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Mining Contract: Generation of Geomechanical and Time-dependent Properties of Coal and Coal Measure Rocks

Contract DetailValue
Contract #200-2011-40676
Start Date9/1/2011
Research Concept

This contract will work to reinitiate efforts to understand the time-dependent behavior of some coal measure rocks under certain loading conditions, evaluate post-failure behavior, and provide quality laboratory inputs for numerical modeling.

Program Area

Contract Status & Impact

For decades, researchers have worked to understand strata instability and methods to mitigate the problem. With recent technology advances, numerical models have become a common method for predicting strata instability. Numerical models need reliable, site-specific input data to produce useful results. However, it is not always feasible to get high-quality rockmass inputs during routine designs, so designers often rely on published data from similar geo-mining conditions. While this approach has worked reasonably well, very little information is available when it comes to inputs needed for advanced modeling techniques.

Two significant areas that require more understanding relate to post-failure behavior and time-dependent properties of coal measure rocks. Strata instability in a coal mine is a highly time-dependent phenomenon, but little effort has been made to collect good data on the effect of time.

This contract seeks to reinitiate efforts to understand the time-dependent behavior of some coal measure rocks under certain loading conditions, evaluate post-failure behavior, and provide quality laboratory inputs for numerical modeling.

 
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