Research on Migration Laws of Overlying Rock of Fully-mechanized Top-coal Caving Mining in Steep-inclined Thick Coal Seam
In order to study the overburden rock migration laws of fully-mechanized top-coal caving mining in steep-inclined thick coal seam,we make the research which is combined with the relevant theory of mine pressure and strata control to analyze overburden three zones characteristics in steep-inclined coal seam.We also use numerical simulation software (the UDEC and Flac3D) to simulate steep-inclined fully-mechanized top-coal caving mining overburden migration forms at different inclination conditions,such as 30 degree,45 degree,60 degree,and get the corresponding strata movement rules,three zones distribution,height and stress nephogram,which cloud provide a theoretical basis for steep-inclined rock control.The results of the study show that through the field test and numerical simulation we verify that the steep-inclined coal seam mining face is different with horizontal coal seam in the process of advancing the migration law of overburden rock.The height of Three zones increases,and along with the increasing tendency of angle the migration quantity is larger at the upper parts of working face,mine pressure appear obviously,the same time confining pressure is bigger at the lower parts of working face.
steep-inclined coal seam roof migration numerical simulation UDEC three zones distribution
Liu Jinkai Zhang Bao Cheng Chenxin Zhang Shiqing Zhang Chunlei Zhao Jianjian
School of Resources and Safety Engineering, China University of Mining and Technology(Beijing), Beijing, 100083, China
国际会议
International Symposium on Rock Mechanics and Mine Dynamic Disaster Prevention(岩石力学与矿井动力灾害防治国际学术研讨会)
辽宁阜新
英文
210-214
2013-07-13（万方平台首次上网日期，不代表论文的发表时间）