Directional control of top hammer drilling

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K14521
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Earth system and resources engineering
• Research Institution: The University of Tokyo
• Principal Investigator: Hashiba Kimihiro 東京大学, 大学院工学系研究科(工学部), 准教授 (60456142)
• Co-Investigator(Kenkyū-buntansha): 福井 勝則 東京大学, 大学院工学系研究科(工学部), 教授 (70251361)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: トップハンマードリリング / 打撃穿孔 / さく岩機 / ボタンビット

Outline of Final Research Achievements

In this study, the relation between force and penetration of a bit during top hammer drilling was modeled, and then a high-precision simulator for top hammer drilling was constructed by combining the proposed model and the models for a drill body, piston, rods, and rod joints. The effects of various drilling conditions on the drilling process were clarified using this simulator. In addition, a laboratory test method for understanding the effects of shape and location of button tips on the bit was examined, which is significant for the directional control of top hammer drilling.

Free Research Field

地球・資源システム工学