Dust removal method for non-explosive excavation face of tunnel

Abstract

The invention relates to a tunnel non-explosion excavation face dust removal method which comprises the steps that an air supply pipe is arranged on the side upper portion of a working trolley so as to convey air supply flow; a dust removal fan is arranged below the side of the working trolley to form a suction area; the positions of the air supply pipe and the dust removal fan are adjusted to be arranged on the cross section of the tunnel in a diagonal mode, so that an oblique directional wind field is formed by air supply airflow and the suction area, and dust-containing air is guided to flow along the path of the directional wind field and is collected by the dust removal fan. The invention provides a dust removal method for a non-explosive excavation face of a tunnel. Forward air pressure is formed on the rear side of a working trolley; meanwhile, a directional wind field with guidance and synergy can be formed in the space between the working trolley and the non-explosive excavation face of the tunnel, and the dust collecting efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tunnel engineering, and particularly relates to a tunnel non-explosive excavation face dust removal method. BACKGROUND

[0002] In the tunnel excavation construction process, a large amount of dust is often generated when the construction equipment such as the working trolley is working on the tunnel non-explosive excavation face. In particular, in the non-explosive excavation mode, due to the strong continuity of the operation, the high dust concentration, and the closed operation environment, dust diffusion problems are easily caused, which seriously reduces the air quality of the construction site, endangers the health of the operating personnel, and may also cause equipment pollution, accumulation of combustible dust, and other safety hazards. The existing working trolley is provided with a telescopic device, an excavation rod, and an excavation drill bit at the front end. Through the telescopic movement of the telescopic device, the excavation rod and the excavation drill bit are driven to reciprocate, which is used for continuous excavation of the tunnel non-explosive excavation face.

[0003] At present, the commonly used dust removal methods include setting a dust suction port on the tunnel non-explosive excavation face to suck dust air through an air extractor, or arranging an air supply pipe in a local area to push the dust to flow to the suction area through air flow disturbance. However, these methods have obvious defects: on the one hand, relying on negative pressure air suction, due to the limited arrangement of the air suction port, it is difficult to effectively control the dust with a wide diffusion range, and blind areas of dust removal are easily caused; on the other hand, the air supply and suction systems are independent of each other, the wind field action is discontinuous, and a guiding air flow path cannot be formed in the entire operation area, so the dust often flows and stays randomly in the tunnel space, resulting in poor dust removal effect. SUMMARY

[0004] To solve the technical problem of low dust removal efficiency of the tunnel non-explosive excavation face in the prior art, the present application provides a tunnel non-explosive excavation face dust removal method, which forms a forward air pressure at the rear side of the working trolley to prevent dust-containing air from diffusing to the rear side of the working trolley; at the same time, a directional wind field with guidance and synergy can be formed in the space between the working trolley and the tunnel non-explosive excavation face, so as to efficiently control the dust diffusion path and improve the dust collection efficiency.

[0005] The present application provides a tunnel non-explosive excavation face dust removal method, which comprises the following steps:

[0006] An air supply pipe is arranged above the side of the working trolley to transport the air supply flow;

[0007] A dust removal fan is arranged below the side of the working trolley to form a suction area;

[0008] The positions of the air supply pipe and the dust removal fan are arranged diagonally on the tunnel cross section, so that the air supply flow and the suction area form an oblique directional wind field, guiding the dust-containing air to flow along the directional wind field path and be collected by the dust removal fan.

[0009] Further, the air supply pipe is arranged from the rear of the working platform and blows air to the non-explosive excavation face of the tunnel.

[0010] Further, the air supply pipe arranged above the side of the working platform to deliver the air flow further comprises the following steps:

[0011] A part of the air of the air supply pipe is blown in parallel to the non-explosive excavation face of the tunnel, so that the air flow and the suction area form an oblique directional wind field; another part of the air of the air supply pipe is obliquely blown downward to the working platform to form a first wind screen at the rear side of the working platform.

[0012] Further, the dust removal method for the non-explosive excavation face of the tunnel further comprises the following steps:

[0013] According to the working parameters of the dust removal fan, the air flow delivered by the air supply pipe to the non-explosive excavation face of the tunnel is adjusted.

[0014] Further, the dust removal method for the non-explosive excavation face of the tunnel further comprises the following steps:

[0015] The blowing direction of the radiator on the working platform is adjusted to form a second wind screen at the front side of the working platform to inhibit the back diffusion of the dust-containing air at the front side of the working platform.

[0016] Further, the dust removal method for the non-explosive excavation face of the tunnel further comprises the following steps:

[0017] An auxiliary blowing mechanism is arranged above the front side of the working platform to form an auxiliary air flow, which is consistent with the path of the oblique directional wind field formed by the air flow and the suction area.

[0018] Further, the dust removal method for the non-explosive excavation face of the tunnel further comprises the following steps:

[0019] The dust-containing air is sprayed by the spraying device.

[0020] Further, the dust removal method for the non-explosive excavation face of the tunnel further comprises the following steps:

[0021] The dust removal fan is connected with the dust removal pipeline, a gradually expanding conical suction port is arranged at the dust suction position of the dust removal pipeline, and the suction port is aimed at the oblique directional wind field to realize the guidance and collection of the dust-containing air.

[0022] Further, the dust removal method for the non-explosive excavation face of the tunnel further comprises the following steps:

[0023] A plurality of layers of spaced-apart air holes are arranged around the side wall of the conical suction port, and a plurality of lateral negative pressure guide air flows are formed through the air holes to guide the dust-containing air into the suction area.

[0024] Further, the dust removal method for the non-explosive excavation face of the tunnel further comprises the following steps:

[0025] A physical partition is arranged on the front side of the working platform, so that the physical partition, the tunnel non-blasting excavation surface, the tunnel wall and the working platform jointly form a relatively closed dust collection area, the diffusion of dust-containing air flow is limited through the dust collection area, and the dust-containing air is guided into the inclined directional wind field.

[0026] In this embodiment, a tunnel non-blasting excavation surface dust removal method is given for dust removal in tunnel construction.

[0027] First, an air supply pipe is arranged above the side of the working platform, air flow is transported to the direction of the tunnel non-blasting excavation surface, the air flow diffuses along the tunnel and forms a forward air pressure, which can block the diffusion of dust-containing air to the rear of the working platform, and under the action of the air pressure, the dust-containing air is pushed to the suction area below one side of the tunnel. At the same time, the dust removal fan arranged below the side of the working platform continuously works to form the suction area, and the concentrated dust-containing air is sucked in, so as to realize directional collection and discharge. Through the synergistic effect of air supply and negative pressure suction, an inclined directional wind field can be formed on the cross section of the tunnel, so that the dust generated in the non-blasting excavation process moves along the predetermined path and is collected, and the retention and diffusion of the dust in the construction area are reduced. In addition, during the tunnel construction, the lengthened air supply pipe is moved synchronously as the working platform advances, and the suction area is moved synchronously, and the steps S1-S3 are repeated, so that the tunnel non-blasting excavation surface dust removal is continuously carried out until the construction of the tunneling section is completed. The tunnel non-blasting excavation surface dust removal method provided by the present application forms a forward air pressure at the rear side of the working platform to prevent the diffusion of dust-containing air to the rear side of the working platform; at the same time, a directional wind field with guidance and synergy can be formed in the space between the working platform and the tunnel non-blasting excavation surface, so as to efficiently control the diffusion path of the dust and improve the dust collection efficiency. Moreover, compared with the existing method of relying on a large number of air supply or air suction devices for full-face dust removal, the air flow utilization efficiency of the present method is high, and the structure arrangement is reasonable. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following briefly introduces the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from the drawings shown without creative labor. The same components in the drawings are denoted by the same reference numerals. The drawings are not drawn according to the actual proportion.

[0029] Figure 1 The step schematic diagram of one embodiment of the tunnel non-blasting excavation surface dust removal method of the present application;

[0030] Figure 2The device layout schematic diagram of one embodiment of the tunnel non-explosive excavation face dust removal method of the present application;

[0031] Figure 3 The tunnel section layout schematic diagram of another embodiment of the tunnel non-explosive excavation face dust removal method of the present application;

[0032] Figure 4 The device layout schematic diagram of another embodiment of the tunnel non-explosive excavation face dust removal method of the present application;

[0033] Figure 5 The schematic diagram of the dust removal fan, the dust removal pipeline and the dust suction port in one embodiment of the tunnel non-explosive excavation face dust removal method of the present application. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be a middle element.

[0036] It should also be noted that if the embodiments of the present application involve directional indications, such as up, down, left, right, front, back, etc., the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly. In addition, if the embodiments of the present application involve descriptions such as "first, second", "S1, S2", "step one, step two" and the like, such descriptions are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or the number of the indicated technical features or indicating the execution order of the method, etc. Those skilled in the art can understand that any change within the technical concept of the present application without deviating from the technical points of the present application should be included in the protection scope of the present application.

[0037] The present application provides a tunnel non-explosive excavation face dust removal method, referring to Figures 1-4 characterized in that it comprises the following steps:

[0038] S1: A supply air pipe 1 is arranged above the side of a working trolley 2 to deliver a supply air flow;

[0039] S2: A dust removal fan 3 is arranged below the side of the trolley 2 to form a suction area;

[0040] S3: The positions of the air supply pipe 1 and the dust removal fan 3 are arranged diagonally on the cross section of the tunnel 100, so that the air supply flow and the suction area form an oblique directional wind field, guiding the dust-containing air to flow along the path of the directional wind field and be collected by the dust removal fan 3.

[0041] In this embodiment, a tunnel non-blasting excavation surface dust removal method is given for dust removal in tunnel construction.

[0042] First, an air supply pipe is arranged above the side of the trolley to transport air flow to the direction of the tunnel non-blasting excavation surface, the air flow diffuses forward along the tunnel and forms a forward air pressure, which can block the diffusion of dust-containing air to the rear of the trolley, and under the action of the air pressure, push the dust-containing air to the suction area below one side of the tunnel. At the same time, the dust removal fan arranged below the side of the trolley works continuously to form a suction area, which sucks the concentrated dust-containing air, thereby realizing directional collection and discharge. Through the synergistic effect of air supply and negative pressure suction, an oblique directional wind field can be formed on the cross section of the tunnel, so that the dust generated in the non-blasting excavation process moves quickly along the given path and is collected, reducing the residence and diffusion of dust in the construction area. In addition, during tunnel construction, as the trolley advances, the lengthened air supply pipe is moved synchronously, and the suction area is moved synchronously, and the steps of S1-S3 are repeated, so that the tunnel non-blasting excavation surface dust removal is continuously carried out until the construction of the tunneling section is completed. The tunnel non-blasting excavation surface dust removal method provided by the present application forms a forward air pressure at the rear side of the trolley to prevent the diffusion of dust-containing air to the rear side of the trolley; at the same time, a directional wind field with guidance and synergy can be formed in the space between the trolley and the tunnel non-blasting excavation surface, thereby efficiently controlling the dust diffusion path and improving the dust collection efficiency. Moreover, compared with the existing method of relying on a large number of air supply or exhaust devices for full-face dust removal, the present method has high air flow utilization efficiency and reasonable structure arrangement.

[0043] Preferably, referring to Figure 2 , the air supply pipe 1 is led out from the rear of the trolley 2 and blows towards the tunnel non-blasting excavation surface 200.

[0044] In this embodiment, the air supply pipe is led out from the rear of the trolley and blows towards the tunnel non-blasting excavation surface, so that the air supply flow maintains a continuous and smooth flow state when passing above the trolley, forming a stable and uniform first wind screen between the construction area and the workers. The wind screen can effectively block the backflow of dust and direct the dust to the suction area for efficient collection.

[0045] Preferably, referring to Figure 4 , the air supply pipe 1 is arranged above the side of the trolley 2 to transport air flow, further comprising the following steps:

[0046] A part of the air of the air supply pipe 1 is blown in parallel to the tunnel non-explosive excavation face 200, so that the air flow and the suction area form a diagonal directional wind field;

[0047] Another part of the air of the air supply pipe is blown obliquely downward to the working trolley to form a first wind screen at the rear side of the working trolley.

[0048] In this embodiment, a part of the air of the air supply pipe is blown in parallel to the tunnel non-explosive excavation face to form a forward air pressure at the rear side of the working trolley, effectively block the dust backflow, and cooperate with the suction area to form a diagonal directional wind field to guide the dust-containing air to flow along the designated path and be collected. At the same time, another part of the air of the air supply pipe is blown obliquely downward to the working trolley to form a first wind screen at the rear side of the working trolley, and in combination with the forward air pressure at the rear side of the working trolley, an additional air flow support layer is formed below the first wind screen, enhancing the stability and sealing of the first wind screen, and reducing turbulence phenomenon.

[0049] For example, the air supply pipe 1 includes a main branch pipe 11 and a branch pipe 12, the main branch pipe 11 is parallel to the direction of the tunnel 100, and is arranged diagonally with the suction area in the cross section of the tunnel 100, for parallel conveying air to the tunnel non-explosive excavation face 200, so that the air flow and the suction area form a diagonal directional wind field;

[0050] The branch pipe 12 is arranged obliquely downward and towards the central area of the tunnel non-explosive excavation face 200, to form a first wind screen at the rear side of the working trolley 2.

[0051] In this embodiment, the air supply pipe is divided into a main branch pipe and a branch pipe, a part of the air of the air supply pipe is blown in parallel to the tunnel non-explosive excavation face through the main branch pipe, and another part of the air of the air supply pipe is blown obliquely downward to the working trolley to form a first wind screen at the rear side of the working trolley.

[0052] Preferably, the tunnel non-explosive excavation face dust removal method further comprises the following steps:

[0053] According to the working parameters of the dust removal fan, the air flow of the air supply pipe conveyed to the tunnel non-explosive excavation face is adjusted.

[0054] In this embodiment, the air flow rate of the air supply pipe to the non-blasting excavation surface of the tunnel is adjusted according to the suction capacity of the dust removal fan, so that the air supply amount is matched with the suction capacity, and the dust is prevented from being disturbed and escaping outside due to excessive air supply amount, or the dust is prevented from being difficult to enter the suction area due to insufficient air supply amount. For example, the working parameters of the dust removal fan include the air speed at the dust removal fan, the air supply cross-sectional area, and the like. According to the air speed and the air supply cross-sectional area of the dust removal fan, the air supply amount of the air supply pipe is adjusted, so that the air supply capacity of the air supply pipe is matched with the dust suction capacity of the dust removal fan.

[0055] For example, referring to Figure 4 , the air supply pipe 1 further comprises a controller, and the air supply member, the first speed meter 13, and the adjusting valve arranged in the main branch pipe 11 and / or the branch pipe 12; the second speed meter is arranged at the dust removal fan 3; the controller is connected with the air supply member, the speed meter 13, and the adjusting valve, and is used for receiving the air speed data detected by the first speed meter 13 and the second speed meter, and controlling the working states of the air supply member and the adjusting valve according to the air speed data and the air supply cross-sectional area of the dust removal fan, so as to adjust the air supply amount and the air speed. Specifically, since the air supply cross-sectional area of the dust removal fan can be measured in advance, according to the air speed data measured by the first speed meter and the second speed meter, the method for adjusting the air flow rate of the air supply pipe can be that, in the case that the opening of the adjusting valve is certain, the rotating speed of the air supply member (for example, the fan) is controlled by the controller to achieve the adjustment; or in the case that the rotating speed of the air supply member is certain, the size of the opening of the adjusting valve is adjusted to achieve the adjustment; or the adjusting valve and the air supply member are cooperatively controlled, or other effective methods. Optionally, the controller is a programmable logic controller (PLC) or other component with a control function.

[0056] For example, referring to Figure 4 , the dust removal method for the non-blasting excavation surface of the tunnel further comprises the following steps:

[0057] The blowing direction of the radiator 4 on the working trolley 2 is adjusted, and a second air screen is formed on the front side of the working trolley 2, so as to inhibit the dust-containing air on the front side of the working trolley 2 from diffusing backward.

[0058] In this embodiment, the blowing direction of the radiator on the working trolley is adjusted, and a second air screen is formed on the front side of the working trolley. The second air screen on the front side of the working trolley cooperates with the first air screen on the rear side of the working trolley to form a bidirectional blocking structure on the front and rear sides of the working trolley. The dust-containing air needs to pass through two air flow barriers to enter the working area, so that the dust blocking efficiency is significantly improved. At the same time, the blowing air flow of the cooling radiator is used to construct the second air screen, so that the front-end blocking of the dust can be achieved without increasing additional air supply equipment, and the dual effects of energy saving and environmental protection are achieved.

[0059] For example, referring to Figure 4 , the dust removal method for the non-blasting excavation surface of the tunnel further comprises the following steps:

[0060] An auxiliary air blower mechanism 5 is arranged on the front side of the working trolley 2 to form an auxiliary air flow, which is consistent with the oblique directional air flow path formed by the air supply flow and the suction area.

[0061] In this embodiment, an auxiliary air blower mechanism is added on the front side of the working trolley to form an auxiliary air flow, which is consistent with the direction of the directional air flow, to achieve multi-point superposition and multi-source reinforcement of the directional air flow, and to expand the spatial distribution range of the oblique directional air flow. Especially in complex construction environments, the main and branch air flows may be disturbed by local blockage, reflection, etc., and the addition of the auxiliary air flow can compensate and stabilize the structure of the oblique air flow.

[0062] Preferably, the tunnel non-explosive excavation face dust removal method further comprises the following steps: spraying the dust-containing air through a spraying device.

[0063] In this embodiment, the dust particles in the air are fully contacted, agglomerated and weighted by spraying the dust-containing air through the spraying device, which accelerates the particle settling, thereby significantly reducing the concentration of suspended dust in the air. The humid air flow formed by spraying can also further suppress dust in the air flow, reducing the possibility of secondary dust raising.

[0064] Specifically, referring to Figure 4 , the spraying device is arranged on the tunnel non-explosive excavation face 200 excavation area, or / and the directional air flow path formed between the air supply flow and the suction area; the spraying device sprays the dust-containing air.

[0065] In this embodiment, the spraying device is arranged on the tunnel non-explosive excavation face 200 excavation area, or / and the directional air flow path formed between the air supply flow and the suction area; the spraying device sprays the dust-containing air.

[0066] More specifically, the spraying device includes a first water spraying device, which is arranged on the working trolley excavation area. The first water spraying device sprays water in the working trolley excavation area to settle the dust-containing air.

[0067] More specifically, the front end of the working platform is provided with a telescopic device, a tunneling rod and a tunneling drill bit, the first water spraying device, the air extractor, the dust falling box and the dust collection bag are arranged on the tunneling rod; the first water spraying device and the air extractor are arranged in the dust falling box; one side of the dust falling box is communicated with the dust suction pipe, and the inlet of the dust suction pipe faces the tunneling position of the tunneling drill bit; the other side of the dust falling box is communicated with the dust collection bag, and is used for collecting dust-containing air that is not sprayed and dusted.

[0068] More specifically, the first water spraying device comprises: a plurality of first booster pipes arranged at intervals, and a plurality of first atomizing nozzles arranged on each first booster pipe; the generated smoke dust is sprayed and dusted through the first booster pipe and the first atomizing nozzle.

[0069] More specifically, referring to Figure 4 , the spraying device further comprises: a second water spraying device 9 arranged on the path of the directional air field formed between the air supply flow and the suction area; the second water spraying device 9 comprises: a second booster pipe 91 and a second atomizing nozzle arranged on the second booster pipe; the spraying water mist can accurately cover the motion track of the dust-containing air flow, the spraying and dust removal cooperates with the directional air field, significantly enhances the condensation and sedimentation efficiency of the dust particles, and effectively inhibits the secondary dispersion of the dust.

[0070] More specifically, in use, referring to Figure 4 , the tunneling drill bit of the working platform is started, and the tunneling drill bit is used to tunnel along the non-explosive tunneling face 200; the air extractor arranged in the dust falling box is started, the dust suction pipe reciprocally moves under the driving of the tunneling rod and the telescopic device to suck the dust dispersed on the front side of the working platform into the dust falling box, the first water spraying device is started, the first booster pipe and the first atomizing nozzle are used for spraying operation, the dust in the dust falling box is sprayed and dusted by the first water spraying device into the dust falling box, and the dust that is not dusted is collected in the dust collection bag; the second water spraying device 9 is started, the second booster pipe 91 and the second atomizing nozzle are used for spraying, dust falling and dust removal on the path of the directional air field; the dust removal air extractor 3 is started, and the dust-containing air flowing along the path of the directional air field that is not wetted and dusted is guided and collected.

[0071] More preferably, referring to Figure 1 and Figure 5 , the tunnel non-explosive tunneling face dust removal method further comprises the following steps: connecting the dust removal air extractor 3 with the dust removal pipeline 6, arranging a tapered dust suction port 7 with a gradually expanding shape at the dust suction position of the dust removal pipeline 6, and aiming the dust suction port 7 at the oblique directional air field to effectively guide and collect the dust-containing air.

[0072] In this embodiment, the dust removal fan is connected with the dust removal pipeline, and a tapered dust suction port with a gradually expanding structure is arranged at the dust suction position of the dust removal pipeline, so that the suction range is expanded while the suction force is ensured, and the collection efficiency of the dust-containing air is improved. By directing the dust suction port towards the oblique directional wind field formed by the air supply airflow and the suction area, the dust-containing air is effectively guided along the path of the wind field to the position of the dust suction port, thereby reducing the diffusion of the dust-containing air and improving the directivity and overall efficiency of dust removal. This method not only strengthens the centralized transportation effect of dust, but also avoids the backflow or escape of dust caused by air disturbance.

[0073] Preferably, referring to Figure 5 , the tunnel non-explosive excavation surface dust removal method further comprises the following steps:

[0074] A plurality of air holes 71 are arranged on the side wall of the dust suction port 7 in multiple layers and at intervals, and a plurality of lateral negative pressure guide airflows are formed through the air holes 71 to guide the dust-containing air into the suction area.

[0075] In this embodiment, a plurality of air holes are arranged on the side wall of the dust suction port in multiple layers and at intervals, and a plurality of lateral negative pressure guide airflows are formed around the dust suction port. Through these lateral negative pressure airflows, an expanded suction area can be established around the dust suction port, effectively enhancing the guiding ability of the surrounding dust-containing air, so that the dust airflow that is not directly sucked in can also be drawn into the dust removal pipeline by the lateral airflow, further reducing the residual dust-containing air.

[0076] Preferably, referring to Figure 4 , the tunnel non-explosive excavation surface dust removal method further comprises the following steps:

[0077] A physical partition 8 is further arranged on the front side of the working trolley, and the physical partition 8, the tunnel non-explosive excavation surface 200, the tunnel wall, and the working trolley 2 jointly form a relatively closed dust collection area, which limits the diffusion of the dust-containing airflow and guides the dust-containing air into the oblique directional wind field.

[0078] In this embodiment, a physical partition is arranged on the front side of the working trolley, and the physical partition, the tunnel non-explosive excavation surface, the tunnel wall, and the working trolley jointly form a relatively closed dust collection area, which limits the diffusion of the dust-containing airflow and guides the dust-containing air into the oblique directional wind field, effectively limiting the disordered diffusion of the dust-containing airflow. Considering the specific tunnel construction situation, the physical partition cannot be completely closed, which easily leads to the escape of dust-containing air. This method combines the air screen formed by the air supply airflow, and through the synergistic effect of the air screen and the physical partition, the guidance and restraint of the dust-containing air are further strengthened. The air screen supplements the deficiency of the physical partition in the form of an airflow barrier, guides the dust-containing air to smoothly enter the oblique directional wind field, and ensures that the dust is effectively collected. This combined method not only ensures smooth airflow, but also significantly improves the dust removal efficiency

[0079] The above embodiments only express several implementation manners of the present application, which are described in a more specific and detailed manner, but cannot be understood as a limitation on the scope of the patent. It should be noted that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application.

Claims

1. A method for dust removal from a tunnel non-explosive excavation face, characterized in that, The method comprises the following steps: a blowing pipe is arranged above the side of the trolley to deliver a blowing air flow; a dust-removing fan is arranged below the side of the trolley to form a suction area; the positions of the blowing pipe and the dust-removing fan are adjusted to be diagonally arranged on the cross section of the tunnel, so that the blowing air flow and the suction area form an oblique directional wind field, and the dust-containing air is guided to flow along the path of the directional wind field and is collected by the dust-removing fan.

2. The tunnel non-explosive excavation face dust removal method according to claim 1, characterized in that, The blowing pipe is led out from the rear of the trolley and blows to the non-blasting excavation face of the tunnel.

3. The tunnel non-explosive excavation face dust removal method according to claim 2, characterized in that, The step of arranging the blowing pipe above the side of the trolley to deliver the blowing air flow further comprises the following steps: a part of the air of the blowing pipe is blown in parallel to the non-blasting excavation face of the tunnel, so that the blowing air flow and the suction area form an oblique directional wind field; and another part of the air of the blowing pipe is obliquely blown downward to the trolley to form a first wind screen at the rear side of the trolley.

4. The tunnel non-explosive excavation face dust removal method according to claim 1, characterized in that, The method further comprises the following steps: According to the working parameters of the dust-removing fan, the air flow delivered by the blowing pipe to the non-blasting excavation face of the tunnel is adjusted.

5. The tunnel non-explosive excavation face dust removal method according to claim 1, characterized in that, The method further comprises the following steps: The blowing direction of the radiator on the trolley is adjusted to form a second wind screen at the front side of the trolley, so as to inhibit the backward diffusion of the dust-containing air at the front side of the trolley.

6. The tunnel non-explosive excavation face dust removal method according to claim 1, characterized in that, The method further comprises the following steps: An auxiliary blowing mechanism is arranged above the front side of the trolley to form an auxiliary air flow, which is consistent with the path of the oblique directional wind field formed by the blowing air flow and the suction area.

7. The tunnel non-explosive excavation face dust removal method according to claim 1, characterized in that, The method further comprises the following steps: The dust-containing air is sprayed by a spraying device.

8. The tunnel non-explosive excavation face dust removal method according to claim 1, characterized in that, The dust-removing fan is connected with a dust-removal pipeline, and a tapered dust suction port is arranged at the dust suction position of the dust-removal pipeline, the dust suction port is aimed at the oblique directional wind field to realize the guidance and collection of the dust-containing air. The method further comprises the following steps:

9. The tunnel non-explosive excavation face dust removal method according to claim 8, characterized in that, A plurality of layers of air holes are arranged on the side wall of the tapered dust suction port in a spaced manner, and a plurality of lateral negative pressure guide air flows are formed through the air holes to guide the dust-containing air into the suction area. The method further comprises the following steps:

10. The tunnel non-explosive excavation face dust removal method according to claim 1, characterized in that, A physical partition is arranged at the front side of the trolley, and the physical partition, the non-blasting excavation face of the tunnel, the surrounding wall of the tunnel and the trolley jointly form a relatively closed dust collection area, the diffusion of the dust-containing air flow is limited through the dust collection area, and the dust-containing air is guided into the oblique directional wind field. ​

Images