal without an oblique cutting process according to an embodiment of the present invention.

[0040] Figure 10 It is a schematic diagram of the working surface of the pulling hydraulic support in which multiple cutting devices cooperate to cut coal without an oblique cutting process according to an embodiment of the present invention.

[0041] Figure 11 It is a schematic diagram of the working surface in which the machine nest cutting device and the drum coal shearer move toward each other in a non-oblique cutting process in which multiple cutting devices cooperate to cut coal according to an embodiment of the present invention.

[0042] Figure 12 It is a schematic diagram of the working surface of the scraper conveyor with the upper end moved in a process of cutting coal without oblique cutting with multiple cutting devices in an embodiment of the present invention.

[0043] Figure 13 It is a schematic diagram of the working surface of the hydraulic support for pulling the upper end head in a process of cutting coal without oblique cutting with multiple cutting devices in an embodiment of the present invention.

[0044] Figure 14It is a schematic diagram of the working surface in which the upper end head forms a machine nest in a process in which multiple cutting devices cooperate to cut coal without oblique cutting according to an embodiment of the present invention.

[0045] Figure 15 It is a schematic diagram of the working face of a drum coal shearer entering the machine nest of the upper end head in which multiple cutting devices cooperate to cut coal without an oblique cutting feed process according to an embodiment of the present invention.

[0046] Figure 16 It is a schematic diagram of the working surface of a push scraper conveyor in a straight line state in which multiple cutting devices cooperate to cut coal without an oblique cutting process according to an embodiment of the present invention.

[0047] Figure 17 It is a schematic diagram of a working surface in which a pulling hydraulic support is in a straight line state in a process of cutting coal without oblique cutting with multiple cutting devices in an embodiment of the present invention.

[0048] Figure 18 It is a schematic diagram of a working surface in which multiple cutting devices cooperate to cut coal without an oblique cutting process and the lower end head completes cutting according to an embodiment of the present invention.

[0049] Figure 19 It is a schematic diagram of the working surface of a scraper conveyor with a pushed lower end in a process of cutting coal with multiple cutting devices in coordination without an oblique cutting feed according to an embodiment of the present invention.

[0050] Figure 20 It is a schematic diagram of the working surface of the hydraulic support for pulling the lower end head in a process of cutting coal without oblique cutting with multiple cutting devices in an embodiment of the present invention.

[0051] Figure 21 It is a schematic diagram of the working surface in which the lower end of a machine nest is formed by the collaborative coal cutting process of multiple cutting devices without oblique cutting according to an embodiment of the present invention.

[0052] Figure 22 It is a schematic diagram of the working face of a drum coal shearer entering the lower end machine nest in which multiple cutting devices cooperate to cut coal without an oblique cutting feed process according to an embodiment of the present invention.

[0053] Figure numerals: 1. Machine nest cutting device; 11. Traction part; 12. Rotating arm; 13. Cutting drum; 2. Drum coal mining machine; 3. Scraper conveyor; 4. Hydraulic support; 5. Transport tunnel; 6. Return air tunnel; 7. Upper end; 8. Lower end. DETAILED DESCRIPTION

[0054] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0055] According to an embodiment of the present invention, a multi-cutting device cooperative coal cutting system without oblique cutting and feed includes a machine nest cutting device 1 and a scraper conveyor 3. The machine nest cutting device 1 includes a traction part 11, a rotating arm 12 and a cutting drum 13. The cutting drum 13 is arranged at a first end of the rotating arm 12, and the second end of the rotating arm 12 is pivotally connected to the traction part 11. The traction part 11 is used to drive the rotating arm 12 and the cutting drum 13 to move, and the cutting drum 13 is used to cut the coal seam. The rotating arm 12 is used to drive the cutting drum 13 to move relative to the coal seam. The extension direction of the scraper conveyor 3 is perpendicular to the advancing direction of the working face. A machine nest cutting device 1 is arranged at each end of the scraper conveyor 3. The traction part 11 of the machine nest cutting device 1 moves along the scraper conveyor 3. A roller coal mining machine 2 is arranged in the middle of the scraper conveyor 3 to cut the coal seam. The hydraulic support 4 is arranged on the side of the scraper conveyor 3 away from the working face for roof support. The traction unit 11 is the power source for the machine nest cutting device 1. Through its pivotable connection to the rotating arm 12, the traction unit 11 flexibly drives the rotating arm 12 and the cutting drum 13 along the scraper conveyor 3. The rotating arm 12 is rotatably connected to the traction unit 11. Rotating the rotating arm 12 relative to the traction unit 11 adjusts the height of the cutting drum 13, thereby changing the cutting height and achieving accurate cutting of the coal seam. The cutting drum 13 can adjust its angle during movement based on the undulations of the coal seam and the actual working surface conditions, thereby better adapting to complex coal mining environments. The rotating arm 12 is of a certain length and strength to ensure sufficient extension and stability for the cutting drum 13 during operation, while also being able to withstand significant cutting forces and vibrations. The cutting drum 13 is a key component that directly contacts and cuts the coal seam. The cutting drum 13 can be made of high-strength steel and is equipped with cutting teeth on its surface, which enable rapid cutting of the coal seam during rotation. The cutting drum 13 is arranged at the first end of the rotating arm 12, so that it can better utilize the support of the rotating arm 12 and the power of the traction part 11 when working, and realize efficient cutting operations. The machine nest cutting device 1 can cut the two ends of the working surface from the transport tunnel 5 and the return air tunnel 6 on both sides of the working surface through the cooperation of the traction part 11, the rotating arm 12 and the cutting drum 13. The extended range of the rotating arm 12 reduces the space occupied by the traction part 11 in the tunnels on both sides, making it more flexible. The machine nest cutting device 1 avoids the difficulty of the drum coal mining machine 2 located in the middle of the working surface to cut obliquely and improve the coal mining efficiency. The traction part 11 of the machine nest cutting device 1 moves on the scraper conveyor 3 and is located in the same column as the drum coal mining machine 2, which simplifies the equipment and does not require another moving path equipment and support equipment for the machine nest cutting device 1, thereby reducing the number of equipment, streamlining the moving process and improving efficiency.

[0056] In some embodiments, the diameter of the cutting drum 13 is smaller than the mining height of the drum shearer 2 at the working face, and the diameter of the cutting drum 13 is larger than 1 / 3 of the mining height of the drum shearer 2 at the working face.

[0057] Specifically, the drum shearer 2 can be a rocker-arm drum shearer 2. The diameter of the cutting drum 13 should be smaller than the mining height of the drum shearer 2 at the working face, so that the cutting drum 13 can be flexibly operated within the operating range of the drum shearer 2 and the cutting drum 13 is prevented from being too large and interfering with the normal operation of the drum shearer 2. In addition, if the cutting drum 13 is too large in diameter, it will be difficult to enter the transport tunnel 5 and return air tunnel 6 on both sides of the working face, and it will not be able to cut from both sides, which will affect the cutting efficiency and cutting effect. If the diameter of the cutting drum 13 is too small (less than 1 / 3 of the mining height), it may result in low cutting efficiency and ineffective cutting of the coal seam. It may even damage the cutting teeth or the drum due to the small contact area between the cutting teeth and the coal seam. In addition, if the diameter of the cutting drum 13 is too small, it will increase the number of reciprocating coal cutting times of the cutting drum 13 at the end 7 or lower end of the working face, affecting the efficiency of the machine nest formation and significantly affecting the original process of the drum shearer 2. The cutting drum 13 can cover a larger coal seam cutting area when rotating while maintaining sufficient cutting depth and strength.

[0058] In some embodiments, the diameter of the cutting drum 13 is 1 / 2 to 1 / 3 of the mining height of the working face.

[0059] Specifically, the cutting drum 13 is used to process areas that are difficult for the drum coal mining machine 2 to reach, optimize the overall coal mining process, and improve coal mining efficiency and quality. The diameter of the cutting drum 13 is controlled within the target range to ensure that it can effectively cut the coal seam when rotating, avoiding low cutting efficiency due to small size, and avoiding collision or interference with the drum coal mining machine 2 during the coal mining process, thereby ensuring the safe operation of the equipment.

[0060] In some embodiments, the rotating arm 12 is located on one side of the traction portion 11 adjacent to the end of the scraper conveyor 3 to reduce the space occupied by the lane.

[0061] Specifically, when the rotating arm 12 is arranged on the side of the traction part 11 adjacent to the end of the scraper conveyor 3, the rotating arm 12 is closer to the transport tunnel 5 and the return air tunnel 6 on both sides of the working surface, making it easier for the cutting drum 13 to enter the tunnel while the traction part 11 stays on the scraper conveyor 3. The rotating arm 12 is arranged in a position close to the tunnel, and its rotation range can cover the tunnel and the working surface. This allows the cutting drum 13 to move flexibly between the tunnel and the working surface to complete various cutting tasks without the need for the traction part 11 to enter the tunnel to increase the rotation range of the rotating arm 12, avoiding the traction part 11 occupying the tunnel space and ensuring the smooth flow of the tunnel. In addition, the rotating arm 12 allows the cutting drum 13 to quickly enter the tunnel for cutting, reducing the equipment's movement time and operational complexity, and can better adapt to complex coal mining environments and task requirements.

[0062] According to an embodiment of the present invention, a process for collaboratively cutting coal with multiple cutting devices without oblique cutting feed includes the following steps:

[0063] S1, the two ends of the working surface are respectively at the upper end 7 position and the lower end position, the two machine nest cutting devices 1 on the scraper conveyor 3 are pulled to the upper end 7 position and the lower end position, and the cutting drums 13 of the two machine nest cutting devices 1 enter the lanes at both ends of the working surface respectively; Figure 4 and Figure 5 As shown, the machine nest cutting device 1 is pulled to both ends of the working surface to prepare for subsequent coal cutting operations, ensuring that the cutting drum 13 can smoothly enter the tunnel and provide conditions for subsequent feed operations.

[0064] S2, push the scraper conveyor 3 at the lower end position of the working surface, and the machine nest cutting device 1 at the lower end position directly feeds the cutting; Figure 6 As shown, the purpose of pushing the scraper conveyor 3 at the lower end position is to shorten the distance between the scraper conveyor 3 and the working surface, so as to facilitate the cutting of the machine nest cutting device 1.

[0065] S3, the machine nest cutting device 1 at the lower end position reciprocates to cut the coal to form a machine nest; Figure 7 As shown,

[0066] S4, pulling the drum coal mining machine 2 into the machine nest at the lower end position; Figure 8 As shown, at this time, the drum coal shearer 2 directly moves into the machine nest and can directly cut coal from the lower end position.

[0067] S5, push the scraper conveyor 3, so that the distance between the scraper conveyor 3 and the working surface is equal, and the machine nest cutting device 1 at the upper end 7 position is ready for feeding; Figure 9As shown, at this time, the scraper conveyor 3 extends in a direction perpendicular to the advancing direction of the working face and maintains a straight state, which facilitates the subsequent operation of the machine nest cutting device 1 at the upper end head 7 position in cooperation with the drum coal mining machine 2, without the need to separately adjust the scraper conveyor 3 at the upper end head 7 position.

[0068] S6, pull the hydraulic support 4 to support the roof, the machine nest cutting device 1 and the drum coal shearer 2 at the upper end 7 move toward each other to cut the coal; Figure 10 and Figure 11 As shown, the hydraulic supports 4 are all parallel to the scraper conveyor 3 and arranged in a straight line, which helps to support the roof in time. The machine nest cutting device 1 and the drum coal shearer 2 move towards each other to cut coal, which can shorten the operating path of the drum coal shearer 2 and improve the coal cutting efficiency.

[0069] S7, push the scraper conveyor 3 at the upper end 7 and pull the hydraulic support 4, the machine nest cutting device 1 at the upper end 7 directly feeds the cutting; Figure 12 and Figure 13 As shown,

[0070] S8, the machine nest cutting device 1 at the upper end 7 position reciprocates to cut the coal to form a machine nest; Figure 14 As shown, the nest cutting device 1 uses the cutting drum 13 to cut coal reciprocatingly, making a nest for the drum coal shearer 2 to directly feed. After the nest is formed, the nest cutting device 1 is pulled to the position of the upper end head 7, and the cutting drum 13 of the nest cutting device 1 is placed in the tunnel; during the nest making process, the drum coal shearer 2 is pulled toward the upper end head 7 to cut coal, so that the nest making at the end and the coal cutting in the middle of the working face are parallel operations, thereby improving production efficiency.

[0071] S9, the traction drum coal mining machine 2 enters the machine nest area at the upper end 7 position; Figure 15 As shown,

[0072] S10, push the scraper conveyor 3, so that the distance between the scraper conveyor 3 and the working surface is equal, and the machine nest cutting device 1 at the lower end position is ready for feeding; Figure 16 shown.

[0073] S11, pull the hydraulic support 4 to support the roof, the machine nest cutting device 1 and the drum coal cutter 2 at the lower end position move towards each other to cut coal; Figure 17 and Figure 18 shown.

[0074] S12, push the scraper conveyor 3 at the lower end position and pull the hydraulic support 4, the machine nest cutting device 1 at the lower end position directly feeds the cutting; Figure 19 and Figure 20 shown.

[0075] S13, the machine nest cutting device 1 at the lower end position reciprocates to cut the coal to form a machine nest; Figure 21 shown.

[0076] S14, pulling the drum coal mining machine 2 into the machine nest area at the lower end position; Figure 22 shown.

[0077] S15, push the scraper conveyor 3 so that the distance between the scraper conveyor 3 and the working surface is equal, and the machine nest cutting device 1 at the upper end 7 is ready for feeding;

[0078] S16. Repeat S006-S015 to continuously complete coal cutting at the coal mining face.

[0079] In some embodiments, step S3 further includes pulling the hydraulic support 4 to support the roof, and pulling the machine nest cutting device 1 to a corresponding position so that its cutting drum 13 enters the tunnel beside the working surface.

[0080] Specifically, the machine nest cutting device 1 uses the cutting drum 13 to cut coal reciprocatingly, making a machine nest for the rocker-arm drum coal mining machine 2 to directly cut, and pulling the hydraulic support 4 to provide timely support to the top plate. After the machine nest is made, the machine nest cutting device 1 is towed to the lower end position, and the cutting drum 13 of the cutting device is placed in the tunnel, which facilitates the drum coal mining machine 2 to enter the machine nest at the lower end and directly cut, and also facilitates the next cutting operation of the cutting device.

[0081] Pulling the hydraulic support 4 is a very important safety measure in the coal mining process. As the cutting device 1 in the machine nest cuts coal, the coal seam is cut and the stability of the roof may be affected. By pulling the hydraulic support 4 in time, the roof can be effectively supported to prevent the roof from collapsing, ensuring the safe progress of the coal mining operation. This step needs to be closely coordinated with the coal cutting operation to ensure that the roof is always in a stable support state while cutting coal. The cutting drum 13 is moved into the tunnel to expand the range of the machine nest, reduce the space occupied by the cutting drum 13 in the machine nest, avoid collision and interference between the drum coal mining machine 2 and the cutting drum 13, and cause damage to the equipment, and provide sufficient space for the subsequent entry of the drum coal mining machine 2. Operations in the tunnel require special attention to the moving path and space limitations of the equipment to avoid collisions with other equipment or structures in the tunnel.

[0082] In some embodiments, step S8 also includes pulling the cutting drum 13 of the machine nest cutting device 1 into the tunnel beside the working surface after the cutting is completed at the position of the upper end head 7 of the machine nest cutting device 1.

[0083] Specifically, through repeated reciprocating coal cutting, the nest cutting device 1 gradually expands the cutting range and eventually forms a nest area suitable for the drum coal mining machine 2 to enter. The size and shape of the nest need to meet the design requirements to ensure that the drum coal mining machine 2 can smoothly enter and perform subsequent coal cutting operations. The nest cutting device 1 uses the cutting drum 13 to reciprocate and cut coal, making a nest for the rocker-type drum coal mining machine 2 to directly cut, and pulls the hydraulic support 4 to provide timely support to the top plate. After the nest is made, the nest cutting device 1 is towed to the lower end position, and the cutting drum 13 of the cutting device is placed in the tunnel, so that the drum coal mining machine 2 can enter the nest at the lower end and directly cut, which is also convenient for the cutting device to perform the next cutting operation. The cutting drum 13 is moved into the tunnel to expand the range of the nest, reduce the space occupied by the cutting drum 13 in the nest, avoid collision and interference between the drum coal mining machine 2 and the cutting drum 13, and cause damage to the equipment, and provide sufficient space for the subsequent entry of the drum coal mining machine 2. Operations in the tunnel require special attention to the equipment's movement path and space limitations to avoid collisions with other equipment or structures in the tunnel.

[0084] In some embodiments, the length of the straight section of the scraper conveyor 3 after being pushed in step S2 is L, the length of the drum coal mining machine 2 is L1, and the length of the machine nest cutting device 1 is L2, L>(1.2×L1+L2) to ensure that the rocker arm drum coal mining machine 2 can directly feed, and the length of the curved section of the scraper conveyor 3 in steps S6 and S11 is L3, then the distance the machine nest cutting device 1 cuts the coal is L+L3.

[0085] Specifically, in step S2, the scraper conveyor 3 is pushed to provide space for the cutting operation of the machine nest cutting device 1. The length of the straight section of the scraper conveyor 3 is L. When the conditions are met, it ensures that the rocker-arm drum coal mining machine 2 can directly feed, that is, the drum coal mining machine 2 has sufficient space to carry out coal cutting operations without being interfered with by the scraper conveyor 3. The distance at which the machine nest cutting device 1 cuts coal in steps S6 and S11 takes into account the impact of the curvature of the scraper conveyor 3 on the coal cutting operation, ensuring that the machine nest cutting device 1 can cover the entire working surface and complete the coal cutting task. By properly controlling the length of the scraper conveyor 3, the risk of collision between equipment is reduced, and the possibility of equipment wear and damage is reduced.

[0086] In some embodiments, the diameter of the cutting drum 13 is 1 / 2 to 1 / 3 of the working face mining height, and the cutting drum 13 reciprocates to cut the coal four times. The first three operations of the four operations cut the coal seam, and the fourth operation is for coal loading.

[0087] Specifically, the cutting drum 13 reciprocates to cut the coal four times, and the fourth time is the coal loading operation, in which the crushed coal is transported to the scraper conveyor 3 through the collecting structure on the cutting drum 13, such as the negative pressure pipe, to complete the coal loading.

[0088] As you can understand, the smaller diameter of the cutting drum 13 reduces the equipment's size and weight, facilitating operation within narrow working surfaces and tunnels while also lowering its energy consumption. The appropriate diameter ensures that the cutting drum 13 effectively cuts the coal seam during rotation, while also preventing increased pick wear and unstable equipment operation caused by an excessively large diameter. By repeatedly cutting the coal back and forth, the coal seam is gradually broken down, improving cutting efficiency, reducing the load per cut, and reducing the required diameter of the cutting drum 13. This phased operation reduces the load on the cutting drum 13 per cut, extending the service life of the picks and drum.

[0089] The diameter of the cutting drum 13 should be smaller than the mining height of the drum shearer 2 at the working face. This allows the cutting drum 13 to operate flexibly within the working range of the drum shearer 2 and prevents the cutting drum 13 from being too large, which could interfere with the normal operation of the drum shearer 2. Furthermore, if the cutting drum 13 is too large, it will have difficulty entering the haul roadway 5 and return air roadway 6 on both sides of the working face, preventing access from both sides and impacting cutting efficiency and effectiveness. If the diameter of the cutting drum 13 is too small (less than 1 / 3 of the mining height), it may result in low cutting efficiency, ineffective coal seam cutting, and even damage to the picks or drum due to the reduced contact area between the picks and the coal seam. Furthermore, a too small diameter of the cutting drum 13 increases the number of reciprocating cuts made by the cutting drum 13 at the end 7 or lower end of the working face, affecting the efficiency of the machine nest formation and significantly impacting the original operation of the drum shearer 2. The cutting drum 13 can cover a large coal seam cutting area during rotation while maintaining sufficient cutting depth and strength.

[0090] In some embodiments, the cutting depth of each cutting drum 13 of the machine nest cutting device 1 is equal to the cutting depth of each cutting drum shearer 2.

[0091] Specifically, the cutting depth of the cutting drum 13 is consistent with the cutting depth of the drum coal mining machine 2, ensuring that the machine nest cutting device 1 and the drum coal mining machine 2 can be seamlessly connected during the coal mining process, avoiding coal seam residue or over-cutting caused by inconsistent cutting depths. On the other hand, it can ensure that the shape and size of the machine nest can meet the entry and operation requirements of the drum coal mining machine 2. In the above steps, it is mentioned that the machine nest cutting device 1 and the drum coal mining machine 2 move in opposite directions and operate in parallel. Therefore, the consistent cutting depth ensures that the coal seam is evenly crushed, improves the crushing quality of the coal, reduces the situation of coal blocks being too large or too small, and improves the coal loading efficiency. It reduces the mutual interference between equipment and improves the overall coal mining efficiency. It reduces the load changes of the equipment during the coal mining process, reduces the wear of the cutting teeth and drums, extends the service life of the equipment, reduces the equipment maintenance cost, and facilitates the coordination of the scraper conveyor 3 and the hydraulic support 4.

[0092] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0093] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0094] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0095] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0096] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0097] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Any changes, modifications, substitutions and variations of the above embodiments by those skilled in the art are within the scope of protection of the present invention.

Claims

1. A system for cutting coal with multiple cutting devices in a coordinated manner without oblique cutting, characterized in that: include: A machine nest cutting device, comprising a traction portion, a rotating arm, and a cutting drum, wherein the cutting drum is arranged at a first end of the rotating arm, and a second end of the rotating arm is pivotally connected to the traction portion, the traction portion is used to drive the rotating arm and the cutting drum to move, the cutting drum is used to cut the coal seam, and the rotating arm is used to drive the cutting drum to move relative to the coal seam; A scraper conveyor, the extension direction of the scraper conveyor is perpendicular to the advancement direction of the working face, a machine nest cutting device is arranged at each end of the scraper conveyor, the traction part of the machine nest cutting device moves along the scraper conveyor, a roller coal mining machine is arranged in the middle of the scraper conveyor to cut the coal seam, and a hydraulic support is arranged on the side of the scraper conveyor away from the working face for roof support.

2. The multi-cutting device coordinated coal cutting non-bevel feed system according to claim 1 is characterized in that: The diameter of the cutting drum is smaller than the mining height of the drum shearer at the working face, and the diameter of the cutting drum is larger than 1 / 3 of the mining height of the drum shearer at the working face.

3. The multi-cutting device coordinated coal cutting system without oblique cutting according to claim 2 is characterized in that: The diameter of the cutting drum is 1 / 2 to 1 / 3 of the mining height of the working face.

4. The multi-cutting device coordinated coal cutting non-bevel feed system according to claim 1 is characterized in that: The rotating arm is located on one side of the traction portion adjacent to the end of the scraper conveyor to reduce the space occupied by the lane.

5. A process for cutting coal with multiple cutting devices in a coordinated manner without oblique cutting, characterized in that: The following steps are involved: S1. The two ends of the working surface are respectively at the upper end position and the lower end position, and the two machine nest cutting devices on the scraper conveyor are pulled to the upper end position and the lower end position, and the cutting drums of the two machine nest cutting devices enter the lanes at both ends of the working surface respectively; S2, pushing the scraper conveyor at the lower end position of the working surface, and the machine nest cutting device at the lower end position directly feeds and cuts; S3, the machine nest cutting device at the lower end position reciprocates to cut coal to form a machine nest; S4, pulling the drum coal shearer into the machine nest at the lower end position; S5, pushing the scraper conveyor so that the distance between the scraper conveyor and the working surface is equal, and the cutting device at the upper end position is ready for feeding; S6. Pull the hydraulic support to support the roof, and the cutting device at the upper end and the drum shearer move toward each other to cut coal; S7, pushing the scraper conveyor at the upper end position and pulling the hydraulic support, and the machine nest cutting device at the upper end position directly feeds and cuts; S8, the machine nest cutting device at the upper end position reciprocates to cut coal to form a machine nest; S9, pulling the drum coal shearer into the machine nest area at the upper end position; S10, pushing the scraper conveyor so that the distance between the scraper conveyor and the working surface is equal, and the cutting device at the lower end position is ready for feeding; S11, pulling the hydraulic support to support the roof, and the machine nest cutting device at the lower end position and the drum coal shearer move towards each other to cut coal; S12, pushing the scraper conveyor at the lower end position and pulling the hydraulic support, and the machine nest cutting device at the lower end position directly feeds and cuts; S13, the machine nest cutting device at the lower end position reciprocates to cut coal to form a machine nest; S14, pulling the drum coal shearer into the machine nest area at the lower end position; S15, pushing the scraper conveyor so that the distance between the scraper conveyor and the working surface is equal, and the cutting device at the upper end position is ready for feeding; S16. Repeat S006-S015 to continuously complete coal cutting at the coal mining face.

6. The process for collaborative coal cutting with multiple cutting devices without oblique cutting according to claim 5 is characterized in that: The S3 step also includes pulling the hydraulic support to support the top plate, pulling the machine nest cutting device to a corresponding position so that its cutting drum enters the tunnel beside the working surface.

7. The process for collaboratively cutting coal with multiple cutting devices without oblique cutting according to claim 5 is characterized in that: In the step S8, after the cutting is completed at the upper end position of the machine nest cutting device, the cutting drum of the machine nest cutting device is pulled into the lane beside the working surface.

8. The process for collaboratively cutting coal with multiple cutting devices without oblique cutting according to claim 5 is characterized in that: The length of the straight section of the scraper conveyor after pushing in step S2 is L, the length of the drum coal mining machine is L1, and the length of the machine nest cutting device is L2. L>(1.2×L1+L2) to ensure that the rocker arm drum coal mining machine can directly feed. The length of the curved section of the scraper conveyor in steps S6 and S11 is L3, and the distance the machine nest cutting device cuts the coal is L+L3.

9. The process for collaboratively cutting coal with multiple cutting devices without oblique cutting according to claim 5 is characterized in that: The diameter of the cutting drum is 1 / 2 to 1 / 3 of the mining height of the working face. The cutting drum reciprocates to cut the coal four times. The first three operations of the four operations cut the coal seam, and the fourth operation is for coal loading.

10. The process for collaboratively cutting coal with multiple cutting devices without oblique cutting according to claim 5, characterized in that: The cutting depth of each cutting of the cutting drum of the machine nest cutting device is equal to the cutting depth of each cutting of the drum coal mining machine.

Images