Research On The Technology And Effect Prediction Models Of High Bench Cast Blasting

Heidaigou opencast mine, the first opencast mine which introduced the method of deep-hole high bench cast blasting into China, have been implement the first cast blasting in March first, 2007. Based on the local cast blasting experiment, combined with theory analysis and date statistics, this paper researched this method systematically for Heidaigou opencast mine. Most important it analyzes the affect rule for the cast blasting effects about bench height, powder factor, burden, spacing and denseness coefficient, gives the reasonable suggestions and the method about how to choose the parameter which is suitable for the Heidaigou opencast mine cast blasting design.This research combined with many local muckpile data, according to statistics analysis, revealed the rule of cast blasting pile, and built the whole Weibull distributing models and separated row Weibull distributing models, meanwhile it also built BP neural network model of predicting the effects of height bench cast blasting, and developed the effects prediction program V1.0 for cast blasting, by which the prediction for cast percentage and bulk factor and muckpile is possible.