CN103498691B - A kind of mining many steel strand combination supporting device and method - Google Patents
A kind of mining many steel strand combination supporting device and method Download PDFInfo
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- CN103498691B CN103498691B CN201310396221.0A CN201310396221A CN103498691B CN 103498691 B CN103498691 B CN 103498691B CN 201310396221 A CN201310396221 A CN 201310396221A CN 103498691 B CN103498691 B CN 103498691B
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Abstract
<b> the present invention relates to a kind of mining many steel strand combination supporting device, the front end of steel strand is provided with guiding cap, the center of steel strand is provided with Grouting Pipe, the front end of Grouting Pipe to guiding cap top between be provided with stifled slurry round steel, the tube wall of Grouting Pipe is distributed with slurry outlet, the periphery of steel strand is provided with garter spring from top to bottom, the steel strand periphery being positioned at suspension device free segment coincide and is set with steel strand sleeve pipe, the steel strand periphery being positioned at suspension device seal section coincide and is set with auricle formula seal rubber sleeve and round platform sealing of hole gum cover, the tail end of steel strand is fastened on supporting plate by porous lockset, intermediate plate is provided with between steel strand and porous lockset.This suspension device can improve tension, the shear strength of support unit largely, also the supporting capacity of deep stabilizing surrounding rock can better be transferred, this suspension device structure is simple, easy for installation, brings great convenience to the reinforcement of the large relaxation zone rock stratum of mine.</b>
Description
Technical field
the present invention relates to a kind of suspension device, control one mining many steel strand combination supporting device of deformation of the surrounding rock in tunnel especially by steel strand combination supporting.
Background technology
current domestic mine mainly adopts to be reinforced tunnel deep wall rock by common mining single steel strand anchor cable or hollow grouting cable anchor.Common mining single anchor cable passes through end resin anchoring to country rock with higher pretightning force, the supporting capacity of transfer deep wall rock.Hollow grouting cable anchor generally first carries out end resin anchoring, carries out grouting and reinforcing again and realize full length fastening after stretch-draw, has high pre-stress and full length fastening characteristic concurrently.
but with the deepening of mining level, deep tunnel residual stress, adopt the conditions such as disturbance by force under, surrouding rock deformation show obvious soft rock long time large deformation characteristic, relaxation zone obviously increases (locally exceeding 5m), and now common mining single anchor cable and hollow grouting cable anchor will show deficiency:
1. the length of common mining single anchor cable and hollow grouting cable anchor is generally at 6-7m, and under large relaxation zone condition, the anchor cable of finite length can not anchor into deep and comparatively stablize in rock stratum to give full play to its supporting capacity;
2. consider that tension, the shear strength of single steel strand are lower, under the compound influence of the stress of primary rock, tectonic stress, mining induced stress, common single Mine anchorage cable and hollow grouting cable anchor easily carried limit and caused and break, cut off;
3. though hollow grouting cable anchor can carry out grouting and reinforcing to the country rock in certain limit, form full length fastening after slip casting, the overall limit elongation of anchor cable reduces, and can not adapt to the continuous deformation characteristic of deep weak surrounding rock;
4. the resistance to shock loads ability of common mining single anchor cable and hollow grouting cable anchor, incompatible with the Burst Tendency of deep mining.
Summary of the invention
in order to solve the problem that existing mining single steel strand anchor cable or hollow grouting cable anchor can not be reinforced large relaxation zone rock stratum, the invention provides a kind of mining many steel strand combination supporting device, this suspension device can improve tension, the shear strength of support unit largely, also the supporting capacity of deep stabilizing surrounding rock can better be transferred, the Burst Tendency of deep mining and the continuous deformation characteristic of deep wall rock can be adapted to while grouting and reinforcing is carried out to country rock, and this suspension device structure is simple, easy for installation, there is stronger shock loading ability; By carrying out synchronous tension to steel strand, making steel strand uniform stressed, being conducive to the stability of supporting and protection structure, bring great convenience to the reinforcement of the large relaxation zone rock stratum of mine.
the technical solution adopted for the present invention to solve the technical problems is: this suspension device is divided into anchoring section from top to bottom, free segment, seal section and revealed section, this suspension device comprises guiding cap, steel strand, stifled slurry round steel, Grouting Pipe, slurry outlet, garter spring, steel strand sleeve pipe, auricle formula seal rubber sleeve, round platform sealing of hole gum cover, supporting plate, fixing hole, intermediate plate and porous lockset, the front end of described steel strand is provided with the guiding cap of taper, the center of steel strand is provided with Grouting Pipe, the front end of Grouting Pipe to guiding cap top between be provided with stifled slurry round steel, the tube wall of Grouting Pipe is distributed with slurry outlet, the periphery of steel strand is provided with 2-4 garter spring from top to bottom, steel strand tightly bind round around Grouting Pipe by garter spring, the steel strand periphery being positioned at suspension device free segment coincide and is set with steel strand sleeve pipe, the steel strand periphery being positioned at suspension device seal section coincide and is set with auricle formula seal rubber sleeve and round platform sealing of hole gum cover, the tail end of steel strand is fastened on supporting plate by porous lockset, supporting plate has circular fixing hole, supporting plate is fixed by setscrew during constructability, intermediate plate is provided with between steel strand and porous lockset.
described anchoring depth L1, freedom length L2, seal section length L3 and revealed section length L4 meet relational expression: 7m < L1+L2+L3+L4 < 13m, L1 ≈ (L1+L2+L3+L4)/3,150mm < L3 < 200mm, 150mm < L4 < 250mm.
described steel strand are parallel to be arranged in around Grouting Pipe uniformly, and steel strand adopt mining steel twisted wire, and diameter is 15.24mm-17.8mm.
described stifled slurry round steel is smooth bar, and its diameter and Grouting Pipe internal diameter match, and Grouting Pipe is plastic pipe.
described slurry outlet is distributed in noncontact place of steel strand and Grouting Pipe, the distribution of slurry outlet by free segment to anchoring section density gradually.
described auricle formula seal rubber sleeve and round platform sealing of hole gum cover all have good elasticity, and all punching has slip casting pore I and steel strand hole I, and slip casting pore I size is less than the external diameter of Grouting Pipe, so that permanent position; Steel strand hole I size is less than the diameter of steel strand, so that permanent position, steel strand hole I is uniformly distributed in around slip casting pore I.
described supporting plate upper punch has slip casting pore II and steel strand hole II, and the size of slip casting pore II is greater than the external diameter of Grouting Pipe, to install; The size in steel strand hole II is greater than the diameter of steel strand, to install, steel strand hole II is uniformly distributed in slip casting pore II around.
this is mining, and its construction method of many steel strand combination supporting device is:
1. the design of more than steel strand combination supporting device and processing; According to waiting the actual state of reinforcing roadway surrounding rock, determine the radical of required drilling depth L, required steel strand, and then the diameter R of construction drill is jointly determined according to steel strand radical and each drill bit of drilling machine size model, bore diameter R should get little under the prerequisite met the demands as far as possible; Design according to drilling depth L and diameter R and process corresponding many steel strand combination supporting device, each size meets: 7m < L1+L2+L3+L4 < 13m, L1 ≈ (L1+L2+L3+L4)/3,150mm < L3 < 200mm, 150mm < L4 < 250mm, L-(L1+L2+L3) ≈ 100mm;
2. the installation of drilling construction and many steel strand combination supporting device; According to size and the orientation construction drill of design, after drilling construction completes, guiding cap is stretched in boring, manpower is relied on progressively to be pushed at the bottom of hole by many steel strand combination supporting device, and auricle formula seal rubber sleeve and round platform sealing of hole gum cover are clamp-oned in hole, make the large end face of round platform sealing of hole gum cover concordant with country rock surface, rapidly supporting plate is close to country rock through the exposed junction of steel strand, supporting plate is fixed to install setscrew at the country rock place construction drill corresponding with fixing hole, during this period, temporary lining equipment should be utilized to withstand supporting plate, in case device landing;
3. slip casting; Grouting pipeline and Grouting Pipe connected and start slip casting, grouting pressure stops slip casting more than after 6MPa;
4. stretch-draw and locking; After slip casting completes one week, by anchor cable tensioning machine tool, synchronous tension is carried out to steel strand, lock steel strand by clip type porous lockset simultaneously.
the invention has the beneficial effects as follows, this suspension device can improve tension, the shear strength of support unit largely, also the supporting capacity of deep stabilizing surrounding rock can better be transferred, the Burst Tendency of deep mining and the continuous deformation characteristic of deep wall rock can be adapted to while grouting and reinforcing is carried out to country rock, and this suspension device structure is simple, easy for installation, there is stronger shock loading ability; By carrying out synchronous tension to steel strand, making steel strand uniform stressed, being conducive to the stability of supporting and protection structure, bring great convenience to the reinforcement of the large relaxation zone rock stratum of mine.
Accompanying drawing explanation
below in conjunction with accompanying drawing and example, the invention will be further described.
fig. 1 is structural principle schematic diagram of the present invention.
in Fig. 1,1. guiding cap, 2. steel strand, 3. stifled slurry round steel, 4. Grouting Pipe, 5. slurry outlet, 6. garter spring, 7. steel strand sleeve pipe, 8. hole wall, 9. auricle formula seal rubber sleeve, 10. round platform sealing of hole gum cover, 11. supporting plates, 12. fixing holes, 13. intermediate plates, 14. porous locksets.
Detailed description of the invention
in FIG, this suspension device is divided into anchoring section from top to bottom, free segment, seal section and revealed section, this suspension device comprises guiding cap 1, steel strand 2, stifled slurry round steel 3, Grouting Pipe 4, slurry outlet 5, garter spring 6, steel strand sleeve pipe 7, auricle formula seal rubber sleeve 9, round platform sealing of hole gum cover 10, supporting plate 11, fixing hole 12, intermediate plate 13 and porous lockset 14, the front end of described steel strand 2 is provided with the guiding cap 1 of taper, the center of steel strand 2 is provided with Grouting Pipe 4, the front end of Grouting Pipe 4 to guiding cap 1 top between be provided with stifled slurry round steel 3, the tube wall of Grouting Pipe 4 is distributed with slurry outlet 5, the periphery of steel strand 2 is provided with 2-4 garter spring 6 from top to bottom, steel strand 2 tightly bind round around Grouting Pipe 4 by garter spring 6, steel strand 2 periphery being positioned at suspension device free segment coincide and is set with steel strand sleeve pipe 7, steel strand 2 periphery being positioned at suspension device seal section coincide and is set with auricle formula seal rubber sleeve 9 and round platform sealing of hole gum cover 10, the tail end of steel strand 2 is fastened on supporting plate 11 by porous lockset 14, supporting plate 11 has circular fixing hole 12, supporting plate 11 is fixed by setscrew during constructability, intermediate plate 13 is provided with between steel strand 2 and porous lockset 14.
described anchoring depth L1, freedom length L2, seal section length L3 and revealed section length L4 meet relational expression: 7m < L1+L2+L3+L4 < 13m, L1 ≈ (L1+L2+L3+L4)/3,150mm < L3 < 200mm, 150mm < L4 < 250mm.
described steel strand 2 are parallel to be arranged in around Grouting Pipe 4 uniformly, and steel strand 2 adopt mining steel twisted wire, and diameter is 15.24mm-17.8mm.
described stifled slurry round steel 3 is smooth bar, and its diameter and Grouting Pipe 4 internal diameter match, and Grouting Pipe 4 is plastic pipe.
described slurry outlet 5 is distributed in noncontact place of steel strand 2 and Grouting Pipe 4, the distribution of slurry outlet 5 by free segment to anchoring section density gradually.
described auricle formula seal rubber sleeve 9 and round platform sealing of hole gum cover 10 all have good elasticity, and all punching has slip casting pore I and steel strand hole I, and slip casting pore I size is less than the external diameter of Grouting Pipe 4, so that permanent position; Steel strand hole I size is less than the diameter of steel strand 2, so that permanent position, steel strand hole I is uniformly distributed in around slip casting pore I.
described supporting plate 11 upper punch has slip casting pore II and steel strand hole II, and the size of slip casting pore II is greater than the external diameter of Grouting Pipe 4, to install; The size in steel strand hole II is greater than the diameter of steel strand 2, to install, steel strand hole II is uniformly distributed in slip casting pore II around.
this is mining, and its construction method of many steel strand combination supporting device is:
1. the design of more than steel strand combination supporting device and processing; According to waiting the actual state of reinforcing roadway surrounding rock, determine the radical of required drilling depth L, required steel strand 2, and then the diameter R of construction drill is jointly determined according to steel strand 2 radical and each drill bit of drilling machine size model, bore diameter R should get little under the prerequisite met the demands as far as possible; Design according to drilling depth L and diameter R and process corresponding many steel strand combination supporting device, each size meets: 7m < L1+L2+L3+L4 < 13m, L1 ≈ (L1+L2+L3+L4)/3,150mm < L3 < 200mm, 150mm < L4 < 250mm, L-(L1+L2+L3) ≈ 100mm;
2. the installation of drilling construction and many steel strand combination supporting device, according to size and the orientation construction drill of design, after drilling construction completes, guiding cap 1 is stretched in boring, manpower is relied on progressively to be pushed at the bottom of hole by many steel strand combination supporting device, and auricle formula seal rubber sleeve 9 and round platform sealing of hole gum cover 10 are clamp-oned in hole, make the large end face of round platform sealing of hole gum cover 10 concordant with country rock surface, rapidly supporting plate 11 is close to country rock through the exposed junction of steel strand 2, supporting plate 11 is fixed to install setscrew at the country rock place construction drill corresponding with fixing hole 12, during this period, temporary lining equipment should be utilized to withstand supporting plate 11, in case device landing,
3. slip casting; Grouting pipeline and Grouting Pipe 4 are connected and start slip casting, grouting pressure stops slip casting more than after 6MPa;
4. stretch-draw and locking; After slip casting completes one week, by anchor cable tensioning machine tool, synchronous tension is carried out to steel strand 2, lock steel strand 2 by clip type porous lockset 14 simultaneously.
Claims (5)
1. mining many steel strand combination supporting device, this suspension device is divided into anchoring section from top to bottom, free segment, seal section and revealed section, this suspension device comprises guiding cap (1), steel strand (2), stifled slurry round steel (3), Grouting Pipe (4), slurry outlet (5), garter spring (6), steel strand sleeve pipe (7), auricle formula seal rubber sleeve (9), round platform sealing of hole gum cover (10), supporting plate (11), fixing hole (12), intermediate plate (13) and porous lockset (14), it is characterized in that, the front end of described steel strand (2) is provided with the guiding cap (1) of taper, the center of steel strand (2) is provided with Grouting Pipe (4), stifled slurry round steel (3) is provided with between the top of front end to guiding cap (1) of Grouting Pipe (4), the tube wall of Grouting Pipe (4) is distributed with slurry outlet (5), the periphery of steel strand (2) is provided with 2-4 garter spring (6) from top to bottom, many steel strand (2) tightly bind round around Grouting Pipe (4) by garter spring (6), steel strand (2) periphery being positioned at suspension device free segment coincide and is set with steel strand sleeve pipe (7), steel strand (2) periphery being positioned at suspension device seal section coincide and is set with auricle formula seal rubber sleeve (9) and round platform sealing of hole gum cover (10), the tail end of steel strand (2) is fastened on supporting plate (11) by porous lockset (14), supporting plate (11) has circular fixing hole (12), supporting plate (11) is fixed by setscrew during constructability, intermediate plate (13) is provided with between steel strand (2) and porous lockset (14).
2. one according to claim 1 mining many steel strand combination supporting device, it is characterized in that, described anchoring depth L1, freedom length L2, seal section length L3 and revealed section length L4 meet relational expression: 7m < L1+L2+L3+L4 < 13m, L1 ≈ (L1+L2+L3+L4)/3,150mm < L3 < 200mm, 150mm < L4 < 250mm.
3. one according to claim 1 mining many steel strand combination supporting device, is characterized in that, described steel strand (2) are parallel is arranged in Grouting Pipe (4) around uniformly, and steel strand (2) adopt mining steel twisted wire, and diameter is 15.24mm-17.8mm.
4. one according to claim 1 mining many steel strand combination supporting device, is characterized in that, described stifled slurry round steel (3) is smooth bar, and its diameter and Grouting Pipe (4) internal diameter match, and Grouting Pipe (4) is plastic pipe.
5. one according to claim 1 mining many steel strand combination supporting device, it is characterized in that, described slurry outlet (5) is distributed in noncontact place of steel strand (2) and Grouting Pipe (4), the distribution of slurry outlet (5) by free segment to anchoring section density gradually.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310396221.0A CN103498691B (en) | 2013-09-04 | 2013-09-04 | A kind of mining many steel strand combination supporting device and method |
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| CN201310396221.0A CN103498691B (en) | 2013-09-04 | 2013-09-04 | A kind of mining many steel strand combination supporting device and method |
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| CN104500045B (en) * | 2014-12-15 | 2018-03-27 | 中铁第四勘察设计院集团有限公司 | A kind of geothermal test method of deep cavern internal drilling slip casting |
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| US5984588A (en) * | 1997-03-07 | 1999-11-16 | Marcegaglia S.P.A. | Method for the stabilization of rock masses and related stabilization element |
| CN2504316Y (en) * | 2001-09-18 | 2002-08-07 | 柳州市建筑机械总厂 | Pile plate anchorage cable |
| CN101148877A (en) * | 2007-10-16 | 2008-03-26 | 中国京冶工程技术有限公司 | Multistage bag-type compression anchor bar |
| CN101798812A (en) * | 2010-04-19 | 2010-08-11 | 北京科技大学 | Double anchoring section prestressed anchoring system with three-layer protection and anchoring method thereof |
| CN202144593U (en) * | 2011-07-04 | 2012-02-15 | 北京鑫实路桥建设有限公司 | Bundling prestressing steel strand anchor cable for strengthening road rock slope |
| CN202926355U (en) * | 2012-10-31 | 2013-05-08 | 于守东 | Hollow grouting anchor cable for mine |
-
2013
- 2013-09-04 CN CN201310396221.0A patent/CN103498691B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5984588A (en) * | 1997-03-07 | 1999-11-16 | Marcegaglia S.P.A. | Method for the stabilization of rock masses and related stabilization element |
| CN2504316Y (en) * | 2001-09-18 | 2002-08-07 | 柳州市建筑机械总厂 | Pile plate anchorage cable |
| CN101148877A (en) * | 2007-10-16 | 2008-03-26 | 中国京冶工程技术有限公司 | Multistage bag-type compression anchor bar |
| CN101798812A (en) * | 2010-04-19 | 2010-08-11 | 北京科技大学 | Double anchoring section prestressed anchoring system with three-layer protection and anchoring method thereof |
| CN202144593U (en) * | 2011-07-04 | 2012-02-15 | 北京鑫实路桥建设有限公司 | Bundling prestressing steel strand anchor cable for strengthening road rock slope |
| CN202926355U (en) * | 2012-10-31 | 2013-05-08 | 于守东 | Hollow grouting anchor cable for mine |
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Inventor after: Li Guichen Inventor after: Zhang Nong Inventor after: Sun Yuantian Inventor after: Gao Kai Inventor after: Han Changliang Inventor after: Sun Hui Inventor after: Wei Yinghao Inventor after: Jiang Zuohan Inventor before: Li Guichen Inventor before: Sun Hui Inventor before: Wei Yinghao Inventor before: Zhang Nong Inventor before: Jiang Zuohan Inventor before: Han Changliang |
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