论文部分内容阅读
在阿巴拉契亚山区,每年大约31,000英亩的土地被露天采矿所扰动.迄今为止,已有大约一百万英亩被露天开采,预计煤炭储量面积约为三亿一千万英亩.在这一地区,煤炭产量的五分之一是剥离表土至煤层的露天开采.露天开采有两种类型:(a)露天开采面完全是平坦的;(b)在山区通常沿等高线开采,好象环山公路削土一样.沿等高线开采,是用巨大的机械将表土剥离并把煤炭送出.一旦露天开采结束后,需采取一些土壤改良措施,为对扰动的地区进行整地和恢复植被.
In the Appalachian Mountains, about 31,000 acres of land each year are disturbed by surface mining, and so far about 1 million acres have been mined open and the coal reserves are estimated at about 301 million acres. Region, one-fifth of coal production is from open topsoil mining to topsoil. There are two types of open pit mining: (a) the open pit surface is completely flat; (b) the mountain is usually mined along the contour as if Habitat along the Huan Shan Highway is the same as that of the mining of the contour lines by using huge machinery to strip the topsoil and send out the coal.Once the open pit mining is completed, some soil improvement measures should be taken to soil the disturbed area and restore the vegetation.