Development characteristics of the rock fracture field in strata overlying a mined coal seam group

ABSTRACT: The fracture development of the overlying strata after coal mining is an important guarantee of efficient gas drainage. In order to explore the fracture evolution characteristics close to a mined coal seam group, the F15.16−24130 working face in the Pingdingshan No. 10 coal mine was taken as the research background. The FLAC3D numerical simulation software was used to study the migration and failure characteristics of the overlying strata during mining of a coal seam group, and the fracture evolution process of the stope was investigated. The results show that as the advancing distance increased, the fracture density and fracture height increased continuously due to deformation and failure of the overlying rock. The displacement of the overlying rock initially increased and then decreased,

SUBMITTER: Qi Y 

PROVIDER: S-EPMC9534389 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature