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某矿第二矿区西北区的五个露天开采山头,自从1956年采用露天法开采以来,曾先后在不同技术条件下,应用了不同类型的露天漏斗开采方法,取得了一定的经验教训,从而为本矿人工作业山头的开采方法找出了方向。一、地质条件与设计要求(一)地质赋存条件该区地形复杂,山地标高从85米到353米;走向全长1940米,走向NW300～340°,倾斜NE60～85°;不同山头分布不同层位的矿体,矿体厚度变化亦大,最小者6
Since the open-pit mining in 1956 in the northwestern part of the second mining area of a mine, different types of open-air funnel mining methods have been applied under different technical conditions successively, and certain experiences and lessons have been obtained so that The mining method of manual operation of the mine has found its direction. I. Geological Conditions and Design Requirements (I) Geological Preservation Conditions The terrain of the area is complex with the elevation of the mountain ranging from 85 meters to 353 meters; the total length of 1940 meters reaches NW300 ~ 340 ° with an inclination of NE60 ~ 85 °; different hills have different distribution Layer ore body, ore body thickness changes are also large, the smallest 6