CN111058882B - Top beam of anti-impact advanced hydraulic support - Google Patents
Top beam of anti-impact advanced hydraulic support Download PDFInfo
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- CN111058882B CN111058882B CN201911273667.8A CN201911273667A CN111058882B CN 111058882 B CN111058882 B CN 111058882B CN 201911273667 A CN201911273667 A CN 201911273667A CN 111058882 B CN111058882 B CN 111058882B
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- 229920001971 elastomer Polymers 0.000 claims abstract description 58
- 239000002184 metal Substances 0.000 claims abstract description 42
- 229920002635 polyurethane Polymers 0.000 claims abstract description 42
- 239000004814 polyurethane Substances 0.000 claims abstract description 42
- 238000010521 absorption reaction Methods 0.000 claims abstract description 33
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 239000011159 matrix material Substances 0.000 claims abstract description 5
- 230000005489 elastic deformation Effects 0.000 claims abstract description 4
- 239000003245 coal Substances 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 230000008093 supporting effect Effects 0.000 abstract description 4
- 230000003044 adaptive effect Effects 0.000 abstract 1
- 238000005065 mining Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification 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
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/54—Details of the ends of props
- E21D15/55—Details of the ends of props of prop heads or feet
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
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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)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
The invention provides a top beam of an anti-impact advance hydraulic support, which comprises a front support, a rear support, a front top beam box body, a rear top beam box body, a metal ball, a polyurethane ball and an energy absorption column, wherein the front support is arranged on the front top beam box body; the energy absorption column comprises a rubber top, a framework, a fixing ring, a spring, a rubber matrix, a mounting plate and the like; the skeleton comprises many arc steel wire framework and circle steel wire framework, encapsulates in the rubber top. The top beam can be quickly adapted to the uneven top plate under various conditions, and the rubber top is deformed first, so that primary suction load is realized; then the spring and the rubber matrix generate elastic deformation at the same time, and secondary suction load is realized; the mounting plate pushes the metal balls and the polyurethane balls in the top beam box body to generate friction, and three-level suction loading is realized. The top beam of the impact-resistant forepoling hydraulic support can be quickly, adaptively and comprehensively abutted, is uniform in pressure bearing, is adaptive to impact loads of different levels, absorbs the loads step by step, effectively absorbs the impact energy of the top plate, and effectively improves the supporting effect of the roadway forepoling hydraulic support.
Description
Technical Field
The invention relates to the field of forepoling of coal mine stoping roadways, in particular to a top beam of a forepoling hydraulic support with an anti-impact function.
Background
The advance hydraulic support is mainly used for advance temporary support of a coal mine stoping roadway, so that the stability of a roadway top plate is guaranteed in the coal mine mining process, but due to the influences of factors such as coal mine roadway geological conditions, complex working condition environment, rock burst, mining stress and the like, instantaneous heavy-load impact load is often generated, the load can be directly acted on a top beam of the advance hydraulic support, the advance support is caused to lose effectiveness, the effect of roadway support is lost, construction dangers such as falling and collapse of the roadway top plate are caused, and the coal mine mining safety is seriously influenced.
The invention patent 201811143634.7 discloses a self-adaptive top beam of a hydraulic advance support, which is characterized in that the top beam of the hydraulic advance support has certain swinging capacity in the longitudinal and transverse directions through a limit device of the top beam and an upright post.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide a top beam of an anti-impact advanced hydraulic support, which can be quickly adapted to the shape of an uneven top plate, can be in close contact with the top plate, has instant suction capacity and high support strength, has the functions of comprehensive protection and anti-impact, and can effectively ensure the safety of underground mining.
In order to achieve the purpose, the invention adopts the following technical scheme:
the top beam of the anti-impact advanced hydraulic support comprises a front support, a rear support, a front top beam box body, a rear top beam box body, metal balls, polyurethane balls and energy-absorbing columns.
Furthermore, the front support and the rear support are main parts of the forepoling, the upper end of the front support is connected with a front top beam box body, the upper end of the rear support is connected with a rear top beam box body, and the two box bodies are respectively provided with a metal ball and a polyurethane ball.
Furthermore, the front top beam box body and the rear top beam box body are filled with metal balls and polyurethane balls, the volume fraction ratio of the metal balls to the polyurethane balls in each box body is 1:1, the diameter of each metal ball is 12mm, 16mm, 18mm and 20mm, the number ratio of the metal balls in each box body is 1:1:1:1, the diameter of each polyurethane ball is 18mm, 20mm, 24mm and 30mm, and the number ratio of the metal balls in each box body is 1:1:1: 1.
Furthermore, the energy absorption column is composed of a rubber top, a framework, a fixing ring, a spring, a rubber base body, a mounting plate, a joint and a connecting pipe.
Furthermore, the framework is composed of a plurality of arc-shaped steel wire frameworks and a circle steel wire framework.
Furthermore, the framework is packaged in the rubber top, the rubber top is installed on the fixing ring, the spring is packaged in the rubber base body, the rubber base body is fixed on the installation plate, the joint is installed at the lower end of the fixing ring, and the lower end of the joint is fixed on the connecting pipe.
Furthermore, a plurality of energy absorption columns are arranged at the upper end of the top beam in parallel and can slide up and down in the box body.
And furthermore, before the hydraulic support works, the connecting pipe of the energy-absorbing column is connected with an air source, the rubber top is inflated to expand, and when the air in the rubber top reaches the rated pressure, the inflation process is finished.
The working principle of the invention is as follows:
and (4) fast self-adaptive top connection. When the advanced hydraulic support works, the hydraulic support lifts the top beam, and the rubber top of the energy absorption column on the top beam is contacted with the top plate of the coal mine roadway; because the roadway top plate is uneven, when the rubber top is contacted with the convex part of the top plate, the energy absorption column is pressed down and moves downwards, the mounting plate pushes the metal balls and the polyurethane balls at the lower end, and the metal balls and the polyurethane balls move in the top beam box body under the pushing of the mounting plate; the metal balls and the polyurethane balls under the convex positions move to the concave positions, the metal balls and the polyurethane balls push the energy absorption columns under the concave positions of the top plate to move upwards, and the rubber tops on the energy absorption columns are in overall contact with the concave positions; the rubber top and the top plate at different positions are in full contact. The metal balls and the polyurethane balls can rapidly move in the top beam box body to meet the up-and-down moving function of the energy absorption column, so that the top beam can rapidly adapt to top plates with different concave-convex conditions, uniform contact support is generated between the advance hydraulic support and a roadway top plate, and rapid self-adaptive roof contact and effective support of the top beam are realized.
And (5) multi-stage suction supporting. When the hydraulic advance support is subjected to instantaneous impact load of a roadway top plate, if the impact load value is small, the rubber top at the upper end of the energy absorption column can be elastically deformed to absorb the impact energy of the top plate, the supporting force between the top beam and the top plate is ensured to be in a relatively constant state, and the roadway top plate and the top beam of the hydraulic advance support are ensured to be in an intact state; when the leading hydraulic support is subjected to a large impact load of a roadway top plate, the deformation of the rubber top cannot completely absorb impact energy, and at the moment, the spring and the rubber base body simultaneously generate elastic deformation to absorb the residual impact energy; when the hydraulic advance support is very large in impact energy of a roadway roof, the deformation of the rubber top, the springs and the rubber base body still cannot completely absorb the impact energy, the energy absorption column can move under the action of impact load, the mounting plate at the lower end of the energy absorption column pushes the metal balls and the polyurethane balls in the top beam box, at the moment, relative friction can occur between the metal balls and the polyurethane balls to absorb a part of energy, in addition, the polyurethane balls can elastically deform under the action of the mounting plate to absorb the energy, and the metal balls and the polyurethane balls in the box are different in size and large in quantity, so that the metal balls and the polyurethane balls can absorb a large amount of energy in the contact friction and deformation processes, and the roadway roof and the hydraulic advance support are guaranteed not damaged under the action of the impact load. Under the impact energy of different levels of the roadway roof, the top beam can realize bearing and energy absorption of different levels, and an ideal supporting state is achieved.
The invention has the following advantages:
(1) can adapt to the uneven roof of various condition fast, realize the comprehensive contact of back timber with the roof, the pressure-bearing is even, effectively avoids rock burst to come the time because the uneven stress concentration that causes of roof destroys.
(2) The device can adapt to impact loads of different levels, absorb the loads step by step, effectively absorb impact energy of the top plate, avoid damage caused by rock burst, achieve effective support and ensure safety of underground operation space.
(3) The whole device is simple in structure, can be installed according to actual conditions, and is strong in implementation and operability.
Drawings
Fig. 1 is a schematic structural diagram of a top beam of an impact-resistant forepoling support.
Fig. 2 is a schematic diagram of the working state of the top beam of the impact-proof advance hydraulic support.
FIG. 3 is a schematic structural diagram of an energy-absorbing column of a top beam of an anti-impact forepoling hydraulic support according to the invention.
FIG. 4 is a schematic illustration of the skeleton of the energy absorbing pillar of FIG. 3.
The energy-absorbing energy-saving device comprises a front support 1, a rear support 2, a front top beam box 3, a rear top beam box 4, a metal ball 5, a polyurethane ball 6, an energy-absorbing column 7, a rubber top 8, a skeleton 9, an arc steel wire skeleton 9-1, a circular steel wire skeleton 9-2, a fixing ring 10, a spring 11, a rubber base 12, a mounting plate 13, a joint 14 and a connecting pipe 15.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived from the embodiments of the present invention by a person skilled in the art without any creative effort, should be included in the protection scope of the present invention.
Referring to fig. 1 to 4, a top beam of an impact-resistant advanced hydraulic support of the present invention is described in detail, and the top beam of the impact-resistant advanced hydraulic support of the present invention is mainly suitable for an advanced hydraulic support.
As shown in fig. 1 to 4, the top beam of the impact-resistant hydraulic advance support comprises a front support (1), a rear support (2), a front top beam box body (3), a rear top beam box body (4), a metal ball (5), a polyurethane ball (6), an energy-absorbing column (7), a rubber top (8), a framework (9), an arc-shaped steel wire framework (9-1), a circle-shaped steel wire framework (9-2), a fixing ring (10), a spring (11), a rubber base body (12), a mounting plate (13), a joint (14) and a connecting pipe (15).
The front support (1) and the rear support (2) are main parts of the forepoling, the upper end of the front support (1) is connected with a front top beam box body (3), the upper end of the rear support (2) is connected with a rear top beam box body (4), metal balls (5) and polyurethane balls (6) are respectively arranged in the two box bodies, the volume fraction ratio of the metal balls (5) to the polyurethane balls (6) in the box bodies is 1:1, the diameters of the metal balls (5) are respectively 12mm, 16mm, 18mm and 20mm, the number ratio is respectively 1:1:1, the diameters of the polyurethane balls are respectively 18mm, 20mm, 24mm and 30mm, and the number ratio is respectively 1:1:1: 1.
A plurality of energy-absorbing columns (7) are arranged at the upper end of the top beam in parallel, and the energy-absorbing columns (7) can slide up and down in the box body. The energy absorption column (7) is composed of a rubber top (8), a framework (9), a fixing ring (10), a spring (11), a rubber base body (12), a mounting plate (13), a connector (14) and a connecting pipe (15). Wherein skeleton (9) comprise many arc steel wire framework (9-1) and circle steel wire framework (9-2), and encapsulation in rubber top (8) skeleton (9), and rubber top (8) are installed on retainer plate (10), and encapsulation in rubber base member (12) spring (11), and rubber base member (12) are fixed on mounting panel (13), and joint (14) are installed to the lower extreme of retainer plate (10), and the lower extreme of joint (14) is fixed on connecting pipe (15).
When the hydraulic advance support does not work, the initial position of the top beam is as shown in figure 1, when the hydraulic advance support supports, the connecting pipe (15) is connected with an air source, at the moment, the rubber top (8) is inflated and expanded, and when the air in the rubber top (8) reaches the rated pressure, the inflation process is finished. When the advanced hydraulic support works, the hydraulic support lifts the top beam, as shown in fig. 2, a rubber top (8) of an energy absorption column (7) on the top beam is contacted with a top plate of a coal mine roadway, and because the roadway top plate is uneven, when the rubber top (8) is contacted with a convex part of the top plate, the energy absorption column (7) is pressed down and moves downwards, and meanwhile, a mounting plate (13) pushes metal balls (5) and polyurethane balls (6) at the lower end, and the metal balls (5) and the polyurethane balls (6) move in top beam box bodies (3 and 4) under the pushing of the mounting plate (13); the metal ball (5) and the polyurethane ball (6) at the convex position move to the concave position, the metal ball (5) and the polyurethane ball (6) push the energy absorption column (7) at the concave position of the top plate to move upwards, the rubber top (8) on the energy absorption column (7) is in overall contact with the concave position of the top plate, the rubber top (8) at different positions can deform after being in contact with the top plate, and the contact surface of the rubber top (8) is in overall contact with the top plate. Because of metal ball (5) and polyurethane ball (6) can be quick remove in back timber box (3, 4), satisfy the function that reciprocates of energy-absorbing post (7), so under the different unsmooth circumstances of roof, the back timber can both produce even contact between with the tunnel roof and support, reaches the effect that quick self-adaptation connects the top to strut.
When impact pressure is temporary, the rubber top (8) at the upper end of the energy-absorbing column (7) is elastically deformed to absorb a part of impact energy of the top plate, and the impact energy is first-stage energy absorption; if the deformation of the rubber top (8) can not completely absorb the impact energy, the spring (11) and the rubber base body (12) can simultaneously generate elastic deformation to absorb the residual impact energy, which is secondary energy absorption; when the deformation of the rubber top (8), the spring (11) and the rubber matrix (12) still cannot completely absorb impact energy, the energy-absorbing column (7) moves under the action of impact load, the mounting plate (13) at the lower end of the energy-absorbing column (7) pushes the metal balls (5) and the polyurethane balls (6) in the top beam box body (3, 4), at the moment, relative friction can be generated between the metal balls (5) and the polyurethane balls (6) to absorb a part of energy, in addition, the polyurethane balls (6) can elastically deform under the action of the mounting plate (13) to absorb energy, and the metal balls (5) and the polyurethane balls (6) in the box body are different in size and large in quantity, so that a large amount of energy can be absorbed by the metal balls (5) and the polyurethane balls (6) in the contact friction and deformation processes, and the three-stage energy absorption is realized. Under the condition of different levels of impact energy, the top beam can effectively ensure that the roadway top plate and the advance hydraulic support cannot be damaged under the action of impact load.
The above description is illustrative of the present invention and is not to be construed as limiting the present invention, and any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The top beam of the anti-impact advanced hydraulic support is characterized by comprising a front support, a rear support, a front top beam box body, a rear top beam box body, a metal ball, a polyurethane ball and an energy absorption column;
the energy absorption column consists of a rubber top, a framework, a fixing ring, a spring, a rubber matrix, a mounting plate, a joint and a connecting pipe;
the framework consists of a plurality of arc-shaped steel wire frameworks and a circle steel wire framework;
the framework is packaged in the rubber top, the rubber top is arranged on the fixed ring, the spring is packaged in the rubber base body, the rubber base body is fixed on the mounting plate, the lower end of the fixed ring is provided with the joint, and the lower end of the joint is fixed on the connecting pipe;
the front support and the rear support are main parts of the forepoling, the upper end of the front support is connected with a front top beam box body, the upper end of the rear support is connected with a rear top beam box body, and the two box bodies are respectively provided with a metal ball and a polyurethane ball;
a plurality of energy absorption columns are arranged at the upper end of the top beam in parallel and can slide up and down in the box body, so that the shape of the uneven top plate is quickly adapted, and the close contact with the top plate is realized;
the energy absorption column has instantaneous absorption capacity, and when impact load comes, the rubber top in the energy absorption column is deformed first to realize primary absorption; then the spring and the rubber matrix generate elastic deformation at the same time to absorb impact energy and realize secondary load absorption; the energy absorption column can move under the action of residual impact load, the mounting plate at the lower end of the energy absorption column pushes the metal balls and the polyurethane balls in the top beam box, relative friction can be generated between the metal balls and the polyurethane balls, meanwhile, the polyurethane balls can elastically deform to absorb a large amount of energy, and three-stage absorption is realized;
the energy absorption column connecting pipe is mainly used for being connected with an air source before the advance hydraulic support works, the rubber top is inflated to enable the rubber top to expand, and when the air in the rubber top reaches rated pressure, the inflation process is finished.
2. The top beam of the impact-resistant hydraulic advance support as claimed in claim 1, wherein the front support and the rear support are main parts of the advance support, a front top beam box is connected to the upper end of the front support, and a rear top beam box is connected to the upper end of the rear support.
3. The top beam of the impact-resistant advanced hydraulic support according to claim 1, wherein metal balls and polyurethane balls are fully distributed in the front top beam box body and the rear top beam box body, the volume fraction ratio of the metal balls to the polyurethane balls in each box body is 1:1, the metal balls are 12mm, 16mm, 18mm and 20mm in diameter, the number ratio of the metal balls in each box body is 1:1:1, the polyurethane balls are 18mm, 20mm, 24mm and 30mm in diameter, and the number ratio of the metal balls in each box body is 1:1:1: 1.
4. The top beam of the impact-resistant forepoling bracket as claimed in claim 1, wherein a plurality of energy-absorbing columns are arranged in parallel at the upper end of the top beam, and the energy-absorbing columns can slide up and down in the box body.
5. The top beam of the impact-proof hydraulic advance support as claimed in claim 1, wherein before operation, the connecting pipe of the energy-absorbing column is connected with an air source, the rubber top is inflated to expand, and when the air in the rubber top reaches a rated pressure, the inflation process is finished.
6. The top beam of the impact-proof hydraulic advance support as claimed in claim 1, wherein the metal balls and the polyurethane balls in the front top beam box body and the rear top beam box body can move freely, and the polyurethane balls can deform under pressure.
7. The top beam of the impact-resistant forepoling bracket as claimed in claim 1, wherein the rubber roof of the energy-absorbing column on the top beam is in direct contact with the roof of the coal mine tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911273667.8A CN111058882B (en) | 2019-12-12 | 2019-12-12 | Top beam of anti-impact advanced hydraulic support |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911273667.8A CN111058882B (en) | 2019-12-12 | 2019-12-12 | Top beam of anti-impact advanced hydraulic support |
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| CN111058882A CN111058882A (en) | 2020-04-24 |
| CN111058882B true CN111058882B (en) | 2021-02-26 |
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| CN201911273667.8A Active CN111058882B (en) | 2019-12-12 | 2019-12-12 | Top beam of anti-impact advanced hydraulic support |
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| CN112595480B (en) * | 2020-12-07 | 2021-08-24 | 中国矿业大学 | Roadway hydraulic energy-absorbing support analog simulation experiment device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE655844A (en) * | 1963-11-29 | 1965-03-16 | ||
| SU857494A1 (en) * | 1978-05-24 | 1981-08-23 | Институт Горной Механики Им. Г.А.Цулукидзе Ан Гсср | Shaft lining hydraulic prop |
| CN103452570A (en) * | 2013-09-04 | 2013-12-18 | 辽宁工程技术大学 | Mining cage type anti-shocking ground pressure component |
| CN108708759B (en) * | 2018-05-18 | 2020-10-30 | 辽宁大学 | Reusable energy-absorbing roadway anti-impact hydraulic support and anti-impact method thereof |
| CN109653775B (en) * | 2019-01-22 | 2023-10-31 | 湖南科技大学 | Buffer bracket capable of realizing three-dimensional yielding and supporting method |
| CN110067576B (en) * | 2019-05-05 | 2021-10-01 | 厦门鹭恒达建筑工程有限公司 | Extrusion expansion rock highway tunnel supporting device |
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