Type characteristics and research direction of automatic bolting frame

Bolt support ability is one of the bottleneck problems that restrict the speed and safety of roadway excavation, as well as the development of unmanned and intelligent roadway excavation. Anchor drilling robot is the only way to solve the problem of bolting, its core part is automatic bolting frame. In order to systematically sort out the technology roadmap of automatic bolting frame and summarize the common structure of key components, the paper introduces the characteristics, technical level and applicable working conditions of automatic bolting frame at home and abroad, and the research emphases and development direction of automatic bolting frame technology are pointed out. Firstly, in terms of layout,the foreign automatic bolting frame is divided into turret, switching and self-drilling, the drilling power,rotary torque, bolt storage quantity and performance characteristics of bolting frame are introduced in detail; and on that basis,the layout and performance parameters of domestic automatic bolting frame are summarize; the disadvantages of domestic automatic bolting frames are compared from two aspects of function and driving element quantity. Secondly, the types of each component of automatic bolting frame structure are systematically described: drilling, anchoring agent injecting, bolting, bolt cartridge, the working principles and structural characteristics of each component are described. Finally, based on the comparative analysis of the domestic and international automatic bolting frame, the development ideas and research directions of automatic bolting frame are put forward according to the status of bolting technology in coal mine roadway in China: study on sensor and driving element of automatic bolting frame; study on automatic bolting frame intelligent control technology; study on applicability of automatic bolting frame and drilling tool; study on modularization and serialization of automatic bolting frame, etc. Development of automatic bolting frame technology will be help drilling, resin injecting, bolting collaborative operation, achieve mechanical automatic bolting, and ultimately achieve the goal of intelligent and unmanned coal mine roadway heading face.