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In situ characterisation of weak cretaceous clay shales and rich feed oil sands using a self-bore pressuremeter

使用自孔压力计对软质白垩系粘土页岩和富集油砂进行原位表征

基本信息

批准号：
556988-2020
负责人：
Elwood, DavidDEY
金额：
$ 5.33万
依托单位：
University of Saskatchewan
依托单位国家：
加拿大
项目类别：
Alliance Grants
财政年份：
2022
资助国家：
加拿大
起止时间：
2022-01-01 至 2023-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=749517
关键词：
situ characterisation weak cretaceous clay

项目摘要

The proposed research will use advanced pressuremeter testing to determine the in-situ characteristics of the shale overburden and oil sands formations at an advancing oil sands mine. The characteristics of interest will be to develop non-linear stiffness models capable of capturing weakened, post-yield deformations. The research will also attempt to accurately determine the evolution of the principle stresses in-situ prior to mine excavation and after the completion of pit wall excavation. Finally, testing in the rich feed oil sands will attempt to characterize the strength loss of over-saturated soils (with respect to dissolved gas) during pit wall excavation. The parameters obtained from the advanced field program will be supplemented by laboratory tests and fed into 2-dimensional and 3-dimensional stress-strain models capable of predicting pit wall movements during mine advancement. The efficacy of these models will then be compared to field monitoring programs including physical monitoring and remote sensing techniques. The goal of this research is to better develop a displacement based observational design for pit wall construction through the Cretaceous clay shale and to better predict the mechanisms associated with gas dissolution and flow slides, which can occur in rich feed ore. These goals will be used by the Industrial Partner to provide information needed to manage risks associated with worker health and safety as well as potential production downtime.

这项拟议的研究将使用先进的压力计测试来确定正在推进的油砂矿的页岩覆盖层和油砂地层的现场特征。令人感兴趣的特征将是开发能够捕捉削弱的屈服后变形的非线性刚度模型。这项研究还将试图准确地确定矿山开挖前和坑壁开挖完成后原地主应力的演变。最后，在富含油砂的土壤中进行试验，以确定坑壁开挖过程中过饱和土壤(相对于溶解气体)的强度损失。从先进的现场计划获得的参数将通过实验室测试进行补充，并输入到能够预测矿井推进期间坑壁移动的二维和三维应力-应变模型中。然后，将把这些模型的效果与包括物理监测和遥感技术在内的现场监测项目进行比较。这项研究的目标是更好地开发基于位移的观测设计，以通过白垩纪粘土页岩建造坑壁，并更好地预测与气体溶解和流动滑移相关的机制，这些机制可能发生在丰富的原料矿石中。工业合作伙伴将使用这些目标来提供管理与工人健康和安全相关的风险以及潜在的生产停机时间所需的信息。