CN212406753U - Novel three-shell roadway supporting structure - Google Patents
Novel three-shell roadway supporting structure Download PDFInfo
- Publication number
- CN212406753U CN212406753U CN202020635927.3U CN202020635927U CN212406753U CN 212406753 U CN212406753 U CN 212406753U CN 202020635927 U CN202020635927 U CN 202020635927U CN 212406753 U CN212406753 U CN 212406753U
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- shell
- tunnel
- roadway
- grouting
- deep
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- 239000011435 rock Substances 0.000 claims abstract description 41
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 35
- 239000010959 steel Substances 0.000 claims abstract description 35
- 239000011440 grout Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000036316 preload Effects 0.000 claims 1
- 239000002002 slurry Substances 0.000 claims 1
- 238000007569 slipcasting Methods 0.000 abstract description 13
- 238000010276 construction Methods 0.000 abstract description 12
- 238000009792 diffusion process Methods 0.000 abstract description 5
- 238000005065 mining Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- Lining And Supports For Tunnels (AREA)
Abstract
The utility model belongs to the technical field of mine tunnel is strutted, a novel three shell tunnel supporting construction is disclosed, this supporting construction includes the tunnel, and the section in tunnel is circular, still includes shell, mesochite and thick shell, and the shell includes the concatenation steel sheet that sets up along tunnel country rock inner wall, and has the clearance between the country rock inner wall in concatenation steel sheet and tunnel, and the mesochite fills including filling the seam body, stock and shallow portion slip casting body in the clearance, inside the stock passed the concatenation steel sheet and stretched into tunnel country rock, shallow portion slip casting body was followed stock department along the diffusion of country rock crack, and thick shell includes anchor rope and deep slip casting body, and inside the anchor rope passed the concatenation steel sheet and deep tunnel country rock, the diffusion of country rock crack was followed from the anchor rope department to deep slip casting body. The utility model discloses a supporting construction's structural stability is high, and the holding power is strong, has improved the security of the follow-up construction in tunnel simultaneously, the effectual current problem of strut not being applicable to extremely broken tunnel of having solved.
Description
Technical Field
The utility model relates to a mine tunnel supports technical field, specifically is a novel three-shell roadway support structure.
Background
Coal is one of important energy sources in China, for underground mining, a roadway is a necessary channel for underground coal mining, the premise that excavation and support stability of the roadway are guaranteed for safe production of mines is provided, and according to incomplete statistics, newly excavated roadways of coal mines in China are up to 12000km in total every year, so that the support structure of the roadway is more important. Along with large-scale mining and continuous increase of mining depth, the stress state of the surrounding rock of the roadway tends to worsen, the supporting difficulty is increased, the stability of the surrounding rock of the roadway and subsequent maintenance work are seriously damaged, and deep mining is restricted.
For an extremely-broken roadway, structural surfaces such as various joints, bedding, cracks and the like develop in surrounding rocks of the extremely-broken roadway, the surrounding rocks are broken and have poor stability, the conventional roadway arranged in an old roadway and a cross goaf is basically supported by a traditional anchor net or profile steel, broken stones fall due to the fact that the surrounding rocks are broken, a single protective iron net cannot bear the accumulated broken stones and cannot effectively support the broken stones, the on-site construction difficulty is high, particularly, holes cannot be formed in anchor rod drilling in some areas, anchor rod supporting cannot be adopted, and the engineering progress is seriously affected. Therefore, it is necessary to research a support which has high structural stability, is convenient to install and is suitable for extremely-broken roadways and common roadways.
SUMMERY OF THE UTILITY MODEL
The utility model provides a novel three-shell roadway supporting structure solves current roadway supporting structure simple, stability not high, can not carry out the problem of effectively strutting to utmost point broken tunnel.
The utility model provides a basic scheme is: the utility model provides a novel three shell tunnel supporting construction, includes the tunnel, and the section in tunnel is circular, still includes thin shell, mesochite and thick shell, the thin shell includes the concatenation steel sheet that sets up along tunnel country rock inner wall, and has the clearance between the country rock inner wall in concatenation steel sheet and tunnel, the mesochite is including filling the seam body, stock and shallow portion grout body, fill the seam body pack in the clearance, the stock passes the concatenation steel sheet and stretches into inside the tunnel country rock, the diffusion of country rock crack is followed in stock department to the shallow portion grout body, thick shell includes anchor rope and deep portion grout body, the anchor rope passes the concatenation steel sheet and deepens inside the tunnel country rock, the diffusion of country rock crack is followed in anchor rope department to the deep portion grout body.
The working principle of the basic scheme is as follows: the utility model discloses a set up the concatenation steel sheet along tunnel country rock inner wall, pour into shallow slip casting body to the broken crack of tunnel country rock through the stock, pour into the deep slip casting body into to the broken crack of tunnel country rock through the anchor rope, pour into between concatenation steel sheet and tunnel country rock inner wall and fill the seam body to through stock and anchor rope anchor concatenation steel sheet, form full section concatenation steel sheet supporting construction, extremely broken tunnel country rock is strutted.
The basic scheme has the beneficial effects that:
(1) the utility model discloses a supporting construction adopts the concatenation steel sheet to carry out full section to tunnel country rock inner wall and struts, and structural stability is high to form the inseparable bearing structure of circular shape, improved the holding power, improved the security of the follow-up construction in tunnel simultaneously, the effectual current problem of strutting the unsuitable broken tape tunnel of having solved.
(2) The utility model discloses a supporting construction when using the concatenation steel sheet to strut, the slip casting that combines the country rock is fixed with stock, anchor rope, realizes multiple the strutting to broken country rock, has improved the effect of strutting.
Further, the concatenation steel sheet is enclosed to close by a plurality of makeup boards and splices and forms, and two adjacent makeup boards pass through bolted connection, the makeup board is B type corrugated steel, and the material is Q345, and the thick 6.25mm that is thick.
Through the arrangement, the B-type corrugated steel is firm and durable, is simple to assemble, can realize the arched radian of the inner wall of the surrounding rock of the attaching roadway, and is high in construction speed and low in cost.
Further, the anchor rod is a grouting anchor rod, and the pretightening force applied to the grouting anchor rod is 60-80 kN; the anchor cable is a grouting anchor cable, and the pretightening force applied to the grouting anchor cable is 130-170 kN.
Through the setting, can realize improving the cementing power between the broken rock of tunnel country rock to the shallow layer and the deep slip casting of tunnel country rock, supplementary supporting construction is in order to improve the effect of strutting.
Further, the filling seam body is made of a high-water material, and the shallow grouting body and the deep grouting body are both chemical grout or cement grout.
Through the arrangement, the shallow shell and the middle shell are more fully and integrally combined, and the integrity and the strength of the supporting structure are improved.
Furthermore, the grouting pressure of the shallow grouting body is 3-5MPa, and the grouting pressure of the deep grouting body is 5-7 MPa.
Drawings
Fig. 1 is a schematic structural view of a novel three-shell roadway supporting structure of the utility model;
fig. 2 is a schematic structural view of the assembled board of the present invention.
Detailed Description
The following is further detailed by the specific embodiments:
reference numerals in the drawings of the specification include: the anchor bolt comprises a spliced plate 1, a filling joint body 2, an anchor rod 3, an anchor rope 4, shallow grouting bodies 5 and deep grouting bodies 6.
The embodiment is basically as shown in fig. 1 and fig. 2, a novel three-shell roadway supporting structure, including the roadway, the section in roadway is circular, still include thin shell, mesochite and thick shell, the thin shell includes the concatenation steel sheet that sets up along the tunnel country rock inner wall, the concatenation steel sheet is formed by fifteen pieces of assembly board 1 enclosed splice, and two adjacent assembly board 1 pass through bolted connection, bolt evenly distributed is at the edge of concatenation steel sheet, assembly board 1 is B type corrugated steel, the material is Q345, the thick 6.25mm of board, the specification of assembly board 1 is veneer length 1245mm, the width is 450mm, wave depth d is 45mm, wave pitch p is 178mm, wave form inner arc radius R is 16mm, both sides turn-ups height L is 45 mm.
Have the clearance between the country rock inner wall in concatenation steel sheet and tunnel, the mesochite is including filling the seam body 2, stock 3 and shallow portion slip casting body 5, fill the grout hole that seam body 2 was reserved through the makeup board 1 and fill in the clearance, inside stock 3 passed the concatenation steel sheet and stretched into the tunnel country rock, stock 3 was slip casting stock 3, the pretightning force of applying to it was 80kN, shallow portion slip casting body 5 was followed 3 injections of stock and is followed the diffusion of country rock crack, the slip casting pressure of shallow portion slip casting body 5 is 5 MPa.
The thick shell comprises an anchor cable 4 and a deep grouting body 6, the anchor cable 4 penetrates through the spliced steel plate and goes deep into the surrounding rock of the roadway, the anchor cable 4 is the grouting anchor cable 4, the applied pretightening force to the anchor cable 4 is 170kN, the deep grouting body 6 is injected from the anchor cable 4 and diffuses along the cracks of the surrounding rock, and the grouting pressure of the deep grouting body 6 is 7 MPa.
Wherein, the filling joint body 2 is made of high-water material, and the shallow grouting body 5 and the deep grouting body 6 are both chemical grout or cement grout.
Grouting holes are reserved in the spliced steel plates, the diameter of each grouting hole is 50mm, and the row spacing between the grouting holes is 2490 multiplied by 1800 mm.
The specific implementation process comprises the following steps: according to the net section size in tunnel, the hair terminal surface diameter that the design tunnel was tunneled is 5950mm to guarantee that fifteen pieces of built-up plate 1 can enclose and close the concatenation, and set up the preformed hole along the section interval that fifteen pieces of built-up plate 1 enclose synthetic virtual cylinder, and the preformed hole interval that is located tunnel section first half is equipped with twelve, and the preformed hole interval that is located the tunnel lower half is equipped with five, and wherein, the preformed hole can not set up in the concatenation department of built-up plate.
The method comprises the steps that a spliced plate 1 parallel to the axial center of a roadway is installed in the center of an arch top at a position 40-60m behind a heading machine, the center of the spliced plate 1 is parallel to the axial center of the roadway, a single wood pillar is erected under the spliced plate 1 in the center of the arch top, four spliced plates 1 are sequentially installed along two sides of the spliced plate 1 in the center of the arch top, the installation sequence is firstly left and then right, firstly up and down, two adjacent spliced plates 1 are connected through bolts, the diameter of each bolt is 2.5cm, the length of each bolt is 4cm, the bolts are evenly distributed on the edges of the spliced steel plates, anchor rods 3 are installed at reserved holes of the spliced plates 1 in the upper half part of the roadway, and the single pillars are removed.
Excavating the lower half part of the roadway section, mounting the residual assembled plates 1 in the order of first left and then right, and first up and down, mounting anchor rods 3 at reserved holes of the assembled plates 1 at the lower half part of the roadway section, and mounting anchor cables 4 of the full-section of the spliced steel plates; and mounting the anchor cable 4 with the full section of the spliced steel plate to form a full-section spliced steel plate supporting structure, and completing grouting of the filling joint body 2 through a reserved grouting hole after 5-10 days of roadway formation. And then, after 60 days after the filling seam body 2 is grouted, the full-section shallow grouting body is grouted through the anchor rod 3, and the full-section deep grouting body is grouted through the anchor cable 4. Wherein, the grouting sequence of the shallow grouting body and the deep grouting body is gradually grouting from bottom to top.
The above embodiments of the present invention are only examples, and the common knowledge of the known specific structures and characteristics in the schemes is not described too much, it should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, and these should be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020635927.3U CN212406753U (en) | 2020-04-24 | 2020-04-24 | Novel three-shell roadway supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020635927.3U CN212406753U (en) | 2020-04-24 | 2020-04-24 | Novel three-shell roadway supporting structure |
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| Publication Number | Publication Date |
|---|---|
| CN212406753U true CN212406753U (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020635927.3U Expired - Fee Related CN212406753U (en) | 2020-04-24 | 2020-04-24 | Novel three-shell roadway supporting structure |
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| Country | Link |
|---|---|
| CN (1) | CN212406753U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111456766A (en) * | 2020-04-24 | 2020-07-28 | 河北工程大学 | Novel three-shell roadway supporting structure and construction method |
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2020
- 2020-04-24 CN CN202020635927.3U patent/CN212406753U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111456766A (en) * | 2020-04-24 | 2020-07-28 | 河北工程大学 | Novel three-shell roadway supporting structure and construction method |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210126 |
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| CF01 | Termination of patent right due to non-payment of annual fee |