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- W69975647 abstract "The Surface Mining Control and Reclamation Act (SMCRA) requires that surface coal mining leave a landscape with stable backfills and excess spoil fills. The regulations promulgated as a result of SMCRA detail the performance standards to that end by establishing minimum factors of safety for backfills in steep slope areas and for excess spoil areas outside of the mining pit. To demonstrate that the performance standards are attainable, the permit rules require geotechnical analyses of the spoil, foundation area and an assessment of surface and groundwater influence. These permit and performance standards are intended to serve as insurance for long-term structural stability of the mined area. Critical to any geotechnical evaluation are the selection of appropriate shear strength parameters for the spoil materials. This is an unusual challenge, since the spoil materials ultimately placed are a heterogeneous mixture of the various overburden strata. Judgments must be made on a site-by-site basis, not only on the type of tests which will best model the predicted conditions, but also which materials will most influence stability. In addition to the stratigraphy, mining methods, placement techniques, material degradation, material blending, particle sizes and many other factors determine in-place shear strengths. The following discussion willmore » review these factors and recommended procedures and the logic for assumptions which should be valid for surface mining conditions.« less" @default.
- W69975647 created "2016-06-24" @default.
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- W69975647 date "1984-12-01" @default.
- W69975647 modified "2023-09-26" @default.
- W69975647 title "Selecting geotechnical parameters in the analysis of surface mining spoil stability" @default.
- W69975647 hasPublicationYear "1984" @default.
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