CN2054077U

CN2054077U - Wire rope elongation anchoring-bolt

Info

Publication number: CN2054077U
Application number: CN 89208444
Authority: CN
Inventors: 荣际凯; 侯尚武
Original assignee: China University of Mining and Technology CUMT
Current assignee: China University of Mining and Technology CUMT
Priority date: 1989-06-07
Filing date: 1989-06-07
Publication date: 1990-03-07

Abstract

Disclosed is a wire rope elongation anchoring-bolt applied to underground engineering such as coal mine, railway, hydroelectricity, military affairs, etc., in particular to the underground engineering support of soft rock and rock layer with great deflection and expansion when in water. An expanding shell is outside a drawing die whose surface has saw teeth. One end of an extension rod is a flattened shape, when the pressure of the rock amounts to a certain tonnage, the flattened part produces creep through the die hole of the drawing die, enabling the rock to deform stably. The device has the advantages of good anchoring effect and expanded range; furthermore, the utility model reduces manufacture cost greatly by adopting waste and old steel cable to replace steel products.

Description

Wire rope elongation anchoring-bolt

Be applicable to the shaft and drift supporting in the underground constructions such as colliery, metallic ore, railway, water power, military affairs, press with being particularly useful for big, country rock is soft, deflection is big, the rock stratum of water-swellable or be subjected to the underground engineering support of mining influence.

The prior art of this technical field can be consulted the Chinese patent application number patent application for " 87207154 " and " 87206402 ".These two kinds of anchor poles, have respectively the elongation adjustable, manufacturing cost is lower, have the characteristics of first anchor-hold, but preceding a kind of anchor pole all adopts metallic rod body, so cost is higher relatively, then a kind of anchor pole is then owing to can not extend, fragile when the rock deformation of underground engineering is big, lose the effect in its supporting tunnel.

In view of the deficiency that exists in the prior art, the purpose of this utility model is a kind of simple in structure, easy to use, elongation is adjustable and manufacturing cost is lower rope stretch anchor pole of design.

The utility model is made up of extension rod 1, drawing-die 2, expand shell 3, wire rope 4, wire rope attachment screw 5, pallet 6 and nut 7.Extension rod one end is pressed into flat with the forging and pressing mode, and the other end is connected with wire rope 4; Drawing-die 2 is for having the sizing nib in outer conical surface and female cone hole, extension rod passes the female cone hole of drawing-die, the external surface of bloated shell 3 has sawtooth, uniform circumference has 3～4 grooves, be positioned at outside the drawing-die outer conical surface, by relative motion between the two, promptly the diameter of inflatable bloated shell embeds on the hole wall of bolthole sawtooth; Wire rope 4 is the strand wire that contains 18 above steel wires through straightening.Wire rope adopts the connection of colding pressing with the connected mode of extension rod 1 and wire rope attachment screw 5, promptly holes at an end of extension rod and wire rope attachment screw.Then wire rope is inserted in the boring, be cold-pressed into flat, wire rope connects the other end machining screw of fly nail, so that tray 6 and use nut 7 fixing.

The utlity model has when the pressure from surrounding rock of underground engineering is big, the characteristics of extending unloading, anchoring effect is good, can avoid the generation of accidents such as country rock roof fall, wall caving effectively, has enlarged the scope of application; In addition, also can make full use of the waste steel wire rope and replace steel, easy to install, simple in structure, with low cost.

Accompanying drawing is a structure chart of the present utility model.

Extension rod 1 is made by ordinary low-carbon steel, and the one end is pressed into flat with the forging and pressing mode, when pressure from surrounding rock increases, when the bearing capacity of anchor pole increases to certain tonnage.The crushed element of extension rod will produce plastic strain through the female cone hole of drawing-die 2, from nib, pull out lentamente, make the distortion of adjoining rock stability ground, its moving resistance is determined by the width of flat part, in its end, then be pressed into width bigger stop homalocephalus, when making extension rod 1 be pulled out to the termination, unlikely quilt is all pulled out; The medium carbon structure steel that drawing-die 2 adopts through Quenching Treatment; The shell 3 that expands is casting medium carbon steel casting; Wire rope attachment screw 5 is made by ordinary low-carbon steel; 6 on pallet is a standard cast iron pallet.

Claims

1, a kind of underground constructions such as colliery that are applicable to, the rope stretch anchor pole of the underground engineering support that especially country rock is soft, deflection is big, include drawing-die 2, bloated shell 3, wire rope attachment screw 5, pallet 6 and nut 7, it is characterized in that bloated shell 3 is positioned at the outside of drawing-die 2 outer conical surface, extension rod 1 passes the female cone hole of drawing-die 2, and the one end is a flat, the end be width bigger stop homalocephalus, the other end is porose, behind the insertion wire rope 4, is cold-pressed into flat; One end of wire rope attachment screw 5 is porose, insert the other end of wire rope 4 equally after, be cold-pressed into flat.