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|Title:||Effect of lithological variations of mine roof on chock shield support using numerical modeling technique|
|Authors:||Verma, A K|
|Keywords:||Chock-shield;Drucker-Prager;Finite element method;Longwall;Regression|
|Abstract:||Interaction between chock shield supports, the most popular powered supports in Indian longwall mines, and surrounding coal measure strata is analyzed using finite element models. Thickness and material properties of the main roof, the immediate roof and the coal seam are varied to simulate various geological conditions of Indian coal measure strata. Contact/gap elements are inserted in between the main roof and overburden layer to allow strata separation. Nonlinear material properties are applied with plastic corrections based on Drucker-Prager yield criterion. This paper illustrates effects of lithological variations on shield load, abutment stress, yield zone and longwall face convergence.|
|ISSN:||0975-1084 (Online); 0022-4456 (Print)|
|Appears in Collections:||JSIR Vol.65(09) [September 2006]|
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