End mining net hanging process for fully mechanized coal mining face of coal mine

Abstract

The invention provides a coal mine fully-mechanized coal mining face end mining net hanging technology, and belongs to the technical field of coal mine fully-mechanized coal mining end mining net hanging. The technology comprises the steps that anchor cables are constructed on a working face, specifically, when a coal mine fully mechanized coal mining working face is stoped to a preset distance, one anchor cable is hit from a fifth first support close to a machine head and a machine tail, one anchor cable is hit every five first supports, and two anchor cables are hit on a second support located in a middle area; two anchor cables perpendicular to the laneway sides are arranged at the positions, aligned with the laneway top plate and the laneway side shoulder nest, of the working machine head and the working machine tail respectively; transporting the flexible net to a working surface; the net hanging steel wire ropes are conveyed to the second supports, the net hanging steel wire ropes are installed on the anchor cables corresponding to the second supports, and each first support is connected with the net hanging steel wire ropes at the anchor cables and one net edge steel wire rope pre-woven on the net edge of the flexible net; the working face net hanging steel wire rope is tensioned, and net hanging is completed; when the working face meshes are unfolded in place, the mesh hanging steel wire ropes are fixed to the steel wire ropes reserved at the two ends, and the flexible mesh is connected with the top reinforcing mesh and the side reinforcing mesh. The process can be simplified, accessories are saved, labor intensity is reduced, and time is shortened.

Description

Technical Field

[0001] The present invention belongs to the technical field of mesh hanging at the end of fully-mechanized mining in coal mines, and in particular relates to a mesh hanging process at the end of fully-mechanized mining working face in coal mines. Background Art

[0002] The traditional process of hanging nets at the end of the traditional fully mechanized mining face in coal mines is still in use today. Although the process is relatively mature, the process is cumbersome, time-consuming and labor-intensive. The traditional process includes laying anchor cables, transporting nets, hanging wire ropes and hanging nets. In the process of laying anchor cables, one anchor rod (anchor cable) is constructed for every bracket, which requires a large number of anchor cables and anchor rods and other consumables, and at least three groups (4 people in each group) are required to complete the anchor rod process, which is time-consuming. In addition, the process of hanging nets and tightening wire ropes in the traditional process are carried out separately. When hanging nets, the wire ropes must be tightened first, and then the personnel climb up to lift and hang the nets. Hanging nets is difficult and dangerous, and the process is cumbersome and troublesome. It often takes 3-4 hours to complete and is labor-intensive. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art and provide a process for hanging mesh at the end of comprehensive mining working face in a coal mine.

[0004] The present invention provides a coal mine fully-mechanized mining face end-of-mining mesh hanging process, the process comprising:

[0005] Construction of anchor cables at the working face: When the coal mine fully mechanized mining face is mined to the preset distance, an anchor cable is installed from the fifth first bracket near the head and tail of the machine and every five first brackets, and two anchor cables are installed at the second bracket in the middle area; two anchor cables are installed perpendicular to the side of ...

[0006] Transport the flexible net to the work surface;

[0007] Transport the net hanging steel wire rope to the second bracket, and install the net hanging steel wire rope on the anchor rope corresponding to the second bracket, and connect each first bracket to the net hanging steel wire rope at the anchor rope and a pre-woven net edge steel wire rope of the flexible net edge;

[0008] Tighten the wire rope for hanging net on the working surface to complete the hanging net;

[0009] When the mesh is unfolded on the working surface, fix the hanging mesh wire rope to the reserved wire ropes at both ends, and connect the flexible mesh to the top and side steel meshes.

[0010] Optionally, each anchor cable uses at least 3 anchors.

[0011] Optionally, transporting the flexible net to the working surface comprises:

[0012] Before the last pulling and moving equipment train on the working face, the flexible net is folded in a special frame and transported to the corner of the auxiliary transport chute connecting lane aligned with the main withdrawal channel;

[0013] After the anchor cable construction is completed on the working face, the flexible net frame is moved out and the corners are smoothed so that the end of the flexible net is aligned with the tail triangle area of ​​the conveyor on the working face;

[0014] Three single pillars are driven at the bend of the coal wall at the tail of the conveyor, with the handles facing the coal wall to form a smooth guide angle from the auxiliary transport chute to the working face;

[0015] Transport the flexible net in the net frame from the auxiliary transport chute to the tail of the scraper, pull the net to the coal machine and loosen it;

[0016] Fold the end of the mesh toward the tail of the machine by a preset distance, and then pull the mesh to the coal machine to stop the machine;

[0017] Fold the mesh back to the preset distance, lift it up with the winch wire rope installed in front of the frame, start the coal mining machine and return it to the bottom of the mesh, so that the folding head is at the right rocker arm, stop the coal mining machine, untie the mesh folding head, and transport the folded mesh to the auxiliary side of the transport chute;

[0018] The flexible net is transported to the working surface, and the flexible net is straightened and the net edge is pulled out.

[0019] Optionally, transporting the net hanging steel wire rope to the second bracket and installing the net hanging steel wire rope on the anchor cable corresponding to the second bracket includes:

[0020] Transport the net hanging steel wire rope to the second bracket, combine the two net hanging steel wire ropes and fix them with rope clamps, and at the same time, fix the tight rope anchor cable again with rope clamps.

[0021] Optionally, the opening of the U-shaped ring faces the coal wall, and a lock is used to fix the U-shaped ring.

[0022] Optionally, the distance between the U-shaped ring and the tail end of the anchor cable is 80-120 mm; and / or,

[0023] The rope clamp spacing is 80-120 mm.

[0024] Optionally, the step of connecting each first bracket to a net hanging steel wire rope at an anchor cable and a pre-woven net edge steel wire rope at a flexible net edge comprises:

[0025] Installing a U-shaped ring on the net hanging wire rope, and installing the U-shaped ring on the anchor cable in front of the first bracket;

[0026] A fixing piece is installed at a corresponding position of each first bracket, and the fixing piece passes through a net hanging steel wire rope at an anchor cable and a net edge steel wire rope pre-woven at a flexible net edge.

[0027] Optionally, the fixing member is a U-shaped ring or a spring hook.

[0028] Optionally, the step of tightening the mesh wire rope on the working surface to complete the mesh hanging includes:

[0029] A pulley is set on each anchor cable set at the head and tail of the machine, and a wire rope is installed. The working face net hanging wire rope is passed around the pulley, the wire rope is connected to the winches in the two lanes, and the winches are started to tighten the wire rope.

[0030] Optionally, rope clips are used to fix the net hanging wire rope to the reserved wire ropes at both ends.

[0031] In addition, a rope clip is set every 40-60mm on the hanging wire rope and the reserved wire ropes at both ends, and there are no less than 4 rope clips on each wire rope;

[0032] Use lead wire to connect the flexible mesh with the top and side steel meshes; the spacing between lead wire bundles is 200*400mm, and the lead wire must be wrapped at least 3 times.

[0033] The present invention provides a process for hanging nets at the end of comprehensive mining working face of coal mine, and the process comprises: constructing anchor cables at the working face: when the comprehensive mining working face of coal mine is mined to a preset distance, an anchor cable is driven from the first bracket close to the machine head and the machine tail and every five first brackets, and two anchor cables are driven at the second bracket located in the middle area; two anchor cables are driven perpendicular to the lane wall at the working machine head and the machine tail facing the lane roof and the lane wall shoulder socket; the flexible net is transported to the working face; the net hanging steel wire rope is transported to the second bracket, and the net hanging steel wire rope is installed on the anchor cable corresponding to the second bracket, and at the same time, each first bracket is respectively connected with the net hanging steel wire rope at the anchor cable and a pre-woven net edge steel wire rope of the flexible net; the working face net hanging steel wire rope is tightened to complete the net hanging; when the mesh sheet of the working face is unfolded in place, the net hanging steel wire rope is fixed to the steel wire rope reserved at both ends, and the flexible net is connected to the top and side steel meshes. This technology can simplify the working procedures, save the materials and accessories for hanging nets at the end of the fully-mechanized mining face, reduce labor intensity, shorten the time from the end of mining to the breakthrough, and create good conditions for safe production in coal mines, which is of great significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a flowchart of the mesh hanging process for the final mining of a fully mechanized mining face in a coal mine according to a specific embodiment of the present disclosure;

[0035] Figure 2 This is a schematic diagram of anchoring cables on a working surface according to a specific embodiment of the present disclosure;

[0036] Figure 3 It is a schematic diagram of locking the steel wire rope in the middle of the end-of-mining net hanging working surface according to a specific embodiment of the present disclosure;

[0037] Figure 4It is a schematic diagram of the wire rope and U-shaped ring passing through the end-of-mining hanging net working face of the specific embodiment of the present disclosure;

[0038] Figure 5 It is a schematic diagram of forward hook threading on the working surface of the net hanging at the end of mining according to a specific embodiment of the present disclosure;

[0039] Figure 6 It is a schematic diagram of the wire rope for pulling the net at the end of harvesting according to a specific embodiment of the present disclosure. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0041] like Figure 1 As shown, the present disclosure provides a coal mine fully-mechanized mining face end-of-mining mesh hanging process S100, which specifically includes the following steps S110-S150:

[0042] S110. Anchor cable construction on the working face: When the coal mine fully mechanized mining working face is mined to the preset distance, an anchor cable is driven from the 5th first support close to the machine head and the tail and every 5 first supports, and 2 anchor cables are driven at the second support located in the middle area; 2 anchor cables are driven perpendicular to the roadway wall at the working machine head and tail facing the roadway roof and the roadway wall shoulder.

[0043] Specifically, refer to Figure 2 When the working face is mined to 11 meters away from the stop mining line, anchor cables are installed at the first support near the head and tail of the machine. The anchor cables are 200mm away from the front beam. Starting from the 5th support, one anchor cable is installed for every 5 supports (with support numbers "0" and "5"), for a total of 34 anchor cables. The anchor cables installed near the head and tail of the machine have a lifting function, also called lifting anchor cables, and are used for lifting equipment.

[0044] It should be understood that anchor cables can also be installed at the supports near the head and tail of the machine when the working face is mined to other distances from the stop mining line, for example, 10 meters, 12 meters, 13 meters, 15 meters, etc., without specific limitation. The number of anchor cables to be installed is also not specifically limited, and can be other numbers.

[0045] Furthermore, two anchor cables are installed at the second bracket at the middle position far from the machine head, for example, the 88# bracket, with a spacing of 500mm as tight rope anchor cables to provide support force. The anchor cables are exposed 300mm and the specifications are Φ17.8×3200mm.

[0046] Of course, it should be understood that in the case of local roof collapse or gangue leakage, Φ17.8×6400mm anchor cables can be used, and the construction position of the anchor cables can be adjusted according to the actual situation on site, requiring the end of the anchor cable to be flush with the end of the top plate.

[0047] Furthermore, it is also necessary to construct two Φ17.8×6400mm anchor cables perpendicular to the side of the tunnel at the head and tail of the working face, aligned with the tunnel roof and the shoulder socket of the side of the tunnel.

[0048] It should be noted that for each anchor cable used in the working face construction, 3 MSCK2335 anchors can be used. Note that when the anchor cable used is 6400mm, 4 MSCK2335 anchors are used. The anchor cable is effectively anchored and the pre-tensioning force of the anchor cable is not less than 100KN. If the pre-tensioning force does not meet the requirements, it needs to be re-injected.

[0049] In this embodiment, by accurately determining the position of the anchor cable on the roof and the two sides and installing the anchor cable at the corresponding position, the anchor cable can penetrate into the relatively stable rock layer deep in the roof, anchoring the shallow unstable roof rock layer with the deep stable rock layer together to form a stable bearing structure, thereby effectively enhancing the overall stability of the roof and preventing the roof from collapsing. In addition, the anchor cable can exert lateral pressure on the coal or rock mass of the two sides, limiting the deformation and spalling of the two sides, especially in high-gas mines or mines with soft coal.

[0050] S120, transport the flexible net to the working surface.

[0051] Specifically, step S120 includes the following specific processes:

[0052] (1) Before the last pulling and moving of the equipment train on the working face, fold the flexible net in a special frame and use a multi-functional forklift to transport the flexible net to the main withdrawal channel and the corner of the auxiliary transport chute. The placement position should not affect normal traffic.

[0053] (2) After the anchor cable construction on the working surface is completed, the flexible net frame is moved out and the corners are smoothed so that the end of the flexible net is aligned with the tail triangle area of ​​the conveyor on the working surface.

[0054] (3) Three single pillars are driven into the bend of the coal wall at the tail of the conveyor, with the handles facing the coal wall to form a smooth guide angle from the auxiliary transport chute to the working face.

[0055] (4) Manually transport one end of the flexible net in the net frame from the auxiliary transport chute to the tail of the scraper, then connect it to the conveyor chain with a 5-ton lifting chain, start the conveyor, pull the net to the coal machine and release it.

[0056] (5) Fold the end of the mesh 15 meters toward the tail of the machine (it should be noted that the 15 meters here equals the length of the coal mining machine body + the width of the tunnel), and start the conveyor again to pull the mesh to the coal mining machine and stop.

[0057] (6) Fold the mesh back to this distance and lift it up using the winch wire rope installed in front of the frame. Start the coal mining machine and return it to the bottom of the mesh so that the folding head is at the right rocker arm. Stop the coal mining machine, untie the folding head of the mesh, and manually transport the folded mesh to the auxiliary side of the transport chute. The mesh transportation is completed.

[0058] (7) After the flexible net is transported to the working face, it is first straightened manually to ensure that the steel wire rope at the edge of the net is close to the coal wall and always facing upwards without any twisting. Use a knife to cut all the thin ropes binding the flexible net, and then pull out the edge of the net.

[0059] S130, transport the net hanging steel wire rope to the second bracket, install the net hanging steel wire rope on the anchor cable corresponding to the second bracket, and connect each first bracket to the net hanging steel wire rope at the anchor cable and a pre-woven net edge steel wire rope at the edge of the flexible net.

[0060] Specifically, the screen hanging process of step S130 includes the following process:

[0061] (1) Transporting the hanging net wire rope: After the flexible net is transported to the place, the hanging net wire rope (Φ18.5, 350 meters / rod, one at the head and tail of the machine) is transported manually. Before transporting the rope, two rolls of wire rope are hoisted in advance at the head and tail of the machine to facilitate rope transportation, and the wire rope is transported to the 88# bracket. After being transported to the place, the two wire ropes are combined and fixed with rope clamps, with a spacing of 100mm between the rope clamps, and the rope anchor is fixed again with rope clamps. In other words, two anchor cables are installed at the middle 88# bracket, and then the two wire ropes are connected with rope clamps at the butt position.

[0062] In this embodiment, the net hanging wire rope can be a steel wire rope, which can be pulled by a winch to lift the net.

[0063] (2) Wire rope: Please combine Figure 3 and Figure 4 , install a U-shaped ring on the hanging wire rope, install the U-shaped ring on the front anchor cable, with the open side facing the coal wall, and fix it with a lock. The U-shaped ring is 100mm away from the tail end of the anchor cable. In other words, the hanging wire rope is fixed to the anchor cable through the U-shaped ring. It should be noted here that there should be enough margin between the two U-shaped rings to facilitate the connection between the hanging wire rope and the edge of the flexible net, and the wire rope should not be twisted.

[0064] It should be noted that the U-shaped ring is an effective connecting component. By installing it on the front anchor cable, the netting wire rope can be firmly connected to ensure that the netting wire rope and the anchor cable form an integral support structure. This connection method can withstand greater tension and pressure, and in the complex coal mine comprehensive mining environment, it can prevent the netting wire rope from falling off the anchor cable, thereby providing reliable support for the roof support.

[0065] (3) Upper fixings: Please combine together Figure 4 A fixing piece is installed at the corresponding position of each first bracket, and the fixing piece needs to pass through two steel wire ropes, namely, the net hanging steel wire rope at the top plate anchor cable and a pre-woven net edge steel wire rope (Φ10 steel wire rope) at the edge of the flexible net. In other words, the net hanging steel wire rope and the net edge steel wire rope on the flexible net are connected through the fixing piece.

[0066] It should be noted that the fixing member can be a U-shaped ring or a spring hook, and the net edge wire rope and the net hanging wire rope are connected through the U-shaped ring or the spring hook.

[0067] (4) Please combine Figure 5 , each first bracket is equipped with a set of winch wire rope. The winch wire rope is passed under the flexible net, and then passed along the side of the coal wall through the net hanging wire rope at the roof. The rope head is fixed to the wire rope at the edge of the flexible net. It should be noted here that enough margin should be left for the winch wire rope to ensure that it does not affect the deployment of the net.

[0068] S140. Tighten the wire rope for hanging the net on the working surface to complete the hanging of the net.

[0069] Specifically, please combine Figure 5 and Figure 6 , the first support guard plate is retracted and close to the top beam, and a 10-ton pulley is installed on the special anchor cable at the head and tail of the machine, and a 3-meter-long Φ18.5 steel wire rope is installed. The working face net hanging wire rope is passed over the 10T pulleys set at the head and tail of the machine, connected to the winches in the two lanes, and the winches are started to tighten the wire rope to complete the work of tightening the wire rope and hanging the net. In other words, by tightening the net hanging wire rope, the flexible net is pulled up and unfolded.

[0070] It should be noted that during the rope pulling process, the explosion-proof vehicle driver must control the speed and slowly tighten the rope. It is strictly forbidden to pull it hard. The personnel along the line stand in the frame to monitor the tension of the wire rope to prevent the wire rope from twisting, blocking or breaking. If there is a problem, stop the traction in time. Prepare enough wire rope clips on the working surface. If the wire rope breaks, use the rope clips to fix the broken ends in time. The overlap length of the wire rope is not less than 1m, and the rope clips are 100mm each.

[0071] S150. Unfold the working surface mesh into place, fix the mesh hanging wire rope to the reserved wire ropes at both ends, and connect the flexible mesh to the top and side steel meshes.

[0072] Specifically, please combine Figure 6 After the working face mesh is deployed in place, the mesh wire rope and the reserved wire ropes at both ends are fixed with rope clips, one rope clip for 50mm, and no less than 4 rope clips on each wire rope. In this way, the rope clips can tightly fix the mesh wire rope and the reserved wire ropes at both ends together to form a stable connection. In the process of fully mechanized mining in coal mines, it will be subject to various vibrations, impacts and tensions. If there is no reliable fixation, the connection between the wire ropes is easy to loosen or even fall off, causing the mesh to lose effective support and protection, causing safety hazards. The rope clips can resist the influence of these external forces through their strong clamping force, ensure the firmness of the wire rope connection, keep the mesh in the correct position at all times, and play its due support and protection role.

[0073] Furthermore, the flexible net is connected to the top and side steel meshes with 14# lead wire, the spacing between the lead wire bundles is 200*400mm, the three-flower arrangement is used, and the lead wire is wound at least 3 times. After the flexible net is connected to the top and side steel meshes with lead wires, the two work together to form a composite support structure. The top and side steel meshes usually have high strength and rigidity and can provide strong support, while the flexible net has good flexibility and ductility and can adapt to the deformation of the roof and coal side. In this way, the combination of the two enables the support system to effectively resist large static and dynamic load pressures, and to a certain extent deform with the deformation of the surrounding rock, thereby better maintaining the stability of the tunnel or working face.

[0074] The process provided by this embodiment can simplify the process. By placing an anchor cable on every five first brackets, it can effectively save the materials and accessories for the net hanging at the end of the fully mechanized working face, reduce costs, and reduce labor intensity, shorten the time from the end of mining to penetration, and create good conditions for safe production in coal mines, which is of great significance. Furthermore, this embodiment uses two-lane winches to simultaneously carry out the two processes of tightening the wire rope and hanging the net, so that it can be completed in one step and about an hour, saving a lot of manpower, and at the same time saving a lot of time for the end of mining penetration, avoiding the risk of high-altitude operations.

[0075] The following will further illustrate the final mining mesh hanging process of coal mine fully mechanized mining working face in conjunction with specific embodiments:

[0076] Example 1

[0077] The final mesh hanging process of the fully mechanized coal mining face in this example includes:

[0078] S1, working face construction anchor cable

[0079] When the working face is mined to 11 meters away from the stop line, anchor cables are installed between the frames. The anchor cables are 200mm away from the front beam. Starting from the 5th frame, one anchor cable (lifting anchor cable) is installed for every 5 frames (frame numbers with "0" and "5"), and a total of 34 anchor cables are installed. Two anchor cables are installed at the 88th support, with a spacing of 500mm (tightening anchor cables). The anchor cable is exposed 300mm, and the anchor cable specification is Φ17.8×3200mm; Φ17.8×6400mm is used in places where the roof falls or the gangue leaks. The construction position of the anchor cable is adjusted according to the actual situation on site, and the end of the anchor cable is required to be flush with the end of the anchor cable where the roof is intact.

[0080] (2) Two Φ17.8×6400mm anchor cables are constructed perpendicular to the side of the roadway at the head and tail of the working face, aligned with the roadway roof and the side of the roadway shoulder.

[0081] (3) Each anchor cable uses 3 MSCK2335 anchors. Only 2 groups of people are needed to complete the anchor cable task.

[0082] S2, Transport Flexible Net

[0083] S3. Hanging the wire rope: During the wire rope installation stage, install a U-shaped ring on the hanging wire rope, and put the U-shaped ring on the anchor cable in front of the frame, that is, install one Ф20 U-shaped ring for one anchor cable, and install a total of 34 Ф20 U-shaped rings.

[0084] S4. Tighten the wire rope and use the two-lane winch to complete the two processes of tightening the wire rope and hanging the net in one go, which can be completed in about 1 hour.

[0085] S5, hang the net

[0086] It should be noted that the process of transporting the flexible net, hanging the wire rope, tightening the wire rope and hanging the net is the same as given above. Please refer to the above records. Please refer to Table 1 for the number of each structure used in this embodiment 1.

[0087] Comparative Example 1

[0088] This example adopts the traditional coal mine fully mechanized mining face end-of-mining hanging net technology. Under the same working conditions, the traditional technology is used to construct an anchor rod (anchor cable) for every bracket. The difference is that the number of anchoring agents, Ф20 U-shaped rings and 10T pulleys used is different, and anchor rods are also used. It takes 3 groups (4 people in each group) of workers to complete the task of anchor rods (anchor cables). Please refer to Table 1 for the number of each structure.

[0089] In addition, when hanging the net, the wire rope needs to be tightened first, and then the personnel need to climb up to perform operations such as lifting and hanging the net, which takes 3-4 hours to complete.

[0090] Table 1 Number of anchor cables and other structures used in each process

[0091] Anchor cable (root) Anchor rod (set) Anchoring agent (root) Ф20 U-shaped ring 10T pulley Comparative Example 1 34 56 214 90 2 Example 1 34 0 102 34 0

[0092] In summary, according to the results of Comparative Example 1 and Example 1, the traditional process constructs an anchor rod (anchor cable) for every 1 bracket. The new process constructs an anchor cable for every 5 brackets. It can be seen that in the same time, the traditional process requires at least 3 groups of personnel (4 people in each group) to complete, and the new process only requires 2 groups of personnel to complete, reducing the labor intensity of the construction of anchor rods and anchor cables. Compared with the traditional process, the new process can save 56 sets of mining anchor rods, more than 100 mining anchors, 56 Ф20 U-shaped rings, and 2 10T pulleys, saving the material accessories for the end-of-mining net hanging in the comprehensive mining working face. In addition, when hanging the net in the traditional process, the wire rope must be tightened first, and the personnel then climb the height to lift the net and hang the net. The process is cumbersome and troublesome, and the net hanging is difficult. It often takes 3-4 hours to complete, and the labor intensity is high. The new net hanging process uses a two-lane winch to complete the two processes of tightening the wire rope and hanging the net in one go, in one step, and can be completed in about 1 hour, saving a lot of manpower, and at the same time saving a lot of time for the end-of-mining connection.

[0093] The present invention proposes a coal mine fully-mechanized mining face end-of-mining mesh hanging process, which has the following beneficial effects compared with the prior art:

[0094] First, the present invention sets an anchor cable at every five brackets, and connects the steel wire rope between two anchor cables and the net to be hung with a U-shaped ring to fix the flexible net, saving the unmined net hanging material accessories of the comprehensive mining working face, while saving working time and reducing work intensity.

[0095] Second, the new process of hanging nets is all completed in the chute with support conditions, which is safe, efficient and fast. It effectively eliminates the safety risks caused by falling and injuring people during the traditional hanging net process, as well as the injuries caused by the coal slabs and the misoperation of the hydraulic support guard plate, and ensures the safety of employees during the hanging net at the end of the comprehensive mining face, avoiding personal injury.

[0096] Third, the new technology carries out the net hanging process and the wire rope tensioning process simultaneously, which can reduce the labor intensity of personnel, shorten the time from the end of mining to breakthrough, reduce the risk of climbing and hanging the net, and create good conditions for safe production in coal mines, which is of great significance.

[0097] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A coal mine fully-mechanized mining face end-of-mining mesh hanging process, characterized in that: The process comprises: Construction of anchor cables at the working face: When the coal mine fully mechanized mining face is mined to the preset distance, an anchor cable is installed from the fifth first bracket near the head and tail of the machine and every five first brackets, and two anchor cables are installed at the second bracket in the middle area; two anchor cables are installed perpendicular to the side of ... Transport the flexible net to the work surface; Transport the net hanging steel wire rope to the second bracket, and install the net hanging steel wire rope on the anchor rope corresponding to the second bracket, and connect each first bracket to the net hanging steel wire rope at the anchor rope and a pre-woven net edge steel wire rope of the flexible net edge; Tighten the wire rope for hanging net on the working surface to complete the hanging net; When the mesh is unfolded on the working surface, fix the hanging mesh wire rope to the reserved wire ropes at both ends, and connect the flexible mesh to the top and side steel meshes.

2. The process for hanging nets at the end of fully mechanized mining face in a coal mine according to claim 1 is characterized in that: Each of the anchor cables uses at least 3 anchoring agents.

3. The process for hanging nets at the end of fully-mechanized mining face in a coal mine according to claim 1 is characterized in that: The method of transporting the flexible net to the working surface comprises: Before the last pulling and moving equipment train on the working face, the flexible net is folded in a special frame and transported to the corner of the auxiliary transport chute connecting lane aligned with the main withdrawal channel; After the anchor cable construction is completed on the working face, the flexible net frame is moved out and the corners are smoothed so that the end of the flexible net is aligned with the tail triangle area of ​​the conveyor on the working face; Three single pillars are driven at the bend of the coal wall at the tail of the conveyor, with the handles facing the coal wall to form a smooth guide angle from the auxiliary transport chute to the working face; Transport the flexible net in the net frame from the auxiliary transport chute to the tail of the scraper, pull the net to the coal machine and loosen it; Fold the end of the mesh toward the tail of the machine by a preset distance, and then pull the mesh to the coal machine to stop the machine; Fold the mesh back to the preset distance, lift it up with the winch wire rope installed in front of the frame, start the coal mining machine and return it to the bottom of the mesh, so that the folding head is at the right rocker arm, stop the coal mining machine, untie the mesh folding head, and transport the folded mesh to the auxiliary side of the transport chute; The flexible net is transported to the working surface, and the flexible net is straightened and the net edge is pulled out.

4. The process for hanging nets at the end of fully-mechanized mining face in a coal mine according to claim 1 is characterized in that: The net hanging steel wire rope is transported to the second bracket, and the net hanging steel wire rope is installed on the anchor cable corresponding to the second bracket, including: Transport the net hanging steel wire rope to the second bracket, combine the two net hanging steel wire ropes and fix them with rope clamps, and at the same time, fix the tight rope anchor cable again with rope clamps.

5. The process for hanging nets at the end of fully mechanized mining face in coal mine according to claim 4 is characterized in that: The opening of the U-shaped ring faces the coal wall, and a lock is used to fix the U-shaped ring.

6. The process for hanging nets at the end of fully mechanized mining face in a coal mine according to claim 4, characterized in that: The distance between the U-shaped ring and the tail end of the anchor cable is 80-120 mm; and / or, The rope clamp spacing is 80-120 mm.

7. The process for hanging nets at the end of fully-mechanized mining face in a coal mine according to claim 1 is characterized in that: The method of connecting each first bracket to the net hanging steel wire rope at the anchor cable and a pre-woven net edge steel wire rope at the edge of the flexible net comprises: Installing a U-shaped ring on the net hanging wire rope, and installing the U-shaped ring on the anchor cable in front of the first bracket; A fixing piece is installed at a corresponding position of each first bracket, and the fixing piece passes through a net hanging steel wire rope at an anchor cable and a net edge steel wire rope pre-woven at a flexible net edge.

8. The process for hanging nets at the end of fully mechanized mining face of coal mine according to claim 7 is characterized in that: The fixing piece is a U-shaped ring or a spring hook.

9. The process for hanging nets at the end of fully mechanized mining face in a coal mine according to claim 1, characterized in that: The process of tightening the wire rope for hanging the net on the working surface to complete the hanging of the net includes: A pulley is set on each anchor cable set at the head and tail of the machine, and a wire rope is installed. The working face net hanging wire rope is passed around the pulley, the wire rope is connected to the winches in the two lanes, and the winches are started to tighten the wire rope.

10. The process for hanging nets at the end of fully mechanized mining face in a coal mine according to claim 1, characterized in that: Use rope clips to fix the netting wire rope and the reserved wire ropes at both ends, and set a rope clip every 40-60mm between the netting wire rope and the reserved wire ropes at both ends, with no less than 4 rope clips on each wire rope; Use lead wire to connect the flexible mesh with the top and side steel meshes; the spacing between lead wire bundles is 200*400mm, and the lead wire must be wrapped at least 3 times.

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