求翻译：根据其来源可分为三种类型:一是剥离表土,开采的废石及低品位矿石堆积形成的废石堆废弃地;二是随着矿物开采形成的大量的采空区域及塌陷区,即开采坑废弃地;三是利用各种分选方法分选出精矿物后的剩余物排放形成的尾矿废弃地。矿业废弃地不仅侵占大量的耕地,它还是持久而严重的污染源是什么意思？

Can be divided into three types according to their source: First, stripped topsoil, mining waste rock and low grade ore accumulation of waste rock pile wasteland; with mineral exploitation in the formation of a large number of mined areas and sinking area, namely mining pit waste land; third is form

According to the source can be divided into 3 types: one is stripping topsoil, the exploitation of the waste rock and low-grade ore stacked in the waste pile is discarded; 2 with the extraction of minerals form a large number of row empty area and collapse, which is mining pit waste land; 3 is throu

May divide into three kind of types according to its origin: One, the peeling surface soil, the mining scrap rock and the low-grade ore stack forms the waste stone pile abandons; Two, forms along with mineral mining massive picks the spatial region and the collapse area, namely the mining pit abando

According to their sources can be divided into three types: first, stripping the topsoil, exploitation of low grade ore and waste rock formation of stacked heap wasteland; the second is as the formation of mineral mining subsidence area of goaf of large regional and, namely, abandoned mining pit; th