Key technologies of multi-parameter accurate perception and security decision in intelligent working face

Intelligent mining is a new development stage of fully mechanized mining technology in China,and it is also the demand and inevitable direction of the technological revolution and upgrading development of coal industry. Focu- sing on the present situation and development trend of intelligent mining technology and coal mine safety monitoring technology,this paper introduces the technical connotation and three key elements of intelligent mining,and points out that intelligent sensing is the key technology of intelligent mining in coal mine,and sensing technology is the core of intelligent mining. In view of the problems of incomplete information collection, poor reliability, low sensitivity and backward security decision technology in intelligent mining sensing layer of coal mine,based on the concepts of “sci- entific mining” and “precision coal mining”,the key technology system of multi-parameter accurate perception and se- curity decision of mining information in intelligent working face is established,the precise sensing principle and char- acteristics of FBG are studied,the three-layer sensing transfer model of surface-bonded FBG on the structure is con- structed,the strain distribution law of FBG in bonded length is revealed,the multi-parameter information sensing sys- tem with FBG sensing technology for the safety state of roadway surrounding rock and the attitude of working face e- quipment is established,the large-capacity and quasi-distribution sensing network topology based on FBG intelligent sensing technology is proposed,the multi parameter sensing system information service platform based on big data and cloud computing intelligent technology is developed,and the four-layers system architecture including data acquisition and sensing layer,data transmission layer,data processing and management layer,security decision and control layer are constructed. The application of multi-parameter sensing and decision system based on FBG in coal mining is car- ried out,which realizes the monitoring and prediction of production status,mine pressure information and risk informa- tion,and provides a decision support for coal mine safe production and management.