Estimation of Cutting Force of Rock Cutting with Conical Picks

Abstract

Abstract: Abstract： A method or formula that can accurately estimate the peak cutting force of rock cutting with conical picks is quite valuable. In this paper, formulas with a simple form and wide application and low error were created by analyzing the existing formulas and experimental data, and the relationships between peak cutting force and rock properties and the cutting depth were clarified. The peak cutting force and cutting depth follow a power law with an exponent between 1.1 and 1.5. The uniaxial compressive stress is the most important rock properties affecting the peak cutting force. The formula created in this paper was proved by experiments to be more accurate in estimating peak cutting forces compared to those existing formulas.

Key words: rock cutting, cutting force, conical pick, cutting depth, rock strength, cutting experiment

CLC Number:

TU 45

OUYANG Yiping, YANG Qi. Estimation of Cutting Force of Rock Cutting with Conical Picks[J]. Journal of Shanghai Jiao Tong University, 2016, 50(01): 35-40.

References

［1］EVANS I. A theory of the cutting force for pointattack picks ［J］. International Journal of Mining Engineering, 1984, 2(1): 6371. ［2］GOKTAN R M. A suggested improvement on Evans' cutting theory for conical bits ［C］// Proceedings of the 4th Int. Symp. On Mine Mechanization and Automation //Brisbane, Queensland, Australia: Cooperative Research Centre for Mining Technology and Equipment, 1997: 5761. ［3］ROXBOROUGH F F,LIU Z C. Theoretical considerations on pick shape in rock and coal cutting ［C］// Proceedings of the Sixth Underground Operator's Conference // Kalgoorlie, WA, Australia: Australasian Institute of Mining and Metallurgy, 1995: 189193. ［4］ACHANTI V B,Khair A W. Bit geometry effects on failure characteristics of rock ［J］. Mining Engineering, 2000, 52(6): 101107. ［5］COPUR H, BILGIN N, Tuncdemir H, et al. A set of indices based on indentation tests for assessment of rock cutting performance and rock properties ［J］. Journal of the South African Institute of Mining and Metallurgy, 2003, 103(9): 589599. ［6］BILGIN N, DEMIRCIN M A, COPUR H, et al. Dominant rock properties affecting the performance of conical picks and the comparison of some experimental and theoretical results ［J］. International Journal of Rock Mechanics and Mining Sciences, 2006, 43(1): 139156. ［7］RNMAN K E. A model describing rock cutting with conical picks ［J］. Rock Mechanics and Rock Engineering, 1985, 18(2): 131140. ［8］BAO R H, ZHANG L C, YAO Q Y, et al. Estimating the peak indentation force of the edge chipping of rocks using single pointattack pick ［J］. Rock Mechanics and Rock Engineering, 2011, 44(3): 339347. ［9］DEKETH H J R, GRIMA M A, HERGARDEN I M, et al. Towards the prediction of rock excavation machine performance ［J］. Bulletin of Engineering Geology and the Environment, 1998, 57(1): 315. ［10］BILGIN N, TUMAC D, FERIDUNOGLU C, et al. The performance of a roadheader in high strength rock formations in Küüksu tunnel ［C］∥Proceedings of the 31st ITAAITES World Tunnel Congress. Istanbul, Turkey: 2005: 815820. ［11］OKAN S, AKCIN N A. Numerical simulation of rock cutting using the discrete element method ［J］. International Journal of Rock Mechanics and Mining Sciences, 2011, 48(3): 434442. ［12］TIRYAKI B. Predicting intact rock strength for mechanical excavation using multivariate statistics, artificial neural networks, and regression trees ［J］. Engineering Geology, 2008, 99(12): 5160. ［13］TIRYAKI B, BOLAND J N, LI X S. Empirical models to predict mean cutting forces on pointattack pick cutters ［J］. International Journal of Rock Mechanics and Mining Sciences, 2010, 47(5): 858864. ［14］LIU S Y, CUI X X, DU C L, et al. Method to determine installing angle of conical point attack pick ［J］. Journal of Central South University of Technology, 2011, 18(6): 19942000. ［15］LIU Songyong, DU Changlong, CUI Xinxia. Research on the cutting force of a pick ［J］. Mining Science and Technology, 2009, 19(4): 514517. ［16］李晓豁, 尹伯峰,李海滨. 镐型截齿的截割试验研究［J］. 辽宁工程技术大学学报(自然科学版), 1999, 18(6): 649652.LI Xiaohuo, YIN Baifeng, LI Haibin. Experimental researches on cutting with conical picks ［J］. Journal of Liaoning Technical University(Natural Science), 1999, 18(6): 649652. ［17］刘春生,宋杨. 不同楔入角的镐齿破岩截割力模型与仿真［J］. 黑龙江科技学院学报, 2012, 22(3): 325330. LIU Chunsheng,SONG Yang. Development and simulation of cutting force model on conical pick cutting rock at different wedge angles ［J］. Journal of Heilongjiang Institute of Science and Technology, 2012，22(3):325330. ［18］GOKTAN R M,GUNES N. A semiempirical approach to cutting force prediction for pointattack picks［J］. Journal of The South African Institute of Mining and Metallurgy, 2005, 105(4): 257263.

[1]	LEI Xuelin *(雷学林), SHI Yukai (史玉凯), HE Yun (何云). Comparative Study on Cutting Performance of Chaser and Triangle-Shaped Inserts in Inconel 718 Turning [J]. Journal of Shanghai Jiao Tong University (Science), 2019, 24(3): 388-394.
[2]	OUYANG Yiping，YANG Qi,MA Jian,QIU Yiping. Effects of Rake Angle on Linear Rock Cutting with Chisel Picks [J]. Journal of Shanghai Jiaotong University, 2018, 52(11): 1422-1428.
[3]	LI Guilong,DU Shichang. Modeling and Analyzing for Stream of Variations in#br# Multistage Manufacturing Processes of Cylinder Block [J]. Journal of Shanghai Jiaotong University, 2017, 51(4): 385-.
[4]	OUYANG Yiping,YANG Qi. Numerical Simulation of Rock Cutting in 3D with SPH Method and Estimation of Cutting Force [J]. Journal of Shanghai Jiaotong University, 2016, 50(01): 84-90.