The invention discloses a pre-explosion drilling, grouting and anchoring integrated anchor rod and construction method thereof, and belongs to
geotechnical engineering. The pre-explosion drilling, grouting and anchoring integrated anchor rod consists of a sectional type drilling anchor rod, a
drill bit and a sectional type hollow grouting
pipe, wherein the internal hollow grouting
pipe is connected with a multi-section explosive
pipe at the front end of the grouting pipe; a plurality of return stoppers are arranged on the tip of the front end of the grouting pipe, which is connected with the explosive pipe; and when the integrative anchor rod is drilled to reach a specified position, a drilling rod is taken back reversely, the internal hollow grouting pipe is pushed forwards, the return stoppers work, and then the drilling rod is stopped from being taken back. A detonating cord is connected with a
detonator to detonate explosive sections, a rubber stopper provided with a
slurry guide pipe (
exhaust pipe) follows up on the end part of the drilling rod for sealing, and a supporting liner plate, a nut and a hollow drilling rod cooperate with one another on the end part; and the supporting liner plate, through which the detonating cord penetrates, is provided with a
drill way, and one section of a pipeline penetrates through the
drill way of the supporting liner plate. The pre-explosion drilling, grouting and anchoring integrated anchor rod has the advantages that: the anchor integrates drilling, grouting and anchoring and molded in one step; the integrative anchor rod is applied to reinforcement of laneways, pit shafts and side slopes, and temporary or permanent supporting in water control; and the construction method has a certain promotion value.