Estimating the mean cutting force of conical picks using random forest with salp swarm algorithm

被引:15
作者
Zhou, Jian [1 ]
Dai, Yong [1 ]
Tao, Ming [1 ]
Khandelwal, Manoj [2 ]
Zhao, Mingsheng [3 ]
Li, Qiyue [1 ]
机构
[1] Cent South Univ, Sch Resources & Safety Engn, Changsha 410083, Peoples R China
[2] Federat Univ Australia, Inst Innovat Sci & Sustainabil, Ballarat, Vic 3350, Australia
[3] Poly Xianlian Blasting Engineer Ltd Corp, Guiyang 550002, Guizhou, Peoples R China
基金
美国国家科学基金会;
关键词
Rock cutting; Mean cutting force; Conical pick; Machine learning; Salp swarm algorithm; Random forest; NUMERICAL-SIMULATION; INDENTATION TESTS; ROCK; PREDICTION; PERFORMANCE; PARAMETERS; REGRESSION; OPTIMIZER;
D O I
10.1016/j.rineng.2023.100892
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Conical picks are widely used as cutting tools in shearers and roadheaders, and the mean cutting force (MCF) is one of the important parameters affecting conical pick performance. As MCF depends on a number of parameters and due to that the existing empirical and theoretical formulas and numerical modelling are not sufficient enough and reliable to predict MCF in a proficient manner. So, in this research, a novel intelligent model based on a random forest algorithm (RF) and a heuristic algorithm called the salp swarm algorithm (SSA) have been applied to determine the optimal hyper-parameters in RF, and root mean square error is used as a fitness function. A total of 188 data samples including 50 rock types and seven parameters (tensile strength of the rock at, compressive strength of the rock ac, cone angle O, cutting depth d, attack angle y, rake angle a and backclearance angle fi) were collected to develop an SSA-RF model for mean cutting force prediction. The prediction results of the SSA-RF model were compared with seven influential formulas and four classical models, such as random forest, extreme learning machine, support vector machine and radial basis function neural network. The mean absolute error (MAE), root mean square error (RMSE), mean absolute percentage error (MAPE) and Pearson correlation coefficient (R2) were employed as evaluation indexes to compare the capability of different predicting models. The MAE (0.509 and 0.996), RMSE (0.882 and 1.165), MAPE (0.146 and 0.402) and R2 (0.975 and 0.910) values between measured and predicted MCF for training and testing phases of the SSA-RF model clearly demonstrate the superiority in prediction compared to the other tools. A sensitivity analysis has also been performed to understand the influence of each input parameter on MCF, which indicates that src, d and at are the most important variables for MCF prediction.
引用
收藏
页数:12
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