CN112593989B - Top beam length adjusting device and method of hydraulic support for caving coal and hydraulic support - Google Patents
Top beam length adjusting device and method of hydraulic support for caving coal and hydraulic support Download PDFInfo
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- CN112593989B CN112593989B CN202011444319.5A CN202011444319A CN112593989B CN 112593989 B CN112593989 B CN 112593989B CN 202011444319 A CN202011444319 A CN 202011444319A CN 112593989 B CN112593989 B CN 112593989B
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- 239000003245 coal Substances 0.000 title claims abstract description 140
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 abstract description 6
- 238000010168 coupling process Methods 0.000 abstract description 6
- 238000005859 coupling reaction Methods 0.000 abstract description 6
- 230000002159 abnormal effect Effects 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000005065 mining Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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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
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
- E21D23/06—Special mine caps or special tops of pit-props for permitting step-by-step movement
- E21D23/063—Retractable cantilever extensions therefor
-
- 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
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
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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
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
- E21D23/26—Hydraulic or pneumatic control
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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)
- Architecture (AREA)
- Structural Engineering (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Auxiliary Methods And Devices For Loading And Unloading (AREA)
Abstract
The application provides a top beam length adjusting device and method of a hydraulic support for caving coal and the hydraulic support, wherein a driving piece is used for driving a top beam extension piece to extend out or retract under the control of a controller so as to adjust the length of a top beam; the controller is used for acquiring the coal caving amount of the current hydraulic support, and controlling the driving piece to act according to the coal caving amount so as to extend or retract the top beam extension piece, wherein the length of the top beam is not constant but is determined according to the coal caving amount. According to the intelligent coupling coal caving and stress control method for the top coal caving hydraulic support, normal coal caving of the hydraulic support is guaranteed, the stress state is reasonable, abnormal working condition stress phenomena such as 'excessive coal caving', 'insufficient coal caving' or post-pulling stand columns are prevented, and the intelligent coupling of the coal caving state and stress control of the hydraulic support is achieved.
Description
Technical Field
The application relates to the technical field of coal mining, in particular to a top beam length adjusting device of a top coal caving hydraulic support, the top coal caving hydraulic support and a top beam length adjusting method of the top coal caving hydraulic support.
Background
In the related technology, the action position of the external force on the top beam is not easy to control, the hydraulic support is difficult to normally discharge coal, the stress state is unreasonable, and abnormal working conditions such as excessive coal discharge, insufficient coal discharge or post-pulling upright posts are stressed.
Disclosure of Invention
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the first aim at of this application provides a top beam length adjustment device of caving coal hydraulic support to solve the problem that the improper operating mode atress condition such as "excessive caving", "lack the caving coal" or pull out the back stand appears, realize the intelligent coupling of hydraulic support's caving coal state and stress control.
A second object of the present application is to propose a hydraulic support for caving coal.
The third purpose of the application is to provide a top beam length adjusting method of the hydraulic top coal caving support.
In order to achieve the above object, an embodiment of the first aspect of the present application provides a top beam length adjusting device of a hydraulic support for caving coal, the top beam length adjusting device is disposed at a tail end of a top beam of the hydraulic support, and the top beam length adjusting device includes: a drive member, a roof rail extension, and a controller; the driving piece is used for driving the top beam extending piece to extend or retract under the control of the controller so as to adjust the length of the top beam; and the controller is used for acquiring the coal discharging amount of the current hydraulic support and controlling the driving piece to act according to the coal discharging amount so as to extend or retract the top beam extension piece.
According to an embodiment of the present application, the cap length adjusting means further comprises: a guide rail; the guide rail is laid at the tail end of the top beam of the hydraulic support, and the top beam extension piece is driven by the driving piece to extend or retract along the guide rail.
According to one embodiment of the application, the roof rail extension surface is totally enclosed.
According to one embodiment of the application, the tail end of the top beam of the hydraulic support is provided with a receiving groove of a top beam extension piece; the roof rail extension extends from the receiving slot upon actuation of the actuating member and retracts into the receiving slot upon actuation of the actuating member.
According to one embodiment of the application, the groove depth of the accommodating groove is consistent with the stroke of the driving piece.
According to an embodiment of the application, the controller is further configured to drive the top beam extension to extend the length of the top beam if the coal caving amount is greater than or equal to a first threshold value and to drive the top beam extension to retract to restore the original length of the top beam if the coal caving amount is less than or equal to a second threshold value during the coal caving process.
According to an embodiment of the present application, the cap length adjusting means further comprises: the coal discharge amount detection assembly is connected with the controller; and the coal discharge amount detection assembly is used for detecting the coal discharge amount on the current hydraulic support.
In order to achieve the above object, a second aspect of the present application provides a hydraulic support for caving coal, comprising:
a support member, a top beam, a base, and the top beam length adjustment device set forth in the first aspect above;
wherein, the one end and the back timber of support piece are connected, and the other end is connected with the base, and support piece is used for supporting the back timber.
According to the hydraulic support for caving the top coal, the support piece is used for driving the support to extend out or retract under the control of the top beam so as to adjust the length of the support; a support member acting according to the cap to change a direction of the support member.
According to an embodiment of the application, the hydraulic support for caving coal further comprises:
the coal discharge amount detection assembly is connected with a controller in the top beam length adjusting device;
and the coal discharge amount detection assembly is used for detecting the coal discharge amount on the current hydraulic support.
In order to achieve the above object, a third aspect of the present invention provides a method for adjusting a top beam length of a hydraulic support for caving coal, which is suitable for a top beam length adjusting device, the method including:
acquiring the coal discharge amount of the current hydraulic support;
and according to the coal discharge amount, driving the top beam extension piece to extend or retract so as to adjust the length of the top beam.
In this application, the length of top coal caving hydraulic support's back timber is not invariable, but confirm according to the volume of putting coal, therefore, the length of solving the back timber can't stretch out the back timber or withdraw according to the volume of putting coal, lead to the not easily controlled problem of external force action position on the back timber, guarantee the normal caving of hydraulic support, the stress state is reasonable, prevent "excessive caving", "owe the caving" or pull out abnormal operating mode atress phenomena such as back stand, realize hydraulic support's the state of putting coal and the intelligent coupling of force control.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
FIG. 1 is a schematic diagram of the operation of a hydraulic support for caving coal;
FIG. 2 is a schematic structural diagram of a hydraulic support for caving coal according to an embodiment of the present application;
FIG. 3 is a schematic structural diagram of a top beam length adjusting device of the hydraulic top coal caving support;
FIG. 4 is a schematic view of the working state of the hydraulic support for caving coal;
FIG. 5 is a schematic view of the hydraulic support for caving coal in working condition;
FIG. 6 is a schematic view of the working state of the hydraulic support for caving coal;
FIG. 7 is a block diagram of a hydraulic support for caving coal according to another embodiment of the present application;
fig. 8 is a partial schematic view of a top beam length adjusting device of the hydraulic top coal caving bracket.
Detailed Description
Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The device and the method for adjusting the length of the top beam of the hydraulic support for caving coal and the hydraulic support are described below with reference to the accompanying drawings.
In the process of caving coal mining, because the coal breakage is too much, the coal breakage can cause larger pressure to the front of the top beam of the hydraulic support, so that the supporting gravity center of the top beam drifts to the front of the support, as shown in fig. 1, the position is drifted from a black dot to the position indicated by an arrow, at the moment, the back of the top beam of the hydraulic support is tilted, and the phenomenon of pulling out a rear upright post occurs. In addition, in the process of caving coal mining, the coal dropping speed is not fixed, and when a top plate coal discharging port is fixed, phenomena of excessive coal discharging, insufficient coal discharging and the like often occur.
In order to solve the above-mentioned problem that exists among the caving coal mining process, provided a device that carries out the regulation to the length of hydraulic support back timber in this application, can adjust back timber length through the device, and then can change the coal discharge mouth size, can avoid appearing "excessive coal discharge", "lack the coal discharge", pull out phenomenons such as back stand.
FIG. 2 is a schematic structural diagram of a hydraulic support for caving coal according to an embodiment of the present application. As shown in fig. 2, the cap length adjusting device 10 is provided at the rear end of the cap 20 of the hydraulic support 1. Fig. 3 is a partially enlarged view of the cap length adjusting means 10. As shown in fig. 3, the cap length adjusting means 10 includes: a drive member 11, a roof rail extension 12, and a controller 13 (not shown in fig. 3). And a driving member 11 for driving the extension or retraction of the roof rail extension 13 under the control of the controller 13 to adjust the length of the roof rail 20. And the controller 13 is used for acquiring the current coal discharge amount on the hydraulic support, and controlling the driving piece 11 to act according to the coal discharge amount so as to extend or retract the top beam extension piece 12.
In the subject embodiment, the drive member 11 is coupled to the header extension 12 and the controller 13, respectively. Alternatively, the driving member 11 may be a jack.
The drive member 11, under the control of the controller 13, may drive the header extension 12, and the header extension 12 may extend from the rear end of the header 20 when subjected to an outward driving force applied by the drive member 11. As shown in fig. 2.
Extension of the header extension 12 is commensurate with supplementing the length of the header 20, thereby lengthening the header. The canopy extension 12, when subjected to an inward driving force applied by the driving member 11, may be retracted to the rear end of the canopy 20, at which time the length of the canopy 20 is restored to its original length. In the coal caving process, when the coal caving amount of the hydraulic support 1 is large, the length of the top beam 20 can be prolonged in time through the top beam length adjusting device 10, and the change of the length of the top beam 20 enables the gravity center of the support not to drift, so that the occurrence of post-pulling is avoided.
Further, when the coal caving amount on the hydraulic support 1 is large, the top beam extension piece 12 is extended out in real time, the coal outlet space above the shield beam 30 is reduced, a top plate coal caving opening is reduced, the top coal caving amount is controlled, and intelligent adjustment of the coal caving state is achieved. As shown in fig. 4, when the length of the top beam 20 is increased, the coal discharge space above the shield plate 30 is reduced, and the coal discharge opening between the top beam 20 and the shield beam 30 is reduced, so that the top coal caving amount can be reduced.
The drive member 11, under the control of the controller 13, drives the canopy extension 12, and the canopy extension 12 retracts to the rear end of the canopy 20 when subjected to an inward driving force applied by the drive member 11. As shown in fig. 5.
When the current coal caving amount on the hydraulic support 1 is small, the top beam extension piece 12 is retracted immediately, the coal outlet space above the shield beam 30 is increased, the top plate coal caving opening is enlarged, the top coal caving amount is controlled, and the intelligent adjustment of the coal caving state is realized. As shown in fig. 6, when the length of the top beam 20 is shortened, the coal discharge space above the shield plate 30 is increased, and the coal discharge opening between the top plate 20 and the shield beam 30 is increased, so that the top coal caving amount can be increased.
In the embodiment of the present application, the controller 13 in the top beam length adjusting device 10 is further configured to drive the top beam extension 12 to extend the length of the top beam 20 if the coal caving amount is greater than or equal to a first threshold value, and drive the top beam extension 12 to retract to restore the original length of the top beam 20 if the coal caving amount is less than or equal to a second threshold value during the coal caving process.
In this embodiment, the length of the top beam 20 is not constant, but is determined according to the coal discharge amount, so as to ensure normal coal discharge of the hydraulic support, and the stress state is reasonable, thereby preventing the occurrence of abnormal working condition stress phenomena such as excessive coal discharge, insufficient coal discharge or post-pulling upright columns, and realizing intelligent coupling of the hydraulic support with the coal discharge state and stress control.
In this embodiment, the controller 13 is connected to the coal discharge amount detection assembly 14, and the coal discharge amount detection assembly 14 can detect a current coal discharge amount of the top beam 20 on the hydraulic support 1 and report the detected coal discharge amount to the controller 13, so that the controller 13 can adjust a retraction or extension state of the top beam extension 12 according to the coal discharge amount.
It should be noted that the coal discharge amount detecting assembly 14 may be a component of the top beam length adjusting device 10, or may be a component separate from the top beam length adjusting device 10. Alternatively, the coal discharge amount detecting assembly 14 may be disposed at a middle region of the lower surface of the top beam 20, and one or more coal discharge amount detecting assemblies 14 may be disposed at the middle region. As shown in fig. 7, the cap length adjusting device 10 further includes: a guide rail 15 (not shown in fig. 7) and a receiving groove 16. The specific structure of the guide rail 15 can be seen in fig. 8.
As shown in fig. 8, fig. 8 shows the guide rail 15 laid on the rear end of the hydraulic support header 20, and the header extension 12 is driven by the driving member 11 to perform an extending or retracting movement along the guide rail 15.
To achieve the above described embodiments, the header extension 12 is totally enclosed in its surface. On the one hand, the rigidity of the top beam extension piece 12 is increased, and the bearing performance of the top beam extension piece 12 is improved; on the other hand, to ensure smooth operation of the header extension 12. The surface of the top beam extension piece 12 is of an integral plate type structure, and the depth of a groove matched with a rib plate of the hydraulic support is consistent with the length of the top beam extension piece 12. I.e. in line with the stroke of the driver 11.
When the top beam extension 12 extends out completely, the surface opening position of the top beam extension 12 is positioned in the top beam 20, and the exposed surface of the top beam extension 12 is fully closed, so that coal leakage is prevented.
Optionally, the trailing end of the header 20 of the hydraulic support 1 is provided with a receiving slot 16 of the header extension 12. Header extension 12 extends from receiving channel 16 upon actuation of drive member 11 and retracts into receiving channel 16 upon actuation of drive member 11.
In order to achieve the above-described embodiment, the groove depth of the receiving groove 16 is kept consistent with the stroke of the driving member 11. That is, the depth of receiving channel 16 is consistent with the length of header extension 12.
Continuing with fig. 2, in order to implement the above embodiment, an embodiment of the present application further provides a hydraulic support for caving coal, including: a support member 40, a header 20, and a base 50, and the header length adjustment apparatus 10 described in the above embodiments. Wherein one end of the supporting member 40 is connected to the cap 20, and the other end is connected to the base 50, and the supporting member 40 is used for supporting the cap 20. Wherein the support 40 is a hydraulic jack.
In order to implement the above embodiment, the embodiment of the present application further provides a hydraulic support 1 for caving coal, including: a coal discharge amount detection assembly 14, wherein the coal discharge amount detection assembly 14 is connected with a controller 13 (not shown in fig. 2) in the top beam length adjusting device 10; the coal discharge amount detection assembly 14 is used for detecting the coal discharge amount on the current hydraulic support, namely, detecting the coal discharge amount on the top beam 20. That is, in the embodiment of the present application, the coal caving amount detecting assembly 14 is a detecting assembly independent of the roof beam length adjusting device 10, and is not integrated in the roof beam length adjusting device 10.
In order to implement the above embodiments, an embodiment of the present application further provides a top beam length adjusting method for a hydraulic top coal caving support, which is applicable to any top beam length adjusting device, and the method includes: acquiring the coal discharging amount of the current hydraulic support 1; the roof rail extension 12 is driven to extend or retract according to the amount of the retrieved coal discharge to adjust the length of the roof rail 20.
As shown in fig. 4 and 6, the movement of the top beam length adjusting device 10 simultaneously drives the change of the included angle between the top beam length adjusting device and the shield plate 30, so as to change the size of the coal discharge opening and simultaneously adjust the stress action point. Therefore, the unstable stress state of the coal and the bracket can be promoted, the coal blocks can be crushed, the normal coal discharge of the hydraulic bracket is ensured, the stress state is reasonable, the abnormal working condition stress phenomena of 'excessive coal discharge', 'insufficient coal discharge' or pulled upright columns and the like are prevented, and the intelligent coupling of the coal discharge state and the stress control of the hydraulic bracket is realized.
It should be noted that the foregoing explanation of the control device for controlling the length of the top beam in the embodiment also applies to the control method for the length of the top beam in this embodiment, and details are not described here.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (9)
1. The utility model provides a top beam length adjustment device of caving coal hydraulic support which characterized in that, top beam length adjustment device set up the tail end at the hydraulic support top beam, top beam length adjustment device includes:
a drive member, a roof rail extension, and a controller;
the driving piece is used for driving the top beam extension piece to extend or retract under the control of the controller so as to adjust the length of the top beam;
the controller is used for obtaining the current coal discharge amount on the hydraulic support, and controlling the action of the driving piece according to the coal discharge amount so as to stretch out or withdraw the top beam extension piece, wherein the tail end of the top beam of the hydraulic support is provided with the accommodating groove of the top beam extension piece, and the top beam extension piece is driven by the driving piece to stretch out from the accommodating groove and is driven by the driving piece to withdraw the accommodating groove.
2. The header length adjustment apparatus of claim 1, further comprising: a guide rail;
the guide rail is laid at the tail end of the top beam of the hydraulic support, and the top beam extension piece is driven by the driving piece to extend or retract along the guide rail.
3. The header length adjustment apparatus of claim 1, wherein the header extension surface is totally enclosed.
4. The cap length adjusting device as claimed in claim 1, wherein the depth of the receiving groove is consistent with the stroke of the driving member.
5. The top beam length adjusting apparatus as claimed in any one of claims 1 to 3, wherein the controller drives the top beam extension to extend the length of the top beam if the coal caving amount is greater than or equal to a first threshold value and drives the top beam extension to retract to restore the original length of the top beam if the coal caving amount is less than or equal to a second threshold value during the coal caving process.
6. The cap length adjustment device according to claim 5, further comprising:
the coal discharge amount detection assembly is connected with the controller;
the coal discharge amount detection assembly is used for detecting the current coal discharge amount on the top beam.
7. A hydraulic prop for caving coal, comprising:
-a support, a roof rail and a base, and a roof rail length adjustment device according to any of claims 1-6;
one end of the support is connected with the top beam, the other end of the support is connected with the base, and the support is used for supporting the top beam.
8. The hydraulic prop for caving coal as claimed in claim 7, further comprising:
the coal discharge amount detection assembly is connected with a controller in the top beam length adjusting device;
the coal discharge amount detection assembly is used for detecting the coal discharge amount on the current hydraulic support.
9. A method for adjusting the length of a top beam of a hydraulic caving coal support, which is applied to the top beam length adjusting device according to any one of claims 1 to 6, and comprises the following steps:
acquiring the coal discharge amount of the current hydraulic support;
and driving the top beam extension piece to extend or retract according to the coal discharge amount so as to adjust the length of the top beam.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011444319.5A CN112593989B (en) | 2020-12-08 | 2020-12-08 | Top beam length adjusting device and method of hydraulic support for caving coal and hydraulic support |
| AU2021282457A AU2021282457B2 (en) | 2020-12-08 | 2021-12-08 | Apparatus and method for adjusting length of canopy of hydraulic roof support for top coal caving, and hydraulic roof support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011444319.5A CN112593989B (en) | 2020-12-08 | 2020-12-08 | Top beam length adjusting device and method of hydraulic support for caving coal and hydraulic support |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112593989A CN112593989A (en) | 2021-04-02 |
| CN112593989B true CN112593989B (en) | 2022-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011444319.5A Active CN112593989B (en) | 2020-12-08 | 2020-12-08 | Top beam length adjusting device and method of hydraulic support for caving coal and hydraulic support |
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| Country | Link |
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| CN (1) | CN112593989B (en) |
| AU (1) | AU2021282457B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112378390B (en) * | 2021-01-12 | 2021-05-25 | 北京龙软科技股份有限公司 | Fully-mechanized coal mining face measuring robot device and automatic measuring system |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2096680A (en) * | 1981-04-09 | 1982-10-20 | Uholne A Lignitove Bane Koncer | A mine roof support unit with a gate in the goaf shield |
| CN2078373U (en) * | 1990-01-08 | 1991-06-05 | 中国矿业大学北京研究生部 | Telescopic type coal pit prop with relaxing and proping-up sliding top-beam |
| DE4016929C1 (en) * | 1990-05-25 | 1991-09-26 | Hermann Hemscheidt Maschinenfabrik Gmbh & Co., 5600 Wuppertal, De | Roof support for mine - has canopy with bar hinged to floor skids by extendable props |
| DE19814246A1 (en) * | 1998-03-31 | 1999-10-07 | Saartech Ges Fuer Ind Und Berg | Coal face shield structure with a take-off opening |
| CN1279340A (en) * | 1999-06-30 | 2001-01-10 | 萨尔技术股份有限公司 | Shield supports for having influence on edge of roof caving |
| PL369417A1 (en) * | 2003-09-05 | 2005-03-07 | Hornonitrianske Bane Prievidza | Section of mechanized lining, particularly designed for breast working exploitation |
| CN1786420A (en) * | 2004-12-10 | 2006-06-14 | 兖州煤业股份有限公司 | Electric hydraulic controlled caving coal method and it hydraulic supporter |
| CN102900450A (en) * | 2012-09-05 | 2013-01-30 | 山东科技大学 | Caving coal hydraulic support with large swing beam structure |
| CN203008938U (en) * | 2012-11-14 | 2013-06-19 | 三一重型装备有限公司 | Tail beam structure of top coal caving hydraulic bracket and top coal caving hydraulic bracket |
| CN105134274A (en) * | 2015-09-29 | 2015-12-09 | 天地科技股份有限公司 | Double-column top coal caving hydraulic support having large mining height and provided with three-stage top coal recovery devices |
| CN209942861U (en) * | 2019-04-23 | 2020-01-14 | 云南省后所煤矿 | Sliding block type hydraulic support |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4065929A (en) * | 1976-03-08 | 1978-01-03 | Atlantic Richfield Company | Mine roof support and method in longwall mining of thick mineral seams |
| CN102720499B (en) * | 2012-06-29 | 2014-10-29 | 中国矿业大学 | Fully-mechanized top-coal caving, filling and mining method |
-
2020
- 2020-12-08 CN CN202011444319.5A patent/CN112593989B/en active Active
-
2021
- 2021-12-08 AU AU2021282457A patent/AU2021282457B2/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2096680A (en) * | 1981-04-09 | 1982-10-20 | Uholne A Lignitove Bane Koncer | A mine roof support unit with a gate in the goaf shield |
| CN2078373U (en) * | 1990-01-08 | 1991-06-05 | 中国矿业大学北京研究生部 | Telescopic type coal pit prop with relaxing and proping-up sliding top-beam |
| DE4016929C1 (en) * | 1990-05-25 | 1991-09-26 | Hermann Hemscheidt Maschinenfabrik Gmbh & Co., 5600 Wuppertal, De | Roof support for mine - has canopy with bar hinged to floor skids by extendable props |
| DE19814246A1 (en) * | 1998-03-31 | 1999-10-07 | Saartech Ges Fuer Ind Und Berg | Coal face shield structure with a take-off opening |
| CN1279340A (en) * | 1999-06-30 | 2001-01-10 | 萨尔技术股份有限公司 | Shield supports for having influence on edge of roof caving |
| PL369417A1 (en) * | 2003-09-05 | 2005-03-07 | Hornonitrianske Bane Prievidza | Section of mechanized lining, particularly designed for breast working exploitation |
| CN1786420A (en) * | 2004-12-10 | 2006-06-14 | 兖州煤业股份有限公司 | Electric hydraulic controlled caving coal method and it hydraulic supporter |
| CN102900450A (en) * | 2012-09-05 | 2013-01-30 | 山东科技大学 | Caving coal hydraulic support with large swing beam structure |
| CN203008938U (en) * | 2012-11-14 | 2013-06-19 | 三一重型装备有限公司 | Tail beam structure of top coal caving hydraulic bracket and top coal caving hydraulic bracket |
| CN105134274A (en) * | 2015-09-29 | 2015-12-09 | 天地科技股份有限公司 | Double-column top coal caving hydraulic support having large mining height and provided with three-stage top coal recovery devices |
| CN209942861U (en) * | 2019-04-23 | 2020-01-14 | 云南省后所煤矿 | Sliding block type hydraulic support |
Non-Patent Citations (3)
| Title |
|---|
| 翟国栋等.新型轻型低位放顶煤液压支架的研制.《煤》.2000,(第04期),第17-18页. * |
| 苏林军等.放顶煤液压支架的创新与发展.《煤炭科学技术》.2011,(第04期),第84-88页. * |
| 马英.综放工作面自动化放顶煤系统研究.《煤炭科学技术》.2013,(第11期),第22-24页. * |
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| AU2021282457B2 (en) | 2023-02-16 |
| AU2021282457A1 (en) | 2022-06-23 |
| CN112593989A (en) | 2021-04-02 |
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