夹矸煤层条件下硬岩掘进机刀盘结构优化

Optimization of cutterhead structure of hard rock roadheader in coal seam with gangue

为更准确地获得硬岩掘进机在夹矸煤层掘进过程中刀盘的受力情况,基于EDEM软件建立岩层夹矸模型,并联合ANSYS有限元分析软件对刀盘截割不同岩石工况进行受载分析,并采用ANSYS软件的Design Explorer模块对刀盘结构参数进行优化设计.研究结果表明,随着夹矸层比例的增大,硬岩掘进机刀盘承受的载荷越大,即需要提供的驱动载荷越大;随着夹矸层位置越靠近刀盘中心,硬岩掘进机刀盘承受的载荷越小,即需要提供的驱动载荷越小.通过优化设计使得刀盘最大等效应力比优化前应力值降低了77.3%;其最小寿命比优化前提高了85.6%,在很大程度上可以确保刀盘的安全使用性能.研究结论更好的模拟硬岩掘进机实际掘进时可能会遇到的多种复杂地质条件工况,解决传统分析时截割岩石属性单一等问题,为硬岩掘进机刀盘设计和改进提供依据.

In order to obtain the stress of the cutterhead of the hard rock roadheader in the process of the coal seam with gangue,the model of the rock strata with gangue is established based on the EDEM software,and the load analysis of the cutterhead cutting different rock conditions is carried out by combining the ANSYS finite element analysis software,and the Design Explorer module of the ANSYS software is adopted to optimize the structure parameters of cutterhead.The results show that with the increase of the proportion of the gangue layer,the greater the load on the cutterhead of the hard rock tunneller,the greater the driving load that needs to be provided;with the position of the gangue layer closer to the center of the cutterhead,the smaller the load on the cutterhead of the hard rock tunneller,the smaller the driving load that needs to be provided.Through the optimization design,the cutterhead maximum equivalent stress is 77.3%lower than that before optimization,and its minimum life is 85.6%higher than that before optimization,which can ensure the safe use performance of cutterhead to a large extent.The research conclusion is better to simulate the complex geological conditions that may be encountered in the actual driving of hard rock tunneller,solve the problem of single cutting rock attribute in traditional analysis,and provide a basis for design and improvement the cutterhead of hard rock tunneller.