15:15-17:15　ポスター発表（地球・資源分野） ［9/11(水) PM ポスター発表会場］

[P087A] 単一ボタンビットを用いたエッジチッピング試験による岩石切削効率の最適化の検討

○宋 佳承^{1[博士課程]}、羽柴 公博¹、福井 勝則¹ (1. 東京大学)

キーワード：エッジチッピング、ボタンビット、岩石切削

In mining and tunneling, the efficiency and cost-effectiveness of rock breakage depend on tools like cutting picks, disc cutters, and drilling bits, making it essential to evaluate their performance and durability. However, traditional cutting and drilling tests are resource-intensive and time-consuming. This study explores the use of edge chipping tests, typically used to assess the toughness of brittle materials, as an alternative method for estimating the peak forces and energy consumption involved in rock cutting. By pressing a single button bit into a rock block near its edge, the study examines the effects of bit size (bit diameter of 6 mm, 8 mm and 15 mm), and cutting distance from the edge on test outcomes, including rock chip size, peak loading force, bit penetration depth, and force-penetration curves. The findings provide valuable insights into the relationship between rock properties, tool dimensions, and test conditions, contributing to the design and optimization of more efficient rock cutting machines.