Evaluation of Cutting Performance of a TBM Disc Cutter and Cerchar Abrasivity Index Based on the Brittleness and Properties of Rock

被引：10

作者：

Jeong, Hoyoung ^{[1
]}

Choi, Seungbeom ^{[2
]}

Lee, Yong-Ki ^{[3
]}

机构：

[1] Pukyong Natl Univ, Dept Energy Resources Engn, Busan 48513, South Korea

[2] Korea Atom Energy Res Inst KAERI, Disposal Safety Evaluat R&D Div, Daejeon 34057, South Korea

[3] Korea Atom Energy Res Inst KAERI, Disposal Performance Demonstrat R&D Div, Daejeon 34057, South Korea

来源：

APPLIED SCIENCES-BASEL | 2023年 / 13卷 / 04期

基金：

新加坡国家研究基金会;

关键词：

cutter force; specific energy; Cerchar abrasiveness index; rock brittleness; TBM disc cutter; ABRASIVENESS INDEX; PREDICTION MODEL; CASE-HISTORY; METHODOLOGY; STRENGTH; TESTS; WEAR; CAI;

D O I：

10.3390/app13042612

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The brittleness of rock is known to be an important property that affects the fragmentation characteristics of rock in mechanized rock cutting. As the interaction between the cutting tool and the rock (i.e., cutter forces, cutting efficiency, s/p ratio, and abrasivity) during mechanical rock cutting is strongly influenced by the characteristics of rock fragmentation, the cutting tools (i.e., disc cutter and pick cutter) experience different cutting behaviors depending on the rock brittleness. In this study, the relationships between the rock brittleness and the abrasivity of rock, and the cutting efficiency of a Tunnel Boring Machine (TBM) disc cutter were investigated for Korean rock types. The brittleness was calculated by the mathematical relations between the uniaxial compressive and Brazilian tensile strengths of the rock. The cutting efficiency and abrasivity were evaluated by the cutter forces and specific energy from the linear cutting machine (LCM) test and the Cerchar abrasivity index (CAI) test, respectively. The results show that rock brittleness is significantly correlated with cutting efficiency and CAI values. Consequently, some prediction models for cutter forces, specific energy, and the CAI were proposed as functions of the rock brittleness.

引用

页数：16

共 48 条

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