Effects of cut depth and cut spacing on tool forces acting on a conical pick in rock cutting
LIANG Yunpei1, WANG Xiang1,2，WANG Qingfeng2
1. State Key Lab for Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China;
2. Chongqing Research Institute, China Coal Technology Engineering Group, Chongqing 400039, China
Abstract：Effects of cut depth and cut spacing on tool forces acting on a conical pick were investigated based on rock cutting tests conducted on a sandstone using a linear rock cutting machine. Single factor regression showed that linear fitting and power function one can all be used to statistically describe the relation among cutting force, normal force and cut depth; cutting force and normal one increase with increase in cut depth, the ratio of normal force to cutting one linearly decreases with increase in cut depth; cutting force and normal one linearly increase with increase in cut spacing, the ratio of normal force to cutting one deceases with a power function form; load fluctuation coefficients linearly decrease with increase in the ratio of cut spacing to cut depth. Multi-factor linear regression showed that there are extremely strong statistical relationships among cutting force, normal force and cut depth, cut spacing; there are significant statistical relationships among load fluctuation coefficients and cut depth, cut spacing; meanwhile, load fluctuation coefficients are proportional to cut depth, and inversely proportional to cut spacing. Performance comparison indicated that the theoretical model of Evans has a better performance to predict cutting force values than the model of Roxborough and Liu, and the model of Goktan do.
梁运培1，王想1,2，王清峰2. 截割厚度与截线距对镐型截齿破岩力学参数的影响[J]. 振动与冲击, 2018, 37(3): 27-33.
LIANG Yunpei1, WANG Xiang1,2，WANG Qingfeng2. Effects of cut depth and cut spacing on tool forces acting on a conical pick in rock cutting. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(3): 27-33.
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