CN209742903U - Tunnel structure - Google Patents
Tunnel structure Download PDFInfo
- Publication number
- CN209742903U CN209742903U CN201822254036.9U CN201822254036U CN209742903U CN 209742903 U CN209742903 U CN 209742903U CN 201822254036 U CN201822254036 U CN 201822254036U CN 209742903 U CN209742903 U CN 209742903U
- Authority
- CN
- China
- Prior art keywords
- pressure relief
- section
- roadway
- reinforcing
- blasting
- Prior art date
- 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.)
- Active
Links
Landscapes
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The utility model provides a tunnel structure, include: the pressure relief hole is symmetrically arranged on two sides of the roadway and comprises a blasting pressure relief section and a hole sealing reinforcing section arranged between the roadway and the blasting pressure relief section, reinforcing materials are filled in the hole sealing reinforcing section, and explosives and at least one detonator are arranged in the blasting pressure relief section. The utility model provides a tunnel structure, the pressure ring is unloaded in the top layer certain range formation low stress around the tunnel after the release blasting, and has formed stress concentration's the circle from bearing in the country rock deep, and concentrated stress is mainly born by this rock mass from bearing the circle. Therefore, the self-supporting force of the surrounding rock is fully exerted, and the stability of the pressure relief rock mass is guaranteed. Meanwhile, because the rock mass of the self-bearing ring is in the deep part of the surrounding rock and basically in a three-dimensional stress state, the stability is greatly improved.
Description
Technical Field
The utility model relates to a soft rock engineering of colliery struts technical field, particularly, relates to a tunnel structure.
Background
No matter what type of combined support is carried out after the roadway is excavated, stress is redistributed, the internal stress of roadway surrounding rocks is highly concentrated, and the stress can be released only through the deformation of the surrounding rocks, so that the roadway floor heave deformation occurs to different degrees in the existing support, the deformation and the damage of the roadway support are seriously caused, and the requirements of ventilation, transportation, pedestrians and safety production cannot be met.
SUMMERY OF THE UTILITY MODEL
the present invention aims at least solving one of the technical problems existing in the prior art or the related art.
In view of this, the utility model aims at providing a tunnel structure.
In order to achieve the above object, the technical scheme of the utility model provides a tunnel structure, include: the pressure relief hole is symmetrically arranged on two sides of the roadway and comprises a blasting pressure relief section and a hole sealing reinforcing section arranged between the roadway and the blasting pressure relief section, reinforcing materials are filled in the hole sealing reinforcing section, and explosives and at least one detonator are arranged in the blasting pressure relief section.
After the roadway is excavated, surrounding rocks are changed from a three-way stress state to a two-way stress state, the stress state of the surrounding rocks is redistributed, and a surrounding rock internal stress height concentrated zone appears, and the main reason for roadway damage is that the internal stress height concentrated zone of the surrounding rocks of the roadway is concentrated.
In the scheme, after the explosive is detonated by the detonator, the explosive is in a condensed phase, so that the detonation process is high in pressure (the detonation of the condensed phase can reach 10 gigapascals), high in temperature (can reach 103K) and short in duration (can reach microsecond order). When blasting, the medium around the detonation wave interacts to generate shock wave or stress wave in the medium, which pushes the object to move, causing spalling, breaking and the like. And blasting is carried out in a closed space inside a deep rock stratum of a roadway base angle.
Through blasting at the blasting release section of release hole, can make the elastic deformation that accumulates in the deep country rock release with the form of deformation fracture to lead to the stress redistribution in the country rock deep, reform the broken district, plastic region and elastic zone, and make the elastic zone of stress concentration shift to the country rock more depths, two sides and bottom plate shallow country rock are in the stress reduction district. Namely, after pressure relief blasting, a low-stress pressure relief ring is formed in a certain range on the surface layer around the roadway, a self-bearing ring with concentrated stress is formed in the deep part of the surrounding rock, and the concentrated stress is mainly borne by the rock mass of the self-bearing ring. Therefore, the self-supporting force of the surrounding rock is fully exerted, and the stability of the pressure relief rock mass is guaranteed. Meanwhile, because the rock mass of the self-bearing ring is in the deep part of the surrounding rock and basically in a three-dimensional stress state, the stability is greatly improved. The scheme is not only suitable for one-time roadway support of the high-ground-stress soft rock difficult-to-maintain roadway, but also suitable for application of damaged roadway repair conditions.
meanwhile, the explosive can also compress the reinforcing material in the hole sealing reinforcing section when exploding in the blasting pressure relief section, so that the reinforcing material is more tightly connected with the wall of the pressure relief hole into a whole, and the strength of the whole rock body of the hole sealing reinforcing section is improved.
it should also be noted that in the present scheme, by enabling elastic deformation accumulated in deep surrounding rocks to be released in the form of deformation fracture, the width of a coal pillar can be reduced, and the coal mining amount is increased.
In the above technical solution, preferably, the pressure relief hole further includes: and the clay section is arranged between the hole sealing reinforcing section and the blasting pressure relief section and separates the hole sealing reinforcing section from the blasting pressure relief section.
In any of the above technical solutions, preferably, the length of the clay segment is greater than 100 mm.
In any of the above technical solutions, preferably, the pressure relief hole is formed by extending outward and downward from the junction between two side walls of the roadway and the bottom wall.
In any of the above solutions, preferably, the reinforcement material is concrete.
In any of the above technical solutions, preferably, a steel bar is provided in the reinforcing material.
In any one of the above technical solutions, preferably, the roadway structure further includes: and the reinforcing anchor is arranged in the hole sealing reinforcing section, and one end of the reinforcing anchor is positioned in the roadway.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic structural view of a roadway structure according to an embodiment of the present invention;
Fig. 2 is a schematic structural view of a roadway structure according to an embodiment of the present invention;
Fig. 3 is a partial structural schematic view of a roadway structure according to an embodiment of the present invention;
fig. 4 is a partial structural schematic diagram of a tunnel structure according to an embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 4 is:
The method comprises the following steps of 1 roadway, 2 pressure relief holes, 21 blasting pressure relief sections, 22 hole sealing reinforcing sections, 3 explosives, 4 detonators, 5 blasting buses, 6 clay sections, 7 reinforcing anchors and 8 reinforcing materials.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings, which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Some embodiments according to the invention are described below with reference to fig. 1 to 4.
As shown in fig. 1 to 4, an embodiment of the present invention provides a roadway structure, including: tunnel 1 and release hole 2, the both sides in tunnel 1 are located to the release hole 2 symmetry, and release hole 2 is filled with reinforced material 8 including blasting release section 21 and locating the hole sealing reinforced section 22 between tunnel 1 and the blasting release section 21, hole sealing reinforced section 22 intussuseption, is equipped with explosive 3 and at least one detonator 4 in the blasting release section 21.
After the roadway 1 is excavated, surrounding rocks are changed from a three-way stress state to a two-way stress state, the stress state of the surrounding rocks is redistributed, and a surrounding rock internal stress height concentrated zone appears, and the main reason for damaging the roadway 1 is that the surrounding rock internal stress height concentrated zone of the roadway 1 is concentrated.
in the scheme, after the explosive 3 is detonated by the detonator 4, the explosive 3 is in a condensed phase, so that the detonation process is high in pressure (the detonation of the condensed phase can reach 10 gigapascals), high in temperature (can reach 103K) and short in duration (can reach microsecond order). When blasting, the medium around the detonation wave interacts to generate shock wave or stress wave in the medium, which pushes the object to move, causing spalling, breaking and the like. Blasting is carried out in the closed space inside the deep rock stratum of the base angle of the roadway 1.
Through blasting in the blasting release section 21 of release hole 2, can make the elastic deformation that accumulates in the deep country rock release with the form of deformation fracture to lead to the stress redistribution of country rock deep, reform the broken zone, plastic region and elastic zone, and make the elastic zone of stress concentration shift to the country rock more depths, two sides and bottom plate shallow country rock are in the stress reduction district. Namely, after the pressure relief blasting, a low-stress pressure relief ring is formed in a certain range on the peripheral surface layer of the roadway 1, a self-bearing ring with concentrated stress is formed in the deep part of the surrounding rock, and the concentrated stress is mainly borne by the rock mass of the self-bearing ring. Therefore, the self-supporting force of the surrounding rock is fully exerted, and the stability of the pressure relief rock mass is guaranteed. Meanwhile, because the rock mass of the self-bearing ring is in the deep part of the surrounding rock and basically in a three-dimensional stress state, the stability is greatly improved.
Meanwhile, the explosive 3 explodes in the blasting pressure relief section 21 and can also compress the reinforcing material 8 in the hole sealing reinforcing section 22, so that the reinforcing material 8 is more tightly connected with the hole wall of the pressure relief hole 2 into a whole, and the strength of the whole rock body of the hole sealing reinforcing section is improved.
It should be noted that, in the scheme, elastic deformation accumulated in the deep surrounding rock can be released in a deformation and fracture mode, the width of the coal pillar can be reduced, the coal mining amount is increased, and the coal resource recovery rate is improved.
The detonator 4 is connected with the blasting bus 5, and the blasting bus 5 penetrates through the hole sealing reinforcing section 22 and extends into the roadway 1, so that the detonator 4 can be conveniently detonated.
In the above embodiment, preferably, the pressure relief hole 2 further includes: and the clay section 6 is arranged between the hole sealing reinforcing section 22 and the blasting pressure relief section 21, and separates the hole sealing reinforcing section 22 from the blasting pressure relief section 21.
In this scheme, clay section 6 separates hole sealing reinforcing section 22 and blasting release section 21, can prevent that the reinforcing material in the hole sealing reinforcing section from directly impacting the detonator to play the guard action, can also prevent simultaneously that there is ponding entering blasting release section 21 in the release hole 2, ensure to blast successfully.
In any of the above embodiments, preferably the length of the clay segment 6 is greater than 100 mm.
In this scheme, the length of clay section 6 is greater than 100mm, can reduce the broken possibility of clay section 6.
In any of the above embodiments, preferably, the pressure relief holes 2 are formed by extending outward and downward from the junctions of the two side walls and the bottom wall of the tunnel 1.
In this scheme, pressure relief vent 2 is outwards and downwardly extending by the both sides wall of tunnel 1 and diapire juncture and forms, and pressure relief vent 2 can carry out the release to the rock stress of tunnel 1 downside, eliminates the internal stress of partial rock, reduces the bellied possibility in tunnel 1 bottom.
In any of the above embodiments, preferably, the reinforcement material 8 is concrete.
In any of the above embodiments, it is preferable that reinforcing steel is provided in the reinforcing material 8.
In this scheme, set up the reinforcing bar in the reinforcing material 8, can improve the degree of difficulty of reinforcing material 8 deformation in the hole sealing reinforced section 22, be applicable to the great operating mode of 1 bottom deformation in tunnel.
In any of the above embodiments, preferably, the tunnel structure further includes: the reinforcing anchor 7 is arranged in the hole sealing reinforcing section 22, and one end of the reinforcing anchor 7 is positioned in the roadway 1.
In this scheme, consolidate anchor 7 and locate in hole sealing reinforced section 22 and consolidate anchor 7's one end and be located tunnel 1, can improve the degree of difficulty that 8 deformation of reinforcing material in hole sealing reinforced section 22, be applicable to the great operating mode of 1 bottom deformation in tunnel.
Wherein, preferably, be equipped with reinforcing bar and reinforced anchor 7 in the reinforced material 8 simultaneously, can further improve the degree of difficulty of reinforced material 8 deformation in hole sealing reinforced section 22, be applicable to the big operating mode of tunnel 1 bottom deformation.
Wherein, the reinforcing anchor comprises an anchor cable or an ultralong anchor rod.
It is worth to be noted that the reinforcing steel bars (or ultra-long anchor rods or anchor cables) are arranged in the reinforcing material 8, so that the surrounding rock deformation resistance strength of the reinforcing material and the rock body in the hole sealing reinforcing section 22 can be improved, and the method is suitable for the working condition that the roadway 1 deforms greatly.
In an embodiment of the present invention, the included angle between the pressure relief hole 2 and the horizontal plane is 45 ° so as to provide a supporting function through the hole sealing reinforced section 22 and simultaneously realize the pressure relief of the rock at the bottom of the tunnel 1.
The utility model discloses an in the embodiment, along the direction that tunnel 1 extends, the interval between two adjacent tunnels 1 is 1000mm to there is the not thorough possibility of release in rock existence that can reduce between two adjacent release holes 2.
Preferably, the pressure relief holes may be arranged in a single-row symmetrical manner, or in multiple-row symmetrical or asymmetrical manners according to stress variation.
for example, when the main stress direction of the structural stress is at an angle with respect to the roadway, the arrangement of the pressure relief holes 2 needs to be adjusted so that the angle of the pressure relief holes 2 corresponds to the main stress direction.
or when the local stress is too high to reach 150-200 kg/cm2, the single-row arrangement may not meet the support requirement, and a double-row or multi-row arrangement form needs to be considered.
In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.
in the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
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 (7)
1. A roadway structure, comprising:
The novel tunnel explosion-proof pressure relief structure comprises a tunnel (1) and pressure relief holes (2), wherein the pressure relief holes (2) are symmetrically arranged on two sides of the tunnel (1), each pressure relief hole (2) comprises an explosion pressure relief section (21) and a hole sealing reinforcing section (22) arranged between the tunnel (1) and the explosion pressure relief section (21), reinforcing materials (8) are filled in the hole sealing reinforcing section (22), and explosives (3) and at least one detonator (4) are arranged in the explosion pressure relief section (21).
2. The tunnel structure according to claim 1, characterized in that the pressure relief hole (2) further comprises:
the clay section (6) is arranged between the hole sealing reinforcing section (22) and the blasting pressure relief section (21) and separates the hole sealing reinforcing section (22) from the blasting pressure relief section (21);
the included angle between the pressure relief hole and the horizontal plane is 45 degrees.
3. The roadway structure of claim 2,
The length of the clay section (6) is more than 100 mm.
4. The roadway structure according to any one of claims 1 to 3,
The pressure relief hole (2) is formed by outwards and downwards extending the junction of the two side walls and the bottom wall of the roadway (1).
5. The roadway structure according to any one of claims 1 to 3,
The reinforcing material (8) is concrete.
6. The roadway structure of claim 5,
And reinforcing steel bars are arranged in the reinforcing material (8).
7. the lane structure of claim 5, further comprising:
The reinforcing anchor (7) is arranged in the hole sealing reinforcing section (22), and one end of the reinforcing anchor (7) is positioned in the roadway (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822254036.9U CN209742903U (en) | 2018-12-29 | 2018-12-29 | Tunnel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822254036.9U CN209742903U (en) | 2018-12-29 | 2018-12-29 | Tunnel structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209742903U true CN209742903U (en) | 2019-12-06 |
Family
ID=68704550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822254036.9U Active CN209742903U (en) | 2018-12-29 | 2018-12-29 | Tunnel structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209742903U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109630134A (en) * | 2018-12-29 | 2019-04-16 | 刘德成 | A kind of tunnel structure and the simultaneous drifting method for protecting support in high ground stress soft rock stress tunnel |
| CN111594120A (en) * | 2020-04-10 | 2020-08-28 | 中国恩菲工程技术有限公司 | High-stress underground pressure relief method |
-
2018
- 2018-12-29 CN CN201822254036.9U patent/CN209742903U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109630134A (en) * | 2018-12-29 | 2019-04-16 | 刘德成 | A kind of tunnel structure and the simultaneous drifting method for protecting support in high ground stress soft rock stress tunnel |
| CN109630134B (en) * | 2018-12-29 | 2023-11-24 | 刘德成 | Roadway structure and one-time roadway forming supporting method of high-ground-stress soft rock roadway |
| CN111594120A (en) * | 2020-04-10 | 2020-08-28 | 中国恩菲工程技术有限公司 | High-stress underground pressure relief method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104763425B (en) | Pressure relief presplitting blasting gob-side entry retaining pillar-free mining method | |
| CN101713290B (en) | Method for clearing rock burst of full-mine laneway deep in mine | |
| CN102778182B (en) | Beside-roadway topping pressure relief method of roadway driving along gob of small coal pillar influenced by dynamic pressure | |
| CN102536239B (en) | Long-wall working face coal pillar-free mining method | |
| CN110145326A (en) | Surrounding rock stability control method suitable for mine district main entry | |
| CN103557000B (en) | Method for preventing gob-side entry rock burst through side-drawing filling | |
| CN109973126A (en) | The double release constant resistance supporting surrounding rock stability control methods of fender gob side entry driving | |
| CN108661643A (en) | It a kind of coal working face end adopts return channel and cuts top release shield lane method | |
| CN103244180B (en) | Gob-side entry driving surrounding rock control method using remaining small pillars | |
| CN102678121A (en) | Layered top-controlling filling mining method for residual ores in deep hole in diskless area | |
| CN109630134B (en) | Roadway structure and one-time roadway forming supporting method of high-ground-stress soft rock roadway | |
| CN106677804B (en) | A kind of gob side entry retaining roadside support system and its construction method | |
| CN209742903U (en) | Tunnel structure | |
| CN112610251B (en) | Control method of coal mining roadway top plate | |
| CN108457651A (en) | A kind of coal mine roadside packing gob side entry retaining hydraulic splitting cuts top method | |
| CN103899329A (en) | Large-deformation broken surrounding rock roadway management method | |
| CN105019924A (en) | Strong roof support pier column and method for protecting section coal pillar | |
| CN103726872A (en) | Directional danger relieving method for coal mine strong mine pressure roadway | |
| CN103806917A (en) | Vertical strip roadway tunneling method | |
| CN107862106B (en) | Without coal column along empty caving at lane feasibility discrimination method | |
| CN110219650A (en) | A kind of environment remodeling stage deep hole afterwards filling mining method | |
| CN104790991A (en) | Mining roadway surrounding rock strong and long top anchoring technology | |
| CN105201510B (en) | A kind of creepage type bump preventing control method | |
| CN113202474B (en) | Blasting method for protecting eyebrow line by sectional caving method | |
| CN115711144A (en) | Novel supporting system for gob-side entry retaining |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |