The Effect Of Brain Fatigue On Sustained Attention In Coal Mine VDT Operators

With the advent of intelligent coal mine,the diversification of information makes the video terminal display(VDT)operator in coal mine enterprises need to maintain a high degree of attention in the process of operation,with the advance of working time,the mental cognitive load increases,and the operator is more likely to produce brain fatigue than before,so the level of continuous attention is affected,so as to prolong the reaction time to emergencies,affect the performan ce of homework,and also cause human errors.Through literature review,it is found that there are few studies on the relationship between brain fatigue and continuous attention,and most of them take underground miners as the research object in the field of coal mines.There is little research on brain fatigue of VDT workers in the well.In view of this,this study explored the effect of brain fatigue on continuous attention of VDT workers in coal mines based on EEG,and gave corresponding suggestions for improvement.In this paper,the coal mine VDT operators were taken as the research object.The ErgoLAB platform was used to design the EEG experiment based on SART paradigm,and the subjective and objective brain fatigue measurement method was used to measure the subjects’continuous operation task(CPT)before and after 120 min.The change of continuous attention before and after brain fatigue was studied.The corresponding subjective scale and objective physiological data were collected through the experiment,and some data were preprocessed and analyzed by SPSS26.0 software.The results showe.d that:(1)When the standard stimulus appeared in EEG experiment,the average amplitude of N100 component before and after brain fatigue was significantly different.When the bias stimuli appeared,the average amplitudes of P200 component and LPC late component before and after brain fatigue were significantly different.It indicated that the brain fatigue of VDT workers in coal mines would reduce continuous attention.(2)After continuous 120 min CPT task,the subjects felt obvious mental fatigue.Objectively,the reaction time increased,the correct rate decreased,the flash fusion frequency decreased,the heart rate increased,the skin electricity increased,the blink times increased,and the pupil diameter increased after brain fatigue.The subjective and objective data at 45 min and 90 min showed that the degree of brain fatigue was significantly changed.In conclusion,both behavioral data and EEG data have been mutually verified,which reflects that the continuous attention of coal mine VDT operators will decrease with the generation of brain fatigue.In order to reduce the operator’s brain fatigue and improve the continuous attention,this paper puts forward improvement suggestions from three aspects based on the experimental results and the current situation of coal mine VDT operation.