英语翻译Abstract Underground coal mining can affect wells and sp

英语翻译
Abstract Underground coal mining can affect wells and springs used as water supplies.In Virginia,concerns over such impacts are felt by both surface owners and coal-mining firms.Virginia’s geologic history has caused faults and fractures to be common in its coalfield region,relative to other Appalachian coal-mining areas.The results of 73 investigations of alleged domestic water supply impacts by underground mining were analyzed; the investigations were conducted by the Virginia Division of Mined Land Reclamation (VDMLR).This analysis was conducted with reference to guidelines that define a primary zone of underground mining influence where dewatering of aquifers is to be expected.The VDMLR data set included 27 investigations of alleged water supply impacts by partial-extraction room-and-pillar mines,41 investigations of high-extraction room-and-pillar mines,and 4 investigations of longwall mines.VDMLR investigators found that 14 of 16 water supplies within the primary zone of influence were likely to have been affected by pillar-retreat mining,but no water supplies within the primary zone of influence for longwall and room-and-pillar mines were represented in the data base.VDMLR investigators found 42 of 56 water supplies outside of the primary zones were likely to have been affected by mining; these cases represented room-and-pillar,pillar-retreat,and longwall mining.Geologic circumstances not directly related to subsidence were found to be responsible for 31 of these 42 impacts.These geologic circumstances included subsurface fractures and other geologic features acting as aquifers that were drained by underground mining operations.VDMLR investigators also found some of the investigated water losses to have been caused by factors other than mining.These results demonstrate the inherent difficulties of any attempt to rigidly define a “zone of underground mining impact” based solely on mine subsidence effects,especially in regions where geologic faults and fractures are common such as the southwest Virginia coalfield.
Key words Mine subsidence 7 Groundwater resources 7 Coal mining 7 Surface Mining Control and Reclamation Act

摘要地下采煤影响水井和泉水用来作为食水供应.在维吉尼亚州,关注这种影响是认为,双方表面上业主和煤炭开采企业.弗吉尼亚州的地质历史所造成的故障及骨折须共同在其煤田地区,相对于其他阿巴拉契亚煤炭开采领域.结果73调查指称的家庭供水的影响,地下开采进行了分析;的调查所进行的弗吉尼亚州的分工矿山复垦（ vdmlr ）.此进行了分析与参考准则,确定一个主要区域的地下开采的影响如脱水的含水层是意料之中的.该vdmlr数据集,包括27个调查指称的食水供应的影响,部分提取房柱式地雷,41个调查高提取房柱式地雷,和第4的调查,长地雷.vdmlr调查发现,14 16食水供应与主要区域的影响力有可能受到影响的支柱-撤退挖掘,但没有食水供应与主要区域的影响力为长和房柱式地雷派代表出席了在该数据基地.vdmlr调查人员发现42 56供水以外的主要区域有可能受到影响的开采;这些个案所代表的房柱式,支柱-撤退,和长壁开采.地质情况没有直接关系的沉降,发现负责31日,这些42 的影响.这些地质情况,包括地下骨折和其他地质特征作为含水层已被排出地下采矿作业.vdmlr调查还发现,一些调查水的损失已造成以外的其他因素挖掘.这些结果表明,固有的困难,任何企图硬性规定,确定一个“区地下开采的影响,”纯粹基于塌陷的影响,尤其是在所在地区的地质断层和骨折是常见的如西南弗吉尼亚州煤田.
关键词塌陷七地下水资源7采煤7表面采矿控制和填海行为
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