ABSTRACT
Research work focused on developing numerical models of the escarpment region and calibrating the models with observations from the escarpment failure. In the immediate vicinity of the 6th East and 7th East longwall panels, however, there is an absence of larger structures. Prior to mining the 6th East and 7th East longwall panels, four survey monuments were mounted along the escarpment crest in order to track ground movement during the mining process. During the twelve month period that the 6th and 7th East panels were mined, displacement measurements were taken on a weekly basis from the survey monuments. The FE model for the cross section covered a horizontal distance of approximately 6,000 ft and extended to a depth of 4,400 ft from the summit of the Wasatch Plateau. In order to better understand the mechanical behavior of the escarpment itself, a two dimensional distinct element model was constructed.
