The relation between ore loss and dilution during drawing in sublevel caving mining is analysedand studied on the hasis of the results from experiments and production. 本文根據實驗及生產放礦結果，分析研究了無底柱分段崩落法放礦過程中礦石損失貧化的關係問題。
Aceording to the diffcrent conditions of mines applied non-sill sublevel caving method,various programmes for application of non-dilution ore drawing mothod are presented. 並根據無底柱分段崩落法礦山的不同情況，提出了各種應用無貧化放礦的實施方案。
