CN101949294A - Prestressed full-length anchorage support method - Google Patents
Prestressed full-length anchorage support method Download PDFInfo
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- CN101949294A CN101949294A CN 201010256155 CN201010256155A CN101949294A CN 101949294 A CN101949294 A CN 101949294A CN 201010256155 CN201010256155 CN 201010256155 CN 201010256155 A CN201010256155 A CN 201010256155A CN 101949294 A CN101949294 A CN 101949294A
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- anchor pole
- prestressing force
- laneway
- boring
- support
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Abstract
The invention discloses a prestressed full-length anchorage support method which comprises the following steps: (1) laying a metal mesh on the top surface at the top part of a laneway; and arranging a W steel strip or a steel bar supporting beam under the metal mesh; (2) drilling a hole at the top part of the laneway, and clearing the hole; (3) sequentially arranging a tray, a spherical pad, a friction-reducing piece and a nut on an anchor rod; and (4) arranging a low-viscosity resin cartridge into the drilled hole, then inserting the top end of the anchor rod into the drilled hole, stirring the resin cartridge arranged into the drilled hole, and fastening a nut after stopping stirring; and the prestressed full-length anchorage support method is characterized in that the low-viscosity resin cartridge adopts the fast and slow solidification resin cartridge combined process. The adoption of the method can lead the anchor rod to be very sensitive to deformation and layer separation of surrounding rock, inhibit the layer separation and sliding of the surrounding rock in time, reduce the support density, solve the difficult problem of deep part high stress laneway support, improve the laneway support effect and realize rapid excavation of the laneway.
Description
Technical field
The invention belongs to the roadway support technology, relate in particular to a kind of prestressing force full length fastening anchor rod support method in the rapid construction of mine deep tunnel,
Background technology
The colliery tunnel support technology is the key technology in the coal mining.Keep adjoining rock stability, control roadway deformation and destruction are the necessary conditions that realizes mine safety, High-efficient Production.Along with mine develops both in depth and in breadth, the roadway support problem shows more and more outstandingly.BOLTING TECHNOLOGY TO COAL ROADWAY development has in recent years become the supporting technology that mine is realized the high-yield and high-efficiency indispensability rapidly.
At present, highland, domestic most of deep presses the tunnel to adopt secondary supporting method, i.e. roadway support is carried out at twice, and once supporting allows the tunnel certain deformation to be arranged with release pressure under the prerequisite that keeps stability of the roadway; Secondary supporting is implemented in the back at regular intervals, keeps the long-term stability in tunnel.But, in dynamic pressure influence area, deep, place such as structure press belt etc., adopt problems such as still occurring deformation failure behind the secondary supporting, even need three times, four times supportings, what went round and began again in the tunnel destroys, and surrouding rock deformation can not get effective control for a long time.Though, multiple roadway support form is arranged at present, all there is deficiency in various support forms.Press the tunnel for the highland, deep, also lack effective supporting method, cause roadway deformation and destroy acutely, need repeatedly keep in repair and overhaul.Not only support cost is very high, and driving speed is low, and brings a lot of potential safety hazards, seriously restricts the quick propelling of coal-face and the raising of mine output and benefit.
Traditional anchor pole only applies less pretightning force, and array pitch is less between anchor pole; The anchor cable diameter is little, intensity is low, elongation per unit length is low, and is poor with the boring matching, often occurs that anchor cable is broken or whole the slip; Anchor pole on the unit area, anchor cable number are many, and an array pitch is little, and support density is big, has a strong impact on tunnelling speed, cause the digging anxiety that continues.Above-mentioned phenomenon has had a strong impact on roadway support effect and safe coefficient.
At present, along with the increase of China's pit mining degree of depth, working face equipment maximizes in addition, and drift section is increasing, existing anchor rod support method can not effectively have been controlled the deflection of roadway surrounding rock, particularly supporting difficult problems such as some high buried depths, high-ground stress, large deformation.
Summary of the invention
Purpose of the present invention is exactly to overcome the deficiency that existing anchor rod support method exists, provide a kind of prestressing force full length fastening once supporting method, to solve the problem that array pitch is less between the anchor pole that existing bolt support technology exists, driving speed is slow, can not effectively control the deformation of the surrounding rock in tunnel under the condition of high ground stress of deep.
With solution prior art problem, the technical solution used in the present invention is to achieve these goals:
1, a kind of prestressing force full length fastening supporting method comprises following processing step:
(1) at the end face shop at top, tunnel wire lath; W steel band or reinforcing bar joist are set under wire lath;
(2) in the boring of top, tunnel, clear hole;
(3) on anchor pole, load onto pallet, ball pad, antifriction pad, nut successively;
(4) the low-viscosity resin explosive roll is packed in the boring, insert the top of anchor pole in the boring subsequently and the boring of packing in resin explosive roll stir, after stopping to stir, clamp nut;
Its activities is: described low-viscosity resin explosive roll is to adopt the combination of speed cured resin powder stick; Ultrafast anchoring resin explosive roll is installed earlier, is installed again and solidify powder stick at a slow speed; Then, anchor pole stir powder stick finish treat ultrafast anchoring hardening of resin after, clamp nut also applies prestressing force to anchor pole, behind the powder stick intact prestressing force to be applied gelatification takes place just at a slow speed, so just forms the full length fastening of anchor rod prestress.Fast the powder stick effect applies prestressing force to anchor pole, and forms the prestressed structure of anchor pole, and its essence is exactly that total length realizes full length fastening when applying big pretightning force.
The invention has the beneficial effects as follows:
By adopting prestressing force full length fastening supporting method, make anchor pole very sensitive to surrouding rock deformation and absciss layer, can in time suppress surrounding rock separation layer and slip.Under the condition that guarantees roadway support effect and safety, reduce support density.Adopt prestressing force full length fastening supporting method, solve a deep high stress tunnel supporting difficult problem, improve the roadway support effect.The present invention also can be applicable to the tunnel and the chamber support of departments such as other mining, building, water conservancy, military project.
Description of drawings
Fig. 1 is the longitudinal profile schematic diagram of the present invention at top, tunnel embodiment.
The specific embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is further described.
As shown in Figure 1, be the longitudinal profile schematic diagram of the embodiment of the invention.Prestressing force full length fastening supporting method of the present invention comprises following processing step:
(1) at the end face shop at top, tunnel 3 wire lath 4; Divide into W steel band or reinforcing bar joist at wire lath 4;
(2) bore a guard aperture 10 at the top, tunnel, and clear hole;
(3) load onto pallet 6, ball pad 7, antifriction pad 8 successively in the lower end (having external screw thread) of anchor pole 2, and screw on nut 9;
(4) with in low-viscosity resin explosive roll (among Fig. 1 shown in the mark 1 is resin after the solidifying) guard aperture 10 of packing into, subsequently the top of anchor pole 2 is inserted in the guard aperture 10, agitating resin powder stick 1 stopped to stir to the stipulated time, waited for about about 1 minute, tightened nut with pneumatic impact wrench again.
Critical process in above-mentioned activities is:
1, described low-viscosity resin explosive roll is to adopt the combination of speed cured resin powder stick, and its activities is: ultrafast anchoring resin explosive roll is installed earlier, is installed and solidify powder stick at a slow speed; Then, after anchor pole stirs powder stick and finishes ultrafast anchoring resin explosive roll and solidify, apply prestressing force, behind the powder stick intact prestressing force to be applied gelatification takes place just at a slow speed with regard to clamp nut and to anchor pole.So just form the full length fastening of anchor rod prestress, fast the powder stick effect applies prestressing force to anchor pole, and forms the prestressed structure of anchor pole, and its essence is exactly that total length realizes full length fastening when applying big pretightning force.
2, use the pretension facility that anchor pole is applied prestressing force, prestressing force will reach 30%～50% of anchor rod body yield strength, realize the high prestressing force of anchor pole.
Claims (2)
1. prestressing force full length fastening supporting method comprises following processing step:
(1) at the end face shop at top, tunnel wire lath; W steel band or reinforcing bar joist are set under wire lath;
(2) in the boring of top, tunnel, clear hole;
(3) on anchor pole, load onto pallet, ball pad, antifriction pad, nut successively;
(4) the low-viscosity resin explosive roll is packed in the boring, insert the top of anchor pole in the boring subsequently and the boring of packing in resin explosive roll stir, after stopping to stir, clamp nut;
It is characterized in that: described low-viscosity resin explosive roll is to adopt the combination of speed cured resin powder stick; Ultrafast anchoring resin explosive roll is installed earlier, is installed again and solidify powder stick at a slow speed; Stir at anchor pole that powder stick is finished, after ultrafast anchoring resin explosive roll solidifies, clamp nut also applies prestressing force to anchor pole; Behind the powder stick intact prestressing force to be applied gelatification takes place just at a slow speed.
2. prestressing force full length fastening supporting method according to claim 1 is characterized in that: described clamp nut to anchor pole apply prestressing force reach anchor pole body of rod yield strength 30%～50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010256155 CN101949294A (en) | 2010-08-13 | 2010-08-13 | Prestressed full-length anchorage support method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010256155 CN101949294A (en) | 2010-08-13 | 2010-08-13 | Prestressed full-length anchorage support method |
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| CN101949294A true CN101949294A (en) | 2011-01-19 |
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| CN 201010256155 Pending CN101949294A (en) | 2010-08-13 | 2010-08-13 | Prestressed full-length anchorage support method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337912A (en) * | 2011-10-17 | 2012-02-01 | 新汶矿业集团有限责任公司华丰煤矿 | Rapid anchoring method for coal mine roadway anchor rod |
| CN102680327A (en) * | 2012-05-07 | 2012-09-19 | 天地科技股份有限公司 | Detection method and detection station for tail deformation of anchor rod |
| WO2014146392A1 (en) * | 2013-03-22 | 2014-09-25 | 中国矿业大学 | Paste fixed-length anchoring supporting method |
| WO2015103862A1 (en) * | 2014-01-09 | 2015-07-16 | 中国矿业大学 | Method for supporting by means of full-length pre-stressed anchorage with paste material being first poured and last anchored |
| CN105257325A (en) * | 2015-11-02 | 2016-01-20 | 新汶矿业集团有限责任公司协庄煤矿 | Anchor rod anchoring device for surrounding rock of roadway and anchoring method of anchor rod anchoring device |
| CN106640160A (en) * | 2016-10-24 | 2017-05-10 | 河南理工大学 | Left-handed longitudinal-bar-free full-length high-prestress anchor rod and construction technique thereof |
| CN107677167A (en) * | 2017-10-23 | 2018-02-09 | 山东建筑大学 | Can explosion reaming and the soft stratum prestress anchoraging device and technique filled automatically |
| CN110080802A (en) * | 2019-04-03 | 2019-08-02 | 核工业井巷建设集团有限公司 | A kind of quick reinforcement construction method in tunnel |
| CN112459813A (en) * | 2020-10-30 | 2021-03-09 | 山东东山新驿煤矿有限公司 | Anchor cable setting calculation method for fully mechanized mining face advance support |
| CN114017085A (en) * | 2021-10-14 | 2022-02-08 | 中煤科工开采研究院有限公司 | Roadway supporting device and method for thick-layer loose coal rock mass difficult to anchor |
| CN116220769A (en) * | 2023-05-06 | 2023-06-06 | 中国矿业大学(北京) | Supporting method and supporting structure adopting microscopic NPR anchor rods or anchor cables |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4764055A (en) * | 1986-10-02 | 1988-08-16 | Birmingham Bolt Company, Inc. | Resin reinforced expansion anchor system |
| CN1464176A (en) * | 2002-06-24 | 2003-12-31 | 吴德兴 | A pin timbering process and sectionalized hollow mud injecting stay bolt thereof |
| CN1966937A (en) * | 2006-11-24 | 2007-05-23 | 天地科技股份有限公司 | Once supporting method for reinforced anchor rod in deep tunnel |
| CN101235721A (en) * | 2008-02-29 | 2008-08-06 | 李明远 | Reasonable replacement homogeneous wall rock soft rock laneway support construction technology |
| CN201363158Y (en) * | 2009-03-17 | 2009-12-16 | 天地科技股份有限公司 | Anchor rod supporting plate assorted with steel bar supporting beam for use |
-
2010
- 2010-08-13 CN CN 201010256155 patent/CN101949294A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4764055A (en) * | 1986-10-02 | 1988-08-16 | Birmingham Bolt Company, Inc. | Resin reinforced expansion anchor system |
| CN1464176A (en) * | 2002-06-24 | 2003-12-31 | 吴德兴 | A pin timbering process and sectionalized hollow mud injecting stay bolt thereof |
| CN1966937A (en) * | 2006-11-24 | 2007-05-23 | 天地科技股份有限公司 | Once supporting method for reinforced anchor rod in deep tunnel |
| CN101235721A (en) * | 2008-02-29 | 2008-08-06 | 李明远 | Reasonable replacement homogeneous wall rock soft rock laneway support construction technology |
| CN201363158Y (en) * | 2009-03-17 | 2009-12-16 | 天地科技股份有限公司 | Anchor rod supporting plate assorted with steel bar supporting beam for use |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337912A (en) * | 2011-10-17 | 2012-02-01 | 新汶矿业集团有限责任公司华丰煤矿 | Rapid anchoring method for coal mine roadway anchor rod |
| CN102680327A (en) * | 2012-05-07 | 2012-09-19 | 天地科技股份有限公司 | Detection method and detection station for tail deformation of anchor rod |
| CN102680327B (en) * | 2012-05-07 | 2014-03-12 | 天地科技股份有限公司 | Detection method and detection station for tail deformation of anchor rod |
| WO2014146392A1 (en) * | 2013-03-22 | 2014-09-25 | 中国矿业大学 | Paste fixed-length anchoring supporting method |
| WO2015103862A1 (en) * | 2014-01-09 | 2015-07-16 | 中国矿业大学 | Method for supporting by means of full-length pre-stressed anchorage with paste material being first poured and last anchored |
| CN105257325A (en) * | 2015-11-02 | 2016-01-20 | 新汶矿业集团有限责任公司协庄煤矿 | Anchor rod anchoring device for surrounding rock of roadway and anchoring method of anchor rod anchoring device |
| CN106640160A (en) * | 2016-10-24 | 2017-05-10 | 河南理工大学 | Left-handed longitudinal-bar-free full-length high-prestress anchor rod and construction technique thereof |
| CN106640160B (en) * | 2016-10-24 | 2019-03-29 | 河南理工大学 | A kind of left-handed nothing indulges muscle overall length high pre-stress anchor pole and its construction technology |
| CN107677167A (en) * | 2017-10-23 | 2018-02-09 | 山东建筑大学 | Can explosion reaming and the soft stratum prestress anchoraging device and technique filled automatically |
| CN110080802A (en) * | 2019-04-03 | 2019-08-02 | 核工业井巷建设集团有限公司 | A kind of quick reinforcement construction method in tunnel |
| CN112459813A (en) * | 2020-10-30 | 2021-03-09 | 山东东山新驿煤矿有限公司 | Anchor cable setting calculation method for fully mechanized mining face advance support |
| CN114017085A (en) * | 2021-10-14 | 2022-02-08 | 中煤科工开采研究院有限公司 | Roadway supporting device and method for thick-layer loose coal rock mass difficult to anchor |
| CN116220769A (en) * | 2023-05-06 | 2023-06-06 | 中国矿业大学(北京) | Supporting method and supporting structure adopting microscopic NPR anchor rods or anchor cables |
| CN116220769B (en) * | 2023-05-06 | 2023-08-04 | 中国矿业大学(北京) | Supporting method and supporting structure adopting microscopic NPR anchor rods or anchor cables |
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Open date: 20110119 |