120.55
ICV 2016
8
MNiSW
 
 

Finite element analysis of load characteristic of shield bolter miner cutting head under complex coal seam condition

Shuo Qiao 1  ,  
Yimin Xia 2,  
Zaizheng Liu 3,  
Jinshu Liu 3,  
Bo Ning 4,  
 
1
Central South University
2
Institute of Light Alloy, Central South University
3
China Railway Construction Heavy Industry Co., LTD
4
State Key Laboratory of High Performance Complex Manufacturing
Mining Science 2017;24:85–97
KEYWORDS:
TOPICS:
ABSTRACT:
Aiming at the complex conditions of the first shielded bolter miner in the actual work, the mechanical model of bolter miner cutting head was established. Based on cutting mechanism of the conical pick and the cutting head, the cutting head load and torque analysis model under complex coal seam were established. The dynamic characteristics of load and torque in the process of cutting head are analyzed under three different working conditions of cutting roof-coal layers, coal-floor layers and coal seam by finite element method. The results show that when the damage variable D=1, the coal-rock completely lacks the bearing capacity, and it forms arc-shaped crushing groove on the coal-rock. The large difference of torque between roof-coal layers and the roof-coal layers in the conical pick is 112N•m, which indicates that the cutting head has the best performance with cutting the coal seam first and then cutting the rock. In the process of excavation, the load fluctuation coefficient of cutting the coal-floor layers and roof-coal layers is about 1.2 times of that of the coal seam. The results can provide a reference for the efficient cutting and performance evaluation of the bolter miner.
CORRESPONDING AUTHOR:
Shuo Qiao   
Central South University, Institute of Light Alloy, Central South University, Changsha, 410083 Changsha, China
 
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