Design and Verification of Cutting Head of Drilling-Assisted Hard-Rock Tunneling Machine
Based on the EBZ200H hard rock roadheader,the design of cutting head for drilling-assisted hard rock tunneling was described in detail,including key parameters and procedure.Aiming at the new hard rock excavation technology of drilling-assisted cutting,some improvement ideas were also put forward for the corresponding design of hard rock excavation cutting head too.Finally,the standard cutting head and the improved cutting head were both used to cut the simulated rock wall poured with No.35 commercial concrete.The test results show that the efficiency of the improved cutting head is about 143%of that of the stan-dard cutting head.This work will provide an important reference for the follow-up study of the new high-efficiency drilling as-sisted hard rock cutting technology.
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