CN113482699A - Large-mining-height fully-mechanized coal mining face section dust control and removal method and device - Google Patents
Large-mining-height fully-mechanized coal mining face section dust control and removal method and device Download PDFInfo
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- CN113482699A CN113482699A CN202110838323.8A CN202110838323A CN113482699A CN 113482699 A CN113482699 A CN 113482699A CN 202110838323 A CN202110838323 A CN 202110838323A CN 113482699 A CN113482699 A CN 113482699A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
- E21F5/04—Spraying barriers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/20—Drawing-off or depositing dust
Abstract
The invention belongs to the technical field of coal mine dust control. The device comprises a dust control spraying device and an automatic control device, wherein the dust control spraying device is arranged at the downwind side of the coal mining machine, high-pressure water mist is sprayed obliquely to the coal wall along the wind flow direction, and dust-containing air flow at the downwind side of the coal mining machine is controlled at the coal side; the dust control spraying device comprises a dust control spraying body and a nozzle; one side of the spray body facing the coal wall is provided with a spray opening, and the nozzle is arranged in the spray opening and sprays outwards through the spray opening; the spray nozzle is inclined towards the coal wall side at a set angle. According to the invention, by utilizing the entrainment effect formed by the high-pressure water curtain which is inclined to the coal wall along the wind, the dust-containing air flow at the downwind side of the coal mining machine is controlled at the coal side, and the high-pressure spray forms negative pressure dust suction at the upwind side surface of the dust control spraying device, so that secondary dust guiding and controlling is realized, the dust control effect is high, and the dust removal efficiency is high.
Description
Technical Field
The invention belongs to the technical field of coal mine dust control, and relates to a method and a device for controlling dust removal of a large-mining-height fully-mechanized coal mining face section.
Background
The coal cutting and dust production of the coal mining machine and the caving of the coal wall caving of the fully mechanized mining face with large mining height are the most main dust sources of the fully mechanized mining face. Under the drive of wind current, dust generated by coal cutting and caving is rapidly diffused along the coal side of a working face, the dust is mainly diffused along the coal side within 10 meters from the leeward side of a coal mining machine, the dust is diffused to a support upright column by about 10-15 meters from the leeward side, and then the dust begins to diffuse towards the pedestrian side, so that the visibility of the working face is reduced, the normal operation of an operator is affected, the safety production of a mine and the physical and mental health of the operator are seriously threatened, a dust control method and a corresponding device are urgently needed to be adopted at the leeward side of the coal mining machine, and the problem that the dust is diffused towards the pedestrian side from the leeward side of the coal mining machine is solved.
At present, most of coal cutting and dust production of a coal cutter are treated by adopting an external spraying mode arranged on the machine surface of the coal cutter, but in the actual field application process, the external spraying range is difficult to reach the roller of the coal cutter, especially the external spraying at the roller on the windward side of the coal cutter belongs to upwind spraying, the dust fall effect is limited, an onboard dust removal fan of the coal cutter belongs to a preliminary research and development stage, and no good solution is provided for solving the problem of dust diffusion of a fully mechanized mining face with large mining height.
Disclosure of Invention
In view of the above, the invention aims to solve the problem of poor effect of the existing dust removal mode, and provides a method and a device for controlling dust removal of a large-mining-height fully mechanized coal mining face section.
In order to achieve the purpose, the invention provides the following technical scheme:
a dust control spraying device is arranged on the leeward side of a coal mining machine, high-pressure water mist is sprayed on the coal wall obliquely along the wind flow direction, and dust-containing air flow on the leeward side of the coal mining machine is controlled on the coal side.
According to the basic scheme, high-pressure water mist is sprayed by adopting the downwind inclined coal wall to form a high-pressure spraying water curtain inclined to the coal wall, and according to the jet flow theory and the wall attachment effect of hydrodynamics, dust-containing airflow around the high-pressure water curtain is guided to the coal side to play a role in controlling dust and reduce the probability of dust diffusion to the pedestrian side; the high-pressure spraying is used for covering the cross section of the working surface, so that the dust in the dust-containing airflow can be effectively reduced, and the aim of dust removal is fulfilled.
Further, an injection port is arranged on the dust control spraying device, and the dust-containing air flow is sucked into the injection port by utilizing the negative pressure generated during the spraying of the high-pressure water mist and is sprayed out along with the high-pressure water mist; and the negative pressure formed behind the high-pressure spray is utilized to carry out secondary negative pressure injection on the dust-containing airflow diffused to the vicinity of the stand column of the bracket, so that the secondary dust removal effect is achieved.
Furthermore, a dust isolating net is arranged on a hydraulic support of the working face to control dust to diffuse outwards.
Further, the spraying parameters of the dust control spraying device are as follows: spraying pressure: 4-10 MPa, water consumption: 15-20L/min, injecting negative pressure: 300-1000 Pa, injection air volume: 20 to 30m3/min。
A section dust control and removal device for a fully mechanized mining face with a large mining height comprises a dust control and removal spraying device and an automatic control device, wherein the dust control and removal spraying device is arranged on the downwind side of a coal mining machine, is connected with the automatic control device and is controlled by the automatic control device; the dust control spraying device comprises a dust control spraying body and a nozzle; a spray nozzle is arranged on one side of the spray body, which is far away from the coal mining machine, the nozzle is arranged in the spray nozzle and sprays outwards through the spray nozzle; the spray nozzle is inclined towards the coal wall side at a set angle.
Further, the upwind side of spraying body is equipped with the mouth that draws that is used for inhaling the dust, draw the mouth and communicate with each other with the nozzle, the negative pressure that the high-pressure water smoke that the nozzle sprays produced makes the dust inhale through drawing the mouth to spout through nozzle and water smoke one-way, promote the dust fall effect.
Further, a high-pressure water pipe for conveying spray water is also arranged in the spray body, and the nozzle is connected with the high-pressure water pipe; the automatic control device comprises a control box, an electromagnetic valve and a sensor for acquiring a position signal of the coal mining machine, wherein the electromagnetic valve is arranged on the high-pressure water pipe, and the electromagnetic valve and the sensor are both connected with the control box.
And the coal mining device further comprises a dust-proof net, wherein the dust-proof net is arranged on a hydraulic support of the coal mining working face.
The invention has the beneficial effects that:
1) the invention mainly utilizes the entrainment effect formed by the downwind inclined coal wall high-pressure water curtain to control the dust-containing airflow at the downwind side of the coal mining machine at the coal side, and simultaneously, high-pressure spray forms negative pressure dust suction on the upwind side surface of the dust control and removal spraying device, thereby achieving the control and treatment of the dust-containing airflow at the downwind side of the coal mining machine.
2) The dust control device adopts an automatic control mode, carries out dust control according to the operation condition of the coal mining machine, effectively controls and traps dust generated by coal cutting and caving impact of the coal mining machine, controls the dust produced by the coal mining machine on the side of a coal wall, reduces the amount of the dust diffused into a bracket, prevents the dust from being further diffused, reduces the harm of the dust to operators and has obvious dust control and reduction effect.
3) The dust control and removal device formed by combining the dust separation net and the automatic control spraying device is simple to install and convenient to use, solves the problem that dust produced by a coal mining machine diffuses to the pedestrian side, achieves the dust separation rate of more than 50%, and obviously improves the operating environment.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is an overall schematic view of a section dust control and removal device of a large-mining-height fully mechanized coal mining face in the invention;
FIG. 2 is a top view of the cross-section dust control and removal device of the fully mechanized mining face with large mining height in the invention;
FIG. 3 is a schematic structural diagram of the dust control spray body of the present invention.
Reference numerals: 1-a coal mining machine; 2-a sensor; 3-an automatic control device; 4-hydraulic support; 5-dust control spraying device; 6-dust separation net; 51-dust control spraying body; 52-an injection port; 53-spray nozzle.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 1 to 3, the cross section dust control and removal device for the fully mechanized mining face with large mining height comprises a dust control and removal spraying device 5 and an automatic control device 3, wherein the dust control and removal spraying device 5 is installed on a protective net of a hydraulic support 4 of the fully mechanized mining face with large mining height, is positioned on the downwind side of a coal mining machine 1, is connected with the automatic control device 3, and is controlled by the automatic control device 3; the dust control spraying device 5 comprises a dust control spraying body 51 and a nozzle; a spray nozzle 53 is arranged on one side of the spray body, which is far away from the coal mining machine 1, and the nozzle is arranged in the spray nozzle 53 and sprays outwards through the spray nozzle 53; the spray opening 53 is inclined toward the coal wall side at 15 degrees, and the sprayed spray is sprayed toward the coal wall at 15 degrees along the wind.
In this embodiment, one side that is close to coal-winning machine 1 on the spraying body is provided with the injection mouth 52 that is used for inhaling the dust, and injection mouth 52 communicates with each other with fog jet 53, and the negative pressure that high-pressure water smoke that fog jet 53 jetted makes the dust inhale through injection mouth 52 to spout through fog jet 53 and water smoke, promote the dust fall effect.
In the embodiment, a high-pressure water pipe for conveying spray water is also arranged in the spray body, and the nozzle is communicated with the spray pump station through the high-pressure water pipe; the automatic control device 3 comprises a sensor 2 for acquiring position signals of the coal mining machine 1, a control box and an electromagnetic valve, the electromagnetic valve is installed on a high-pressure water pipe, the electromagnetic valve and the sensor 2 are both connected with the control box, the control box acquires the working position of the coal mining machine 1 through the sensor 2, and the control box controls the spraying to be opened and closed through the electromagnetic valve.
In the embodiment, the dust separation net 6 is further included, the dust separation net 6 is arranged on the front protective net of the hydraulic support 4 of the large mining height fully mechanized mining face, and the dust separation net is mainly used for preventing dust on the top of the hydraulic support 4 from diffusing into the hydraulic support 4.
The working process of the embodiment is as follows: after the coal mining machine 1 travels to a certain area, the sensor 2 senses the position information of the coal mining machine 1 and transmits a signal to the control box, the control box opens the coal mining machine 1 to spray at the downwind side, spray water is directly supplied by a spray pump station, and spray parameters are controlled as follows: spraying pressure: 4-10 MPa, water consumption: 15-20L/min, injecting negative pressure: 300-1000 Pa, injection air volume: 20 to 30m 3/min. Spraying is carried out along the wind and obliquely towards the coal wall for 15 degrees to form a high-pressure spraying water curtain obliquely from the coal wall of the front support of the coal mining machine, dust-containing airflow around the high-pressure water curtain is guided to the coal side according to the jet flow theory of hydrodynamics and the wall attachment effect to control the flow direction of dust, and meanwhile, secondary negative pressure injection is carried out on the dust-containing airflow diffused to the vicinity of the support stand column through the injection port 52 by negative pressure formed behind high-pressure spraying.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (8)
1. A large mining height fully mechanized coal mining face section dust control and removal method is characterized in that: and arranging a dust control spraying device at the leeward side of the coal mining machine, spraying high-pressure water mist obliquely to the coal wall along the windward flow direction, and controlling dust-containing air flow at the leeward side of the coal mining machine at the coal side.
2. The large mining height fully mechanized coal mining face section dust control and removal method according to claim 1, characterized in that: the dust-removing control spraying device is provided with an injection port, and the dust-containing air flow is sucked into the injection port by utilizing the negative pressure generated during the spraying of the high-pressure water mist and is sprayed out along with the high-pressure water mist.
3. The large mining height fully mechanized coal mining face section dust control and removal method according to claim 1, characterized in that: the spraying parameters of the dust control spraying device are as follows: spraying pressure: 4-10 MPa, water consumption: 15-20L/min, injecting negative pressure: 300-1000 Pa, injection air volume: 20 to 30m3/min。
4. The large mining height fully mechanized coal mining face section dust control and removal method according to claim 1, characterized in that: a dust isolating net is arranged on a hydraulic support of the working face to control dust to diffuse outwards.
5. The utility model provides a big mining height fully-mechanized coal mining face section accuse dust collector which characterized in that: the system comprises a dust control spraying device and an automatic control device, wherein the dust control spraying device is arranged on the downwind side of the coal mining machine, is connected with the automatic control device and is controlled by the automatic control device; the dust control spraying device comprises a dust control spraying body and a nozzle; a spray nozzle is arranged on one side of the spray body, which is far away from the coal mining machine, the nozzle is arranged in the spray nozzle and sprays outwards through the spray nozzle; the spray nozzle is inclined towards the coal wall side at a set angle.
6. The large mining height fully mechanized coal mining face section dust control and removal device of claim 5, characterized in that: the air inlet side of the spraying body is provided with an injection port for sucking dust, and the injection port is communicated with the spraying port.
7. The large mining height fully mechanized coal mining face section dust control and removal device of claim 5, characterized in that: the spraying body is also internally provided with a high-pressure water pipe for conveying spraying water, and the nozzle is connected with the high-pressure water pipe; the automatic control device comprises a control box, an electromagnetic valve and a sensor for acquiring a position signal of the coal mining machine, wherein the electromagnetic valve is arranged on the high-pressure water pipe, and the electromagnetic valve and the sensor are both connected with the control box.
8. The large mining height fully mechanized coal mining face section dust control and removal device of claim 5, characterized in that: the coal mining device further comprises a dust-proof net, and the dust-proof net is arranged on the hydraulic support of the coal mining working face.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110838323.8A CN113482699A (en) | 2021-07-23 | 2021-07-23 | Large-mining-height fully-mechanized coal mining face section dust control and removal method and device |
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| CN202110838323.8A CN113482699A (en) | 2021-07-23 | 2021-07-23 | Large-mining-height fully-mechanized coal mining face section dust control and removal method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115142844A (en) * | 2022-04-27 | 2022-10-04 | 中国矿业大学(北京) | Intelligent joint control accurate dust removal technology and complete process device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115142844A (en) * | 2022-04-27 | 2022-10-04 | 中国矿业大学(北京) | Intelligent joint control accurate dust removal technology and complete process device |
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