CN111322102A - Protection device and supporting system between hydraulic supports - Google Patents
Protection device and supporting system between hydraulic supports Download PDFInfo
- Publication number
- CN111322102A CN111322102A CN202010173211.0A CN202010173211A CN111322102A CN 111322102 A CN111322102 A CN 111322102A CN 202010173211 A CN202010173211 A CN 202010173211A CN 111322102 A CN111322102 A CN 111322102A
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- hydraulic
- side plate
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- bracket
- supports
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- 230000001012 protector Effects 0.000 claims description 17
- 238000005065 mining Methods 0.000 abstract description 6
- 239000010878 waste rock Substances 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D23/03—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor having protective means, e.g. shields, for preventing or impeding entry of loose material into the working space or support
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention provides a protection device and a support system between hydraulic supports, relates to the technical field of mining equipment, and aims to solve the technical problem that the safety of workers is threatened due to the fact that the distance between the existing hydraulic supports is too large. The inter-hydraulic-bracket protection device comprises a straight plate and a first side plate; the straight plate is connected with the first side plate; when the first side plate is connected to the hydraulic supports, the straight plate is located between two adjacent hydraulic supports and shields a gap between the two adjacent hydraulic supports. The supporting system comprises a plurality of hydraulic supports in linear array and a plurality of protection devices among the hydraulic supports. The technical scheme of the invention prevents the gangue from damaging workers, protects the safety of the workers and ensures the safe mining of the working face.
Description
Technical Field
The invention relates to the technical field of mining equipment, in particular to a hydraulic inter-support protection device and a support system.
Background
In the super-large mining height exploitation process, the difficulty in control and coordination between supports caused by the self weight of the ultrahigh working face hydraulic support is high, the distance between adjacent ultrahigh working face hydraulic supports is too large, the top leakage can produce waste rocks, and the falling waste rocks can injure workers who work and threaten the safety of the workers.
Disclosure of Invention
The invention aims to provide a hydraulic support protection device and a support system, and aims to solve the technical problem that the safety of workers is threatened due to the fact that the distance between the existing hydraulic supports is too large.
In a first aspect, the present invention provides an inter-hydraulic-bracket protection device, which includes a straight plate and a first side plate;
the straight plate is connected to the first side plate;
when the first side plate is connected to the hydraulic supports, the straight plate is located between two adjacent hydraulic supports and shields a gap between the two adjacent hydraulic supports.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the straight plate is perpendicular to the first side plate, and a width of the straight plate is greater than a distance between two adjacent hydraulic supports;
when the first side plate is connected to the hydraulic support, the first side plate is vertically arranged.
With reference to the first aspect, in a second possible implementation manner of the first aspect, the length of the straight plate is equal to the protection width of the hydraulic bracket after being unfolded.
With reference to the first aspect, in a third possible implementation manner of the first aspect, the inter-hydraulic-bracket protection device further includes a second side plate, where the second side plate is connected to the straight plate, and the straight plate is located between the first side plate and the second side plate.
With reference to the first aspect, in a fourth possible implementation manner of the first aspect, a connection structure is arranged on the first side plate, and the connection structure is used for connecting the first side plate with a hydraulic support.
With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the connection structure includes a through hole formed in the first side plate, and a screw passes through the through hole and then is connected to the hydraulic support.
With reference to the fourth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the connecting structure includes a first overlapping plate, and the first overlapping plate is connected to the first side plate and forms a corner with the first side plate, so as to overlap with a top surface of the hydraulic bracket.
With reference to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, the connecting structure further includes a second overlapping plate, and the second overlapping plate is connected to the straight plate and located on the same plane as the first overlapping plate, and is used for overlapping top surfaces of adjacent hydraulic supports.
In a second aspect, the present invention provides a timbering system comprising a plurality of hydraulic supports in a linear array, and a plurality of inter-hydraulic support protection devices as described above;
the first side plate is connected to the hydraulic supports, and the straight plate is located between two adjacent hydraulic supports and shields a gap between the two adjacent hydraulic supports.
With reference to the second aspect, in a first possible implementation manner of the second aspect, the straight plate is inclined downward in a front-to-rear direction of the hydraulic bracket.
By combining the technical scheme, the beneficial effects brought by the invention are analyzed as follows:
the invention provides a hydraulic inter-bracket protection device which comprises a straight plate and a first side plate, wherein the straight plate is connected with the first side plate; when the first side plate is connected to the hydraulic supports, the straight plate is located between two adjacent hydraulic supports and shields a gap between the two adjacent hydraulic supports. The first side plate is connected with the hydraulic support to realize the installation of the protection device between the hydraulic supports, and gangue produced by the top leakage between the adjacent hydraulic supports can fall on the straight plate, so that the gangue is prevented from injuring workers, the safety of the workers is protected, and the safe exploitation of the working face is ensured.
The invention also provides a supporting system which comprises a plurality of hydraulic support inter-protection devices and a plurality of linear array hydraulic supports, wherein each hydraulic support inter-protection device comprises a straight plate and a first side plate; the first side plate is connected to the top of the hydraulic support; the straight plate is connected to the first side plate, is located between two adjacent hydraulic supports and shields a gap between the two adjacent hydraulic supports. A plurality of hydraulic supports can bear the mine pressure of coal face, and first curb plate and hydraulic support are connected and have been realized this hydraulic support inter-protector's installation, and the waste rock of the top-leakage output between the adjacent hydraulic support can drop on the straight board, has prevented that the waste rock from smashing the staff, has protected staff's safety, has guaranteed the working face safety mining.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a protection device between hydraulic brackets according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a hydraulic support inter-support protection device provided in an embodiment of the present invention connected to a hydraulic support;
fig. 3 is a schematic structural diagram of the inter-hydraulic-bracket protection device provided by the embodiment of the invention, which is located between two adjacent hydraulic brackets.
Icon: 10-a hydraulic support; 20-hydraulic inter-support protection devices; 21-straight plate; 22-a first side panel; 221-a through hole; 23-second side panel.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
The present embodiment provides a hydraulic inter-bracket protection device 20, please refer to fig. 1 to 3 of the drawings of the specification together.
Referring to fig. 1, the inter-hydraulic-bracket protector 20 includes a straight plate 21 and a first side plate 22, and the straight plate 21 is connected to the first side plate 22. Referring to fig. 3, a plurality of hydraulic supports 10 are arranged at intervals along a straight line, and when the first side plate 22 is connected to the hydraulic supports 10, the straight plate 21 is located between two adjacent hydraulic supports 10 and blocks a gap between the two adjacent hydraulic supports 10.
The installation that has realized protection device 20 between this hydraulic support is connected with hydraulic support 10 to first curb plate 22, and the waste rock of the output of leaking between the adjacent hydraulic support 10 can fall on straight board 21, has prevented that the waste rock from smashing the staff, has protected staff's safety, has guaranteed the safe exploitation of working face.
Referring to fig. 1, the straight plate 21 is perpendicular to the first side plate 22, and the width of the straight plate 21 is greater than the distance between two adjacent hydraulic supports 10. Referring to fig. 2, when the first side plate 22 is connected to the hydraulic support 10, the first side plate 22 is vertically disposed, and since the width of the straight plate 21 is greater than the distance between two adjacent hydraulic supports 10, one side of the straight plate 21, which is far away from the first side plate 22, extends into the lower portion of the adjacent hydraulic support 10, so that the straight plate 21 can block the gap between two adjacent hydraulic supports 10.
Of course, the straight plate 21 and the first side plate 22 may also form an acute angle or an obtuse angle, in this case, the width of the straight plate 21 is enough to block the gap between two adjacent hydraulic supports 10, and the width of the straight plate 21 is not limited to be larger than the distance between two adjacent hydraulic supports 10.
Referring to fig. 2, the length of the straight plate 21 is equal to the protection width of the hydraulic bracket 10 after being unfolded. After the hydraulic supports 10 are unfolded, the straight plate 21 extends into the lower part of the adjacent hydraulic support 10, and the length of the straight plate 21 is equal to the protection width of the unfolded hydraulic support 10, so that the straight plate 21 can not only shield the gap between the two hydraulic supports 10, but also avoid the interference of the straight plate 21 and the adjacent hydraulic support 10.
Referring to fig. 1, the inter-hydraulic-bracket protector 20 further includes a second side plate 23, the second side plate 23 is connected to the straight plate 21, and the straight plate 21 is located between the first side plate 22 and the second side plate 23. The gangue falling on the straight plate 21 can be blocked by the second side plate 23 and also can be blocked by the first side plate 22, so that the gangue is prevented from rolling down below the hydraulic support 10 from the straight plate 21 to injure workers.
The first side plate 22 is provided with a connecting structure, and the connecting structure is used for connecting the first side plate 22 with the hydraulic support 10.
Fig. 1 to 3 show one form of the connection structure, which includes a through hole 221 provided in the first side plate 22, and a screw is connected to the hydraulic bracket 10 after passing through the through hole 221.
Specifically, a threaded hole corresponding to the through hole 221 in the first side plate 22 is formed in the hydraulic support 10, and the front end of the screw penetrates through the through hole 221 to be connected with the threaded hole in the hydraulic support 10, so that the first side plate 22 is connected with the hydraulic support 10. When the hydraulic support 10 is retracted, the screw can be unscrewed, and the inter-hydraulic-support protector 20 can be detached from the hydraulic support 10.
Fig. 1 shows that two through holes 221 are formed in the first side plate 22, two threaded holes are formed in the hydraulic support 10, and when the first side plate 22 is connected with the hydraulic support 10, two screws respectively penetrate through the two through holes to be connected with the hydraulic support 10, so that the first side plate 22 is prevented from rotating after being connected with the hydraulic support 10. Of course, the first side plate 22 is also provided with one, three, or other numbers of through holes 221 to realize connection with the hydraulic bracket 10.
The connection structure may take other forms than the specific form of the connection structure shown in fig. 1 to 3. For example, the connecting structure includes a first lap plate connected to the first side plate 22 and forming a corner with the first side plate 22 for overlapping the top surface of the hydraulic bracket 10. After the hydraulic support 10 is unfolded, the top surface of the hydraulic support 10 is supported on the top surface of the roadway, and the first lap plate is pressed between the top surface of the roadway and the top surface of the hydraulic support 10; when the hydraulic bracket 10 is retracted, the inter-hydraulic-bracket protector 20 can be removed from the hydraulic bracket 10. The first strap facilitates the mounting and dismounting of the inter-hydraulic bracket protector 20 on the hydraulic bracket 10.
Connection structure is on the basis including first bridging plate, connection structure still includes the second bridging plate, the second bridging plate is connected in straight board 21 and is located the coplanar with first bridging plate, a top surface for the overlap joint is at adjacent hydraulic support 10, the second bridging plate is pressed between the top surface of tunnel top surface and another hydraulic support 10, first bridging plate and second bridging plate make protection device 20 between this hydraulic support install more firmly, also make protection device 20 between this hydraulic support can bear great external force, can bear great waste rock.
Example two
This embodiment provides a support system, please refer to fig. 1 to 3 in the drawings of the specification together.
Referring to fig. 2 and 3, the supporting system includes a plurality of hydraulic supports 10 in a linear array, and a plurality of hydraulic inter-support protection devices 20 provided in one embodiment.
The inter-hydraulic-bracket protector 20 includes a straight plate 21 and a first side plate 22, and the straight plate 21 is connected to the first side plate 22. The first side plate 22 is connected to the hydraulic supports 10, located between two adjacent hydraulic supports 10 and blocks a gap between the two adjacent hydraulic supports 10.
A plurality of hydraulic support 10 can bear the mine pressure of coal face, and first curb plate 22 is connected with hydraulic support 10 and has realized the installation of protection device 20 between the hydraulic support, and the waste rock of the output of leaking between the adjacent hydraulic support 10 can fall on straight board 21, has prevented that the waste rock from smashing the staff, has protected staff's safety, has guaranteed the working face safety mining.
Referring to fig. 2, the straight plate 21 is inclined downward in a front-to-rear direction of the hydraulic mount 10. The gangue falling on the straight plate 21 rolls along the inclined direction of the straight plate 21 and finally falls behind the hydraulic support 10, so that the gangue is prevented from falling in front of the hydraulic support 10 to injure workers, and the gangue accumulated on the straight plate 21 is prevented from being damaged to damage the inter-hydraulic-support protection device 20.
Referring to fig. 1, the straight plate 21 is perpendicular to the first side plate 22, and the width of the straight plate 21 is greater than the distance between two adjacent hydraulic supports 10. Referring to fig. 2, the first side plate 22 is connected to the hydraulic supports 10, and the first side plate 22 is vertically disposed, so that the width of the straight plate 21 is greater than the distance between two adjacent hydraulic supports 10, and the straight plate 21 can block the gap between two adjacent hydraulic supports 10.
Of course, an acute angle or an obtuse angle may also be formed between the straight plate 21 and the first side plate 22, at this time, the width of the straight plate 21 may be enough to block a gap between two adjacent hydraulic supports 10, the width of the straight plate 21 is not limited to be greater than a distance between two adjacent hydraulic supports 10, and the width of the straight plate 21 may be greater than a distance between two adjacent hydraulic supports 10, or may be smaller than a distance between two adjacent hydraulic supports 10.
Referring to fig. 2, the length of the straight plate 21 is equal to the protection width of the hydraulic bracket 10 after being unfolded. After the hydraulic supports 10 are unfolded, the straight plate 21 extends into the lower part of the adjacent hydraulic support 10, and the length of the straight plate 21 is equal to the protection width of the unfolded hydraulic support 10, so that the straight plate 21 can not only shield the gap between the two hydraulic supports 10, but also avoid the interference of the straight plate 21 and the adjacent hydraulic support 10.
Referring to fig. 1, the inter-hydraulic-bracket protector 20 further includes a second side plate 23, the second side plate 23 is connected to the straight plate 21, and the straight plate 21 is located between the first side plate 22 and the second side plate 23. The gangue falling on the straight plate 21 can be blocked by the first side plate 22 and the second side plate 23, so that the gangue cannot roll off from the edge where the first side plate 22 is located or the edge where the second side plate 23 is located, and the gangue is prevented from rolling off below any hydraulic support 10 from the straight plate 21 to injure workers.
The first side plate 22 is provided with a connecting structure, and the connecting structure is used for connecting the first side plate 22 with the hydraulic support 10.
Fig. 1 to 3 show one form of the connection structure, the connection structure includes a through hole 221 opened on the first side plate 22, and a screw passes through the through hole 221 and then is connected with the hydraulic support 10, thereby realizing the installation of the protector between the hydraulic supports on the hydraulic support 10.
Specifically, threaded holes corresponding to the through holes 221 in the first side plate 22 are formed in the hydraulic support 10, the number of the through holes 221 is the same as that of the threaded holes, the front ends of the screws penetrate through the through holes 221 to be connected with the threaded holes in the hydraulic support 10, and then the first side plate 22 is connected with the hydraulic support 10. When the hydraulic support 10 is retracted, the screw can be unscrewed, and the inter-hydraulic-support protector 20 can be detached from the hydraulic support 10.
Fig. 1 shows that two through holes 221 are formed in the first side plate 22, two threaded holes are formed in the hydraulic support 10, and when the first side plate 22 is connected with the hydraulic support 10, two screws respectively penetrate through the two through holes 221 to be connected with the hydraulic support 10, so that the first side plate 22 is prevented from rotating after being connected with the hydraulic support 10.
Of course, the first side plate 22 is also provided with one, three, or other through holes 221 for screws to pass through and achieve connection with the hydraulic bracket 10.
The connection structure may take other forms than the specific form of the connection structure shown in fig. 1 to 3. For example, the connecting structure includes a first lap plate connected to the first side plate 22 and forming a corner with the first side plate 22 for overlapping the top surface of the hydraulic bracket 10.
When the hydraulic support 10 is unfolded, the top surface of the hydraulic support 10 is supported on the top surface of the roadway, and the first lap plate is pressed between the top surface of the roadway and the top surface of the hydraulic support 10; when the hydraulic bracket 10 is retracted, the inter-hydraulic-bracket protector 20 can be removed from the hydraulic bracket 10. The first strap facilitates the mounting and dismounting of the inter-hydraulic-bracket protector 20 on the hydraulic bracket 10.
On the basis of including the first overlap joint board, connection structure still includes the second overlap joint board, and the second overlap joint board is connected in straight board 21 and is located the coplanar with the first overlap joint board for the top surface at adjacent hydraulic support 10 of overlap joint.
After the hydraulic support 10 is unfolded, the second lapping plate is pressed between the top surface of the roadway and the top surface of another hydraulic support 10, the first lapping plate and the second lapping plate enable the protection device 20 between the hydraulic supports to be installed more firmly, and the protection device 20 between the hydraulic supports can bear larger external force and can bear larger gangue.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A protector between hydraulic supports is characterized by comprising a straight plate (21) and a first side plate (22);
the straight plate (21) is connected to the first side plate (22);
when the first side plate (22) is connected to the hydraulic supports (10), the straight plate (21) is located between two adjacent hydraulic supports (10) and shields a gap between the two adjacent hydraulic supports (10).
2. The inter-hydraulic-bracket protection device according to claim 1, characterized in that the straight plate (21) is perpendicular to the first side plate (22), and the width of the straight plate (21) is larger than the distance between two adjacent hydraulic brackets (10);
when the first side plate (22) is connected to the hydraulic support (10), the first side plate (22) is vertically arranged.
3. The inter-hydraulic-bracket protection device according to claim 1, characterized in that the length of the straight plate (21) is equal to the protection width of the hydraulic bracket (10) after deployment.
4. The inter-hydraulic-bracket protector according to claim 1, characterized by further comprising a second side plate (23), wherein the second side plate (23) is connected to the straight plate (21), and the straight plate (21) is located between the first side plate (22) and the second side plate (23).
5. The inter-hydraulic-bracket protection device according to claim 1, characterized in that the first side plate (22) is provided with a connecting structure, and the connecting structure is used for connecting the first side plate (22) with a hydraulic bracket (10).
6. The inter-hydraulic-bracket protector according to claim 5, characterized in that the connecting structure comprises a through hole (221) formed in the first side plate (22), and a screw is connected with the hydraulic bracket (10) after passing through the through hole (221).
7. The inter-hydraulic-bracket protector according to claim 5, characterized in that the connecting structure comprises a first lap plate connected to the first side plate (22) and forming a corner with the first side plate (22) for lapping on the top surface of the hydraulic bracket (10).
8. The inter-hydraulic-bracket protector as claimed in claim 7, wherein the connecting structure further comprises a second lap plate connected to the straight plate (21) and located on the same plane as the first lap plate for overlapping the top surface of the adjacent hydraulic bracket (10).
9. A support system comprising a plurality of hydraulic supports (10) in a linear array, and a plurality of inter-hydraulic support protectors (20) according to any one of claims 1 to 8;
the first side plate (22) is connected to the hydraulic supports (10), and the straight plate (21) is located between two adjacent hydraulic supports (10) and shields a gap between the two adjacent hydraulic supports (10).
10. The support system of claim 9, wherein the straight plate (21) is inclined downwardly in a forward to rearward direction of the hydraulic support (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010173211.0A CN111322102A (en) | 2020-03-12 | 2020-03-12 | Protection device and supporting system between hydraulic supports |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010173211.0A CN111322102A (en) | 2020-03-12 | 2020-03-12 | Protection device and supporting system between hydraulic supports |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111322102A true CN111322102A (en) | 2020-06-23 |
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ID=71173201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010173211.0A Pending CN111322102A (en) | 2020-03-12 | 2020-03-12 | Protection device and supporting system between hydraulic supports |
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| Country | Link |
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| CN (1) | CN111322102A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2530340A1 (en) * | 1974-11-23 | 1976-08-12 | Gullick Dobson Ltd | SELF-ADVANCING PIT REMOVAL FRAME |
| CN2732996Y (en) * | 2004-10-29 | 2005-10-12 | 开滦精煤股份有限公司范各庄矿业分公司 | Side guard plate for coal mining support |
| CN201588647U (en) * | 2010-01-26 | 2010-09-22 | 重庆大江工业有限责任公司 | Horizontal type end head support with safeguard structure for inclined top alley way |
| CN203412605U (en) * | 2013-07-05 | 2014-01-29 | 平顶山煤矿机械有限责任公司 | Hydraulic support with side protection plate |
| CN207144989U (en) * | 2017-09-21 | 2018-03-27 | 杨晓川 | The lateral anti-cash device of Full-mechanized mining working face ended support |
| CN207454008U (en) * | 2017-11-09 | 2018-06-05 | 神华集团有限责任公司 | A kind of hydraulic support waste rock blocking curtain |
-
2020
- 2020-03-12 CN CN202010173211.0A patent/CN111322102A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2530340A1 (en) * | 1974-11-23 | 1976-08-12 | Gullick Dobson Ltd | SELF-ADVANCING PIT REMOVAL FRAME |
| CN2732996Y (en) * | 2004-10-29 | 2005-10-12 | 开滦精煤股份有限公司范各庄矿业分公司 | Side guard plate for coal mining support |
| CN201588647U (en) * | 2010-01-26 | 2010-09-22 | 重庆大江工业有限责任公司 | Horizontal type end head support with safeguard structure for inclined top alley way |
| CN203412605U (en) * | 2013-07-05 | 2014-01-29 | 平顶山煤矿机械有限责任公司 | Hydraulic support with side protection plate |
| CN207144989U (en) * | 2017-09-21 | 2018-03-27 | 杨晓川 | The lateral anti-cash device of Full-mechanized mining working face ended support |
| CN207454008U (en) * | 2017-11-09 | 2018-06-05 | 神华集团有限责任公司 | A kind of hydraulic support waste rock blocking curtain |
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Application publication date: 20200623 |
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| RJ01 | Rejection of invention patent application after publication |