Experimental and theoretical design for decreasing wear in conical picks in rotation-drilling cutting process

Yang, Dong‐Yeol; Li, Jianping; Wang, Liping; Gao, Kuidong; Tang, Youhong; Wang, Yanxiang

doi:10.1007/s00170-014-6472-5

Cited by 54 publications

(20 citation statements)

References 11 publications

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“…Therefore, there is an optimal cutting angle, which can produce a large rock breaking force. This is consistent with the conclusion of the reference(Yang et al 2015).…”

supporting

confidence: 94%

Single Pick Cutting Rock Load Identification Based on Improved Regularization Method

Dong

Zhai

Wang

et al. 2020

Preprint

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To explore the relationship between the cutting vibration and the cutting load of a single pick, this paper studied a new method for a single pick cutting rock load identification. This paper improved the low accuracy problem of the regularization method in the inverse process of frequency response function in the traditional load identification method by introducing a filter operator. By combining the inverse pseudo excitation method and the improved regularization method, the identification of the load dependent on the vibration signal was realized. A single pick cutting rock test equipment was built, which could simulate the actual working conditions of pick cutting rock in underground or tunnel. By changing cutting speed, cutting angle, cutting line spacing and cutting depth of the single pick, the change trends of real cutting load and identification load were obtained. The load identification method proposed in this paper was consistent with the change trend of the real load under the single pick cutting state. Therefore, the method had good recognition accuracy and the maximum load recognition error was 17.35%. Compared with the traditional load identification method, the identification error was reduced by a maximum of 1.98%. This method can identify the cutting load of single pick and modify the morbidity problem of frequency response function matrix. The method has a better recognition effect on the cutting load of the pick than the traditional recognition method. The research could benefit for the design of the cutting system and the arrangement of the pick on the coal mine or tunneling machinery.

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“…Therefore, there is an optimal cutting angle, which can produce a large rock breaking force. This is consistent with the conclusion of the reference(Yang et al 2015).…”

supporting

confidence: 94%

Single Pick Cutting Rock Load Identification Based on Improved Regularization Method

Dong

Zhai

Wang

et al. 2020

Preprint

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“…For a traditional roadheader, increasing the cutting power is an effective approach to improve cutting ability, but at the same time, the wear of the pick will increase [30]. Conical pick edge damage and tip separated of roadheader in the traditional roadway excavation are presented in Figures 1(a) and 1(b), respectively.…”

Section: Proposal Of New Cutting Methodmentioning

confidence: 99%

Experimental and Numerical Studies on Rock Cutting with Saw Blade and Conical Pick Combined Cutting Method

Zeng

Wang

et al. 2019

Mathematical Problems in Engineering

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In the rock cutting process, conical pick wear is often encountered. In order to restrain this condition, a saw blades and conical pick combined cutting method was put forward. Saw blades were employed to slit the rock for increasing the free surface, and then the conical pick was used to break the rock. To research the cutting performance of the new cutting method, the corresponding experimental device and a three-dimensional finite element model are established. In order to obtain crack propagation and fragment separation and to study the fracture process of the rock plate, a damage constative model and failure mechanism were combined in the numerical model. The mechanical tests were carried out to achieve the mechanical parameters of the rock. To investigate different parameters affecting rock plate cutting performance, experiments with different compressive strengths, physical parameters, and cutting depths were carried out. Moreover, the confining pressures affecting the cutting performance were adopted to simulate deep mining conditions. The experimental results demonstrated that the peak cutting force shows the exponential positive correlation with compressive strength, thickness of the rock plate, and cutting depth of the conical pick, and exhibits the exponential positive correlation with rock plate height and width. Besides, the numerical simulation results show that peak cutting force and confining pressure have a binomial relationship.

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“…Increasing the cutting power is an effective method for improving the cutting ability of the tunneling machine for cutting hard rock [16]. But on the contrary, the cutting tool wear would aggravate with the increase of cutting power as shown in Figure 1(a).…”

Section: Proposal Of the New Rock Cutting Methodsmentioning

confidence: 99%

“…x , l z , l y = 500 mm,16 mm, 200 mm Force (kN) (b) Sandstone 1 Speed = 3 m/s θ = 10°l x , l z , l y = 500 mm, 16 mm, 200 mm x , l z , l y = 500 mm, 16 mm, 200 mm Force (kN) (d) Sandstone 1 Speed = 3 m/s θ = 30°l x , l z , l y = 500 mm, 16 mm, x , l z , l y = 500 mm, 16 mm, 200 mm Force (kN) (f)…”

mentioning

confidence: 99%

Numerical Simulation of Rock Plate Cutting with Three Sides Fixed and One Side Free

Wan

Zeng

et al. 2018

Advances in Materials Science and Engineering

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In order to overcome conical pick wear in the traditional rock cutting method, a new cutting method was proposed on account of increasing free surface of the rock. The mechanical model of rock plate bending under concentrated force was established, and the first fracture position was given. The comparison between experimental and numerical results indicated that the numerical method is effective. A computer code LS-DYNA (3D) was employed to study the cutting performance of a conical pick. To study the rock size influenced on the cutting performance, the numerical simulations with different thickness, width, and height of a rock plate was carried out. The numerical simulation with the different cutting parameters of cutting speed, cutting angle, and cutting position influenced on cutting performance was also carried out. The numerical results indicated that the peak force increased with the increasing thickness of rock plate. With the increasing width and height of the rock plate, the peak force decreased and then became stable. Besides, the peak force decreased with the increasing of cutting position lxp/lx. Moreover, the peak force increased and then decreased with the increasing of cutting angle. The cutting speed has nonsignificant influence on the peak force. The strong exponential relationship was obtained between the peak force and cutting position, thickness, height, and width of the rock plate at a confidence level of 0.95. A binomial relationship was observed between the peak force and cutting angel. The cutting force comparison between traditional rock cutting and rock plate cutting indicated that the new cutting method can effectively reduce peak cutting force.

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Experimental and theoretical design for decreasing wear in conical picks in rotation-drilling cutting process

Cited by 54 publications

References 11 publications

Single Pick Cutting Rock Load Identification Based on Improved Regularization Method

Single Pick Cutting Rock Load Identification Based on Improved Regularization Method

Experimental and Numerical Studies on Rock Cutting with Saw Blade and Conical Pick Combined Cutting Method

Numerical Simulation of Rock Plate Cutting with Three Sides Fixed and One Side Free

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