关键词: 节理密度, 采煤沉陷, 影响机理

Abstract: In order to find out the impact degree of joints density on the maximum ground subsidence value，and based on the numerical simulation，the average degree in the software was adopted to approximately represent the joints density，then the changes of acoustic emission in the overburden and ground maximum subsidence value were studied in different degreesThe result showed that as the average degree increases，the energy and scope of acoustic emission would decrease，so did the ground maximum subsidence value

Key words: Joint density, Coalmining subsidence, Influence mechanism