CN111878139A - Contractible water bag supporting leg and water bag unloading type anti-impact support - Google Patents
Contractible water bag supporting leg and water bag unloading type anti-impact support Download PDFInfo
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- CN111878139A CN111878139A CN202010784660.9A CN202010784660A CN111878139A CN 111878139 A CN111878139 A CN 111878139A CN 202010784660 A CN202010784660 A CN 202010784660A CN 111878139 A CN111878139 A CN 111878139A
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- Prior art keywords
- leg
- water
- bladder
- legs
- supporting
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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
- E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
- E21D23/0013—Frame type supports
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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
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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
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
Abstract
A contractible water bag supporting leg and a water bag unloading type anti-impact support belong to the field of coal mine roadway support, can keep the support bearing capacity and ensure the safety and integrity in the roadway space under the impact condition; the supporting leg can be quickly unloaded and contracted according to the same operation when impact occurs again, and long-term cyclic utilization is realized; the legs have an inner cavity for receiving the bladder, which is disposed in the inner cavity and which expands the legs outside the inner cavity to form the bulb.
Description
Technical Field
The invention belongs to the field of coal mine roadway support, and particularly relates to a retractable water bag supporting leg and a water bag unloading type anti-impact support.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The rock burst is one of the most serious dynamic disasters of a coal mine, and has great destructiveness, and generally has no macroscopic sign before the rock burst occurs, and the rock mass is thrown out in a sudden, sharp and violent mode, so that the support damage and the roadway blockage can be caused, and constructors can be injured by crashing and even suffocated to death due to the roadway blockage. Along with the increase of coal mining depth and the continuous expansion of mining intensity, the destruction degree of rock burst is more and more prominent.
The roadway has the advantages that the deformation speed of the roadway is high after the rock burst happens, the deformation pressure is not enough to be borne by a common supporting structure, the anti-impact supporting idea is to ensure that the contractible deformation is quickly realized under the condition that the bearing capacity of the supporting structure is not reduced, the space of the roadway is reserved, and the escape rescue or the use requirement is continuously met. The inventor finds that the existing anti-impact support utilizes an energy-absorbing material or a structure to sacrifice self plastic strain energy to realize rapid abdication, can meet the requirement of single rock burst, can not resist the rock burst again for the energy-absorbing material or the structure which sacrifices the self structure because the rock burst can frequently occur for many times, and has poor recycling effect when the energy-absorbing material or the structure which needs to be replaced is used next time; meanwhile, the factors of large weight, inconvenient movement and the like of the conventional anti-impact support are considered, and if the damaged energy-absorbing material or structure is replaced, a large amount of time, manpower and financial resources are consumed, and the workload is increased unnecessarily.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a retractable water bag supporting leg and a water bag unloading type anti-impact support, which can keep the supporting bearing capacity and ensure the safety and integrity in the roadway space under the impact condition; meanwhile, when impact occurs again, the requirement that the unloading can be quickly reduced according to the same operation is still met, and long-term cyclic utilization is realized.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, the technical scheme of the invention provides a retractable water bag supporting leg which comprises a supporting leg, supporting steel plates and a bag body filled with liquid, wherein the bag body is fixed at the bottom of the supporting leg, the periphery of the bottom of the supporting leg is also connected with the supporting steel plates, the bag body is provided with a water injection hole and a water drainage hole, and the water drainage hole is connected with a safety valve; the legs have an inner cavity for receiving the bladder, which is disposed in the inner cavity and which expands the legs outside the inner cavity to form the bulb.
As a further technical scheme, the water injection hole is provided with a one-way valve, and the water drainage hole is provided with a safety valve.
As a further technical scheme, a cover body used for preventing deflection is arranged at the joint of the expansion part and the main body of the supporting leg.
In a second aspect, the technical scheme of the invention also provides a water bag unloading type anti-impact support which comprises a top beam, fiber bag bodies, shed legs and grid supporting plates, wherein two ends of the top beam are respectively connected with one or more shed legs, the fiber bag bodies are arranged on the outer sides of the shed legs in a clinging mode, and the grid supporting plates are arranged in the areas between the shed legs on the two sides.
As a further technical scheme, the top beam comprises a first sub top beam and a second sub top beam which are hinged with each other, the bottom end of the first sub top beam is hinged with a first shed leg, and the bottom end of the second sub top beam is hinged with a second shed leg.
As a further technical scheme, the fiber bag body is arranged between the shed legs and the hole wall.
As a further technical scheme, the fiber bag body is provided with a water injection port and a water discharge port, the water injection port is provided with a one-way valve, and the water discharge port is provided with a safety valve.
The technical scheme of the invention has the following beneficial effects:
1) the characteristics that water pocket unloading formula scour protection support had can effectively solve current scour protection support weight big, remove inconvenient, perhaps the problem that contractible part reuse effect is poor, can guarantee safe complete in the tunnel space under the impact condition, assurance equipment and personnel's safety.
2) The design of the retractable water sac supporting legs can be quickly unloaded and retracted when rock burst occurs, meanwhile, the supporting bearing capacity is kept, the support is prevented from collapsing and being damaged due to the impact action, and the water sac can be replaced by other materials capable of being quickly and constantly compressed.
3) Adopt water pocket formula scour protection support of unloading, receive impact ground pressure when the tunnel after, can be to the water injection once more in the utricule, make it still can play the scour protection effect, guarantee the reuse of contractible part, realize long-term cyclic use, reduced workman intensity of labour, saved the input cost of strutting simultaneously.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Figure 1 is an overall schematic view of the present invention according to one or more embodiments,
figure 2 is a schematic illustration of a collapsible bladder leg resting state according to one or more embodiments of the present invention,
figure 3 is a schematic illustration of a collapsible bladder leg of the present invention in a collapsed state according to one or more embodiments,
figure 4 is a water fill and bleed hole distribution diagram for a first bladder according to one or more embodiments of the present invention,
FIG. 5 is a schematic view of a support steel plate according to one or more embodiments of the present invention.
In the figure: 1-top hinge, 2-top beam, 3-upper hinge, 4-fiber bag body, 5-water injection nozzle, 6-deviation prevention cover, 7-contractible water bag supporting leg, 8-shed leg, 9-grid supporting plate, 10-supporting steel plate, 11-first bag body, 12-safety valve, 13-bottom backing plate, 14-water drainage hole, 15-water injection hole, 16-expansion part and 17-one-way valve.
The spacing or dimensions between each other are exaggerated to show the location of the various parts, and the illustration is for illustrative purposes only.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
Term interpretation section: the terms "mounted," "connected," "fixed," and the like in the present invention are to be understood in a broad sense, and for example, the terms "mounted," "connected," and "fixed" may be fixed, detachable, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.
As described in the background of the invention, the above-mentioned deficiencies of the prior art are addressed, and in order to solve the above-mentioned problems, the present invention provides a retractable water bag leg and a water bag unloading type anti-impact support.
Example 1
In an exemplary embodiment of the present invention, as shown in fig. 1, the present embodiment provides a retractable leg of a first bag body 11, which comprises a leg, supporting steel plates 10 and a first bag body 11 filled with liquid, wherein the first bag body 11 is fixed at the bottom of the leg, the periphery of the bottom of the leg is further connected with a plurality of supporting steel plates 10, the first bag body 11 is provided with a water filling hole 15 and a water draining hole 14, and the water draining hole 14 is connected with a safety valve 12; the legs have a lumen for receiving the first bladder 11, the first bladder 11 being disposed in the lumen and expanding the legs outside the lumen to form the bulb 16.
The first capsule body 11 used in the embodiment is a fiber first capsule body 11, one side of the bottom of the fiber first capsule body 11 is provided with a water injection hole 15, and the front end of the water injection hole 15 is connected with a one-way valve, so that water cannot reversely flow out of the water injection hole 15 after the water injection is finished; the first capsule 11 has good tensile toughness and tightly wraps the water injected therein, so that the first capsule 11 has good elasticity and retractility. Under the action of the static load pressure of the surrounding rock of the roadway, the supporting legs contract slowly at constant resistance, so that the support is guaranteed to exert constant supporting resistance on the surrounding rock, and elastic energy in the surrounding rock is released slowly, and the support is guaranteed not to be damaged by the static load pressure.
In the embodiment, the cross section of the supporting leg is circular, the first bag body 11 is positioned below the shed leg 8 in the supporting leg inner cavity of the water-shrinkable bag, the supporting leg inner cavity is filled with the first bag body 11 after water injection, and the supporting steel plates 10 are equally distributed on the edge of the bottom of the supporting leg, so that the stability of the supporting leg is enhanced.
The first bag body 11 is provided with five drainage holes 14, and the five drainage holes 14 are positioned on the same plane; the first body 11 in this embodiment is cylindrical after being filled with liquid, so that five drainage holes 14 and the water injection hole 15 can form a circle.
The water escape hole 14 is connected with the safety valve 12, when rock burst occurs, huge elastic energy released in surrounding rocks acts on the anti-impact support, the first bag body 11 instantly absorbs energy released by the surrounding rocks, when the pressure acting on the first bag body 11 exceeds a specified value, the safety valve 12 is automatically opened, the first bag body 11 is compressed, and part of water flows out of the water escape hole 14, so that the pressure in the first bag body 11 does not exceed an allowable value. 11 a week of first utricule sets up a plurality of outlet 14, can realize quick compression sluicing, reduces the impact effect of tunnel roof to supporting structure, avoids the support to receive the impact and damage.
Landing leg a week is equipped with four supporting steel plate 10, and 4 supporting steel plate 10 all are trapezoidally, and four supporting steel plate 10's waist is connected in proper order, and four supporting steel plate 10's top all is connected with the landing leg, can strengthen the stability of landing leg. The bottom of the supporting leg is provided with the base plate, so that the stress area is increased, the supporting leg is prevented from sinking or sliding, and the overall stability of the support is improved. The bottom of shed leg 8 in the landing leg is the part of strutting, prevents that first utricule 11 from destroying the back, and pressure water is scurried upward in the bag, protects first utricule 11 simultaneously. Meanwhile, the anti-deflection cover 6 is arranged at the joint of the shed legs 8 and the supporting legs, so that the support is prevented from collapsing and being damaged due to stress deflection when the roadway rock burst occurs.
Example 2
In a typical embodiment of the present invention, as shown in fig. 1, this embodiment provides a water bag unloading type anti-impact support, which includes a top beam 2, a fiber bag body 4, shed legs 8 and grid support plates 9, wherein the shed legs 8 are located on the upper portion of the retractable water bag support legs 7 described in embodiment 1, two ends of the top beam 2 are respectively connected with one or more shed legs 8, the fiber bag body 4 is tightly attached to the outer side of the shed legs 8, and the grid support plates 9 are disposed in the region between the shed legs 8 on both sides.
More specifically, the top beam 2 comprises two sub top beams 2, the two sub top beams 2 are hinged, and the top beam 2 is arc-shaped, so that the cross-sectional shape of an arched roadway can be better adapted, and the top beam is matched with a support column, so that the roadway space is effectively protected; top beam 2 is including looks articulated first sub-back timber 2 and the sub-back timber 2 of second, the articulated first canopy leg 8 in bottom of first sub-back timber 2, the articulated second canopy leg 8 in bottom of the sub-back timber 2 of second.
Two ends of the top beam 2 are respectively provided with an upper hinge 3 connected with a shed leg 8 below the top beam, and the top beam 2 is connected with the shed leg 8 through the upper hinges 3.
In order to reduce the whole weight of scour protection support, the high performance second utricule that adopts canopy leg 8 and water injection is strutted jointly, and the second utricule is located in the outside of canopy leg 8, and the second utricule has good tensile properties, and liquid wherein can transmit the axial force, and utricule transmission bending moment, the bearing capacity and the intensity of strutting can be satisfied in canopy leg 8 of closely laminating.
And a water injection nozzle 5 is arranged on one side of the second capsule body, a valve is installed on the water injection nozzle 5, the valve is opened during water injection, and the valve is closed after the water injection is finished.
It will be appreciated that a second bladder is provided between the legs 8 and the wall of the hole.
Grid fagging 9 in this embodiment adopts triangle-shaped grid fagging 9, and triangle-shaped grid fagging 9 simple structure, and the net concatenation is firm, adopts the pressure welding structure to make it have the characteristics that bear the weight of dynamic height, structure are light, can strengthen the stability of scour protection support. The triangular grating plate can be detached and installed at will, is convenient to cut and maintain. The raw material reaches A-grade fireproof and non-combustible grade aluminum alloy, so that the waterproof, anti-corrosion and damp-proof effects are realized, and the potential safety hazard is reduced.
By adopting the water bag unloading type anti-impact support disclosed in the embodiment, when the roadway is impacted, the first bag body 11 in the expansion part 16 is drained and depressurized, and the compression is quickly unloaded. In order to deal with the next rock burst, water can be injected into the capsule body through the water injection holes 15, so that the recycling of the contractible parts is ensured, and the long-term recycling is realized.
After the roadway is impacted by one time, the capsule body in the supporting leg is compressed, water can be injected into the capsule body through the water injection hole 15, so that the anti-impact effect can still be achieved, the recycling of the contractible part is ensured, the long-term recycling is realized, the labor intensity of workers is reduced, and the input cost of support is saved.
When the tunnel is installed, two arc-shaped top beams 2 are connected together by using a top hinge 1, two upper ends of the top beams 2 in the length direction are respectively provided with an upper hinge 3 connected with a shed leg 8 below the upper ends, the bottom of the shed leg 8 is opened in advance, and the top beams 2 are matched with the shed leg 8 to effectively protect the tunnel space. A cover body for preventing deflection is arranged at the joint of the expansion part 16 and the main body of the supporting leg, so that the support is prevented from collapsing and being damaged due to stress deflection when roadway rock burst occurs. Bottom landing leg round symmetry sets up four supporting steel plate 10, landing leg bottom installation backing plate, and a plurality of outlet 14 of utricule a week respectively set up a relief valve 12, insert canopy leg 8 in the expansion portion 16 of not water injection, through the water injection hole 15 of utricule bottom to wherein water injection, prop up canopy leg 8 and the combined support of back timber 2 and contact the tunnel top to back timber 2.
The support is erected on the bottom plate in a roadway, the high-performance second capsule with two ends propped in advance is fixed at two ends of the shed legs 8 respectively, a water injection nozzle 5 is arranged on one side of the capsule, a valve is mounted on the water injection nozzle 5 and is opened during water injection, the valve is closed after the water injection is finished, and the valve can be opened to discharge water in the capsule when the support needs to be moved, so that the weight of the support is reduced. Triangle-shaped grid fagging 9 concatenations are fixed in between two landing legs in scour protection support bottom, adopt the pressure welding structure to make it have high bearing capacity, the light characteristics of structure, can effectual control pucking, reinforcing scour protection support's overall stability.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A retractable water sac supporting leg is characterized by comprising a supporting leg, supporting steel plates and a sac body filled with liquid, wherein the sac body is fixed at the bottom of the supporting leg, the periphery of the bottom of the supporting leg is also connected with the supporting steel plates, the sac body is provided with a water injection hole and a water drainage hole, and the water drainage hole is connected with a safety valve; the legs have an inner cavity for receiving the bladder, which is disposed in the inner cavity and which expands the legs outside the inner cavity to form the bulb.
2. A collapsible bladder leg as claimed in claim 1, wherein said support steel plate is connected at a top end thereof to said leg, said steel plate top end being higher than an uppermost end of said bladder.
3. A collapsible bladder leg as claimed in claim 1 wherein said leg is circular in cross section and the first bladder body is located in the collapsible bladder leg chamber below the shelf leg and the filled first bladder body fills the leg chamber.
4. A collapsible bladder leg as claimed in claim 1 wherein said fill opening is provided with a one way valve and said bleed opening is provided with a safety valve.
5. A collapsible bladder leg as claimed in claim 1, wherein a shield is provided at the junction of said enlarged portion and the body of said leg to prevent deflection.
6. A collapsible bladder leg as claimed in claim 1, wherein said support steel plates comprise 4, 4 support steel plates each having a trapezoidal shape, the waists of four support steel plates being connected in series, the top ends of four support steel plates being connected to said leg.
7. The water bag unloading type anti-impact support frame as claimed in claim 1, which comprises a top beam, a fiber bag body, shed legs and grid supporting plates, wherein the shed legs are positioned above the retractable water bag supporting legs as claimed in any one of claims 1 to 6, one or more shed legs are respectively connected to two ends of the top beam, the fiber bag body is tightly attached to the outer sides of the shed legs, and the grid supporting plates are arranged in the areas between the shed legs at two sides.
8. The water bag unloading impact-resistant support frame as claimed in claim 7, wherein the top beam comprises a first sub top beam and a second sub top beam which are hinged with each other, the bottom end of the first sub top beam is hinged with a first shed leg, and the bottom end of the second sub top beam is hinged with a second shed leg.
9. A water bladder unloading impact-proof support as claimed in claim 7, wherein the fabric bladder body is provided between the shed legs and the wall of the hole.
10. The water bag unloading impact-proof bracket as defined in claim 7, wherein the fabric bag body is provided with a water filling port and a water discharge port, the water filling port is provided with a one-way valve, and the water discharge port is provided with a safety valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010784660.9A CN111878139A (en) | 2020-08-05 | 2020-08-05 | Contractible water bag supporting leg and water bag unloading type anti-impact support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010784660.9A CN111878139A (en) | 2020-08-05 | 2020-08-05 | Contractible water bag supporting leg and water bag unloading type anti-impact support |
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| Publication Number | Publication Date |
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| CN111878139A true CN111878139A (en) | 2020-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010784660.9A Pending CN111878139A (en) | 2020-08-05 | 2020-08-05 | Contractible water bag supporting leg and water bag unloading type anti-impact support |
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| CN (1) | CN111878139A (en) |
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| CN2782934Y (en) * | 2005-04-26 | 2006-05-24 | 中国矿业大学 | Four-column hydraulic prop with anti-impact air bag |
| CN102418538A (en) * | 2011-11-16 | 2012-04-18 | 辽宁工程技术大学 | High-speed energy absorption anti-impact retreat hydraulic support for coal mine |
| CN103541746A (en) * | 2013-10-16 | 2014-01-29 | 辽宁工程技术大学 | Energy absorbing and impact resisting back plate of support |
| CN105525931A (en) * | 2014-09-28 | 2016-04-27 | 辽宁工程技术大学 | Burst-preventing support device for rock burst round roadway |
| CN106351678A (en) * | 2016-09-14 | 2017-01-25 | 安徽理工大学 | Mine support allowing automatic adjustment of support stiffness |
| CN107539464A (en) * | 2017-07-20 | 2018-01-05 | 袁锦红 | A kind of agricultural fog machine |
| CN110700863A (en) * | 2019-09-25 | 2020-01-17 | 山东建筑大学 | Water bag filling pipe type combined arch frame and construction process thereof |
| CN210239712U (en) * | 2019-06-13 | 2020-04-03 | 中国神华能源股份有限公司 | Roadway support bracket |
| CN210264771U (en) * | 2019-04-29 | 2020-04-07 | 北京诚田恒业煤矿设备有限公司 | Sleeve connecting rod type anti-impact support |
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2020
- 2020-08-05 CN CN202010784660.9A patent/CN111878139A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2782934Y (en) * | 2005-04-26 | 2006-05-24 | 中国矿业大学 | Four-column hydraulic prop with anti-impact air bag |
| CN102418538A (en) * | 2011-11-16 | 2012-04-18 | 辽宁工程技术大学 | High-speed energy absorption anti-impact retreat hydraulic support for coal mine |
| CN103541746A (en) * | 2013-10-16 | 2014-01-29 | 辽宁工程技术大学 | Energy absorbing and impact resisting back plate of support |
| CN105525931A (en) * | 2014-09-28 | 2016-04-27 | 辽宁工程技术大学 | Burst-preventing support device for rock burst round roadway |
| CN106351678A (en) * | 2016-09-14 | 2017-01-25 | 安徽理工大学 | Mine support allowing automatic adjustment of support stiffness |
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