Rock breaking mechanism of rolling cutter of new gravity vertical shaft continuous heading machine

被引：0

作者：

Chen X. ^{[1
,2
]}

Zhang J. ^{[1
,2
]}

Jiao H. ^{[1
,2
]}

Li Z. ^{[1
,2
]}

Du F. ^{[3
]}

Yang L. ^{[1
,2
]}

Zhang B. ^{[1
,2
]}

机构：

[1] Henan Key Laboratory of Underground Engineering Disaster Prevention, Henan Polytechnic University, Jiaozuo

[2] State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization, Henan Polytechnic University, Jiaozuo

[3] School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo

来源：

Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2022年 / 39卷 / 03期

关键词：

Finite element analysis; New gravity vertical shaft continuous heading machine; Rock breaking mechanism; Rolling cutter; Specific energy;

D O I：

10.13545/j.cnki.jmse.2021.0300

中图分类号：

学科分类号：

摘要：

To change shaft excavation mode and improve rock breaking efficiency, a new type of gravity shaft continuous heading machine was developed. Dynamic rock breaking process of pick rolling and torsion embedded in rock at different speeds was simulated with SolidWorks for modeling and HyperMesh and LS-DYNA for finite element analysis. Through similar concrete breaking test of rolling cutter of gravity shaft continuous heading machine, the rock breaking test of pick under dynamic condition was carried out to explore rock breaking mechanism. The results have shown that rock breaking specific energy of the cutter is lower when optimal rotation speed of the drum is 30 r/min, which can increase the change of internal stress in the rock, weaken bearing capacity of rock internal structure, increase generation and expansion range of rock cracks, and finally lead to the rock depression failure. Combined with similar concrete breaking test of rolling cutter of gravity shaft continuous heading machine, the damage degree of concrete in the same time was analyzed, which has proved that the optimal drum rotation speed is 30 r/min, which can verify the accuracy of numerical simulation. The research and development of new gravity vertical shaft continuous tunneling can innovate existing shaft excavation methods, especially for gravel, frozen soil, medium and low strength rock strata. © 2022, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.

引用

页码：576 / 583and597

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