Application of Mining Anchor

Application of Mining Anchor

Mining anchor rod is a tool applied to support the surrounding rock of mine roadway and underground project, which can ensure the stability of the surrounding rock of mine roadway and underground project.

Mining anchor rod use scope, can realize end anchor, lengthening anchor and ** anchor; easy to operate, low price and other advantages, widely used in coal mines, railroads, hydropower and other projects all kinds of roadway support.

Anchor is the basic component of tunnel support in contemporary coal mines, he will be the roadway rock reinforcement together, so that the surrounding rock itself to support itself. Nowadays, anchors are not only used in mines, but also used in engineering technology to reinforce the main body of slopes, tunnels and dams. Anchor as a deep stratum of tensile member, it is connected with engineering structures at one end, the other end is deep in the stratum, the whole anchor is divided into free section and anchorage section, the free section is the area where the tension at the head of the anchor is transmitted to the anchor solid, and the function of which is to apply prestressing force to the anchor.

I. Classification and characteristics of anchor rods:

1、Fixed anchor: mainly used to support mine roadway, can be divided into single symmetric and double symmetric two kinds, fixed anchor installation is simple, good support effect, but can not adjust the length.

2、Active anchor: mainly used to support the surface and underground construction, can be divided into tension anchor and pressure anchor two kinds. The movable anchor has the function of adjusting the length, is made of high strength steel, has high tensile and compressive strength, and is suitable for the situation where the deep anchor is difficult to control.

3、Hydraulic anchor: It is mainly used to support large cross-section horizontal roadway and roadway with different positional sections, and the hydraulic cylinder is set on the fixed section of anchor, which can be used for the construction of fixed-length anchor, and the hydraulic anchor has the features of simple structure, convenient operation, and reliable support function.

4、Composite anchor: It is a new type of anchor combining fixed anchor and movable anchor with innovative design structure. The boom and the anchor body form a whole, so that the fixed end and the movable end can be displaced relative to each other, which effectively solves the problem of supporting limitations of a single anchor.