Assessment of Chock Capacity and Strata Caving for a Longwall Mine |
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Authors: | Manoj Khanal Deepak Adhikary Rao Balusu |
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Institution: | (1) Earth Science and Resource Engineering, Commonwealth Scientific and Industrial Research Organization, CSIRO, Queensland Center for Advanced Technology, 1 Technology Court, Pullenvale, QLD, 4069, Australia |
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Abstract: | A mine scale numerical analysis of modern day longwall using a 3D Cosserat continuum method has been presented. The effect
of mine specific geological conditions on viability of introducing a modern day longwall is comprehensively investigated and
analysed in this paper. The various longwall parameters like chock (face support) convergence and strata caving mechanism
are evaluated. The varying thickness of the sandstone present in the roof can be seen to have a strong impact on the magnitude
and pattern of chock convergence. The paper also discusses the performance of chocks with different capacities under identical
conditions. The effect of overlaying sandstone properties and width of the longwall panels have also been investigated. The
analyses carried out in this study is expected to provide valuable process guidance during the mine design in relation to
selecting the optimal mine geometry and support capacity so that the potential mining hazards could be minimized. |
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