?To explore the spatial strength distribution of backfill in the stope, a group of experiments in a large similar stope model was designed for simulating the consolidation of cemented tailings backfill (CTB) in a stope. The height of CTB in similar stope model was measured to analyse the flow and sedimentation characteristics. The unconfined compressive strength (UCS) test on specimens cored in the different position of CTB sample in similar stope model was conducted. Moreover, the particle size and cement content of CTB sample were tested to help to explain the mechanism. The results show that during the flow and sedimentation of filling slurry in the model, inconsistency of the particle size and cement content leads to the inconsistency of strength. In the flow direction (horizontal direction), the median particle size of CTB first increases and then decreases, the cement content of CTB decreases slowly and then increases sharply, and the strength of CTB first decreases and then rises. In the sedimentation direction (vertical direction), the cement content of CTB decreases with the increase of depth, while the strength of CTB increases with the increase of depth. The strength is affected by the interaction between particle size and cement content, and the higher cement content of CTB does not translate into higher strength. The results provide a theoretical basis for improving the quality of CTB and optimizing the design.
Focused on providing an update of the CPT-based SBT classification systems using behavior-based descriptions. The update includes a method to identify the existence of microstructure in soils. Examples are used to illustrate the advantages of such a system.
This bulletin provides a framework for classifying different types of tailings based on their geotechnical properties and provides typical geotechnical parameters for the different tailings types. It also presents technologies for dewatering tailings from thickening to filtration.
This webinar is on using the CPT for quality control of ground improvement, with a focus on deep compaction. It will discuss and present appropriate methods of creating CPT-based criteria for ground improvement.
This webinar will continue from the Introduction to CPT and take a more in-depth look at using the CPT to evaluate soils for liquefaction. It is part one of a three part series on using the CPT for liquefaction. This will cover mostly the introduction and theory.
This webinar continues on from CPT for Soil Liquefaction, part 1 and discusses using the CPT to evaluate flow liquefaction.
This webinar will continue from parts 1 and 2 of using the CPT to evaluate soils for liquefaction and focus on real-world examples using the software program Cliq. CLiq is a commercially available software program available from Geologismiki: www.geologismiki.gr
This webinar will continue from the Introduction to CPT and takes a more in-depth look at CPT interpretation and application to estimating soil parameters.
This webinar will continue from the Introduction to CPT and take a more in-depth look at interpretation and application to estimating soil parameters for coarse grained soils.
This webinar continues from CPT Interpretation and takes a more in-depth look at interpretation and application to estimating soil parameters for fine-grained soils.