掘进机破岩产尘机理及影响因素分析探讨

Analysis and Discussion of Dust Make Mechanism and Influence Factors of Rock Breaking Using Roadheaders

以截齿破岩机理为基础,分析了截齿破岩产尘机理及影响因素,并把影响因素划分为静态影响因素和动态影响因素。静态影响因素包括镐形截齿锥角、切削角以及切削速度等,切削厚度是影响产尘量最重要的可控动态影响因素。研究发现产尘量与切削比能耗密切相关。着重研究了切削厚度对切削破岩产尘及能耗的影响,结果表明:切削厚度产尘量和切削比能耗的影响规律非常相似,随着切削厚度的增大,产尘量和切削比能耗都以幂函数减小,最后对截割厚度的合理值进行了初步的探讨。这些结果对掘进机的设计选型以及现场应用能提供很好的理论指导。

Based on the rock cutting mechanism of conical picks, the dust make mechanism and influencing factors of rock cutting using roadheaders were analysed in detail, and influencing factors were classified into two categories： static factors and dynamic factors. Static factors include the cone angle of picks, the attack angle and cutting speed, etc. The cutting depth is an important controllable dynamic factor on dust make in the process of rock cutting. It is found that dust make is also closely related with the specific cutting energy. The effects of cutting depth on dust make and specific cutting energy were then studied in detail. The results indicate that the effect laws of cutting depth on dust make and specific cutting energy are extremely similar, namely they all decrease in power function with the increase of cutting depth. Finally, the reasonable value of the depth of cut was also discussed. The conclusions of this study can provide theoretical supports for design, model selection and field application of roadheaders.