Status and prospect of key technologies of intelligentization of fully-mechanized coal mining face

Intelligentizationof fully-mechanized coal mining face is one of key development directions of coal mining in China. In the fully- mechanized coal mining face, the environment is complex with many pieces of equipment, the steps of the mining process couple serious¬ly, and the actions of the equipment should be executed collaboratively when mining the coal, which brings an enormous challenge to the intelligent control of equipment. This paper aims to clarify status of intelligent technology in the fully-mechanized coal mining face, ex¬plore way to solute technical problems, and discuss future development direction. The development history and technical status forintelli- gentization fully-mechanized coal mining face are reviewed around the core equipment such as shearer, hydraulic support group, liquid supply system, and transportation system. In industrial application, the system structure and key technologies of current intelligent fully- mechanized coal mining face are introduced, and the technical difficulties are analyzed. From a standpoint of cybernetics, the scientific is¬sues in the intelligentization fully-mechanized coal mining face, such as shearer drum adjustment, attitude control and moving automati¬cally with the shearer of hydraulic support,straightness adjustment of the working face, and coordination control of the equipment, are de¬scribed emphatically. The technological path and research status both overseas and domestic are introduced addressed to these issues from system modeling, control algorithm, and optical decision. Finally, the prospects of intelligent development direction of shearer, hydraulic support, and transportation system are given according to the development trend of artificial intelligence. Furthermore, combined with re¬search results of computer vision, three-dimensional laser point cloud technology, big data analysis, multi-agent control and decision making, etc., this paper discusses intelligent technologies in aspects of video target recognition and tracking, 3D attitude perception of key equipment, geological information acquisition and modeling of transparent working face, comprehensive diagnosis of equipment faults, infor¬mation mining and intelligent analysis of working face, and intelligent optimal control of equipment group in fully-mechanized coal mining face. © 2021 China Coal Society. All Rights Reserved.