CN205445644U - Interior overlength shell type pipe seam stock of wearing - Google Patents

Abstract

The utility model discloses an interior overlength shell type pipe seam stock of wearing, outside pipe seam formula stock (the hereinafter is called for short outside stock), interior poling stitch formula stock (wearing the stock in the hereinafter abbreviation), tray, let and press spring (hereinafter abbreviation spring), fuse, five parts of chuck to constitute as follows mainly, wear the outside stock of stock anchor head wherein and send forth one section to wear in, the stock afterbody and newly open three seams, be three lamella formulas and open. Earlier squeeze into anchor anchor drilling with outside stock through roofbolter during the use to make its afterbody submerge in the drilling, including wear the stock and load onto the tray, then wear the stock with the rig in will and push up the inner shell that cement medicated roll squeezed into outside stock, wear the stock in continue advancing and make cement medicated roll top go into hole bottom department and stir to the equipartition closely knitly, make tray and coal petrography body surface face in close contact with, load onto the spring later to the afterbody, strike the chuck, tie up the fuse, accomplish the installation. The utility model discloses having strengthened the end anchor, having promoted body of rod intensity, the resistance -increasing yielding property that has increased the anchor tail can, the effect that makes the pipe seam stock is exert ultimate attainmently, have simple structure, easy operation, anchor strong, let and press characteristics such as sufficient, have certain practical application to worth.

Description

Overlength shell type pipe seam anchor bar is worn in one

Technical field

This utility model relates to Surrounding Rock Control and supporting field in mine and underground engineering, wears overlength shell type pipe seam anchor bar in being specifically related to one.

Background technology

Common pipe-seam type anchor rod is a kind of full length fastening, the anchor pole actively reinforcing country rock.Its body portion is the high tensile steel tube that a longitudinal direction is cracked, when being installed on the boring more slightly smaller than caliber, owing to cracking, steel pipe is compressed, tube wall is made tightly to adhere to hole wall, in length range, hole wall can be applied radial pressure immediately and stop the frictional force of surrouding rock deformation, plus the supporting force of anchor rod pallet board, make country rock be in triaxial stress state, thus realize the stable support action to coal and rock.

This common pipe-seam type anchor rod also exists certain defect, is exactly the most significantly that anchor force is relatively low；Its anchor head anchor force is the lowest.Apply in dynamic pressure substantially has fault crevice growth, tunnel, coal and rock expansive rock stratum, easily occur that anchor head lost efficacy, the hypodynamic feelings of anchoring of the body of rod.Heading is soft, big by mining influence, after there is substantial amounts of surrouding rock deformation, does not has yielding property to be easily pulled off.It is therefore desirable to design a be provided simultaneously with end anchorage, the body of rod anchoring, afterbody yielding property can anchor pole, tackle increasingly complex host rock environment.

Utility model content

The technical problem existed for existing pipe-seam type anchor rod, wears overlength shell type pipe seam anchor bar in this utility model offer one, and two pipe seam anchor bars are combined in the form of wearing.Full length fastening power when not only increasing pipe-seam type anchor rod supporting also enhances tension and the shearing strength of anchor pole, the effect wearing termination point of anchor rod and Anchor Agent in Tong Shi strengthens end anchorage especially, the increasing resistance yielding property energy of pipe seam anchor bar of inside having worn what the combination of the spring of anchor pole afterbody and timber wedge improved, makes the anchorage effect of pipe-seam type anchor rod be promoted further and improve.Obvious in dynamic pressure, there is fault crevice to grow, coal and rock easily expands, have preferable practicality in the tunnel, rock stratum of changeableness.

To achieve these goals, this utility model adopts the following technical scheme that as follows:

Wear overlength shell type pipe seam anchor bar in one, first exterior tube anchor pole is squeezed into armature boring, then wears anchor sleeve top tray by interior, squeeze into outside anchor pole inner shell, formed and wear formula pipe seam anchor bar.

By theory, armature boring diameter=(0.9～0.95) × outside bolt diameter in rock stratum, the armature boring degree of depth=in wear rock-bolt length+100mm；Armature boring diameter=(0.9～1.00) × outside bolt diameter, the armature boring degree of depth=outside rock-bolt length+200mm in coal seam.

Further, outside rock-bolt length is the 3/4 of interior poling rock-bolt length, wears the big 3mm of bolt diameter in outside bolt diameter ratio.

Further, after outside anchor pole is squeezed in boring completely, inside wear anchor pole cement-roll to be headed on through outside anchor pole inner shell at the bottom of hole, it is ensured that inside wear the anchor force of termination point of anchor rod.

Further, inside wear anchor pole afterbody and put spring and electric fuse tied up by timber wedge of driving in, form the combination of spring timber wedge.

Advantageous Effects of the present utility model is:

The form mutually worn due to two pipe-seam type anchor rods, improve the rigidity that anchor pole is overall, add the opposing compression power between anchor pole and the wall of a borehole, i.e. increase the frictional force of anchor pole and borehole wall, the full length fastening power making it is increased considerably, strengthen tension and the shearing strength of anchor pole, produce preferable supporting effect；Inside wear the part that anchor pole anchor head exceeds to be combined with cement-roll and strengthen end anchorage；During surrouding rock deformation, anchor tail is by increasing resistance pallet introversion face effect of contraction, and during increasing resistance pallet slides out against, spring-compressed, anchor pole draws tighter and tighter, and the combining form of the spring timber wedge inside wearing anchor pole afterbody serves the effect allowing pressure increase resistance.This utility model entirety improves the supporting effect of pipe seam anchor bar, and extends the service life of anchor pole.

Accompanying drawing explanation

Fig. 1 is the boring schematic cross-section that this utility model carries out supporting；

Fig. 2 is the A-A profile of Fig. 1；

Wherein, 1 outside anchor pole, wear anchor pole, 3 pallets, 4 springs, 5 timber wedges, 6 electric fuses, 7 cement-rolls in 2.

Detailed description of the invention

This utility model wears overlength shell type pipe seam anchor bar in providing one, in order to make the purpose of this utility model, technical scheme and advantage become apparent from, clearly, below with reference to accompanying drawing and embodiment, this utility model is described in further detail by the supporting with regard to coal rock layer.

Wear overlength shell type pipe seam anchor bar in one, including outside anchor pole 1, in wear anchor pole 2, pallet 3, spring 4, timber wedge 5 and electric fuse 6 and form.

Concrete installation embodiment is as follows:

(1) determine bolthole position according to design requirement, beat armature boring with rig tool, the rock grain in holing to the greatest extent with pressure wind；

(2) bore with impact in boring, squeeze into outside anchor pole 1, and make its afterbody submerge boring；

(3) load onto pallet 3 at interior anchor pole 2 of wearing, then headed on cement-roll 7 with rig and squeeze into the inner shell of outside anchor pole 1；

(4) wear anchor pole 2 in continuing to advance, make the end, cement-roll 7 to hole and stir packed uniform, and make its pallet 3 and coal and rock intimate surface contact；

(5) overlap spring 4 at interior anchor pole 1 afterbody of wearing and knock in cone timber wedge 5, wearing anchor pole 2 afterbody in making and open,；After spring 4 is in mild compression state, tie up electric fuse 6 to timber wedge 5, complete to install.

Described outside bolt diameter=43mm, outside rock-bolt length 1500mm；Inside wear bolt diameter 40mm, inside wear rock-bolt length 2100mm；Pipe thickness 3.5mm.Described drillable length 2200mm, bore diameter=43mm × 0.95=41mm, described its length 70mm；Described pallet radius 70mm；Described cone timber wedge diameter 55mm, high 70mm.

Should be understood that; the above-mentioned description for preferred embodiment is the most detailed; therefore the restriction to this utility model scope of patent protection can not be considered; those of ordinary skill in the art is under enlightenment of the present utility model; in the case of without departing from this utility model scope of the claimed protection; can also make the various deformation such as replacement, simple combination, within these each fall within protection domain of the present utility model, the scope that is claimed of the present utility model should be as the criterion with claims.

Claims (4)

1. wear overlength shell type pipe seam anchor bar in one kind, mainly by outside anchor pole (1), in wear anchor pole (2), pallet (3), spring (4), timber wedge (5) and electric fuse (6) and form, it is characterized in that: inside wear anchor pole (2) and penetrate outside anchor pole (1) inside, inside wear and at anchor pole (2) anchor head, have cement-roll (7), its afterbody is cased with pallet (3) and spring (4), tail inner side has struck timber wedge (5), and outside bundle has electric fuse (6).

Overlength shell type pipe seam anchor bar is worn in one the most according to claim 1, it is characterized in that: outside anchor pole (1) and interior anchor pole (2) of wearing are pipe seam anchor bar, outside anchor pole (1) than in wear anchor pole (2) short and in wear anchor pole (2) anchor head and grow one section than outside anchor pole (1), the length of outside anchor pole (1) wears the 3/4 of anchor pole (2) length in being.

Overlength shell type pipe seam anchor bar is worn in one the most according to claim 1, it is characterized in that: inside wear anchor pole (2) afterbody and newly open three sections and crack, it is allowed to open in three-clove style uniformly, between every twice are cracked, angle is 120 degree, anchor pole afterbody is equipped with spring (4) and timber wedge (5), and timber wedge is cone.

Overlength shell type pipe seam anchor bar is worn in one the most according to claim 1, it is characterised in that: the valid bonding length of required cement-roll (7)Inside wear the relatively outside anchor pole (1) of anchor pole (2) anchor head beyond segment length.