关键词: 急倾斜薄矿体, 空场-崩落组合法, 安全措施

Abstract: Open-stope & caving method is widely applied to recover thin ore bodies of Gongchangling iron mine. This method needs to take reasonable technical measures to prevent accidents induced by rock falling of mined area. By means of analyzing the influence factors and occurrence processes of hanging wall falling, a reasonable sublevel number of ore removals is determined according to the area of the continuous falling and a continuous mining-out area is formed among the different levels to control the formation of rock falling by small pieces. Then, it is to remain some blasted ore to block the drift outlet at the last mining level to prevent the impact of air flows induced by the rock falling. These two measures can effectively guarantee the safe mining conditions of the sublevel stope & caving method and obtain a practical effect in Gongchangling iron mine.

Key words: Steep &, thin ore-body, Open-stope and caving method, Safety measures