Absorption-induction convectional dust-controlling/removing air/fog curtain device of fully-mechanized working face and method thereof

Abstract

An absorption-induction convectional dust-controlling/removing air/fog curtain device of a fully-mechanized working face and a method thereof, wherein the device includes an extraction type dust-purifying blower, a sector deflector, a shearer external spraying device and an inter-hydraulic-support spraying device. The shearer external spraying devices are mounted at both sides of a shearer body close to rocking arms of a shearer and the inter-hydraulic-support spraying devices are mounted at two un-advanced hydraulic supports and two hydraulic supports at a leeward side of a front drum of the shearer respectively. Two extraction type dust-purifying blowers symmetrically mounted at the rocking arm close to the body of the shearer are started simultaneously with their air inlets exactly facing front and rear drums of the shearer respectively, and air outlets connected with the sector deflector. With the device and the method, the working environment is improved and safe production of the coal mine is guaranteed.

Claims

1. An absorption-induction convectional dust-controlling/removing method of a fully-mechanized working face using an absorption-induction convectional dust-controlling/removing air/fog curtain device of a fully-mechanized working face, comprising an extraction type dust-purifying blower, a sector deflector, a shearer external spraying device and an inter-hydraulic-support spraying device, wherein, there are two extraction type dust-purifying blowers symmetrically disposed at a body of a shearer close to rocking arms respectively; an air inlet and an air outlet are disposed on each of the extraction type dust-purifying blowers, the air inlets both directly face front and rear drums of the shearer, and the air outlets are connected with the sector deflectors; the shearer external spraying devices are mounted at both sides of the body of the shearer close to the rocking arms and spray onto the front and rear drums at a certain angle to form a fog curtain and thus perform spraying precipitation for part of dusts produced when the front and rear drums of the shearer perform cutting; the inter-hydraulic-support spraying devices are mounted at two un-advanced hydraulic supports and two hydraulic supports at a leeward side of the front drum of the shearer respectively and spray toward a coal wall at a certain angle to form a fog curtain in a machine channel space so as to prevent part of dusts from spreading pollution toward windward and leeward sides; sequentially comprising the following steps: at step S1, forming fog curtains at corresponding positions by starting the inter-hydraulic-support spraying device and the shearer external spraying device to wrap a large amount of dusts produced during support advancing and coal cutting, such that part of dusts combine with fog droplets to precipitate; starting the extraction type dust-purifying blowers simultaneously to centrifugally remove part of high-concentration dusts produced by coal cutting of the shearer by sucking the part of high-concentration dusts into the extraction type dust-purifying blowers through a negative pressure generated by rotation of impellers, wherein air has an increased momentum under push of blades and a high-speed air current field is formed at the air outlet; and at step S2, by the sector deflector, spreading an original columnar air current toward a roof and a floor of a roadway respectively in a vertical space to form an air curtain with a sector area gradually increasing, so as to block dusts that are not captured and precipitated by spraying; and forming a basically-closed full-section dust-purifying air chamber in a working region of a shearer operator to induce a large amount of high-concentration dusts blocked by the air-fog curtain and fog droplets generated by spraying into a goaf through air current, so that the dusts continuously combine with the fog droplets to precipitate during spreading toward the leeward side so as to prevent the dusts in the goaf from returning to the working face along with the air current.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The present disclosure will be further described below in combination with accompanying drawings.

(2) (1a), (1b) and (1c) of FIG. 1 are front views of dust precipitation effects demonstrated before and after a novel absorption-induction convectional dust-controlling/removing air/fog curtain device of a fully-mechanized working face and a method thereof are implemented according to an example of the present disclosure.

(3) (2a), (2b) and (2c) of FIG. 2 are rear views of dust precipitation effects demonstrated before and after a novel absorption-induction convectional dust-controlling/removing air/fog curtain device of a fully-mechanized working face and a method thereof are implemented according to an example of the present disclosure.

(4) FIG. 3 is a left view after a novel absorption-induction convectional dust-controlling/removing air/fog curtain device of a fully-mechanized working face is implemented according to an example of the present disclosure.

(5) Numerals of the drawings are described as follows:

(6) 1—inter-hydraulic-support spraying, 2—inter-hydraulic-support spraying device, 3—shearer external spraying, 4—drum, 5—dust absorption, 6—extraction type dust-purifying blower, 7—shearer, 8—operator position, 9—air curtain, 10—shearer external spraying device, 11—dust-fog coupling particle, 12—fog droplet, 13—dust particle, 14—goaf, 15—hydraulic support, 16—sector deflector, 1a-1c are front views comparing dust precipitation effects before and after implementation, and 2a-2c are rear views comparing dust precipitation effects before and after implementation.

DETAILED DESCRIPTION OF THE EMBODIMENTS

(7) The present disclosure provides an absorption-induction convectional dust-controlling/removing air/fog curtain device of a fully-mechanized working face and a method thereof. To understand the advantages and the technical solution of the present disclosure more clearly, the present disclosure will be described in detail below in combination with specific examples.

(8) As shown in FIGS. 1-3, an absorption-induction convectional dust-controlling/removing air/fog curtain device of a fully-mechanized working face of the present disclosure includes an inter-hydraulic-support spraying device 2, a drum 4, an extraction type dust-purifying blower 6, a shearer 7, a shearer external spraying device 10, a hydraulic support 15 and a sector deflector 16. An absorption-induction convectional dust-controlling/removing air/fog curtain method of a fully-mechanized working face mainly includes a method of combination of dust absorption 5 and purification, dust blocking by a convectional air curtain 9, and induction of dust particles 13 into goaf 14, and spraying precipitation and can realize effective control for dust production of two working procedures coal cutting and support advancing by mounting corresponding devices on the shearer 7 and the hydraulic supports.

(9) The convectional dust-controlling/removing air curtain 9 is formed under the joint action of two extraction type dust-purifying blowers 6 and a sector deflector 16. A method of blocking dust by the air curtain 9 includes: symmetrically mounting two extraction type dust-purifying blowers 6 at a body of the shearer 7 close to a rocking arm, where air inlets directly face front and rear drums 4 of the shearer 7 respectively and air outlets are connected with the sector deflector 16. When the blower is started, part of dusts produced when the drum 4 of the shearer performs cutting are sucked into the air inlet, a basically-closed full-section dust-purifying air chamber is formed at an operator position 8 of the shearer due to formation of the sector air curtain 9 at the air outlet so as to prevent the dusts from entering the working region of the operator as possible. The comprehensive dust-controlling device on the entire shearer 7 is started or stopped along with the shearer.

(10) The shearer external spraying devices 10 are mounted at both sides of the body of the shearer 7 close to the rocking arms and spray onto the front and rear drums 4 at a certain angle to form a fog curtain and thus perform spraying precipitation for part of dusts produced when the front and rear drums 4 of the shearer perform cutting; the inter-hydraulic-support spraying devices 2 are mounted at two un-advanced hydraulic supports 15 and two hydraulic supports of a leeward side of the front drum of the shearer respectively and spray toward a coal wall at a certain angle to form a fog curtain in a machine channel space and thus prevent part of dusts from spreading pollution toward windward and leeward sides. Air-fog curtain formed by combining the air curtain 9 formed by the extraction type dust-purifying blower 6 with the fog droplets generated by spraying may induce dust particles 13 and fog droplets 12 into the goaf while blocking dusts, so that part of dust particles 13 in the goaf 14 are continuously wrapped by the droplets 12 14 when spreading toward the leeward side. Thus, dust-fog coupling particles 11 are formed to accelerate precipitation of dusts in the goaf during spreading.

(11) The novel absorption-induction convectional dust-controlling/removing method of a fully-mechanized working face is performed as follows: fog curtains are formed at corresponding positions by starting inter-hydraulic-support spraying 1 and shearer external spraying 3 to wrap a large amount of dusts produced during support advancing and coal cutting, so that part of dust particles 13 combine with the fog droplets 12 to precipitate so as to substantially reduce dust pollution toward a sidewalk; the extraction type dust-purifying blower 6 is started simultaneously to centrifugally remove part of high-concentration dusts produced by coal cutting of the shearer 7 by sucking the part into the extraction type dust-purifying blower by a negative pressure generated through rotation of impellers; pushed by blades, the air has an increased momentum, and a high-speed air current field is generated at the air outlet; the sector deflector 16 connected with the air outlet spreads an original columnar air current toward a roof and a floor of a roadway respectively in a vertical space to form an air curtain 9 with its sector area gradually increasing so as to further block dusts that are not captured and precipitated by the shearer external spraying 3 and the inter-hydraulic-support spraying 1; the basically-closed full-section dust-purifying air chamber is formed in the working region of the shearer operator by the convectional air curtain 9 generated by the blower 6 so as to effectively reduce threat posed by the high-concentration dusts to physical and mental health of the shearer operator 8; the dust particles 13 and the fog droplets 12 generated by the inter-hydraulic-support spraying 1 and the shearer external spraying 3 are induced into the goaf 14 while a large amount of dusts blocked by the air curtain 9 spread pollution toward the leeward side. In this way, the dusts in the goaf are continuously wrapped by the fog droplets 12 during spreading, thereby accelerating the dust precipitation and preventing the dusts in the goaf 14 from returning to the working face along with the air current.

(12) In the present disclosure, a series of measures taken in the entire dust-control/removal process are safe and reliable, so that the dusts produced in the coal mining process of the fully-mechanized working face, especially the high-concentration dusts produced in the working region of the shearer operator can be effectively controlled, thereby creating a clean and safe production environment for workers.

(13) Parts unmentioned in the present disclosure may be realized by adopting or referring to the prior art.

(14) It is to be noted that any equivalents or obvious modifications made by those skilled in the art under the teachings of the present specification shall be encompassed in the scope of protection of the present disclosure.