摘要
为了研究急倾斜厚煤层综放开采覆岩运移规律,结合矿山压力及其岩层控制相关理论分析急倾斜煤层上覆岩层"三带"特征,运用数值模拟软件UDEC和FLAC^(3D)对急倾斜综放开采在30°、45°、60°倾角条件下上覆岩层运移形态进行了模拟,得到了相应的覆岩移动变形规律,"三带"分布、高度及应力云图。研究结果表明:通过理论分析和数值模拟验证了急倾斜煤层工作面推进过程中覆岩运移规律与水平煤层不同,"三带"高度升高,且沿倾向随角度增大工作面上端头运移量较大,矿压显现明显,工作面下端头围压较大。
To study the overlying-movement law of fully-mechanized top coal caving along strike in steep-inclined thick coal seam,combining the related theory of mining pressure and strata control analysis the characteristics of 'three zones' overlying of steep-inclined coal seam,overlying strata movement distribution of fully-mechanized top coal caving in steep dip 30°,45°,60° were simulated by using numerical simulation software UDEC and FLAC3D,corresponding overlying strata movement rule was gained as well as 'three zones' distribution,height and the stress nephogram.Research results show that overlying strata movement law of the working face of steep coal seam in the process of propelling is different from horizontal coal seam by theoretical analysis and numerical simulation,and the height of 'Three zones' increases.The migration amount of upper part of work face is larger and behavior of rocks rate is clear with the increasing angle of working face in the process of propelling,and pressure is larger at the bottom of the working face.
出处
《中州煤炭》
2013年第9期7-9,共3页
Zhongzhou Coal
关键词
急倾斜煤层
覆岩运移
数值模拟
＂三带＂分布
steep-inclined coal seam
overlying strata movement
numerical simulation
'Three zones' distribution
