CN204267057U - A kind of nested type pipe seam anchor bar - Google Patents

A kind of nested type pipe seam anchor bar Download PDF

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Publication number
CN204267057U
CN204267057U CN201420637464.9U CN201420637464U CN204267057U CN 204267057 U CN204267057 U CN 204267057U CN 201420637464 U CN201420637464 U CN 201420637464U CN 204267057 U CN204267057 U CN 204267057U
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CN
China
Prior art keywords
peripheral
anchor
seam
pipe
embedded
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.)
Expired - Fee Related
Application number
CN201420637464.9U
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Chinese (zh)
Inventor
马文强
王同旭
马凯
江姣姣
李啸啸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong University of Science and Technology
Original Assignee
Shandong University of Science and Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shandong University of Science and Technology filed Critical Shandong University of Science and Technology
Priority to CN201420637464.9U priority Critical patent/CN204267057U/en
Application granted granted Critical
Publication of CN204267057U publication Critical patent/CN204267057U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of nested type pipe seam anchor bar, mainly contain peripheral pipe-seam type anchor rod (the peripheral anchor pole of hereinafter referred), embedded pipe-seam type anchor rod (the embedded anchor pole of hereinafter referred) and embedded anchor rod pallet board three part composition; First peripheral anchor pole is squeezed into armature boring by jumbolter during use, and its end is submerged boring; Load onto pallet at embedded anchor rod body, then squeezed into the inner casing of peripheral anchor pole with rig; Continue to advance embedded anchor pole, make its pallet and coal and rock intimate surface contact, complete installation.The utility model adds full length fastening power during single pipe-seam type anchor rod supporting, and shearing resistance when simultaneously enhancing single pipe-seam type anchor rod supporting and tensile strength, promote and improve the anchorage effect of pipe-seam type anchor rod further, have certain practical value.

Description

A kind of nested type pipe seam anchor bar
Technical field
The utility model relates to a kind of nested type pipe seam anchor bar, conveniently can be applied to the surrounding rock supporting in geotechnical engineering.
Background technology
Pipe-seam type anchor rod is the anchor pole type of existing a kind of full length fastening, active enforcement country rock.The main part of pipe-seam type anchor rod is the high tensile steel tube that a longitudinal direction is cracked, when being installed on the boring slightly less than caliber, can in length range, apply radial pressure to hole wall immediately and stop the frictional force of surrouding rock deformation, add the supporting force of anchor rod pallet board, thus make country rock be in triaxial stress state, and when remarkable displacement occurs country rock, anchor pole does not lose its supporting drag.
But known pipe-seam type anchor rod also also exists shortcoming when supporting, as anchored force is lower, and should not grow in fault crevice, coal and rock expansive rock stratum applies in tunnel.The measure of increase pipe-seam type anchor rod anchored force known at present has: (1) reduces bore diameter; (2) length of pipe-seam type anchor rod is lengthened; (3) suitable aperture ratio is selected between anchor pole and boring.But the enforcement of these measures will increase the difficulty of rockbolt installation, and the increasing degree of anchored force is limited.Existing patent " pipe-seam type anchor rod " (license CN201292856Y), specific embodiments is: will be arranged in anchoring boring at the pipe-seam type anchor rod of anchor head position weldable steel band, within the scope of the effective length of welding steel band, cement-roll is installed again, at position, termination, supporting plate is installed and with connector, supporting plate is fixed.This patent just adds anchored force in the anchor head part of pipe-seam type anchor rod, and pipe seam part anchored force does not increase.
As can be seen here, existing pipe-seam type anchor rod awaits further improving and development.
Utility model content
For the technical problem that existing pipe-seam type anchor rod exists, the utility model provides a kind of nested type pipe seam anchor bar, add full length fastening power during pipe-seam type anchor rod supporting, enhance shearing resistance and the tensile strength of anchor pole simultaneously, the anchorage effect of pipe-seam type anchor rod is made to be promoted further and improve, successful, has good practicality.
To achieve these goals, the utility model adopts following technical scheme:
A kind of nested type pipe seam anchor bar, first peripheral pipe-seam type anchor rod (the peripheral anchor pole of hereinafter referred) is squeezed into armature boring, again embedded pipe-seam type anchor rod (the embedded anchor pole of hereinafter referred) is overlapped top tray, squeeze into peripheral pipe-seam type anchor rod inner casing, form nested type pipe seam anchor bar.
Preferably, armature boring diameter=(0.9 ~ 0.95) × peripheral bolt diameter in rock stratum, the armature boring degree of depth=peripheral rock-bolt length+100mm; Armature boring diameter in coal seam=(0.9 ~ 1.00) × peripheral bolt diameter, the armature boring degree of depth=peripheral rock-bolt length+200mm.
Further, embedded pipe-seam type anchor rod length is 3/4 of peripheral tube seam rock-bolt length, embedded bolt diameter 3mm larger than peripheral bolt diameter.
Further, peripheral anchor pole will be squeezed in boring completely, and it is inner that embedded anchor pole also will squeeze into peripheral anchor pole completely, ensures that embedded anchor rod pallet board and coal petrography wall are adjacent to.
Advantageous Effects of the present utility model is:
Squeeze into boring because two pipe-seam type anchor rods are successively nested, add the opposing compression power between anchor pole and drill hole wall, namely increase the frictional force between anchor pole and borehole wall, its full length fastening power is increased considerably, produces good supporting effect; Mutually nested anchor pole is combined into bolt support body under the effect of mutual extruding force, enhances shearing resistance and the tensile strength of anchor pole, extends the length of service of anchor pole.
Accompanying drawing explanation
Fig. 1 is the armature boring Longitudinal cross section schematic adopting the utility model to carry out supporting;
Fig. 2 is the A-A sectional view of Fig. 1, the i.e. cross-sectional view of nested anchor bar body;
Wherein, 1-boring, 2-peripheral pipe-seam type anchor rod, 3-peripheral anchor pole inner casing, 4-embedded pipe-seam type anchor rod, 5-coal and rock, 6-pallet, 7-anchor pole baffle ring.
Detailed description of the invention
The utility model provides a kind of nested type pipe seam anchor bar, in order to make the purpose of this utility model, technical scheme and advantage clearer, clear and definite, below with reference to accompanying drawing and embodiment, further describes the utility model for coal seam supporting.
A kind of nested type pipe seam anchor bar, comprise peripheral anchor pole 2, embedded anchor pole 4 and embedded anchor rod pallet board 6 form.
Concrete installation embodiment is as follows:
(1) according to designing requirement determination bolthole position, with rig tool drilling 1, the rock dust of holing to the greatest extent with pressure wind in 1;
(2) in boring 1, squeeze into peripheral anchor pole 2 with Churn drill, and its end is submerged boring 1;
(3) load onto pallet 6 at embedded anchor pole 4 body of rod, then squeezed into the inner casing 3 of peripheral anchor pole 2 with rig;
(4) continue to advance embedded anchor pole 4, make its pallet 6 and coal and rock 5 intimate surface contact, complete installation.
Described peripheral bolt diameter=43mm, bore diameter=43mm × 0.95=41mm, rock-bolt length 2000mm, drillable length 2200mm; Embedded bolt diameter 40mm, rock-bolt length 1500mm.
Described peripheral anchor pole afterbody must submerge boring, with make embedded anchor rod pallet board can smoothly and coal petrography wall be adjacent to.
Should be understood that; the above-mentioned description for preferred embodiment is comparatively detailed; therefore the restriction to the utility model scope of patent protection can not be thought; those of ordinary skill in the art is under enlightenment of the present utility model; do not departing under the ambit that the utility model claim protects; can also make the various deformation such as replacement, simple combination, these all fall within protection domain of the present utility model, and request protection domain of the present utility model should be as the criterion with claims.

Claims (4)

1. a nested type pipe seam anchor bar, is characterized in that: first peripheral pipe-seam type anchor rod (2) is squeezed into armature boring (1), then by embedded pipe-seam type anchor rod (4) cover top tray (6), squeezes into peripheral anchor pole inner casing (3), forms nested type pipe seam anchor bar.
2. according to a kind of nested type pipe seam anchor bar described in claim 1, it is characterized in that: armature boring diameter=(0.9 ~ 0.95) × peripheral bolt diameter in rock stratum, the armature boring degree of depth=peripheral rock-bolt length+100mm; Armature boring diameter in coal seam=(0.9 ~ 1.00) × peripheral bolt diameter, the armature boring degree of depth=peripheral rock-bolt length+200mm.
3. according to a kind of nested type pipe seam anchor bar described in claim 1, it is characterized in that: peripheral anchor pole (2) afterbody must submerge boring (1), with make embedded anchor rod pallet board (6) can smoothly and coal petrography wall (5) be adjacent to.
4. according to a kind of nested type pipe seam anchor bar described in claim 1, it is characterized in that: consider deviation proportion when peripheral anchor pole (2) is installed, the length of embedded anchor pole (4) is 3/4 of peripheral anchor pole (2), embedded anchor pole (4) external diameter 3mm larger than peripheral anchor pole (2) external diameter.
CN201420637464.9U 2014-10-30 2014-10-30 A kind of nested type pipe seam anchor bar Expired - Fee Related CN204267057U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420637464.9U CN204267057U (en) 2014-10-30 2014-10-30 A kind of nested type pipe seam anchor bar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420637464.9U CN204267057U (en) 2014-10-30 2014-10-30 A kind of nested type pipe seam anchor bar

Publications (1)

Publication Number Publication Date
CN204267057U true CN204267057U (en) 2015-04-15

Family

ID=52801929

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420637464.9U Expired - Fee Related CN204267057U (en) 2014-10-30 2014-10-30 A kind of nested type pipe seam anchor bar

Country Status (1)

Country Link
CN (1) CN204267057U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108087003A (en) * 2017-12-15 2018-05-29 招金矿业股份有限公司大尹格庄金矿 A kind of pipe-seam type anchor rod method for protecting support

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108087003A (en) * 2017-12-15 2018-05-29 招金矿业股份有限公司大尹格庄金矿 A kind of pipe-seam type anchor rod method for protecting support

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150415

Termination date: 20151030

EXPY Termination of patent right or utility model