山东煤炭科技2024，Vol.42Issue(6)：139-143,154,6.DOI:10.3969/j.issn.1005-2801.2024.06.028
厚煤层开采上覆岩层移动与应力分布特征研究
Research on Movement and Stress Distribution Characteristics of Overlying Strata in Thick Coal Seam Mining
张建 1亓佳利 1李长青1
作者信息
- 1. 山东能源集团鲁西矿业有限公司,山东 菏泽 274000
- 折叠
摘要
Abstract
The collapse of the thick roof often causes an impact on the coal rock mass in front of the fully mechanized caving face.In order to prevent and control the rock burst disaster caused by thick coal seam mining and understand the safety and stability of the working face mining,a 3D mining model of the 1301 working face of Lilou Coal Mine is established using FLAC3D.The characteristics of overlying rock movement and stress distribution as the working face advances are obtained,and the lateral support pressure of the thick surface soil layer is theoretically calculated to analyze the overall safety of the stoping face.The results show that the movement of the overlying strata in the goaf gradually develops upwards with the advancement of the working face.When the working face is pushed to 400 m,the height of the movement of the overlying strata reaches its maximum;the influence range and stress concentration degree of the advanced support pressure of the working face gradually increase with the pushing and mining of the working face.When the working face is pushed and mined to the square,the stress of the advanced support pressure reaches 60 MPa,and the stress peak is about 70 m away from the working face.关键词
厚煤层/覆岩/移动/应力/分布Key words
thick coal seam/overlying rock/movement/stress/distribution分类
矿业与冶金引用本文复制引用
张建,亓佳利,李长青..厚煤层开采上覆岩层移动与应力分布特征研究[J].山东煤炭科技,2024,42(6):139-143,154,6.
