Dustless coal roadway tunneling method

Abstract

The application discloses a dust-free coal roadway tunneling method, comprising the steps of: drilling a borehole in a coal seam to be tunneled; lowering a screen pipe into the borehole; arranging a dust remover and a dust removal air blower at one end of the borehole, the dust remover being connected to the end of the screen pipe, the dust remover and the dust removal air blower being connected, the dust removal air blower being connected to a wind guide tube, and the wind guide tube being connected to a wind curtain dust sealing device; installing the wind curtain dust sealing device at the body of a tunneling machine, so that multiple nozzles of the wind curtain dust sealing device are arranged in the circumference of the body; and tunneling the coal roadway, wherein the dust generated at a tunneling working face is sucked into the dust remover through the screen pipe, the dust removal air blower conveys the gas filtered by the dust remover to the wind guide tube, the wind guide tube conveys the gas to the wind curtain dust sealing device and sprays the gas through the multiple nozzles, the airflow sprayed forms a wind curtain, and the wind curtain isolates the tunneling working face from a driver's operating room. The application solves the problem that the dust removal effect is not ideal when tunneling the coal roadway in the prior art.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coal roadway tunneling dust removal, and particularly relates to a dust-free coal roadway tunneling method. BACKGROUND

[0002] Coal roadway tunneling refers to tunneling a roadway in a coal seam, which is used for coal transportation, ventilation, and personnel passage, etc. A large amount of dust is generated in the process of coal roadway tunneling. The existing dust removal methods mainly include positive pressure or negative pressure ventilation dust removal, and dust removal in the form of spraying, etc. The dust removal effect is not ideal, and there is still a problem of dust affecting the safety and health of workers. SUMMARY

[0003] The present application provides a dust-free coal roadway tunneling method, which solves the problem of unsatisfactory dust removal effect in the prior art.

[0004] In order to achieve the above purpose, the present application provides a dust-free coal roadway tunneling method, which comprises the following steps:

[0005] The position of a to-be-tunneling roadway is arranged, one side of the to-be-tunneling roadway being an already-tunneling roadway;

[0006] A drill hole is drilled in the coal seam of the to-be-tunneling roadway, the drill hole and the extension direction of the to-be-tunneling roadway being arranged in parallel, one end of the drill hole and one end of the already-tunneling roadway being respectively communicated with a corresponding main roadway of a mining area, the other end of the drill hole and the other end of the already-tunneling roadway being communicated through a cut;

[0007] A screen pipe is lowered into the drill hole, the screen pipe supporting the hole wall of the drill hole;

[0008] A dust remover and a dust removal air blower are arranged at one end of the drill hole close to the cut, the air inlet of the dust remover being connected to the end of the screen pipe, the air outlet of the dust remover being connected to the air inlet of the dust removal air blower, the air outlet of the dust removal air blower being connected to the air inlet of a wind funnel, and the air outlet of the wind funnel being connected to the air inlet of a wind curtain dust sealing device after passing through the already-tunneling roadway;

[0009] The wind curtain dust sealing device is installed at the body of a tunneling machine, and a plurality of nozzles of the wind curtain dust sealing device are arranged in the circumferential direction of the body;

[0010] The dust remover and the dust removal air blower are started, coal roadway tunneling is performed by the tunneling machine, dust generated at the tunneling working face is sucked into the dust remover through the screen pipe, the dust removal air blower transports the gas filtered by the dust remover to the wind funnel, the wind funnel transports the gas to the wind curtain dust sealing device and sprays the gas through the plurality of nozzles thereon, the airflow sprayed forms a wind curtain, and the wind curtain isolates the tunneling working face from a driver's operating room.

[0011] In a possible implementation, a booster fan is arranged between the air outlet of the air duct and the air inlet of the air curtain dust sealing device;

[0012] Before the coal roadway is excavated by the excavator, the booster fan is started. On the one hand, the booster fan increases the negative pressure of the screen pipe at one end of the excavation face, that is, improves the dust removal effect. On the other hand, the booster fan increases the pressure of the airflow sprayed by the nozzle of the air curtain dust sealing device, that is, improves the stability of the air curtain.

[0013] In a possible implementation, the flexible section of the air duct is continuously lengthened along with the movement of the excavator when the excavator excavates the roadway to be excavated.

[0014] When the flexible section reaches the maximum length, the detachable end of the flexible section and the butt joint end of the air duct are detached, and then the flexible section is contracted to the shortest state.

[0015] The two ends of the rigid air duct are respectively connected to the detachable end of the flexible section and the butt joint end of the air duct.

[0016] In a possible implementation, the dust passes through the movable screen pipe and a plurality of fixed screen pipes connected in sequence and then enters the dust collector when the excavator excavates the roadway to be excavated.

[0017] The end of the movable screen pipe is a hemispherical filter cover. The filter cover filters large particles generated during excavation, and the dust passes through the filter cover and enters the movable screen pipe.

[0018] The following steps are repeated during the excavation process of the excavator until the excavation of the roadway is completed.

[0019] When the rotating excavator cutter encounters the filter cover, the excavator cutter pushes the movable screen pipe to move into the fixed screen pipe until the end of the filter cover is flush with the end of the fixed screen pipe.

[0020] One of the fixed screen pipes close to the excavator is taken out by the pipe taking device.

[0021] In a possible implementation, when the movable screen pipe moves into the fixed screen pipe, the spring sheet on the outer wall of the movable screen pipe is clamped at the ratchet on the inner wall of the fixed screen pipe, so that the movable screen pipe can only move in the excavation direction.

[0022] In a possible implementation, when one of the fixed screen pipes close to the excavator is taken out by the pipe taking device, the following steps are included:

[0023] The elongated rod of the pipe taking device is extended between the movable screen pipe and the fixed screen pipe, the end of the elongated rod is fixed relative to the next fixed screen pipe, then the fixed screen pipe to be taken out is clamped by a clamping mechanism, after rotating by a certain angle, two adjacent fixed screen pipes are separated, the fixed screen pipe is taken out from the borehole by the clamping mechanism, and then the elongated rod is retracted.

[0024] In a possible implementation, the number of elongated rods of the pipe taking device is two, the two elongated rods are symmetrically arranged on the two sides of the movable screen pipe, after the elongated rods are extended to positions, the two elongated rods are moved away from each other, the clamping blocks at the ends of the elongated rods are clamped in the grooves in the inner walls of the fixed screen pipes, and then the relative fixation of the elongated rods and the fixed screen pipes is completed.

[0025] In a possible implementation, before the coal roadway is excavated by the tunneling machine, the spraying device is started, a plurality of atomizing nozzles and a plurality of nozzles of the spraying device are staggered arranged, and the outlets of the atomizing nozzles are arranged to be inclined to the tunneling face relative to the nozzles.

[0026] The water mist sprayed by the atomizing nozzles adsorbs the dust in front of the air curtain, and the dust falls to the ground under the action of gravity.

[0027] The one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0028] The dust-free coal roadway excavation method provided in the embodiments of the present application can form negative pressure ventilation at the tunneling face by using the screen pipe, the dust collector and the dust removal fan, and can extract the dust generated at the tunneling face by using the borehole arranged in the roadway to be excavated, so that the dust removal purpose is achieved. Compared with the pressure-in type ventilation technology, the dust removal method can greatly reduce the dust concentration at the tunneling face. The air extracted by the dust removal fan is introduced into the air curtain dust sealing device through the air guide cylinder, the air curtain dust sealing device can form an air curtain by using the introduced air, the air curtain separates the tunneling face from the driver's operating room, so as to further separate the dust at the tunneling face from the driver, so that the dust in the working environment of the driver meets the safety standard, thereby ensuring the safety and health of the workers. The present application ingeniously uses the air discharged by the dust removal fan for the air curtain dust sealing device, so that the air discharged by the dust removal fan does not need to be discharged through a special channel, and therefore the resources of the mine are fully utilized. The method is reasonable in design, high in practicability, and convenient to use and popularize. The method solves the problem that the dust removal effect is not ideal during the coal roadway excavation in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0030] Figure 1 The plane schematic diagram of the dust-free coal roadway tunneling method provided by the embodiment of the present application is shown.

[0031] Figure 2 The state schematic diagram of the tunneling machine during tunneling is provided by the embodiment of the present application.

[0032] Figure 3 The structure schematic diagram of the air guide cylinder provided by the embodiment of the present application is shown.

[0033] Figure 4 The structure schematic diagram of the screen pipe provided by the embodiment of the present application is shown.

[0034] Figure 5 The state schematic diagram of the fixed screen pipe is taken out provided by the embodiment of the present application.

[0035] The drawings are as follows: 1-waiting tunneling roadway; 2-tunneling roadway; 3-drilling hole; 4-mining area main roadway; 5-cut; 6-dust remover; 7-dust removal fan; 8-air guide cylinder; 81-flexible section; 82-rigid air cylinder; 9-air curtain dust sealing device; 10-nozzle; 11-tunneling machine; 12-pressurized fan; 13-fixed screen pipe; 14-movable screen pipe; 15-filter cover; 16-spring sheet; 17-ratchet; 18-elongated rod; 19-clamping mechanism; 20-clamping block; 21-groove; 22-spraying device; 23-atomizing nozzle; 24-water mist; 25-air curtain; 26-return air channel. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0037] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, the terms "mounting", "connecting", "connecting" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0038] As shown in Figures 1 to 4 The dust-free coal roadway tunneling method provided by the embodiments of the present application comprises the following steps:

[0039] The position of the roadway to be excavated 1 is arranged, and one side of the roadway to be excavated 1 is an excavated roadway 2.

[0040] A drill hole 3 is drilled in the coal seam of the roadway to be excavated 1, and the drill hole 3 and the extension direction of the roadway to be excavated 1 are arranged in parallel. One end of the drill hole 3 and one end of the excavated roadway 2 are respectively communicated with the corresponding main roadway 4 of the mining area, and the other end of the drill hole 3 and the other end of the excavated roadway 2 are communicated through a cut 5.

[0041] A screen pipe is lowered into the drill hole 3, and the screen pipe supports the hole wall of the drill hole 3.

[0042] A dust remover 6 and a dust removal air blower 7 are arranged at one end of the drill hole 3 close to the cut 5, the air inlet of the dust remover 6 is connected to the end of the screen pipe, the air outlet of the dust remover 6 and the air inlet of the dust removal air blower 7 are connected, the air outlet of the dust removal air blower 7 is connected to the air inlet of a wind guide 8, and the air outlet of the wind guide 8 is connected to the air inlet of a wind curtain dust sealing device 9 after passing through the excavated roadway 2.

[0043] The wind curtain dust sealing device 9 is installed on the body of a tunneling machine 11, and the plurality of nozzles 10 of the wind curtain dust sealing device 9 are arranged in the circumference of the body.

[0044] The dust remover 6 and the dust extraction fan 7 are started, the coal roadway is excavated through the heading machine 11, the dust generated in the excavation working face is sucked into the dust remover 6 through the screen pipe, the dust extraction fan 7 transports the gas filtered by the dust remover 6 to the air duct 8, the air duct 8 transports the gas to the air curtain dust sealing device 9 and sprays out through the plurality of nozzles 10, the sprayed air flow forms the air curtain 25, and the air curtain 25 isolates the excavation working face and the driver operating room.

[0045] It should be noted that the roadway to be excavated 1 in the embodiment is a transportation crossheading, and the excavated roadway 2 is an auxiliary transportation crossheading. That is, before the excavation of the transportation crossheading, the auxiliary transportation crossheading, the cut 5 and the mining district roadway 4 have been arranged, and the excavation of the auxiliary transportation crossheading, the cut 5 and the mining district roadway 4 adopts the existing dust removal and ventilation technology.

[0046] The screen pipe, the dust remover 6 and the dust extraction fan 7 can form a negative pressure ventilation in the excavation working face, the dust generated in the excavation working face can be extracted through the drill hole 3 arranged in the roadway to be excavated 1, so that the dust removal purpose is achieved. The dust removal method adopted by the present application can greatly reduce the dust concentration in the excavation working face compared with the pressure ventilation technology. The air extracted by the dust extraction fan 7 is introduced into the air curtain dust sealing device 9 through the air duct 8, the air curtain dust sealing device 9 can form the air curtain 25 by using the introduced air, the air curtain 25 isolates the excavation working face and the driver operating room, so as to further isolate the dust in the excavation working face and the driver, so that the dust in the working environment of the driver meets the safety standard, thereby ensuring the safety and health of the workers. The present application ingeniously uses the air discharged by the dust extraction fan 7 for the air curtain dust sealing device 9, and further does not need to set a special channel to discharge the air of the dust extraction fan 7, so that the mine resources are fully utilized. The method is reasonable in arrangement, high in practicability and convenient to use and popularize.

[0047] For the roadway to be excavated 1 with a longer length, if the dust removal effect is limited when the method of the present application is used, one or more than one dust extraction fan 7 can be added at the part of the air duct 8 located in the excavated roadway 2.

[0048] The mining district roadway 4 in the diagram of the present application is a simple diagram, and the specific arrangement is determined according to the actual situation, as long as the arrangement requirement of the mine roadway is met.

[0049] The other roadway of the working face, that is, the air return crossheading 26 in the embodiment can also be excavated by using the method of the present application.

[0050] In the embodiment, a booster fan 12 is arranged between the air outlet of the air duct 8 and the air inlet of the air curtain dust sealing device 9.

[0051] Before the coal roadway is excavated by the heading machine 11, the booster fan 12 is started, on the one hand, the booster fan 12 increases the negative pressure of the screen pipe at one end of the heading face, that is, the dust removal effect is improved, on the other hand, the booster fan 12 increases the pressure of the airflow sprayed by the nozzle 10 of the air curtain dust sealing device 9, that is, the stability of the air curtain 25 is improved.

[0052] It should be noted that generally, only the dust removal fan 7 is arranged to realize the arrangement of the air curtain 25, and the stability of the air curtain 25 is not stable. Therefore, the booster fan 12 is added in the present application, on the one hand, the stability of the air curtain 25 is ensured, so that the air curtain 25 can well isolate the heading face and the driver's operating room, and on the other hand, the negative pressure in the dust suction process of the heading face is increased, so that the dust removal efficiency is improved, and the safety of the working environment of the driver is further ensured. The equipment has high utilization rate, reasonable layout and strong practicability.

[0053] As shown in Figure 3 In the embodiment, the flexible section 81 of the air duct 8 is continuously lengthened with the movement of the heading machine 11 when the heading machine 11 excavates the to-be-excavated roadway 1.

[0054] When the flexible section 81 reaches the maximum length, the detachable end of the flexible section 81 and the butt joint end of the air duct 8 are detached, and then the flexible section 81 is contracted to the shortest state.

[0055] The two ends of the rigid air duct 82 are connected to the detachable end of the flexible section 81 and the butt joint end of the air duct 8, respectively.

[0056] It should be noted that when the heading machine 11 excavates the to-be-excavated roadway 1, the air duct 8 needs to be continuously lengthened to meet the ventilation demand. By arranging the flexible section 81 and continuously increasing the number of the rigid air duct 82, the air guiding function of the air duct 8 can be ensured, thereby meeting the dust removal demand of the present application.

[0057] As shown in Figure 4 In the embodiment, when the heading machine 11 excavates the to-be-excavated roadway 1, the dust enters the dust collector 6 in turn through the movable screen pipe 14 and the plurality of fixed screen pipes 13 connected in turn.

[0058] The end of the movable screen pipe 14 is a hemispherical filter cover 15, which filters large particles generated during excavation, and the dust enters the movable screen pipe 14 through the filter cover 15.

[0059] The following steps are repeated during the excavation process of the heading machine 11 until the excavation of the roadway is completed.

[0060] After the rotating heading machine 11 cutter encounters the filter cover 15, the heading machine 11 cutter pushes the movable screen pipe 14 to move into the fixed screen pipe 13 until the end of the filter cover 15 is flush with the end of the fixed screen pipe 13.

[0061] The fixed screen pipe 13 close to the heading machine 11 is taken out by the pipe taking device.

[0062] It should be noted that the hemispherical filter cover 15 is not easy to be scraped and damaged by the cutter of the heading machine 11. After the cutter of the heading machine 11 hits the filter cover 15, the cutter of the heading machine 11 can push the movable screen pipe 14 to move, so as to ensure the normal ventilation function in the heading process. The filter cover 15 also has a filtering function to prevent large coal blocks or sundries from entering the screen pipe. The fixed screen pipe 13 close to the heading machine 11 is taken out during the heading process of the heading machine 11, so as to ensure the stability of the borehole 3 and avoid the influence of the screen pipe on the normal heading of the heading machine 11.

[0063] In the embodiment, when the movable screen pipe 14 moves towards the fixed screen pipe 13, the spring sheet 16 on the outer wall of the movable screen pipe 14 is clamped at the ratchet 17 on the inner wall of the fixed screen pipe 13, so that the movable screen pipe 14 can only move in the heading direction.

[0064] It should be noted that by setting the matched spring sheet 16 and ratchet 17, it can be ensured that the movable screen pipe 14 can only move in the heading direction, so as to prevent the movable screen pipe 14 from falling to the heading working face.

[0065] As shown in Figure 5 In the embodiment, the process of taking out the fixed screen pipe 13 close to the heading machine 11 by the pipe taking device includes the following steps:

[0066] The elongated rod 18 of the pipe taking device is inserted between the movable screen pipe 14 and the fixed screen pipe 13, the end of the elongated rod 18 is fixed relative to the next fixed screen pipe 13, then the fixed screen pipe 13 to be taken out is clamped by the clamping mechanism 19, after rotating a certain angle, the two adjacent fixed screen pipes 13 are separated, then the fixed screen pipe 13 is taken out from the borehole 3 by the clamping mechanism 19, and then the elongated rod 18 is retracted.

[0067] It should be noted that the two adjacent fixed screen pipes 13 are temporarily fixed by sleeving and clamping at the ends, and can be separated after relative rotation of the two adjacent fixed screen pipes 13. Therefore, after the fixed screen pipe 13 deep in the borehole 3 is fixed by the elongated rod 18, the fixed screen pipe 13 at the borehole 3 opening can be disassembled by the clamping mechanism 19. The structure of the clamping mechanism 19 which can clamp the end of the fixed screen pipe 13 and has a rotating function can be used, which is not limited here.

[0068] In the embodiment, the number of the elongated rods 18 of the pipe taking device is two, the two elongated rods 18 are symmetrically arranged on the two sides of the movable screen pipe 14, after the elongated rods 18 are extended to the position, the two elongated rods 18 are away from each other, the clamping blocks 20 at the ends of the elongated rods 18 are clamped in the groove bodies 21 of the inner wall of the fixed screen pipe 13, and then the relative fixation of the elongated rods 18 and the fixed screen pipe 13 is completed.

[0069] It should be noted that the ends of the elongated rods 18 are connected to the control mechanism, the control mechanism can control the transverse movement of the elongated rods 18, and can also control the two elongated rods 18 to be away from or close to each other, the control mechanism meeting the above functions can be applied to the present application, and the specific structure thereof will not be described in detail in the embodiment.

[0070] As shown in Figure 2 In the embodiment, the spraying device 22 is started before the coal roadway tunneling by the tunneling machine 11, the plurality of atomizing nozzles 23 and the plurality of nozzles 10 of the spraying device 22 are staggered, and the outlets of the atomizing nozzles 23 are inclined to the tunneling working face relative to the nozzles 10.

[0071] The water mist 24 sprayed by the atomizing nozzles 23 adsorbs the dust in front of the air curtain 25, and the dust falls to the ground under the action of gravity.

[0072] It should be noted that the plurality of atomizing nozzles 23 and the plurality of nozzles 10 of the spraying device 22 are staggered, so that the dust in front of the air curtain 25 can be more evenly treated. The water mist 24 sprayed by the atomizing nozzles 23 adsorbs the dust in front of the air curtain 25, further preventing the dust from entering the working environment of the driver after passing through the air curtain 25.

[0073] In the embodiment, it is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. A dustless coal roadway tunneling method, characterized by, The method comprises the following steps: arranging the position of a roadway to be excavated (1), one side of the roadway to be excavated (1) being an excavated roadway (2); drilling a borehole (3) in the coal seam of the roadway to be excavated (1), the borehole (3) and the extension direction of the roadway to be excavated (1) being arranged in parallel, one end of the borehole (3) and one end of the excavated roadway (2) respectively communicating with a corresponding main roadway (4) of a mining area, the other end of the borehole (3) and the other end of the excavated roadway (2) communicating through a cut (5); lowering a screen pipe into the borehole (3), the screen pipe supporting the borehole wall of the borehole (3); arranging a dust remover (6) and a dust removal fan (7) at one end of the borehole (3) close to the cut (5), the air inlet of the dust remover (6) being connected to the end of the screen pipe, the air outlet of the dust remover (6) and the air inlet of the dust removal fan (7) being connected, the air outlet of the dust removal fan (7) being connected to the air inlet of a wind guide tube (8), the air outlet of the wind guide tube (8) being connected to the air inlet of a wind curtain dust sealing device (9) after passing through the excavated roadway (2); arranging the wind curtain dust sealing device (9) on the body of a roadheader (11) and arranging a plurality of nozzles (10) of the wind curtain dust sealing device (9) in the circumferential direction of the body; starting the dust remover (6) and the dust removal fan (7), excavating the coal roadway by the roadheader (11), the dust generated at the excavation face being sucked into the dust remover (6) through the screen pipe, the dust removal fan (7) conveying the gas filtered by the dust remover (6) to the wind guide tube (8), the wind guide tube (8) conveying the gas to the wind curtain dust sealing device (9) and spraying the gas through the plurality of nozzles (10) thereon, the airflow sprayed out forming a wind curtain (25), the wind curtain (25) isolating the excavation face and a driver's operating room; when the roadheader (11) excavates the roadway to be excavated (1), the dust enters the dust remover (6) after passing through the movable screen pipe (14) and a plurality of fixed screen pipes (13) connected in sequence; the end of the movable screen pipe (14) being a hemispherical filter cover (15), the filter cover (15) filtering large particles generated during excavation, the dust entering the movable screen pipe (14) through the filter cover (15); repeating the following steps during the excavation process of the roadheader (11) until the excavation of the roadway is completed; after the rotating roadheader (11) cutter encounters the filter cover (15), the roadheader (11) cutter pushes the movable screen pipe (14) to move into the fixed screen pipe (13) until the end of the filter cover (15) is flush with the end of the fixed screen pipe (13); removing one of the fixed screen pipes (13) close to the roadheader (11) by a pipe removing device; When the movable screen pipe (14) moves into the fixed screen pipe (13), the spring leaf (16) on the outer wall of the movable screen pipe (14) is clamped at the ratchet (17) on the inner wall of the fixed screen pipe (13), so that the movable screen pipe (14) can only move in the tunneling direction; When one of the fixed screen pipes (13) near the tunneling machine (11) is taken out by the pipe taking device, the following steps are included: The elongated rod (18) of the pipe taking device is inserted between the movable screen pipe (14) and the fixed screen pipe (13), the end of the elongated rod (18) is fixed relative to the next fixed screen pipe (13), then the fixed screen pipe (13) to be taken out is clamped by the clamping mechanism (19), after rotating by a certain angle, the two adjacent fixed screen pipes (13) are separated, the fixed screen pipe (13) is taken out from the drill hole (3) by the clamping mechanism (19), and then the elongated rod (18) is retracted; The number of the elongated rods (18) of the pipe taking device is two, the two elongated rods (18) are symmetrically arranged on the two sides of the movable screen pipe (14), after the elongated rods (18) are inserted into position, the two elongated rods (18) are away from each other, the clamping block (20) at the end of the elongated rod (18) is clamped in the groove (21) on the inner wall of the fixed screen pipe (13), and then the relative fixing of the elongated rod (18) and the fixed screen pipe (13) is completed; Before the coal roadway tunneling is performed by the tunneling machine (11), the spraying device (22) is started, a plurality of atomizing nozzles (23) of the spraying device (22) and a plurality of the nozzles (10) are arranged alternately, and the outlet of the atomizing nozzle (23) is arranged to be inclined to the tunneling face relative to the nozzle (10); The water mist (24) sprayed by the atomizing nozzle (23) adsorbs the dust in front of the air curtain (25), and the dust falls to the ground under the action of gravity.

2. The dustless coal tunneling method according to claim 1, characterized in that: A booster fan (12) is arranged between the air outlet of the air guide cylinder (8) and the air inlet of the air curtain dust sealing device (9); Before the coal roadway tunneling is performed by the tunneling machine (11), the booster fan (12) is started, on the one hand, the booster fan (12) increases the negative pressure of the end of the screen pipe located on the tunneling face, that is, improves the dust removal effect, and on the other hand, the booster fan (12) increases the pressure of the airflow sprayed by the nozzle (10) of the air curtain dust sealing device (9), that is, improves the stability of the air curtain (25).

3. The dust-free coal tunneling method according to claim 1, characterized in that: When the tunneling machine (11) tunnels the roadway (1) to be tunneled, the flexible section (81) of the air guide cylinder (8) is continuously lengthened with the movement of the tunneling machine (11); When the flexible section (81) reaches the maximum length, the detachable end of the flexible section (81) and the butt joint end of the air guide cylinder (8) are detached, and then the flexible section (81) is contracted to the shortest state; The two ends of the rigid air cylinder (82) are connected to the detachable end of the flexible section (81) and the butt joint end of the air guide cylinder (8) respectively.

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