Multistage energy absorption anchor rod and construction method thereof

• Main Authors: WANG ZISHENG, ZHANG YING, WANG GUOYING, JIA HOUXING, ZHI GUANGHUI, ZUO DI, FU MENGXIONG, LIU SHAOWEI
• Format: Patent
• Language: Chinese; English
• Published: 02.03.2021
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

The invention relates to a multistage energy absorption anchor rod and a construction method thereof. The multistage energy absorption anchor rod comprises an energy absorption anchor rod assembly andan energy absorption tray assembly. The energy absorption anchor rod assembly comprises a head anchor rod, a tail anchor rod, a threaded energy absorption piece, a cake-shaped energy absorption pieceand a circular protection barrel. The energy absorption tray assembly comprises an anchor cable tray, a first large conical energy absorption barrel, a pressure-resistant plate, a second large conical energy absorption barrel and an anchor rod butterfly-shaped tray which are sequentially arranged from top to bottom and sleeve the outer side of the tail anchor rod, small conical energy absorptionbarrels are welded into the first large conical energy absorption barrel and the second large conical energy absorption barrel, V-shaped notches are circumferentially formed in the round face ends ofthe large conical energy abs