CN212535703U - Novel rock burst tunnel energy absorption and release scour protection support - Google Patents
Novel rock burst tunnel energy absorption and release scour protection support Download PDFInfo
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- CN212535703U CN212535703U CN202021583512.2U CN202021583512U CN212535703U CN 212535703 U CN212535703 U CN 212535703U CN 202021583512 U CN202021583512 U CN 202021583512U CN 212535703 U CN212535703 U CN 212535703U
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- 239000011435 rock Substances 0.000 title claims abstract description 49
- 238000010521 absorption reaction Methods 0.000 title description 5
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 119
- 239000010959 steel Substances 0.000 claims abstract description 119
- 230000008093 supporting effect Effects 0.000 claims abstract description 50
- 230000001681 protective effect Effects 0.000 claims abstract description 15
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 3
- 239000003245 coal Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001314 paroxysmal effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Abstract
The utility model discloses a novel rock burst roadway energy-absorbing and energy-releasing impact-proof support, wherein two rows of round holes are respectively prefabricated along the length of an external protective steel plate and an internal pressure-bearing supporting steel plate for installing a fixed anchor cable; when the support is installed, the inner side pressure-bearing supporting steel plate and the outer protective steel plate form a U shape corresponding to the cross section of the roadway, the bottom ends of the inner side pressure-bearing supporting steel plate are fixedly connected with fixed supporting legs respectively, and the fixed supporting legs are inserted into a roadway bottom plate and used for fixing the inner side pressure-bearing supporting steel plate; the outer end of the fixed anchor cable sequentially penetrates through round holes in the external protection steel plate and the inner side pressure-bearing support steel plate and is fixed through an anchorage device; sustainable scour protection energy-absorbing device and the high strength spring of stepping down are installed at the interval between inboard pressure-bearing support steel sheet and the outside protection steel sheet, and the both ends of high strength spring link firmly with inboard pressure-bearing support steel sheet and outside protection steel sheet respectively, and sustainable bottom and the inboard pressure-bearing support steel sheet of stepping down scour protection energy-absorbing device link firmly, leave one section distance between top and the outside protection steel sheet.
Description
Technical Field
The utility model belongs to coal mine tunnel supports the field, discloses a novel rock burst tunnel energy-absorbing energy release scour protection support, is particularly useful for the scour protection of rock burst mine tunnel to be strutted.
Background
With the increasing mining depth and the expanding mining range of mines in China, the occurrence frequency of rock burst disasters is gradually increased. Statistics show that: most of rock burst accidents occur in roadways, often cause roadway damage and support structure damage within a range of dozens of meters or even hundreds of meters, further cause serious casualties and economic losses, and seriously affect mine production and safe use of the roadways.
The occurrence of rock burst often has the characteristics of instantaneity, paroxysmal property and great destructiveness, and simultaneously great energy release is accompanied, the maximum released impact energy can reach 103MJ, these energies act primarily on two aspects: (1) acting on the coal rock mass to cause the breakage of the coal rock mass; (2) the coal rock mass is transferred to surrounding rocks and a supporting structure of the roadway, so that the surrounding rocks and the supporting structure are damaged. Along with the increase of the mining depth, the elastic strain energy accumulated in the coal rock mass is gradually increased, the more energy is released when the rock burst occurs, and the rock burst faces a roadwayThe greater the degree of surrounding rock and support structure damage.
At present, anchor bolt support is an important form of roadway support. Because the elongation of the anchor rod material is very low, the length of the anchor rod which is nearly fixed cannot adapt to the characteristics of large deformation of a rock burst roadway and instantaneous release of a large amount of elastic energy release, the fracture of the anchor rod body is easily caused, so that the supporting effect is lost, and further the collapse of the roadway in a large range is caused. For other forms of support, for example: wood supports, single hydraulic prop supports and the like are rigid supports, only meet the safety requirements of static roadway supports, and under the action of impact load, support materials can be instantaneously damaged, so that the roadway is unstable due to the loss of support capability.
In summary, for a rock burst mine, a reasonable roadway support system should satisfy the following characteristics: (1) the supporting system has enough supporting strength to ensure the supporting safety of the rock burst mine roadway; (2) the support system has the characteristics of impact resistance and energy absorption, and after the ground pressure is impacted, the support system can absorb part of impact energy to avoid the impact instability damage of surrounding rocks of the roadway; (3) the support system can adapt to the moderate deformation of the roadway, and the damage of the support structure is avoided.
SUMMERY OF THE UTILITY MODEL
To the technical problem that above-mentioned exists and to the requirement of novel supporting system, the utility model provides a be applicable to rock burst tunnel, possess slowly to let to press release can and strike fast and let a new type scour protection support of energy-absorbing characteristics of stepping down.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a novel rock burst roadway energy-absorbing energy-releasing impact-proof support comprises an external protective steel plate, an inner side pressure-bearing supporting steel plate, a sustainable abdicating impact-proof energy-absorbing device, a high-strength spring and a fixed anchor cable; the outer protection steel plate and the inner side pressure-bearing support steel plate are respectively pre-provided with two rows of round holes which are regularly arranged along the length and used for installing and fixing anchor cables; when the support is installed, the inner side pressure-bearing supporting steel plate and the outer protective steel plate form a U shape corresponding to the cross section of the roadway, the bottom ends of the inner side pressure-bearing supporting steel plate are fixedly connected with fixed supporting legs respectively, and the fixed supporting legs are inserted into a roadway bottom plate and used for fixing the inner side pressure-bearing supporting steel plate; the outer ends of the fixed anchor cables sequentially penetrate through round holes in the external protection steel plate and the inner side pressure-bearing support steel plate and are fixed through an anchorage device; sustainable scour protection energy-absorbing device and the high strength spring of stepping down are installed at the interval between inboard pressure-bearing support steel sheet and the outside protection steel sheet, and the both ends of high strength spring link firmly with inboard pressure-bearing support steel sheet and outside protection steel sheet respectively, and sustainable bottom and the inboard pressure-bearing support steel sheet of stepping down scour protection energy-absorbing device link firmly, leave one section distance between top and the outside protection steel sheet.
Further, sustainable stepping down scour protection energy-absorbing device is inside hollow multistage frustum shape structure, and when rock burst took place, sustainable stepping down scour protection energy-absorbing device can be quick crumple step by step under impact load's effect, absorbs the impact energy of partial release, and when crumpling, the device crescent with the area of contact of outside protection steel sheet can reduce its concentrated stress to outside protection steel sheet and apply.
Further, the length of the fixed supporting leg is 150-200 mm.
Furthermore, two ends of the high-strength spring are respectively welded with the external protection steel plate and the internal pressure-bearing support steel plate.
Furthermore, the end with the large area of the sustainable yielding impact-proof energy-absorbing device is fixed on the inner side pressure-bearing supporting steel plate in a welding mode, a certain distance is reserved between the other end of the sustainable yielding impact-proof energy-absorbing device and the outer protecting steel plate, and the distance is a yielding space of the support.
Furthermore, the sections of the inner side pressure-bearing supporting steel plate and the outer side protection steel plate are both L-shaped, and two rows of parallel round holes are formed in one edge of the inner side pressure-bearing supporting steel plate and the outer side protection steel plate; when the inner side pressure-bearing supporting steel plate and the outer protection steel plate are folded into a U shape along the shape of the roadway, the round holes on the inner side pressure-bearing supporting steel plate and the outer protection steel plate correspond to each other.
Furthermore, a plurality of inner side pressure-bearing support steel plate reinforcing wings are welded on the inner side pressure-bearing support steel plate along the length at equal intervals.
Furthermore, the reinforcing wing of the inner side pressure-bearing supporting steel plate is of a right-angled triangle structure,
the middle part of the plate body of the reinforcing wing of the inner side pressure-bearing supporting steel plate is provided with a round hole.
Because of above-mentioned technical scheme's application, the utility model discloses the positive effect brought:
(1) this technical scheme is through externally protecting steel sheet and inboard pressure-bearing support installation high strength spring between the steel sheet, and after the installation of fixed anchor rope, certain pretightning force is applyed to inboard pressure-bearing support steel sheet to the anchor rope, and high strength spring transmits the pretightning force for outside protection steel sheet again, makes inboard pressure-bearing support steel sheet and tunnel country rock closely laminate on the one hand, slows down the production of country rock initial stage deformation, and on the other hand makes the support have great yieldability, can adapt to the great deflection in country rock initial stage.
(2) This technical scheme can satisfy the requirement that adapts to rock burst tunnel slow deformation, and its deformation scope that allows is decided by the length of high strength spring and the sustainable interval of stepping down between scour protection energy-absorbing device and the outside protection steel sheet, compares current utility model and has the increase of great degree. Meanwhile, when the roadway is deformed slowly, before the sustainable abdicating energy absorption device plays a role, the support is compressed by the high-strength spring to realize slow abdicating and energy releasing, and the capacity of adapting to the slow deformation of the surrounding rock of the support is improved.
(3) The technical scheme can meet the requirement of absorbing the instantaneous energy release of the rock burst roadway. To the coal rock mass instant displacement in the rock burst, the condition of huge energy release such as throw, the support passes through the quick compression of high strength spring and the quick deformation of sustainable abdication scour protection energy-absorbing device, the effect that reaches quick energy-absorbing is imagined in advance, the hollow structure of sustainable abdication scour protection energy-absorbing device, can have quick reaction rate and good instantaneous deformability when rock burst takes place, in addition sustainable abdication energy-absorbing device takes place to burst the back step by step, increase gradually between the area of contact of device and outside protection steel sheet, and then can alleviate the pressure of outside protection steel sheet, improve supporting construction's strut life-span.
(4) This technical scheme makes novel support possess slowly let press release can and strike the dual characteristics of energy-absorbing of stepping down fast, according to the different support mounting array pitch of the dangerous grade design of impact in the tunnel, the area that exposes of reasonable control country rock, the improvement that can show the current situation of strutting in rock burst tunnel, because of supporting construction's damage leads to the tunnel unstability when avoiding rock burst to take place, the life safety of guarantee tunnel inside personnel when rock burst takes place.
(5) This technical scheme shifts the fixed position of stock to supporting construction, avoids the stock atress after to the extrusion of country rock to destroy, maintains the wholeness of country rock, improves country rock self bearing capacity.
The utility model relates to a rationally, easily realize, fine practical value has.
Drawings
The technical solution of the present invention will be further explained with reference to the accompanying drawings.
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a front view of the sustainable abdicating impact-proof energy-absorbing device of the utility model.
Figure 3 is the utility model discloses a sustainable scour protection energy-absorbing device top view of stepping down.
Fig. 4 is a sectional view taken along line a-a of fig. 2.
Figure 5 is a front view of the reinforcing wing of the inner pressure bearing support steel plate.
FIG. 6 is a top view of the reinforcing wing of the inner bearing supporting steel plate.
Fig. 7 is an enlarged partial front view B of fig. 1.
In the figure: 1. an outer side protective steel plate; 2. a high-strength spring; 3. fixing the anchor cable; 4. the anti-impact energy absorption device can continuously give way; 5. an inner side pressure bearing support steel plate; 6. 6', prefabricating anchor cable mounting holes; 7. fixing the supporting legs; 8. the inner side bearing support steel plate reinforcing wing.
The specific implementation mode is as follows:
for better explanation of the present invention, the technical solution of the present invention will be further described in detail by specific implementation methods with reference to the accompanying drawings.
As shown in fig. 1 and 2, the utility model discloses a novel rock burst tunnel energy-absorbing energy-releasing scour protection support, including outside protection steel sheet 1, high strength spring 2, fixed anchor rope 3, sustainable scour protection energy-absorbing device 4 that steps down, steel sheet 5 is strutted to inboard pressure-bearing, prefabricated anchor rope mounting hole 6, 6', fixed leg 7, inboard pressure-bearing is strutted the steel sheet and is strengthened wing 8.
As shown in fig. 1, the external protection steel plate 1 is bent into a U shape along the roadway, wherein two rows of prefabricated anchor cable installation holes 6' arranged regularly are prefabricated on two sides of the axial line for fixing the anchor cables 3.
The shape of the inner side pressure-bearing supporting steel plate 5 is basically the same as that of the outer side protective steel plate 1, two rows of prefabricated anchor cable mounting holes 6 which are regularly arranged are prefabricated on two sides of the central axis of the inner side pressure-bearing supporting steel plate 5, correspond to the prefabricated anchor cable mounting holes 6' on the outer protective steel plate 1, and are used for mounting and fixing the anchor cables 3.
As shown in fig. 5 and 6, the inner side pressure-bearing support steel plate 5 is welded with inner side pressure-bearing support steel plate reinforcing wings 8 at a certain pitch, the inner side pressure-bearing support steel plate reinforcing wings 8 are in a right-angled triangle structure, and the middle part of the plate body of the inner side pressure-bearing support steel plate reinforcing wings is provided with a round hole.
The vertical part of the inner side pressure-bearing supporting steel plate 5 is connected with a fixed supporting leg 7, the length of the fixed supporting leg 7 is 150-200 mm, and when the support is installed, the fixed supporting leg 7 is inserted into a roadway bottom plate to fix the inner side pressure-bearing supporting steel plate 5, so that the overall stability of the support is enhanced.
As shown in fig. 2-4, 7, sustainable yielding scour protection energy-absorbing device 4 is the multistage frustum shape structure of inside cavity, and when rock burst took place, sustainable yielding scour protection energy-absorbing device 4 can be quick under impact load's effect burst step by step and contract, absorbs the impact energy of partial release, when collapsing, the area of contact of this device 4 and outside protective steel plate 1 crescent, can reduce its concentrated stress to outside protective steel plate 1 and apply.
As shown in fig. 1, the high-strength spring 2 is fixed between the outer protective steel plate 1 and the inner pressure-bearing support steel plate 5.
The fixed anchor cable 3 is a high-strength prestressed anchor cable and is used for fixing the whole anti-impact support.
As a further improvement, high strength spring 2 and sustainable scour protection energy-absorbing device 4 of stepping down are installed to interval between the steel sheet 5 are strutted to outside protection steel sheet 1 and inboard pressure-bearing, and high strength spring 2's both ends are strutted the steel sheet 5 welding with outside protection steel sheet 1 and inboard pressure-bearing respectively and are in the same place.
As the utility model discloses a further improvement, on the sustainable 4 big one ends in area of the scour protection energy-absorbing device that let down adopted the welded mode to be fixed in inboard pressure-bearing support steel sheet 5, left certain interval between the other end and the outside protection steel sheet 1, as shown in figure 7, this interval was the space of letting down of support.
Claims (8)
1. A novel rock burst roadway energy-absorbing energy-releasing impact-preventing support is characterized by comprising an external protective steel plate, an inner side pressure-bearing supporting steel plate, a sustainable abdicating impact-preventing energy-absorbing device, a high-strength spring and a fixed anchor cable; the outer protection steel plate and the inner side pressure-bearing support steel plate are respectively pre-provided with two rows of round holes which are regularly arranged along the length and used for installing and fixing anchor cables; when the support is installed, the inner side pressure-bearing supporting steel plate and the outer protective steel plate form a U shape corresponding to the cross section of the roadway, the bottom ends of the inner side pressure-bearing supporting steel plate are fixedly connected with fixed supporting legs respectively, and the fixed supporting legs are inserted into a roadway bottom plate and used for fixing the inner side pressure-bearing supporting steel plate; the outer ends of the fixed anchor cables sequentially penetrate through round holes in the external protection steel plate and the inner side pressure-bearing support steel plate and are fixed through an anchorage device; sustainable scour protection energy-absorbing device and the high strength spring of stepping down are installed at the interval between inboard pressure-bearing support steel sheet and the outside protection steel sheet, and the both ends of high strength spring link firmly with inboard pressure-bearing support steel sheet and outside protection steel sheet respectively, and sustainable bottom and the inboard pressure-bearing support steel sheet of stepping down scour protection energy-absorbing device link firmly, leave one section distance between top and the outside protection steel sheet.
2. The novel impact ground pressure roadway energy-absorbing energy-releasing impact-preventing support is characterized in that the sustainable yielding impact-preventing energy-absorbing device is of a multistage frustum-shaped structure with a hollow inner part, when impact ground pressure occurs, the sustainable yielding impact-preventing energy-absorbing device can be rapidly and gradually collapsed under the action of impact load, impact energy released by a part of the device is absorbed, the contact area between the device and an external protection steel plate is gradually increased when the device is collapsed, and the concentrated stress applied to the external protection steel plate can be reduced.
3. The novel rock burst roadway energy-absorbing and energy-releasing impact-preventing support frame as claimed in claim 1, wherein the length of the fixed supporting leg is 150-200 mm.
4. The novel rock burst roadway energy-absorbing and energy-releasing impact-preventing support frame as claimed in claim 1, wherein two ends of the high-strength spring are respectively welded with an outer protection steel plate and an inner pressure-bearing support steel plate.
5. The novel rock burst roadway energy-absorbing and energy-releasing impact-preventing support is characterized in that one end, with a large area, of the sustainable yielding impact-preventing and energy-absorbing device is fixed on an inner pressure-bearing supporting steel plate in a welding mode, and a certain distance is reserved between the other end of the sustainable yielding impact-preventing and energy-absorbing device and an outer protective steel plate, wherein the distance is a yielding space of the support.
6. The novel rock burst roadway energy-absorbing and energy-releasing impact-preventing support frame as claimed in claim 1, wherein the cross sections of the inner pressure-bearing support steel plate and the outer protective steel plate are both L-shaped, and two rows of parallel round holes are formed in one edge of the inner pressure-bearing support steel plate and the outer protective steel plate; when the inner side pressure-bearing supporting steel plate and the outer protection steel plate are folded into a U shape along the shape of the roadway, the round holes on the inner side pressure-bearing supporting steel plate and the outer protection steel plate correspond to each other.
7. The novel rock burst roadway energy-absorbing and energy-releasing impact-preventing support frame as claimed in claim 1, wherein a plurality of inner pressure-bearing support steel plate reinforcing wings are welded on the inner pressure-bearing support steel plate at equal intervals along the length.
8. The novel rock burst roadway energy-absorbing energy-releasing impact-preventing support frame as claimed in claim 7, wherein the inner pressure-bearing support steel plate reinforcing wing is of a right-angled triangle structure,
the middle part of the plate body of the reinforcing wing of the inner side pressure-bearing supporting steel plate is provided with a round hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021583512.2U CN212535703U (en) | 2020-08-04 | 2020-08-04 | Novel rock burst tunnel energy absorption and release scour protection support |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021583512.2U CN212535703U (en) | 2020-08-04 | 2020-08-04 | Novel rock burst tunnel energy absorption and release scour protection support |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112943294A (en) * | 2021-02-07 | 2021-06-11 | 湖南科技大学 | Assembled roadway reinforcing and supporting structure |
| CN113090294A (en) * | 2021-05-06 | 2021-07-09 | 安徽理工大学 | Application method of anti-impact cooperative yielding annular support for deep well roadway |
| CN113404523A (en) * | 2021-07-05 | 2021-09-17 | 淮北市平远软岩支护工程技术有限公司 | Rock burst monitoring system based on pressure relief blasting |
-
2020
- 2020-08-04 CN CN202021583512.2U patent/CN212535703U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112943294A (en) * | 2021-02-07 | 2021-06-11 | 湖南科技大学 | Assembled roadway reinforcing and supporting structure |
| CN113090294A (en) * | 2021-05-06 | 2021-07-09 | 安徽理工大学 | Application method of anti-impact cooperative yielding annular support for deep well roadway |
| CN113404523A (en) * | 2021-07-05 | 2021-09-17 | 淮北市平远软岩支护工程技术有限公司 | Rock burst monitoring system based on pressure relief blasting |
| CN113404523B (en) * | 2021-07-05 | 2023-11-10 | 淮北市平远软岩支护工程技术有限公司 | Rock burst monitoring system based on pressure relief blasting |
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Granted publication date: 20210212 |