Safety Prediction of Coalface Stray Current Based on BP ANN

In order to realize safety prediction of workface stray current, it´s important to confirm the characteristic indexes of workface stray current so as to insure the time margin and reliability of prediction. By analyzing the resistance distribution network of the system, the paper confirms the four parameters as follows to be the characteristic indexes of coalface stray current safety prediction: the leakage current of contacting line, resistance of insulating splint, the distance between workface and subtraction substation and the stray voltage of contacting line. After that, the thesis built safety prediction model of coalface stray current danger grade with ANN as its core, chose the field measured data to do the training and prediction of safety prediction model and complete the designing and development of monitoring and predicting system of stray current. The results indicate that the proposed safety prediction model and the prediction system has strong applicability, it shows good effect.