With the continuous increase of mining depth, the geological conditions of mining engineering is facing more and more complex, more and more problems of the roadway support occur.The soft, under the condition of high stress roadway support problem bothering mining engineering for a long time.
Self drilling hollow anchor bar was developed rapidly due to its superior performance, and it is widely used in many areas of civil engineering.As one of the main supporting forms of rock slope and underground engineering,the hollow anchor bar plays an important role for the stability of civil engineering maintenance , especially in the joints and fissures in rock mass.
The main anchoring method in a natural formation is in the form of borehole grouting, namely, hollow injection anchor. Anchorage method in the artificial filled soil anchor plate and reinforced in two ways.
When engineering decided to adopt what kind of hollow injection anchor, we need to cope with the force of the buildings and the anchoring formation properties, groundwater and other geological conditions and the overall stability of a full investigation.
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