Effect of freezing on weak rock mass behaviour

雪茄湖矿是萨斯喀彻温省北部的一处潜在铀矿，在2006年和2008年发生重大涌水后，目前正在进行分阶段修复，以恢复地下工作场所。该矿石计划在热液蚀变区域内开采，该区域位于剪切和蚀变的石墨变泥岩基岩与上覆的阿萨巴斯卡砂岩之间的不整合处。这项研究的目的是通过直接应用雪茄湖采矿方法来确定冻结对岩石性质的影响。雪茄湖矿体开采过程中的岩土工程挑战包括地下水控制和软岩地面支撑。人工地面冻结支持与矿体相关的软弱岩石，并将开采矿石时发生大规模突水的可能性降至最低。冰的不透水性质和

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