小露天矿陡边坡开采经验

Experience of steep slope mining of small open pit

招远市大河金矿对划归地下开采的一中段以上有露头大矿体,实行陡边坡露天开采。设计上下盘边坡角75°与70°,而在实际生产过程中,又采取一系列防水、防飞石、防震动、防滑坡等技术措施,使设计采剥比由1:4降至1:2.56,取得明显经济效果。

: The thick cropping orebody of a level and over which was originally put under underground mining was redesigned locarry on sleep slope opencutling. The solpe angles of upper and lower wall were designed to be 75° and 70° respectively, however a series of measures such as waterproof, shockproof, guarding against flying rocks and landslide were taken, causing the designed stripping ratio 1 : 4 lo be reduced lo 1 : 2.56.