Deformation Characteristics and Determination of Deformation Modulus of Rocks around the Lower Gangway during Coal Mining Operation

석탄층 하반갱도 주위암반의 변형특성 및 변형계수 결정연구

The cavities formed by the excavation of coal seam cause unstable within rock body, leading to large displacement around adjacent roadway. This displacement brings the closure of roadway and deformation of support. Therefore, it is necessary to understand and predict the deformation characteristics of roadway while coal seam is under excavation. In this study, the observed displacements are compared with the calculated ones through the analysis using Linear Boundary Element Mothod under the elastostatic conditions, in order to determine the virgin stress state and deformation modulus which affect the deformation characteristices.