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首页> 外文会议>Second Biot Conference on Poromechanics Aug 26-28, 2002 Grenoble, France >Poromechanical behavior of ferriferous rocks
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Poromechanical behavior of ferriferous rocks

机译：铁质岩石的岩石力学行为

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摘要

Mining collapses currently occur in Lorraine (France) above abandoned room-and-pillar iron mines. The modeling of the hydromechanical behavior of iron mines rocks has been performed by using the Biot theory and effective stress concept. These assumptions need experimental justifications. Different kinds of hydrostatic tests are presented in order to characterize matrix rocks behavior: hydrostatic test for the determination of the elastic deformability, Yamada test for the determination of the plastic defomability and another kind of test to verify this plastic deformability. It results that matrix is elastically compressible, then the fluid-mechanical behavior is modeled by the Biot theory. Moreover, iron ore matrix is plastically incompressible and the validity of the plastic effective stress is verified. A numerical simulation (effective-stress ca culation), with experimental parameters as inputs, is presented in order to analyze the impact of a 60 m water-table on the mechanical stability of a room-and-pillar model.
机译：目前，法国洛林（Lorraine）废弃的有室和柱状铁矿上方发生采矿塌陷。利用毕奥特理论和有效应力概念对铁矿山岩石的流体力学行为进行了建模。这些假设需要实验证明。为了表征基质岩石的特性，提出了各种静水压试验：用于确定弹性变形性的静水压试验，用于确定塑性可变形性的Yamada试验和用于验证这种塑性变形性的另一种试验。结果表明，基体是可弹性压缩的，然后利用毕奥特理论对流体力学行为进行建模。此外，铁矿石基体是塑性不可压缩的，并验证了塑性有效应力的有效性。为了分析60 m地下水位对房柱模型机械稳定性的影响，提出了以实验参数为输入的数值模拟（有效应力计算）。

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