摘要
对掘进机截割过程的机理进行了研究,对煤炭和岩石的性质对截割载荷的影响进行了深入分析。针对使用传统计算方法计算截割过程中的截割载荷存在的缺陷,提出了有限元模拟方法,模拟动态截割过程,并进行试验。提取了多种不同煤岩的坚固性系数,并制取相应的硬度煤层,以分析不同性质的煤岩对截割载荷的影响,并推导了三向力与坚固性系数之间的关系。通过对比分析发现,对截割载荷的理论公式推导、模拟分析、试验三者的结果相吻合。结果表明,仿真与试验分析不仅提供了可靠的截割载荷的精确计算方法,而且也提供了针对不同地质条件的煤岩选择合适的截齿的参考依据。
The mechanism of roadheader cutting process was studied,and the influences of coal and rock properties on the cutting load were deeply analyzed. Aimi at the defects of traditional calculation method of cutting load during the calculation process,the finite element method was proposed to simulate the dynamic cutting process. And the experiment was performed. The different coal and rock firmness coefficients were extracted,and the corresponding coal seam hardness was made to analyze the influence of different coal and rock properties on the cutting load. The relationship between three-axis force and firmness coefficient was derived. The comparison analysis of cutting load simulation results,theoretical formula and experiment showed that these three results were matched. The results showed that the simulation and experiment analysis not only provided a reliable precise calculation method of cutting load,but also offered the reference of cutting tooth selection with different geological conditions of coal or rock.
出处
《机械设计》
CSCD
北大核心
2016年第5期75-79,共5页
Journal of Machine Design
关键词
截割载荷
有限元法
坚固性系数
三向力
cutting load
finite element method
firmness coefficient
three-axis force
