Underground coal mine roadway supporting system

Abstract

The utility model provides a coal mine underground roadway supporting system, which belongs to the technical field of roadway supporting and comprises an anchor net cable assembly, a supporting bracket and a dust falling device, the anchor net cable assembly comprises an anchor net and an anchor rod; the anchor net is arranged between the coal mine underground roadway and the supporting bracket, and the anchor rod connects the supporting bracket and the anchor rope net assembly into a whole through a fixing piece arranged at the exposed end; the supporting bracket adapts to the coal mine underground roadway, the dust falling device is fixedly mounted at the top of the supporting bracket, and the dust falling device comprises a device main body fixedly connected to the bottom side of the top of the supporting bracket, a dust falling mechanism fixedly mounted in the device main body and communicated with an external water pipe, and a position-adjustable water retaining mechanism; through cooperative use of the anchor net cable assembly, the supporting bracket and the dust falling device, dust treatment can be realized while the stability of the leeward side structure of the roadway is guaranteed, the problem of dust leakage when personnel pass through a water curtain is solved, and the safety and environmental protection property of mining are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to roadway support technical field, especially, relate to a coal mine underground roadway support system. BACKGROUND

[0002] In the mining process, safety production is the primary prerequisite, and the support stability of the coal mine underground roadway as the key channel of the mine ventilation system is directly related to the health and safety of the operating personnel and the production efficiency. Although the traditional roadway support mode (such as anchor net spray support or shed support) can provide certain structural support, in the coal mining process, the roof gangue and coal body may still fall, which constitutes a serious safety threat to the operating personnel. In addition, the dust generated during the coal mining operation not only pollutes the working environment, but also harms the human respiratory system, and long-term inhalation can cause pneumoconiosis and other occupational diseases; more seriously, when the dust concentration reaches the explosion limit, an explosion accident may occur, causing serious casualties and property losses.

[0003] At present, the coal mine usually adopts the ways such as spray dust reduction and water curtain interception to inhibit dust diffusion. For example, multiple water curtains are arranged in the coal mining face, tunneling and maintenance roadway, and a one-pipe multi-point water spray system is used to block the dust. However, this traditional dust reduction method has obvious defects: when the staff needs to pass through, the whole water curtain needs to be closed, which causes a large amount of dust (especially fine particles that are difficult to settle) to diffuse with the air flow during the invalidation period of the water curtain, seriously affecting the dust control effect. UTILITARIAN CONTENT

[0004] In view of the above-mentioned defects of the prior art, the purpose of the utility model is to provide a coal mine underground roadway support system, which can ensure the structural stability of the coal mine underground roadway while realizing the dust control, solve the dust leakage problem when the personnel pass through the water curtain, and improve the safety and environmental protection of the mining.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides a coal mine underground roadway support system, which comprises an anchor net cable assembly, a support bracket and a dust reduction device.

[0006] The anchor net cable assembly comprises an anchor net and an anchor rod; the anchor net is arranged between the coal mine underground roadway and the support bracket, the anchor rod is fixedly arranged in the mounting hole of the coal mine underground roadway, and the support bracket and the anchor net cable assembly are connected into a whole through the fixing piece arranged at the exposed end;

[0007] The support bracket is adapted to the coal mine underground roadway and is arranged at intervals along the length direction of the coal mine underground roadway;

[0008] The dust falling device is fixedly installed on the top of the support support, and comprises a device main body, a dust falling mechanism and a water blocking mechanism; the device main body is fixedly connected to the bottom side of the top of the support support; the dust falling mechanism is fixedly installed in the device main body and is communicated with an external water pipe; the water blocking mechanism comprises a rotating support hinged to the device main body, a water blocking plate slidingly connected along the length direction of the rotating support and a driving piece for driving the rotating support to rotate to a working angle.

[0009] Optionally, the anchor rod comprises an anchor cable and a resin anchor rod; the anchor cable is arranged in the installation hole on the top of the underground roadway; the resin anchor rod is arranged in the installation hole on the side of the underground roadway.

[0010] Optionally, the fixing piece comprises a tray and a nut; a through hole is formed in the center of the tray to facilitate the passing of the anchor rod; the anchor rod is sequentially threaded through the support support, the tray and then is threadedly connected with the nut.

[0011] Optionally, the support support is composed of a plurality of channel steels spliced together, and a cross rib is fixedly connected between two adjacent support supports.

[0012] Optionally, the front and rear direction of the device main body is extended to form an installation portion, and the device main body is fixedly connected with the support support through the installation portion.

[0013] Optionally, the dust falling mechanism comprises an output water pipe and an atomizing nozzle;

[0014] The output water pipe is fixedly connected to the inner side of the bottom wall of the device main body along the length direction of the device main body, and one end of the output water pipe penetrates through the end side wall of the device main body and extends to the outside; a water pump is fixedly connected to the end of the output water pipe extending to the outside of the device main body.

[0015] The atomizing nozzle is a plurality of, and the plurality of atomizing nozzles are uniformly distributed along the length direction of the water pipe; a plurality of first through holes are formed in the bottom wall of the device main body, and the first through holes are used in cooperation with the atomizing nozzles.

[0016] Optionally, the rotating support comprises a support shaft, an L-shaped support and a connecting frame; the L-shaped support is two, and the two L-shaped supports are hinged to the side wall of the device main body through the support shaft; the two ends of the connecting frame are fixedly connected with the two L-shaped supports respectively.

[0017] Optionally, the end side walls of the device main body in the left and right directions are provided with second through holes; the second through holes are hinged with winding shafts; the winding shafts are wound with connecting ropes, and the other ends of the connecting ropes penetrate through the side walls of the device main body and are fixedly connected with the rotating support.

[0018] Optionally, one end of the support shaft is coaxially fixedly connected with a first transmission gear; the same side end of the spool and the first transmission gear is coaxially fixedly connected with a second transmission gear; the output end of the driving member is coaxially fixedly connected with a driving gear, and the driving gear is meshed with the first transmission gear and the second transmission gear.

[0019] Optionally, the water baffle is an L-shaped water baffle, and the water baffle comprises a connecting portion and an arc-shaped water blocking portion.

[0020] As described above, the utility model coal mine roadway support system has at least the following beneficial effects:

[0021] 1. The utility model discloses a fixed part is installed to the tail of the anchor rod, and the support support is connected into a whole, and the support support and the anchor net assembly form a combined support structure, the integrity and stability of the support system are improved, the anchor cable is used for the secondary reinforcement of soft rock or broken surrounding rock, and pre-tightening force is simultaneously applied, the deformation of the support support is reduced, roof fall is effectively prevented, the safety and service life of the coal mine roadway are improved, the roadway support strength is enhanced, a dust falling device (such as water curtain) is installed on the support support of the coal mine roadway, dust generated in mining operation is inhibited, dust concentration in the working environment is reduced, professional health hazards and explosion risks are reduced, the water blocking mechanism is additionally arranged in the dust falling device, the combination design of the rotating support, the water baffle and the driving member is adopted, the water curtain can be locally adjusted, and the problem that the traditional water curtain needs to be completely closed to pass through is avoided, the driving member can drive the rotating support to adjust the angle of the water baffle, staff can selectively pass through part of the water curtain, and the dust falling system does not need to be completely closed, the continuity of dust control is ensured, the position of the water baffle along the length direction of the rotating support is adjustable, the passing area can be flexibly adjusted according to actual demands, different working conditions are adapted, operation convenience is improved, the support and the dust falling are integrated, installation space is saved, the support and dust control demands of various mine roadways are suitable, the water blocking mechanism is modularly designed, maintenance and adjustment are facilitated, different roadway sizes and ventilation conditions can be adapted, and the applicability and reliability of the system are improved.

[0022] 2. The utility model discloses a cross rib installed between adjacent support supports can better evenly apply the pre-tightening force of the anchor cable to the soft rock and broken rock mass on the top of the roadway through the anchor net.

[0023] 3. The utility model discloses a winding shaft and connecting rope are set up in the device main part, make the water baffle reset rely on the pulling force of connecting rope and reset, reduce the direct load of driving part, reduce its work wear and tear to prolong the service life of driving part, and the connecting rope keeps the tension state when the water baffle does not work (initial position), avoids driving part to be under continuous stress, improves the stability and reliability of system, the meshing transmission design of driving gear and first transmission gear, second transmission gear ensures that the water baffle moves stably, synchronously, avoids the jam or deviation, improves the accuracy of control, when driving gear rotates counterclockwise, winding shaft releases connecting rope, and the water baffle rotates clockwise to the working position, keeps the water curtain dust falling effect, when driving gear rotates clockwise, winding shaft recycles connecting rope, and the water baffle resets counterclockwise, ensures that the water curtain recovers quickly, reduces dust overflow time, and the combination of winding shaft and connecting rope gear transmission is simple and compact, is suitable for the installation demand of limited space in pit, and the transmission part adopts the meshing gear design, and the operation is stable and reliable, reduces the mechanical failure risk, and reduces the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the sectional view schematic drawing that the utility model anchor net cable assembly and support bracket cooperate.

[0025] Figure 2 It is the plan view schematic drawing that the utility model anchor net cable assembly and support bracket cooperate.

[0026] Figure 3 It is the overall structure schematic drawing that the utility model support bracket and dust falling device cooperate.

[0027] Figure 4 It is the partial schematic drawing that the utility model support bracket and dust falling device cooperate.

[0028] Figure 5 It is the utility model Figure 4 The enlarged schematic drawing of A in the utility model.

[0029] Figure 6 It is the partial schematic drawing of the utility model dust falling device.

[0030] Figure 7 It is the utility model Figure 6 The enlarged schematic drawing of B in the utility model.

[0031] Element number explanation

[0032] 1, underground roadway, 2, anchor net, 3, anchor cable, 4, resin anchor rod, 5, support bracket, 6, tray, 7, device main part, 701, installation part, 8, dust falling mechanism, 801, water pump, 802, atomizing nozzle, 9, water retaining mechanism, 901, rotating support, 902, water baffle, 903, driving part, 904, winding shaft, 905, connecting rope. Detailed Implementation

[0033] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0034] Please see Figures 1 to 7 It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0035] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0036] Please see Figures 1 to 7The utility model provides a kind of coal mine underground roadway supporting system, including anchor net cable subassembly, supporting bracket 5 and dust-settling device;The anchor net cable subassembly includes anchor net 2 and anchor rod;The anchor net 2 is arranged between coal mine underground roadway 1 and supporting bracket 5, the anchor rod is fixedly arranged in the mounting hole opened in coal mine underground roadway 1, and supporting bracket 5 and anchor cable 3 net subassembly are connected into a whole by the fixing member of exposed end;The supporting bracket 5 is adapted to the coal mine underground roadway 1, and is arranged along the length direction of coal mine underground roadway 1 with interval;The dust-settling device is fixedly installed at the top of the supporting bracket 5, and the dust-settling device includes device main body 7, dust-settling mechanism 8 and water retaining mechanism 9;The device main body 7 is fixedly connected at the top bottom side of supporting bracket 5;The dust-settling mechanism 8 is fixedly installed in device main body 7, and the dust-settling mechanism 8 is communicated with external water pipe;The water retaining mechanism 9 includes rotating support 901 hinged on device main body 7, water retaining plate 902 slidingly connected along the length direction of rotating support 901 (herein, water retaining plate 902 can be bound and fixed at different positions of rotating support 901 by adding rope, and also can adjust the position of water retaining plate 902 by adding connecting buckle) and driving member 903 for driving rotating support 901 to rotate to working angle (herein, driving member 903 can be rotary motor, and rotary motor is prior art and will not be described herein);The application connects supporting bracket 5 into a whole by adding fixing member at the tail of anchor rod, and supporting bracket 5 and anchor cable 3 net subassembly form combined support structure, which improves the integrity and stability of supporting system, anchor cable 3 reinforces soft rock or broken surrounding rock again, applies pre-tightening force simultaneously, reduces the deformation amount of supporting bracket 5, effectively prevents roof caving, improves the safety and service life of coal mine underground roadway 1, enhances roadway supporting strength;Dust-settling device (such as water curtain) is added on supporting bracket 5 of coal mine underground roadway 1, which suppresses dust generated in coal mining operation, reduces dust concentration in working environment, reduces occupational health hazards and explosion risk, water retaining mechanism 9 added in dust-settling device adopts the combined design of rotating support 901, water retaining plate 902 and driving member 903, so that water curtain can be adjusted locally, avoiding the problem that traditional water curtain needs to be completely closed to pass through;The position of water retaining plate 902 along the length direction of rotating support 901 can be adjusted, and the passing area can be flexibly adjusted according to actual demand, which adapts to different working conditions, improves operation convenience, supporting and dust-settling integrated design saves installation space, and is suitable for supporting and dust control requirements of various mine underground roadways 1, and water retaining mechanism 9 is modularized design, which is convenient for maintenance and adjustment, can adapt to different roadway sizes and ventilation conditions, and improves the applicability and reliability of system.

[0037] In the embodiment, please refer to Figure 1 And Figure 2The anchor rod comprises an anchor cable 3 and a resin anchor rod 4; the anchor cable 3 is arranged in a mounting hole at the top of the air return roadway 1; the resin anchor rod 4 is arranged in a mounting hole at the side of the underground roadway 1 of the coal mine; the fixing member comprises a tray 6 and a nut; the tray 6 is provided with a through hole in the center for the anchor rod to pass through; the anchor rod is sequentially threaded through the supporting bracket 5 and the tray 6 and is threadedly connected with the nut; the supporting bracket 5 is composed of a plurality of channel steels which are spliced, and a cross rib is fixedly connected between two adjacent supporting brackets 5; the cross rib can better uniformly apply the pre-tightening force of the anchor cable 3 on the supporting bracket 5 to the soft rock and the broken rock at the top of the roadway through the anchor net 2; the supporting bracket 5 and the anchor cable 3 net assembly are connected to form a combined support whole in the underground roadway 1 of the coal mine; the anchor cable 3 in the combined support whole structure performs secondary support on the soft rock or the broken surrounding rock, and the anchor cable 3 generates a certain pre-tightening force on the supporting bracket 5, thereby reducing the deformation of the supporting bracket 5 and ensuring the support strength of the air return roadway 1.

[0038] In the embodiment, referring to Figures 3 to 7 The two side walls of the device body 7 in the front-rear direction are upwardly extended to form mounting portions 701, and the device body 7 is fixedly connected with the supporting bracket 5 through the mounting portions 701 (the mounting portions 701 and the supporting bracket 5 can be fixedly connected through bolts); the dust falling mechanism 8 comprises an output water pipe and atomizing nozzles 802; the output water pipe is fixedly connected inside the bottom wall of the device body 7 along the length direction of the device body 7, and one end of the output water pipe penetrates through the end side wall of the device body 7 and extends to the outside; the water pump 801 is fixedly connected to the outside end of the output water pipe; the atomizing nozzles 802 are a plurality of, and the plurality of atomizing nozzles 802 are uniformly distributed along the length direction of the output water pipe; a plurality of first through holes are formed in the bottom wall of the device body 7, and the first through holes are used in cooperation with the atomizing nozzles 802; the dust falling device is fixedly installed on the top of the supporting bracket 5 through the upward extension of the two side walls of the device body 7 in the front-rear direction to form the mounting portions 701; the external water pipe is connected through the output water pipe, and the water curtain is formed by the pressurized spraying of the atomizing nozzles 802 through the water pump 801, thereby inhibiting the dust generated in the coal mining operation, reducing the dust concentration in the working environment, and reducing the occupational health hazards and explosion risks.

[0039] In the embodiment, referring to Figures 3 to 7The rotating support 901 comprises a support rotating shaft, L-shaped supports and a connecting support. The two L-shaped supports are hingedly connected to the side walls of the device main body 7 through the support rotating shaft. The two ends of the connecting support are fixedly connected to the two L-shaped supports respectively. The two end side walls of the device main body 7 in the left-right direction are provided with second through holes. The second through holes are hingedly connected to winding shafts 904. The winding shafts 904 are wound with connecting ropes 905, and the other ends of the connecting ropes 905 penetrate through the side walls of the device main body 7 and are fixedly connected to the rotating support 901. One end of the support rotating shaft is coaxially fixedly connected to a first transmission gear. The same side end of the winding shaft 904 and the first transmission gear is coaxially fixedly connected to a second transmission gear. The output end of the driving member 903 is coaxially fixedly connected to a driving gear (the driving member 903 can be a rotary motor, which is a prior art and will not be described here). The driving gear is meshed with the first transmission gear and the second transmission gear respectively. The water baffle 902 is an L-shaped water baffle. The water baffle 902 comprises a connecting portion and an arc-shaped water blocking portion (the water blocking portion can also be a flat plate, such as Figure 6As shown, the water blocking part away from the end of the connecting part is provided with a protrusion for limiting the water flow to only left and right directions, the protrusion is not drawn in the way), when the staff needs to pass, open the switch, the output end of the driving part 903 coaxially fixedly connected driving gear counterclockwise rotation, the first transmission gear, the second transmission gear meshed with the driving gear clockwise rotation, the clockwise rotating first transmission gear drives the bobbin 904 to rotate clockwise to release the connecting rope 905, the clockwise rotating support shaft drives the water baffle 902 to rotate clockwise to the working position, the staff passes through part of the water curtain, the output end of the driving part 903 coaxially fixedly connected driving gear clockwise rotation, drive the first transmission gear, the second transmission gear counterclockwise rotation, the counterclockwise rotating first transmission gear drives the bobbin 904 to rotate counterclockwise to tighten the connecting rope 905, the counterclockwise rotating support shaft drives the water baffle 902 to rotate counterclockwise to reset to the initial position, the application is provided with the bobbin 904 and the connecting rope 905 in the device main body 7, so that the water baffle 902 is reset by the tension of the connecting rope 905, the direct load of the driving part 903 is reduced, the working wear is reduced, and the service life of the driving part 903 is prolonged, the water baffle 902 is in the initial position when not working, the connecting rope 905 is kept in tension state, the driving part 903 is avoided to be continuously stressed, and the stability and reliability of the system are improved; the meshing transmission design of the driving gear and the first transmission gear and the second transmission gear ensures that the water baffle 902 moves stably and synchronously, avoids jamming or deviation, and improves the accuracy of control; when the driving gear rotates counterclockwise, the bobbin 904 releases the connecting rope 905, the water baffle 902 rotates clockwise to the working position, and the water curtain dust reduction effect is maintained; when the driving gear rotates clockwise, the bobbin 904 recovers the connecting rope 905, and the water baffle 902 resets counterclockwise to ensure that the water curtain recovers quickly and reduces dust overflow time; the combination of the bobbin 904 and the connecting rope 905 is matched with the gear transmission, the structure is simple and compact, and is suitable for the installation requirement of limited space underground, the transmission part adopts the meshing gear design, the operation is stable and reliable, the mechanical failure risk is reduced, and the maintenance cost is reduced.

[0040] In summary, the utility model overcomes the various shortcomings in the prior art.

[0041] The above examples only illustrate the principles and effects of the utility model, and are not used to limit the utility model. Any person skilled in the art can modify or change the above examples without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.

Claims

1. A coal mine underground roadway support system characterised by: The anchor net cable assembly, the support bracket and the dust falling device are provided. The anchor net cable assembly comprises an anchor net and an anchor rod; the anchor net is arranged between a roadway and the support bracket; the anchor rod is fixedly arranged in a mounting hole formed in a lower wind side of the roadway; the support bracket and the anchor net cable assembly are connected into a whole through a fixing member arranged on an exposed end of the anchor rod. The support bracket is adapted to the roadway and is arranged along a length direction of the roadway. The dust falling device is fixedly arranged on a top of the support bracket; the dust falling device comprises a device main body, a dust falling mechanism and a water blocking mechanism; the device main body is fixedly connected to a bottom side of the top of the support bracket; the dust falling mechanism is fixedly arranged in the device main body and is communicated with an external water pipe; the water blocking mechanism comprises a rotating bracket hinged to the device main body, a water blocking plate slidingly connected along a length direction of the rotating bracket and a driving member for driving the rotating bracket to rotate to a working angle.

2. A coal mine underground roadway support system as claimed in claim 1 wherein: The anchor rod comprises an anchor cable and a resin anchor rod; the anchor cable is arranged in a mounting hole formed in a top of the roadway; the resin anchor rod is arranged in a mounting hole formed in a side of the roadway.

3. The coal mine underground roadway support system of claim 1, wherein: The fixing member comprises a tray and a nut; a through hole is formed in a center of the tray for the anchor rod to pass through; the anchor rod is threadedly connected to the nut after passing through the support bracket and the tray in sequence.

4. The coal mine underground roadway support system of claim 1, wherein: The support bracket is composed of a plurality of channel steels which are spliced and connected; horizontal ribs are fixedly connected between two adjacent support brackets.

5. The coal mine underground roadway support system of claim 1, wherein: Two side walls of the device main body in a front-rear direction are extended upward to form mounting portions; the device main body is fixedly connected to the support bracket through the mounting portions.

6. The coal mine underground roadway support system of claim 1, wherein: The dust falling mechanism comprises an output water pipe and an atomizing nozzle; The output water pipe is fixedly connected to an inner side of a bottom wall of the device main body along a length direction of the device main body; one end of the output water pipe penetrates through an end side wall of the device main body and extends to the outside; a water pump is fixedly connected to an external end of the output water pipe; The atomizing nozzle is a plurality of; the plurality of atomizing nozzles are uniformly distributed along the length direction of the output water pipe; a plurality of first through holes are formed in the bottom wall of the device main body; the first through holes are used in cooperation with the atomizing nozzles.

7. A coal mine underground roadway support system as claimed in claim 1 wherein: The rotating bracket comprises a bracket shaft, two L-shaped brackets and a connecting frame; the two L-shaped brackets are hinged to the side walls of the device main body through the bracket shaft; the two ends of the connecting frame are fixedly connected to the two L-shaped brackets respectively.

8. A coal mine underground roadway support system as claimed in claim 7 wherein: Second through holes are formed in the end side walls of the device main body in a left-right direction; the second through holes are hinged to winding shafts; the winding shafts are wound with connecting ropes; the other ends of the connecting ropes penetrate through the side walls of the device main body and are fixedly connected to the rotating bracket.

9. A coal mine underground roadway support system as claimed in claim 8 wherein: One end of the bracket shaft is coaxially fixedly connected to a first transmission gear; a second transmission gear is coaxially fixedly connected to the same side end of the winding shaft as the first transmission gear; a driving gear is coaxially fixedly connected to an output end of the driving member; the driving gear is engaged with the first transmission gear and the second transmission gear respectively.

10. The coal mine underground roadway support system of claim 1, wherein: The water blocking plate is an L-shaped water blocking plate; the water blocking plate comprises a connecting portion and an arc-shaped water blocking portion.

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