CN111365053A - Self-adaptive roof-cutting roadway temporary waste rock blocking device - Google Patents
Self-adaptive roof-cutting roadway temporary waste rock blocking device Download PDFInfo
- Publication number
- CN111365053A CN111365053A CN202010198910.0A CN202010198910A CN111365053A CN 111365053 A CN111365053 A CN 111365053A CN 202010198910 A CN202010198910 A CN 202010198910A CN 111365053 A CN111365053 A CN 111365053A
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- China
- Prior art keywords
- waste rock
- roadway
- rock blocking
- balance car
- blocking plate
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
- 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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- 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
- 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
Abstract
The invention provides a self-adaptive roof cutting and roadway forming temporary waste rock blocking device which is arranged behind a hydraulic support and comprises a plurality of flexibly connected balance cars, a plurality of supporting top beams corresponding to the top of a roadway, a plurality of rear-layer waste rock blocking plates corresponding to the side parts of the roadway and a plurality of front-layer waste rock blocking plates, wherein each top part of each balance car is provided with two single hydraulic supports, the top parts of each two single hydraulic supports are provided with one supporting top beam, the side part of each balance car is vertically and fixedly provided with one rear-layer waste rock blocking plate, the front-layer waste rock blocking plate is vertically arranged on the rear-layer waste rock blocking plate through an elastic assembly, and the bottom part of each balance car is provided with a plurality of universal wheels. The single hydraulic prop on the balance car can adjust the state along with the work of the front hydraulic support to adjust the supporting top beam for supporting the top of the roadway, and temporarily support the roadway, so that the roof collapse caused by unstable stress of the roadway roof when the goaf is just formed is prevented, and the safety factor of the roadway is improved.
Description
Technical Field
The invention relates to the technical field of roadway support in a 110 construction method, in particular to a self-adaptive roof-cutting roadway temporary waste rock blocking device.
Background
In the roof cutting pressure relief coal pillar-free self-entry process, as the gob-side entry side of the gob-side entry is automatically formed by goaf caving gangue through goaf overlying rock compaction, if no support is arranged beside the roadway in the forming process of the broken stone side, the caving broken stones tend to rush into the entry, thereby endangering the stability and personal safety of the gob-side entry and further causing more serious lane accidents. The temporary waste rock blocking device is set to be an important method for protecting the roadway, the manual setting of the waste rock blocking device is not only tedious, large in labor capacity and very dangerous, but also consumes a large amount of manpower and material resources due to the fact that the roadway top and bottom plate is rugged, and therefore the research on the temporary waste rock blocking device which can automatically adapt to the roadway with different heights and can timely support the gob-side roadway top and bottom plate has important significance for wide popularization and application of the roof cutting and pressure relief coal-pillar-free self-tunneling technology.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a self-adaptive roof-cutting roadway temporary waste rock blocking device which is directly connected with a working face end support, self walking is realized along with the advancing of the end support, the waste rock blocking device does not need to be manually arranged, waste rock blocking and roadway top and bottom plate supporting can be timely carried out, the roadway height can be automatically adapted, and the collapse degree of waste rock in a goaf behind the device can be observed through crushed stone.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a self-adaptation becomes interim waste rock blocking device in lane of cutting top, sets up the rear at hydraulic support, including the balance car of the soft connection of a plurality of, with a plurality of supporting back timber corresponding in tunnel top, with a plurality of back strata waste rock blocking plate and a plurality of front strata waste rock blocking plate corresponding in tunnel lateral part, every balance car top is provided with two hydraulic prop, the top of every two hydraulic prop sets up one and supports the back timber, the vertical fixed back strata waste rock blocking plate that sets up of lateral part of every balance car, the back strata waste rock blocking plate on the first balance car links to each other with hydraulic support, the front strata waste rock blocking plate passes through the vertical setting of elastic component on the back strata waste rock blocking plate, the bottom of every balance car is provided with a plurality of universal wheels.
Preferably, the elastic component comprises a supporting plate arranged on the rear waste rock blocking plate, a guide hole which is vertically arranged on the front waste rock blocking plate and has a through bottom, and a guide post which can vertically move on the guide hole, wherein the guide hole is formed in the front waste rock blocking plate, the bottom of the guide post is connected with the supporting plate, a spring is sleeved outside the guide post, and the spring is positioned between the bottom of the front waste rock blocking plate and the supporting plate.
Preferably, a rear observation window is vertically arranged on the rear gangue blocking plate, and a front observation window matched with the rear observation window is vertically arranged on the front gangue blocking plate.
Preferably, the front observation window is provided with an observation hole corresponding to the rear observation window.
Preferably, two adjacent rear-layer gangue blocking plates are connected through a plurality of shackles.
(III) advantageous effects
The invention provides a self-adaptive roof-cutting roadway temporary waste rock blocking device. The method has the following beneficial effects:
1. this interim waste rock blocking device of self-adaptation topping roadway, along with the walking of the advance of end hydraulic support, the monomer hydraulic prop on the balance car can be along with the work of the hydraulic support in the place ahead and the adjustment is strutted the back timber and is used for supporting the tunnel top, carries out interim support to the tunnel, prevents to cause the roof to collapse because of the unstable roof atress of tunnel when the collecting space area just formed, avoids the collecting space area collapse waste rock to pour into the tunnel, provides safe working space for the staff, has improved the factor of safety in tunnel. Meanwhile, waste rock blocking can be achieved for the side portion of the roadway, when the rear-layer waste rock blocking plate meets the requirement of roadway height, the front-layer waste rock blocking plate is in a state of being parallel to and level with the rear-layer waste rock blocking plate due to the height of the top of the roadway, the elastic assembly below the front-layer waste rock blocking plate is in a state of being tightly compressed, when the roadway height becomes high, the rear-layer waste rock blocking plate cannot meet the height, the elastic assembly can bounce the front-layer waste rock blocking plate by the corresponding height, and therefore full-height waste rock blocking is achieved.
2. This interim waste rock blocking device in lane is surely carried out to self-adaptation, when lateral part waste rock blocking, can see through the waste rock whereabouts condition in observation hole observation rear collecting space area at any time to because the existence of back observation window, prevented again that small-size waste rock from penetrating into the tunnel through the observation hole, prevent to endanger workman's in the tunnel personal safety.
Drawings
FIG. 1 is a schematic illustration of a single hydraulic prop according to the present invention;
FIG. 2 is a schematic view of a rear gangue blocking plate according to the invention;
FIG. 3 is a schematic view of the viewing window of the present invention;
FIG. 4 is a supporting state diagram of the supporting top beam and the front layer gangue blocking plate of the invention.
In the figure: the device comprises a hydraulic support 2, a balance car 3, a single hydraulic prop 4, a supporting top beam 5, a rear gangue blocking plate 6, a front gangue blocking plate 7, a supporting plate 8, a guide post 9, a guide hole 10, a spring 11, a universal wheel 12, a rear observation window 13, a front observation window 14, an observation hole 15, a shackle 16 and a roadway 17.
Detailed Description
The embodiment of the invention provides a self-adaptive roof-cutting roadway-forming temporary waste rock blocking device which is arranged behind a hydraulic support 2 as shown in figures 1-4. The hydraulic support 2 is prior art. The hydraulic support 2 uses high-pressure liquid of an emulsion pump station as power, and the upright posts and various jacks are actuated through a hydraulic control system, so that basic operation procedures such as post descending, frame moving, post lifting, pushing sliding and the like are realized. The forward hydraulic mount is not the center of gravity of the present case.
The device comprises a plurality of flexibly connected balance cars 3, a plurality of supporting top beams 5 corresponding to the top of a roadway 17, a plurality of rear-layer waste rock blocking plates 6 corresponding to the side of the roadway 17 and a plurality of front-layer waste rock blocking plates 7, wherein a plurality of universal wheels 12 are arranged at the bottom of each balance car 3, and the universal wheels 12 are arranged at the bottom of each balance car to drive the whole device to move forwards. Each balance car 3 is 1m long, and the balance cars 3 can be connected in a flexible connection mode through springs, chains, ropes, hinges and the like. The purpose is to adapt to the rugged road condition in the tunnel, and the condition that the front is high and the back is low is unlikely to happen, and the rear gangue blocking plate 6 on the first balance car 3 is connected with the front hydraulic support 2 and can move along with the forward movement of the hydraulic support 2.
Two single hydraulic props 4 are vertically arranged at the top of each balance car 3, and a supporting top beam 5 is arranged at the top of each two single hydraulic props 4.
The balance car 3 is provided with a PLC controller, the top of each supporting top beam 5 is provided with a strain gauge, the strain gauge is in the prior art and is of the type ANTHONE-LU-THG. The PLC is connected with the single hydraulic prop 4 and the strain gauge. The strain gauge is set to a fixed value, when the upper pressure reaches the fixed value, the PLC controls the single hydraulic prop 4 on the balance car 3 not to rise any more, and the fixed value can also ensure that the balance car 3 below cannot be damaged due to the overlarge upper pressure. The PCL controller controls the single hydraulic prop 4 through the pressure value sensed by the strain gauge, and the program of the PCL controller is not the center of gravity of the scheme.
The lifting of each single hydraulic prop 4 can be automatically adjusted along with the lifting of the hydraulic support 2. And because the single hydraulic prop 4 follows the action of the hydraulic support 2, when the top of the front hydraulic support 2 reaches the top height of the roadway 17 in the coal mining process, the top of the single hydraulic prop 4 on the rear balancing device can be contacted with the top of the roadway 17, and as the large support top beam 5 is arranged above the single hydraulic prop 4 on each balance car 3 and is contacted with the top of the roadway 17, the temporary support effect can be realized, and at the moment, the whole device is stressed in the vertical direction and is tightly contacted with the top of the roadway 17, so that the gangue blocking plate can be prevented from inclining and toppling.
The curve of the supporting force of the supporting top beam 5 with respect to time, called the operating characteristic curve of the supporting top beam 5, can be divided into three stages: initial support stage, resistance increasing stage and constant resistance stage.
And (3) a primary support stage:
in the process of lifting the support, when the supporting top beam 5 is in contact with the roadway 17, the liquid pressure of the upright post piston cavity of the single hydraulic prop 4 reaches the working pressure of a pump station, liquid supply is stopped, the one-way valve is locked, and the stage is called as the initial support stage of the support. At this time, the supporting force of the supporting top beam 5 on the roadway 17 is called initial supporting force.
The initial supporting force of the supporting top beam 5 is related to the working pressure of a pump station, the number of stand columns, the inner diameter of a cylinder and the type of the frame, and different supporting efficiencies of the type of the frame are different and mainly depend on the inclination degree of the single hydraulic prop 4 and the like.
And a resistance increasing stage:
after the supporting top beam 5 is initially supported, along with the sinking of the supporting top beam 5, the closed liquid in the piston cavity of the single hydraulic prop 4 is pressurized and hydraulically lifted to present a bearing resistance increasing state, and the stage of starting the safety valve is called a resistance increasing stage. At this time, the cylinder diameter of the loaded upright column is slightly increased, the liquid is compressed, the volume is slightly reduced, the total length of the upright column is shortened, the upright column is still recovered to the original length after unloading, and the shortening amount is called elastic contractible amount. Within the strength tolerance, the amount of resilient compressibility of the stud is limited, with smaller being more beneficial for roof management.
A constant resistance stage:
after the supporting top beam 5 is loaded, as the pressure of the roadway 17 continues to increase, when the pressure of the lower cavity of the single hydraulic prop 4 exceeds the safety valve pressure adjusting value of the support, the safety valve is opened to overflow, the stand column contracts downwards, the pressure of the supporting top beam 5 is reduced, the pressure of the lower cavity of the stand column is reduced, when the pressure of the lower cavity of the stand column is lower than the safety valve pressure adjusting value, the safety valve stops overflowing, so that under the limitation of the safety valve adjusting pressure, a pressure curve changes in a wave shape, the stage is a constant resistance stage, and the maximum load borne by the supporting top beam.
A rear-layer waste rock blocking plate 6 is vertically and fixedly arranged on the side portion of each balance car 3, and a front-layer waste rock blocking plate 7 is vertically arranged on the rear-layer waste rock blocking plate 6 through an elastic assembly. The upper corners and the lower corners of the front ends of the rear layer waste rock blocking plate 6 and the front layer waste rock blocking plate 7 are rounded corners, so that the waste rock blocking plates are prevented from being clamped when encountering rough terrain and cannot advance.
The elastic component comprises a supporting plate 8 arranged on the back-layer waste rock blocking plate 6, a guide hole 10 vertically arranged on the front-layer waste rock blocking plate 7 and communicated with the bottom of the front-layer waste rock blocking plate, and a guide column 9 capable of vertically moving on the guide hole 10, wherein the bottom end of the guide column 9 is connected with the supporting plate 8, a spring 11 is sleeved outside the guide column 9, and the spring 11 is positioned between the bottom of the front-layer waste rock blocking plate 7 and the supporting plate 8. The elastic component has the function of enabling the front layer gangue blocking plate 7 to freely move up and down.
A rear observation window 13 is vertically arranged on the rear layer waste rock blocking plate 6, and a front observation window 14 matched with the rear observation window 13 is vertically arranged on the front layer waste rock blocking plate 7. The rear viewing window 13 and the front viewing window 14 are both wire mesh.
The front observation window 14 is provided with an observation hole 15 corresponding to the rear observation window 13. The purpose is that when the front gangue blocking plate 7 moves up and down, the falling degree of the rock at the rear part can be observed through the observation hole 15.
Two adjacent rear gangue blocking plates 6 are connected through a plurality of shackles 16. Shackle 16 is commercially available in the prior art.
The working principle is as follows: as shown in fig. 4, when the front hydraulic support 2 moves forward, the whole device is driven to move forward, the single hydraulic prop 4 on the balance car 3 can adjust the supporting top beam 5 along with the work of the front hydraulic support 2 to support the top of the roadway 17 and temporarily support the roadway 17, and due to stress, the whole device can well prevent the gangue blocking plate from inclining and toppling due to the impact of gangue in the goaf. When back layer waste rock blocking plate 6 satisfies the high requirement of tunnel 17, then front layer waste rock blocking plate 7 is in the state with back layer waste rock blocking plate 6 parallel and level because tunnel 17 top height, and below elastic component is in the state of tight compression at this moment, highly uprises when tunnel 17, and when back layer waste rock blocking plate 6 highly can't satisfy, elastic component can bounce front layer waste rock blocking plate 7 corresponding height to this reaches full-height waste rock blocking.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a temporary waste rock blocking device in lane is surely carried out to self-adaptation top, sets up the rear at hydraulic support (2), its characterized in that: balance car (3) including the soft connection of a plurality of, with corresponding a plurality of back horizon waste rock baffle (6) and a plurality of front strata waste rock baffle (7) in tunnel (17) top, every balance car (3) top is provided with two hydraulic prop (4), the top of every two hydraulic prop (4) sets up one and struts back timber (5), the vertical fixed back horizon waste rock baffle (6) that sets up of lateral part of every balance car (3), back strata waste rock baffle (6) on first balance car (3) link to each other with hydraulic support (2), front strata waste rock baffle (7) are through the vertical setting of elastic component on back strata waste rock baffle (6), the bottom of every balance car (3) is provided with a plurality of universal wheels (12).
2. The device of claim 1, which is characterized in that: elastic component including setting up backup pad (8) on back layer waste rock baffle (6), vertical guide post (9) of seting up on front floor waste rock baffle (7) and the guiding hole (10) that the bottom link up and can go up vertical activity in guiding hole (10), the bottom of guide post (9) links to each other with backup pad (8), guide post (9) overcoat has spring (11), spring (11) are located between bottom and backup pad (8) of front floor waste rock baffle (7).
3. The device of claim 2, wherein the device comprises: a rear observation window (13) is vertically arranged on the rear waste rock blocking plate (6), and a front observation window (14) matched with the rear observation window (13) is vertically arranged on the front waste rock blocking plate (7).
4. The device of claim 3, wherein the device comprises: the front observation window (14) is provided with an observation hole (15) corresponding to the rear observation window (13).
5. The device for stopping the gangue adaptively in the roof-cutting roadway according to any one of claims 1 to 4, wherein: two adjacent rear gangue blocking plates (6) are connected through a plurality of shackles (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010198910.0A CN111365053A (en) | 2020-03-20 | 2020-03-20 | Self-adaptive roof-cutting roadway temporary waste rock blocking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010198910.0A CN111365053A (en) | 2020-03-20 | 2020-03-20 | Self-adaptive roof-cutting roadway temporary waste rock blocking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111365053A true CN111365053A (en) | 2020-07-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010198910.0A Withdrawn CN111365053A (en) | 2020-03-20 | 2020-03-20 | Self-adaptive roof-cutting roadway temporary waste rock blocking device |
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| Country | Link |
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| CN (1) | CN111365053A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117738713A (en) * | 2024-02-21 | 2024-03-22 | 中国矿业大学(北京) | Gangue blocking structure, device and method suitable for roof cutting and pressure relief automatic roadway forming |
-
2020
- 2020-03-20 CN CN202010198910.0A patent/CN111365053A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117738713A (en) * | 2024-02-21 | 2024-03-22 | 中国矿业大学(北京) | Gangue blocking structure, device and method suitable for roof cutting and pressure relief automatic roadway forming |
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Application publication date: 20200703 |