CN1144876A - Equi-strength prop pressure-relieving achor bar for expansive soft rock - Google Patents
Equi-strength prop pressure-relieving achor bar for expansive soft rock Download PDFInfo
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- CN1144876A CN1144876A CN 96115683 CN96115683A CN1144876A CN 1144876 A CN1144876 A CN 1144876A CN 96115683 CN96115683 CN 96115683 CN 96115683 A CN96115683 A CN 96115683A CN 1144876 A CN1144876 A CN 1144876A
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- pressure
- rod
- nut
- pallet
- equi
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- Lining And Supports For Tunnels (AREA)
Abstract
A dynamic pressure supporting method for coal mine gallery in expansion soft stratum features that anchor bolt has high yield ratio, proper diameter and extruded thread at end part, and on anchoring, a tray and a nut are used for fastening. Its advantages include improved supporting condition, high safety and low cost.
Description
The present invention relates to colliery expanded downhole soft rock workings subject to dy namic pressure supporting.A kind of extension property of pressure-relieving achor bar that uses of saying so is accurately controlled the soft-rock tunnel equi-strength prop pressure-relieving achor bar that geostatic stress discharges.
Open the rock gangway road under coal mine, a part belongs to the soft tunnel of expanding (also claim: being adopted dynamic pressure influences the tunnel), is often damaged, and common solution is to carry out special supporting.What support pattern was comparatively advanced is, uses the overlapping fastener that adds of U shaped steel, makes the frame of frictional resistance.This steel frame is installed on the good tunnel of developing in advance, presses or distortional stress when surpassing frame and bearing frictional resistance when the tunnel, and the folded U shaped steel of phase weight holds up slip, and the preliminary release of country rock tends to balance, and roadway surrounding rock is kept perfectly and stability thereby reach.But it is big that this support pattern consumes steel material, the labour intensity height, and investment is many, in order to solve these deficiencies, adopts the anchor spray technique.Nut, screw thread, pallet, the body of rod and anchoring agent since this this member and technology do not wait by force, the expansive soft rock tunnel and influenced by dynamic pressure easily to cause screw thread stripped thread, pallet to go to sticks and staves or the anchoring agent powerful not enough, cause wall rock loosening, inbreak and being damaged, influence is normal produces and safety, and has increased the cost of production of development.
The objective of the invention is: provide a kind of and make pressure-relieving achor bar with round steel, utilize bolting and shotcrete roadway pressure from surrounding rock mechanism, the performance that can extend with pressure-relieving achor bar body on-load, be equipped with the screw thread of strengthening with the anchor rod body Fracture Force, nut and corresponding high strength pallet, anchoring agent, the control top plate pressure relief that forms Trinity equal strength prop discharges geostatic stress.The pressure-relieving achor bar body of rod is under strong conditions such as the Trinity, on-load surpasses specified yield force, anchor rod body begins to extend elongation and plays and allow pressure, make the pulling force balance of country rock Tunnel Pressure and anchor pole extension strength, keep roadway surrounding rock stability and globality, reach the supporting condition that improves roadway surrounding rock, improve the purpose of mine support safety, reduction development cost.
Technical scheme of the present invention is that the yield tensile ratio of change anchor rod body round steel is adjusted material, reaches yield strength and reduces, and determines certain limit elongation per unit length, Fracture Force.When making anchor pole, the intensity that anchoring agent (5), the body of rod (1) and pallet (4), nut (3) are linked equates, forms strong state such as Trinitarian grade, can be from extending from extending after assurance anchor rod body (1) the band certain load.This intensity is destructive power, should equate with the Fracture Force of the body of rod (1), realizes with the yield force that guarantees the body of rod (1).Fracture Force is necessarily greater than yield force.Choose the diameter of the pressure-relieving achor bar body of rod (1) round steel.Yield force, Fracture Force are equipped with and anchor rod body (1) Fracture Force respective threads (2) nut (3), pallet (4), anchoring agent (5) and existing anchor net, anchor spray technique.When pressure-relieving achor bar is made, mainly choose the bar footpath screw thread (2) of the body of rod (1), nut (3), pallet (4).In the tunnel, use with identical with original mode by dress.The material of the body of rod (1) should be that yield tensile ratio is big, the bar footpath suitably, the body of rod (1) termination thread-rolling screw (2), put into pallet (4) during anchoring, fastening with nut (3), when the surrouding rock deformation of expansion deals, when expanding, the compressing body of rod (1) can hold up on-load and extend, reach release, allow pressure, the geostatic stress expansion force is discharged.Screw thread (2) root directly is not less than the body of rod (1) diameter, and the binding of nut (3) and pallet (4) is greater than yield force.
Because the pressure-relieving achor bar body of rod (1) and screw thread (2), pallet (4), the selected good extension strength of nut (3) and specification are subjected to specified surrender pulling force and make body of rod on-load extension elongation realize allowing pressure, have changed original anchor pole and can not adapt to roadway deformation and pressure.Extend anchor pole and extend increase, body of rod stress increases thereupon, controls country rock as far as possible, and roof deformation stress and expansion force reduce.Opening up the tunnel like this held up by the pressure-relieving achor bar on-load, with roadway surrounding rock press, distortional stress, and the body of rod extend tend towards stability till, avoided the tunnel to be damaged, the use of pressure-relieving achor bar does not change original operating type and program, just replaces original anchor pole and changes performance and save 30% above steel.
Description of drawings: Fig. 1 is an agent structure schematic diagram of the present invention.
Among the figure: (1) is that the body of rod, (2) are that screw thread, (3) are that nut, (4) are that pallet, (5) are the anchoring agent.
The contrast accompanying drawing is done detailed description to embodiment.
At first, be as the criterion with anchor rod body (1) Fracture Force, strong screw thread (2), nut (3) and corresponding high strength pallet (4), anchoring agent (5) such as outfit forms Trinity equal strength, can self extend after assurance anchor rod body (1) the band certain load and extend.Extend the round steel material with special production and make the body of rod (1), the termination rolls out screw thread (2) becomes pressure-relieving achor bar.Put into pallet (4) in use, mix nut (3) and be used for fastening.Screw thread (2) is that core diameter of thread keeps identical with body of rod diameter or body of rod rupture strength equates by roll extrusion, extruding purpose, guarantees the extension property realization.Accomplish that screw thread (2), bar footpath, nut (3), pallet (4), anchoring agent (5), bearing strength are identical with the body of rod (1) rupture strength, it is Trinity equal strength, pressure-relieving achor bar is in the expansive soft rock tunnel and can use by the mining influence tunnel, and particularly coal road also can use in other tunnel.The supporting key in tunnel is to utilize the release of expansion loose and soft surrounding rock pressure mechanism, allow pressure, allows its certain deformation, discharges geostatic stress and expansion energy.
The present invention is through using, and first elongation per unit length, bearing capacity all satisfy expansive soft rock roadway support requirement.Adopting round steel to make screw thread, nut, pallet also has certain elongation per unit length, also can realize allowing pressure.Because the control top plate pressure relief of Trinity equal strength prop discharges geostatic stress, make the pulling force balance of country rock Tunnel Pressure and anchor pole extension strength, keep roadway surrounding rock stability and globality, reached the supporting condition that improves roadway surrounding rock, improve the mine support safety, reduced the development cost.
Claims (3)
1, expansive soft rock equi-strength prop pressure-relieving achor bar, it has the body of rod (1), screw thread (2), pallet (4), nut (3), anchoring agent ⑸, it is characterized in that: the body of rod (1) termination thread-rolling screw (2), put into pallet (4) during anchoring, fastening with nut (3), the binding of nut (3) and pallet (4) is greater than yield force.
2, according to the described expansive soft rock equi-strength prop of claim 1 pressure-relieving achor bar, it is characterized in that: screw thread (2) root directly is not less than the body of rod (1) diameter.
3, according to the described expansive soft rock equi-strength prop of claim 1 pressure-relieving achor bar, it is characterized in that: the intensity that anchoring agent (5), the body of rod (1) and pallet (4), nut (3) link equates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96115683 CN1144876A (en) | 1996-03-08 | 1996-03-08 | Equi-strength prop pressure-relieving achor bar for expansive soft rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96115683 CN1144876A (en) | 1996-03-08 | 1996-03-08 | Equi-strength prop pressure-relieving achor bar for expansive soft rock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1144876A true CN1144876A (en) | 1997-03-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96115683 Pending CN1144876A (en) | 1996-03-08 | 1996-03-08 | Equi-strength prop pressure-relieving achor bar for expansive soft rock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1144876A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1788140B (en) * | 2003-05-12 | 2010-08-11 | 阿特拉斯科普科凿岩机股份公司 | Expandable rock bolt and rock bolting system |
| CN101982644A (en) * | 2010-10-16 | 2011-03-02 | 山东科技大学 | Continuously progressive yielding anchor plate |
| CN102536283A (en) * | 2012-02-24 | 2012-07-04 | 安徽理工大学 | Retractable constant force yielding anchor bolt for dynamical pressure soft rock lane |
| CN102691513A (en) * | 2012-05-22 | 2012-09-26 | 山东科技大学 | High-strength metal pressure-yielding anchor rod with headed tail |
| CN103821547A (en) * | 2014-03-21 | 2014-05-28 | 洛阳理工学院 | Shockproof large-deformation anchor rod |
-
1996
- 1996-03-08 CN CN 96115683 patent/CN1144876A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1788140B (en) * | 2003-05-12 | 2010-08-11 | 阿特拉斯科普科凿岩机股份公司 | Expandable rock bolt and rock bolting system |
| CN101982644A (en) * | 2010-10-16 | 2011-03-02 | 山东科技大学 | Continuously progressive yielding anchor plate |
| CN101982644B (en) * | 2010-10-16 | 2012-10-31 | 山东科技大学 | Continuously progressive yielding anchor plate |
| CN102536283A (en) * | 2012-02-24 | 2012-07-04 | 安徽理工大学 | Retractable constant force yielding anchor bolt for dynamical pressure soft rock lane |
| CN102536283B (en) * | 2012-02-24 | 2014-03-05 | 安徽理工大学 | Retractable constant force yielding anchor bolt for dynamical pressure soft rock lane |
| CN102691513A (en) * | 2012-05-22 | 2012-09-26 | 山东科技大学 | High-strength metal pressure-yielding anchor rod with headed tail |
| CN103821547A (en) * | 2014-03-21 | 2014-05-28 | 洛阳理工学院 | Shockproof large-deformation anchor rod |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |