Effect of freezing on weak rock mass behaviour

冻结对软弱岩体行为的影响

• 批准号: 381218-2009
• 负责人: Pakalnis, Rimas
• 金额: $ 3.97万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=438663
• 关键词: Effect; freezing; weak; rock; mass

Cigar Lake Mine is a prospective uranium property in northern Saskatchewan currently under phased remediation to restore underground workings after major water inflows in 2006 and 2008. The ore is planned to be mined within an area of hydrothermal alteration at the unconformity between sheared and altered graphite metapelite basement rock and overlying Athabasca Sandstone. The objective of this research is to determine how freezing affects the rock mass behaviour with direct application to the Cigar Lake Mining Method. Geotechnical challenges during mining the Cigar Lake orebody include control of groundwater and ground support of weak rock. Artificial ground freezing supports the weak rock associated with the orebody and the minimization of the potential for a large water inrush while mining the ore. The impervious nature of ice and

Cigar Lake 矿是萨斯喀彻温省北部的一个潜在铀矿区，目前正在分阶段修复，以在 2006 年和 2008 年大量水流入后恢复地下作业。该矿石计划在剪切和蚀变石墨变泥岩之间不整合面的热液蚀变区域内开采。基底岩石和上覆的阿萨巴斯卡砂岩。本研究的目的是确定冻结如何影响岩体行为，并直接应用于雪茄湖采矿方法。雪茄湖矿体开采过程中面临的岩土工程挑战包括地下水控制和软弱岩石的地面支撑。人工地面冻结支持与矿体相关的软弱岩石，并最大限度地减少采矿时发生大量涌水的可能性。冰的不渗透性和