Detachable anchor rod

The utility model discloses a detachable anchor rod which comprises an anchor rod body, a base plate and nuts, the anchor rod body comprises a detachable section and a permanent inner anchoring section which are directly connected or connected by a connecting sleeve, and the detachable section is detachably connected with the permanent inner anchoring section or the connecting sleeve; the base plate and the nuts are sleeved on the detachable section in a penetrating way, an isolated protecting sleeve pipe for completely coating the part of the detachable section is sleeved on the anchor rod body in a penetrating way, wherein the part of the detachable section is positioned at one side of the base plate deviating from the nuts, one end of the isolated protecting sleeve pipe is matched with the base plate, and the other end of the isolated protecting sleeve pipe is connected with the connecting sleeve or the permanent inner anchoring section in a sealing way. The detachable section of the anchor rod body sleeved with the base plate is isolated from a grouting body by the isolated protecting sleeve pipe (the anchor rod body is also provided with a syrup stopping plug in a hollow state), after the anchor rod is anchored, all parts outside the anchor rod body can be removed, the permanent inner anchoring section is reserved and fully bonded with peripheral surrounding rock, pressing stress is delivered to a peripheral bottom layer, therefore, the stratum of the detachable section can be excavated.