摘要
采用FLAC3D数值模拟软件就不同采高下覆岩移动的规律进行了分析,为神东矿区安全采煤及其地面保护提供理论依据。研究结果表明:在相同开采条件下,上覆岩层的下沉量有随采高增加而增加、随离煤层距离增加而减弱的趋势。模拟结果中,距离煤层较近的覆岩位移突然增大,出现切落式下沉现象,可能为关键层破断引起;而距离煤层较远的覆岩并未出现此种现象,只为缓慢下沉,可能覆岩未破断,仍然起到支撑作用。
The FLAC3D numerical simulation software is used to analyze the strata movement rule under different mining height so as to provide some theoritical foundations for the mining safety of the Shendong mining area and it~ ground protection. The research results show that, the overlying strata sub- sidence tends to increase along with the increase of the mining height and it tends to decrease along with the increase of the distance from the overlying strata to the coal seam under the same mining conditions. According to the simulation results, the movement of overlying strata that close to the coal seams increases sharply and the cut down type sinking of overlying strata occurs, it maybe caused by the breaking of key layers. The type of slowly sink occurs in the overlying strata that far form the coal seam, it is because that the overlying strata plays a supporting role.
出处
《现代矿业》
CAS
2014年第3期4-6,共3页
Modern Mining
基金
"十二五"国家科技支撑计划项目(编号:2012BAC10B03)
关键词
采高
覆岩移动
数值模拟
开采沉陷
Mining height, Strata movement, Numerical simulation, Mining subsidence
