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首页> 外文会议>GeoShanghai International Conference; 20060606-08; Shanghai(CN) >The Geomechanical Behavior of Australian Black Coal under the Effects of CO_2 Injection: Uniaxial Testing
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The Geomechanical Behavior of Australian Black Coal under the Effects of CO_2 Injection: Uniaxial Testing

机译：注入CO_2作用下澳大利亚黑煤的地质力学行为：单轴试验

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摘要

In recent times sequestration of carbon dioxide (CO_2) into unmineable coal seams has been investigated extensively, including field trials in USA, Canada, Japan and Poland. Economic feasibility studies have indicated that the cost of sequestration can be offset to some extent by harvesting the methane (CH_4) in the coal seam. Besides issues with injectivity of low permeability coals, the long term safety, such as potential leakage of the sequestered gas, needs to be assessed. This requires an understanding of the geomechanical behavior of black coal. Some initial studies suggested that CO_2 may have a softening effect on coal. This paper outlines some experimental results obtained in the investigation of the effects of CO_2 on the strength and deformation properties of black coal. Preliminary laboratory results obtained from acoustic emission and standard stress strain plots indicate a softening effect of CO_2 on black coal under uniaxial compression test conditions.
机译：近来，已经广泛地研究了将二氧化碳（CO_2）封存到不可开采的煤层中，包括在美国，加拿大，日本和波兰进行的田间试验。经济可行性研究表明，通过收集煤层中的甲烷（CH_4）可以一定程度地抵消固存成本。除了低渗透性煤的可注入性问题外，还需要评估长期安全性，例如螯合气体的潜在泄漏。这需要了解黑煤的地质力学行为。一些初步研究表明，CO_2可能会对煤产生软化作用。本文概述了在研究CO_2对黑煤强度和变形特性的影响中获得的一些实验结果。从声发射图和标准应力应变图获得的实验室初步结果表明，在单轴压缩测试条件下，CO_2对黑煤的软化作用。

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