CN104819007A - Hydraulic bracket dust removal nozzle system - Google Patents
Hydraulic bracket dust removal nozzle system Download PDFInfo
- Publication number
- CN104819007A CN104819007A CN201510224574.1A CN201510224574A CN104819007A CN 104819007 A CN104819007 A CN 104819007A CN 201510224574 A CN201510224574 A CN 201510224574A CN 104819007 A CN104819007 A CN 104819007A
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- China
- Prior art keywords
- spray
- nozzle
- removing dust
- hydraulic
- dust
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Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
Abstract
The invention discloses a hydraulic bracket dust removal nozzle system. The hydraulic bracket dust removal nozzle system comprises a base (7), a top beam (1), a suspended vertical post (4), first, second and third hydraulic regulation and control systems; the first hydraulic regulation and control system comprises eight first dust removal nozzles which are arranged on the upper end face of the top beam (1); the second hydraulic regulation and control system comprises six dust removal nozzles which are arranged on the lower end face of the top beam (1); the third hydraulic regulation and control system comprises two third dust removal nozzles which are arranged on the chamfering middle part of the front end of the top beam (1). According to the invention, the positions of the nozzles are arranged reasonably based on the position where dust is produced, three independent hydraulic regulation and control systems are arranged, the spraying time is arranged based on production need, and all the hydraulic regulation and control system cooperate with each other to function together. Therefore, concentration of dust in the production environment is reduced when energy and water resource waste is avoided.
Description
Technical field
The present invention relates to a kind of hydraulic support Spray-nozzle for removing dust system of underground coal mine longwall face, belong to colliery spray for dust suppression technical field.
Background technology
At present, spray for dust suppression technology is widely used in dust Control.Spray for dust suppression utilizes the water smoke grain of high-speed motion to collide floating aerial dust granules, intercept and capture, trap, permanent set sedimentation, adopts this dust collection method, greatly will reduce dust concentration.Can produce a large amount of dust, severe contamination production environment in hydraulic moving stand and coal-winning machine coal cutting process, be the main cause causing workman's pneumoconiosis and downhole powder dust blast., must adopt an effective measure for this reason, reduce the dust concentration in production environment.At present, mainly in the centerline of the back timber lower surface of hydraulic support, some Spray-nozzle for removing dust are installed, Spray-nozzle for removing dust is not arranged in the middle part of hydraulic support top beam upper surface and Leading end chamfer, spray amount can be caused so too small, and coal-winning machine body upper dust and support move the dust that produces in frame process to diffusion between support and then the concentration causing effectively reducing dust.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of hydraulic support Spray-nozzle for removing dust system, based on dust production resource position, reasonable Arrangement nozzle location, arrange three independently hydraulic regulating systems, arrange spray time according to need of production, each hydraulic regulating system is worked in coordination with mutually, acting in conjunction, can reduce the dust concentration in production environment while avoiding the energy and water resource waste.
For achieving the above object, the technical solution used in the present invention is: a kind of hydraulic support Spray-nozzle for removing dust system, comprise base (7), back timber (1), described base (7) and back timber (1) are connected by hydraulic support and support, and be rotationally connected by upper plate (5) and lower plate (6) between the rear end of back timber (1) and base (7), also comprise first, second, third hydraulic regulating system; First hydraulic regulating system comprises eight the first Spray-nozzle for removing dust, described first Spray-nozzle for removing dust is arranged on the upper surface of back timber (1), and these eight first Spray-nozzle for removing dust are that axis of symmetry is divided into two rows with back timber (1) center line, often arrange four the first Spray-nozzle for removing dust, often each first Spray-nozzle for removing dust equidistant placement in row, the first hydraulic regulating system is connected by locking with between hydraulic support simultaneously; Second hydraulic regulating system comprises six the second Spray-nozzle for removing dust, described second Spray-nozzle for removing dust is arranged on the lower surface of back timber (1), and these six second Spray-nozzle for removing dust with back timber center line for axis of symmetry is divided into two rows, often arrange three the second Spray-nozzle for removing dust, simultaneously, described wherein four the second Spray-nozzle for removing dust are arranged between the first two suspension column (4), and another two the second Spray-nozzle for removing dust are arranged between latter two suspension column (4); 3rd hydraulic regulating system comprises two the 3rd Spray-nozzle for removing dust, and these two the 3rd Spray-nozzle for removing dust are arranged in the middle part of back timber (1) Leading end chamfer, and these two the 3rd Spray-nozzle for removing dust are arranged symmetrically with back timber center line simultaneously.
Preferred: the nozzle-axis of described first Spray-nozzle for removing dust, the second Spray-nozzle for removing dust is all vertical with back timber (1) end face; Described 3rd Spray-nozzle for removing dust is along the exterior normal direction of back timber (1) anterior chamfering; First Spray-nozzle for removing dust, the second Spray-nozzle for removing dust and the 3rd Spray-nozzle for removing dust are equal with the vertical distance on back timber (1) surface simultaneously.
Preferred: the jet dispersion angle θ of the first Spray-nozzle for removing dust, the second Spray-nozzle for removing dust and the 3rd Spray-nozzle for removing dust, wherein, 0 ° of < θ < 45 °.
Preferred: two trestle column that ranked first between Spray-nozzle for removing dust in described first hydraulic regulating system are 2x, the spacing of the first often adjacent in row Spray-nozzle for removing dust is y; The trestle column of the second Spray-nozzle for removing dust be positioned between the first two suspension column (4) in described second hydraulic regulating system is 2x, and the spacing of the second often adjacent in row Spray-nozzle for removing dust is z; Two trestle column that ranked third between Spray-nozzle for removing dust in described 3rd hydraulic regulating system are 2x; And distance x, y and z meet between the adjacent Spray-nozzle for removing dust of the first Spray-nozzle for removing dust, the second Spray-nozzle for removing dust, the 3rd Spray-nozzle for removing dust and jet interference do not occur.
Preferred: described first Spray-nozzle for removing dust, the second Spray-nozzle for removing dust and the 3rd Spray-nozzle for removing dust spray the mixing material of aqueous water and dust-removing additive.
The using method of a kind of hydraulic support Spray-nozzle for removing dust system in underground coal mine broadwall: the first hydraulic regulating system is in running order in hydraulic moving stand process, and realizes locking with hydraulic support; In whole recovery process, the second hydraulic regulating system is in running order, operates hydraulic support period second hydraulic regulating system be in closed condition support operative employee; In coal-winning machine coal cutting process, the 3rd hydraulic regulating system is in running order.
A kind of hydraulic support Spray-nozzle for removing dust system provided by the invention, compared to existing technology, has following beneficial effect:
Owing to being provided with three independently hydraulic regulating systems, in hydraulic moving stand (after falling frame and before rising frame) process, the first hydraulic regulating system is in running order, and realizes locking with hydraulic support; Inhibit after falling frame and rise the front dust because of roof cracking generation of frame.In recovery process, the second hydraulic regulating system is in running order, operate hydraulic support period second hydraulic regulating system support operative employee and be in closed condition, in reduction support operative employee working environment while dust concentration, prevent support operative employee from working under spray environment.In coal-winning machine coal cutting process, the 3rd hydraulic regulating system is in running order, reduces coal-winning machine body upper dust concentration, prevents coal-winning machine body upper dust from spreading between support.Therefore, major advantage of the present invention is as follows: 1, by arranging three independently hydraulic regulating systems, and arrange spray time according to need of production, each hydraulic regulating system is worked in coordination with mutually, acting in conjunction, can reduce the dust concentration in production environment while avoiding the energy and water resource waste.2, by arranging nozzle in the middle part of set cap upper surface and back timber Leading end chamfer, effectively the dust produced in frame and coal-winning machine coal cutting process can be moved by hydraulic control support.
3, adding spray amount by being arranged symmetrically with, the dust in faceman's working environment can be reduced to greatest extent.
Accompanying drawing explanation
Fig. 1 is general structure schematic diagram of the present invention;
Fig. 2 is back timber upper surface of the present invention arrangement of nozzles floor map;
Fig. 3 is back timber front end of the present invention and back timber lower surface arrangement of nozzles floor map.
In figure, 1-back timber; 2-bearing pin; 31-the first Spray-nozzle for removing dust; 32-the second Spray-nozzle for removing dust; 33-the three Spray-nozzle for removing dust; 4-suspension column; 5-upper plate; 6-lower plate; 7-base.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.
A kind of hydraulic support Spray-nozzle for removing dust system, as shown in Figure 1, comprise base 7, back timber 1, described base 7 and back timber 1 are connected by hydraulic support and support, shown hydraulic support comprises four suspension columns 4, suspension column 4 is connected with back timber 1 by bearing pin 2, is rotationally connected between the rear end of back timber 1 and base 7 by upper plate 5 and lower plate 6, also comprises first, second, third hydraulic regulating system; First hydraulic regulating system comprises eight the first Spray-nozzle for removing dust, described first Spray-nozzle for removing dust is arranged on the upper surface of back timber 1, and these eight first Spray-nozzle for removing dust with back timber 1 center line for axis of symmetry is divided into two rows, often arrange four the first Spray-nozzle for removing dust, often each first Spray-nozzle for removing dust equidistant placement in row, the first hydraulic regulating system is connected by locking with between hydraulic support simultaneously; When hydraulic moving stand, the first hydraulic regulating system is opened; If the first hydraulic regulating system is not opened, then hydraulic support can not move frame; Second hydraulic regulating system comprises six the second Spray-nozzle for removing dust, described second Spray-nozzle for removing dust is arranged on the lower surface of back timber 1, and these six second Spray-nozzle for removing dust with back timber center line for axis of symmetry is divided into two rows, often arrange three the second Spray-nozzle for removing dust, simultaneously, described wherein four the second Spray-nozzle for removing dust are arranged between the first two suspension column 4, and another two the second Spray-nozzle for removing dust are arranged between latter two suspension column 4; 3rd hydraulic regulating system comprises two the 3rd Spray-nozzle for removing dust, and these two the 3rd Spray-nozzle for removing dust are arranged in the middle part of back timber 1 Leading end chamfer, and these two the 3rd Spray-nozzle for removing dust are arranged symmetrically with back timber center line simultaneously.
The nozzle-axis of described first Spray-nozzle for removing dust, the second Spray-nozzle for removing dust is all vertical with back timber 1 end face; Described 3rd Spray-nozzle for removing dust is along the exterior normal direction of the anterior chamfering of back timber 1; First Spray-nozzle for removing dust, the second Spray-nozzle for removing dust and the 3rd Spray-nozzle for removing dust are equal with the vertical distance on back timber 1 surface simultaneously.
The jet dispersion angle θ of the first Spray-nozzle for removing dust, the second Spray-nozzle for removing dust and the 3rd Spray-nozzle for removing dust, wherein, 0 ° of < θ < 45 °.
As shown in Figure 2, two trestle column that ranked first between Spray-nozzle for removing dust in described first hydraulic regulating system are 2x, and the spacing of the first often adjacent in row Spray-nozzle for removing dust is y; As shown in Figure 2, the trestle column of the second Spray-nozzle for removing dust in described second hydraulic regulating system between the first two suspension column 4 is 2x, and the spacing of the second often adjacent in row Spray-nozzle for removing dust is z; Two trestle column that ranked third between Spray-nozzle for removing dust in described 3rd hydraulic regulating system are 2x; And distance x, y and z meet between the adjacent Spray-nozzle for removing dust of the first Spray-nozzle for removing dust, the second Spray-nozzle for removing dust, the 3rd Spray-nozzle for removing dust mutually non-interference.
Described first Spray-nozzle for removing dust, the second Spray-nozzle for removing dust and the 3rd Spray-nozzle for removing dust spray the mixing material of aqueous water and dust-removing additive.
A kind of arrangement of hydraulic support Spray-nozzle for removing dust, as shown in Figure 1, eight Spray-nozzle for removing dust are installed in the upper surface of hydraulic support top beam, as shown in Figure 2, by these eight Spray-nozzle for removing dust with back timber center line for axis of symmetry is divided into two rows, often arrange four Spray-nozzle for removing dust, often each Spray-nozzle for removing dust equidistant placement in row, mutual spacing is y; Wherein one gets rid of dirt arrangement of nozzles in the position apart from the wide x in back timber center line side, other one arranges Spray-nozzle for removing dust with back timber center line for axis of symmetry, be arranged in the other side of back timber center line, eight described Spray-nozzle for removing dust are all in running order in falling frame, move frame and rising the process of frame of hydraulic support, carry out spray for dust suppression; Six Spray-nozzle for removing dust are installed in the lower surface of hydraulic support top beam, wherein, as shown in Figure 3, between the first two suspension column of hydraulic support with back timber center line for axis of symmetry arranges four Spray-nozzle for removing dust, arrange between hydraulic support suspension column at two Spray-nozzle for removing dust of back timber center line side, spacing is z; In the middle of latter two suspension column of hydraulic support with back timber center line for axis of symmetry arranges two Spray-nozzle for removing dust; These six Spray-nozzle for removing dust with back timber center line for axis of symmetry, one gets rid of dirt arrangement of nozzles in the position apart from the wide x in back timber center line side, other one arranges Spray-nozzle for removing dust with back timber center line for axis of symmetry, be arranged in the other side of back timber center line, six described Spray-nozzle for removing dust are in running order in general manufacturing process, but are in closed condition during support operative employee operates support; In the middle part of hydraulic support top beam Leading end chamfer, with back timber center line for axis of symmetry arranges two Spray-nozzle for removing dust, one of them Spray-nozzle for removing dust is arranged in the position apart from the wide x in back timber center line side, another one is arranged symmetrically with, and two described Spray-nozzle for removing dust are all in running order in coal-winning machine coal cutting process; Described distance x, y and z all meet between all adjacent Spray-nozzle for removing dust and mutually do not interfere; Described all Spray-nozzle for removing dust are divided into three parts with back timber upper surface, back timber lower surface and back timber Leading end chamfer, form three independently hydraulic regulating systems; Eight Spray-nozzle for removing dust of described back timber upper surface are vertical with back timber end face with the nozzle-axis of six Spray-nozzle for removing dust of back timber lower surface; Two Spray-nozzle for removing dust in the middle part of described back timber Leading end chamfer are along the exterior normal direction of the anterior chamfering of back timber; The vertical distance on described all Spray-nozzle for removing dust distance back timber surface is equal, and the jet dispersion angle θ of described all Spray-nozzle for removing dust is: 0 ° of < θ < 45 °.Described all Spray-nozzle for removing dust are simultaneously by aqueous water and dust-removing additive two media.
The using method of a kind of hydraulic support Spray-nozzle for removing dust system in underground coal mine broadwall:
In hydraulic moving stand process, the first hydraulic regulating system is in running order, and realize locking with hydraulic support, as shown in Figure 1, 2, eight Spray-nozzle for removing dust of back timber upper surface form one can independent first hydraulic regulating system, and it is all in running order in hydraulic moving stand process, this the first hydraulic regulating system and hydraulic support realize locking simultaneously, even hydraulic moving stand, and the first Spray-nozzle for removing dust must be opened; If do not open, frame can not be moved.
In whole recovery process, the second hydraulic regulating system is in running order, operate hydraulic support period second hydraulic regulating system support operative employee and be in closed condition, as shown in Figure 1,3, six Spray-nozzle for removing dust of back timber lower surface form one can independent second hydraulic regulating system, in running order in process of production, but closed condition is in during support operative employee operates support.
In coal-winning machine coal cutting process, the 3rd hydraulic regulating system is in running order, and as shown in Figure 1,3, two Spray-nozzle for removing dust in the middle part of back timber Leading end chamfer form one can independent 3rd hydraulic regulating system, all in running order in coal-winning machine coal cutting process.
Field measurement shows, and at underground coal mine longwall face, the dust that the roof cracking caused because of hydraulic moving stand produces accounts for about 45% of total dust, and about 55% of remainder is the dust that coal-winning machine coal cutting produces.A kind of hydraulic support Spray-nozzle for removing dust system provided by the invention, by installing the first Spray-nozzle for removing dust in back timber upper surface, will effectively control the dust of 45%; By installing the 3rd Spray-nozzle for removing dust in the middle part of back timber Leading end chamfer, will effectively control the dust of coal-winning machine coal cutting produces 55% to loss between support; By installing the second Spray-nozzle for removing dust in back timber lower surface, the dust concentration between support will be reduced further.In addition, because dust has the characteristic spread to low concentration region by high concentration, therefore the dust that the roof cracking that hydraulic moving stand causes produces can to back timber front end and the diffusion of back timber lower surface, and the dust that the first Spray-nozzle for removing dust absolutely can not control the diffusion of this part is completely effectively installed in back timber upper surface, now, owing to being provided with second, third Spray-nozzle for removing dust, therefore, it is possible to further control the dust being diffused into this region.And the dust that coal-winning machine coal cutting produces, by the 3rd, the second Spray-nozzle for removing dust carries out effective control in first, second stage, and is diffused into back timber upper surface dust and controlled by the first Spray-nozzle for removing dust.Therefore, by three not only independent but also unified hydraulic regulating systems, each hydraulic regulating system is worked in coordination with mutually, acting in conjunction, on the one hand can effectively energy conservation and water resource, and another aspect effectively can control dust recycling.And traditional hydraulic support dedusting spraying system, just in the centerline of back timber lower surface, some Spray-nozzle for removing dust are installed, in the middle part of hydraulic support top beam upper surface and Leading end chamfer, do not arrange Spray-nozzle for removing dust, dust removing effects is not good, does not reach national safety regulations in coal mine prescribed limits.A kind of hydraulic support Spray-nozzle for removing dust system that the application of the invention provides, will effectively suppress above-mentioned dust everywhere, makes the 1mg/m that the dust concentration in the working environment of workers will be reduced to national safety regulations in coal mine and specifies
3concentration limit, prevention workman's pneumoconiosis and the generation of downhole powder dust explosion accident.
From the above, the present invention is by arranging three independently hydraulic regulating systems, and arrange spray time according to need of production, each hydraulic regulating system is worked in coordination with mutually, acting in conjunction, can reduce the dust concentration in production environment while avoiding the energy and water resource waste; By arranging nozzle in the middle part of set cap upper surface and back timber Leading end chamfer, effectively the dust produced in frame and coal-winning machine coal cutting process can be moved by hydraulic control support; Adding spray amount by being arranged symmetrically with, the dust in faceman's working environment can be reduced to greatest extent.Therefore the independent hydraulically controlled regulator control system of the present invention's setting, reasonable Arrangement nozzle location, reduces the dust concentration in coal mining production environment, arranges spray time according to need of production, increase spray amount, while avoiding the energy and water resource waste, reduce the dust concentration in production environment.Therefore the present invention is based on dust production resource position, reasonable Arrangement nozzle location, three independently hydraulic regulating systems are set, spray time is arranged according to need of production, each hydraulic regulating system is worked in coordination with mutually, acting in conjunction, can reduce the dust concentration in production environment while avoiding the energy and water resource waste.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. a hydraulic support Spray-nozzle for removing dust system, comprise base (7), back timber (1), described base (7) and back timber (1) are connected by hydraulic support and support, and be rotationally connected by upper plate (5) and lower plate (6) between the rear end of back timber (1) and base (7), it is characterized in that: also comprise first, second, third hydraulic regulating system; First hydraulic regulating system comprises eight the first Spray-nozzle for removing dust, described first Spray-nozzle for removing dust is arranged on the upper surface of back timber (1), and these eight first Spray-nozzle for removing dust are that axis of symmetry is divided into two rows with back timber (1) center line, often arrange four the first Spray-nozzle for removing dust, often each first Spray-nozzle for removing dust equidistant placement in row, the first hydraulic regulating system is connected by locking with between hydraulic support simultaneously; Second hydraulic regulating system comprises six the second Spray-nozzle for removing dust, described second Spray-nozzle for removing dust is arranged on the lower surface of back timber (1), and these six second Spray-nozzle for removing dust with back timber center line for axis of symmetry is divided into two rows, often arrange three the second Spray-nozzle for removing dust, simultaneously, described wherein four the second Spray-nozzle for removing dust are arranged between the first two suspension column (4), and another two the second Spray-nozzle for removing dust are arranged between latter two suspension column (4); 3rd hydraulic regulating system comprises two the 3rd Spray-nozzle for removing dust, and these two the 3rd Spray-nozzle for removing dust are arranged in the middle part of back timber (1) Leading end chamfer, and these two the 3rd Spray-nozzle for removing dust are arranged symmetrically with back timber center line simultaneously.
2. hydraulic support Spray-nozzle for removing dust system according to claim 1, is characterized in that: the nozzle-axis of described first Spray-nozzle for removing dust, the second Spray-nozzle for removing dust is all vertical with back timber (1) end face; Described 3rd Spray-nozzle for removing dust is along the exterior normal direction of back timber (1) anterior chamfering; First Spray-nozzle for removing dust, the second Spray-nozzle for removing dust and the 3rd Spray-nozzle for removing dust are equal with the vertical distance on back timber (1) surface simultaneously.
3. hydraulic support Spray-nozzle for removing dust system according to claim 1, it is characterized in that: the jet dispersion angle θ of the first Spray-nozzle for removing dust, the second Spray-nozzle for removing dust and the 3rd Spray-nozzle for removing dust, wherein, 0 ° of < θ < 45 °.
4. hydraulic support Spray-nozzle for removing dust system according to claim 1, is characterized in that: two trestle column that ranked first between Spray-nozzle for removing dust in described first hydraulic regulating system are 2x, and the spacing of the first often adjacent in row Spray-nozzle for removing dust is y; The trestle column of the second Spray-nozzle for removing dust be positioned between the first two suspension column (4) in described second hydraulic regulating system is 2x, and the spacing of the second often adjacent in row Spray-nozzle for removing dust is z; Two trestle column that ranked third between Spray-nozzle for removing dust in described 3rd hydraulic regulating system are 2x; And distance x, y and z meet between the adjacent Spray-nozzle for removing dust of the first Spray-nozzle for removing dust, the second Spray-nozzle for removing dust, the 3rd Spray-nozzle for removing dust and jet interference do not occur.
5. hydraulic support Spray-nozzle for removing dust system according to claim 1, is characterized in that: described first Spray-nozzle for removing dust, the second Spray-nozzle for removing dust and the 3rd Spray-nozzle for removing dust spray the mixing material of aqueous water and dust-removing additive.
6., based on the using method of hydraulic support Spray-nozzle for removing dust system according to claim 1 in underground coal mine broadwall, it is characterized in that: in hydraulic moving stand process, the first hydraulic regulating system is in running order, and realizes locking with hydraulic support; In whole recovery process, the second hydraulic regulating system is in running order, operates hydraulic support period second hydraulic regulating system be in closed condition support operative employee; In coal-winning machine coal cutting process, the 3rd hydraulic regulating system is in running order.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510224574.1A CN104819007A (en) | 2015-05-05 | 2015-05-05 | Hydraulic bracket dust removal nozzle system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510224574.1A CN104819007A (en) | 2015-05-05 | 2015-05-05 | Hydraulic bracket dust removal nozzle system |
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| CN104819007A true CN104819007A (en) | 2015-08-05 |
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| CN201510224574.1A Pending CN104819007A (en) | 2015-05-05 | 2015-05-05 | Hydraulic bracket dust removal nozzle system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109695465A (en) * | 2018-12-05 | 2019-04-30 | 山东塔高矿业机械装备制造有限公司 | Hydraulic device for sublevel caving hydrau lic support |
| WO2020006815A1 (en) * | 2018-07-02 | 2020-01-09 | 山东科技大学 | Dust isolation and dust settling method and dust isolation and dust settling system for dust production due to cutting of coal mining machine |
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Application publication date: 20150805 |