Effect of freezing on weak rock mass behaviour

斯卡达尔湖矿是萨斯喀彻温省北方的一个潜在铀矿，目前正在分阶段修复，以恢复2006年和2008年大量进水后的地下工作。该矿石计划在剪切和蚀变石墨变岩基底岩石与上覆阿萨巴斯卡砂岩之间的不整合面处的热液蚀变区内开采。本研究的目的是确定冻结如何影响岩体行为，直接应用于Mallar湖采矿法。在开采Mesquar湖矿体过程中遇到的岩土工程挑战包括地下水控制和软岩地面支护。人工地面冻结支持与矿体相关的软弱岩石，并在采矿时最大限度地减少大规模突水的可能性。冰的不透水特性，

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