CN107060855A - A kind of new type mining anchor cable - Google Patents

Abstract

The invention relates to a novel anchor cable for mining, which comprises a hollow anchor cable, a steel core wire, a resin anchor section, a spiral reinforcement ring, a tray A, a spring pressure release device, a tray B and a lock. The hollow anchor cable is composed of 8 steel strands reversely twisted. The hollow anchor cable has a cavity inside, and a steel core wire is arranged in the cavity, and the steel core wire is composed of two steel strands in reverse One side of the hollow anchor cable and the steel core wire is fixed by the tray and the lock, and the other side is connected with the resin anchor section. The hollow anchor cable is evenly arranged with forward spiral reinforcement rings. The spiral reinforcement ring passes Welding is connected with the hollow anchor cable, and the hollow anchor cable is provided with tray A, spring pressure device, tray B and anchor in sequence, and a spring pressure device is installed between pallet A and pallet B, and the pressure range is 0-80mm . The invention has the functions of good deformation coordination, enhanced bearing capacity, yielding pressure, uniform stirring of anchoring agent and the like.

Description

A new mine anchor cable

technical field

The invention relates to a novel anchor cable suitable for soft and broken surrounding rocks and relatively deformed roadways in deep coal mines, and belongs to the technical field of mine anchoring and support.

Background technique

With the gradual deepening of deep coal mines in my country, roadway support projects are increasing and the requirements for support are also increasing. At present, anchor cables are usually used for temporary support in roadway support; however, the existing Most of the anchor cables are solid anchor cables, which cannot be deformed synchronously. It is easy to cause damage to the anchor cables and a large amount of waste of steel strands, causing serious pollution to groundwater resources. During grouting reinforcement, the diffusion of grout is difficult and the distribution is uneven. , it is easy to cause uneven stress on the anchor cable, and it is difficult to achieve the purpose of increasing the strength of the surrounding rock, which is not conducive to the stability of the surrounding rock of the roadway.

Contents of the invention

Aiming at the above technical problems, the present invention provides a safe and reliable new mine anchor cable, which integrates end anchorage and anchor cable anchorage, greatly improves the bearing capacity of the surrounding rock of the roadway, and ensures the stability of the roadway.

In order to achieve the above object, the technical solution adopted by the present invention to solve the technical problems is:

The invention relates to a new type of mine anchor cable, comprising a hollow anchor cable, a steel core wire, a resin anchor section, a spiral reinforcement ring, a tray A, a spring pressure release device, a tray B and a lock, characterized in that: the hollow anchor cable It is composed of 8 steel strands twisted in opposite directions. The hollow anchor cable has a cavity inside, and a steel core wire is arranged in the cavity. The steel core wire is composed of 2 steel strands twisted in opposite directions. One side of the hollow anchor cable and the steel core wire is fixed by the tray and the lock, and the other side is connected with the resin anchor section. connected, the hollow anchor cable is sequentially provided with a tray A, a spring let-down device, a tray B and an anchor.

The distance between the spiral reinforcement rings is 30cm.

The spring let-down device has a let-down range of 0-80mm.

The material of the anchoring end is resin.

Compared with the existing anchor cables, the beneficial effects of the present invention are reflected in: the end anchoring and the anchor cable anchoring are integrated, which greatly increases the anchoring force and bearing capacity; the steel core wire is added inside the anchor cable, and the steel ropes are tightly Fitting, with the same elongation, good deformation coordination makes all the steel ropes bear the same load, preventing the steel strands from being broken due to uneven force; welding the spiral reinforcement ring on the anchor cable, when the anchor cable stirs the slurry The spiral aiding ring can fully stir, and at the same time, there is a certain gap between the anchor cable and the borehole wall, and the grout can be evenly bonded to the anchor cable and the drill hole, greatly increasing the pulling force; springs are set between the trays to allow The pressure device can play the role of giving way, which can well protect the anchor cable and prevent the anchor rod from being damaged by pulling.

Description of drawings

Fig. 1 is a schematic structural view of the present invention.

In the figure: 1. Hollow anchor cable 2. Steel core wire 3. Spiral reinforcement ring 4. Resin anchor section 5. Tray A 6. Tray B 7. Spring pressure relief device 8. Lock

detailed description

The present invention will be further described below in conjunction with the accompanying drawings: a new mining anchor cable, including a hollow anchor cable (1), a steel core wire (2), a spiral reinforcement ring (3), a resin anchoring section (4), a tray A (5), spring let-down device (7), pallet B (6), lockset (8), are characterized in that: the hollow anchor cable (1) is made of 8 steel strands reversely twisted, and the hollow anchor cable (1 ) has a cavity inside, and a steel core wire (2) is arranged in the cavity. The steel core wire (2) is composed of two steel strands twisted in opposite directions. One side is fixed with the lock by the tray, and the other side is connected with the resin anchor section (4); the forward spiral reinforcement rings (3) are evenly arranged on the hollow anchor cable, with a distance of 30 cm; the hollow anchor cable (1) is sequentially Tray A (5), spring pressure relief device (7), pallet B (6) and anchorage (8) are provided, and spring pressure relief device (7) is installed between pallet A (5) and pallet B (6) , let the pressure range is 0-80mm.

The steel core wire (2) is added inside the hollow anchor cable (1), so that the overall strength of the anchor cable is improved. At the same time, the hollow anchor cable (1) and the steel core wire (2) are closely bonded to maintain the same elongation and good The deformation coordination makes the anchor cables bear the load together, prevents the steel strands from being broken due to uneven force, and improves the overall tensile strength of the anchor cables.

Weld the spiral reinforcement ring on the anchor cable. When the anchor cable stirs the slurry, the spiral reinforcement ring can fully stir the anchor cable. At the same time, there is a certain gap between the anchor cable and the borehole wall, and the slurry can be evenly mixed with the anchor cable and the anchor cable. Drilling bonding greatly increases the strength of surrounding rock.

When under stress, when the tensile strength of the anchor cable cannot meet the requirements, the spring let-down device (7) can play the role of giving way, buffering the tension tendency of the anchor cable, and can well protect the anchor cable and prevent the anchor rod from The pull destroys.

Claims (4)

1. A new type of anchor cable for mining, including hollow anchor cable (1), steel core wire (2), spiral reinforcement ring (3), resin anchoring section (4), pallet A (5), and spring pressure relief device (7), tray B (6), lockset (8), characterized in that: the hollow anchor cable (1) is made of 8 steel strands reversely twisted, and the hollow anchor cable (1) has a cavity inside, and A steel core wire (2) is arranged. The steel core wire (2) is composed of two steel strands twisted in opposite directions. The hollow anchor cable (1) and the steel core wire (2) pass through the tray and the lock (8) fixed, and the other side is connected with the resin anchoring section (4); the forward spiral reinforcement ring (3) is evenly arranged on the hollow anchor cable; the hollow anchor cable (1) is sequentially provided with a tray A (5), a spring let Compressor (7), pallet B (6) and anchorage (10), between pallet A (5) and pallet B (6) install spring let pressure device (7). 2. A new type of mine anchor cable according to claim 1, wherein the forward spiral reinforcement ring (3) has a spacing of 30 cm and is connected to the hollow anchor cable (1) by welding. 3. The novel mine anchor cable according to claim 1, the material of the anchoring section (4) is resin. 4. A new mining anchor cable according to claim 1, characterized in that the pressure relief range of the spring pressure relief device (7) is 0-80mm.