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Completion criteria - Case studies considering bond relinquishment and mine decommissioning: Western Australia

机译:完成标准 - 考虑债券放弃和矿山退役的案例研究:西澳大利亚州

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The Western Australia Government Agencies controlling environmental bond assessment and land relinquishment after mine decommissioning advocate proactive environmental management. Meeting environmental objectives ensures return of bond monies and facilitates release of the Company from environmental obligations. Completion criteria that confirm establishment of a self-perpetuating and resilient vegetation cover over mine waste are being developed. Post-mining land use generally reverts to maintaining the natural ecosystem or rangeland. Within this climatic zone very distinct vegetation communities are closely linked to soil substrate classification. Matching surface waste characteristics from a mine waste dump with those of surrounding analogue communities is the first step in determining an achievable vegetation cover. Examples of the methodology as applied to one Western Australian mine site, a semi-arid location (annual rainfall 320 mm) (Westonia - 31°18′S, 118°42′E) is presented. There has, at Westonia, been establishment of Eucalypt Woodland on mildly saline waste surfaces. The combination of direct seeding at the appropriate sowing time and good topsoil management, has led to successful revegetation of a suite of species with all life forms represented.
机译:矿井退役后,西澳大利亚政府机构控制环境债券评估和土地放弃倡导主动环境管理。会议环境目标确保债券款项返回,并促进公司从环境义务发布。正在开发完成标准,确认在矿井废物上确认自我延期和弹性植被覆盖。挖掘后土地使用通常恢复到维护自然生态系统或牧场。在这种气候区内,非常明显的植被社区与土壤基质分类密切相关。与周围的模拟社区的矿物废物垃圾堆叠的匹配表面废物特征是确定可实现的植被覆盖的第一步。应用于一个西部澳大利亚矿工的方法的实例,提供半干旱地点(年降雨量320 mm)(威斯顿蒂亚 - 31°18's,118°42'e)。在Westonia,在轻度盐水废物表面上建立了桉树林地。直接播种在适当的播种时间和良好的表土管理方面的结合导致了一系列物种的成功恢复,具有代表所有生命形式。

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