55 research outputs found
FRMRC presentations to practitioners workshop
Practitioners workshop introduction - Infrastructure management
Channels and their management
Estimating blockage potential at culvert trash screens
Fragility curves
Predicting breach
Simplified tools for risk assessment
2nd generation asset inspection techniques
Use of non-invasive measuring techniques in asset inspection
Asset deterioration - Assessment and measurement
Attributing risk to assets - Examples from pilot projects
Practitioner workshop on asset managment
Multi-objective optimisation of flood risk mitigation measures, including real options
Next steps to implementation and future research need
Predicting cave initiation and propagation
The most widely used method for predicting the onset of continuous caving is Laubscher's caving chart. A detailed examination of this method was undertaken which concluded that it had limitations which may impact on results, particularly when dealing with stronger rock masses that are outside current experience. These limitations relate to inadequate guidelines for adjustment factors to rock mass rating (RMR), concerns about the position on the chart of critical case history data, undocumented changes to the method and an inadequate number of data points to be confident of stability boundaries. A review was undertaken on the application and reliability of a numerical method of assessing cavability. The review highlighted a number of issues, which at this stage, make numerical continuum methods problematic for predicting cavability. This is in particular reference to sensitivity to input parameters that are difficult to determine accurately and mesh dependency. An extended version of the Mathews method for open stope design was developed as an alternative method of predicting the onset of continuous caving. A number of caving case histories were collected and analyzed and a caving boundary delineated statistically on the Mathews stability graph. The definition of the caving boundary was aided by the existence of a large and wide-ranging stability database from non-caving mines. A caving rate model was extrapolated from the extended Mathews stability graph but could only be partially validated due to a lack of reliable data
Predicting open stope stability and cavability using the Extended Mathews stability graph
An immuno-histochemical technique used to demonstrate the transition form of a squamous cell carcinoma in a mirror carp, Cyprinus carpio L.
- …