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(一)概况 永平铜矿露天采场封闭圈标高154米,封闭圈以上为山坡露天,露采终了最大边坡比高为444米,总边坡角37～47°。矿区最高部位天排山在采场之西,基建剥离后已形成144米的边坡比高,终了台阶数6个。 剥离废石排弃在天排山南、北端,现已形成宽50～120米,比高50～100米、坡角35～37°的排土场。1978年雨季,北部排土场曾发生过泥流。
(I) Overview The open loop of Yongping Copper Mine has a height of 154m and the closed loop is above the open hillside. The maximum slope slope of 444m and the total slope angle of 37 to 47 ° at the end of exposed mining are the highest. Tianshang Mountain, the highest part of the mining area, is west of the stope. After the infrastructure has been stripped, a slope of 144 meters has been formed and the number of steps has finally reached 6. Peel off the waste rock in the days row south, north end, has now formed a width of 50 to 120 meters, 50 to 100 meters higher than the slope angle of 35 ~ 37 ° of the dump site. In the rainy season of 1978, there was mud flow in the northern dump.