Research On Boom-type Roadheader Dynamics

According to the different tunneling ways, there are two kinds of roadheader: Tunne -lling Boom Machine and partial-size tunneling machine. This paper mainly discussed the vertical axis part-size tunneling machine, it has been widely used in underground coal mine laneway excavation today.There are mainly three parts in this paper. In the first part, this paper based on the type of EBJ-132A, its main analyzed mechanism and working procedure of cutt -ing part , according to the different laneway profiles ,and derivated the formula that related to the boom-type roadheader's correlative working parameter and the dimen -sion of the laneway. In the second part ,this paper analysis the vibra cutting mechanism of roadheader..Through dynamic analysis of the mechanism, drew the movement relationship between velocity of vibra cutting head and input torque of central gear, offered theoretical foundation for analyzing dynamic characteristic of vibra cutting mechanism and designing the mechanism。In the third part of paper, according to the stress state influenced on the picks of cutting head on boom roadheader in different operation conditions, the matched relation between the oscillating force and cutting force of cutting head as well as its general value selection range are studied in order to provide theoretical basis of designing swing mechanism of boom roadheader.