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首页> 外文会议>Annual national meeting American Society for Surface Mining and Reclamation >ERODIBILITY OF FLY ASH-TREATED MINESOILS
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ERODIBILITY OF FLY ASH-TREATED MINESOILS

机译：粉煤灰处理的Minesoils的蚀刻性

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Fly ash, a by-product of coal-fired power plants, has been used successfully in reclaiming adverse mine sites such as abandoned mine lands by improving minesoil chemical and physical properties. But, the fine sand-silt particle size of fly ash may make it more susceptible to detachment and transport by erosive processes. Furthermore, the high content of silt-size particles in fly ash may make it more susceptable to surface crust formation resulting in reduced infiltration and increased surface runoff and erosion. In the summer of 1989, fly ash/wood waste mixtures were surface applied on two separate mine sites, one with 10% slope and the other 20% slope, in central Preston County, West Virginia. Erosion rates were measured directly using the Linear Erosion/Elevation Measuring Instrument (LEMI). Erosion measurements were taken during the first two growing seasons on both sites. Erosion values were up to five times greater on the fly ash-treated minesoil than on the minesoil without fly ash cover. Mulching with wood chips reduced fly ash erosion to about one-half the loss of the unmulched plots. Erosion was related to both the amount and type of ground cover. Increased vegetative ground cover resulted in reduced erosion. Mosses and fungi appeared to provide better erosion protection than grass-legume cover.
机译：粉煤灰是燃煤发电厂的副产品，通过改善Mineoil化学物质和物理性质，成功地在回收不利的矿山之类的不利矿场地区。但是，粉煤灰的细砂粒子粒度可以使其通过腐蚀过程更容易脱离和运输。此外，粉煤灰中的淤泥尺寸颗粒的高含量可以使其更容易受到表面外壳形成，导致渗透率降低和增加的表面径流和腐蚀。在1989年夏天，粉煤灰/木材废物混合物在两个单独的矿场施加了表面，其中一个坡度10％和其他20％的坡度，西弗吉尼亚州中部普雷斯顿县。使用线性侵蚀/升降测量仪（LEMI）直接测量侵蚀速率。在两个地点的前两个生长季节期间采取了侵蚀测量。在粉煤灰处理的小型物体上侵蚀值高达五倍，而不是在没有粉煤灰覆盖的情况下的MineSoil。覆盖木屑将粉煤灰侵蚀减少到未挤压图的损失的一半。侵蚀与地面盖的数量和类型有关。增加的植物地面覆盖覆盖导致侵蚀降低。苔藓和真菌似乎提供比草豆类盖子更好的侵蚀保护。

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