CN-107120129-B - Reinforced anchoring anchor cable with thorn head and application method thereof

Abstract

The invention discloses a barbed head reinforced anchoring anchor rope and a use method thereof, wherein the anchor rope comprises an anchor rope body and a barbed head device, the anchor rope body is a steel strand, the barbed head device is formed by a metal wire which is wound and fixed on the anchor rope body, two ends of the metal wire are hooked and twisted into a twist-shaped exposed barbed head, and the twist-shaped exposed barbed head and the central axis of the anchor rope body form an included angle. The invention not only increases the diameter of the anchor cable body, but also is easy to hook and scratch the resin anchoring agent by the arranged thorn head. The invention has simple structure, safe use, easy material acquisition and low cost. The installation speed is high, the effect is good, and the labor intensity is low in site construction. Not only can the anchoring performance of the anchor cable be improved in the soft broken coal (rock) body, but also the technical problems that the anchor cable is high in anchor loss rate and difficult to anchor in the strong-current coal (rock) body can be solved.

Inventors

• XIE WENBING
• JING SHENGGUO
• WANG XINGKAI
• MA MINGJIE
• LI LUHENG

Assignees

• 中国矿业大学

Dates

Publication Date

20260505

Application Date

20170525

Claims (4)

1. 1. The anchor cable with the thorn head reinforcement is characterized by comprising an anchor cable body (1) and a thorn head device (2), wherein the anchor cable body (1) is a steel strand, the thorn head device (2) is formed by a metal wire, the metal wire is wound and fixed on the anchor cable body (1), two ends of the metal wire are hooked and screwed into a twist-shaped exposed thorn head (201), and the twist-shaped exposed thorn head (201) and the central axis of the anchor cable body (1) form an included angle; One end of the metal wire penetrates through the inside of a plurality of steel strands of the anchor cable body (1), is clamped between the steel strands of the outer ring of the anchor cable body (1) and the middle core wires of the steel strands, is fixed on the anchor cable body (1), and the other end of the metal wire is wound on the anchor cable body (1) and is wound into a plurality of turns, each turn is closely arranged into a row, and the two ends are hooked and twisted into a twist-shaped exposed thorn head (201) towards the anchoring end in the anchor cable; the included angle between the exposed thorn head (201) and the central axis of the anchor cable body (1) is 30 degrees.
2. 2. The barbed head reinforced anchor cable according to claim 1, wherein the wire is wound 8-15 turns and has a length of 25-50 mm.
3. 3. The barbed head reinforced anchor cable according to claim 1, wherein the exposed length of the exposed barbed head (201) is 5-10 mm.
4. 4. The barbed head reinforced anchor cable according to claim 1, wherein the root of the exposed barbed head (201) has a length of 100-200 mm from the anchoring end in the cable.

Description

Reinforced anchoring anchor cable with thorn head and application method thereof Technical Field The invention relates to an anchor cable for supporting or reinforcing geotechnical engineering such as traffic, water conservancy and hydropower, bridge tunnels, underground chambers, urban foundation pits and the like, in particular to a barbed head reinforced anchor cable suitable for mining of soft coal (rock) mines. Background After anchor cable reinforcement technology is introduced from the 60 th century of China, the technology is developed to a great extent. Particularly, after the small-aperture resin anchoring prestressed anchor cable is developed successfully in 1996, the anchor cable is popularized and applied in a large area in a coal roadway, the application range of the anchor net support is remarkably expanded, the safety and reliability of the roadway are improved, and the anchor cable becomes a main means for reinforcing and strengthening the roadway. However, in the field construction and application process, the existing anchor cable has the following problems that the small-aperture anchor cable body used in the coal mine at present is ① mainly steel strands with a 1X 7 structure, and the nominal diameter is phi 17.8mm or phi 21.6mm. In the loose coal (rock) body, if wet operation is adopted, the actually formed drilling diameter is larger than the designed drilling diameter due to vibration of a drill rod and water flushing, so that the drilling diameter, the anchor rope diameter and the resin cartridge diameter are not matched, and the anchoring agent is sometimes extruded and deformed. Therefore, when the anchor is anchored, the anchor rope can not be stirred sufficiently or the anchoring agent is not stirred sufficiently, so that the anchor effect of the anchor rope is poor or the anchor loss is easy to occur, and the anchor effect of the common anchor rope can not be ensured for loose and broken coal (rock) bodies ②. And in case the anchor cable is anchored and failed, the upper coal (rock) layer is difficult to form a composite supporting body structure, so that the soft and strong rheological coal (rock) body is greatly deformed under the action of high ground stress, the deformation and the damage of surrounding rocks of a roadway cannot be inhibited, the stability of a top plate is ensured, and the construction safety and the construction progress are seriously influenced. Therefore, the anchoring effect of the anchor cable is improved, the prestress of the anchor cable is very important for exerting the bearing capacity of the anchor cable and effectively controlling the deformation of surrounding rock of a roadway, and secondary expansion repair and repeated support of a newly-repaired roadway are avoided, so that the roadway support cost is reduced. Disclosure of Invention The invention provides a reinforced anchoring anchor rope with a thorn head and a use method thereof, aiming at solving the problems that the anchor rope in a drilling hole cannot be stirred or the anchoring agent is not uniformly stirred due to mismatching of three diameters, the resin explosive roll is not broken, the anchoring agent is not extruded and fully stirred, the drilling hole in an inner anchoring head area cannot be fully filled, the anchoring agent is not tightly bonded with the anchor rope and the hole wall, the effective anchoring length of the anchor rope is short, the anchoring effect is poor, the quality is unreliable and the like. In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides a take thorn head to strengthen anchor rope, includes the anchor rope body and thorn head device, and the anchor rope body is the steel strand wires, and thorn head device comprises a wire, twines to fix on the anchor rope body, and the two end hooks of this wire twist into a twist-shaped exposes thorn head, and this twist-shaped exposes thorn head constitutes an contained angle with the axis of anchor rope body. One end of the metal wire penetrates through the inside of the multi-strand steel strands of the anchor cable body and is fixed on the anchor cable body, the other end of the metal wire is wound on the anchor cable body and is wound into a plurality of turns, each turn is closely arranged into a row, and the two ends are hooked and twisted into a twist-shaped exposed thorn head towards the anchoring end in the anchor cable. The metal wire is wound for 8-15 turns, and the length is 25-50 mm. The exposed length of the exposed needling head is 5-10 mm. The included angle between the exposed thorn head and the central axis of the anchor cable body is 30 degrees. The length of the root part of the exposed piercing head away from the anchoring end in the anchor cable is 100-200 mm. The application method of the barbed head reinforced anchoring anchor cable comprises the following steps: After the anchor rope is drilled and formed, before the an