Numerical Investigation of Rock Cutting Modes with Conical Picks under Different Confining Pressures and Cutting Spaces

被引：0
作者：
Shuo Qiao
Yao Wu
Zongming Zhu
Zhengqi Zhang
Liwen Lu
机构：
[1] Changsha University,College of Mechanical and Electrical Engineering
[2] National University of Defense Technology,College of Intelligence Science and Technology
来源：
Arabian Journal for Science and Engineering | 2022年 / 47卷
关键词：
Conical pick; PFC; Confining pressure; Crack growth; Cutting mode;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
This paper focuses on the mechanism of rock cutting with conical picks under different confining pressures. First, the 2-dimensional numerical model of rock cutting with two conical picks is established by particle flow code software. Then, the basic contents of cutting modes, cutting efficiency, optimal cutting space, rock fragmental size and crack growth ability are studied. Finally, the cutting modes are verified by cutting experiments. According to the results, the confining pressure directly affects the crack growth ability, it presents four basic cutting modes for different crack growth abilities, mode a, mode b, mode c and mode d, respectively. And they influence the cutting efficiency, optimal cutting space, cutting force and crack growth ability. At no confining pressure, the optimal cutting space is 70 mm, the optimal cutting space is 90 mm under 5 MPa and 10 MPa conditions. The research can provide some reference and guidance for continuous miner construction in different confining pressure environments.
引用
收藏
页码：4559 / 4569
页数：10
相关论文
共 67 条
[1]  
Xie HP(2019)Research review of the state key research development program of China: deep rock mechanics and mining theory J. China Coal Soc. 44 1283-1305
[2]  
Wen S(2018)An experimental study of temperature at the tip of point-attack pick during rock cutting process Int. J. Rock Mech. Min. Sci. 107 39-47
[3]  
Li XS(2018)Investigations into tilt angles and order of cutting sequences for cutting head design of roadheaders Tunn. Undergr. Space Technol. 76 160-171
[4]  
Sun Y(2015)Numerical research on rock breaking performance of water jet based on SPH Powder Technol. 286 181-192
[5]  
Hekimoglu ZO(2016)Determination of optimum tool for efficient rock cutting Geotech. Geol. Eng 34 1257-1265
[6]  
Liu XH(2016)DEM modeling of a monowire cutting system Arab. J. Geosci. 9 739-293
[7]  
Liu SY(2018)3D numerical modelling of rock fracture with a hybrid finite and cohesive element method Eng. Fract. Mech. 199 280-130
[8]  
Ji HF(2018)Investigation on the influence mechanism of rock brittleness on rock fragmentation and cutting performance by discrete element method Measurement 113 120-4159
[9]  
Samui P(2017)Effect of pick working angle on the cutting performance of a cutting head J. Braz. Soc. Mech. Sci. Eng. 39 4147-86
[10]  
Kumar R(2016)Numerical simulation of rock cutting in deep mining conditions Int. J. Rock Mech. Min. Sci. 84 80-48
1234567